ДВИГАТЕЛЬ ВНУТРЕННЕГО СГОРАНИЯ С УСТРОЙСТВОМ ТОРМОЖЕНИЯ ДВИГАТЕЛЕМ

Двигатель внутреннего сгорания содержит по меньшей мере один выпускной клапан для отвода отработавших газов из по меньшей мере одной камеры сгорания, а также устройство торможения двигателем с гидравлическим узлом управления клапаном, с помощью которого выпускной клапан при приведенном в действие устройстве торможения двигателем может удерживаться в промежуточном открытом положении. Далее, двигатель внутреннего сгорания содержит гидравлический механизм регулировки клапанных зазоров для выпускного клапана и масляный канал, который для подвода масла в дополнительный гидравлический узел управления клапаном выполнен между последним и механизмом регулировки клапанных зазоров и который для регулировки клапанного зазора выпускного клапана может запираться с помощью запирающего устройства. Такое выполнение обеспечит надежную и безопасную эксплуатацию. 11 з.п. ф-лы, 7 ил.

ДВИГАТЕЛЬ ВНУТРЕННЕГО СГОРАНИЯ С ТУРБОНАДДУВОМ И СПОСОБ ЕГО ЭКСПЛУАТАЦИИ

Изобретение может быть использовано в двигателях внутреннего сгорания с турбонаддувом. Двигатель (1) внутреннего сгорания с турбонаддувом имеет по меньшей мере два турбокомпрессора (8, 9), по меньшей мере два цилиндра (3) и головку (2) цилиндров, выполненную с возможностью соединения с блоком цилиндров со стороны сборочного конца. Каждый цилиндр (3) имеет по меньшей мере два выпускных отверстия (4а, 4b) для вывода выхлопных газов. По меньшей мере одно из выпускных отверстий выполнено как задействуемое отверстие (4а). Каждое выпускное отверстие (4а, 4b) соединено с выхлопным трубопроводом (5а, 5b). Выхлопные трубопроводы (5а) задействуемых выпускных отверстий (4а) по меньшей мере двух цилиндров (3) соединяются друг с другом с образованием первого выпускного коллектора (6а) для формирования первого общего выхлопного трубопровода (7а), который соединен с турбиной (8а) первого турбокомпрессора (8) на выхлопных газах. Выхлопные трубопроводы (5b) других выпускных отверстий (4b) по меньшей мере ...

УСТРОЙСТВО МОТОРНОГО ТОРМОЗА 4-ТАКТНОГО ПОРШНЕВОГО ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ

Устройство моторного тормоза 4-тактного поршневого двс, который имеет в каждом цилиндре, по меньшей мере, один впускной клапан и два выпускных клапана и ориентируется целенаправленно на этот тип двигателя. В линию для отработавшего газа для торможения двигателя встроено дроссельное устройство, приводимое в действие таким образом, что перед дроссельным устройством возникает противодавление в скопившемся отработавшем газе, которое действует взаимосвязано со специальным, встроенным в двигатель тормозным устройством. Тормозное устройство согласовано только с одним из двух выпускных клапанов цилиндра, другой выпускной клапан напротив регулируется обычным образом. Тормозное устройство содержит распределительный поршень, встроенный в клапанную перемычку, который от снабженной маслом под давлением управляющей камеры сжатия и через дополнительную управляющую пружину сжатия давит в направлении выпускного клапана. Управляющая камера сжатия присоединяется к устройству постоянной подачи масла под давлением ...

Кулачковый механизм с толкателем

Механизм газораспределения для предкамерного двигателя внутреннего сгорания

Zylinderkopf für eine Brennkraftmaschine

EINRICHTUNG ZUR GLEICHZEITIGEN BETAETIGUNG ZWEIER GASWECHSELVENTILE EINER BRENNKRAFTMASCHINE

Ventilsteuerungseinrichtung in einer Brennkraftmaschine

Aktorik zum Schalten zumindest eines schaltbaren Schlepphebels für einen Ventiltrieb einer Brennkraftmaschine

Die Erfindung betrifft eine Aktorik zum Schalten zumindest eines schaltbaren Schlepphebels (1, 2) für einen Ventiltrieb einer Brennkraftmaschine, wobei ein entlang einer Achse (6) verschiebbar angeordnetes Schubelement (3) mit zumindest einem mit diesem axial verschiebbar verbundenen Schaltglied (7) vorgesehen ist, durch das jeweils eine axiale Stellbewegung zum Schalten zumindest eines Schlepphebels (1, 2) übertragbar ist, wobei das Schaltglied (7) axial elastisch ausgebildet und zur Abstützung desselben zumindest ein mit dem Schubelement (3) verbundenes Stützelement (10) vorgesehen ist, das einer beim Schalten am Schaltglied (7) angreifenden Gegenkraft (F) entgegenwirkend angeordnet ist.

Yoke assembly for motor cylinder valves comprise a unit to compensate valve free play and eliminate manual adjustments at the shafts

The yoke assembly, for the operation of the valves in an internal combustion motor, has a unit (20) to compensate for the free play at each valve shaft (4a,4b) held in the yoke (17a). A roller (16a) is fitted in the yoke to work with the operating arm (15a) of the valve rocker (9a). The yoke has an S-shape, fitted with channels for the lubrication of the free play compensation unit.

VORRICHTUNG ZUM STEUERN VON VENTILEN EINES VERBRENNUNGSMOTORS

Eine Vorrichtung 6 zum Steuern eines Hebens von Einlasstellerventilen wenigstens eines Brennraums 5 eines Verbrennungsmotors 2, wobei die Vorrichtung 6 Folgendes umfasst: einen ersten Kolben 8, der angeordnet ist, betätigt zu werden, um einen Hub eines ersten Einlasstellerventils 3 eines Brennraums 5 zu steuern, umfassend eine erste Betätigungsoberfläche 9 und eine zweite andere Betätigungsoberfläche 11; einen zweiten Kolben 13, der angeordnet ist, betätigt zu werden, um einen Hub eines zweiten Einlasstellerventils 4 des Brennraums 5 zu steuern, umfassend eine dritte Betätigungsoberfläche 14; und ein hydraulisches Steuersystem 7, das angeordnet ist, in Folgendem betrieben zu werden: einem ersten Modus, der ein gleichzeitiges Betätigen der ersten Betätigungsoberfläche 9 und der zweiten Betätigungsoberfläche 11, jedoch nicht der dritten Betätigungsoberfläche 14 bewirkt; und einem zweiten Modus, der ein gleichzeitiges Betätigen der ersten Betätigungsoberfläche 9 und der dritten Betätigungsoberfläche ...

Zweitakt-Brennkraftmaschine

Variable Ventilvorrichtung für einen Verbrennungsmotor

Variable Ventilvorrichtung für einen Verbrennungsmotor, gekennzeichnet durch: eine Nockenwelle, die drehbeweglich an einem Zylinderkopf des Verbrennungsmotors angeordnet ist, eine Kipphebelwelle, die so angeordnet ist, dass sie in dem Verbrennungsmotor oszillieren kann, einen stufenlos verstellbaren Kipphebelmechanismus, der durch eine an der Nockenwelle ausgebildete Nocke angetrieben wird, der ein Lufteinlassventil und/oder ein Auslassventil öffnet oder schließt und der einen Ventilhub stufenlos verstellbar macht; und einen Schaltkipphebelmechanismus, der durch die an der Nockenwelle ausgebildete Nocke angetrieben wird, der ein Lufteinlassventil und/oder ein Auslassventil öffnet oder schließt und der den Ventilhub stufenweise schaltet.

Brücke für einen Ventiltrieb einer Heavy-Duty-Brennkraftmaschine

Balkenartige Brücke (1) für einen Ventiltrieb einer Heavy-Duty-Brennkraftmaschine zur Übertragung eines Nockenhubes auf zwei gleichwirkende Gaswechselventile, mit einer Anlauffläche (2) für einen hebelartigen Nockenfolger an einer Ober- sowie zwei Ventilkontaktflächen (3) an einer Unterseite (4, 5) der Brücke (1), wobei die Ventilkontaktflächen (3) bei je einem Längsende (6) der Brücke (1) liegen und hierzwischen eine von der Unterseite (5) fest abstehende Führungssäule (7) zur teleskopartigen Führung der Brücke (1) auf einem Zylinderkopf der Brennkraftmaschine einfassen, dadurch gekennzeichnet, dass die Führungssäule (7) ein gegenüber der Brücke (1) separates Bauteil ist, welche Brücke (1) aus Stahlblech besteht und eine umgekehrt napfartige Geometrie mit einem Boden (8) und hiervon abhängenden Seitenwänden (9) hat, die bei den Längsenden (6) durch Querwände (10) verbunden sind, wobei die Führungssäule (7) aus einem Kopf (11) sowie einem demgegenüber im Durchmesser verringerten Stab (12 ...

Ventilbetätigungseinrichtung für eine Brennkraftmaschine

Actuating equipment for control of gas exchange valves and piston combustion engine, has lever, which is tilted at axle at cylinder head or is supported with components connected with cylinder head

The actuating equipment has a lever (1), which is tilted at an axle at a cylinder head or is supported with components connected with the cylinder head. A bridge (5) is provided, which has a concave contact area (4), and a pressurized element (2) is provided, which has a convex transmission surface (3).

Hydraulischer Ventil- und EVB-Spielausgleich

Eine Brennkraftmaschine (1) umfasst mindestens ein Auslassventil (3, 4) zum Abführen von Abgas aus mindestens einem Brennraum sowie eine Motorbremseinrichtung (2) mit einer hydraulischen Ventil-Zusatzsteuereinheit (22), mittels der das Auslassventil (3) bei betätigter Motorbremseinrichtung (2) in einer zwischengeöffneten Stellung haltbar ist. Weiterhin umfasst die Brennkraftmaschine (1) einen hydraulischen Ventilspielausgleichsmechanismus (45) für das Auslassventil (3, 4) und einen Ölkanal (59), der zur Ölspeisung der hydraulischen Ventil-Zusatzsteuereinheit (22) zwischen dieser und dem Ventilspielausgleichsmechanismus (45) ausgebildet ist, und der zum Ausgleichen eines Ventilspiels des Auslassventils (3, 4) mittels einer Verschlusseinheit (63) verschließbar ist.

Kipphebelanordnung

Cam shaft device for combustion engine of motor car, has two different gas shuttle valves that are associated with cam tracks having same valve opening durations, and different valve lift courses and gas exchange times

The cam shaft device has an axially displaceable cam element (10) for a valve lift, for simultaneous operation of two different gas shuttle valves (11) of a cylinder of the combustion engine. The combustion engine is provided with two cam tracks (12,13,19,20) having same valve opening durations. The different gas shuttle valves are associated with the cam tracks having different valve lift courses, and different gas exchange times.

Schaltbarer Schlepphebel eines Ventiltriebs

Die Erfindung betrifft einen schaltbaren Schlepphebel (1), der im Ventiltrieb eines Verbrennungsmotors zwischen mindestens einem Nocken einer Nockenwelle und dem Ventilschaft (9a, 9b) mindestens eines Gaswechselventils (8a, 8b) sowie mindestens einem an einem Motorgehäuse gelagerten Abstützelement (5a, 5b) angeordnet ist, und der einen Außenhebel (2) sowie einen Innenhebel (3) aufweist, wobei der Außenhebel (2) oder der Innenhebel (3) an einem Ende mindestens eine Aufnahme (4a, 4b) für einen Kopf (6a, 6b) des Abstützelementes (5a, 5b) und an dem anderen Ende mindestens eine Kontaktfläche (7) für den Ventilschaft (9a, 9b) eines Gaswechselventils (8a, 8b) aufweist, wobei der Außenhebel (2) und der Innenhebel (3) gelenkig miteinander verbunden sind, wobei der Außenhebel (2) oder der Innenhebel (3) über mindestens eine Anpressfeder in Richtung zu der Nockenwelle belastet ist, und bei dem der Außenhebel (2) sowie der Innenhebel (3) mittels einer Koppelvorrichtung miteinander koppelbar und entkoppelbar ...

Ventiltrieb für eine Brennkraftmaschine und Brennkraftmaschine

Ventiltrieb (10) für Gaswechselventile einer Brennkraftmaschine, wobei die Gaswechselventile ausgehend von mindestens einer Nockenwelle (11) ansteuerbar sind, wobei der Ventiltrieb (10) für jeweils zwei anzusteuernde Gaswechselventile jeweils einen Kipphebel (14) aufweist, wobei der jeweilige Kipphebel (14) mit einem ersten Ende (16) auf die jeweiligen beiden anzusteuernden Gaswechselventile über jeweils eine in einer Ventilbrückenführung (30) geführte Ventilbrücke (26) einwirkt. In die jeweilige geführte Ventilbrücke (26) für die jeweiligen beiden anzusteuernden Gaswechselventile sind zwei hydraulische Elemente (32a, 32b) zur Bereitstellung eines Ventilspielausgleichs und eines Ventilbrückenabgleichs für die jeweiligen beiden anzusteuernden Gaswechselventile integriert.

Brennkraftmaschine

Die Erfindung betrifft eine Brennkraftmaschine, umfassend wenigstens einen Zylinder, wenigstens eine untenliegende Nockenwelle und wenigstens ein hängendes Einlass- und wenigstens ein hängendes Auslassventil und wenigstens einen Kipphebelbock je Zylinder, wobei der Kipphebelbock eine insbesondere rohrförmige Achse aufweist, auf der wenigstens ein Auslasskipphebel und wenigstens ein Einlasskipphebel angeordnet sind.

Device for oil supply for hydraulic clearance compensating element of engine valve

The pressure oil reservoir (57,58) has an oil chamber (57a,58a) which is formed by the screw holes of the camshaft bearing cap extended as far as the oil supply race (38,39). A ventilation slot (24,25) is located in the bearing cap screw (48,50) and connects the oil chamber to the underside of the head of the bearing cap screw. The oil supply race delivers oil through a connecting line in the working position of the engine geodetically in the upper region of the oil reservoir.

VENTILSTEUERVORRICHTUNG

Vorrichtung im Zylinderkopf einer ventilgesteuerten Brennkraftmaschine

Vorrichtung im Zylinderkopf (10) einer Hubkolben-Brennkraftmaschine, mittels der zumindest eine im Zylinderkopf (10) über Nockenwellenlager (24, 24') drehbar gelagerte Nockenwelle (12) über eine an einer Stirnseite der Nockenwelle (12) angeordnete Verstelleinrichtung (38) relativ zu einem antreibenden Zahnrad (34) verstellbar ist, wobei die Verstelleinrichtung (38) ohne Zwischenschaltung eines herkömmlichen Nockenwellenlagers (24) unmittelbar so weit an einen ersten Nocken (16, 18) der Nockenwelle (12, 14) herangerückt ist und ein Nockenwellenlager (24') ausbildet, dadurch gekennzeichnet, dass das durch die Verstelleinrichtung (38) gebildete Nockenwellenlager (24') durch ein an einer Stirnseite (10b) des Zylinderkopfes (10) befestigtes Gehäuse (38d) der Verstelleinrichtung (38) gebildet ist, dass im Zylinderkopf (10) zwei Nockenwellen (12, 14) drehbar gelagert sind und ein weiteres antreibendes Zahnrad (36) auf der zweiten Nockenwelle (14) angeordnet ist, und dass das Gehäuse (38d) der ...

Hubvariables Ventilsystem für einen Verbrennungsmotor

Apparatus for moving at least one valve for a combustion chamber of an internal combustion engine

CYLINDER HEAD FOR A LIQUID COOLED INTERNAL COMBUSTION ENGINE

... 1365347 Cooling I C engines MASCHINENFABRIK AUGSBURG-NœRNBERG A G 2 Nov 1971 [6 Nov 1970] 50977/71 Heading F1B A cylinder head for a liquid cooled I. C. engine comprises a base-plate 10 of material capable of withstanding the high temperatures of the combustion chamber and provided with inlet and exhaust valve seats surrounded by cooling ducts 26, a supporting part 11 defining at least one exhaust valve guide 16 and an exhaust port 19 and an inlet port part 12 defining at least one inlet valve guide 20 and an inlet port being secured to the base-plate,the base-plate and the parts 11 and 12 being of different materials. The baseplate may be of steel, the part 11 of spheroidal graphite cast iron and the part 12 of aluminium alloy. The exhaust port 19 is cooled by liquid in ducts 28, but the inlet port is cooled by air in the space 29, which also houses fuel injection units.

IMPROVEMENTS IN CYLINDER HEADS FOR INTERNAL COMBUSTION ENGINES

... 1,256,401. I.C. engine cylinder heads; mounting spark-plugs. RUBERY, OWEN & CO. Ltd. June 11, 1970 [May 22, 1969], No. 26052/69. Heading F1B. A pair of inlet valves 11 and a pair of exhaust valves 12 are located on opposite sides of a plane which would contain the axis of the cylinder when the head is fitted to a cylinder and the axes of one pair of valves are located in a plane inclined at an angle between 5 degrees and 20 degrees to the plane containing the axes of the other pair. A tube 25 is inserted in the head between the valves to house a spark-plug 26. The inlet valves may be larger than the exhaust valves and the valves operated by respective cam-shafts 20 and 19 mounted in bearings on a carrier 21 bolted to the head. The inlet passages may be shaped to induce swirl in the gases entering the combustion chamber which may be formed partly in the piston crown. The tube 25 passes through a coolant space 28 and the spark-plug lead 36 is connected to the plug 26 by a spring 35 and a ...

FOUR VALVE PER CYLINDER ENGINE WITH SINGLE OVERHEAD CAMSHAFT

A compact four valve per cylinder overhead camshaft valve train arrangement for use with small cylinder bore engines is made possible by the mounting of a single overhead camshaft at a position high over the cylinder head and laterally offset from the cylinder bore centerline and adjacent a rocker arm shaft that is mounted on the cylinder bore centerline diagonally beneath the camshaft and in turn mounts a single forked lever type rocker arm for the simultaneous actuation of two exhaust valves, and a pair of individual axially spaced rocker arms directed to the opposite side of the rocker arm shaft for actuating a pair of intake valves, roller type cam followers being used to reduce friction, the arrangement providing access to the center of the cylinder bore for the mounting of a spark plug below and beneath the rocker arm shaft and between the intake valve rocker arms and the intake valves.

I.c. engine cam-in-block valve train with valves operated by individual pushrods actuated by a common cam follower

A multiple cylinder internal combustion engine 10, eg a vee engine with four valves per cylinder, has a valve train with a camshaft 12 disposed within an engine block 14 and cam followers 58, 58' pivotally mounted on a fixed shaft parallel to the camshaft 12. Each cam follower 58, 58' has a roller 64, 64' in contact with a cam lobe 70,70' and lifts two pushrods 56,56' to actuate gas exchange valves 28,28' via rocker arms 54,54'. For the right-hand cylinder of fig.1, the cam follower roller 64' is mounted in a housing 86' having a passage 61' to provide pressurized oil to a hydraulic lash adjuster 62' to adjust lash associated with the pair of pushrods 56'. Each valve thus has a dedicated lash adjuster in a common cam follower.

VALVE OPERATING MECHANISM IN INTERNAL COMBUSTION ENGINE

SOHC TYPE INTERNAL COMBUSTION ENGINE

INTERNAL COMBUSTION ENGINES

... 1368902 I C engine valve gear MITSUI SHIPBUILDING & ENG CO Ltd and JAPAN SHIPS MACHINERY DEVELOPMENT ASSOCIATION 29 Sept 1972 [30 Sept 1971 (2)] 45028/72 Heading F1B I.C. engine has suction and exhaust valves operated by mechanism having a cover and mounted on a cylinder head bolted to a cylinder block and is characterized in that the mechanism comprises a plurality of rocking arms pivotally supported by the cover, means for rocking the arms and rod means interposed between one end of the rocking arms and the associated valve stems, the rod means being permitted lateral movement relative to the valve stem. The engine comprises a cylinder 31, piston 32, cylinder head 1, inlet valve 5 and exhaust valve 6. A push rod operated rocker arm 19 actuates the inlet valve and is pivotally mounted on a shaft 17 supported by a cover 34. Above the valve stem 5a, is a rod 13 which is guided for movement parallel to the axis of the valve stem. At the upper end of the rod 13 there is an intermediate member ...

Improved Liquid-Cooled Cylinder Head for Internal Combustion Engines

... 1,166,678. Cylinder heads; precombustion chambers. MAYBACH MERCEDES-BENZ MOTORENBAU G.m.b.H. Dec.9, 1966 [Dec.10, 1965], No.55187/66. Heading FIB. A precombustion chamber 17 is mounted in a cage-like part 27 of the cylinder head which is reinforced by an intermediate horizontal wall 35 and a cylindrical vertical wall 39. Cooling water entering at 10, 11, flows through parts 40 in wall 39 towards the cage 27, through ports 37 to cool the chamber 17 and through outlets 38 into the cylinder head jacket with a main outlet 42. In an engine with six valves per cylinder, the cylinder head bolt supporting bosses (41, Fig.4, not shown) are integral with the wall 39 and extend up to wall 35. In an engine with four valves per cylinder Figs. 6 to 8 (not shown) ribs (56) are provided extending the whole height of the cylinder head.

Improvements in the Valve Gear Of Internal-combustion Engines.

... 100,266. Bugatti, E. April 15, 1915, [Convention date]. Valve-gear-Admission and exhaust valves a, b in the cylinder head, with their axes on a diameter of the cylinder, or pairs of such valves, are worked by cams on an overhead shaft c through levers f, j in the form of plates, the upper one of which is perforated for the passage of a boss i on the lower plate, which, in turn, is pierced for the spindles of the valves worked by the upper plate.

Improvements in Valve Arrangements for the Cylinders of Internal Combustion Engines.

... 103,785. Daimler Co., and Berriman, A. E. Sept. 14, 1916. Cylinders, arrangement of ports and igniters in. -Three admission valves 2 and three exhaust valves 1 are equidistantly arranged around the sparking-plug 3 in the cylinder end. The cylinder is otherwise constructed as described in Specification 103,960.

VALVE CONTROL DEVICE FOR IC ENGINE

CYLINDER HEAD,HAVING A PUMPING NOZZLE UNIT,FOR AN INTERNAL COMBUSTION ENGINE

Improvements in or relating to valves and valve gear of 4-stroke internal combustionengines

... 589,602. Valves and valve gear. NATIONAL GAS & OIL ENGINE CO., Ltd., SMITH, J., and JONES, J. July 11, 1944, No. 13260. [Classes 7 (ii) and 7 (vi)] In ,an engine in which the valves are duplicated, the inlet and exhaust valves 1, E alternate round the cylinder head and the inlet valves have shrouds a to promote swirl. Cam shafts D, F on each side of the engine operate the the valves by separate rockers. The inlet valve shrouds extend over an angle of about 60 degrees and swirl the charge in the same or opposite directions, and the passages leading to the valves may be arranged to assist the swirling. The valves are preferably fed by separate manifolds but there may be a single inlet or a single exhaust manifold. Specification 589,642 is referred to.

Internal combustion engine with four valves for each cylinder

... 960,396. Valve gear. A. C. SAMPIETRO. Jan 2, 1963 [Jan. 3, 1962], No. 280/63. Heading F1B. In an I.C. engine having spring-controlled poppet valves controlling two inlet ports 2, Fig. 1 and two exhaust ports 3 disposed on opposite sides of a central plane through the cylinders, a single camshaft 8, located above the cylinder parallel to the central plane, has two cams 11, 13 for each cylinder and two rocker arms 16, 31, Fig. 2 co-operate with each cam so that each cam operates an inlet valve and an exhaust valve in sequence. Each pair of cams act through rollers 41 on rockers 31 to open two inlet valves 15 and act through rollers 24 on rockers 16 to open two exhaust valves 14. Rockers 16 are pivoted on shaft 17 mounted in camshaft bearing lugs 7. A cam 12 operates fuel injector 44 mounted on rocker 13. In modifications the fuel injectors and exhaust valves are operated by rockers having spherical mating surfaces engaged by shafts which are rigidly secured to the cylinder head. In a further ...

An engine and valvetrain with dual pushrod lifters and independent lash adjustment

Apparatus for controlling valves using a hydraulic control system

BRENNKRAFTMASCHINE MIT MEHR ALS ZWEI VENTILEN JE ZYLINDER

DEVICE FOR A COMBUSTION ENGINE

INTERNAL-COMBUSTION ENGINE WITH AN ENGINE BRAKE MECHANISM

ZYLINDERKOPF

Die Erfindung betrifft einen Zylinderkopf (1) für eine Brennkraftmaschine, mit zumindest einem Zylinder (2), mit einer Ventiltriebanordnung (3) mit parallelem Ventilbild, wobei der Zylinderkopf zumindest zwei erste Gaswechselventile (4) und zumindest zwei zweite Gaswechselventile (5) aufweist, wobei zumindest ein erstes Gaswechselventil (4) über einen ersten Ventilhebel (12) und zumindest ein zweites Gaswechselventil (5) über einen zweiten Ventilhebel (15) durch eine Nockenwelle betätigbar sind, wobei der erste Ventilhebel (12) um eine erste Hebelachse (12a) und der zweite Ventilhebel (15) um eine zweite Hebelachse (15a) schwenkbar gelagert ist, und wobei erste Gaswechselventile (4) Einlassöffnungen (7) und zweite Gaswechselventile (5) Auslassöffnungen (9) des Zylinderkopfes (1) zugeordnet sind. Zur Erhöhung der Verwindungssteifigkeit ist vorgesehen, dass alle Ventilhebel (12, 15) im Wesentlichen flach in Bezug auf eine Ventilhebelmittelebene (12b, 15b) ausgebildet sind, wobei die Ventilhebelmittelebene ...

INTERNAL-COMBUSTION ENGINE

Valve gear for mehrzylindrige internal-combustion engines with double valves.

VALVE IMPULSE SYSTEM IN A FOUR-CYLINDER AN INTERNAL-COMBUSTION ENGINE WITH OBENLIEGENDEN VALVES

MEHRZYLINDRIGE DIESEL INTERNAL-COMBUSTION ENGINE WITH VARIABLE VALVE GEAR

INTERNAL-COMBUSTION ENGINE WITH A ONLY ONE OBENLIEGENDEN CAM SHAFT FOR THE MECHANICAL CONTROLLING OF THE EXHAUST VALVES AND FOR THE ELECTROHYDRAULICAL CONTROLLING OF THE INTAKE VALVES

BRENNKRAFTMASCHINE

The combustion engine has a hydraulic valve clearance input device (8) that is arranged in a transfer component (40,70) between a cam shaft and an exhaust valve (3). The valve clearance input device comprises a bordering piston (10) that is extended from a pressure chamber (9) over a relief valve (15) with a pressure depression of connectable relief spacer (14). A motor brake device is formed by the valve clearance input device. The exhaust valve is held open with the motor brake device during a motor brake phase.

BRENNKRAFTMASCHINE

The internal combustion engine has two outlet valves (5,6) per cylinder, which are actuated together through a valve actuating unit (2) by a cam shaft over a valve crosshead (4). The valve actuating unit has a valve clearance compensation unit (14) in the actuating path between the camshaft and the outlet valves. The former outlet valve is loaded by closing force and the latter outlet valve is loaded by other closing force in the direction of closed position. The former closing force is smaller than the latter closing force.

Variabler Ventiltrieb

A variable valve gear for adjusting inlet or exhaust valves of at least two cylinder banks of an internal combustion engine comprising a camshaft carrying cams, at least two pushrods for the transmission of a profile of the cams into a translatory movement for the actuation of inlet or exhaust valves, wherein a rotatable adjusting member is provided between the outside contour of the cam and the pushrod, wherein the actuating times of the inlet or exhaust valves on the at least two cylinder banks can be synchronously altered by rotation of the adjusting member.

ENGINE BRAKE DEVICE.

VALVE IMPULSE FOR AT LEAST TWO AT THE SAME TIME TO OPERATION OF STROKE VALVES FOR THE GAS CHANGE OF AN INTERNAL-COMBUSTION ENGINE

ZYLINDERKOPFSTRUKTUR FÜR EINE BRENNKRAFTMASCHINE

The cylinder head structure (1) for an internal combustion motor has a cylinder head housing (2) with at least one inlet channel (12) and outlet channel for each cylinder, each with their inlet/outlet valves. The valve operating mechanism is contained within a housing with the camshaft, fitted to the laying surface (8) at the cylinder head. A shaft is at the axis (5) of each cylinder for the component extending into each combustion zone, such as the fuel injector. Side surfaces (14) support the inlet and exhaust manifolds. The cylinder head structure (1) is in a modular construction for a unified cylinder head housing (2) to be fitted with a variety of valve drive housings.

EINSPRITZBRENNKRAFTMASCHINE

INTERNAL-COMBUSTION ENGINE

A SET OF CYLINDER HEADS WITH DESMODROMI VENTILBETÄTIGUNG FOR INTERNAL-COMBUSTION ENGINES

LIQUID-COOLED, POURED CYLINDER HEAD FOR A AIR-CONSOLIDATING INTERNAL-COMBUSTION ENGINE

ENGINE BRAKING APPARATUS

POPPET VALVE ASSEMBLIES

DEVICE FOR CONVERTING A ROTATIONAL DISPLACEMENT INTO A DISPLACEMENT BACK AND FORTH

Cylinder head, method for manufacturing same, and engine

A cylinder head and an overhead camshaft engine using the cylinder head. The cylinder head has a top surface (1), an inlet side surface (2), an exhaust side surface (3), a front end surface (4), and a rear end surface (5), a camshaft mounting base (6) and a rocker arm support mounting boss (7) being distributed on the top surface, and a through return passage (8) being provided between the front end surface and the rear end surface. The cylinder head has a first fuel straight channel (10) vertically extending downwards from the rocker arm support mounting boss and a second fuel straight channel (11) horizontally extending from the inlet side surface, the first fuel straight channel communicating with the second fuel straight channel and the second fuel straight channel communicating with the return passage. An L-shaped pipe (200) or an arc pipe (300) can be used to replace the first fuel straight channel and the second fuel straight channel. The cylinder head can make the structure of the ...

Improved internal combustion engine and working cycle

FOUR STROKE ENGINE HAVING BLOW-BY VENTILATION SYSTEM AND LUBRICATION SYSTEM

A four stroke internal combustion engine is disclosed having a lubrication system for circulating lubricant within the engine. The engine further includes a system for separating lubricant from blow-by gas within the crank case.

ENGINE BRAKING APPARATUS

VALVE OPERATING SYSTEM IN INTERNAL COMBUSTION ENGINE

A valve operating system in an internal combustion engine includes a switchover pin which is movable between an associatively operating position where adjacent ones of rocker arms are operated in association with each other, and an associative-operation releasing position where the associative-operation is released, the switchover pin receiving at axially opposite ends thereof a hydraulic pressure force acting toward the associatively operating position and a spring force acting toward the associative-operation releasing position, a cylindrical roller shaft which is fixed to one of the adjacent rocker arms, and into which the switchover pin is slidably fitted in response to the movement thereof toward the associatively operating position, and a roller rotatably carried on the roller shaft to come into rolling contact with a cam provided on a camshaft. In this valve operating system, at least one of axially opposite end surfaces of the roller shaft formed of a material harder than that of ...

FOUR-CYCLE ENGINE

To provide a four-cycle engine, in which a pair of intake valve ports openable/closable by respective intake valves and a pair of exhaust valve ports openable/closable by respective exhaust valves are provided in a cylinder head in such a manner as to be positioned on both sides of a first virtual plane containing the axial line of a cylinder bore and passing through an approximately central portion of a combustion chamber, and a pair of ignition plugs are mounted in the cylinder head, characterized by minimizing the degradation of a flame propagation condition even if there occurs accidental fire in either of both the ignition plugs. A pair of ignition plugs 80, which are disposed substantially symmetrically with respect to a second virtual plane 79 passing through the center of a combustion chamber 17R and being perpendicular to a first virtual plane 78, are mounted in a cylinder head 15R in such a manner as to have axial lines extending substantially in parallel to the first virtual ...

VALVE OPERATING MECHANISM IN AN INTERNAL COMBUSTION ENGINE

Valve operating apparatus for an internal combustion engine in which plural intake valves and exhaust valves are associated with each cylinder. The respective valves are operated in one engine-operating condition in response to the action of a first set of cams and in another engine-operating condition in response to the action of a second set of cams coupled to the first cam set. The cams operating the intake valves impart a different valve operating action than those operating the exhaust valves.

REFUSE VEHICLE BODY ASSEMBLY

A vehicle includes a chassis, a cab coupled to the chassis, a body coupled to the chassis rearward of the cab, a bracket, and a valve assembly. The body defines a compartment and includes a front wall. The bracket has an arm coupled to the front wall. The arm extends rearward of the front wall into the compartment. The valve assembly is coupled to the bracket such that at least a portion of the valve assembly is disposed within the compartment.

Valve Control Means

Mécanisme de distribution pour moteurs à explosions avec soupapes placées sur la culasse des cylindres.

Ventilsteuerung an Verbrennungskraftmaschinen.

Mécanisme de commande d'un écoulement de fluide.

Kipphebelsteuerung an Verbrennungsmotoren mit zwei Einlass- und zwei Auslassventilen pro Zylinder.

Einrichtung zur Betätigung von zwei parallel arbeitenden Ventilen

Ventilantriebseinrichtung an Brennkraftmaschinen

Ventilsteuerung an mehrzylindrigen Kraft- und Arbeitsmaschinen.

Testa per cilindri di motori endotermici, particolarmente a ciclo Diesel

Flüssigkeitsgekühlter Zylinderkopf einer Brennkraftmaschine

Zylinderkopf einer Brennkraftmaschine

Zylinderdeckel für flüssigkeitsgekühlte Brennkraftmaschinen

Flüssigkeitsgekühlter Zylinderdeckel von selbstzündenden Brennkraftmaschinen

VERBRENNUNGSMOTOR.

Ventilsteuerung für Brennkraftmaschinen

Flüssigkeitsgekühlter Zylinderkopf für Brennkraftmaschinen

VALVE GEAR AT A LIFTING CYLINDER INTERNAL-COMBUSTION ENGINE.

MECHANISM FOR THE CONTROLLING OF THE INTAKE VALVES OF A LOADED FOUR-CYCLE INTERNAL-COMBUSTION ENGINE.

Internal Combustion Engine and Method for its Work

Camshaft phaser position control system

A camshaft phasor control system for an engine includes a position control module. The position control module generates a position control signal based on a camshaft position command signal and a gain signal. A gain circuit generates the gain signal based on the position control signal and feeds the gain signal back to the position control module. The position control module positions a camshaftof the engine based on the gain signal.

Engine assembly with integrated exhaust manifold

An engine assembly may include an engine structure, exhaust valves supported by the engine structure and a camshaft supported by the engine structure and engaged with the exhaust valves. The engine structure may define first, second, third and fourth combustion chambers arranged in series and a plurality of exhaust ports, each in communication with a corresponding combustion chamber. The engine structure may also define a flange region defining a first exhaust gas outlet axially aligned with the second combustion chamber and a second exhaust gas outlet axially aligned with the third combustion chamber. The engine structure may define first and second exhaust passages that extend from the first and second exhaust ports, respectively, to the first exhaust gas outlet and third and fourth exhaust passages that extend from the third and fourth exhaust ports, respectively, to the second exhaust gas outlet.

Anti-rotation Roller Valve Lifter

A roller lifter for an internal combustion engine includes a cylindrical lifter body having a first end, a second end and a roller rotatably attached to the first end. The first end has a first diameter and the second end has a second diameter greater than the first diameter and a flat surface configured to engage a corresponding flat surface on an adjacent roller lifter and to prevent axial rotation of the roller lifter while in use. The roller lifter may further include a recess extending along a longitudinal axis from the second end toward the first end.

Engine assembly including cam phaser assembly aid pin

An engine assembly includes an engine structure, a camshaft supported on the engine structure, a first cam phaser coupled to a first axial end of the camshaft, and a locating pin. The camshaft includes a first shaft, a second shaft, a first cam lobe and a second cam lobe. The first shaft defines a first opening. The second shaft is supported within the first shaft and defines a second opening. The first cam lobe is located on and fixed for rotation with the first shaft. The second cam lobe may be located on the first shaft and fixed for rotation with the second shaft. During assembly, the first cam phaser is located on the camshaft and the locating pin may be inserted through the first and second openings to rotationally fix the first and second shafts. The first cam phaser is then secured to the camshaft.

Spark ignition four-stroke cycle engine

A second exhaust poppet valve 9 is provided in a portion of a combustion chamber expanded out of a main cylinder 1 . A valve cover 7 reciprocates within a sub-cylinder 4 and covers a bottom surface of the second exhaust poppet valve 9 . A first exhaust valve 10 and an intake poppet valve 11 are provided so as to face an upper surface of a piston 2 . After the second exhaust poppet valve 9 is opened and hot high-pressure burned gas starts to flow away, the first exhaust poppet valve 10 is opened. As a result, the temperature of the first exhaust poppet valve 10 is reduced and the compression ratio can be increased. Then, a work amount of the piston is increased. The increased work amount compensates an amount of cooling loss due to increasing a surface area of the combustion chamber.

Variable valve actuation apparatus, system, and method

A variable valve actuation system is disclosed. In one form a rocker is disclosed coupled with a valve stem at one end and a cam follower at the other end. The rocker is operable to pivot about a fixed axis. The cam follower is operable to be pivotally coupled with the rocker at one end of the cam follower. The cam follower includes a lower roller and an upper roller at its other end, each operable to engage cam lobes on separate cam shafts. In one form the cam follower includes a lower roller operable to follow a cam lobe on a lower cam shaft and an upper roller operable to follow a cam lobe on an upper cam shaft. The upper cam shaft and the lower cam shaft can have variable lobes. A spring can be used to bias the cam follower on the rocker.

Valve operating apparatus for internal combustion engine

Provided is a valve operating apparatus for an internal combustion engine that, with respect to a configuration including urging means that urges a transfer member that transfers an acting force of a cam to a valve, can facilitate manufacture of a support portion of the urging means and suppress an increase in the mass of the internal combustion engine. A first rocker arm is provided that is interposed between a main cam and a valve and that transfers an acting force of the main cam to the valve. A lost motion mechanism is provided that urges the first rocker arm in one direction. A holding member is provided that holds the lost motion mechanism. The lost motion mechanism is attached to a spark plug tube through the holding member.

Valve Control for at Least One of an Internal Combustion Engine

Valve control for at least one valve of an internal combustion engine, in which the movement of at least one cam ( 2 ) of a camshaft ( 3 ) can be transmitted to a valve stem ( 5 ) of the valve ( 1 ) by a transmission mechanism ( 4 ), the transmission mechanism ( 4 ) including at least one transmission element ( 7 ) which is mounted rotatably on an axis ( 6 ) and is preferably designed as a rocker arm ( 10 ) or drag lever and which is connected to the camshaft ( 3 ) via a contact element ( 8 ) arranged on the transmission element ( 7 ), the contact surface ( 19 ) of the contact element ( 8 ) and the circumferential surface ( 20 ) of the cam ( 2 ) having, at least in regions, curved and mutually corresponding contours in the axial direction ( 21 ), and the transmission element ( 7 ) being mounted axially moveably on an axial body ( 11 ) of the axis ( 6 ).

MECHANICALLY CONTROLLABLE VALVE OPERATING MECHANISM, AND MECHANICALLY CONTROLLABLE VALVE OPERATING MECHANISM ARRANGEMENT

A mechanically controllable valve operating mechanism includes a cylinder head, a camshaft, a transmission arrangement mounted to move in the cylinder head via a bearing device. A gas exchange valve has the transmission arrangement act thereon. A valve-lift adjusting device comprises a rotatable adjusting element with an eccentric element having two base points and a peak contour, and at least one further eccentric element. The valve-lift adjusting device acts on the transmission arrangement so that different valve-lift positions are settable. The transmission arrangement is connected to the valve-lift adjusting device and to the camshaft. The at least one further eccentric element of the rotating adjusting element is arranged so that at least two peak contours are provided so that, depending on a rotational angle α of the rotating adjusting element, the eccentric element or the at least one further eccentric element engage with the transmission arrangement. 114-. (canceled)15. A mechanically controllable valve operating mechanism comprising:a cylinder head;a bearing device;a transmission arrangement comprising an end surface, the transmission arrangement being mounted so as to be movable in the cylinder head via the bearing device;a gas exchange valve configured to have the transmission arrangement act thereon via the end surface of the transmission arrangement;a spring element;a valve-lift adjusting device comprising a rotatable adjusting element with an eccentric element having two base points and a peak contour, and at least one further eccentric element arranged in a circumferential direction, the valve-lift adjusting device being configured to act on the transmission arrangement counter to a pre-stressing force of the spring element so that different valve-lift positions are settable; anda camshaft;wherein, the transmission arrangement is operatively connected to the valve-lift adjusting device and to the camshaft, andwherein, the at least one further ...

Variably operated valve system for internal combustion engine

A variably operated valve system for an internal combustion engine, a valve stop mechanism ( 11 ) makes at least one of a pair of fulcrum members lost motion to stop open-and-closure drives for one of two engine valves per cylinder and a stop of open-and-closure drives for the one of the engine valves is inhibited, in a case where a lost motion quantity of the valve stop mechanism exceeds a predetermined value (M3).

Cylinder Head Configuration For Internal Combustion Engine

A cylinder head ( 10 ) for an internal combustion engine, having at least two inlet valves ( 20 ) associated with the or each combustion chamber, the inlet valves ( 20 ) being supported in the cylinder head ( 10 ) with their axes spaced from one another in a first direction, at least two exhaust valves ( 22 ) with their axes of reciprocation also spaced from one another in the first direction and at least two receiving formations for operating elements (such as a spark plug ( 38 ) and fuel injector ( 40 )), the receiving formations opening into the combustion chamber portion in a central region bounded by the heads of the valves, wherein the receiving formations are inclined to one another so as to diverge generally in the first direction as they extend away from the combustion chamber portion.

VALVE CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE

A valve control apparatus includes first and second engine valves; a first drive cam configured to rotate integrally with the drive shaft; a second drive cam provided on the drive shaft and configured to rotate integrally with the drive shaft; a swing cam configured to swing; a transmission mechanism configured to convert a rotation of the first drive cam into a swinging force and to transmit the swinging force to the swing cam; a first swing arm configured to open the first engine valve by a swing of the swing cam; a second swing arm configured to open the second engine valve by a rotation of the second drive cam; a control mechanism configured to vary a swing amount of the swing cam by varying an attitude of the transmission mechanism; and a connection changeover mechanism configured to connect and disconnect the first swing arm with/from the second swing arm. 1. A valve control apparatus for an internal combustion engine , comprising:a first engine valve biased in a closing direction of the first valve by a biasing force of a valve spring;a second engine valve biased in a closing direction of the second valve by a biasing force of a valve spring;a first drive cam provided on a drive shaft and configured to rotate integrally with the drive shaft, the drive shaft being configured to rotate in synchronization with a crankshaft;a second drive cam provided on the drive shaft and configured to rotate integrally with the drive shaft;a swing cam configured to swing;a transmission mechanism configured to convert a rotational motion of the first drive cam into a swinging force and to transmit the swinging force to the swing cam;a first swing arm configured to open the first engine valve by being pressed by a swing of the swing cam;a second swing arm configured to open the second engine valve by being pressed by a rotation of the second drive cam;a control mechanism configured to vary a swing amount of the swing cam by varying an attitude of the transmission mechanism; anda ...

ROCKER ARM ASSEMBLY FOR ENGINE BRAKING

An exhaust valve rocker arm assembly includes an exhaust rocker arm and a valve bridge operably associated with the rocker arm. The valve bridge includes a main body and a lever rotatably coupled to the main body. The main body is configured to engage the first exhaust valve, and the lever is configured to engage the second exhaust valve. 1. An exhaust valve rocker arm assembly selectively opening first and second exhaust valves and comprising:an exhaust rocker arm; anda valve bridge operably associated with the rocker arm and including a main body and a lever rotatably coupled to the main body, the main body configured to engage the first exhaust valve, and the lever configured to engage the second exhaust valve.2. The assembly of claim 1 , wherein the lever is coupled to the main body such that rotation of the lever and engagement of the second exhaust valve occurs without rotation of the main body.3. The assembly of claim 1 , wherein the main body includes an aperture claim 1 , the lever at least partially disposed within the aperture.4. The assembly of claim 3 , wherein the lever is rotatably coupled to the main body by a bridge pin extending through the main body.5. The assembly of claim 1 , wherein the lever includes an engagement surface claim 1 , an opposed side opposite the engagement surface claim 1 , and a stop flange extending therefrom claim 1 , wherein the engagement surface is configured to be engaged by an engine brake rocker arm claim 1 , the opposed side is configured to move upwardly against the main boy when the engagement surface is moved downward claim 1 , and wherein the stop flange is configured to selectively engage an edge of the main body that at least partially defines the aperture to limit downward movement of the lever.6. The assembly of claim 1 , further comprising a valve shoe rotatably coupled to the lever claim 1 , the valve shoe configured to engage the second exhaust valve.7. The assembly of claim 6 , wherein the valve shoe is ...

ENGINE VALVE ACTUATION SYSTEMS WITH LOST MOTION VALVE TRAIN COMPONENTS, INCLUDING COLLAPSING VALVE BRIDGES WITH LOCKING PINS

Systems for valve actuation in internal combustion engines provide configurations for collapsing valve train components, particularly collapsing valve bridges. Various configurations for locking a bridge piston to a bridge housing include substantially cylindrical locking pins that may be housed within a substantially cylindrical receptacles defined by a transverse bore in the bridge piston and actuated hydraulically and may include an actuating pin that interacts with the locking pins to synchronize motion and provide positive positioning within an annular recess in the bridge housing to lock or unlock the bridge piston for movement relative to the bridge housing. Various geometries for locking pins and actuating pins provide benefits of manufacturing, ease of assembly, alignment and reduced wear. 1. In an internal combustion engine comprising a valve train for actuating one or more engine valves , a device for controlling motion applied to the one or more engine valves , comprising:a housing disposed within the valve train, the housing including a housing bore and at least one housing locking surface;a piston disposed within the housing bore, the piston having a piston bore and at least one locking pin receptacle defined therein, the at least one locking pin receptacle having a cylindrical shape;a locking assembly for selectively locking the piston to the housing, the locking assembly comprising an actuator pin supported for movement within the piston bore and at least one respective locking pin disposed in the at least one locking pin receptacle, the actuator pin including an outer locking pin engagement surface adapted to support the at least one locking pin in an extended position, and an inner locking pin support surface adapted to support the at least one locking pin in a retracted position, whereby movement of the actuator pin causes the at least one locking pin to selectively engage or disengage the housing locking surface thereby selectively locking or ...

VARIABLE VALVE ACTUATION

The present invention provides for Variable Valve Actuation comprising a cam, a valve suitable to displace between a closed position and an open condition caused by said cam, and further comprising a main rocker arm suitable to swing over a fulcrum , mechanically interacting with said valve, by means of a guide profile, and wherein said cam interacts with said main rocker arm causing said valve displacement as a consequence of said main rocker arm swinging. The target is to prevent a valve brake due to the guide profile and enable higher system stiffness. Accumulator less designs are feasible with this system. 1. A Variable Valve Actuation (VVA) comprisinga cam (CS),a valve (V) suitable to displace between a closed position and an open condition caused by a rotation of said cam,and further comprising a main rocker arm (MA) suitable to swing over a fulcrum (F), mechanically interacting with said valve (V), by means of a guide profile (WV), and wherein said cam interacts slidingly or rollingly with said main rocker arm causing said valve displacement as a consequence of said main rocker arm swinging, adjusting means (SPT, PT) arranged to relative move said fulcrum with respect to said cam and/or', 'adjusting means (HI) interposed between said cam (CS) and said main rocker arm and arranged to modify said mechanical interaction., 'wherein said variable valve actuation is obtained by means of'}2. The VVA according to claim 1 , wherein said guide is shaped as a circumference arc provided of a spur (SPUR) claim 1 , in such a way to define a ramp valve displacement as a consequence of said swinging.3. The VVA according to claim 2 , wherein said main rocker arm is pre-charged by a home spring (SP) in order to press the main rocker arm towards or against the cam (CS).4. The VVA according to claim 3 , wherein said home spring is a spiral enslaved on said fulcrum (F) or is a spring interposed between said main rocker arm and a fixed point of a head of an engine including said ...

APPARATUS AND METHOD FOR VALVE TIMING IN AN INTERNAL COMBUSTION ENGINE

Apparatus for controlling valve timing in an internal combustion engine locates a first valve port in a first side of the engine cylinder and a second valve port in a second side of the engine cylinder. A first rotating valve disc and a second rotating valve disc are respectively disposed next to the first and second valve port. Each rotating valve disc includes a valve port. Each disc rotates in synchronism with the crankshaft to align its' port with the respective first and second valve ports. A variety of intake devices coupled to the first rotating valve disc control intake air flow into the engine cylinder, and a variety of exhaust devices coupled to the second rotating valve disc control exhaust gas flow from the engine cylinder. 1. Apparatus for controlling valve timing in an internal combustion engine , comprising:an engine block forming a crankcase open to a lower end of an engine cylinder, a crankshaft rotatingly disposed in the crankcase, and a piston disposed within the engine cylinder and reciprocatingly coupled to the crankshaft;a first fixed valve port formed in a first side of the engine cylinder and a second fixed valve port formed in a second side of the engine cylinder opposite the first side;a first rotating valve disc (RVD-1) and a second rotating valve disc (RVD-2) rotatably disposed on a hub adjacent each respective first and second fixed valve port formed in the engine cylinder; whereineach RVD-1 and RVD-2 respectively includes an inner valve port and rotates in synchronism with the crankshaft to align the inner valve port formed in the RVD-1 and the RVD-2 with the respective first and second fixed valve ports formed in the first and second sides of the engine cylinder;an intake device, coupled between a first conduit and the RVD-1, for controlling intake air flow into the engine cylinder; andan exhaust device, coupled between a second conduit and the RVD-2, for controlling exhaust gas flow from the engine cylinder.2. The apparatus of claim 1 ...

Hydraulic Drive for Accelerating and Braking Dynamically Moving Components

In order to ensure a simple, reliable and recuperative operation in a hydraulic drive () for accelerating and braking a gas exchange valve () of internal combustion engines or other reciprocating engines, it is proposed that a first pressure reservoir () for providing a first pressure pcomprises a restoring energy accumulator, preferably configured as a spring (), and at least one hydraulic base pressure reservoir (), which has a lower pressure pthan the first pressure reservoir (). In a connecting line () between the first hydraulic pressure reservoir () and the working cylinder (), a controllable opening () of a first valve () comprising at least one check valve () is arranged upstream or downstream in the flow path, which allows the pressure medium () to flow in the direction of working cylinder (), but prevents a backflow towards the pressure reservoir (). 2. The hydraulic drive according to claim 1 , characterized in that in a second connecting line between the first pressure reservoir and the working cylinder there is provided a controllable opening of a second valve comprising at least one claim 1 , preferably spring-loaded check valve claim 1 , which is arranged serially in the flowpath upstream claim 1 , within or downstream claim 1 , preventing a flow in a direction towards the working cylinder claim 1 , but allowing a backflow in a direction towards the pressure reservoir.3. The hydraulic drive according to claim 2 , characterized in that the drive comprises at least a second pressure reservoir with a pressure p claim 2 , and that the controllable opening of the second valve is connected with this second pressure reservoir instead of with the first pressure reservoir claim 2 , wherein the pressure (p) of the second pressure reservoir is preferably between the pressure of the hydraulic base pressure reservoir pand the first pressure pand is preferably chosen so low that the gas exchange valve can reliably swing back onto the valve seat during the closing ...

VALVE ACTUATION SYSTEM FOR ENGINE AND VALVE LIFTER AND ROCKER ARM FOR SAME

A valve actuation system for an engine includes a rotatable camshaft, an injector actuation linkage, and a valve actuation linkage. The valve actuation linkage includes a valve lifter, a valve pushrod, and a rocker arm. At least one of a rocker arm center plane defined by the valve rocker arm or a lifter roller center plane defined by the valve lifter is spaced an offset distance from a pushrod axis, providing an increased contact width between an injector roller in the injector actuation linkage and one of a plurality of cam lobes of the camshaft. The valve lifter includes a fork defining a center plane spaced an offset distance from a center axis of the valve lifter. A rocker arm includes a screw bore offset relative to a rocker arm center plane. 1. A valve actuation system for an engine comprising:a camshaft including a plurality of cam lobes and being rotatable about a camshaft axis;an injector actuation linkage including an injector lifter having an injector roller in contact with a first one of the plurality of cam lobes;a valve actuation linkage including a valve lifter defining a reciprocation axis, a pushrod seat centered on the reciprocation axis, and a lifter roller in contact with a second one of the plurality of cam lobes adjacent to the first one of the plurality of cam lobes;the valve actuation linkage further including a valve rocker arm structured to couple with an engine valve, and a valve pushrod coupled between the valve lifter and the valve rocker arm and in contact with the pushrod seat;the valve rocker arm defining a pivot axis and a rocker arm center plane extending through a center point of the pivot axis;the lifter roller defining a rotation axis and a lifter roller center plane extending through a center point of the rotation axis;the valve pushrod defining a pushrod axis extending through the valve pushrod, the valve lifter, and the valve rocker arm; andat least one of the rocker arm center plane or the lifter roller center plane is ...

SYSTEM AND METHOD FOR ROCKER ASSEMBLY

Systems and methods for an engine are provided. The engine includes a straight rocker shaft passing through each of a first rocker arm and a second rocker arm, the first rocker arm being shaped differently from the second rocker arm. 1. A system for an engine , the system comprising:a straight rocker shaft passing through a first rocker arm and a second rocker arm, the first rocker arm being shaped differently from the second rocker arm; anda rocker pedestal supporting the straight rocker shaft, the rocker pedestal including at least two pillars of equal height which are connected to each other via a bridge,wherein a first pillar of the at least two pillars supports a first portion of the straight rocker shaft extending between the first rocker arm and the second rocker arm, andwherein a second pillar of the at least two pillars supports a second portion of the straight rocker shaft extending beyond the second rocker arm.2. The system of claim 1 , wherein the first rocker arm has an inclined upper portion with a first opening formed directly below the inclined upper portion claim 1 , and the inclined upper portion is not perpendicular to a central axis of the first opening claim 1 , andwherein the second rocker arm has a straight upper portion with a second opening formed directly below the straight upper portion, and the straight upper portion is perpendicular to a central axis of the second opening.3. The system of claim 1 , wherein each rocker arm has a continuous upper section and an opening formed directly below the continuous upper section claim 1 , the continuous upper section of each rocker arm including a first end coupled to a pushrod claim 1 , and a second end coupled to a valve train.4. The system of claim 2 , wherein the straight rocker shaft passes through the first opening and the second opening.5. The system of claim 2 , wherein the first opening and the second opening each include a bush bearing configured to contact the straight rocker shaft.6. The ...

SWITCHABLE ROCKER ARM WITH PIVOT JOINT

A switchable rocker arm for valve deactivation is provided for a valve train of an internal combustion engine. The switchable rocker arm includes a cam lever assembly, a valve lever assembly, and a hydraulically actuated coupling assembly that is radially arranged between the cam lever and valve lever assemblies. The coupling assembly includes a shuttle pin, a locking pin with a round or flat locking interface, and optional shuttle pin and locking pin sleeves. In a first, locked position, the rotational motion of a camshaft is translated to linear motion of an engine valve. In a second, unlocked position, the cam lever assembly rotates about the valve lever assembly, facilitating valve deactivation. A pivot joint arranged between the cam lever and valve lever assemblies facilitates an arcuate lost motion of the cam lever assembly. An integrated arrangement for one or more lost motions springs offers packaging and functional advantages. 1. A switchable rocker arm comprising: a first rocker shaft bore at a first end;', 'a radial shuttle pin bore in fluid communication with the first rocker shaft bore; and,', 'a first curved surface concentric with the first rocker shaft bore;', 'a cam lever assembly having:', 'a cam interface end;', 'a radial locking pin bore; and,', 'a second curved surface rotationally guided by the first curved surface;, 'a valve lever assembly havinga coupling assembly, including a locking pin arranged to move longitudinally within the locking pin bore and a shuttle pin arranged to move longitudinally within the shuttle pin bore with a first end of the shuttle pin engaging a first end of the locking pin.2. The switchable rocker arm of claim 1 , further comprising a first rotational stop at a first end of the first curved surface and a second rotational stop configured within the valve lever assembly.3. The switchable rocker arm of claim 2 , wherein the second rotational stop is arranged at a first end of a third curved surface.4. The switchable ...

CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

Intake holes at the opposite ends are opened and closed by first intake valves. The middle intake hole is opened and closed by a second intake valve. A control device includes an intake variable valve device. First branch channels are connected to the intake holes and produce a normal tumble flow. A second branch channel is configured such that the flow rate of intake air passing through the middle intake hole is relatively greater on the side closer to the outer periphery of the combustion chamber. Where increasing the flow coefficient is given a higher priority, a three-valve drive mode is selected. Where the strength of the normal tumble flow is enhanced, a two-valve drive mode is selected. Where production of the normal tumble flow is reduced, a one-valve drive mode is selected. 1. A control device for an internal combustion engine that includes:a spark plug disposed at a combustion chamber top surface of a cylinder;a fuel injection valve configured to supply a fuel into the cylinder;three intake holes formed in the combustion chamber top surface, the area of a middle intake hole of the three intake holes being smaller than the sum of the areas of intake holes at opposite ends;at least one exhaust hole formed in the combustion chamber top surface;first intake valves configured to open and close the intake holes at the opposite ends;a second intake valve configured to open and close the middle intake hole;at least one exhaust valve configured to open and close the at least one exhaust hole;an intake variable valve device configured to separately control opening and closing of the first intake valves and opening and closing of the second intake valve; andan intake channel that includes first branch channels and a second branch channel, the first branch channels being connected to the intake holes at the opposite ends and being configured to produce a normal tumble flow that ascends on an intake side and descends on an exhaust side in the cylinder, and the second ...

ROCKER ARM ASSEMBLY

A combined exhaust and engine brake rocker arm assembly configured to selectively open first and second exhaust valves, includes a rocker arm body, an exhaust rocker arm assembly formed in the rocker arm body, and an engine brake rocker arm assembly formed in the rocker arm body and configured to operate in a collapse mode and a rigid mode. The exhaust rocker arm assembly is configured to selectively engage a valve bridge to open the first and second exhaust valves, and the engine brake rocker arm assembly is configured to selectively engage the valve bridge to open only the first exhaust valve. 111-. (canceled)12. The valve train assembly of claim 18 , wherein the exhaust rocker arm assembly comprises an exhaust capsule assembly disposed in a bore formed in the rocker arm body claim 18 ,wherein the exhaust capsule assembly comprises a plunger assembly and a stopper, the plunger assembly including a first plunger body and a second plunger body, wherein a chamber is defined between the first and second plunger bodies configured to receive a supply of fluid.13. The valve train assembly of claim 12 , wherein the stopper includes an annular bore formed therein claim 12 , and a lost motion biasing mechanism is at least partially disposed in the annular bore claim 12 , the lost motion biasing mechanism configured to bias the stopper and the plunger assembly away from an upper wall of the bore.14. The valve train assembly of claim 13 , wherein the stopper includes an annular groove formed therein claim 13 , the annular groove configured to selectively align with a fluid port fluidly coupled to the engine brake rocker arm assembly.15. The valve train assembly of claim 18 , wherein the engine brake rocker arm assembly comprises a brake capsule assembly disposed in a bore formed in the rocker arm claim 18 ,wherein the bore comprises a first bore and a second bore formed in the rocker arm, the brake capsule assembly comprising a brake plunger assembly disposed in the first ...

Module for a variable-lift valve train of an internal combustion engine

The disclosure relates to a preassembled module of a variable-lift valve train for an internal combustion engine. The module includes an electric linear actuator that lies on a top side of a base plate of the module. A slide plate, movable by the electric linear actuator by means of a linear guide, also lies on the top side of the base plate. A retaining wall extends under a bottom side of the base plate and has two actuation fingers. A free end of each actuation finger includes a contract surface for moving a coupling slide of a switchable rocker arm. In a region of an outer transverse side of the slide plate, a contact wall arranged in front of the electric linear actuator extends upward. The contact wall contacts an actuation pin of the electric linear actuator to move the slide plate in a longitudinal direction.

SELF-CONTAINED COMPRESSION BRAKE CONTROL MODULE FOR COMPRESSION-RELEASE BRAKE SYSTEM OF AN INTERNAL COMBUSTION ENGINE

A compression-release brake system for operating an exhaust valve of an engine during an engine braking operation. The compression-release brake system comprises a self-contained compression brake control module (CBCM) operatively coupled to the exhaust valve for controlling a lift and a phase angle thereof. The CBCM includes a casing defining an actuator cavity, a actuation piston disposed outside the casing so as to define an actuation piston cavity between the casing and the actuation piston, and a check valve provided between the actuation piston cavity and a compression brake actuator disposed in the actuator cavity. The actuation piston reciprocates relative to the casing. The compression brake actuator includes an actuator element and a biasing spring. The actuator element selectively engages the check valve when deactivated so as to unlock the actuation piston cavity and disengages from the check valve when activated so as to lock the actuation piston cavity. 1. A compression brake control module , in a compression-release brake system for operating at least one exhaust valve of an internal combustion engine during a compression-release engine braking operation , the compression brake control module operatively coupled to at least one exhaust valve for controlling a lift and a phase angle of said at least one exhaust valve , so as to maintain the at least one exhaust valve open during a compression stroke of the engine when the engine performs a compression-release engine braking operation , the compression brake control module comprising:a casing including a single-piece body, adapted for mounting within and fixedly engaging a bore within said engine, said casing including an internal actuator cavity;an actuation piston disposed outside the casing and within said bore so as to define a variable volume hydraulic actuation piston cavity between the casing and the actuation piston and an inner surface of said bore, the actuation piston reciprocating relative ...

VALVE OPENING/CLOSING DEVICE FOR ENGINE

The present disclosure provides a valve opening/closing device for an engine which opens/closes two valves by rotation of one cam. In particular, the valve opening/closing device may make a lever motion by rotation of a cam so as to open/close valves. The valve opening/closing device may include: a body portion adapted to which a valve gap control device is mounted and an axis of a lever motion is positioned; an extended portion extended from the body portion toward the valve; and two valve contact portions respectively protruded to both sides from the extended portion so as to function to push the two valves. 1. A valve opening/closing device of an engine configured to open and close valves by a cam , the valve opening/closing device comprising:a body portion to which a valve gap control device is mounted and an axis of a lever motion is positioned;an extended portion extended from the body portion toward the valves; andat least two valve contact portions respectively protruded to both sides from the extended portion so as to function to push the at least two valves, respectively.2. The valve opening/closing device of claim 1 , wherein the valve opening/closing device is supported on three points by one valve gap control device and two valves.3. The valve opening/closing device of claim 1 , further comprising a connecting portion formed to connect the at least two valve contact portions with each other.4. The valve opening/closing device of claim 3 , wherein both ends of the connecting portion are bent toward an upper direction so as to be connected with the at least two valve contact portions.5. The valve opening/closing device of claim 3 , wherein the at least two valve contact portions and the connecting portion are formed in flat.6. The valve opening/closing device of claim 1 , further comprising blocking protrusions protruded toward a lower direction from the at least two valve contact portions which are respectively protruded to the both sides. This ...

Bias mechanisms for a rocker arm and lost motion component of a valve bridge

Systems for actuating at least two engine comprise a valve bridge operatively connected to the at least two engine valves and having a hydraulically-actuated lost motion component. A rocker arm has a motion receiving end configured to receive valve actuation motions from a valve actuation motion source and a motion imparting end for conveying the valve actuation motions and hydraulic fluid to the lost motion component. The motion receiving end is biased toward the valve actuation motion source. A bias mechanism, supported by either the rocker arm, valve bridge or both, is configured to bias the motion receiving end of the rocker arm and the lost motion component into contact with each other. By maintaining such contact, the bias mechanism helps maintain the supply of hydraulic fluid from the rocker arm to the lost motion component.

SYSTEM COMPRISING AN ACCUMULATOR UPSTREAM OF A LOST MOTION COMPONENT IN A VALVE BRIDGE

Systems for actuating at least two engine valves comprise a valve bridge operatively connected to the at least two engine valves and having a hydraulically-actuated lost motion component. The lost motion component comprises a lost motion check valve disposed therein. A rocker arm has a motion receiving end configured to receive valve actuation motions from a valve actuation motion source and a motion imparting end for conveying the valve actuation motions and hydraulic fluid to the lost motion component. The rocker arm is in fluid communication with a hydraulic fluid supply. The systems also comprise an accumulator in fluid communication with the hydraulic fluid supply and disposed upstream of the lost motion check valve. In all embodiments, a fluid supply check valve may be disposed upstream of the accumulator and configured to prevent flow of hydraulic fluid from the accumulator back to the hydraulic fluid supply.

Method And Control System For Operating An Internal Combustion Engine

A method for operating an internal combustion engine with multiple cylinders. Each cylinder of the internal combustion engine includes at least one fuel injector, and each fuel injector is activated for opening and closing via a solenoid valve of the respective fuel injector. Structure-borne sound waves emitted by the fuel injectors and/or accelerations caused by the fuel injectors are detected by measurement. The structure-borne sound waves detected by measurement and/or the accelerations detected by measurement are evaluated, and based on the evaluation, characteristics of the fuel injectors are automatically determined. 1. A method for operating an internal combustion engine having multiple cylinders , wherein each cylinder comprises at least one fuel injector , comprising:activating each fuel injector to open and close a solenoid valve of a respective fuel injector;detecting by measurement at least one of structure-borne sound waves emitted by the fuel injectors and accelerations caused by the fuel injectors;evaluating the at least one of the structure-borne sound waves detected by measurement and the accelerations detected by measurement are evaluated; andautomatically determining, based on the evaluation, characteristics of the fuel injector.2. The method according to claim 1 , further comprising:comparing the detected at least one of the structure-borne sound waves and the accelerations with at least one of a respective reference value and among themselves,wherein based on this comparison characteristics of the fuel injectors are automatically determined.3. The method according to claim 1 , wherein the at least one of the structure-borne sound waves and the accelerations are detected with corresponding structure-borne sound wave sensors and acceleration sensors that are attached to assemblies coupled to the fuel injector in terms of structure-borne sound wave claim 1 , or are detected with structure-borne sound wave sensors claim 1 , which are directly ...

Continuous variable valve duration apparatus and engine provided with the same

A continuous variable valve duration apparatus may include a camshaft, a cam unit on which a cam is formed, wherein the camshaft is inserted into the cam unit, a guide bracket having an upper guide boss formed thereon, an internal wheel transmitting rotation of the camshaft to the cam unit, a wheel housing in which the internal wheel is rotatable inserted, wherein the wheel housing includes a guide shaft on which a guide screw thread is formed and the guide shaft is inserted into the upper guide boss to be movable, a worm wheel to which an internal screw thread engaging with the guide screw thread is formed therewithin, and to which an external screw thread is formed thereon, and a control shaft on which a control worm engaging with the external screw thread is formed.

VALVETRAIN PIVOT STAND ASSEMBLY HAVING MULTIFUNCTIONAL CAP

An internal combustion engine includes a valvetrain having a pivot stand assembly that includes rocker arm assemblies and a compound pivot stand including a cap that integrates camshaft journaling and rocker arm support. The cap includes an elongate cap body structured to bolt to a base to form a camshaft journal bore, and each of a first and a second shaft bore for receiving rocker arm pivot shafts to position the rocker arms at different pivot locations. The rocker arms may be structured to actuate gas exchange valves arranged in a diamond pattern. 1. An internal combustion engine , comprising:an engine housing having formed therein a plurality of combustion cylinders;a plurality of gas exchange valves for the plurality of combustion cylinders;a first rocker arm assembly coupled with at least one of the plurality of gas exchange valves and including a first rocker arm and a first rocker arm pivot shaft;a second rocker arm assembly coupled with at least one of the plurality of gas exchange valves and including a second rocker arm and a second rocker arm pivot shaft;a camshaft coupled with each of the first and the second rocker arm assemblies; anda compound pivot stand having formed therein a journal bore, and a journal bearing positioned in the journal bore and rotatably journaling the camshaft;the compound pivot stand further having formed therein a first shaft bore receiving the first pivot shaft to support the first rocker arm at a first pivot location, and a second shaft bore receiving the second rocker arm pivot shaft to support the second rocker arm at a second pivot location.2. The internal combustion engine of claim 1 , wherein the camshaft defines a camshaft axis claim 1 , and wherein the first shaft bore defines a first shaft bore axis at an outboard location and the second shaft bore defines a second shaft bore axis at an inboard location claim 1 , relative to the camshaft axis.3. The internal combustion engine of claim 2 , wherein the first rocker arm ...

Intake and Exhaust Valve System for an Internal Combustion Engine

In an internal combustion engine, first and second rotating members, one for the intake valve and one for the exhaust valve rotate next to the outside of an engine cylinder on opposite sides thereof when driven by a drive gear attached to the end of the engine's crankshaft. Each rotating member may include a ring gear having a valve port or aperture near its perimeter that cyclically aligns with a corresponding valve port formed through the cylinder wall near the top of the cylinder. A method of controlling valve timing comprises the steps of causing the rotating member containing the second valve port to periodically align in synchronism with the first port to control the passage of an air/fuel mixture and exhaust gases through the combustion cycles of the engine. 1. A valve system for an internal combustion piston engine having a crankshaft rotatably mounted in a crankcase portion of an engine block , and an engine cylinder formed within the engine block and open at a lower end thereof into the crankcase , comprising:a first port disposed through a side wall of the engine cylinder into an upper portion of the engine cylinder; anda second port disposed through a rotating port member along one radius of the rotating port member; whereinthe rotating port member is disposed to rotate alongside the side wall of the engine cylinder such that the second port and the first port are in a communicating alignment keyed to revolution of the crankshaft.2. The valve system of claim 1 , further comprising:at least one rotating drive member for coupling the rotation of the crankshaft to rotation of the rotating port member to control timing of the communicating alignment of the first and second ports.3. The valve system of claim 2 , wherein the at least one rotating drive member comprises:a ring gear attached to the crankshaft aligned with the axis of the crankshaft and having a plurality of gear teeth around the ring gear that mesh with corresponding teeth formed around the ...

SYSTEMS AND METHODS FOR COMBINED ENGINE BRAKING AND LOST MOTION EXHAUST VALVE OPENING

A combined dedicated braking and EEVO lost motion valve actuation systems for internal combustion engines provide subsystems for braking events and EEVO events on one or more cylinders. Various control strategies may utilize braking and EEVO capabilities to module one or more engine parameters, including aftertreatment temperature and engine load. 1. In an internal combustion engine having at least one cylinder and at least one respective exhaust valve associated with the at least one cylinder , a system for controlling motion of the at least one exhaust valve , comprising:a main event motion source associated with each of the at least one cylinder for providing main event motion to the respective at least one exhaust valve;an early exhaust valve opening (EEVO) motion source associated with each of the at least one cylinder for providing EEVO motion to the associated at least one exhaust valve;a main event valve train associated with each of the at least one cylinder for conveying main event motion and EEVO motion to the associated at least one exhaust valve;an EEVO lost motion component in at least one of the main event valve trains and adapted to absorb EEVO motion from the EEVO motion source in a first operational mode and adapted to convey EEVO motion from the EEVO motion source in a second operational mode;a braking motion source, separate from the main event motion source, associated with each of the at least one cylinder for providing braking event motion to the associated at least one exhaust valve; anda braking event valve train, separate from the main event valve train, associated with each of the at least one cylinder for conveying braking motion from the braking motion source to the associated at least one exhaust valve.2. The system of claim 1 , wherein the EEVO lost motion component comprises a valve bridge and a piston slidably disposed in the valve bridge.3. The system of claim 1 , wherein the main event motion source and the EEVO motion source ...

Hydraulic Drive for Accelerating and Braking Dynamically Moving Components

The aim of the invention is to ensure that a hydraulic drive () for accelerating and braking a gas exchange valve () of internal combustion engines or other reciprocating engines operates in a simple, reliable and recuperative manner. To this end, a first pressure tank () for providing a first pressure p, a restoring energy accumulator preferably embodied as a spring (), and at least one hydraulic basic pressure tank () having a lower pressure pthan the first pressure tank () are provided. A controllable opening () of a first valve () is arranged with at least one non-return valve () located upstream or downstream of the opening in the flow path, in a connection line () between the first hydraulic pressure tank () and the working cylinder (), said non-return valve allowing the pressure medium () to flow towards the working cylinder () but preventing it from flowing back towards the pressure tank (). In order to also initiate the closing movement or the braking of the gas exchange valve in a hydraulically simple and reliable manner, a controllable opening () of a second valve () is arranged in a second connection line () between the first pressure tank () and the working cylinder (), with a non-return valve () that prevents flow towards the working cylinder () but allows backflow towards the pressure tank (). 1. A hydraulic drive for accelerating and braking dynamically moving components , in particular valves in gas exchange controls of internal combustion engines and other reciprocating engines , wherein the hydraulic drive comprises the following:at least one component to be driven, in particular a valve, preferably a gas exchange valve or a plurality of gas exchange valves which can be actuated jointly via a valve bridge, of an internal combustion engine or another reciprocating engine;a working cylinder with comprising a pressure acting surface of a drive piston,{'sub': '1', 'at least one first pressure reservoir for providing a first pressure pof a hydraulic ...

Sliding cam system

A sliding cam system for an internal combustion engine. The sliding cam system includes a cam shaft and a cam carrier, arranged rotationally fixedly and axially movably on the cam shaft. The cam carrier including a first shifting gate and a second shifting gate. The sliding cam system includes a first actuator with an element able to move along a longitudinal axis of the cam shaft, especially a pin, which can be brought into contact with the first shifting gate for the axial movement of the cam carrier in a first direction. The sliding cam system includes a second actuator with an element able to move along the longitudinal axis of the cam shaft, especially a pin, which can be brought into contact with the second shifting gate for the axial movement of the cam carrier in a second direction which is opposite to the first direction.

Six-stroke cycle engine having scavenging stroke

A six-stroke cycle engine includes an intake passage including a downstream end connected to a combustion chamber and no throttle valve therein, and an exhaust passage including a catalyst and an upstream end connected to the combustion chamber. The six-stroke cycle engine includes a first valve configured to open and close the intake passage, a second valve configured to open and close the exhaust passage, a valve gear configured to operate the first valve and the second valve so that an intake stroke, a compression stroke, an expansion stroke, and an exhaust stroke are executed, in this order, and to operate only the first valve so that a scavenging intake stroke and a scavenging exhaust stroke are executed, in this order, following the exhaust stroke. The valve gear includes a variable valve mechanism configured to continuously change an opening and closing timing and a lift amount of the first valve.

CAMSHAFT ASSEMBLY

A camshaft assembly for a vehicle engine includes a camshaft member, a cam phaser and a cam nose. The camshaft member includes a front end and a rear end. The camshaft member may be configured to actuate at least one intake valve of a combustion chamber. The cam phaser affixed to the front end of the camshaft member while the cam nose may be disposed at the front end of the camshaft. The cam nose further includes a cam nose face with a curvilinear groove surrounding a central axis region of the cam nose. The curvilinear groove may be configured to engage with the cam phaser to prevent oil leakage out from the central axis region and/or to rotationally lock the cam phaser to the camshaft member. 1. A camshaft assembly for a vehicle engine , the camshaft assembly comprising:a camshaft member having a front end and a rear end, the camshaft member configured to actuate at least one intake valve of a combustion chamber;a cam phaser affixed to the front end of the camshaft member; anda cam nose disposed at the front end of the camshaft member, the cam nose having a cam nose face with an curvilinear groove surrounding a central axis region of the cam nose and configured to engage with the cam phaser and prevent oil leakage out from the central axis region.2. The camshaft assembly as defined in wherein the cam phaser further comprises an input gear and an output gear wherein the output gear is configured to drive the rotation of the camshaft member via at least an engagement between the cam phaser and the curvilinear groove.3. The camshaft assembly as defined in wherein the output gear is rotatably supported by the input gear.4. The camshaft assembly as defined in wherein the output gear face deforms upon engagement with the curvilinear groove.5. The camshaft assembly as defined in wherein the curvilinear groove further includes a curvilinear valley and a curvilinear protrusion formed on each side of the curvilinear valley.6. The camshaft assembly as defined in wherein the ...

ROCKER ARM ASSEMBLY

A valve train assembly includes a first exhaust valve, a second exhaust valve, and a valve bridge including a main body and a lever rotatably coupled to the main body, the main body configured to engage the first exhaust valve, and the lever configured to engage the second exhaust valve. An exhaust valve rocker arm assembly is configured to selectively open the first and second exhaust valves, the exhaust valve rocker arm assembly including an exhaust valve rocker arm with a hydraulic lash adjuster (HLA) assembly coupled thereto, the HLA assembly in contact with the valve bridge main body. An engine brake rocker arm assembly is configured to selectively open the second exhaust valve and including an engine brake rocker arm with a combined HLA and added motion capsule coupled thereto. The combined HLA and added motion capsule is configured to selectively engage and rotate the lever. 1. A valve train assembly comprising:a first exhaust valve;a second exhaust valve;a valve bridge including a main body and a lever rotatably coupled to the main body, the main body configured to engage the first exhaust valve, and the lever configured to engage the second exhaust valve;an exhaust valve rocker arm assembly configured to selectively open the first and second exhaust valves, the exhaust valve rocker arm assembly including an exhaust valve rocker arm with a hydraulic lash adjuster (HLA) assembly coupled thereto, the HLA assembly in contact with the valve bridge main body; andan engine brake rocker arm assembly configured to selectively open the second exhaust valve and including an engine brake rocker arm with a combined HLA and added motion capsule coupled thereto, the combined HLA and added motion capsule configured to selectively engage and rotate the lever to open the second exhaust valve.2. The valve train assembly of claim 1 , wherein the HLA assembly is in continuous contact with the valve bridge main body.3. The valve train assembly of claim 1 , wherein the combined ...

ROCKER ARM ASSEMBLY FOR ENGINE BRAKING

An exhaust valve rocker arm assembly selectively opening first and second exhaust valves includes an exhaust rocker arm, an engagement capsule, a valve bridge operably associated with the rocker arm and including a main body, and a hydraulic actuator assembly disposed at least partially within an aperture formed within the main body. The hydraulic actuator assembly includes a first piston body and a second piston body disposed at least partially within the aperture formed in the main body. The exhaust rocker arm is configured to engage the valve bridge main body to engage the first exhaust valve, and the engagement capsule is configured to engage the hydraulic actuator to engage the second exhaust valve. 1. An exhaust valve rocker arm assembly selectively opening first and second exhaust valves and comprising:an exhaust rocker arm;an engagement capsule;a valve bridge operably associated with the rocker arm and including a main body; anda hydraulic actuator assembly disposed at least partially within an aperture formed within the main body, the hydraulic actuator assembly including a first piston body and a second piston body disposed at least partially within the aperture formed in the main body;wherein the exhaust rocker arm is configured to engage the valve bridge main body to engage the first exhaust valve, and the engagement capsule is configured to engage the hydraulic actuator to engage the second exhaust valve.2. The exhaust valve rocker arm assembly of claim 1 , wherein the hydraulic actuator assembly further includes an outer housing claim 1 , the first piston body and the second piston body at least partially disposed within the outer housing and defining a central chamber therebetween configured to receive a fluid.3. The exhaust valve rocker arm assembly of claim 1 , wherein the hydraulic actuator assembly further comprises a biasing mechanism disposed between the first piston body and the second piston body.4. The exhaust valve rocker arm assembly of ...

Added Motion Dual Lift Rocker Arm

A rocker arm assembly comprises a first arm, a second arm, and a latch assembly. The first arm comprises a main cam interface end, a body comprising a shaft port configured to pivot on a rocker shaft, and a valve end configured to lift and lower when the main cam interface end is acted on by a cam lobe. The second arm is overlaid on the first arm. The second arm comprises a secondary cam interface end, a latch lip end, and a shell connecting the latch lip end and the secondary cam interface end. The shell is configured to pivot relative to the first arm. The latch assembly is mounted to the body. The latch assembly is configured to selectively latch and unlatch the first arm with respect to the second arm. 1. A rocker arm assembly , comprising: a main cam interface end;', 'a body comprising a shaft port configured to pivot on a rocker shaft; and', 'a valve end configured to lift and lower when the main cam interface end is acted on by a cam lobe;, 'a first arm, comprising a secondary cam interface end;', 'a latch lip end; and', 'a shell connecting the latch lip end and the secondary cam interface end, the shell configured to pivot relative to the first arm; and, 'a second arm overlaid on the first arm, the second arm comprisinga latch assembly mounted to the body, the latch assembly configured to selectively latch and unlatch the first arm with respect to the second arm.2. The rocker arm assembly of claim 1 , wherein the main cam interface end comprises a roller assembly.3. The rocker arm assembly of claim 1 , wherein the secondary cam interface end comprises a slider pad.4. The rocker arm assembly of claim 1 , wherein the latch assembly comprises:a latch housing;a pin; anda latch spring biased between the latch housing and the pin.5. The rocker arm assembly of claim 1 , wherein:the body further comprises a body spring pocket;the shell further comprises a shell spring pocket; andthe rocker arm assembly further comprises a spring biased against the shell spring ...

Externally Driven Interior Axial Cam

An axial cam with a plurality of followers mounted within its diameter drives the followers in both axial directions. The followers operatively actuate valves such as those of an internal combustion engine. The cam can be driven about its exterior perimeter, providing an axially compact embodiment. The phasing of select followers can be established by modifying the azimuth positions of those followers with the cam in operation. By providing the cam with a symmetric actuating profile its followers can be linked to alternately actuate same-function valves in different engine cylinders. 1. A system that operatively actuates a plurality of valves that provide for ventilation to at least one cylinder of an internal combustion engine , in which system:an axial cam that comprises a first contact face and a second contact face and a central cavity is both of, mounted and driven, to rotate about an axis;the central cavity borders the first contact face and proceeds between it and the axis to an open end, the first contact face facing axially away from the open end;a plurality of followers are mounted at respective azimuths about the axis, each follower driven in one axial direction by the first contact face and in the other axial direction by the second contact face;the followers are driven by the axial cam at timings distinct from one another and communicate their respective driven positions through the open end of the central cavity;and each follower by so communicating its driven position operatively actuates at least one valve.2. The system of in which the axial cam is driven by means that contact a perimeter of the axial cam claim 1 , a portion of which perimeter surrounds a portion of the central cavity in a plane normal to the axis.3. The system of in which one axial cam operatively actuates both of claim 1 , an exhaust valve and an intake valve claim 1 , for at least one cylinder of the internal combustion engine.4. The system of in which at least one follower is ...

ASSEMBLING STRUCTURE OF ENGINE AND VEHICLE

There is provided an assembling structure of an engine. An oil control valve unit is configured to control oil pressure in a variable valve timing device of the engine. The oil control valve unit is installed on a cylinder head. The cylinder head is assembled to a crankcase. An outer wall of the cylinder head is formed with an opening into which the oil control valve unit is partially inserted. A mating surface of the cylinder head and the crankcase is fastened by at least a pair of bolts spaced apart across the opening. 1. An assembling structure of an engine , in which a cylinder head on which an oil control valve unit configured to control oil pressure in a variable valve timing device of the engine is installed is assembled to a crankcase ,wherein an outer wall of the cylinder head is formed with an opening into which the oil control valve unit is partially inserted, andwherein a mating surface of the cylinder head and the crankcase is fastened by at least a pair of bolts spaced apart across the opening.2. The assembling structure of the engine claim 1 , according to claim 1 ,wherein a chain chamber for a cam chain configured to transmit power to the variable valve timing device is formed in the cylinder head and the crankcase, andwherein the opening is formed in the outer wall of the cylinder head such that the oil control valve unit passes through an inner side of the cam chain.3. The assembling structure of the engine claim 2 , according to claim 2 ,wherein an outside of the chain chamber is partitioned by the outer wall of the cylinder head and an outer wall of the crankcase in a width direction of the engine, andwherein the mating surface of the outer wall of the cylinder head and the outer wall of the crankcase is fastened by the pair of bolts.4. The assembling structure of the engine claim 2 , according to claim 2 ,wherein an inside of the chain chamber is partitioned by an inner wall of the cylinder head and an inner wall of the crankcase in a width ...

Variable valve control system having common valve and engine system having the same

A variable valve control system may include a variable valve mechanism having latching pins for performing variable valve lift by a pressure difference of oil, an oil control circuit block having a low-pressure oil line and a high-pressure oil line to control ON/OFF of the latching pins, and a rotation shaft valve having oil passages for switching the low-pressure oil line and the high-pressure oil line.

A DEVICE FOR CONTROLLING AT LEAST ONE VALVE IN AN INTERNAL COMBUSTION ENGINE

A device for actuating at least one valve in an internal combustion engine includes a camshaft arrangement including a hollow outer shaft and an inner shaft, which is concentrically mounted inside of the outer shaft to be pivotable relative to the outer shaft. A first cam lobe is mounted on one of the inner shaft and the outer shaft in a rotationally fixed manner and a second cam lobe is mounted on the other of the inner shaft and the outer shaft in a rotationally fixed manner. The device further includes a rocker arm arrangement including a first primary rocker arm, which is arranged to follow the first cam lobe and arranged to actuate a first valve when it follows the first cam lobe. The rocker arm arrangement further includes an auxiliary rocker arm, which is arranged to follow the second cam lobe. The auxiliary rocker arm is adapted to actuate the first primary rocker arm so that an opening tune of the first valve may be extended by the auxiliary rocker arm following the second cam lobe. 2. A device according to claim 1 , wherein the first cam lobe has a symmetrical shape with regard to a peak point of the first cam lobe.3206. A device according to claim 1 , wherein the first cam lobe ( has a continuously rounded contour.4. A device according to claim 1 , wherein the second cam lobe has a non symmetrical shape with regard to a peak point of the second cam lobe.5. A device according to claim 1 , wherein the second cam lobe has a substantially planar profile part.6. A device according to claim 5 , wherein substantially planar profile part has a first end and a second end claim 5 , which are at different lift heights.7. A device according to claim 1 , wherein the first cam lobe and the second cam lobe have different maximum lift heights.8. A device according to claim 1 , wherein the first cam lobe has a higher maximum lift height than the second cam lobe.9. A device according to claim 1 , wherein the damping arrangement comprises a hydraulic circuit.10. A device ...

REFUSE VEHICLE BODY ASSEMBLY

A vehicle includes a chassis, a cab coupled to the chassis, a body coupled to the chassis rearward of the cab, a bracket, and a valve assembly. The body defines a compartment. The body includes a bottom wall defining a horizontal plane and a front wall defining a vertical plane. The bracket has an arm that is coupled to and extends rearward from the front wall into the compartment at an angle such that the arm is neither parallel with the horizontal plane nor parallel with the vertical plane. The valve assembly is coupled to the bracket such that at least a portion of the valve assembly is disposed within the compartment. 1. A vehicle comprising:a chassis;a cab coupled to the chassis;a body coupled to the chassis rearward of the cab, the body defining a compartment, the body including a bottom wall defining a horizontal plane and a front wall defining a vertical plane;a bracket having an arm that is coupled to and extends rearward from the front wall into the compartment at an angle such that the arm is neither parallel with the horizontal plane nor parallel with the vertical plane; anda valve assembly coupled to the bracket such that at least a portion of the valve assembly is disposed within the compartment.2. The vehicle of claim 1 , wherein the front wall defines an aperture through which the valve assembly is accessible.3. The vehicle of claim 2 , wherein a portion of the valve assembly extends through the aperture.4. The vehicle of claim 2 , further comprising a removable panel coupled to the front wall claim 2 , the removable panel positioned to selectively enclose at least a portion of the aperture.5. The vehicle of claim 4 , further comprising:an engine; andan exhaust system coupled to the engine and configured to receive exhaust gasses from the engine;wherein the removable panel extends at least partially across the aperture to substantially isolate the valve assembly from the exhaust system.6. The vehicle of claim 1 , further comprising a conduit fluidly ...

VALVE BRIDGE ASSEMBLY

A valve bridge assembly includes a valve bridge; a first cavity formed towards a first end portion of the valve bridge; and a hydraulic lash adjuster (HLA) disposed within the first cavity for engaging a first valve stem. The HLA includes a first contact surface for engaging the first valve stem. The first contact surface is curved. 1. A valve bridge assembly for a valve train assembly , the valve bridge assembly comprising:a valve bridge;a first cavity formed towards a first end portion of the valve bridge; anda hydraulic lash adjuster (HLA) disposed within the first cavity configured to engage a first valve stem,wherein the HLA comprises a first contact surface configured to engage the first valve stem, andwherein the first contact surface is curved.2. The valve bridge assembly according to claim 1 , wherein the valve bridge assembly further comprises:a second contact surface at a second end portion of the valve bridge configured to engage a second valve stem, wherein the second contact surface is curved.3. The valve bridge assembly according to claim 2 , wherein the second curved contact surface is substantially part spherical.4. The valve bridge assembly according to claim 1 , wherein the curved first contact surface is substantially part spherical.5. A valve train assembly comprising the valve bridge assembly of .6. The valve train assembly according to claim 5 , further comprising a pivotally mounted first rocker arm configured to engage the valve bridge and to pivot in response to a rotating first cam to cause a first valve lift event in an engine cycle.7. The valve train assembly according to claim 5 , wherein the first valve event is an engine brake valve event. This application is a continuation of U.S. patent application Ser. No. 14/411,524, filed on Dec. 29, 2014, which is a U.S. National Stage application under 35 U.S.C. §371 of International Application No. PCT/EP2013/063787, filed on Jul. 1, 2013, which claims benefit to British Patent Application No. ...

DEVICE FOR CONTROLLING AT LEAST ONE VALVE IN AN INTERNAL COMBUSTION ENGINE

A gas valve actuation device for an internal combustion engine includes a first arrangement for actuating two gas valves in a first lift event, a second arrangement for selectively actuating a first one of the two gas valves in a second lift event, a fluid circuit for controlling actuation of the first gas valve in the second lift event, wherein the fluid circuit includes a first fluid circuit valve which is arranged to be controlled by the first actuation arrangement. 1. A gas valve actuation device for an internal combustion engine , wherein the device comprisesfirst means for actuating two gas valves in a first lift event,second means for selectively actuating a first one of the two gas valves in a second lift event,a fluid circuit for controlling actuation of the first gas valve in the second lift event,wherein the fluid circuit comprises a first fluid circuit valve, which is arranged to be controlled by the first actuation means,wherein the first fluid circuit valve is arranged to be open when the two gas valves are not actuated for the first lift event and closed when the two gas valves are actuated for the first lift event, for creating conditions for achieving an exact positioning of the second actuation means an engaged state thereof.2. A device according to claim 1 , wherein the second actuation means comprises the fluid circuit.3. A device according to claim 1 , wherein the first actuation means comprises a first rocker arm for actuating the two gas valves in the first lift event claim 1 , and the second actuation means comprises a second rocker arm for actuating the first one of the two gas valves in the second lift event.4. A device according to claim 3 , wherein the first fluid circuit valve comprises a moveably arranged control member claim 3 , which is arranged in such a way in relation to the first rocker arm that it may be moved by a movement of the first rocker arm for opening and claim 3 , closing the valve.5. A device according to claim 4 , ...

REMOVABLE VALVE BRIDGES AND VALVE ACTUATION SYSTEMS INCLUDING THE SAME

A system for actuating engine valves may include a valve bridge having a main event rocker interface portion, a first valve interface portion and a second valve interface portion extending in generally opposite directions from the main event rocker interface portion. The second valve interface portion may include an open end including a slot for receiving a bridge pin. The slot permits the valve bridge to be removed from the actuation system without removal of the main event rocker or other actuating components, such as an auxiliary rocker. The valve bridge can be removed from the valve train without requiring removal of other actuation system components, such as auxiliary rockers or main event rockers. A single valve bridge configuration can be used with different valve spans, which may occur among different cylinder sizes in a given engine family, or across different engine families. 1. A system for actuating at least one of two or more engine valves in an internal combustion engine , the system comprising:a main event rocker for actuating the two or more engine valves; a main event rocker interface portion for receiving motion from the main event rocker;', 'a first valve interface portion extending from the main event rocker interface portion and including a first valve interface for transmitting motion to a first one of the two or more valves;', 'a second valve interface portion extending from the main event rocker interface portion and including a second valve interface for transmitting motion to a second one of the two or more valves;', 'the second valve interface portion including an open end for permitting the valve bridge to be removed; and', 'a bridge pin cooperatively associated with the open end for engaging an auxiliary motion source., 'a valve bridge cooperating with the main event rocker for transmitting motion from the main event rocker to the two or more engine valves, the valve bridge including2. The system of claim 1 , wherein the auxiliary motion ...

AUTOMATIC LASH ADJUSTER FOR USE WITH HIGH COMPRESSION INTERNAL COMBUSTION ENGINES

A hydraulic lash adjuster for use in diesel engines including a cylinder head having a first valve, a second valve, and a valve bridge extending between and in contact with both the first valve and the second valve. Where the diesel engine includes a first rocker arm, and where at least one of the first valve and the second valve undergo an oil can valve deflection rate. The hydraulic lash is configured to selectively transmit force between the first rocker arm and the valve bridge, and where the hydraulic lash adjuster is normally in the open configuration, and where the hydraulic lash adjuster changes from the open configuration to a closed configuration at a critical velocity that is greater than the oil can valve deflection rate. 1) An internal combustion engine comprising:an engine block at least partially defining a cylinder;a piston at least partially positioned within the cylinder and configured to move with respect to the cylinder;a cylinder head coupled to the engine block and at least partially enclosing the cylinder, the cylinder head defining a first runner open to the cylinder and a second runner open to the cylinder;a first valve mounted to the cylinder head and configured to move between an open position, in which the first runner is in fluid communication with the cylinder, and a closed position, in which the first runner is fluidly isolated from the cylinder;a second valve mounted to the cylinder head and configured to move between an open position, in which the second runner is in fluid communication with the cylinder, and a closed position, in which the second runner is fluidly isolated from the cylinder;a valve bridge extending between and in contact with the first valve and the second valve;a first cam lobe with a profile corresponding to positive power operation;a second cam lobe with a profile corresponding to engine braking operation;a hydraulic lash adjuster is configured to selectively transmit force between the valve bridge and one of the ...

Hybrid valve train system

For a given cylinder in the engine having two intake valves and two exhaust valves, one of the intake valves is driven by a bucket tappet, while the other intake valve is actuated via a roller finger follower. Similarly, one of the exhaust valves is driven by a bucket tappet, while the other exhaust valve is actuated via a roller finger follower. The intake valves read inputs form an intake camshaft, and the exhaust valves read inputs from an exhaust camshaft.

VALVETRAIN WITH VARIABLE VALVE ACTUATION

A method of providing a rocker arm set for a valvetrain includes providing a first intake rocker arm, a second intake rocker arm and a first exhaust rocker arm. The first intake rocker arm is configured as a switching rocker arm for a first intake valve on a first cylinder. The second intake rocker arm is for a second intake valve on a second cylinder. The second rocker arm is configured to operate in a normal Otto cycle mode. The first exhaust rocker arm is provided for a first exhaust valve on the second cylinder. The first intake rocker arm operates in one of an LIVC or EIVC mode where the first intake rocker arm is configured to open or close at a different time compared to the second intake valve. The first exhaust rocker arm operates in a cylinder deactivation mode. 1. A method of providing a rocker arm set for a valvetrain , the method comprising:providing a first intake rocker arm configured as a switching rocker arm for a first intake valve on a first cylinder;providing a second intake rocker arm for a second intake valve on a second cylinder, the second rocker arm configured to operate in a normal Otto cycle mode;providing a first exhaust rocker arm for a first exhaust valve on the second cylinder; andwherein (i) the first intake rocker arm operates in one of a late intake valve closing mode (LIVC) and an early intake valve closing mode (EIVC), where the first intake rocker arm is configured to one of open and close at a different time compared to the second intake valve, and (ii) the first exhaust rocker arm operates in a cylinder deactivation mode.2. The method of wherein the first intake rocker arm operates in added motion and wherein the first intake rocker arm operates in LIVC wherein the first intake rocker arm closes the first intake valve later than the second intake valve.3. The method of where the first intake rocker arm operates in EIVC wherein the first intake rocker arm opens the first intake valve earlier than the second intake valve.4. The ...

HEAVY DUTY VARIABLE VALVE ACTUATION

A valvetrain assembly includes: a main exhaust rocker arm assembly having a first main exhaust rocker arm and a second main exhaust rocker arm; a first latch assembly that selectively moves between a first position in which the first and second main exhaust rocker arms are locked for concurrent rotation and a second position in which one of the first and second main exhaust rocker arms rotates relative to an other of the first and second main exhaust rocker arms; a secondary exhaust rocker arm assembly having a first secondary exhaust rocker arm and a second secondary exhaust rocker arm; a second latch assembly that selectively moves between a first position in which the first and second secondary exhaust rocker arms are locked for concurrent rotation and a second position in which one of the first and second secondary exhaust rocker arms rotates. 1. A valvetrain assembly , comprising:a main exhaust rocker arm assembly having a first main exhaust rocker arm and a second main exhaust rocker arm;a first latch assembly configured to selectively move between a first position wherein the first and second main exhaust rocker arms are locked for concurrent rotation and a second position wherein one of the first and second main exhaust rocker arms is configured to rotate relative to an other of the first and second main exhaust rocker arms;a secondary exhaust rocker arm assembly having a first secondary exhaust rocker arm and a second secondary exhaust rocker arm;a second latch assembly configured to selectively move between a first position wherein the first and second secondary exhaust rocker arms are locked for concurrent rotation and a second position wherein one of the first and second secondary exhaust rocker arms is configured to rotate relative to an other of the first and second secondary exhaust rocker arms; and an actuator configured to rotate an exhaust cam rod that includes a first cam and a second cam thereon;', 'a main arm configured to rotate based upon ...

VALVE TRAIN FOR AN ENGINE

A valvetrain for an engine includes a pair of valves that are disposed in a spaced apart relation to one another, and in which each of the valves has an elongated valve stem. The valvetrain further includes a valve bridge that is coupled to the pair of valves. The valve bridge is configured to define a pair of receptacles to at least partly receive the pair of valve stems therein. The valve bridge further defines a central recess that is located midway between the pair of receptacles and disposed in a co-planar relationship with the pair of receptacles. 1. A valvetrain for an engine , the valvetrain comprising:a pair of valves disposed in a spaced apart relation to one another, each of the valves having an elongated valve stem;a valve bridge coupled to the pair of valves, the valve bridge configured to define a pair of receptacles to at least partly receive the pair of valve stems therein, the valve bridge further defining a central recess located midway between the pair of receptacles and disposed in a co-planar relationship with the pair of receptacles.2. The valvetrain of further comprising a rocker arm rotatably supported on a rocker shaft and disposed away from the central recess of the valve bridge claim 1 , the rocker arm having a contact element depending downwardly from an end of the rocker arm.3. The valvetrain of further comprising a hydraulic lash adjuster being slidably received in the central recess of the valve bridge claim 2 , the hydraulic lash adjuster having a first end being adapted to abut with a counterbored face of the valve bridge located adjacent to the central recess and a second end being adapted to operatively abut with the contact element of the rocker arm respectively.4. The valvetrain of claim 3 , wherein the positioning of the central recess midway between the pair of receptacles facilitates an axial abutment of the contact element with the second end of the hydraulic lash adjuster such that the valve bridge is configured to ...

VALVE OPERATING SYSTEM

A valve operating system for an internal combustion engine in which two valves are simultaneously operated by one valve bridge. The valve operating system includes two valves each having a valve stem end; a rocker arm having a forward end, the forward end having a contact surface; and a valve bridge that operates the two valves. The valve bridge includes first and second ends each having an internal sleeve adapted to receive the respective stem end of each valve, a central reservoir, and a roller operably recessed within the central reservoir which is in contact with the contact surface of the rocker arm during actuation. The presence of the roller during operation mitigates the transverse force created by the rotation of the rocker arm upon the valve bridge, thereby increasing efficiency and minimizing wear on the engine. 1. A valve operating system for an internal combustion engine in which two valves are simultaneously operated , each having a valve stem , comprising:(a) a rocker arm having a forward end, the forward end having a contact surface; and i) first and second ends each having an internal sleeve adapted to receive the respective stem end of each valve;', 'ii) a central reservoir; and', 'iii) a roller having a curved surface operably recessed within the central reservoir in contact with the contact surface of the rocker arm, whereby downward movement of the rocker arm actuates the valve bridge without a transverse force increasing efficiency and minimizing wear on the engine., '(b) a valve bridge that operates the two valves, the valve bridge comprising2. The valve operating system of claim 1 , wherein central reservoir is adapted to retain and provide oil to the roller during operation of the valves.3. The valve operating system of claim 2 , wherein the central reservoir comprises a concave surface which partially extends radially about the curved surface of the roller forming a space therebetween for oil to collect and to apply to the roller during ...

LOST MOTION ASSEMBLY IN A VALVE BRIDGE FOR USE WITH A VALVE TRAIN COMPRISING A HYDRAULIC LASH ADJUSTER

In an internal combustion engine comprising two or more engine valves that receive valve actuation motions from a valve actuation motion source via a valve train, which valve train comprises a hydraulic lash adjuster, an apparatus for valve actuation comprises a valve bridge and a lost motion assembly disposed therein. The lost motion assembly comprises a first piston disposed in a first piston bore formed in the valve bridge. The first piston is configured to operatively connect with a component of the valve train. A biasing element is configured to bias the first piston out of the first piston bore with a first force that is greater than a second force applied to the first piston by the hydraulic lash adjuster. A travel limiter is configured to limit travel of the first piston out of the first piston bore to be no greater than a maximum lost motion distance. 1. An apparatus for actuating at least one of two or more engine valves in an internal combustion engine , comprising:a valve bridge operatively connected to the two or more engine valves; anda hydraulically-actuated lost motion assembly disposed in the valve bridge, the hydraulically-actuated lost motion assembly comprising:a first piston disposed within a first piston bore formed in the valve bridge and configured to operatively connect with the valve train;a first biasing element configured to bias the first piston out of the first piston bore, the first biasing element further configured to provide a first force to the first piston that is greater than a second force applied to the first piston by a lash adjuster; anda travel limiter configured to limit travel of the first piston out of the first piston bore,wherein the lash adjuster is disposed upstream of the hydraulically-actuated lost motion assembly in a valve train configured to be operatively connected to a valve actuation motion source and to the valve bridge.2. The apparatus of claim 1 , wherein the first piston comprises an internal cavity ...

CONTINUOUS VARIABLE VALVE LIFT APPARATUS AND ENGINE PROVIDED WITH THE SAME

A continuously variable valve lift apparatus may include a camshaft, a cam portion on which a cam is formed and into which the camshaft is inserted, a slider housing into which the cam portion is rotatably inserted and disposed to be rotatable around a pivot shaft, a control portion configured to selectively rotate the slider housing around the pivot shaft, a rotation deliverer configured to transmit rotation of the camshaft to the cam portion, an output portion rotatable around the pivot shaft and on which a valve shoe is formed, and a valve device configured to be driven by the valve shoe. 1. A continuously variable valve lift apparatus comprising:a camshaft;a cam portion on which a cam is formed and into which the camshaft is inserted;a slider housing into which the cam portion is rotatably inserted and disposed to be rotatable around a pivot shaft;a control portion configured to selectively rotate the slider housing around the pivot shaft;a rotation deliverer configured to transmit rotation of the camshaft to the cam portion;an output portion rotatable around the pivot shaft and on which a valve shoe is formed; anda valve device configured to be driven by the valve shoe.2. The continuously variable valve lift apparatus of claim 1 , wherein the rotation deliverer comprises:an inner plate connected to the camshaft and from which a control pin protrudes; andan outer plate on which a control slot where the control pin movable therein is formed, and configured to transmit rotation of the inner plate to the cam portion.3. The continuously variable valve lift apparatus of claim 2 , wherein the rotation deliverer further comprises a rotation housing formed to the cam portion claim 2 , andwherein the outer plate is connected to the rotation housing.4. The continuously variable valve lift apparatus of claim 2 , wherein:a stopper protrudes from the inner plate; anda stopper slot is formed to the outer plate for limiting movement of the stopper.5. The continuously variable ...

Continuous variable valve lift apparatus and engine provided with the same

A continuously variable valve lift apparatus may include a camshaft, a cam portion on which two cams are formed and on which a rotation member is formed between the cams, a slider housing into which the rotation member is rotatably inserted, and rotatable around a pivot shaft, a control portion configured to selectively change a position of the slider housing, an output portion contacting the cams, rotatable around the pivot shaft and on which a valve shoe is formed, and a valve device configured to be driven by the valve shoe.

CONTINUOUS VARIABLE VALVE DURATION APPARATUS AND ENGINE PROVIDED WITH THE SAME

A continuous variable valve duration system may include a camshaft, a first cam portion including a first cam, into which the camshaft is inserted and of which a relative phase angle of the first cam with respect to the camshaft is variable, a rocker shaft disposed parallel to the camshaft, a first rocker arm rotatably disposed to the rocker shaft of which a first end contacts with the first cam and a second end is connected to a first valve, an inner bracket to transmit rotation of the camshaft to the first cam portion, a slider housing into which the inner bracket is rotatably inserted, on which a control hole is formed and on which a guide portion is formed for guiding movement of the slider housing, an eccentric shaft inserted into the control hole, and a control portion to selectively rotate the eccentric shaft. 1. A continuous variable valve duration system comprising:a camshaft;a first cam portion including a first cam, into which the camshaft is inserted and of which a relative phase angle of the first cam with respect to the camshaft is variable;a rocker shaft disposed parallel to the camshaft;a first rocker arm rotatably disposed to the rocker shaft of which a first end contacts with the first cam and a second end is connected to a first valve;an inner bracket configured to transmit rotation of the camshaft to the first cam portion;a slider housing into which the inner bracket is rotatably inserted, on which a control hole is formed and on which a guide portion is formed for guiding movement of the slider housing;an eccentric shaft inserted into the control hole; anda control portion configured to selectively rotate the eccentric shaft for the slider housing to be moved.2. The continuous variable valve duration system of claim 1 , wherein first and second slots are formed to the inner bracket claim 1 ,wherein the first cam portion comprises a wheel on which a wheel key is formed and connected to the first cam, and a connecting pin connected to the camshaft ...

ENGINE HAVING VARIABLE VALVE TIMING DEVICE AND VARIABLE TUMBLE DEVICE

An engine having a variable valve timing device and a variable tumble device, may include the variable valve timing device advancing or delaying a rotation of an intake camshaft or an exhaust camshaft, an intake valve or an exhaust valve configured to be operated by the intake camshaft or the exhaust camshaft respectively to open and close an intake port or an exhaust port, and the variable tumble device that may be disposed on an upstream side of the intake valve in the intake port and changes a flow of a gas being suck to form a tumble in a combustion chamber. 1. An engine having a variable valve timing device and a variable tumble device , including:the variable valve timing device advancing or delaying a rotation of an intake camshaft or an exhaust camshaft;an intake valve or an exhaust valve configured to be operated by the intake camshaft or the exhaust camshaft respectively to open and close an intake port or an exhaust port; andthe variable tumble device that is disposed on an upstream side of the intake valve in the intake port and changes a flow of a gas being suck to form a tumble in a combustion chamber.2. The engine having the variable valve timing device and the variable tumble device of claim 1 , wherein the variable tumble device includes:a first tumble arm having a first end rotatably coupled to a hinge and extending into the intake port in a flow direction of the gas suck by the intake port;a second tumble arm integrated with a second end of the first tumble arm and being extended from the first tumble arm in the flow direction of the gas that flows through the intake port; anda driver coupled to the first tumble arm and selectively rotating the first tumble arm around the hinge.3. The engine having the variable valve timing device and the variable tumble device of claim 1 , wherein the variable valve timing device is disposed to correspond to the intake camshaft to delay a rotation of the intake camshaft and to reduce a valid compression ratio.4. ...

ROCKER ARM ASSEMBLY FOR ENGINE BRAKING

An exhaust valve rocker arm assembly selectively opening first and second exhaust valves. The assembly includes an exhaust rocker arm and a valve bridge operably associated with the rocker arm and including a main body and a lever rotatably coupled to the main body. The main body is configured to engage the first exhaust valve, and the lever is configured to engage the second exhaust valve. 1. An exhaust valve rocker arm assembly selectively opening first and second exhaust valves and comprising:an exhaust rocker arm; anda valve bridge operably associated with the rocker arm and including a main body and a lever rotatably coupled to the main body, the main body configured to engage the first exhaust valve, and the lever configured to engage the second exhaust valve.2. The assembly of claim 1 , wherein the lever is disposed at least partially within the main body.3. The assembly of claim 2 , wherein the lever is disposed between opposed flanges of the main body.4. The assembly of claim 1 , wherein the valve bridge main body is configured to have an interference fit with a valve tip of the first exhaust valve.5. The assembly of claim 4 , further comprising a hydraulic lash adjuster (HLA) assembly coupled between the exhaust rocker arm and the valve bridge claim 4 , wherein the interference fit is configured to transfer relative motion to the HLA assembly and the second exhaust valve.6. The assembly of claim 1 , further comprising a valve shoe rotatably coupled to the lever.7. The assembly of claim 6 , wherein the valve shoe is rotatably coupled to the lever by a valve shoe pin extending through the lever.8. The assembly of claim 7 , wherein the valve shoe is configured to have an interference fit with a valve tip of the second exhaust valve.9. The assembly of claim 8 , further comprising a hydraulic lash adjuster (HLA) assembly coupled between the exhaust rocker arm and the valve bridge claim 8 , wherein the interference fit is configured to transfer relative motion ...

ENGINE CONTROL DEVICE

A engine control device includes an variable exhaust valve mechanism which varies an opening and closing timing of an exhaust valve , and a PCM which controls the variable exhaust valve mechanism such that the opening and closing timing of the exhaust valve is varied, wherein the variable exhaust valve mechanism is configured such that a lift amount of the exhaust valve becomes smaller as a retarded degree of the valve opening timing increases, and the PCM is configured to set a maximum retarded valve opening timing in an exhaust stroke based on the lift amount at an exhaust top dead center, and to control the variable exhaust valve mechanism so as to open the exhaust valve in advance of the maximum retarded valve opening timing. 1. An engine control device having a cylinder provided with an intake valve for introducing an intake gas into the cylinder , and an exhaust valve for discharging exhaust gas from the cylinder , the engine control device comprising:a variable valve mechanism configured to move the exhaust valve, and to vary an opening and closing timing of the exhaust valve; anda control device configured to control the variable valve mechanism such that the opening and closing timing of the exhaust valve is varied,wherein the variable valve mechanism is configured such that a lift amount of the exhaust valve becomes smaller as a retarded degree of the valve opening timing of the exhaust valve with respect to a predetermined reference timing increases, andwherein the control device is configured, based on a lift amount of the exhaust valve at an exhaust top dead center, to set a maximum retarded valve opening timing which is a timing at which the valve opening timing of the exhaust valve in an exhaust stroke is retarded to a maximum by the variable valve mechanism, and to control the variable valve mechanism so as to open the exhaust valve in advance of the maximum retarded valve opening timing.2. The engine control device according to claim 1 , wherein the ...

Valve actuation system

A valve actuation system is disclosed for use with an internal combustion engine. The valve actuation system may have a rocker shaft, a rocker arm pivotally mounted on the rocker shaft, at least one cam follower and a pushrod connecting the at least one cam follower to the rocker arm. The valve actuation system may also have a plurality of gas exchange valves, and a bridge connecting the rocker arm to the valves. The valve actuation system may further have at least one spring disposed around each of the valves and configured to bias each of the valves toward closed positions, and a rotocoil configured to rotatably connect the at least one spring to each of the valves. The rotocoil may have an internal chamfer at a bridge end with an angle of about 26-28°. The at least one spring may have an assembled load of about 750-850 N.

Device for a valve train for switching over the lift of gas-exchange valves of an internal combustion engine

A device for a valve train for switching over the lift of gas-exchange valves of an internal combustion engine comprising a camshaft on which at least one cam carrier with at least three different cam profiles is mounted so as to be non-rotatable and axially movable. The device includes an adjustment shaft arranged parallel to the camshaft and on which a first transmission element is mounted so as to be non-rotatable and axially movable, the first transmission element having a guide unit, a housing-fixed first guide element operatively connected to the guide unit, a second guide element operatively connected, on the one hand, to the guide unit and, on the other hand, to the cam carrier via a second transmission element, the second transmission element being connected to the cam carrier so as to be axially unmovable, and a push element operatively connected to the first transmission element.

DEVICE FOR A VALVE TRAIN FOR SWITCHING OVER THE LIFT OF GAS-EXCHANGE VALVES OF AN INTERNAL COMBUSTION ENGINE

A device for a valve train for switching over the lift of gas-exchange valves of an internal combustion engine, the internal combustion engine including a camshaft on which at least one cam carrier with at least three different cam profiles is mounted so as to be torque-proof and axially movable. The device includes an adjustment shaft arranged parallel to the camshaft and on which a first transmission element is mounted so as to be torque-proof and axially movable, the first transmission element having a guide unit, a housing-fixed first guide element operatively connected to the guide unit, a second guide element that, on the one hand, is operatively connected to the guide unit and, on the other hand, to the cam carrier via a second transmission element, whereby the second transmission element is connected to the cam carrier so as to be axially immovable, and a push element. 1. A device for a valve train for switching over the lift of gas-exchange valves of an internal combustion engine , the internal combustion engine including a camshaft on which at least one cam carrier with at least three different cam profiles is mounted so as to be torque-proof and axially movable , comprising:an adjustment shaft arranged parallel to the camshaft and on which a first transmission element is mounted so as to be torque-proof and axially movable, the first transmission element having a guide unit,a housing-fixed first guide element operatively connected to the guide unit,a second guide element that, on the one hand, is operatively connected to the guide unit and, on the other hand, to the cam carrier via a second transmission element, whereby the second transmission element is connected to the cam carrier so as to be axially unmovable, anda push element,wherein the guide unit has a first guide track and a second guide track arranged axially at a distance from the first guide track, as well as at least two connecting tracks that are between the first guide track and the second ...

Compression release type engine brake and operating method for the same

An compression-release engine brake opens an exhaust valve at an end of a compression stroke for performing braking function. The compression-release engine brake includes: an exhaust cam including a main cam lobe and a brake cam lobe, an exhaust rocker arm including a roller mounted on one end of the exhaust rocker arm contacting or not contacting the exhaust cam and rotating around a rocker arm shaft by rotation of the exhaust cam, a valve bridge disposed at the other end of the exhaust rocker arm and connected with a pair of exhaust valves, and a reset module disposed between the exhaust rocker arm and valve bridge, contacting the roller with the brake cam lobe according to being suppled of engine brake oil, and exhausting the engine brake oil after opening the exhaust valve by rotation of the exhaust cam.

VALVE BRIDGE FOR VALVE SYSTEMS

A valve bridge for a valve system of an engine includes one or more valves and a valve rotator coupled to the valves. The valve bridge includes one or more end portions, a seat formed at the one or more end portions to receive the one or more valves, and an extension portion that extends outwardly from the one or more end portions. The extension portion defines a cavity configured to accommodate the valve rotator, and guide the valve bridge with the valve rotator during each opening and closing of the one or more valves relative to the engine. 1. A valve bridge for a valve system of an engine , the valve system including one or more valves and a valve rotator coupled to the one or more valves , the valve bridge comprising:one or more end portions;a seat formed at the one or more end portions to receive the one or more valves; and 'wherein the cavity is configured to accommodate the valve rotator, and guide the valve bridge with the valve rotator during each opening and closing of the one or more valves relative to the engine.', 'an extension portion extending outwardly from the one or more end portions and defining a cavity therein,'}2. The valve system of claim 1 , wherein the seat includes a recess formed at the one or more end portions.3. The valve bridge of claim 2 , wherein the cavity and the recess define a stepped configuration and together form a guide structure to guide the valve bridge with the one or more valves.4. The valve bridge of claim 2 , wherein the recess and the cavity are co-axial.5. The valve bridge of claim 2 , wherein the recess and the cavity are circular shaped claim 2 , the recess including a first diameter and the cavity including a second diameter claim 2 , the first diameter being lesser than the second diameter.6. The valve bridge of claim 1 , wherein the valve bridge includes a tappet head claim 1 , a first arm and a second arm radially extending away from the tappet head to respectively define a first end portion and a second end ...

MULTI-VALVE ACTUATING VALVE BRIDGE

A multi-valve actuating valve bridge for an engine is provided. The valve bridge includes a rocker arm engaging tappet head and at least two arms extending transversely of the rocker arm and engaging the tappet head. The valve bridge further includes a valve stem guide pocket provided on each of the arms. The valve stem guide pocket includes a valve stem contact face and a tapered surface extending from the valve stem contact face towards an opening of the valve stem guide pocket. The tapered surface defines an inverted frusto-conical cavity. A first inner diameter of the valve stem guide pocket at the valve stem contact face is greater than a second inner diameter of the valve stem guide pocket at the opening. 1. A multi-valve actuating valve bridge for an engine comprising:a rocker arm engaging tappet head;at least two arms extending transversely of the rocker arm and engaging the tappet head; and a valve stem contact face;', 'a tapered surface extending from the valve stem contact face towards an opening of the valve stem guide pocket, the tapered surface defining an inverted frusto-conical cavity; and', 'a first inner diameter of the valve stem guide pocket at the valve stem contact face greater than a second inner diameter of the valve stem guide pocket at the opening., 'a valve stem guide pocket provided on each of the arms, at least one of the valve stem guide pocket including2. The multi-valve actuating valve bridge of claim 1 , wherein a ratio of the first inner diameter to the second inner diameter is in a range of about 2:1.95 to 2:1.5.3. The multi-valve actuating valve bridge of claim 1 , wherein the tapered surface is at an angle of about 2 degrees to 15 degrees with respect to a central axis of the valve stem guide pocket.4. The multi-valve actuating valve bridge of claim 1 , wherein the tapered surface includes a chamfered edge at the opening of the valve stem guide pocket.5. The multi-valve actuating valve bridge of further comprising a lubrication ...

Method for controlling of valve timing of continuous variable valve duration engine

A method for controlling intake and exhaust valves of an engine includes: Controlling opening and closing timings of the intake and exhaust valves by an intake continuous variable valve timing (CVVT) device and an exhaust CVVT devices; determining, by a controller, target intake and exhaust opening durations of the intake and exhaust valves, and target opening and closing timings of the valves based on an engine load and an engine speed; modifying current intake and exhaust opening durations based on the target opening durations via an intake continuous variable valve duration (CVVD) device and an exhaust CVVD device; adjusting opening or closing timings of the valves to the target opening or closing timings of the valves while maintaining the modified opening durations of the valves.

CAMSHAFT ADJUSTING SYSTEM HAVING A SECOND CAMSHAFT WHICH IS SUPPORTED ON THE STATOR IN THE AXIAL DIRECTION

A camshaft adjusting system () for a first camshaft () and a second camshaft () which are arranged concentrically with respect to one another is provided, with the second camshaft () being arranged within the first camshaft (). A hydraulic camshaft adjuster () of the vane cell type is set up to adjust the first camshaft (), and an electric camshaft adjuster () is set up to adjust the second camshaft (). The second camshaft () is supported in the axial direction on a stator () of the hydraulic camshaft adjuster (). Further, a camshaft adjusting unit is provided including the camshaft adjusting system () and two camshafts (). 1. A camshaft adjusting system for a first camshaft and a second camshaft which are arranged concentrically with respect to one another , the second camshaft being arranged within the first camshaft , the camshaft adjusting system comprising:a hydraulic camshaft adjuster of the vane-cell type configured to adjust the first camshaft, the hydraulic camshaft adjuster including a stator;an electric camshaft adjuster configured to adjust the second camshaft; andthe stator including a support that is adapted to axially support the second camshaft.2. The camshaft adjusting system as claimed in claim 1 , further comprising a front cover fastened to the stator of the hydraulic camshaft adjuster that closes the hydraulic camshaft adjuster on a side which faces away from the camshafts claim 1 , the front cover including an internal toothing system that supports a flex pot that is adapted to be connected to the second camshaft and is configured to transmit torque from the electric camshaft adjuster.3. The camshaft adjusting system as claimed in claim 2 , wherein the front cover is an integral constituent part of the stator.4. The camshaft adjusting system as claimed in claim 2 , wherein the front cover is a component that is separate from the stator.5. The camshaft adjusting system as claimed in claim 2 , wherein the front cover is divided into a stop ...

CONTROL METHOD AND CONTROL SYSTEM FOR CONTINUOUSLY VARIABLE VALVE LIFT MECHANISM AND VEHICLE

A control method for a continuously variable valve lift mechanism includes: controlling a continuously variable valve lift mechanism to enter a limp mode when the continuously variable valve lift mechanism fails and disables an automatic valve lift changing function; driving and forcing the continuously variable valve lift mechanism to move to a maximum lift position; and triggering a self locking function to self lock the continuously variable valve lift mechanism at the maximum lift position when the continuously variable valve lift mechanism reaches the maximum lift position. A control system for a continuously variable valve lift mechanism, and a vehicle are also provided. 111-. (canceled)12. A control method for a continuously variable valve lift mechanism , comprising:controlling a continuously variable valve lift mechanism to enter a limp mode when the continuously variable valve lift mechanism fails and disables an automatic valve lift changing function;driving and forcing the continuously variable valve lift mechanism to move to a maximum lift position; andtriggering a self locking function to self lock the continuously variable valve lift mechanism at the maximum lift position when the continuously variable valve lift mechanism reaches the maximum lift position.13. The control method according to claim 12 , wherein the failure of the continuously variable valve lift mechanism disabling the automatic valve lift changing function comprises:a failure of an electronic control component of the continuously variable valve lift mechanism; and/ora failure of at least one phase in a three phase line of an electric motor.14. The control method according to claim 12 , wherein the continuously variable valve lift mechanism is configured such that at the maximum lift position claim 12 , a resultant force of a roller assembly the continuously variable valve lift mechanism on an eccentric wheel has a direction passing through an axis of an eccentric shaft claim 12 , so ...

SOCKET MODULE OF COMPRESSION RELEASE TYPE ENGINE BRAKE AND OPERATING METHOD OF ENGINE BRAKE USING THEREOF

A socket module for a compression release engine brake is provided between an exhaust rocker arm rotating with respect to a rocker arm shaft and a valve bridge in contact with an exhaust valve of an engine. In particular, the socket module includes: a housing which includes an inlet through which brake oil is introduced, a brake piston mounting portion, and a reset member mounting portion communicated with the brake piston mounting portion; a brake piston that is provided to be movable in the brake piston mounting portion; and a reset member that is provided in the reset member mounting portion and that discharges brake oil by selectively contacting a push pin coupled to an upper portion of a cylinder head of the engine. 1. A socket module for a compression release engine brake , where the socket module is provided between an exhaust rocker arm rotating with respect to a rocker arm shaft and a valve bridge in contact with an exhaust valve of an engine , the socket module comprising: an inlet through which brake oil is introduced,', 'a brake piston mounting portion, and', 'a reset member mounting portion configured to communicate with the brake piston mounting portion;, 'a housing includinga brake piston configured to move in the brake piston mounting portion; anda reset member provided in the reset member mounting portion, and configured to discharge brake oil by selectively contacting a push pin coupled to an upper portion of a cylinder head of the engine.2. The socket module of claim 1 , wherein the housing further includes: a rounded mounting groove protruded upward from a upper center of the housing where an adjusting screw mounted to one end of the exhaust rocker arm is mounted.3. The socket module of claim 1 , wherein the reset member mounting portion comprises:a first passage connected with the brake piston mounting portion through a first outlet; anda second passage configured to discharge brake oil and connected with the first passage through a slanted ...

SOCKET MODULE OF COMPRESSION RELEASE TYPE ENGINE BRAKE AND OPERATING METHOD OF ENGINE BRAKE USING THEREOF

A compression release type of engine brake socket module is provided between an exhaust rocker arm rotating with respect to a rocker arm shaft and a valve bridge connecting an exhaust valve of an engine. In particular the socket module incudes: a housing which includes an inlet through which brake oil is introduced, a brake piston mounting portion, and a reset member mounting portion communicating with the brake piston mounting portion; a brake piston that is provided to be movable in the brake piston mounting portion; a stopper disposed on one side of an inner space of the housing to limit a moving position of the brake piston; and a reset member that is provided in the reset member mounting portion, and that discharges the brake oil by selectively contacting a push pin coupled to an upper portion of a cylinder head. 1. A compression-release engine brake socket module provided between an exhaust rocker arm rotating with respect to a rocker arm shaft and a valve bridge connecting an exhaust valve , the compression-release engine brake socket module comprising: an inlet through which brake oil is introduced,', 'a brake piston mounting portion, and', 'a reset member mounting portion configured to communicate with the brake piston mounting portion;, 'a housing includinga brake piston configured to move in the brake piston mounting portion;a stopper disposed on one side of an inner space of the housing and configured to limit a moving position of the brake piston; anda reset member provided in the reset member mounting portion, and configured to discharge the brake oil by selectively contacting a push pin coupled to an upper portion of a cylinder head.2. The compression-release engine brake socket module of claim 1 , further comprisingat least one upper protrusion and a lower protrusion formed on an exterior surface of each of an upper portion and a lower portion of the brake piston so that movement of the brake piston is restricted by the stopper.3. The compression- ...

SELF-RESETTING SINGLE-VALVE DOUBLE-PISTON HYDRAULIC DRIVE DEVICE AND METHOD FOR OVERHEAD CAM ENGINE

A self-resetting single-valve double-piston hydraulic drive device and method for an overhead cam engine is disclosed. A primary driving piston and a secondary driving piston are respectively provided on a rocker arm body and a valve bridge body. The secondary driving piston is connected to an exhaust valve. When the drive control valve opens, the primary driving piston and the secondary driving piston realize a hydraulic linkage, during a drive lift, the secondary driving piston opens the exhaust valve. At the beginning of the positive-power lift, the secondary driving piston is automatically reset. When the control valve is closed, during the drive lift of an integrated cam, the primary driving piston absorbs the drive lift of an integrated cam assembly, the rocker arm body and the bridge body do not move, and the drive lift of the integrated cam is not transmitted to the exhaust valve. 120.-. (canceled)21. A self-resetting single-valve double-piston hydraulic drive device for an overhead cam engine , the hydraulic drive device comprising: a rocker arm body defining a driving oil passage,', 'a drive control valve configured to selectively open the driving oil passage,', 'a primary driving piston arranged at a first end of the rocker arm body, and', 'a first elephant foot assembly arranged at a second end of the rocker arm body;, 'a rocker arm assembly includingan integrated cam arranged below the primary driving piston, the integrated cam configured to rotate the rocker arm body;an exhaust valve assembly including an inner-side exhaust valve and an outer-side exhaust valve; a valve bridge body arranged below the first elephant foot assembly, the valve bridge body defining an oil drain passage, and', 'a secondary driving piston configured to engage one of the inner-side exhaust valve or the outer-side exhaust valve, the secondary driving piston selectively connected to the driving oil passage via the oil drain passage; and, 'a valve bridge assembly includinga limit ...

Self-resetting single-valve hydraulic drive device and method based on primary and secondary pistons for push rod engine

A self-resetting single-valve hydraulic drive device and method based on primary and secondary pistons for a push rod engine is provided. A primary driving piston and a secondary driving piston are respectively provided on a rocker arm body and a valve bridge body. The secondary driving piston is connected to an exhaust valve. A driving oil passage connects the primary driving piston, the secondary driving piston and a drive control valve. When the drive control valve opens the driving oil passage, the primary driving piston and the secondary driving piston realize a hydraulic linkage. During a drive lift, the rocker arm body and the valve bridge body do not move, and the secondary driving piston opens the exhaust valve. In the beginning of a positive-power lift, a primary piston body oil passage and a secondary piston oil passage are closed, and the secondary driving piston is automatically reset.

BEAM-LIKE CROSSHEAD FOR A VALVE TRAIN OF A HEAVY-DUTY INTERNAL COMBUSTION ENGINE

A beam-like crosshead for a valve train of an internal combustion engine is proposed for the transmission of a cam lift to two gas exchange valves. The crosshead has two side walls which are connected by a transverse wall, and, on an upper side of the transverse wall at its longitudinal center, a contact surface for a cam follower, and, on an underside of the transverse wall at each of its longitudinal ends, a valve contact surface. The crosshead is a reversed bowl-like hollow body which is produced from steel sheet using stamping/bending technology. From the transverse wall the side walls and, transversely at each longitudinal end, end walls hang in a finger-like manner. Cut edges between the side and end walls, starting from the transverse wall, form cut-outs. 1. A crosshead for a valve train of an internal combustion engine for a transmission of a cam lift to two gas exchange valves , the crosshead comprising: a first side wall connected to a second side wall via a transverse wall,', 'a contact surface configured to engage a rocker arm or a camshaft, the contact surface formed on an upper side of the transverse wall, and', 'a first valve contact surface and a second valve contact surface formed on an underside of the transverse wall,', 'a first end wall configured as a first finger extending from a first longitudinal end of the transverse wall, and a second end wall configured as a second finger extending from a second longitudinal end of the transverse wall, and', 'the first end wall is cut and separated from the first and second side walls such that first respective cut edges of the first end wall and the first and second side walls form first and second cut-outs, and, 'a body forming an inverted U-shape cross-sectional profile via bending of steel sheet, the body havingthe second end wall cut and separated from the first and second side walls such that respective second cut edges of the second end wall and the first and second side walls form third and fourth ...

VARIABLE VALVE DURATION/VARIABLE VALVE LIFT SYSTEM AND ENGINE PROVIDED WITH THE SAME

A variable valve duration/variable valve lift system may include a camshaft, a first cam portion including a first cam, into which the camshaft is inserted and of which a relative phase angle of the first cam with respect to the camshaft is variable, an inner bracket transmitting rotation of the camshaft to the first cam portion, a slider housing into which the inner bracket is rotatably inserted, a first rocker arm having a first end contacting the first cam, a rocker shaft to which the first rocker arm is rotatably connected, a solenoid valve configured to selectively supply hydraulic pressure, a position controller configured to selectively change a position of the slider housing, a first bridge connected to a second end of the first rocker arm and to which a first valve is connected, and a valve lift disposed within the first bridge. 1. A variable valve duration/variable valve lift system , comprising:a camshaft;a first cam portion including a first cam, into which the camshaft is inserted and of which a relative phase angle of the first cam with respect to the camshaft is variable;an inner bracket transmitting rotation of the camshaft to the first cam portion;a slider housing into which the inner bracket is rotatably inserted;a first rocker arm having a first end contacting the first cam;a rocker shaft to which the first rocker arm is rotatably connected;a solenoid valve configured to selectively supply hydraulic pressure;a position controller configured to selectively change a position of the slider housing according to the selective supplying of the hydraulic pressure from the solenoid valve;a first bridge connected to a second end of the first rocker arm and to which a first valve is connected; anda valve lift disposed within the first bridge for changing valve lift of the first valve according to supplying of the hydraulic pressure from the solenoid valve.2. The variable valve duration/variable valve lift system of claim 1 , whereina control hydraulic line ...

Method for controlling a motor-vehicle provided with a propulsion system of the "mild-hybrid" type

In a vehicle provided with a power propulsion system of the mild-hybrid type, a BAS unit —including an electric machine connected through a belt transmission to the shaft of an internal combustion engine—is exploited as the only propulsion engine of the vehicle in given operating conditions. The internal combustion engine is provided with a system for variable actuation of the intake valves which is controlled to reduce the pumping losses of the internal combustion engine in the phase in which such engine is in cut-off condition and it is driven by the aforementioned BAS unit. It is also provided for that the system for variable actuation of the intake valves be controlled to temporarily increase the pumping losses of the internal combustion engine in a phase in which it is required to accelerate the switching off of the engine.

TWO-PIECE BLOCK FOR VARIABLE VALVE TRAIN SYSTEM

A variable valve train module has a valve control block positioned on a cylinder head of the engine. The valve control block has a first block and a second block and variable valve train components. These components include at least one valve, a rocker arm, a brake, and a pump configured to receive input from a camshaft. The components are positioned with respect to the blocks such that the first block receives a first portion of the pump and the second block receives a second portion of the pump. 1. A variable valve train module for an engine , comprising:a valve control block positioned on a cylinder head of the engine, the valve control block including a first block and a second block; andvariable valve train components including at least one valve, a rocker arm, a brake, and a pump configured to receive input from a camshaft,wherein the first block receives a first portion of the pump and the second block receives a second portion of the pump.2. The variable valve train module of claim 1 , wherein the pump includes a piston claim 1 , a bushing claim 1 , and a spring.3. The variable valve train module of claim 2 , wherein the first portion of the pump includes a portion of the piston and the second portion of the pump includes the bushing.4. The variable valve train module of claim 3 , wherein the first block is positioned on the cylinder head of the engine and the second block is positioned on the first block.5. The variable valve train module of claim 2 , wherein the bushing includes a flange sandwiched between the first block and the second block.6. The variable valve train module of claim 5 , wherein at least one of the first or second block includes a groove which receives the flange.7. The variable valve train module of claim 5 , wherein the bushing includes a receiving portion which receives a portion of the piston and the flange extends outwardly from the receiving portion.8. The variable valve train module of claim 2 , wherein the piston extends ...

Mechanically timed cylinder deactivation system

A system and method for mechanically timed cylinder deactivation includes an inner passage in the camshaft that supplies fluid for deactivating one or more valve opening mechanisms associated with the cylinders of an internal combustion engine.

Oil Control Valve System For Valve Actuation Switching

An oil control valve system according to one example of the present disclosure incorporates a common or interchangeable oil control valve at distinct locations of an engine to direct operation of switching mechanisms over sets of three cylinders. In another aspect of the present disclosure, four interchangeable oil control valves are used in a six-cylinder engine. Utilizing interchangeable oil control valves minimizes design costs, reduces assembly time, lessens repair or replacement burdens, and allows for enhanced engine performance. 1. An oil control valve system for an engine having first , second , third , fourth , fifth and sixth engine cylinders , each engine cylinder having a first and a second intake valve in operable contact with a respective switching rocker arm , the oil control valve system comprising:a first oil control valve that actuates a switching rocker arm associated with the first and second cylinders throughout an engine combustion cycle;a second oil control valve that actuates a switching rocker arm associated with the second and third cylinders throughout the engine combustion cycle;a third oil control valve actuates a switching rocker arm associated with the fourth and fifth cylinder throughout the engine combustion cycle; anda fourth oil control valve actuates a switching rocker arm associated with the fifth and sixth cylinder throughout the engine combustion cycle.2. The oil control valve system of wherein the first claim 1 , second claim 1 , third and fourth oil control valves are each configured to provide a common output pressure to a switching mechanism of each respective switching rocker arm for a predetermined input pressure.3. The oil control valve system of wherein the first claim 1 , second claim 1 , third and fourth oil control valves are interchangeable.4. The oil control valve system of wherein the first claim 1 , second claim 1 , third and fourth oil control valves are common oil control valves relative to each other.5. The ...

Hydraulic lash adjuster

A hydraulic lash adjuster for an engine valve train has a hydraulic lash adjusting arrangement for automatically compensating for lash in an engine valve train, and a lost motion arrangement for inhibiting motion induced in the valve train in response to a lift profile of a rotating cam from being transferred to an engine valve.

HYDRAULIC LASH ADJUSTER

An eccentric hydraulic lash adjuster, a combustion engine comprising the eccentric hydraulic lash adjuster, and a method of assembling the combustion engine, the combustion engine including a rocker lever having a nose at a distal end thereof, and a bridge bar extending between two valves, the rocker lever configured to apply pressure on the bridge bar to actuate the two valves, and an eccentric hydraulic lash adjuster positioned in the nose of the rocker lever; and a fuel injector adjacent to the nose of the rocker lever and the bridge bar, wherein the eccentric hydraulic lash adjuster includes a housing having a pivot point and a longitudinal axis offset from the pivot point and is configured to pivot about the pivot point when the rocker lever pivots about the rocket lever shaft, wherein the offset is dimensioned to prevent interference between the nose and the fuel injector. 1. An eccentric hydraulic lash adjuster comprising:a housing having a pivot point and a longitudinal axis offset from a line parallel to the longitudinal axis and passing through the pivot point, wherein the offset is greater than 0.0 millimeters (mm).2. The eccentric hydraulic lash adjuster of claim 1 , wherein the housing comprises a pivot ball having a center comprising the pivot point.3. The eccentric hydraulic lash adjuster of claim 1 , wherein the housing comprises a cylindrical cavity and the longitudinal axis comprises an axis of the cylindrical cavity.4. The eccentric hydraulic lash adjuster of claim 1 , wherein the offset is equal to or greater than 1.0 mm.5. The eccentric hydraulic lash adjuster of claim 1 , wherein the offset is equal to or greater than 2.0 mm.6. The eccentric hydraulic lash adjuster of claim 1 , wherein the offset is between and including 1.0 mm and 10.0 mm.7. The eccentric hydraulic lash adjuster of claim 1 , wherein the offset is between and including 2.0 mm and 6.0 mm.8. A valve train assembly comprising:an eccentric hydraulic lash adjuster including a ...

Valve train for the variable actuation of an inlet valve and an outlet valve,and internal combustion engine having a valve train of this type

A valve train for the variable actuation of an inlet valve and an outlet valve of a combustion chamber of an internal combustion engine, having a first operative connection between a valve actuating device and the inlet valve and a second operative connection between the valve actuating device and the outlet valve. The first operative connection and the second operative connection are assigned an interrupting element which is set up to temporarily interrupt the operative connections. The first operative connection and the second operative connection are connected to the same interrupting element in such a way that the first operative connection and the second operative connection can be interrupted temporarily by way of the interrupting element.

VALVETRAIN WITH VARIABLE VALVE ACTUATION

A method of providing a rocker arm set for a valvetrain includes providing a first intake rocker arm, a second intake rocker arm and a first exhaust rocker arm. The first intake rocker arm is configured as a switching rocker arm for a first intake valve on a first cylinder. The second intake rocker arm is for a second intake valve on a second cylinder. The second rocker arm is configured to operate in a normal Otto cycle mode. The first exhaust rocker arm is provided for a first exhaust valve on the second cylinder. The first intake rocker arm operates in one of an LIVC or EIVC mode where the first intake rocker arm is configured to open or close at a different time compared to the second intake valve. The first exhaust rocker arm operates in a cylinder deactivation mode. 146-. (canceled)47. A method of providing a rocker arm set for a valvetrain having a plurality of cylinders , the method comprising:providing a first intake rocker arm for a first intake valve on a first cylinder of the plurality of cylinders;providing a second intake rocker arm configured as a switching rocker arm for a second intake valve on the first cylinder, the second intake rocker arm selectively switchable between (i) a normal mode and (ii) an added motion mode;providing a first exhaust rocker arm configured as a switching rocker arm for a first exhaust valve on a second cylinder of the plurality of cylinders, the first exhaust rocker arm selectively switchable between (i) a normal mode and (ii) an added motion mode; andproviding a second exhaust rocker arm for a second exhaust valve on the second cylinder.48. The method of claim 47 , wherein the first intake rocker arm is a standard rocker arm configured to operate in a normal Otto cycle mode.49. The method of claim 48 , wherein the second exhaust rocker arm is a standard rocker arm configured to operate in a normal Otto cycle mode.50. The method of claim 47 , wherein the added motion mode of the second intake rocker arm is one of a late ...

SELF-CONTAINED COMPRESSION BRAKE CONTROL MODULE FOR COMPRESSION-RELEASE BRAKE SYSTEM OF AN INTERNAL COMBUSTION ENGINE

A compression-release brake system for operating an exhaust valve of an engine during an engine braking operation. The compression-release brake system comprises a self-contained compression brake control module (CBCM) operatively coupled to the exhaust valve for controlling a lift and a phase angle thereof. The CBCM includes a casing defining an actuator cavity, a actuation piston disposed outside the casing so as to define an actuation piston cavity between the casing and the actuation piston, and a check valve provided between the actuation piston cavity and a compression brake actuator disposed in the actuator cavity. The actuation piston reciprocates relative to the casing. The compression brake actuator includes an actuator element and a biasing spring. The actuator element selectively engages the check valve when deactivated so as to unlock the actuation piston cavity and disengages from the check valve when activated so as to lock the actuation piston cavity. 1. A compression brake control module , in a compression-release brake system for operating at least one exhaust valve of an internal combustion engine during a compression-release engine braking operation , the compression brake control module operatively coupled to at least one exhaust valve for controlling a lift and a phase angle of said at least one exhaust valve , so as to maintain the at least one exhaust valve open during a compression stroke of the engine when the engine performs a compression-release engine braking operation , the compression brake control module comprising:a casing including a single-piece body, adapted for mounting within and fixedly engaging a bore within said engine, said casing including an internal actuator cavity;an actuation piston disposed outside the casing and within said bore so as to define a variable volume hydraulic actuation piston cavity between the casing and the actuation piston and an inner surface of said bore, the actuation piston reciprocating relative ...

Compression-release engine brake system for lost motion rocker arm assembly and method of operation thereof

A compression-release brake system comprises an exhaust rocker arm, an actuation piston slidable in a piston bore in the exhaust rocker arm so as to press an exhaust valve, a supply conduit formed within the exhaust rocker arm, and an exhaust valve reset device mounted to the exhaust rocker arm. The actuation piston defines an actuation piston cavity within the actuation piston bore between the piston bore and the actuation piston. The exhaust valve reset device includes a reset check valve disposed between the supply conduit and the actuation piston cavity to hydraulically lock the actuation piston cavity by closing the reset check valve when a pressure of the hydraulic fluid within the actuation piston cavity exceeds the pressure of the hydraulic fluid in the supply conduit. The reset check valve is biased closed by the pressure of the hydraulic fluid within the actuation piston cavity during the brake-on mode.

Rocker arm

A dual body rocker arm for controlling a valve of a cylinder of an internal combustion engine includes: a first body; a second body; and a latching arrangement moveable to latch and unlatch the first body and the second body. The latching arrangement includes: a latch pin moveable between a first position in which the latch pin latches the first body and the second body together and a second position in which the first body and the second body are un-latched; and a lever mounted for pivotal motion relative to the first body, a first end of the lever contacting the latch pin, and a second end of the lever configured to contact an actuation arrangement. In use, when the actuation arrangement exerts a force on the second end of the lever, the lever pivots such that the first end of the lever exerts a force on the latch pin.

ACTUATOR ARRANGEMENT

An actuator arrangement for controlling a first latching arrangement of a first dual body rocker arm for controlling an intake valve of an internal combustion engine, and for controlling a second latching arrangement of a second dual body rocker arm for controlling an exhaust valve of the internal combustion engine, the first and second dual body rocker arms each including a first body, a second body, and the latching arrangement controllable to latch and unlatch the first body and the second body. The actuator arrangement includes: an actuation source; and an actuation transmission arrangement for transmitting movement of the actuation source to both the first latching arrangement and the second latching arrangement. In use, movement of the actuation source causes, via the actuation transmission arrangement, control of the first latching arrangement and of the second latching arrangement in common. 1. An actuator arrangement for controlling a first latching arrangement of a first dual body rocker arm for controlling an intake valve of an internal combustion engine , and for controlling a second latching arrangement of a second dual body rocker arm for controlling an exhaust valve of the internal combustion engine , the first and second dual body rocker arms each comprising a first body , a second body , and the latching arrangement controllable to latch and unlatch the first body and the second body , the actuator arrangement comprising:an actuation source; andan actuation transmission arrangement configured to transmit movement of the actuation source to both the first latching arrangement and the second latching arrangement,wherein, in use, movement of the actuation source is configured to cause, via the actuation transmission arrangement, control of the first latching arrangement and of the second latching arrangement in common.2. The actuator arrangement according to claim 1 , wherein the actuation transmission arrangement is configured to transmit movement of ...

ACTUATOR ARRANGEMENT

An actuator arrangement for controlling a latching arrangement of a dual body rocker arm of an internal combustion engine, the dual body rocker arm comprising a first body, a second body, and the latching arrangement, the latching arrangement being controllable to latch and unlatch the first body and the second body. The actuator arrangement includes: an actuation source; a shaft including a cam for controlling the latching arrangement; and a gear mechanism for translating a continuous rotation of the actuation source into an intermittent rotation of the shaft in steps of a predefined degree. In use, a continuous rotation of the actuation source causes, via the gear mechanism, the shaft to rotate in steps of a predefined degree, thereby to change an orientation of the cam relative to the latching arrangement by a predefined amount, so as to control the latching arrangement. 1. An actuator arrangement for controlling a latching arrangement of a dual body rocker arm of an internal combustion engine , the dual body rocker arm comprising a first body , a second body , and the latching arrangement , the latching arrangement being controllable to latch and unlatch the first body and the second body , the actuator arrangement comprising:an actuation source;a shaft comprising a cam configured to control the latching arrangement; anda gear mechanism configured to translate a continuous rotation of the actuation source into an intermittent rotation of the shaft in steps of a predefined degree,wherein, in use, a continuous rotation of the actuation source is configured to cause, via the gear mechanism, the shaft to rotate in steps of a predefined degree, thereby to change an orientation of the cam relative to the latching arrangement by a predefined amount, so as to control the latching arrangement.2. The actuator arrangement according to claim 1 , wherein the gear mechanism is configured to prevent rotation of the shaft claim 1 , between the intermittent rotation of the shaft ...

Variable valve train with a rocker arm

A variable valve train for gas exchange lifting valve of an internal combustion engine. The valve can be moved between open and closed positions periodically by way of a cam via a rocker arm. The variable valve train includes a camshaft having at least first and second cams which are arranged offset in the longitudinal direction of the camshaft. The first and second cams having cam contours. The valve train includes a rocker arm mounted which pivots about a rocker arm axis and is assigned to the at least one first cam via a pressure roller at its camshaft-side end and is connected to at least one lifting valve at its valve-side end, and a roller lever which is assigned to the at least one second cam at its camshaft-side end and is articulated at its other end on the rocker arm and pivots about the rocker arm axis.

VALVE BRIDGE SYSTEMS COMPRISING VALVE BRIDGE GUIDE

A valve bridge system comprises a valve bridge configured to extend between at least two engine valves of an internal combustion engine. In one embodiment, a valve bridge guide is operatively connected to the valve bridge and configured to extend between at least two valve springs respectively corresponding to the at least two engine valves, the valve bridge guide defining a surface conforming to a valve spring of the at least two valve springs. In another embodiment, the valve bridge guide may comprise at least a first member maintained in a first fixed position relative to and at a predetermined distance from the valve bridge. In both embodiments, the valve bridge guide is configured to avoid contact with the valve bridge in a controlled state, but to permit contact with valve bridge to resist uncontrolled movement of the valve bridge. 1. A valve bridge system for use with an engine valve assembly of an internal combustion engine , the engine valve assembly comprising at least two engine valves , at least two valve springs corresponding to the at least two engine valves and at least two spring retainers corresponding to the at least two engine valves , the valve bridge system comprising:a valve bridge configured to extend between the at least two engine valves; anda valve bridge guide operatively connected to the valve bridge and comprising a valve bridge control surface for selectively contacting at least one of the valve bridge or the engine valve assembly,wherein the valve bridge control surface is configured to not contact the at least one of the valve bridge or engine valve assembly when the valve bridge is in a controlled state relative to the at least two engine valves,and wherein the valve bridge control surface is configured to contact the at least one of the valve bridge or engine valve assembly to resist uncontrolled movement of the valve bridge when the valve bridge is in an uncontrolled state relative to the at least two engine valves.2. The valve ...

COMBINED ENGINE BRAKING AND POSITIVE POWER ENGINE LOST MOTION VALVE ACTUATION SYSTEM

A system for actuating one or more engine valves for positive power operation and engine braking operation is disclosed. In a preferred embodiment, an exhaust valve bridge and intake valve bridge each receive valve actuations from two sets of rocker arms. Each valve bridge includes a sliding pin for actuating a single engine valve and an outer plunger disposed in the center of the valve bridge to actuate two engine valves through the bridge. The outer plunger of each valve bridge may be selectively locked to its valve bridge to provide positive power valve actuation. During engine braking, application of hydraulic pressure to the outer plungers may cause the respective valve bridges and outer plungers to unlock so that all engine braking valve actuations are provided from a rocker arm acting on one engine valve through the sliding pin. 1. A valve bridge for use in an internal combustion engine comprising a plurality of cylinders , the valve bridge comprising:a valve bridge body configured to extend between two valves for a cylinder of the plurality of cylinders, the valve bridge body having a central opening extending through a thickness of the valve bridge body at a location between the two valves; anda first lost motion assembly disposed within the central opening,wherein the valve bridge body further comprises a slide opening having a sliding pin disposed therein, the side opening and sliding pin configured to align with a first valve of the two valves,wherein engine braking events are imparted to the first valve of the two valves via the sliding pin and a second lost motion assembly.2. The valve bridge of claim 1 , wherein the engine braking events imparted to the first valve of the two valves via second lost motion assembly comprise at least two compression release events for every four engine strokes.3. The valve bridge of claim 1 , wherein the second lost motion assembly comprise a hydraulic lost motion assembly.4. The valve bridge of claim 1 , wherein the ...

Valve actuation system comprising in-series lost motion components for use in cylinder deactivation and auxiliary valve actuations

A valve actuation system comprises a valve actuation motion source configured to provide a main valve actuation motion and an auxiliary valve actuation motion for actuating at least one engine valve via a valve actuation load path. A lost motion subtracting mechanism is arranged in the valve actuation load path and configured, in a first default operating state, to convey at least the main valve actuation motion and configured, in a first activated state, to lose the main valve actuation motion and the auxiliary valve actuation motion. Additionally, a lost motion adding mechanism configured, in a second default operating state, to lose the auxiliary valve actuation motion and configured, in a second activated state, to convey the auxiliary valve actuation motion, wherein the lost motion adding mechanism is in series with the lost motion subtracting mechanism in the valve actuation load path at least during the second activated state.

Variable valve lift apparatus

A variable valve lift apparatus to vary lift of a valve disposed at an engine may include an outer body selectively making a lever motion according to rotation of a cam, being adapted such that the valve is connected with one end thereof and a pivot axis of the lever motion is disposed at another end thereof, and forming an inside space, an inner body disposed in the inside space of the outer body and adapted such that one end thereof is rotatably connected with the one end of the outer body, a connecting shaft disposed so as to penetrate the one end of the outer body and the one end of the inner body and connect the outer body with the inner body, and a lost motion spring provided so as to return the inner body which is relatively rotated with the outer body around the connecting shaft.

Valve actuation system comprising in-series lost motion components deployed in a pre-rocker arm valve train component and valve bridge

A valve actuation system comprises a valve actuation motion source configured to provide a main valve actuation motion and an auxiliary valve actuation motion for actuating at least one engine valve via a valve actuation load path. A lost motion subtracting mechanism is arranged in a pre-rocker arm valve train component and configured, in a first default operating state, to convey at least the main valve actuation motion and configured, in a first activated state, to lose the main valve actuation motion and the auxiliary valve actuation motion. Additionally, a lost motion adding mechanism is arranged in a valve bridge and configured, in a second default operating state, to lose the auxiliary valve actuation motion and configured, in a second activated state, to convey the auxiliary valve actuation motion, wherein the lost motion adding mechanism is in series with the lost motion subtracting mechanism in the valve actuation load path.

SYSTEM AND METHOD FOR PROVIDING EGR TO AN ENGINE

Methods and systems are provided for providing exhaust gas recirculation to a naturally aspirated internal combustion engine. In one example, exhaust gas is recirculated to an engine intake via a dedicated scavenging manifold and a scavenging exhaust valve. The exhaust gas and fresh air that has not participated in combustion may be recirculated to engine cylinders even at high engine loads since the exhaust gas and fresh air is returned to the engine air intake at a pressure greater than atmospheric pressure. 2. The method of claim 1 , wherein opening the second exhaust valve following opening the first exhaust valve includes flowing combusted exhaust gases to the intake passage via the second exhaust valve.3. The method of claim 1 , wherein opening the opening the second exhaust valve following opening of the first exhaust valve and reopening the second exhaust valve following opening of the intake valve includes claim 1 , after opening the second exhaust valve following opening of the first exhaust valve claim 1 , closing the second exhaust valve for a duration prior to reopening the second exhaust valve following opening of the intake valve.4. The method of claim 3 , wherein the duration of closing the second exhaust valve prior to reopening occurs in an intake stroke of the same cycle of the cylinder.5. The method of claim 1 , wherein the opening the second exhaust valve following opening the first exhaust valve includes opening the second exhaust valve during an exhaust stroke of the same cycle of the cylinder and closing the second exhaust valve during the exhaust stroke or during an intake stroke of the same cycle of the cylinder.6. The method of claim 5 , wherein the reopening of the second exhaust valve includes reopening the second exhaust valve during the intake stroke of the same cycle of the cylinder and closing the second exhaust valve during a compression stroke of the same cycle of the cylinder.7. The method of claim 1 , further comprising: during ...

METHOD AND SYSTEM FOR A CONTINUOUSLY VARIABLE VALVE LIFT SYSTEM

Methods and systems are provided for a valve system for actuating two cylinder valves in an engine. In one example, the valve system may include a single pump and a solenoid valve capable of non-concurrently actuating the two cylinder valves coupled to separate cylinders. 1. A system for an engine , comprising:a valve system including a pump and a solenoid valve for non-concurrent actuation of two cylinder valves coupled to two separate cylinders.2. The system of claim 1 , wherein the engine includes four cylinders in an in-line formation and wherein each of the two cylinder valves include a hydraulic valve actuator coupled to the solenoid valve.3. The system of claim 1 , wherein the two cylinder valves are intake valves or exhaust valves claim 1 , valve timings of the two cylinder valves not overlapping.4. The system of claim 1 , wherein the two cylinder valves include a first intake valve coupled to a first cylinder and a fourth intake valve coupled to a fourth cylinder.5. The system of claim 4 , wherein the two cylinder valves include a second intake valve coupled to a second cylinder and a third intake valve coupled to a third cylinder.6. The system of claim 5 , wherein the two cylinder valves include the first intake valve coupled to the first cylinder and a second exhaust valve coupled to the second cylinder.7. The system of claim 4 , wherein the two cylinder valves include a first exhaust valve coupled to the first cylinder and a fourth exhaust valve coupled to the fourth cylinder.8. The system of claim 6 , wherein the two cylinder valves include the second exhaust valve coupled to the second cylinder and a third exhaust valve coupled to the third cylinder.9. The system of claim 1 , further comprising claim 1 , a camshaft driving a roller finger follower coupled to the pump.10. The system of claim 2 , wherein the solenoid valve includes four ports claim 2 , a first port coupled to the pump claim 2 , a second port coupled to a pressure accumulator claim 2 , a ...

Piston machine

A piston machine including: a crankshaft; a cylinder defining an internal chamber; a piston positioned in the chamber, the piston being connected to the crankshaft and being configured to reciprocate inside the chamber; a head attached to the cylinder and closing the chamber at an end opposing the piston. The head includes at least one port group including ports for allowing fluid communication between the chamber and a respective manifold; and for each port group, a valve arrangement coupled to the head, each valve arrangement including, a valve for operatively controlling fluid flow through the respective port and a bridge coupled to the valves, wherein movement of the bridge relative to the head causes synchronised operation of the valves; and, an actuator for causing the bridge to move based on the reciprocation of the piston.

CONTINUOUS VARIABLE VALVE DURATION APPARATUS AND ENGINE PROVIDED WITH THE SAME

A continuous variable valve duration system may include a camshaft, a first cam portion including a first cam, of which the camshaft is inserted therein, an internal bracket transmitting rotation of the camshaft to the first cam portion, a control shaft parallel to the camshaft, a slider housing in which the internal bracket is rotatably inserted, on which a control groove where the control shaft is inserted into is formed, and the slider housing movable vertical to the camshaft, a guider configured for guiding movement of the slider housing, a rocker shaft, a first rocker arm rotatably disposed to the rocker shaft of which a first end portion contacts with the first cam and of which a second end portion is connected to a first valve and a control portion selectively rotating the control shaft for changing a position of the slider housing. 1. A continuous variable valve duration system comprising:a camshaft;a first cam portion including a first cam, of which the camshaft is inserted therein and of which a relative phase angle of the first cam with respect to the camshaft is configured to be variable;an internal bracket configured for transmitting a rotation of the camshaft to the first cam portion;a control shaft parallel to the camshaft;a slider housing in which the internal bracket is rotatably inserted, on which a control groove where the control shaft is inserted into is formed, wherein the slider housing is configured to be movable vertical to the camshaft;a guider configured for guiding a movement of the slider housing;a rocker shaft;a first rocker arm rotatably disposed to the rocker shaft of which a first end portion is configured to contact with the first cam and of which a second end portion is connected to a first valve; anda control portion configured for selectively rotating the control shaft for changing a position of the slider housing.2. The continuous variable valve duration system of claim 1 , further including an eccentric rod connected the ...

VARIABLE VALVE LIFT APPARATUS

A variable valve lift apparatus include a cam rotating together with a camshaft, a lever body being rolling-contacted to one end portion of the cam, and making a lever motion by receiving torque of the cam, two valves operating depending on a lever motion of the lever body, a valve gap control device being disposed at the other end portion of the lever body to simultaneously push the two valves by a main lift and controlling a gap of the valve, and an operation portion operated to selectively push a variable valve which is one among the two valves by a sub lift and disposed at the other end portion of the lever body. 1. A variable valve lift apparatus comprising:a cam rotating together with a camshaft;a lever body being rolling-contacted to a first end portion of the cam, and making a lever motion by receiving torque of the cam;two valves operating depending on the lever motion of the lever body;a valve gap control device being disposed at a second end portion of the lever body to simultaneously push the two valves by a main lift and controlling a gap of the valves; andan operation portion operated to selectively push a variable valve which is one among the two valves by a sub lift and disposed at the second end portion of the lever body.2. The variable valve lift apparatus of claim 1 , wherein a roller is disposed at a portion that the lever body is in contact with the cam.3. The variable valve lift apparatus of claim 1 , wherein the operation portion includes:an actuator operated by hydraulic pressure;a chamber which is a volume selectively forming high pressure depending on an operation of the actuator;a plunger making a reciprocal rectilinear motion according to pressure change in an internal of the chamber; anda solenoid valve operated to selectively supply the hydraulic pressure to the actuator.4. The variable valve lift apparatus of claim 3 , wherein the plunger selectively pushes the variable valve by the sub lift claim 3 , and a plunger elastic portion is ...

VARIABLE VALVE DURATION/VARIABLE VALVE LIFT SYSTEM AND ENGINE PROVIDED WITH THE SAME

The present disclosure provides a variable valve duration/variable valve lift system including a camshaft in a first cam with a variable relative phase angle with respect to the camshaft, an inner bracket transmitting rotation of the camshaft, a slider housing, a first rocker arm of which a first end contacts the first cam, a rocker shaft connected to the first rocker arm on which hydraulic lines are formed, solenoid valves configured to selectively supply hydraulic pressure through the hydraulic lines, a position controller configured to selectively change a position of the slider housing according to supplied hydraulic pressure from the solenoid valves, a first bridge connected to a second end of the first rocker arm and to which a first valve is connected, and a first valve lift device disposed within the first bridge for changing valve lift of the first valve according to supplied hydraulic pressure from hydraulic lines. 1. A variable valve duration/variable valve lift system comprising:a camshaft;a first cam portion including a first cam, into which the camshaft is inserted and of which a relative phase angle of the first cam with respect to the camshaft is variable;an inner bracket transmitting rotation of the camshaft to the first cam portion;a slider housing in which the inner bracket is rotatably inserted;a first rocker arm of which a first end contacts the first cam;a rocker shaft to which the first rocker arm is rotatably connected and on which a first control hydraulic line and a second control hydraulic line are formed;a first solenoid valve configured to selectively supply hydraulic pressure through the first control hydraulic line;a second solenoid valve configured to selectively supply hydraulic pressure through the second control hydraulic line;a position controller configured to selectively change a position of the slider housing according to supplied hydraulic pressure from the first solenoid valve;a first bridge connected to a second end of the ...

COMPACT ENGINE BRAKE WITH PRESSURE-CONTROL RESET

A compression-release engine brake system operating an exhaust valve of an engine during a compression-release engine braking operation. The compression-release brake system comprises an exhaust rocker arm and a brake reset device disposed in a reset bore formed in the exhaust rocker arm. The brake reset device comprises a reset check valve, a slider-piston slidably disposed in the reset bore and an external slider bias spring biasing the piston foot away from the brake reset device. The external slider bias spring is disposed outside the reset bore and around the piston-slider. The brake reset device permits pressurized hydraulic fluid to flow from a supply conduit to a reset conduit to supply a brake actuation piston when the reset check valve is open. The actuation piston extends and engages the exhaust valve toward the end of a compression stroke of the internal combustion engine, and the brake reset device resets. 1. A compression-release engine brake system for effectuating a compression-release engine braking operation in connection with an internal combustion engine comprising at least one exhaust valve and at least one exhaust valve spring exerting a closing force on the at least one exhaust valve to urge the at least one exhaust valve into a closed position , the engine being a four stroke piston cycle comprising an intake stroke , a compression stroke , an expansion stroke and an exhaust stroke , the compression-release system comprising a lost motion exhaust rocker assembly comprising:an exhaust rocker arm;an actuation device including an actuation piston slidably disposed in an actuation bore formed in the exhaust rocker arm and movable between retracted and extended positions, the actuation device operatively associated with the at least one exhaust valve to unseat the at least one exhaust valve from the closed position; anda reset device including a reset check valve disposed in a reset bore in the exhaust rocker arm, a slider-piston slidably disposed ...