Fuel injection system

A fuel injector is provided in a cylinder block of a spark-ignition direct injection engine. The fuel injector is arranged in such a manner that a fuel injection port is closed by a piston of the engine when the piston is positioned at a top dead center. The fuel injection port is opened when the piston is positioned at a specified position which is far from the top dead center by a specified distance.

Piston of engine

A piston 1 is employed in an engine 50 where a tumble flow is generated within a combustion chamber 53. The piston 1 includes: a top ring channel 3; and a portion 10 of an outer circumferential portion of a top surface, the portion 10 positioned opposite to an adjacent cylinder of the engine 50, the portion 10 having a raised shape so as not to expose a position P, of a bore wall surface, facing the top ring channel 3 face in the top dead center during at least a period from a time when the piston 1 is positioned at a compression top dead center to a time when a quantity of heat transfer in the combustion chamber 53 is the highest.

Engine and cylinder with gas exchange through the cylinder wall

An engine cylinder with a piston and at least one, preferably two or four, cam-operated valves leading to the combustion chamber. A valve seat of the valve is formed in the cylinder wall immediately laterally adjacent to the cylinder bore or to the cylinder chamber. The valve axis and the cylinder axis enclose an acute angle A of 5°≦A≦25°, preferably 10°≦A≦20°. The axis of the inlet channel or the outlet channel leading to the valve seat in a plane defined by the valve axis and the cylinder axis is inclined at an angle B of 25°≦B≦65°, preferably 40°≦B≦50° to the valve axis.

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.

Internal combustion engine

An internal combustion engine ( 1 ), preferably for a motor vehicle, having at least one cylinder ( 2 ) which encloses a combustion chamber ( 3 ) and in which a piston ( 4 ) is situated in such a way that it may perform a stroke movement, and having at least one injector ( 5 ) per cylinder for injecting fuel into the combustion chamber ( 3 ). The respective injector ( 5 ) has multiple injection openings ( 9, 10 ) through which the fuel exits from the injector ( 5 ) and enters into the combustion chamber ( 3 ). To be able to react more fuel, first injection openings ( 9 ) and second injection openings ( 10 ) are situated relative to one another in such a way that first injection jets ( 15 ) from the first injection openings ( 9 ) reach the piston ( 4 ) essentially without contacting second injection jets ( 18 ) from the second injection openings ( 10 ).

SPARK-IGNITION INTERNAL COMBUSTION ENGINE

A spark-ignition internal combustion engine includes a pent roof type combustion chamber, intake valves, exhaust valves, ignition plug, and an airflow guide member. The airflow guide member is provided on a housing of the ignition plug or a wall surface of at least one of pair of roofs. The airflow guide member is configured to deflect airflow that passes through the discharge gap at the time of ignition, in a direction that is inclined relative to a reference direction perpendicular to a line of intersection of wall surfaces of the pair of roofs as viewed in a direction of a center axis of a cylinder. A connecting portion of the ignition plug is located outside a direction of the airflow deflected by the airflow guide member. 1. A spark-ignition internal combustion engine comprising:a combustion chamber having a pair of roofs that are inclined so as to be opposed to each other;at least one intake valve disposed on one of the pair of roofs;at least one exhaust valve disposed on the other of the pair of roofs;an ignition plug including a plug body, a center electrode and a ground electrode, the plug body being mounted in a cylinder head at a top of the combustion chamber at which the pair of roofs intersect with each other, the center electrode being provided on the plug body, the ground electrode including an opposed portion and a connecting portion, the opposed portion being opposed to the center electrode via a discharge gap in an axial direction of the plug body, the connecting portion connecting the opposed portion with a housing of the plug body; andan airflow guide member provided on the housing or a wall surface of at least one of the pair of roofs, the airflow guide member being configured to deflect airflow that passes through the discharge gap at the time of ignition, in a direction that is inclined relative to a reference direction that is perpendicular to a line of intersection of wall surfaces of the pair of roofs as viewed in a direction of a center ...

CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

An upper part of FIG. represents a catalyst warming-up control when a normal fuel is used, and a lower part of FIG. represents the catalyst warming-up control when a heavy fuel is used. As understood from a comparison between the upper part and the lower part of FIG. the start timing of the ignition period and the total injection amount of the injector in each cycle when the heavy fuel is used are the same as those when the normal fuel is used, though the ratio of the intake stroke injection and the expansion stroke injection to the total injection amount of the injector is changed to increase the fuel amount of the expansion stroke injection as compared with the case where the normal fuel is used. 1. A control device for an internal combustion engine , the internal combustion engine comprising:an injector which is provided in an upper part of a combustion chamber and is configured to inject fuel from a plurality of injection holes into a cylinder;a spark plug which is configured to ignite an air-fuel mixture in the cylinder using a discharge spark, the spark plug being provided on a downstream side of the fuel injected from the plurality of injection holes and above a contour surface of a fuel spray pattern which is closest to the spark plug among the fuel spray patterns injected from the plurality of injection holes; andan exhaust gas cleaning catalyst which is configured to clean an exhaust gas from the combustion chamber,wherein in order to activate the exhaust gas cleaning catalyst, the control device is configured to control the spark plug so as to generate the discharge spark in an ignition period retarded from a compression top dead center, and control the injector so as to perform first injection at a timing advanced from the compression top dead center and second injection at a timing retarded from the compression top dead center, the second injection being performed so that an injection period overlaps with at least a part of the ignition period, andthe ...

CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

A control device is configured to perform, when it is estimated that a combustion fluctuation increases, estimation related to an ignition delay for initial flame generated from a discharge spark and an air-fuel mixture containing fuel spray injected by intake stroke injection. When it is estimated that the ignition delay for the initial flame is increased from that before the increase in the combustion fluctuation, an injection amount in expansion stroke injection is reduced in a next time cycle. When it is estimated that the ignition delay for the initial flame is reduced from that before the increase in the combustion fluctuation, the injection amount in expansion stroke injection is increased in a next time cycle. 1. A control device for controlling an internal combustion engine , the internal combustion engine comprising:an injector which is provided in an upper part of a combustion chamber and is configured to inject fuel directly into a cylinder;a spark plug which is configured to ignite an air-fuel mixture in the cylinder using a discharge spark, the spark plug being provided in the upper part of the combustion chamber and on a downstream side of the injector in a flow direction of a tumble flow formed in the combustion chamber, and being located above a contour surface of a fuel spray pattern injected from the injector toward the spark plug; andan exhaust gas cleaning catalyst which is configured to clean an exhaust gas from the combustion chamber,wherein in order to activate the exhaust gas cleaning catalyst, the control device is configured to control the spark plug so as to generate a discharge spark in an ignition period retarded from a compression top dead center, and control the injector so as to perform a first injection at a timing advanced from the compression top dead center and a second injection at a timing retarded from the compression top dead center, the second injection being performed so that an injection period overlaps with at least a ...

CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

An intake stroke injection and a compression stroke injection are performed during catalyst warm-up control (upper section in FIG. ). During the catalyst warm-up control, a discharge period at an electrode portion is set on a retard side of compression top dead center, and an expansion stroke injection is performed during the discharge period. However, when a distance between a spray contour surface and the electrode portion increases, an additional injection (first injection) is performed in advance of the expansion stroke injection (second injection) (lower section in FIG. ). The additional injection is performed at a timing that is on the retard side of compression top dead center and is on an advance side relative to a start timing of the discharge at the electrode portion. 1. A control device for controlling an internal combustion engine , the internal combustion engine comprising:an injector which is provided in an upper portion of a combustion chamber and is configured to inject fuel directly into a cylinder;a spark plug which is configured to ignite an air-fuel mixture inside a cylinder using a discharge spark that is generated at an electrode portion, and which is provided at a position that is at the upper portion of the combustion chamber and is on a downstream side relative to the injector in a flow direction of a tumble flow that is formed inside the combustion chamber, and is provided so that a position of the electrode portion is above a contour surface of a fuel spray that is injected toward the spark plug from the injector; andan exhaust gas purification catalyst which is configured to purify exhaust gas from the combustion chamber;the control device which is configured to control at least fuel injection by the injector and a discharge at the electrode portion by the spark plug,wherein the control device is further configured to:control the injector so as to perform an intake stroke injection and an expansion stroke injection that activate the ...

COMBUSTION GAS INJECTOR ASSEMBLY AND METHOD

The invention relates to a combustion gas injector assembly () comprising a combustion gas injector () having groups () of combustion gas nozzle openings distributed around the periphery, each group having at least one combustion gas nozzle opening (), a combustion gas nozzle valve member () of the combustion gas injector (), which member can be controlled in the open position and closed position, is associated with each group () of combustion gas nozzle openings, in order to selectively discharge the combustion gas via the at least one combustion gas nozzle opening (). The combustion gas injector assembly () is configured to control the combustion gas nozzle valve members () successively with a predetermined time offset (T) into the closed position. 1. A combustion gas injector assembly comprising a combustion gas injector , which has combustion gas nozzle opening groups distributed over a circumference , each of which has at least one combustion gas opening , wherein a respective combustion gas nozzle opening group is dedicated to a combustion gas nozzle valve element of the combustion gas injector that can be closed and opened for selective combustion gas injection via its at least one combustion gas nozzle opening , wherein the combustion gas injector assembly is configured to successively close the combustion gas nozzle valve elements with a predetermined time offset.2. The combustion gas injector assembly of claim 1 , wherein the combustion gas injector assembly is configured to successively close the combustion gas nozzle valve elements along the circumference with the predetermined time offset.3. The combustion gas injector assembly of claim 1 , wherein the combustion gas injector assembly is configured to successively open the combustion gas nozzle valve elements with a predetermined opening time offset.4. The combustion gas injector assembly of claim 1 , wherein the combustion gas injector assembly is configured to set the predetermined time offset to ...

Internal combustion engine

The present embodiment relates to an internal combustion engine having an anodic oxide coating formed on at least a portion of an aluminum-based wall surface facing a combustion chamber. The anodic oxide coating has a plurality of nanopores extending substantially in the thickness direction of the anodic oxide coating, a first micropore extending from the surface toward the inside of the anodic oxide coating, and a second micropore present in the inside of the anodic oxide coating; the surface opening diameter of the nanopores is 0 nm or larger and smaller than 30 nm; the inside diameter of the nanopores is larger than the surface opening diameter; the film thickness of the anodic oxide coating is 15 μm or larger and 130 μm or smaller; and the porosity of the anodic oxide coating is 23% or more.

Multi-Fuel Combustion Methods, Devices and Engines Using the Same

This invention discloses a combustion method, which is for an internal combustion engine, which utilizes variable spray patterns matched with a combustion chamber composing of multiple connected spaces based on injection timings and engine loads. This invention provides means to control propagation paths of combustion reaction radicals and control pressure rise rate, and also provides means to promote stratification of premixed charges. An internal combustion engine utilizing the disclosed combustion methods is also disclosed.

Fuel injector spray pattern

A fuel injector having an injector axis, comprising a first nozzle aiming in a first radial direction; a first nozzle pair aiming in radial directions each equally angled relative to the first direction, closest to the first radial direction, and having a longest radial offset; a nozzle second pair in radial directions each equally angled relative to the first direction; and another nozzle aiming opposite the first radial direction and having a shortest radial offset.

SPARK-IGNITION INTERNAL COMBUSTION ENGINE

In a spark-ignition internal combustion engine in which a protrusion including an intake-side inclined surface and an exhaust-side inclined surface is formed on a top surface of a piston, and a cavity is formed in the protrusion at a position associated with a spark plug, the intake-side inclined surface and the exhaust-side inclined surface are formed in such a way that an angle defined by an orthogonal plane orthogonal to a center axis of a cylinder and the exhaust-side inclined surface) is smaller than an angle defined by the orthogonal plane and a valve head bottom surface of an exhaust valve, and an inclination angle difference between the exhaust-side inclined surface and the valve head bottom surface of the exhaust valve is larger than an inclination angle difference between the intake-side inclined surface and a valve head bottom surface of an intake valve by 3 degrees or larger. 1. A spark-ignition internal combustion engine comprising:a cylinder;a piston disposed to be reciprocatively movable within the cylinder;a cylinder head disposed above the cylinder, and configured to form a pent-roof combustion chamber in cooperation with an inner peripheral surface of the cylinder and a top surface of the piston;a spark plug disposed in the cylinder head in such a way as to face the combustion chamber;an intake port and an exhaust port formed in the cylinder head in such a way as to open in a ceiling surface of the combustion chamber;an intake valve disposed in the cylinder head in such a way as to open and close the intake port; andan exhaust valve disposed in the cylinder head in such a way as to open and close the exhaust port, whereina protrusion is formed on a top surface of the piston,the protrusion includes an intake-side inclined surface inclined along an intake-side ceiling surface of the combustion chamber and a valve head bottom surface of the intake valve, and an exhaust-side inclined surface inclined along an exhaust-side ceiling surface of the ...

FUEL INJECTION CONTROL DEVICE FOR ENGINE

A fuel injection control device for an engine is provided. A swirl generator generates a swirl flow inside a combustion chamber. A fuel injector with multiple nozzle holes injects fuel into the combustion chamber, and forms a lean mixture gas inside the combustion chamber. An spark plug ignites the lean mixture gas to cause a portion of the mixture gas to start combustion accompanied by flame propagation, and then combusts by self-ignition. The fuel injector has first and second nozzle holes, and a first atomized fuel spray injected from the first nozzle hole and a second atomized fuel spray injected from the second nozzle hole separate from each other by the swirl flow. The fuel injector sequentially performs a first injection and a second injection in an intake stroke. The controller makes an injection amount of the second injection greater than that of the first injection. 1. A fuel injection control device , comprising:an engine having a cylinder forming a combustion chamber;a swirl generator attached to the engine and configured to generate a swirl flow inside the combustion chamber;a fuel injector with multiple nozzle holes, attached to the engine and configured to inject fuel into the combustion chamber through the nozzle holes;a spark plug attached to the engine and configured to ignite a mixture gas inside the combustion chamber; anda controller connected to the swirl generator, the fuel injector, and the spark plug, and configured to output respective control signals to the swirl generator, the fuel injector, and the spark plug,wherein the fuel injector forms the mixture gas leaner than a stoichiometric air-fuel ratio inside the combustion chamber in response to the respective control signal,wherein the spark plug ignites the lean mixture gas at a given timing in response to the respective control signal to cause a portion of the mixture gas to start combustion accompanied by flame propagation, and the remaining unburnt mixture gas then combusts by self- ...

FUEL INJECTION CONTROL DEVICE FOR ENGINE

A fuel injection control device for an engine is provided. A fuel injector with multiple nozzle holes forms a lean mixture gas inside a combustion chamber, a spark plug ignites to cause the mixture gas to start combustion accompanied by flame propagation, then combust by self-ignition. A first atomized fuel spray injected from a first nozzle hole and a second atomized fuel spray injected from a second nozzle hole separate from each other by a swirl flow, and a third atomized fuel spray injected from a third nozzle hole and a fourth atomized fuel spray from a fourth nozzle hole approach each other by the swirl flow so that a first area and a second area where mixture gas is richer are formed inside the combustion chamber. The fuel injector sequentially performs first, second, and third injections with an injection interval therebetween in an intake stroke. 1. A fuel injection control device , comprising:an engine having a cylinder forming a combustion chamber;a swirl generator attached to the engine and configured to generate a swirl flow inside the combustion chamber;a fuel injector with multiple nozzle holes, attached to the engine and configured to inject fuel into the combustion chamber through the nozzle holes;a spark plug attached to the engine and configured to ignite a mixture gas inside the combustion chamber; anda controller connected to the swirl generator, the fuel injector, and the spark plug, and configured to output respective control signals to the swirl generator, the fuel injector, and the spark plug,wherein the fuel injector forms the mixture gas leaner than a stoichiometric air-fuel ratio inside the combustion chamber in response to the respective control signal,wherein the spark plug ignites the lean mixture gas at a given timing in response to the respective control signal to cause a portion of the mixture gas to start combustion accompanied by flame propagation, and the remaining unburnt mixture gas then combusts by self-ignition,wherein the ...

FUEL INJECTION CONTROL DEVICE FOR ENGINE

A fuel injection control device for an engine is provided. A swirl generator generates a swirl flow inside a combustion chamber. A fuel injector with multiple nozzle holes injects fuel into the combustion chamber, and forms a lean mixture gas inside the combustion chamber. An spark plug ignites the lean mixture gas to cause the mixture gas to start combustion accompanied by flame propagation, and then combust by self-ignition. A first atomized fuel spray injected from a first nozzle hole and a second atomized fuel spray injected from a second nozzle hole separate from each other by the swirl flow. The fuel injector sequentially performs first and second injections in an intake stroke. A ratio of an injection amount of the second injection to the entire amount of fuel required per cycle is increased as an engine load increases. 1. A fuel injection control device , comprising:an engine having a cylinder forming a combustion chamber;a swirl generator attached to the engine and configured to generate a swirl flow inside the combustion chamber;a fuel injector with multiple nozzle holes, attached to the engine and configured to inject fuel into the combustion chamber through the nozzle holes;a spark plug attached to the engine and configured to ignite a mixture gas inside the combustion chamber; anda controller connected to the swirl generator, the fuel injector, and the spark plug, and configured to output respective control signals to the swirl generator, the fuel injector, and the spark plug,wherein the fuel injector forms the mixture gas leaner than a stoichiometric air-fuel ratio inside the combustion chamber in response to the respective control signal,wherein the spark plug ignites the lean mixture gas at a given timing in response to the respective control signal to cause a portion of the mixture gas to start combustion accompanied by flame propagation, and the remaining unburnt mixture gas then combusts by self-ignition,wherein the fuel injector has at least a ...

FUEL INJECTION CONTROL DEVICE FOR ENGINE

A fuel injection control device for an engine is provided. A swirl generator generates a swirl flow inside a combustion chamber. A fuel injector with multiple nozzle holes injects fuel into the combustion chamber, and forms a lean mixture gas inside the combustion chamber. A spark plug ignites the lean mixture gas to cause a portion of the mixture gas to start combustion accompanied by flame propagation, and then combusts by self-ignition. The fuel injector has first and second nozzle holes, and a first atomized fuel spray injected from the first nozzle hole and a second atomized fuel spray injected from the second nozzle hole separate from each other by the swirl flow. The fuel injector performs the fuel injection in an intake stroke, and retards a start timing of the injection when an engine load is high compared to that when the load is low. 1. A fuel injection control device , comprising:an engine having a cylinder forming a combustion chamber;a swirl generator attached to the engine and configured to generate a swirl flow inside the combustion chamber;a fuel injector with multiple nozzle holes, attached to the engine and configured to inject fuel into the combustion chamber through the nozzle holes;a spark plug attached to the engine and configured to ignite a mixture gas inside the combustion chamber; anda controller connected to the swirl generator, the fuel injector, and the spark plug, and configured to output respective control signals to the swirl generator, the fuel injector, and the spark plug,wherein the fuel injector forms the mixture gas leaner than a stoichiometric air-fuel ratio inside the combustion chamber in response to the respective control signal,wherein the spark plug ignites the lean mixture gas at a given timing in response to the respective control signal to cause a portion of the mixture gas to start combustion accompanied by flame propagation, and the remaining unburnt mixture gas then combusts by self-ignition,wherein the fuel injector ...

FUEL INJECTION DEVICE

An object of the present invention is to provide a fuel injection device in which fuel sprays hardly adhere to an intake valve, a wall surface in an engine cylinder, or a piston. 1. A fuel injection device including a valve body and a seat surface to perform injection and sealing of fuel cooperatively and a plurality of injection holes of which inlet opening surfaces are formed on the seat surface , whereina first injection hole and a second injection hole arranged closest to the first injection hole, which configure the plurality of injection holes, are configured such thatthe first injection hole is larger than the second injection hole in an injection hole angle to be an angle formed by a normal direction of the seat surface and a center axis of the injection hole andthe second injection hole is larger than the first injection hole in an area of a cross-section perpendicular to the center axis of the injection hole.2. The fuel injection device according to claim 1 , wherein the second injection hole has two injection holes arranged at positions sandwiching the first injection hole in a circumferential direction around a center of the seat surface.3. The fuel injection device according to claim 2 , whereinthe plurality of injection holes include at least one injection hole in addition to the first injection hole and the second injection hole andamong all injection holes included in the plurality of injection holes, the injection hole angle in the first injection hole is largest and the area of the cross-section perpendicular to the center axis of the injection hole in the first injection hole is smallest.4. The fuel injection device according to claim 2 , whereinthe plurality of injection holes include, in addition to the first injection hole and the second injection hole, a third injection hole and two fourth injection holes arranged to sandwich the third injection hole in the circumferential direction around the center of the seat surface andthe area of the ...

Fuel Injection Valve Control Device

A fuel injection valve capable of forming a homogeneous air-fuel mixture in homogeneous combustion at a low engine speed and a control device thereof are provided. According to the present invention, a fluid injection valve that is configured separately from a fuel injection valve and has a function of injecting a fluid is provided and a control device of the fuel injection valve includes a control unit that performs control such that fuel is injected from the fuel injection valve and then controls the fluid injection valve such that the fluid is injected from the fluid injection valve and the fuel injected from the fuel injection valve is stirred.

Spark-ignition internal combustion engine

In a spark-ignition internal combustion engine in which a protrusion including an intake-side inclined surface and an exhaust-side inclined surface is formed on a top surface of a piston, and a cavity is formed in the protrusion at a position associated with a spark plug, the intake-side inclined surface and the exhaust-side inclined surface are formed in such a way that a ratio of a length of the exhaust-side inclined surface with respect to a length of the intake-side inclined surface is 1.25 or larger in a cross section passing through a center axis of the piston and orthogonal to an axis direction of a crankshaft.

Piston and Bowl for Gasoline Direct Injection Compression Ignition (GDCI)

A piston for use in a GDCI engine cooperates with the wall of a cylinder defined in the engine and with a cylinder head to define a combustion chamber. The surface of the piston that faces the cylinder head defines a bowl that is configured to receive fuel that is dispensed from a fuel injector that is located in the cylinder head substantially along the central axis of the cylinder. The bowl is configured such that substantially all of the injected fuel associated with a combustion event reaches a localized equivalence ratio greater than 0.0 and less than or equal to 1.2 at a time immediately preceding initiation of the combustion event.

FUEL INJECTION DEVICE OF ENGINE

A control device of an engine including a cylinder, a piston, a cylinder head, and a combustion chamber, is provided. The device includes intake and exhaust ports, a swirl control valve, a fuel injection valve attached to the cylinder head to be oriented into the combustion chamber and having first and second nozzle ports, and a control unit. The control unit includes a processor configured to execute a swirl opening controlling module to control the swirl control valve to have a given opening at which a swirl ratio inside the combustion chamber becomes 2 or above, and a fuel injection timing controlling module to control the fuel injection valve to inject fuel at a given timing at which the swirl ratio becomes 2 or above and a swirl flow from a lower portion to a higher portion of the combustion chamber in a side view occurs. 1. A control device of an engine including a cylinder , a piston for reciprocating inside the cylinder along a center axis thereof , a cylinder head , and a combustion chamber formed by the cylinder , the piston , and the cylinder head , comprising:an intake port configured to introduce intake air into the combustion chamber;an exhaust port configured to discharge exhaust gas from the combustion chamber;a swirl control valve provided in an intake passage connected to the intake port;a fuel injection valve attached to the cylinder head, disposed to be oriented into the center of the combustion chamber in a plan view thereof, and having a first nozzle port with a nozzle port axis extending to the exhaust port side in the plan view and a second nozzle port with a nozzle port axis extending to the intake port side in the plan view; anda control unit connected to the fuel injection valve and the swirl control valve and configured to output a control signal to the fuel injection valve and the swirl control valve, respectively, the control unit including a processor configured to execute a swirl opening controlling module to output the control signal ...

CONTROL SYSTEM FOR COMPRESSION-IGNITION ENGINE

A control device for a compression-ignition engine is provided, which includes an engine having a plurality of cylinders, spark plug, a fuel injector, and a control unit connected to the spark plug and the fuel injector. The control unit causes the engine to perform an all-cylinder operation when the engine operates at a load above a given load, and perform a reduced-cylinder operation at a load below the given load. In the reduced-cylinder operation, the fuel injector injects fuel to one or some of the cylinders to generate mixture gas, the spark plug ignites the mixture gas, and the engine starts, at an air-fuel ratio larger than a stoichiometric air-fuel ratio and a large compression ratio, SI combustion in which the mixture gas is ignited to combust by flame propagation, and then perform CI combustion in which unburned mixture gas ignites by self-ignition. 1. A control system for a compression-ignition engine , comprising:an engine having a plurality of cylinders formed with a combustion chamber, respectively;a spark plug disposed in each of the combustion chambers;a fuel injector disposed to be oriented into each combustion chamber; anda control unit including a processor connected to the spark plug and the fuel injector, and configured to output a control signal to the spark plug and the fuel injector, respectively, whereinwhen the engine operates at a load above a given load, the control unit causes the engine to perform an all-cylinder operation by supplying fuel to all the plurality of cylinders, and when the engine operates at a load below the given load, the control unit causes the engine to perform a reduced-cylinder operation by supplying the fuel to one or some of the plurality of cylinders, andin the reduced-cylinder operation, the control unit controls the fuel injector to inject the fuel to the one or some of the plurality of cylinders to generate a mixture gas, controls the spark plug to ignite the mixture gas, and causes the engine to start, at an ...

Control device for engine

A control device for an engine is provided, which includes a fuel injector attached to the engine, a spark plug disposed to be oriented into a combustion chamber, a swirl control valve provided in an intake passage, and a controller connected to the fuel injector, the spark plug, and the swirl control valve and configured to control the fuel injector, the spark plug, and the swirl control valve. The swirl control valve closes in a given operating state of the engine. The fuel injector injects fuel after the swirl control valve is closed, between intake stroke and an intermediate stage of compression stroke. The fuel injector injects the fuel after the first fuel injection. The spark plug performs the ignition after the second fuel injection so that the mixture gas starts combustion by flame propagation and then unburned mixture gas self-ignites.

CONTROL SYSTEM FOR PRE-MIXTURE COMPRESSION-IGNITION ENGINE

A control system for a pre-mixture compression-ignition engine is provided, configured such that in a first combustion mode, the control unit controls the fuel injection valve to have a fuel amount within a mixture gas in an outer circumferential portion of the combustion chamber larger than in the center portion, the swirl generating part to generate a swirl flow in the outer circumferential portion, and the spark plug to ignite the mixture gas in the center portion. In a second combustion mode, the control unit controls the fuel injection valve to start a fuel injection on intake stroke so that the mixture gas is formed in the entire combustion chamber, the swirl generating part so that a swirl flow becomes weaker than in the first combustion mode, and the spark plug to ignite the mixture gas before CTDC. 1. A control system for a pre-mixture compression-ignition engine , comprising:an engine formed with a combustion chamber and provided with an intake port opening into the combustion chamber;a spark plug disposed in a center portion of the combustion chamber;a fuel injection valve disposed to be oriented into the combustion chamber;a swirl generating part configured to generate a swirl flow in a circumferential direction in an outer circumferential portion of the combustion chamber located around the center portion, by a flow of intake air from the intake port; anda control unit connected to the spark plug, the fuel injection valve, and the swirl generating part and configured to output a control signal to the spark plug, the fuel injection valve, and the swirl generating part, respectively, an operating range determining module to determine an operating range of the engine; and', 'a combustion mode selecting module to select one of a first combustion mode in which SI combustion where a mixture gas formed in the combustion chamber combusts by flame propagation starts and CI combustion where unburned mixture gas combusts by compression ignition is then performed, ...

Gaseous fuel combustion apparatus for an internal combustion engine

Diesel-cycle engines are known to have greater power, torque and efficiency compared to Otto-cycle engines of like displacement. When the fuel is a gaseous fuel, such as natural gas, a pilot fuel (such as diesel) is normally required to assist with ignition in a gaseous fuelled Diesel-cycle engine. It would be advantageous to reduce the power, torque and efficiency gap between a Diesel-cycle engine and a gaseous fuelled Otto-cycle engine. A combustion apparatus for a gaseous fuelled internal combustion engine comprises a combustion chamber defined by a cylinder bore, a cylinder head and a piston reciprocating within the cylinder bore. A diameter of the cylinder bore is at least 90 mm and a ratio between the diameter and a stroke length of the piston is at most 0.95. There is at least one intake passage for delivering a charge to the combustion chamber, and at least one intake valve is configured in the cylinder head and cooperates with the intake passage to create a predominant tumble flow motion in the combustion chamber.

SELF COOLED ENGINE

Self-cooled engine including a cylinder, a cylinder head and a turbo-piston which freely reciprocates inside the cylinder. The cylinder head has a valve that achieves circumferential suction of air-fuel mixture into the cylinder. The valve mechanism is closed and opened by cylindrical cam by means of cam shaft. Circumferential suction of air-fuel mixture enables the cylinder to cool itself and to burn the fuel at the energy center effectively. The force of incoming stream of air-fuel mixture rotates the impeller on the piston which acts as a fan to cool the cylinder walls. The impeller blades deflect the flame from reaching the cylinder walls and acts as a thermal barrier between the energy center and cylinder walls. The high intensity compression swirl (HICS) created at the end of the compression stroke to ensure that the fuel combustion is efficient and instantaneous release of maximum energy. 1. An engine having at least one cylinder comprisinga cylinder head body comprising a Sunflower mechanism, an exhaust valve mechanism; anda reciprocating turbo-piston assembly movable through a stroke in the cylinder.2. The engine as claimed in claim 1 , wherein;the cylinder head body comprises:an inlet manifold and an exhaust manifold are disposed on the cylindrical surface of the cylinder head body;a valve lock housing on the cylindrical surface of the cylinder head body to accommodate a Sunflower valve upper guide lock, a Sunflower valve lock, a Sunflower valve lower guide lock, Sunflower valve assembly cover and a cylindrical cam follower;a bracket provides bearing support for the camshaft and pushrod;an annular protrusion disposed on the outer cylindrical surface of the exhaust chamber to stop the Sunflower valve assembly movement along the cylinder axis;a recess below the said annular protrusion to receive Sunflower assembly circlip disposed on the outer cylindrical surface of the exhaust chamber to stop the Sunflower valve assembly movement along the cylinder axis; ...

GASOLINE DIRECT INJECTION ENGINE

A gasoline direct injection engine is provided in which fuel is directly injected by an injector disposed at a side of an exhaust port. The gasoline direct injection engine includes an injector that directly injects fuel into a combustion chamber, a spark plug, an intake port, an exhaust port, and a piston head The intake port and the exhaust port are disposed to face each other based on an installation location of the spark plug, and the injector is disposed at a side of the exhaust port. 1. A gasoline direct injection engine , comprising:an injector configured to directly inject fuel into a combustion chamber,a spark plug;an intake port configured to supply air to the combustion chamber,an exhaust port configured to discharge exhaust gas generated in the combustion chamber to an outside, wherein the injector is disposed at a side of the exhaust port; anda piston head,wherein the intake port and the exhaust port are disposed to face each other based on an installation location of the spark plug.2. The gasoline direct injection engine of claim 1 , wherein an installation angle of the injector is less than about 45° and the installation angle is an angle defined by a central imaginary line of the injector and an upper surface of the piston head3. The gasoline direct injection engine of claim 2 , wherein the intake port includes an intake pipe through which air supplied to the combustion chamber flows and an intake valve configured to open and close the intake pipe claim 2 , and an installation angle of the intake pipe is greater than the installation angle of the injector.4. The gasoline direct injection engine of claim 1 , wherein an upper surface of the piston head includes a flow groove to return all or some of a flow of the fuel injected from the injector toward the exhaust port.5. The gasoline direct injection engine of claim 4 , wherein the flow groove is a circular or elliptical groove formed on the upper surface of the piston head claim 4 , and the flow ...

Fuel injection apparatus

A fuel injection apparatus includes: an injector disposed at a position offset from an ignition plug toward an intake port and injecting a fuel spray toward a crown surface of a piston, and an injection controller causing the injector to perform injection in accordance with an amount and timing of fuel injection preset in accordance with an operating state of an engine. The piston includes: a first recess formed by recessing a central portion of the crown surface and a second recess formed by recessing part of the first recess on an injector side further than the first recess. The injector injects 50% or more of fuel to be injected for the last fuel injection toward the second recess during a compression stroke, and injects part of the fuel to be injected for the last fuel injection toward an area of the first recess other than the second recess.

Boosted engine

A boosted engine is provided, which includes an engine body formed with a combustion chamber, a spark plug, a fuel injection valve, a booster, a boost controller, and a control unit including an operating range determining module and a compression end temperature estimating module. In a high load range, the fuel injection valve and the spark plug are controlled so that a mixture gas inside the combustion chamber starts combustion through flame propagation by ignition of the spark plug, and unburned mixture gas then combusts by compression ignition, and the boost controller is controlled to bring the booster into a boosting state. When a gas temperature inside the combustion chamber exceeds a given temperature at CTDC, the fuel injection valve is controlled so that a fuel injection end timing occurs on a compression stroke, and the spark plug is controlled so that the mixture gas is ignited after CTDC.

Combustion control device for compression autoignition engine

A combustion control device for a compression autoignition engine includes an engine, a state quantity setting device, a spark plug, a controller, and a sensor. The spark plug receives a control signal from the controller and ignites air-fuel mixture at predetermined ignition timing such that the ignited air-fuel mixture is combusted by flame propagation and then unburned air-fuel mixture in a combustion chamber is combusted by autoignition. The controller outputs a control signal to an injector such that, in a compression stroke, fuel is injected at specific timing at which a line obtained by extending an axis of each hole of the injector overlaps with a specific portion including an opening edge of a cavity in an upper surface of a piston.

Internal combustion engine

An internal combustion engine includes: a piston guided by a cylinder to reciprocate along a cylinder axis and forming a combustion chamber with a crown surface facing a cylinder head; and a fuel injection valve having an injection port facing the combustion chamber and injecting fuel to a forward tumble flow in the combustion chamber. A ridge formed on the crown surface rises toward a ceiling surface side relative to a reference plane, orthogonal to the cylinder axis and including an outer peripheral edge of the crown surface, and has a ridge line formed by a curved surface to surround a recessed part. The recessed part is recessed toward a center of the crown surface in a direction orthogonal to a virtual plane including the cylinder axis and parallel to a rotation axis of a crankshaft, and is recessed toward the center in an axial direction of the crankshaft.

Piston

In a piston of an internal combustion engine in which a recessed portion that holds an intake air swirling flow is formed on a crown surface of the piston, the crown surface includes a heat insulating film formation portion having a heat insulating film whose thermal conductivity is lower than a base material of the piston, the heat insulating film whose thermal capacity per volume is smaller than the base material of the piston, and a heat insulating film non-formation portion provided at a position on the more outside of a cylinder bore side of the internal combustion engine than the heat insulating film formation portion, the heat insulating film non-formation portion not having the heat insulating film.

System and method for variable actuation of valves of an internal combustion engine

In an internal combustion engine provided with an electro-hydraulic system for variable actuation of the intake valves of the engine, each cylinder has two intake valves, which are associated with two intake conduits and are controlled by a single cam of a camshaft through a single hydraulic circuit. The communication of the hydraulic actuators of the two intake valves with a discharge channel is controlled by two electrically-actuated control valves, both of an on/off two-position type, arranged in series with each other along a hydraulic line for communication between the a pressure volume and the discharge channel.

Fuel Injection Control Device

An object of the invention is to form a highly homogeneous air-fuel mixture which is not influenced by an engine rotation speed. Therefore, the invention provides a fuel injection control device including a cylinder, a first injector disposed at an upper portion of the cylinder in the axial direction and a center portion thereof in the radial direction, an intake valve disposed at an upper portion of the cylinder in the axial direction and an outer portion thereof in the radial direction in relation to the first fuel injection device, and a second injector supplying fuel from an upper portion of the cylinder in the axial direction and at least an outer portion in the radial direction in relation to the intake valve, in which a rotation speed of the engine is high, a fuel supply amount ratio of the first injector with respect to the second injector is controlled to be larger than that of a case where the rotation speed is low. 1. A fuel injection control device for controlling a fuel injection of an engine , the device comprising a cylinder , a first injector disposed at an upper portion of the cylinder in the axial direction and a center portion thereof in the radial direction , an intake valve disposed at an upper portion of the cylinder in the axial direction and an outer portion thereof in the radial direction in relation to the first fuel injection device , and a second injector supplying fuel from an upper portion of the cylinder in the axial direction and at least an outer portion in the radial direction in relation to the intake valve ,wherein a rotation speed of the engine is high, a fuel supply amount ratio of the first injector with respect to the second injector is controlled to be larger than that of a case where the rotation speed is low.2. The fuel injection control device according to claim 1 ,wherein the second injector is disposed at an upper portion of the cylinder and an outer portion thereof in the radial direction in relation to the intake valve ...

IN-COMBUSTION CHAMBER FLOW CONTROL DEVICE

Provided is an in-combustion chamber flow control device used in an engine having an intake passage connected to an intake opening formed in a ceiling surface of a combustion chamber, at an angle inclined with respect to a direction of an axis of a cylinder. This in-combustion chamber flow control device comprises a plasma actuator () disposed inside the combustion chamber (). The plasma actuator comprises: a dielectric body () disposed along the ceiling surface () of the combustion chamber, at a position closer to a center of the ceiling surface than the intake opening (); an exposed electrode () disposed on one side of the dielectric body facing the combustion chamber; and an embedded electrode () disposed on a side opposite to the exposed electrode across the dielectric body. The embedded electrode is disposed at a position closer to the intake opening than the exposed electrode. 1. An in-combustion chamber flow control device used in an engine comprising a cylindrical cylinder , a piston received in the cylinder slidably with respect to an inner surface of the cylinder , and a cylinder head which is internally formed with an intake passage connected to an intake opening formed in a ceiling surface of a combustion chamber defined by the cylinder head , the cylinder and the piston , at an angle inclined with respect to a direction of an axis of the cylinder , wherein the in-combustion chamber flow control device is designed to control a flow of gas in the combustion chamber , the in-combustion chamber flow control device being characterized in that in-combustion chamber flow control device comprises a plasma actuator disposed inside the combustion chamber , the plasma actuator comprising: a dielectric body disposed along the ceiling surface at a position closer to a center of the ceiling surface than the intake opening; an exposed electrode disposed on one side of the dielectric body facing the combustion chamber; and an embedded electrode disposed on a side ...

IGNITION SOURCE ADAPTED FOR POSITIONING WITHIN A COMBUSTION CHAMBER

An opposed-piston engine optionally contains an ignition system that is at least partially contained within the combustion chamber to enhance the combustion efficiency of a fuel-air mixture within the combustion system. More specifically, the ignition system contains at least one spark plug having an elongated center electrical delivery electrode, and, an elongated ground electrode. Accordingly, the elongated electrodes extend from an area adjacent to the inner periphery of the cylinder to a radially central area within the combustion chamber. Yet further, a cooling jacket is incorporated to provide cooling of the spark plug. 1. An engine comprising:a piston face formed to contain a first recess and a second recess;a first spark plug within a spark plug opening within a cylinder, and at least partially extends into the first recess to provide ignition of a combustive mixture within a combustion chamber formed between two pistons shaped in the same manner.2. The engine as in wherein the first recess comprises a first ridge and a first valley claim 1 , wherein the first spark plug extends into the combustion chamber or valley.3. The engine as in further comprising a second spark plug within a second spark plug opening within the cylinder and extending into a second recess to provide ignition of a combustive mixture within a second combustion chamber formed between two pistons shaped in the same manner as the first chamber.4. An engine comprising:a piston face formed to contain a recess having several contours to form a combustion chamber;a first spark plug located at an edge of the combustion chamber to provide ignition to gases within the combustion chamber that extends across the diameter of a surface of the piston;a second spark located across from the first spark plug and at the edge of the chamber to provide ignition to the gases within the chamber,wherein the first and second spark plugs are symmetrically located across from each other.5. The engine as in ...

Combustion chamber structure for engine

A combustion chamber structure for an engine includes a combustion chamber where SI combustion by spark ignition and CI combustion by self-ignition are conducted. A crown surface includes a cavity recessed to have a bowl-shape; a pair of first raised portions having a mound-shape along a pent roof shape; and a second raised portion provided to protrude at a position orthogonal to a ridge extending direction of the pair of first raised portions. With a height of the first raised portion relative to a height position of a deepest portion of the cavity being represented as H 1 and a height of the second raised portion being represented as H 2 , H 1 /H 2 as a ratio of the height H 1 of the first raised portion to the height H 2 of the second raised portion is set to be in a range of 1.92 or more and 2.75 or less.

COMBUSTION CHAMBER STRUCTURE OF ENGINE

The present invention relates to a combustion chamber structure of an engine configured to inject fuel in a predetermined operation range in a period from a second half of a compression stroke until a first half of an expansion stroke to perform ignition after a compression top dead center. The combustion chamber structure includes: a piston including a cavity; a fuel injection valve provided at a middle portion of the piston; and a spark plug provided at a radially outer side of the middle portion of the piston and an upper side of the cavity. The cavity is formed by a curved surface having curvature that becomes larger as the curved surface extends toward the radially outer side. A tangential direction of an edge end portion of the curved surface intersects with a combustion chamber ceiling radially outward of the spark plug. 1. A combustion chamber structure of an engine configured to inject fuel in a predetermined operation range in a period from a second half of a compression stroke until a first half of an expansion stroke to perform ignition after a compression top dead center ,the combustion chamber structure comprising:a piston including a cavity that is concave downward at a middle portion of an upper surface of the piston;a fuel injection valve provided at a position corresponding to a middle portion of the piston and configured to inject the fuel into the cavity of the piston in the period from the second half of the compression stroke until the first half of the expansion stroke; anda spark plug provided at a position located at a radially outer side of the middle portion of the piston and corresponding to an upper side of the cavity of the piston, the middle portion corresponding to a position where the fuel injection valve is provided, wherein:the cavity of the piston is formed by a curved surface having curvature that becomes larger as the curved surface extends toward the radially outer side; anda tangential direction of an edge end portion of the ...

UNIFLOW SCAVENGING TWO-CYCLE ENGINE

A uniflow scavenging two-cycle engine includes an scavenging port having a swirling guide portion that guides scavenging gas into a cylinder in a direction inclined with respect to a radial direction of the cylinder, and a center guide portion that is provided to be closer to a crank side of the cylinder than the swirling guide portion and guides the scavenging gas further toward the center side of the cylinder than the swirling guide portion. At least a part of the center guide portion faces a piston when the piston is positioned at bottom dead center during the high compression ratio mode, and the center guide portion and the piston do not face each other or an area of facing the piston is smaller than that during the high compression ratio mode when the piston is positioned at bottom dead center during the low compression ratio mode. 1. A uniflow scavenging two-cycle engine that includes an exhaust port formed on one end side of a cylinder in which a piston is reciprocating and a scavenging port formed on the other end side of the cylinder , and that switches between at least two operation modes of a low compression ratio mode and a high compression ratio mode in which top dead center and bottom dead center of the piston is positioned to be closer to the exhaust port side than in the low compression ratio mode ,wherein the scavenging port has:a swirling guide portion that guides scavenging gas from an outside to an inside of the cylinder in a direction inclined with respect to a radial direction of the cylinder, anda center guide portion that is provided to be closer to the other end side of the cylinder than the swirling guide portion and guides the scavenging gas further toward the center side of the cylinder than the swirling guide portion, andwherein at least a part of the center guide portion faces the piston in a case where the piston is positioned at bottom dead center during the high compression ratio mode, and the center guide portion and the piston do ...

GDI ENGINE

A gasoline direct injection (GDI) engine may include: a cylinder block having a cylinder; a cylinder head having an intake port, an intake valve opening and closing the intake port, an exhaust port, and an exhaust valve opening and closing the exhaust port; a piston reciprocating in the cylinder; a combustion chamber defined by the cylinder head, the piston, and an inner wall surface of the cylinder; and a fuel injector injecting a fuel into the combustion chamber. In particular, the combustion chamber is divided into an intake side where the intake port and the intake valve are located, and an exhaust side where the exhaust port and the exhaust valve are located, and a nozzle of the fuel injector is mounted in the cylinder head toward the exhaust side. 1. A gasoline direct injection (GDI) engine , comprising:a cylinder block including at least one cylinder;a cylinder head including at least one intake port, at least one intake valve configured to open and close the at least one intake port, at least one exhaust port, and at least one exhaust valve configured to open and close the at least one exhaust port;a piston configured to reciprocate in the at least one cylinder;a combustion chamber defined by the cylinder head, the piston, and an inner wall surface of the at least one cylinder; anda fuel injector configured to inject a fuel into the combustion chamber,wherein the combustion chamber is divided into an intake side where the at least one intake port and the at least one intake valve are located, and an exhaust side where the at least one exhaust port and the at least one exhaust valve are located, andwherein a nozzle of the fuel injector is mounted in the cylinder head toward the exhaust side.2. The GDI engine according to claim 1 , wherein the cylinder head has a mounting hole in which the nozzle of the fuel injector is mounted claim 1 , andthe mounting hole is inclined at a predetermined angle with respect to a top surface of the piston.3. The GDI engine ...

COMBUSTION CHAMBER STRUCTURE FOR ENGINES

A structure of a combustion chamber for an engine includes a crown surface of a piston, a combustion chamber ceiling surface, an injector and an ignition plug provided on the combustion chamber ceiling surface, and an intake opening and an exhaust opening opened in the combustion chamber ceiling surface. A side where the intake opening is opened is defined as an intake port side, and a side where the exhaust opening is opened is defined as an exhaust port side. An ignition portion of the ignition plug is disposed on the intake port side. The ignition plug is ignited at a timing after the piston passes a compression top dead center. The injector is disposed on the center portion, and is configured to inject fuel toward the exhaust port side. A cavity is provided on the crown surface. A reverse squish flow generation portion is provided in the combustion chamber. 1. A structure of a combustion chamber for a spark ignited engine , comprising:a crown surface of a piston;a combustion chamber ceiling surface formed on a cylinder head;an injector provided on the combustion chamber ceiling surface;an ignition plug provided on the combustion chamber ceiling surface, and including an ignition portion provided in such a way as to face the combustion chamber; andan intake opening and an exhaust opening opened in the combustion chamber ceiling surface, whereina side where the intake opening is opened is defined as an intake port side of the combustion chamber, and a side where the exhaust opening is opened is defined as an exhaust port side of the combustion chamber, with respect to a center portion of the combustion chamber as a reference, in a plan view from one side in a cylinder axis direction,the ignition plug is configured in such a way that the ignition portion is disposed on the intake port side, and that the ignition plug is ignited at a timing after the piston passes a compression top dead center,the injector is disposed on the center portion, and is configured to ...

INTAKE STRUCTURE OF INTERNAL COMBUSTION ENGINE

In an intake structure of an internal combustion engine, on an intake upstream side from a valve seat of an intake port, a convex portion is provided which protrudes to an inside of the intake port in a place near an outer circumferential portion of a cylinder chamber when viewed from an upper side of the cylinder chamber. The convex portion includes an upstream guide surface extending from an apex of the convex portion to the intake upstream side, and a downstream guide surface extending from the apex to an intake downstream side and including a curved surface recessed inside the convex portion at a middle portion thereof. 1. An intake structure of an internal combustion engine , whereinon an intake upstream side from a valve seat of an intake port, a convex portion is provided which protrudes to an inside of the intake port in a place near an outer circumferential portion of a cylinder chamber when viewed from an upper side of the cylinder chamber, and an upstream guide surface extending from an apex of the convex portion to the intake upstream side, and', 'a downstream guide surface extending from the apex to an intake downstream side and including a curved surface recessed inside the convex portion at a middle portion thereof., 'the convex portion includes2. The intake structure of the internal combustion engine according to claim 1 , wherein the apex extends in a direction orthogonal to a flow direction of an intake air which flows through the intake port.3. The intake structure of the internal combustion engine according to claim 1 , wherein two intake ports are provided side by side with respect to one cylinder chamber claim 1 ,the convex portion is provided each of the two intake ports, andan inside of the apex of each of the convex portions is formed to be lower than an outside of the apex.4. The intake structure of the internal combustion engine according to claim 3 , wherein a shape of the convex portion is formed to be linearly symmetrical to a virtual ...

CONTROL SYSTEM FOR COMPRESSION-IGNITION ENGINE

A control system for a compression-ignition engine is provided, which includes an engine having a combustion chamber, an injector configured to supply fuel into the combustion chamber, a spark plug, a swirl valve provided to an intake passage of the engine, and a controller. The controller includes a processor configured to execute a swirl adjusting module to adjust a swirl valve opening to generate a swirl flow inside the combustion chamber, a fuel injection amount controlling module to control fuel injection amounts of pre-injection and post-injection so as to increase a ratio of an injection amount of the post-injection to a total fuel injection amount into the combustion chamber in one cycle as an engine speed increases, and a combustion controlling module to control the spark plug to ignite at a given ignition timing after the swirl generation and fuel injection, so that partial compression-ignition combustion is performed. 1. A control system for a compression-ignition engine , comprising:an engine having a combustion chamber formed by a cylinder, a piston, and a cylinder head;an injector attached to the engine and configured to supply fuel into the combustion chamber;a spark plug disposed to be oriented into the combustion chamber;a swirl valve provided to an intake passage of the engine; and a swirl adjusting module to adjust an opening of the swirl valve to generate a swirl flow inside the combustion chamber;', 'a fuel injection amount controlling module to control fuel injection amounts by the injector, of a pre-injection in which fuel is injected into the combustion chamber and a post-injection in which fuel is injected again after the pre-injection, the fuel injection amount controlling module outputting a control instruction to the injector to increase a ratio of an injection amount of the post-injection to a total amount of fuel to be injected into the combustion chamber in one cycle as an engine speed increases; and', 'a combustion controlling module ...

CONTROL APPARATUS FOR COMPRESSION-IGNITION TYPE ENGINE

An engine control apparatus includes an ignition control section and an injection control section. When the partial compression ignition combustion is carried out, the ignition control section causes an ignition plug to carry out: main ignition in which a spark is generated in a late period of a compression stroke or an initial period of a expansion stroke to initiate the SI combustion; and preceding ignition in which the spark is generated at earlier timing than the main ignition. Also, when the partial compression ignition combustion is carried out, the injection control section causes the injector to inject fuel at such timing that the fuel exists in a cylinder at an earlier time point than the preceding ignition. The energy of the preceding ignition is set to be higher when fuel concentration specified by a fuel concentration specification section is low than when the fuel concentration is high. 1. An apparatus for controlling a compression-ignition type engine that includes:a cylinder; an injector that injects fuel into the cylinder; and an ignition plug that ignites air-fuel mixture, in which fuel injected from injector and air are mixed, and that can carry out partial compression ignition combustion to subject some of the air-fuel mixture to SI combustion by spark ignition using the ignition plug, and subject the rest of the air-fuel mixture to CI combustion by self-ignition, the control apparatus for the compression-ignition type engine comprising:a fuel concentration specification section that specifies fuel concentration as concentration of the fuel existing in the cylinder;an injection control section that controls fuel injection operation by the injector; andan ignition control section that controls ignition operation by the ignition plug,wherein, when the partial compression ignition combustion is carried out, the ignition control section causes the ignition plug to carry out: main ignition in which a spark is generated in a late period of a compression ...

Control device of gasoline direct-injection engine

A control device of a gasoline direct-injection engine is provided. The control device includes an engine body, an injector, and a controller. Within a high load operating range, the controller causes the injector to perform a pre-injection and a post injection. In the pre-injection, the fuel is injected to cause a fuel concentration within an in-cylinder radially peripheral section to be higher than a fuel concentration within an in-cylinder radially central section at a timing for the fuel to ignite. In the post injection, the fuel is injected to cause the fuel concentration within the radially central section to be higher than the fuel concentration within the radially peripheral section at a timing for the fuel to ignite. The timing for the fuel injected in the post injection to ignite is after an oxidative reaction of the fuel injected in the pre-injection occurs and after a compression top dead center.

Method for operating a direct-injection internal combustion engine, and applied-ignition internal combustion engine for carrying out such a method

Systems and methods are provided for operation of fuel injectors within an applied-ignition, direct-injection internal combustion engine. In one example, a needle of a fuel injector is moved from a retracted position to an extended position relative to a plurality of injection holes of a nozzle of the fuel injector, with at least one injection hole being separated from a fuel supply system earlier than each other injection hole. In a partially retracted position, fuel flow along a first side of the needle is decreased relative to fuel flow along a second side of the needle.

Control apparatus for compression-ignition type engine

An engine apparatus includes an ignition control section and an injection control section. When the partial compression ignition combustion is carried out, the ignition control section causes an ignition plug to carry out: main ignition in which a spark is generated in a late period of a compression stroke or an initial period of an expansion stroke to initiate the SI combustion; and preceding ignition in which the spark is generated at earlier timing than the main ignition. Also, when the partial compression ignition combustion is carried out, the injection control section causes the injector to inject fuel at such timing that the fuel exists in a cylinder at an earlier time point than the preceding ignition. Energy of the preceding ignition is set to be lower when a swirl flow is gentle than when the swirl flow is intense.

PISTON AND CYLINDER FOR TWO-STROKE ENGINE

A two-stroke internal combustion engine includes at least one gaseous communication charge passage between a crankcase chamber and a combustion chamber of the engine and a piston to open and close the top end of the transfer passage. The air inlet port to the transfer passage for stratified scavenging is opened and closed by the piston that has passages and cutouts. The charge inlet to the crankcase chamber is opened and closed by the piston. The air inlet passage is substantially asymmetrical to the layout of the transfer passages and are closer to one transfer passage compared to the other. The internal air passage in the piston is substantially parallel to the piston pin and the single air inlet passage is laterally off-set from the air-fuel inlet passage. The transfer passages are cover by plates to make them closed passages having opening at the transfer port in the cylinder and opening in the crankcase chamber for periodical gaseous communication between the crankcase chamber and the combustion chamber. The cover plate is a single piece covering the transfer passage channel along the cylinder and the crankcase. The air channel in the piston is below the piston crown and at least portion is above the piston pin. A spiraling transfer passage in the cylinder cavity is longer than the length of the transfer passage in a conventional stratified two-stroke engine. 296200. The first passage way () of claim 1 , is a passage through the piston pin ().39620016ab. The first passage way () of claim 1 , is a passage way above the piston pin () and in which top wall is the piston crown ().41001030a. First Window () of has outer wall () which has outward (convex) curvature.5. (canceled)6. (canceled)7. (canceled)8. (canceled)9. (canceled)10. (canceled)111696161001009616200969696989816ababacac. A piston () having a passage/air channel () below the piston crown () connecting the two windows (and ) and the air channel () has a wall () above the piston pin (); and at least one or ...

SYSTEMS FOR A PRE-CHAMBER

Methods and systems are provided for a pre-chamber. In one example, a pre-chamber comprises a plurality of slots fluidly coupling it to a primary combustion chamber. The plurality of slots comprising a plurality of corresponding flaps configured to direct gases through the plurality of slots. 1. A system , comprising:a pre-chamber arranged in a volume of a primary combustion chamber, wherein the pre-chamber comprises a plurality of slots and a plurality of flaps shaped identically to the plurality of slots.2. The system of claim 1 , wherein each of the plurality of slots and the plurality of flaps comprises a rectangular shape.3. The system of claim 1 , wherein each flap of the plurality of flaps extends from a long edge of a slot of the plurality of slots.4. The system of claim 1 , wherein the plurality of flaps and the plurality of slots are arranged symmetrically about a protection tube of the primary combustion chamber.5. The system of claim 4 , wherein the plurality of slots extends through an entire thickness of the protection tube.6. The system of claim 5 , wherein the plurality of slots is linear or curved.7. The system of claim 1 , wherein the pre-chamber further comprises a hole arranged at a bottom surface of the pre-chamber claim 1 , equidistant to each slot of the plurality of slots claim 1 , and wherein there are no other inlets or outlets in the pre-chamber except for the plurality of slots and the hole.8. The system of claim 1 , wherein the plurality of slots fluidly couples an interior volume of the pre-chamber to the primary combustion chamber.9. The system of claim 1 , wherein the pre-chamber comprises an ignition device and is free of a fuel injector.10. An engine claim 1 , comprising:a primary combustion chamber comprising a piston and a pre-chamber, wherein the piston is configured to adjust a volume of only the primary combustion chamber, wherein the pre-chamber comprises a plurality of slots and a bottom hole fluidly coupling an interior ...

Method for Operating an Internal Combustion Engine for a Motor Vehicle, and Internal Combustion Engine for a Motor Vehicle

A method for operating an internal combustion engine of a motor vehicle having a cylinder, the combustion chamber of which is delimited in the radial direction by a cylinder wall and in the axial direction by a piston and by a combustion chamber roof. The piston has an annularly peripheral piston stage which is arranged axially recessed in the piston compared with an annularly peripheral piston crown and which merges via an annularly jet splitter contour into a piston hollow arranged axially recessed in the piston in relation to the piston stage. An injector is allocated to the cylinder and via the injector several injection jets are simultaneously injected directly into the combustion chamber in a star shape for a combustion process. 110-. (canceled)1110. A method for operating an internal combustion engine () of a motor vehicle , wherein the internal combustion engine comprises:{'b': 12', '14', '14', '18', '12', '16', '24', '12', '20', '12', '24', '12', '26', '10, 'a cylinder () with a combustion chamber (), wherein the combustion chamber () is delimited in a radial direction () of the cylinder () by a cylinder wall (), in an axial direction () of the cylinder () on a first side by a piston () received translationally moveably in the cylinder (), and in the axial direction () of the cylinder () on a second side by a combustion chamber roof () of the internal combustion engine ();'}{'b': 20', '32', '20', '30', '34', '36', '20', '32, 'wherein the piston () has an annularly peripheral piston stage () which is disposed axially recessed in the piston () compared with an annularly peripheral piston crown () and which merges via an annularly peripheral jet splitter contour () into a piston hollow () disposed axially recessed in the piston () in relation to the piston stage ();'}{'b': 38', '12', '40', '14', '40', '42', '36', '44', '32', '32', '26', '46', '40', '48', '20', '32', '40', '32, 'an injector () allocated to the cylinder (), wherein via the injector first ...

STRUCTURE OF COMBUSTION CHAMBER FOR DIRECT INJECTION ENGINE

A fuel injection valve is shifted, with respect to the bore center of a cylinder, toward one end of an engine's output shaft. A top surface of a piston has inclined surfaces, and is raised by the inclined surfaces. A cavity is formed by hollowing out portions of the inclined surfaces, and faces the injection axis of the fuel injection valve. In a vertical cross section taken along the plane passing through a particular location in an intake other-side region of a combustion chamber and the location of the fuel injection valve, the distance from an injection tip of the fuel injection valve to the wall surface of the cavity at the particular location is longer than that from the injection tip to the wall surface at a diametrically opposed location to the particular location. 1. A structure of a combustion chamber for a direct-injection engine , the structure comprising:a piston inserted into a cylinder and having a cavity formed by recessing a top surface of the piston;a surface of a cylinder head forming a ceiling portion of the combustion chamber and having an intake-side inclined surface and an exhaust-side inclined surface, the ceiling portion being configured to define, along with the cylinder and the piston, a pent-roof-shaped combustion chamber, the intake-side inclined surface being provided with openings of two intake ports arranged side by side along an engine's output shaft, the exhaust-side inclined surface being provided with an opening of an exhaust port; anda fuel injection valve arranged on a ridge line of a pent roof at which the intake-side and exhaust-side inclined surfaces intersect with each other, the pent roof forming the ceiling portion of the cylinder head, the fuel injection valve being shifted, with respect to a bore center of the cylinder, toward one end of the engine's output shaft, the fuel injection valve having an injection axis that extends along an axis of the cylinder, the fuel injection valve being configured to inject fuel through ...

Engine and work machine

An engine includes a cylinder block in which a cylinder is formed, a piston arranged to be reciprocally movable in the cylinder, a cylinder head that is arranged on an upper side of the cylinder block and forms a combustion chamber between an inner peripheral surface of the cylinder and an upper surface of the piston, and an ignition plug arranged in the cylinder head. An inner peripheral portion of the cylinder head includes an inner peripheral side portion formed to be flush with the inner peripheral surface of the cylinder, and a tilting portion tilting from the upper surface of the piston to a side surface is formed on the piston.

CONTROL DEVICE FOR DIRECT INJECTION GASOLINE ENGINE

An engine has an engine body, an injector, and a control section which controls a fuel injection amount and an injection state of the injector. The control section predicts a state of temperature in the combustion chamber, and controls the injector such that a volume of an air-fuel mixture layer formed in the combustion chamber is larger when the predicted temperature is high, than when the predicted temperature is low, even when same fuel amounts are injected. 1. A device for controlling a direct injection gasoline engine , comprising:an engine body which has a piston in a cylinder and of which a combustion chamber is defined by the cylinder and the piston;an injector configured to inject a fuel containing at least gasoline into the combustion chamber through a nozzle hole; anda control section configured to control a fuel injection amount to be injected into the combustion chamber, and an injection state of the injector, according to an operational state of the engine body, whereinthe control section predicts a state of temperature in the combustion chamber, and controls the injection state of the injector such that a volume of an air-fuel mixture layer formed in the combustion chamber is larger when the predicted temperature is high, than when the predicted temperature is low, even when same fuel amounts are injected.2. The device of claim 1 , whereinthe control section controls the injection state of the injector to increase the volume of the air-fuel mixture layer by increasing a width, which extends in a radial direction and intersects with a central axis of the cylinder, of the air-fuel mixture layer formed in the combustion chamber, while keeping a same length of the air-fuel mixture layer along the central axis of the cylinder.3. The device of claim 1 , whereinthe injector has a nozzle body provided with the nozzle hole, and a valve element which opens and closes the nozzle hole, and the injector is configured such that an effective cross-sectional area of ...

INTERNAL COMBUSTION ENGINE

An internal combustion engine where a tumble flow is generated inside a combustion chamber includes: a spark plug; an in-cylinder injection valve that injects fuel at a specific timing so that a fuel spray proceeds towards the vortex center of the tumble flow at the time of stratified charge combustion operation; and a control device that, in a case where the size of a combustion fluctuation during the stratified charge combustion operation is greater than a determination value, changes an in-cylinder injection ratio so that a plug-periphery air-fuel ratio becomes richer. The changing of the ratio is performed by, first, decreasing the ratio by a fixed amount, and when the plug-periphery air-fuel ratio becomes richer as a result thereof, continuing to decrease the ratio, while when the aforementioned result is that the plug-periphery air-fuel ratio becomes leaner, increasing the ratio. 1. An internal combustion engine in which a tumble flow is generated inside a combustion chamber , comprising:a spark plug arranged at a central part of a wall surface of the combustion chamber on a cylinder head side;an in-cylinder injection valve configured to inject fuel at a specific timing so that, when stratified charge combustion operation is performed, a fuel spray proceeds towards a vortex center of the tumble flow; anda control device configured to calculate a size of a combustion fluctuation during stratified charge combustion operation, and in a case where the size of the combustion fluctuation that is calculated is greater than a determination value, change a spray penetration force of fuel injection that is performed at the specific timing so that a plug-periphery air-fuel ratio that is an air-fuel ratio of an air-fuel mixture at a periphery of the spark plug at an spark timing changes to a rich side,wherein the control device is configured to calculate an air-fuel ratio index value that has a correlation with the plug-periphery air-fuel ratio, andwherein changing of the ...

INTERNAL COMBUSTION ENGINE

Stable combustion is achieved in an internal combustion engine, in cases where an air stream has occurred in a cylinder. The engine includes a fuel injection valve having a first nozzle hole and a second nozzle hole, and an spark plug disposed at a position through which the swirling flow flows, and which is at the downstream side of the flow of the swirling flow from an extension line of the first nozzle hole and at the upstream side of the flow of the swirling flow from an extension line of the second nozzle hole, for igniting a spray of fuel injected from the fuel injection valve, wherein the first nozzle hole and the second nozzle hole are formed in such a manner that the shortest distance from the extension line of the first nozzle hole to the spark plug becomes longer than the shortest distance from the extension line of the second nozzle hole to the spark plug. 1. An internal combustion engine in which a swirling flow occurs in a cylinder , said engine comprising:a fuel injection valve that has a plurality of nozzle holes including at least a first nozzle hole and a second nozzle hole for injecting fuel into said cylinder; andan spark plug that is disposed at a position through which said swirling flow flows, and which is at the downstream side of the flow of said swirling flow from an extension line of said first nozzle hole and at the upstream side of the flow of said swirling flow from an extension line of said second nozzle hole, said spark plug to ignite a spray of fuel injected from said fuel injection valve;wherein said first nozzle hole and said second nozzle hole are formed in such a manner that a shortest distance from the extension line of said first nozzle hole to said spark plug becomes longer than a shortest distance from the extension line of said second nozzle hole to said spark plug.2. The internal combustion engine as set forth in claim 1 , whereinsaid first nozzle hole and said second nozzle hole are formed in such a manner that the ...

ENGINE

An engine includes: a piston including a cavity; a cylinder head configured to form a combustion chamber having a pent roof shape; a fuel injection valve configured to inject fuel from a second half of a compression stroke until a first half of an expansion stroke; and a spark plug arranged at a position corresponding to an upper side of the cavity. Injection openings are arranged in a circumferential direction surrounding a longitudinal axis of the valve. The combustion chamber at a compression top dead center is divided into a plurality of fuel injection regions, located in respective injection directions of the injection openings, by vertical surfaces extending radially from the longitudinal axis through a middle between adjacent injection openings. When a volume of the fuel injection region located in the injection direction of the injection opening is large, an opening area of the injection opening is large. 1. An engine configured to inject fuel directly to a combustion chamber in a cylinder in a predetermined operation range in a period from a second half of a compression stroke until a first half of an expansion stroke and perform ignition after a compression top dead center ,the engine comprising:a piston including a cavity that is concave downward at a middle portion of an upper surface of the piston;a cylinder head configured so as to form a combustion chamber having a pent roof shape;a fuel injection valve arranged at the cylinder head so as to be located at a position corresponding to a middle portion of the piston, the fuel injection valve being configured to inject the fuel into the cavity of the piston in the period from the second half of the compression stroke until the first half of the expansion stroke; anda spark plug arranged at the cylinder head so as to be provided at a position located at a radially outer side of the middle portion of the piston and corresponding to an upper side of the cavity of the piston, the middle portion corresponding ...

INTERNAL COMBUSTION ENGINE

With regard to an internal combustion engine having a tumble flow formed in a cylinder, an object of the invention is to intensify the tumble flow. There is provided an internal combustion engine having a pent-roof type combustion chamber. In a predetermined area in the vicinity of an opening of an intake port to a combustion chamber, an upper wall surface of the intake port is extended approximately linearly while being inclined to an intake port-side ceiling surface more downward than a normal direction of the intake port-side ceiling surface in a side view. In a partial area in the predetermined area of the intake port, a distance between lateral wall surfaces on a left side and on a right side of the intake port is gradually increased toward downstream in a top view. 1. An internal combustion engine comprising a pent-roof type combustion chamber in which an intake port-side ceiling surface with an opening of an intake port and an exhaust port-side ceiling surface with an opening of an exhaust port are inclined to a plane that is perpendicular to a center axis of a cylinder , whereina tumble flow is formed in the cylinder to cause a gas to flow in a direction from the exhaust port-side ceiling surface toward a top face of a piston in a neighborhood of a bore wall surface on an exhaust port side and to flow in a direction from the top face of the piston toward the intake port-side ceiling surface in a neighborhood of a bore wall surface on an intake port side, whereinan upper wall surface of the intake port is extended approximately linearly while being inclined to the intake port-side ceiling surface more downward than a normal direction of the intake port-side ceiling surface in a side view, in a predetermined area in vicinity of an opening of the intake port to the combustion chamber, anda distance between lateral wall surfaces on a left side and on a right side of the intake port is gradually increased toward downstream in a top view, in a partial area in the ...

Engine system with rotatable flow guide

An engine system provided. The engine system includes a rotatable flow guide including a flow altering surface positioned upstream of an intake valve having a first side with a curved contour, the flow altering surface generating tumble and swirl flow patterns of intake airflow entering a cylinder through the intake valve in a plurality of active positions. The engine system further includes a flow guide actuator rotating the flow altering surface to alter the tumble and swirl flow patterns of the intake airflow.

INTERNAL COMBUSTION ENGINE

An internal combustion engine includes: a spark plug arranged in the upper wall face of the combustion chamber; an in-cylinder injection valve that, when stratified charge combustion operation is performed, injects fuel into the combustion chamber so that a fuel spray is carried to the periphery of the spark plug by a tumble flow; a piston having, in a crown surface thereof, a concave portion formed so as to extend in an orthogonal direction to the axis line of a piston pin hole, and so that the depth changes in the direction of the axis line; and a bias flow generation apparatus that, in a case where stratified charge combustion operation is performed with an ignition timing retardation, generates a bias in a flow of intake air inside an intake port so that intake air is guided towards the relatively deep part in the direction of the axis line. 1. An internal combustion engine in which a tumble flow is generated inside a combustion chamber , comprising:a spark plug arranged in an upper wall face of the combustion chamber;an in-cylinder injection valve configured, when stratified charge combustion operation is performed, to inject fuel into the combustion chamber so that a fuel spray is carried to a periphery of the spark plug by a tumble flow;a piston having, in a crown surface thereof, a concave portion that is formed so as to extend in an orthogonal direction to an axis line of a piston pin hole and so that a depth of the concave portion changes in a direction of the axis line; anda bias flow generation apparatus configured, in a case where stratified charge combustion operation is performed in a state in which an ignition timing is retarded relative to an optimal ignition timing, to generate a bias in a flow of intake air inside an intake port so that intake air is guided towards a part at which the depth is relatively deep in the direction of the axis line inside the concave portion.2. The internal combustion engine according to claim 1 ,wherein the concave ...

INTERNAL COMBUSTION ENGINE

In an upstream portion from a valve connecting surface that is formed in an opening of an intake port to a combustion chamber, an upper wall surface of the intake port continues from an upstream side end of the valve connecting surface and extends substantially straight and diagonally with respect to a ceiling surface on the intake port side. In addition, a cross-sectional shape of the portion in the intake port in a direction perpendicular to an axial direction of the intake port is a flat shape with an axis in a transverse direction being a long axis. 1. An internal combustion engine comprising:a cylinder;a piston configured to reciprocate in the cylinder;an intake valve configured to introduce or block gas from an intake port of the internal combustion engine into a combustion chamber provided in the cylinder; andan exhaust valve configured to discharge or trap the gas in the combustion chamber from the inside of the combustion chamber to an exhaust port of the internal combustion engine, whereinin the combustion chamber, a ceiling surface on the intake port side, to which the intake port is opened, and a ceiling surface on the exhaust port side, to which the exhaust port is opened, are each inclined with respect to a plane that is perpendicular to a center axis of the cylinder,the internal combustion engine is configured to generate a tumble flow by a flow of the gas in the cylinder in a direction from the ceiling surface on the exhaust port side toward a top surface of the piston near a bore wall surface provided in the cylinder on the exhaust port side and by a flow of the gas in a direction from the top surface of the piston toward the ceiling surface on the intake port side near the bore wall surface on the intake port side,in a specified region that is upstream of a valve connecting surface in the intake port, an upper wall surface of the intake port is inclined downward from a normal line direction of the ceiling surface on the intake port side with ...

INTERNAL COMBUSTION ENGINE

A thermal insulation film is formed on a bottom surface of a cylinder head facing a top surface of a piston. The thermal insulation film in a region (a circumferential region) of a bottom surface of the cylinder head configuring a squish area in a circumferential edge of a cavity region is formed to be thinner than the thermal insulation film in a region (a cavity region) of the bottom surface of the cylinder head facing a cavity. The thermal insulation film in the circumferential region is polished, and surface roughness thereof is equal to or lower than 3 μm. The thermal insulation film in the cavity region is not polished, and surface roughness thereof is 3 to 8 μm on average. 1. An internal combustion engine including a top surface of a piston , on which a cavity is formed , and a bottom surface of a cylinder head that configures a combustion chamber together with the top surface , and has a thermal insulation film , which has a lower thermal conductivity and a lower thermal capacity per unit volume than a base material , formed thereon ,wherein in the bottom surface of the cylinder head which configures the combustion chamber, surface roughness of the thermal insulation film in a circumferential region that configures a squish area in a circumferential edge of a cavity region is formed to be smaller than surface roughness of the thermal insulation film in the cavity region facing the cavity.2. The internal combustion engine according to claim 1 ,wherein a film thickness of the thermal insulation film in the circumferential region is formed to be thinner than a film thickness of the thermal insulation film in the cavity region.3. The internal combustion engine according to claim 1 ,wherein the film thickness of the thermal insulation film in the circumferential region is formed to change continuously in a connection portion with the cavity region, and become thinner with increasing distance from the cavity region.4. The internal combustion engine according to ...

INTERNAL COMBUSTION ENGINE

An object is to enable stable diesel combustion in an internal combustion engine using a fuel having a relatively high self-ignition temperature. In the internal combustion engine, pre-injection and ignition of pre-spray fuel are performed, and thereafter main injection is performed to cause a portion of main-injected fuel to be burned by diffusion combustion. Injection ports of a fuel injection valve are provided in such a way that the quantity of the main injected fuel injected to a predetermined region defined by a predetermined angle equal to or smaller than 90 degrees about the fuel injection valve from the location of an ignition device in the direction of rotation of the swirl is relatively small. 1. An internal combustion engine having a combustion chamber in which a swirl or swirling flow about the center axis of its cylinder is generated , comprising:a fuel injection valve having a plurality of injection ports and injecting fuel in directions from the center axis of the cylinder toward the wall of the cylinder;an ignition plug whose position relative to said fuel injection valve is set in such a way that fuel spray injected through said fuel injection valve passes through an ignition-capable region and the ignition plug can ignite the fuel spray directly;a controller configured to perform pre-injection, which is fuel injection performed through said fuel injection valve during the compression stroke, ignite pre-spray, which is fuel spray formed by the pre-injection, by said ignition plug, and thereafter perform main injection, which is fuel injection through said fuel injection valve performed at such a predetermined injection start time before the top dead center of the compression stroke that enables combustion to be started by flame of pre-injected fuel, thereby causing at least a portion of main-injected fuel to be burned by diffusion combustion,wherein said fuel injection valve has a plurality of injection ports provided in such a way that the ...

INTERNAL COMBUSTION ENGINE

An object of the invention is to provide an internal combustion engine that suppresses a blow-by phenomenon in an overlap period, while allowing for formation of a favorable swirl flow in a combustion chamber. In the internal combustion engine, a housing space is formed in an opening of an exhaust port to the combustion chamber to be more recessed in a cylinder head than an exhaust port-side ceiling surface. A bevel portion of an exhaust valve is placed in the housing space in a valve closed state of the exhaust valve. A valve contact surface is formed on an inner wall surface of the housing space. With regard to an effective passage width of an effective passage that is defined as a linear virtual passage extended from the combustion chamber through the housing space to inside of the exhaust port in a section extended from an intake port side to a bore wall surface side of an exhaust port side, the housing space is formed such that the effective passage width in any location in an intake side space is made smaller than the effective passage width in a corresponding location in an exhaust side space in a slight lifting state of the exhaust valve. 1. An internal combustion engine having a pent roof type combustion chamber configured such that an intake port-side ceiling surface in which an intake port is open in a cylinder head and an exhaust port-side ceiling surface in which an exhaust port is open in the cylinder head are inclined to a plane that is perpendicular to a center axis of a cylinder , whereina housing space is formed in an opening of the exhaust port to the combustion chamber to be more recessed in the cylinder head than the exhaust port-side ceiling surface, wherein a bevel portion of an exhaust valve is placed in the housing space in a valve closed state of the exhaust valve, and a valve contact surface which the bevel portion of the exhaust valve comes in contact with in the valve closed state of the exhaust valve is formed on an inner wall surface ...

INTERNAL COMBUSTION ENGINE

An internal combustion engine where a tumble flow is generated inside a combustion chamber includes: a spark plug; an in-cylinder injection valve that injects fuel at a specific timing so that a fuel spray proceeds towards the vortex center of the tumble flow at the time of stratified charge combustion operation; a variable tumble flow device for making the strength of a tumble flow variable; and a control device configured, when the spray penetration force of fuel injected by the in-cylinder injection valve is increased due to a change over time of the internal combustion engine, to close the variable tumble flow device during the stratified charge combustion operation. 1. An internal combustion engine in which a tumble flow is generated inside a combustion chamber , comprising:a spark plug arranged at a central part of a wall surface of the combustion chamber on a cylinder head side;an in-cylinder injection valve configured to inject fuel at a specific timing so that, when stratified charge combustion operation is performed, a fuel spray proceeds towards a vortex center of the tumble flow;a variable tumble flow device configured to make a strength of a tumble flow variable; anda control device configured, when a spray penetration force of fuel that is injected by the in-cylinder injection valve is increased due to a change over time of the internal combustion engine, to control the variable tumble flow device so as to increase the strength of the tumble flow during the stratified charge combustion operation.2. The internal combustion engine according to claim 1 ,wherein the control device is configured, when the spray penetration force is increased due to the change over time, to increase the strength of the tumble flow with the variable tumble flow device during the stratified charge combustion operation until an air-fuel ratio index value that has a correlation with a plug-periphery air-fuel ratio that is an air-fuel ratio of an air-fuel mixture at a periphery ...

CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

When it is determined that the igniting environment is out of the desired range, the variable valve mechanism is controlled so that the swirl ratio is increased. When the swirl ratio becomes high, the discharge spark and the initial flame move largely in the flow direction of the swirl flow SW and approach the closest fuel spray. Therefore, the discharge spark and the initial flame are attracted to the closest fuel spray and the initial flame enlarges by involving the closest fuel spray (middle stage of FIG. ). Further, the initial flame enlarges further by involving surrounded fuel spray (lower stage of FIG. ). 1. A control device for an internal combustion engine which is configured to control an engine ,wherein the engine comprising:an injector which is provided in an upper portion of a combustion chamber and is configured to inject fuel from multiple injection holes into a cylinder directly;a spark plug which is provided at the upper portion of the combustion chamber and is configured to ignite an air-fuel mixture inside the cylinder by using a discharge spark, the spark plug is also provided on a downstream side relative to the closest fuel spray to the spark plug among the fuel sprays injected from the multiple injection holes, the spark plug is also provided on an upper side of the combustion chamber relative to a contour surface of the closest fuel spray;a first intake valve and a second intake valve, each of which is configured to open and close the combustion chamber;a variable valve mechanism which is configured to increase or decrease lift amount of any one of the first intake valve and the second intake valve; andan exhaust cleaning catalyst which is configured to clean exhaust gas from the combustion chamber,wherein the control device is configured to control the spark plug and the injector as an activation control of the exhaust cleaning catalyst, the spark plug is controlled so as to generate a discharge spark over an ignition period on a retard side ...

COMBUSTION CHAMBER STRUCTURE OF SPARK-IGNITION INTERNAL COMBUSTION ENGINE

A combustion chamber structure includes a squish area located in a first region surrounded by an opening of an intake port and a wall of a cylinder bore in an outer peripheral portion of the combustion chamber. The first region has a first height, and the first height is smaller than the height of any region of the outer peripheral portion of the combustion chamber other than the first region. The combustion chamber structure further includes a reverse squish area located in a second region surrounded by an opening of an exhaust port and the wall of the cylinder bore in the outer peripheral portion of the combustion chamber. The second region has a second height, and the second height is larger than the height of any region of the outer peripheral portion of the combustion chamber other than the second region. 1. A combustion chamber structure for an internal combustion engine , the combustion chamber structure being configured to produce tumble flow as airflow directed from an intake side to an exhaust side , in the vicinity of an upper wall of a combustion chamber , the combustion chamber structure comprising:a squish area located in a first region surrounded by an opening of two intake ports and a wall of a cylinder bore in an outer peripheral portion of the combustion chamber, the first region of the combustion chamber having a first height as measured in an axial direction of a cylinder when a piston of the internal combustion engine is located at a top dead center, the first height being smaller than a height of any region of the outer peripheral portion of the combustion chamber other than the first region;a reverse squish area located in a second region surrounded by an opening of an exhaust port and the wall of the cylinder bore in the outer peripheral portion of the combustion chamber, the second region of the combustion chamber having a second height as measured in the axial direction of the cylinder when the piston is located at the top dead center, the ...

COMBUSTION CHAMBER STRUCTURE OF SPARK-IGNITION INTERNAL COMBUSTION ENGINE

A combustion chamber structure for a spark-ignition internal combustion engine includes a combustion chamber, an ignition plug, and a guide portion. The combustion chamber is configured to produce tumble flow that swirls in an axial direction of a cylinder. The ignition plug is disposed in a central portion of an upper wall of the combustion chamber. The guide portion protrudes from the upper wall of the combustion chamber, and is configured to guide airflow passing through the central portion of the combustion chamber in an intake-exhaust direction of the combustion chamber while dispersing the airflow around the guide portion. 1. A combustion chamber structure for a spark-ignition internal combustion engine , the combustion chamber structure comprising:a combustion chamber configured to produce tumble flow that swirls in an axial direction of a cylinder;an ignition plug disposed in a central portion of an upper wall of the combustion chamber; anda guide portion that protrudes from the upper wall of the combustion chamber so as to surround the ignition plug, the guide portion extending to a larger extent at the intake port side as compared with at the exhaust port side, the guide portion being configured to guide airflow passing through the central portion of the combustion chamber in an intake-exhaust direction of the combustion chamber while dispersing the airflow around the guide portion.2. (canceled)3. The combustion chamber structure according to claim 1 , wherein:the upper wall of the combustion chamber has two intake ports and two exhaust ports; andthe guide portion has an outer periphery that starts at a point between the two intake ports, the outer periphery extends along outer edges of valve seats of the respective intake ports, the outer periphery bends at points between the intake ports and the exhaust ports, to be directed to between the two exhaust ports, and the outer periphery ends at a point between the two exhaust ports. 1. Field of the ...

In-cylinder injection engine

An in-cylinder injection engine includes: a cylinder head that includes a gasket surface stacked on a seating face of a cylinder block and defines a combustion chamber between a piston and a ceiling surface gradually receding from an imaginary plane including the gasket surface in going toward a center of the cylinder head; two intake ports disposed side by side and opened in the ceiling surface of the cylinder head; and a fuel injection valve mounted to the cylinder head and having an injection port facing the combustion chamber at a position between an opening of the intake port and the gasket surface. The intake port is formed to have a shape of introducing an airflow laterally into the combustion chamber along the imaginary plane. Accordingly, the in-cylinder injection engine can reduce attachment of injected fuel to a wall surface of a cylinder bore.

CONTROL METHOD AND CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE

In a control method of an internal combustion engine including a fuel injection valve having a plurality of injection holes and adapted to directly inject a fuel into a cylinder and an ignition plug adapted to generate a plug discharging channel, after fuel injection is performed, spark ignition is performed while turbulence in an air flow is generated by the fuel injection by an ignition plug disposed so that a discharging region is sandwiched by fuel sprays injected from the two adjacent injection holes and located within a range where the turbulence in the air flow is generated. 1. A control method of an internal combustion engine comprising a fuel injection valve having a plurality of injection holes and adapted to directly inject a fuel into a cylinder and an ignition plug adapted to ignite the injected fuel , whereinfuel injection is performed from the fuel injection valve; andspark ignition is performed while turbulence in an air flow is generated by the fuel injection by the ignition plug disposed so that a discharging region is sandwiched by fuel sprays injected from the two adjacent injection holes and having an angle formed by injected two fuel sprays being smaller than an angle formed between each of the two fuel sprays and another adjacent fuel spray and is located within a range where the turbulence in the air flow is generated.2. The control method of an internal combustion engine according to claim 1 , whereinwhen fuel injection is performed during an expansion stroke and combustion is retarded, spark ignition is performed by the ignition plug while turbulence in an air flow is generated by the fuel injection.3. The control method of an internal combustion engine according to claim 1 , whereinwhether combustion is stable or not is determined; andif the combustion is not stable, a fuel injection pressure is raised.4. The control method of an internal combustion engine according to claim 1 , whereintwo fuel sprays sandwiching the discharging region ...

CYLINDER HEAD OF INTERNAL COMBUSTION ENGINE

An internal combustion engine includes a plurality of cylinders, and these cylinders are divided into a first group where the air-fuel mixture is burned in the entire operating region and a second group where the air-fuel mixture is not burned in part of the operating region. The engine comprising: an intake opening opened and closed by an intake valve; an exhaust opening opened and closed by an exhaust valve; and a mask part having a wall surface extending along an outer edge of the intake opening toward the inside of the combustion chamber at an opposite side from the exhaust opening side. The mask part is configured so that a clearance from a passage surface of an edge part of the intake valve to the wall surface of the mask part is smaller at each cylinder of the first group than each cylinder of the second group. 1. An internal combustion engine comprising a plurality of cylinders , these cylinders divided into a first group of cylinders where the air-fuel mixture is burned in the entire operating region where output power is necessary and a second group of cylinders where the air-fuel mixture is not burned in part of the operating region in the operating region where output power is necessary ,the internal combustion engine comprising:an intake opening facing a combustion chamber of each cylinder and opened and closed by an intake valve;an exhaust opening facing a combustion chamber of each cylinder and opened and closed by an exhaust valve; anda mask part having a wall surface extending along an outer periphery of the intake opening toward the inside of the combustion chamber at an opposite side from the exhaust opening side in the direction extending through the center of an entire of the intake opening and the center of an entire of the exhaust opening,wherein the mask part is configured so that a clearance from a passage surface of an edge part of the intake valve to the wall surface of the mask part is smaller at each cylinder of the first group of ...

CYLINDER HEAD FOR AN INTERNAL COMBUSTION ENGINE, INTERNAL COMBUSTION ENGINE, AND METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE

A cylinder head () for an internal combustion engine has a first inlet duct () that is configured to bring about a first tumbling movement and a second inlet duct () that is configured to bring about a second tumbling movement of the air quantities that flow through the cylinder head () and into a cylinder of the internal combustion engine (). An internal combustion engine and a method for operating an internal combustion engine also are provided. 1. A cylinder head for an internal combustion engine that has a crankcase with a cylinder having a piston that moves in the cylinder in an oscillating manner , the cylinder head comprising at least one outlet duct that is selectively openable and closeable and first and second inlet ducts that are selectively openable closeable , the cylinder head , the cylinder and the piston forming a combustion chamber , wherein the first inlet duct is configured to generate a first tumbling movement of an air quantity that flows through the first inlet duct and into the cylinder , and the second inlet duct being configured to generate a second tumbling movement of the air quantity that flows through the second inlet duct and into the cylinder.2. The cylinder head of claim 1 , wherein the first inlet duct is a tangential duct and is configured to bring about a directional change of the air quantity in comparison with the first inlet duct.3. The cylinder head of claim 2 , wherein the second inlet duct has a planar face section to bring about the directional change of the air quantity.4. The cylinder head of claim 1 , wherein the first inlet duct has a first inlet valve with a first lift and the second inlet duct has a second inlet valve.5. The cylinder head of claim 4 , wherein the first lift is greater than the second lift.6. The cylinder head of claim 4 , wherein the first lift is equal to the second lift.7. The cylinder head of claim 4 , wherein the valve lifts are adjustable.8. The cylinder head of claim 1 , further comprising a ...

Method and Apparatus for Producing Stratified Streams

Embodiments of apparatus are disclosed for affecting working fluid flow in a system that delivers material between two locations by carrying the material in the working fluid. For example, embodiments of the disclosed apparatus may be used in an internal combustion engines to carry fuel droplets to a combustion area using air as the working fluid. The apparatus may include a passage including a funnel portion and tumble area that direct working fluid into a stratified stream. The stratified stream may include an outer boundary flow having a toroidal and/or helical flow characteristic and an inner flow carrying injected material that is bound by the outer flow. 127-. (canceled)28. A stratified stream system comprised of:a passage extending from an input port to an exit port, said passage configured to receive a supply of working fluid at the input port;a first portion of said passage configured to induce a Venturi effect and a Coanda effect in the working fluid; anda second portion of said passage between the first portion and the exit port, said second portion configured to complete formation of a stratified stream flow of said working fluid.29. The stratified stream system of claim 28 , wherein the first portion and/or second portion are configured to induce the working fluid to have a poloidal flow characteristic.30. The stratified stream system of claim 28 , wherein the first portion and/or second portion are configured to induce the working fluid to have a helical flow characteristic.31. The stratified stream system of claim 28 , further comprising an injector nozzle or a spark plug ramp or an integrated injector ramp extending into said passage.32. The stratified stream system of claim 28 , wherein the second portion includes a pattern of pockets.33. The stratified stream system of claim 32 , wherein the second portion includes a pattern of fins/grooves.34. The stratified stream system of claim 33 , further comprising an injection ring disposed between the ...

Control system for compression-ignition engine

A compression-ignition engine control system is provided, which includes an intake variable mechanism and a controller. Within a first operating range and a second operating range on a higher engine load side, the controller controls the variable mechanism to form a gas-fuel ratio (G/F) lean environment in which an air-fuel ratio inside a cylinder is near a stoichiometric air-fuel ratio and burnt gas remains inside the cylinder, and controls a spark plug to spark-ignite mixture gas inside the cylinder to combust in a partial compression-ignition combustion. The controller controls the variable mechanism to advance the intake valve open timing on an advancing side of a TDC of the exhaust stroke, as the engine load increases within the first range, and retard the intake valve open timing on the advancing side of the TDC of the exhaust stroke, as the engine load increases within the second range.

Intake port structure for internal combustion engine

In an engine (1), when an intake valve (16) opens, a downstream end portion (61) of a first intake port (6) extends to direct to between a shade back (162a) positioned on a cylinder axis (C) side with respect to a valve stem (161) and a ceiling surface (51) facing the shade back (162a). As viewed in a section perpendicular to a direction perpendicular to an intake air flow direction, a second intake port side inner wall surface (61a) at the downstream end portion (61) of the first intake port (6) curves apart from a second intake port (7) in a direction from an exhaust side to an intake side as compared to the shape of an opposite second intake port side inner wall surface (61b) mirror-reversed to a second intake port (7) side.

Air intake system for IC engines has intake channel with wall to divide it between cylinder head flange and intake opening

The engine has a cylinder head (14) with intake channel (22). The intake channel contains a dividing wall (26) to divide it along a defined section between the cylinder head flange (12) and the intake opening (24). The air duct (20) of the intake pipe (10) contains a flap valve (32), which is mounted so that it projects over the cylinder head flange and engages on the dividing wall in the position, in which it narrows the cross section o the air duct. A shaft (34) for the flap valves of all cylinders is pref. welded into the wall of the intake pipe.

Ignition-assisted fuel combustion system

Conventional direct injection internal combustion engines will not completely ignite and burn relatively lower-cetane-number fuels such as 100 percent methanol or ethanol because the fuel spray injection pattern usually cannot carry or propagate a flame to all the injected fuel which is typically made up of individual fuel streams which are separated by pockets of fuel-deficient intake air. The present fuel combustion system (10) includes a fuel ignition-initiating device (26) such as a glow plug (70) and apparatus (98, 102) for interconnectedly contacting and continuously bridging all of the individual fuel streams (66) with an auxiliary cloud (94) of well-atomized fuel. In this manner, a flame initiated by the fuel ignition-initiating device (26) is rapidly and completely propagated via the auxiliary cloud (94) of fuel to all the individual fuel streams (66).

fuel injection system and process for injection.

提供活塞顶部的结构单元

本发明涉及一种用于内燃发动机的活塞的提供活塞顶部的结构单元。提供活塞顶部的结构单元包括提供活塞顶部的结构单元的顶面和周面的活塞冠部结构，关于活塞的中心轴线，顶面构造成相对于内燃发动机的燃烧室轴向地界定出提供活塞顶部的结构单元且周面构造成径向地界定出提供活塞顶部的结构单元。顶面包括围绕中心轴线延伸的边沿面和在周面内径向地界定出活塞碗的内表面。内表面包括活塞碗的最低位置的区域、沿中心轴线的方向从最低位置的区域的第一边界区段延伸到边沿面的第一侧壁面、从最低位置的区域的第二边界区段凸起而形成不对称的活塞碗底部的偏斜底面、沿中心轴线的方向从所述偏离底面的相应边界区段延伸到所述边沿面的至少一个第二侧壁面。

Apparatus and method for controlling internal combustion engine

(목적) 부분부하에서는 층상연소에 의하여 펌프손실을 없애고 연비를 높여 최대출력시는 예비혼합연소에 의하여 출력을 크게 한다. (Purpose) At partial load, pump loss is eliminated by stratified combustion and fuel efficiency is increased to increase output by premixed combustion at maximum output. (구성) 부분부하시에는 연료분사밸브(13)의 근방에 점화원(14)을 설치하고, 연료를 분사한 후에 혼합기에 점화하여 생긴 불꽃을 연료의 분무로 실린더내에 확산하고, 층상 연소시킨다. 한편, 부하가 커져 층상연소로 매연등이 발생할 경우는 연료분사를 복수회로 하고 전반의 분사로 실린더내에 예비혼합기를 만들고, 이 예비혼합기를 후반의 분사로 만든 불꽃을 기통내에 분사하고, 예비혼합기를 단시간에 연소한다. (Configuration) An ignition source 14 is provided in the vicinity of the fuel injection valve 13 at the partial load, and the spark generated by igniting the mixer after injecting the fuel is diffused into the cylinder by spraying the fuel and stratified. On the other hand, when the load increases and smoke is generated due to laminar combustion, a plurality of fuel injections are performed, a premixer is formed in the cylinder by the first injection, a flame made by the latter injection is injected into the cylinder, and a premixer is used. It burns in a short time. (효과) 본 발명에 의하여 연소시간이 단축하여 노크를 방지할 수 있고, 엔진의 압축비가 높아져 열효율이 상승하여 연비가 높아진다. 층상흡기에 의하여 미연탄화수소의 발생을 방지할 수 있다. 기통연료분사에 의하여 연료의 응답성이 높아져 운전성이 향상한다. (Effect) According to the present invention, the combustion time can be shortened and knocking can be prevented. The compression ratio of the engine is increased, the thermal efficiency is increased, and the fuel efficiency is increased. The layered intake can prevent the generation of unburned hydrocarbons. Cylinder fuel injection improves fuel response and improves operability.

Internal combustion engine

A spark-ignition, air-compressing internal combustion engine has a combustion chamber in a piston movable toward a cylinder head of the engine. Fuel is injected onto the wall of the combustion chamber and air rotated in the chamber to remove the fuel from the combustion chamber wall gradually as a vapor. The cross-section of the combustion chamber wall is defined by two curved lines of specific radial relation generally indicated by the curved line extending from the opening into the combustion chamber having the smaller radius of curvature.

Internal combustion engine

FIELD: engines and pumps. SUBSTANCE: invention relates to ICE, namely to arrangement of ignition source in separate-cycle expansion cylinder. ICE comprises crankshaft 52, cylinder head 70, compression and expansion cylinders 66 and 68, respectively, compression piston 72 and expansion piston 74, bypass channel 78 and ignition source 104.Compression piston 72 reciprocates to intake and compress in revolution of crankshaft 52. Expansion piston 74 reciprocates to expand and discharge in revolution of crankshaft 52. Bypass channel 78 communicates said compression and expansion cylinders. Bypass channel incorporates bypass valve 84 and expansion bypass valve 86 with high-pressure chamber arranged there between. Central section 106 of ignition source 104 is located at a distance from closest peripheral edge 110 of expansion bypass valve passage 98 that equals or exceeds safe distance S. Said safe distance S prevents ingress of burning gas into said passage 98 unless it is shut off for, at least, portion of ICE operating rpm. Said safe distance S is defined by expression: S [mm] = combustion rate [mm/degree of crankshaft turn] x crankshaft turn angle between ignition and expansion bypass valve closure [degrees]. EFFECT: longer life of expansion valve, optimum relation between complete combustion and detonation prevention. 13 cl, 7 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 430 246 (13) C1 (51) МПК F02B 33/02 (2006.01) H01T 13/08 (2006.01) F02B 41/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2010101849/06, 11.06.2008 (24) Дата начала отсчета срока действия патента: 11.06.2008 (72) Автор(ы): ПИРО Жан-пьер (GB), ГИЛБЕРТ Ян П. (GB) R U (73) Патентообладатель(и): СКАДЕРИ ГРУП, ЭлЭлСи (US) Приоритет(ы): (30) Конвенционный приоритет: 07.08.2007 US 60/963,742 (45) Опубликовано: 27.09.2011 Бюл. № 27 2 4 3 0 2 4 6 (56) Список документов, цитированных в отчете о поиске: RU 2066384 C1, ...

Engine with split cycle and method for its operation

FIELD: engines and pumps. SUBSTANCE: internal combustion engine (ICE) with split cycle includes crankshaft (52), compression (66) and expansion (68) cylinders, compression (72) and expansion (74) pistons, and bypass channel (38). Compression piston (72) performs inlet and compression strokes per one turn of crankshaft (52). Expansion piston (74) performs expansion and outlet strokes per one turn of crankshaft (52). Bypass channel (38) connects compression (66) and expansion (68) cylinders. Bypass channel (38) includes bypass compression valves (BCV (84)) and bypass expansion valves (BEV (86)). High pressure cavity is made between bypass valves (84, 86). BCV (84) opens when pressure in compression cylinder (66) is lower than pressure in initial part of bypass valve (78) near bypass compression valve (84). Also, the invention describes operating method of ICE with split cycle, in which BCV opens when pressure in compression cylinder is lower than pressure in initial part of bypass valve, near bypass compression valve. EFFECT: increasing the opening time of valves and reducing the power consumed on delivery in engines with split cycle. 16 cl, 13 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 435 046 (13) C2 (51) МПК F02B 41/00 F02B 33/22 F02B 33/44 (2006.01) (2006.01) (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2010101967/06, 11.06.2008 (24) Дата начала отсчета срока действия патента: 11.06.2008 (73) Патентообладатель(и): СКАДЕРИ ГРУП, ЭлЭлСи (US) R U Приоритет(ы): (30) Конвенционный приоритет: 07.08.2007 US 60/963,742 (72) Автор(ы): ФИЛЛИПС Форд А. (US) (45) Опубликовано: 27.11.2011 Бюл. № 33 2 4 3 5 0 4 6 (56) Список документов, цитированных в отчете о поиске: RU 2263797 С2, 10.11.2005. SU 1413257 A1, 30.07.1988. US 6874454 B2, 05.04.2005. WO 2002025078 A1, 28.03.2002. (85) Дата начала рассмотрения заявки PCT на национальной фазе: 09.03.2010 2 4 3 5 0 4 6 R U (87) Публикация ...

Engine with split cycle with spiral bypass channel

FIELD: engines and pumps. ^ SUBSTANCE: internal combustion engine (ICE) with split cycle includes crankshaft (52), compression (66) and expansion (68) cylinders, compression (72) and expansion (74) pistons, and spiral bypass channel (38). Compression piston (72) performs inlet and compression strokes per one turn of crankshaft (52). Expansion piston (74) performs expansion and outlet strokes per one turn of crankshaft (52). Spiral bypass channel (38) connects compression (66) and expansion (68) cylinders. Spiral bypass channel (38) includes bypass compression and expansion (41) valves, straight-line (39) and end (40) parts. High pressure cavity is made between bypass valves. Expansion bypass valve (41) includes stock (42) and head (43). Straight-line part (39) is located in end section of spiral bypass valve (38). Spiral end part (44) is an integral part of straight-line part (39). Spiral end part (40) is located above bypass expansion valve (41). Spiral end part (40) represents funnel (44). Funnel (44) is twisted about stock (42). Also, the invention deals with ICE containing two tangential spiral bypass channels (78). Channels (78) connect compression (66) and expansion (68) cylinders. Each tangential spiral bypass channel includes bypass valves (84, 86), straight-line tangential part (100) and spiral end part (102). Spiral end parts (102) are twisted in one direction. ^ EFFECT: quick flow of flammable mixture, its quick mixing and distribution prior to the beginning of combustion. ^ 16 cl, 11 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 435 047 (13) C2 (51) МПК F02B F02B F02B F02F 41/00 (2006.01) 33/22 (2006.01) 33/44 (2006.01) 1/42 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2010100790/06, 11.06.2008 (24) Дата начала отсчета срока действия патента: 11.06.2008 (73) Патентообладатель(и): СКАДЕРИ ГРУП, ЭлЭлСи (US) R U Приоритет(ы): (30) Конвенционный приоритет: 07.08.2007 ...

Design of combustion chamber of internal combustion engine with spark ignition

Изобретение относится к двигателям внутреннего сгорания. Конструкция камеры сгорания двигателя внутреннего сгорания с искровым зажиганием включает в себя камеру сгорания, свечу зажигания и направляющую часть. Камера сгорания выполнена с возможностью воспроизводить смешанный поток, который завихряется в осевом направлении цилиндра. Свеча зажигания расположена в центральной части верхней стенки камеры сгорания. Направляющая часть выступает из верхней стенки камеры сгорания и выполнена с возможностью направлять воздушный поток, проходящий через центральную часть камеры сгорания в направлении впуск-выпуск камеры сгорания, обеспечивая разделение воздуха вокруг направляющей части. Изобретение обеспечивает повышение эффективности зажигания и сгорания воздушно-топливной смеси. 1 з.п. ф-лы, 16 ил. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 628 136 C1 (51) МПК F02B 23/10 (2006.01) F02F 1/24 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2016124979, 15.12.2014 (24) Дата начала отсчета срока действия патента: 15.12.2014 (72) Автор(ы): САКАИ Хироюки (JP) (73) Патентообладатель(и): ТОЙОТА ДЗИДОСЯ КАБУСИКИ КАЙСЯ (JP) Дата регистрации: (56) Список документов, цитированных в отчете о поиске: JP2013-113126 A, 25.11.2011. RU Приоритет(ы): (30) Конвенционный приоритет: 2164301 C2, 20.03.2011. SU 989115 A2, 17.01.1983. US 5775288 A, 07.07.1998. 26.12.2013 JP 2013-268772 2 6 2 8 1 3 6 (45) Опубликовано: 15.08.2017 Бюл. № 23 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 26.07.2016 (86) Заявка PCT: IB 2014/002775 (15.12.2014) (87) Публикация заявки PCT: Адрес для переписки: 125009, Москва, а/я 332, ООО "Инэврика" R U (54) КОНСТРУКЦИЯ КАМЕРЫ СГОРАНИЯ ДВИГАТЕЛЯ ВНУТРЕННЕГО СГОРАНИЯ С ИСКРОВЫМ ЗАЖИГАНИЕМ (57) Реферат: Изобретение относится к двигателям камеры сгорания. Направляющая часть внутреннего сгорания. Конструкция камеры выступает из верхней стенки камеры сгорания и сгорания двигателя внутреннего ...

Apparatud and method for fuel injection and ignition of an internal combustion engine

본 발명은 연료 분사 밸브의 분사구가 연소실 내로 개방되고, 분사구 근방에 착화원을 배치하고, 연료 분사 밸브로부터의 연료가 분사된 후에 혼합기에 착화하고, 생성한 화염을 연료의 분류에 실리게 하여 연료의 분류의 에너지를 이용하여 화염의 관통력을 높이고, 화염을 연소실 내로 분산시키게 한 것이다. According to the present invention, an injection port of a fuel injection valve is opened into a combustion chamber, an ignition source is arranged in the vicinity of the injection port, and after fuel is injected from the fuel injection valve, the fuel is ignited in the mixer, and the generated flame is loaded into the classification of fuel. Using the energy of the classification of to increase the penetration force of the flame and to distribute the flame into the combustion chamber.

Air intake device for an internal combustion engine of a vehicle

Luftansaugvorrichtung für eine Brennkraftmaschine eines Fahrzeugs aufweisend: wenigstens einen Zylinderkopf eines Zylinders, wenigstens einen Einlasskanal, welcher mit dem Zylinderkopf verbunden ist, und ein Leitsystem, wobei das Leitsystem ein Trennwandelement aufweist, welches zumindest einen Abschnitt des Einlasskanals Bezogen auf den Zylinderkopf in einen ersten oberen Teilkanal und einen zweiten unteren Teilkanal unterteilt und wobei das Leitsystem ein Klappenelement aufweist zum Öffnen und Schließen des ersten oberen Teilkanals. An air intake device for an internal combustion engine of a vehicle, comprising: at least one cylinder head of a cylinder, at least one intake port connected to the cylinder head, and a guidance system, wherein the guidance system comprises a partition member having at least a portion of the intake port related to the cylinder head in a first upper Partial channel and a second lower sub-channel divided and wherein the control system comprises a flap member for opening and closing the first upper sub-channel.

Engine with split cycle and method for increasing air pressure in it

FIELD: engines and pumps. ^ SUBSTANCE: internal combustion engine (ICE) with split cycle includes crankshaft (52), compression (72) and expansion (74) pistons, compression (66) and expansion (68) cylinders, bypass channel (78, 79) and fuel injector (96). Compression piston (72) performs inlet and compression strokes per one revolution of crankshaft (52). Expansion piston (74) performs expansion and outlet strokes per one revolution of crankshaft (52). Bypass channel (78, 79) that connects compression (66) and expansion (68) cylinders and includes compression (86) and expansion (88) bypass valves with high pressure cavity between it. Fuel injector (96) is installed in pressure cavity of bypass channel (78, 79). Fuel injection with fuel injector (96) to bypass channel is performed fully during compression stroke of compression piston (66). Also, method for increasing air pressure in engine with split cycle is described. It consists in fuel injection with fuel injector (96) to bypass channel fully during compression stroke of compression piston. ^ EFFECT: reducing flammable mixture temperature at inlet and better mixing of air with fuel. ^ 17 cl, 12 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 438 023 (13) C2 (51) МПК F02B F02B F02B F02B 41/00 33/22 33/44 29/00 (2006.01) (2006.01) (2006.01) (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2010101850/06, 11.06.2008 (24) Дата начала отсчета срока действия патента: 11.06.2008 (73) Патентообладатель(и): СКАДЕРИ ГРУП, ЭлЭлСи (US) R U Приоритет(ы): (30) Конвенционный приоритет: 07.08.2007 US 60/963,742 (72) Автор(ы): ФИЛЛИПС Форд А. (US) (45) Опубликовано: 27.12.2011 Бюл. № 36 2 4 3 8 0 2 3 (56) Список документов, цитированных в отчете о поиске: US 6880501 В2, 19.04.2005. US 1305577 А, 05.02.1913. RU 2286470 С2, 27.10.2006. RU 2027879 С1,27.01.1995. RU 2167315 С2, 20.05.2001. US 3896774 А, 29.07.1975. (85) Дата начала рассмотрения заявки PCT на национальной фазе: ...

Direct fuel injection internal combustion engine

A direct fuel injection internal combustion engine comprises a combustion chamber, a fuel injection valve and a spark plug. The combustion chamber has a piston including an outer cavity located in a top surface of the piston and an inner cavity located in the outer cavity. The outer and inner cavities are substantially axially symmetrical about the reciprocation axis of the piston. The fuel injection valve is arranged adjacent the reciprocation axis of the piston to inject a fuel stream directly into the combustion chamber. The spark plug is arranged adjacent the reciprocation axis of the piston to ignite a fuel-air mixture inside the combustion chamber. The direct fuel injection internal combustion engine further comprises a control unit configured to vary at least one of frequency and start timings of the fuel injection valve based on an engine operating condition.

Control Apparatus for an Internal Combustion Engine Capable of Pre-Mixed Charge Compression Ignition

An electric control device 70 is applied to an internal combustion engine 10 capable of a pre-mixed charge compression ignition combustion in which air-fuel mixture gas including air and fuel injected from an injector 37 is formed in a combustion chamber 25 , and the air-fuel mixture gas is self-ignited to be combusted by compressing the air-fuel mixture gas during a compression stroke. The electric control device injects high pressure fluid such as air from the air injection valve 38 into the air-fuel mixture gas at a predetermined acting timing within a compression stroke prior to fuel pyrolysis starting timing to enhance the temperature un-uniformity of the air-fuel mixture gas. This enables the temperature un-uniformity of the air-fuel mixture gas at the fuel pyrolysis starting timing to become larger than the temperature un-uniformity of the air-fuel mixture gas at the fuel pyrolysis starting timing obtained only by simply compressing the air-fuel mixture gas during the compression stroke. As a result, the combustion is moderated and the combustion noise is reduced.

Split-cycle engine with early crossover compression valve opening

스플릿-사이클 엔진은 크랭크샤프트를 포함한다. 압축 피스톤은 압축 실린더 내에 수용되고, 상기 크랭크샤프트에 동작 가능하게 연결된다. 교차 통로는 상기 압축 실린더와 팽창 실린더를 상호 연결시킨다. 상기 교차 통로는 사이에 압력챔버를 정의하는 교차 압축(XovrC) 밸브와 교차 팽창(XovrE) 밸브를 포함한다. 상기 교차 압축 밸브는 상기 압축 실린더 내의 압력이 상기 교차 압축 밸브에서 상기 교차 통로 내의 상류 압력보다 작을 때 상기 교차 압축 밸브가 개방되도록 타이밍되어 있다. The split-cycle engine includes a crankshaft. The compression piston is received in the compression cylinder and operably connected to the crankshaft. The crossover passage interconnects the compression cylinder and the expansion cylinder. The crossover passage includes a crossover compression (XovrC) valve and a crossover expansion (XovrE) valve defining a pressure chamber therebetween. The crossover compression valve is timed to open the crossover compression valve when the pressure in the compression cylinder is less than the upstream pressure in the crossover passage at the crossover compression valve.

Intake system for internal combustion engine

(57)【要約】 本発明は、内燃機関、特に直接噴射装置を有するオットー機関のための吸気システムであって、少なくとも１つのシリンダを制限するシリンダヘッド（１４）と、吸入管（１０）とを有し、この吸入管が、少なくとも１つの空気路（２０）をシリンダ毎に備え、またシリンダ毎に、付設されたシリンダ内へと開口する吸入口（２４）を有する、シリンダヘッド（１４）内に設けられた少なくとも１つの吸入路（２２）を備え、その際吸入管（１０）とシリンダヘッド（１４）とが、シリンダヘッドフランジ（１２）を介して、吸入管（１０）のそれぞれ１つの空気路（２０）が、シリンダヘッド（１４）内の相応の吸入路（２２）と流体伝導的な結合をしているように互いに結合されており、その際吸入管（１０）の空気路（２０）内で、選択的に空気路（２０）の横断面を狭める切替えフラップ（３２）が設けられている吸気システムに関する。この場合、吸入路（２２）内に隔壁（２６）が設けられており、この隔壁が、吸入路（２２）を、シリンダヘッドフランジ（１２）と吸入口（２４）との間の所定の部分にわたって分割し、また、切替えフラップ（３２）が、空気路（２０）の横断面を狭める位置において隔壁（２６）に作用するように形成されており、またシリンダヘッドフランジ（１２）を超えて突出するように設けられている。

Cylinder head for in-cylinder injection spark-ignition type internal combustion engine

一种缸内喷射火花点燃式内燃机的气缸盖形成有一使燃料喷射阀与燃烧室相通的喷射通道，它在燃料喷射阀侧和燃烧室侧分别具有第一和第二通路部分。第一通路部分例如可形成锥台形或直圆柱形，其横截面积朝燃料喷射阀侧方向递减或在整个长度上保持恒定。第二通路部分的横截面积朝燃烧室侧方向递增。喷射阀喷入的燃料通过横截面积渐大的喷射通道进入燃烧室，因而防止因气流突然扩散所造成的燃料喷雾束的紊流，进而提高燃料的燃烧效率。

In-cylinder injection internal combustion engine, control method for internal combustion engine, and fuel injection valve

There is provided a cylinder injection type internal combustion engine capable of performing stratified charge operation at the time of a vehicle speed of 120 km/h and/or an engine rotational speed of 3200 rpm to enhance the fuel efficiency and/or to observe the emission regulations. In the internal combustion engine, a stratum of air and/or air flow is formed between a fuel spray injected from an injection valve and the top face of a piston and/or the wall surface of a combustion chamber, and a face shape contrived to guide the air flow is formed on the top face of the piston. Also, the stratified charge operation can be performed even at the time of cold start or cranking. <IMAGE>

Turbocharged engine

Piston of internal combustion engine

The cylinder head of ignition typed internal engine

본 발명은, 자동차 등에 탑재되는 기통내분사형 불꽃점화식 내연기관용의 실린더헤드에 관하여, 연료분무의 흐트러짐방지 등을 도모하는 기술에 관한 것으로서, 연료분무의 흐트러짐의 방지외에, 실린더헤드의 내압리이크테스트나 연료계의 리이크테스트의 용이화를 도모한 기통내분사형 불꽃점화식내연기관의 실린더헤드를 제공하는 것을 목적으로 한것이며, 그 구성에 있어서, 실린더헤드(2)에는, 연료분사밸브(4)와 연소실(5)을 연통하는 분사통로(60)가 형성되어 있다. 분사통로(60)는, 그 단면적이 연료분사밸브(4)의 분출구(50)쪽으로부터 연소실(5)쪽으로 향해서 증대하도록 형성되고, 또한 연소실(5)쪽의 끝부분이 흡기포트(13)의 연소실(5)에의 개구단부(흡기개구단부)(61)을 따른 형상으로 되어 있다. 또, 분사통로(60)에는, 분출구(50)쪽의 내벽이 절삭가공에 의해 테이퍼형상의 시일시이트면(62)으로 해서 형성되어 있고, 이 부분에 있어서의 단면적의 변화비율(증대비율)이 다른 부위(단면적급증부(63))에 비해서 작게 설정되어 있는 것을 특징으로 한 것이다. BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a technique for preventing the fuel spray from being disturbed in the cylinder head for a cylinder-injection type spark ignition type internal combustion engine mounted on a motor vehicle, and the like. (B) An object of the present invention is to provide a cylinder head of a cylinder-injection type spark ignition type internal combustion engine that facilitates a leak test of a fuel system. In the configuration, the cylinder head (2) includes a fuel injection valve (4). And a spray passage 60 communicating with the combustion chamber 5 is formed. The injection passage 60 is formed such that its cross-sectional area increases from the ejection port 50 side of the fuel injection valve 4 toward the combustion chamber 5, and the end portion of the combustion chamber 5 side of the intake port 13 It has a shape along the opening end (intake opening end) 61 to the combustion chamber 5. Moreover, in the injection passage 60, the inner wall of the jet port 50 side is formed as the taper-shaped seal sheet surface 62 by cutting, and the change ratio (increase ratio) of the cross-sectional area in this part is It is characterized by being set small compared with another site | part (section area increase and increase part 63).

Compression ignition engine controller

Fuel injection valve and internal combustion engine equipped with the same