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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Применить Всего найдено 4456. Отображено 100.
28-10-2021 дата публикации

Дизельный двигатель военной гусеничной машины с устройством регулирования наддува

Номер: RU0000207444U1
Автор: Алексей Леонидович Ахтулов, Алексей Сергеевич Назыров, Артем Юрьевич Евдокимов, Вячеслав Робертович Эдигаров, Вячеслав Степанович Калекин, Исмаил Фарманович Исмаилов, Максим Игоревич Костин, Николай Сергеевич Черепанов, Роман Александрович Юрченко, Сергей Юрьевич Шелпаков
Принадлежит: Алексей Леонидович Ахтулов, Сергей Юрьевич Шелпаков

Полезная модель относится к машиностроению, а именно к двигателестроению, и может быть использована для повышения эффективности работы турбокомпрессора дизельного двигателя военных гусеничных машин.Техническим результатом предложенной полезной модели является повышение приемистости дизельного двигателя с газотурбинным наддувом при сохранении приемлемых показателей габаритной мощности силовой установки.Технический результат предложенной полезной модели достигается тем, что в дизельном двигателе военной гусеничной машины с устройством регулирования наддува, содержащем впускной и выпускной коллекторы, турбину, приводимый ею компрессор, воздушный фильтр, соединенный через воздуховод с компрессором, блок управления перепускными клапанами, согласно полезной модели, на впускном коллекторе установлены два перепускных клапана, один из которых перенаправляет воздух, сжатый компрессором, через трубопровод, соединяющий нагнетательный патрубок компрессора с выпускным коллектором, на вход соплового аппарата турбины, а второй обеспечивает питание двигателя воздухом через трубопровод, соединяющий впускной коллектор с воздушным фильтром, блок управления перепускными клапанами электрически связан с датчиком положения педали акселератора и датчиком частоты вращения коленчатого вала.По сравнению с прототипом, предлагаемое техническое решение позволяет увеличить приемистость дизельного двигателя с газотурбинным наддувом, и, как следствие, улучшить основные показатели по подвижности военной гусеничной машины, при сохранении приемлемых показателей габаритной мощности силовой установки. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 207 444 U1 (51) МПК F02B 37/16 (2006.01) F02D 23/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ (52) СПК F02B 37/16 (2021.08); F02B 23/00 (2021.08) (21)(22) Заявка: 2021121744, 21.07.2021 (24) Дата начала отсчета срока действия патента: Дата регистрации: 28.10.2021 (45) Опубликовано: 28.10.2021 Бюл. № 31 Адрес ...

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Номер записи: 1
16-02-2012 дата публикации

Steel piston with cooling gallery and method of construction thereof

Номер: US20120037112A1
Автор: Florin Muscas
Принадлежит: Individual

A piston and method of construction is provided. The piston includes a top part fixed to a bottom part. The top part has an uppermost surface with annular inner and outer upper joining surfaces depending therefrom. The bottom part has a pair of pin bosses with pin bores aligned with one another along a pin bore axis; a pair of upwardly extending annular inner and outer lower joining surfaces and a combustion bowl wall. Inner and outer weld joints fix the inner and outer upper and lower joining surfaces to one another. An annular cooling gallery is formed laterally between the upper and lower joining surfaces. The inner weld joint joining the top part to the bottom part is located within the combustion bowl wall and configured to minimized the compression height of the piston.

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Номер записи: 2
19-04-2012 дата публикации

Compression ignition engine and method for controlling same

Номер: US20120090572A1
Автор: Jon M. Baxter
Принадлежит: Advanced Diesel Concepts LLC

An engine having improved combustion characteristics is provided. The engine includes a fuel injection system that is variable between two operational states. In the first operating state, the fuel injectors provide a fuel spray having first spray pattern characteristics. When the system detects that an operation characteristic exceeds a threshold, the fuel injectors are displaced into a second operating state. In the second operating state, the fuel injectors provide a spray pattern having first spray pattern characteristics. The combustion cycle may be characterized by timing the fuel injection so that the fuel is sprayed into the cylinder early in the compression stroke. Further still, the combustion cycle may be characterized by controlling the fuel pressure so that the fuel pressure is inversely related to the load on the engine.

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Номер записи: 3
29-11-2012 дата публикации

Combustion system for internal combustion engine

Номер: US20120298071A1
Автор: Munehisa Horibe, Satoru Sasaki, Takamasa Yokota, Yoshiaki Nishijima
Принадлежит: Denso Corp

A combustion system of an internal combustion engine has a fuel injector injecting a fuel directly into a combustion chamber and a water injector injecting a water (non-combustible fluid) into the combustion chamber. The water collides with a fuel spray which the fuel injector injects. A penetrating force of the fuel spray is decreased and the fuel spray hardly reaches a cylinder wall surface. The injected fuel is combusted at a position away from the cylinder wall surface, so that the combustion heat transferred to the cylinder wall surface is reduced and the heat loss of the combustion can be decreased.

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Номер записи: 4
28-02-2013 дата публикации

Piston of engine

Номер: US20130047949A1
Автор: Daichi Okumura, Shinichiro Nogawa
Принадлежит: Toyota Motor Corp

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.

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Номер записи: 5
18-04-2013 дата публикации

Combustion system for an engine having multiple fuel spray induced vortices

Номер: US20130092123A1
Автор: Robert D. Straub
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

An internal combustion engine includes an engine assembly that defines a bore, and a piston disposed and moveable within the bore. The piston and the engine assembly cooperate to define a combustion chamber therebetween. A direct injection fuel system directs a fuel spray into the combustion chamber along a linear path. The combustion chamber includes a contoured surface having a plurality of annular recesses. The contoured surface divides and re-directs the fuel spray from the linear path into each of the annular recesses to form a plurality of independent rotating vortices.

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Номер записи: 6
19-09-2013 дата публикации

Piston Having Combustion Bowl Shaped To Balance Combustion Efficiency And Emission Properties

Номер: US20130239925A1
Автор: JR. James A., Karch Aaron, LANG Daniel, Pierpont David A., Subatch
Принадлежит: CATERPILLAR, INC.

A piston for a compression ignition internal combustion engine includes a piston body having a combustion face defining a combustion bowl, and the combustion face including a compound bowl surface and a compound rim surface. The combustion face is profiled to balance a combustion efficiency property of the piston with emissions properties of the piston. A ratio of a diameter of the combustion bowl to a diameter of the cylinder bowl bore is from 0.68 to 0.74. Other dimensional and proportional features of the piston support low smoke and NOx production during operation. 1. A piston for balancing combustion efficiency with NOx generation and smoke generation in a direct injection compression ignition internal combustion engine having a compression ratio of 15:1 to 16:1 , where the engine has a swirl ratio of 1 or less , a combustion bowl diameter to cylinder bore diameter ratio of 0.68 to 0.74 , and where a fuel injection spray angle is larger than a cone angle defined by a conical projection of the piston within the combustion bowl , the piston comprising:a piston body having an outer cylindrical surface defining a longitudinal piston axis, an axial piston end which includes a combustion face defining a compound combustion bowl, and a compound rim located on the axial piston end and extending radially outwardly from the combustion bowl to the outer cylindrical surface;the compound combustion bowl including a convex inner bowl surface located on the conical projection, and a concave outer bowl surface, and the compound rim including a flat outer rim surface adjoining the outer cylindrical surface and a convex inner rim surface adjoining the compound combustion bowl;wherein the cone angle is equal to about 135° or less, the concave outer bowl surface defines a first radius of curvature which is from 13 mm to 16 mm, and the convex inner bowl surface continuously transitions with the concave outer bowl surface; andwherein the convex inner rim surface abruptly transitions ...

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Номер записи: 7
03-10-2013 дата публикации

SPARK IGNITION TYPE INTERNAL COMBUSTION ENGINE

Номер: US20130255651A1
Автор: HOTTA Yoshihiro, Koike Makoto, Kosaka Hidemasa, NAKAKITA Kiyomi, NOMURA Yoshihiro, WAKISAKA Yoshifumi
Принадлежит: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO

In a spark ignition engine, a thermal insulation thin layer is formed over a wall surface, facing an inside of a combustion chamber, of a base material forming the combustion chamber, and for a thermal conductivity λ [W/(m·K)], a thermal diffusivity κ [mm/s], and a thickness L [μm] of the thermal insulation thin layer, L≧16.7×λ and L≦207.4×(κ)are satisfied. With such a configuration, a heat loss Q_total escaping from gas in a cylinder to the wall of the combustion chamber over all strokes can be reduced, and the thermal efficiency can be improved without inducing degradation of knocking due to an increase in an amount of heating Q_intake of the gas in the cylinder during an intake stroke. 2. A spark ignition engine in which a thermal insulation layer is formed over a wall surface , facing an inside of a combustion chamber , of at least a part of base materials forming the combustion chamber , and mixture gas in the combustion chamber is ignited to burn the mixture gas , whereina thickness of the thermal insulation layer is set within a range of greater than or equal to a lower limit thickness and less than or equal to an upper limit thickness, the lower limit thickness being a thickness where an accumulated amount of heat transferred from gas in a cylinder to the wall of the combustion chamber over all strokes is reduced by 2% compared to a configuration in which there is no thermal insulation layer, and the upper limit thickness being a thickness where an amount of heat transferred from the wall of the combustion chamber to the gas in the cylinder in an intake stroke is increased by 10% compared to a configuration in which there is no thermal insulation layer.4. The spark ignition engine according to claim 2 , whereinthe thickness of the thermal insulation layer is set within a range of greater than or equal to a lower limit thickness and less than or equal to an upper limit thickness, the lower limit thickness being a thickness where the accumulated amount of heat ...

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Номер записи: 8
17-10-2013 дата публикации

Combustion chamber inserts and associated methods of use and manufacture

Номер: US20130269666A1
Автор: Roy Edward McAlister
Принадлежит: McAlister Technologies LLC

Combustion chamber inserts and associated methods of use and manufacture are disclosed herein. In some embodiments, a combustion chamber assembly comprises a cylinder having a cylinder wall at least partially defining a combustion chamber, an intake valve, an exhaust valve, and a piston. The intake valve has an intake valve surface exposed to the combustion chamber, the exhaust valve has an exhaust valve surface exposed to the combustion chamber, and the piston has a piston surface exposed to the combustion chamber. At least one of the cylinder wall, the intake valve surface, the exhaust valve surface, and/or the piston surface includes an insulative portion composed of a synthetic matrix characterization of crystals that is configured to retain heat in the combustion chamber that is generated from a combustion event in the combustion chamber.

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Номер записи: 9
07-11-2013 дата публикации

Internal combustion cyclone engine

Номер: US20130291827A1
Автор: Byung Hahn HAH
Принадлежит: Individual

An internal combustion cyclone engine includes a gas hole, a gas hole plugging protrusion, and oblique holes. The gas hole is provided in the piston, and connects the explosion chamber with the combustion chamber. The gas hole plugging protrusion is provided in the cylinder and configured to be inserted into and seal the gas hole while the piston is pushed up. Oblique holes are provided around the gas hole through the top plate portion of the piston, and each of the oblique holes connects the explosion chamber with the combustion chamber concentrically and obliquely. At the top dead center the top plate portion of the piston almost touches the top wall portion of the cylinder. At the start of the expansion phase before ignition substantially all of the compressed gas is in the explosion chamber and whirls around inside the explosion chamber during the compression phase.

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Номер записи: 10
21-11-2013 дата публикации

Combustion Control via Homogeneous Combustion Radical Ignition (HCRI) or Partial HCRI in Cyclic IC Engines

Номер: US20130306045A1
Автор: David A. Blank
Принадлежит: Individual

A process for enhancement of combustion control in rotary and reciprocating IC engines for improving fuel efficiency by enabling leaner combustion at higher compression ratios. Embodiments supporting this process employ a fluid of higher heat of vaporization and higher volatility but lower ignitability than the fuel to increase the compression ratio required for self ignition. These have secondary chambers in a cylinder periphery for radical ignition (“RI”) species generation in an earlier cycle for use in a later cycle. These chambers communicate with a main chamber via conduits. Measures regulate the RI species generated and provided to the main chamber. These species then alter the dominant chain-initiation reactions of the main combustion ignition mechanism by lowering the heat and the fuel ratios required for combustion. This improves combustion in radical ignition engines and radical augmented spark and compression ignition engines.

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Номер записи: 11
19-12-2013 дата публикации

Ignition Apparatus, Internal-Combustion Engine, Ignition Plug, Plasma Equipment, Exhaust Gas Degradation Apparatus, Ozone Generating/Sterilizing/Disinfecting Apparatus and Odor Eliminating Apparatus

Номер: US20130336849A1
Автор: Yuji Ikeda
Принадлежит: Imagineering Inc

A plasma equipment comprising a microwave oscillator for generating a predetermined microwave band, a microwave resonant cavity for allowing the predetermined microwave band to resonate, and microwave radiation means for radiating the microwave into the microwave resonant cavity, wherein the microwave radiation means is a microwave radiation antenna having the shape and the size so as to form a strong electric field of the microwave in a plasma generation field formed by the microwave.

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Номер записи: 12
30-01-2014 дата публикации

Piston structure for internal combustion engine

Номер: US20140026840A1
Автор: Masakazu Hoshino, Nozomi Okada
Принадлежит: Honda Motor Co Ltd

A piston structure for a four-stroke internal combustion engine is provided, enabling an increase in the intake efficiency and a favorable ignitability to improve the performance of the internal combustion engine. In a piston structure for a four-valve four-stroke internal combustion engine, a piston crown includes: an intake-side inclined flat surface formed in a single plane by bottom surfaces of a pair of intake valve recesses and an intake-side common flat surface; and an exhaust-side inclined flat surface formed in a single plane by bottom surfaces of a pair of exhaust valve recesses and an exhaust-side common flat surface. The intake-side inclined flat surface and the exhaust-side inclined flat surface are formed into a pent-roof shape with a ridge line at an intersection therebetween. The exhaust-side inclined flat surface extends into the intake valve recesses, and the ridge line is located on a side of the intake valve recesses.

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Номер записи: 13
20-02-2014 дата публикации

Internal combustion engine

Номер: US20140048036A1
Автор: Bernd Lamparter, Christian Krauser, Herbert Zoeller, Thomas Koch
Принадлежит: DAIMLER AG

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 ).

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Номер записи: 14
06-03-2014 дата публикации

Two-stage precombustion chamber for large bore gas engines

Номер: US20140060479A1
Автор: David Thomas Lepley, Luigi P. Tozzi, Maria Emmanuella Sotiropoulou
Принадлежит: Prometheus Applied Technologies LLC

In certain embodiments, a two-stage precombustion chamber may be used to reduce engine NOx levels, with fueled precombustion chambers, while maintaining comparable engine power output and thermal efficiency. One or more fuel admission points may be located in either the first prechamber stage or the second prechamber stage. A more efficient overall combustion characterized by low levels of NOx formation may be achieved by a two-stage precombustion chamber system while generating very high energy flame jets emerging from the second prechamber stage into the main combustion chamber. A first prechamber stage may be substantially smaller than a second prechamber stage. The volumes and aspect ratios of the two prechamber stages, along with the location of the electrodes within the first stage prechamber, the holes patterns, angles and the separate fueling, may be selected to create a distribution of fuel concentration that is substantially higher in the first stage prechamber compared to the second prechamber stage.

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Номер записи: 15
20-03-2014 дата публикации

Combustion Bowl Shape Of Direct Injection Diesel Engine For Reducing The Soot Emission

Номер: US20140076273A1
Автор: Chung Min KIM, Dae Sung Han, Doc Koon YOO, Duk Sang KIM, Jin Hwan Yu, Jong Mo AHN, Wook JUNG
Принадлежит: Doosan Infracore Co Ltd

The present disclosure relates to a combustion bowl shape of a direct injection diesel engine for reducing soot. The combustion bowl shape of the direct injection diesel engine for reducing soot according to the present disclosure includes: a lip part protruding from an internal circumferential surface; a main combustion bowl formed at a lower side based on the lip part; and a sub combustion bowl formed at an upper side based on the lip part, in which a diameter ratio of a combustion bowl entrance diameter of the sub combustion bowl to a main combustion bowl maximum diameter of the main combustion bowl is 1.10 to 1.40.

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Номер записи: 16
05-01-2017 дата публикации

Internal combustion engine

Номер: US20170002788A1
Автор: Armin Gallatz, Volker Gallatz
Принадлежит: MWI MICRO WAVE IGNITION AG

An internal combustion engine including at least one cylinder with a piston moveable therein in an engine block in which microwaves are introduced into a combustion chamber through a microwave window, wherein the combustion chamber is formed by a piston base and a cylinder head, characterized in that the combustion chamber includes a combustion chamber wall which functions as a microwave window at least in portions wherein the combustion chamber wall is made from a wall layer that is made from a ceramic material in which wall layer at least one annular circumferential hollow conductor cavity is arranged with at least one inlet opening for the microwave and which includes at least one outlet opening for the microwave that is run in the annular hollow conductor cavity of the wall layer. In general the invention provides safe ignition of lean fuel air mixtures.

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Номер записи: 17
04-01-2018 дата публикации

EXHAUST GAS CONTROL SYSTEM FOR INTERNAL COMBUSTION ENGINE

Номер: US20180003100A1
Автор: ASAURA Shinya, MIYOSHI Yuji, ONO Ryohei, Sato Masaaki
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

An exhaust gas control system includes an upstream purification device disposed in an exhaust passage of the internal combustion engine, a downstream purification device disposed in a portion of the exhaust passage downstream from the upstream purification device, a fuel addition valve disposed in a portion of the exhaust passage upstream from the upstream purification device, and a urea addition valve disposed in a portion of the exhaust passage between the upstream purification device and the downstream purification device, and a cooling device. The cooling device is configured such that refrigerant cools the fuel addition valve first and then cools the urea addition valve subsequent to the fuel addition valve. 1. An exhaust gas control system for an internal combustion engine , the internal combustion engine being a compression ignition-type internal combustion engine operated to perform lean combustion ,the exhaust gas control system comprising:an upstream purification device disposed in an exhaust passage of the internal combustion engine, the upstream purification device including an oxidation catalyst;a downstream purification device disposed in a portion of the exhaust passage downstream from the upstream purification device, the downstream purification device including a selective catalytic reduction catalyst;a fuel addition valve disposed in a portion of the exhaust passage upstream from the upstream purification device, the fuel addition valve being configured to add fuel into exhaust gas of the internal combustion engine;a urea addition valve disposed in a portion of the exhaust passage between the upstream purification device and the downstream purification device, the urea addition valve being configured to add urea aqueous solution into the exhaust gas; anda cooling device having a cooling passage configured to carry refrigerant flowing through the cooling passage, the cooling passage being configured such that the refrigerant cools the fuel addition ...

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Номер записи: 18
02-01-2020 дата публикации

FUEL INJECTION CONTROL SYSTEM AND FUEL INJECTION CONTROL METHOD FOR DIESEL ENGINE

Номер: US20200003147A1
Автор: IWATA Kiyoaki, KIM Sangkyu, MATSUBARA Takeshi, Mori Tunehiro, SHIRAHASHI Naotoshi
Принадлежит:

A fuel injection control device causes an injector to execute main injection or pilot injection toward a joint portion, and low penetration injection to inject fuel at timing earlier than the pilot injection in a PILOT region or at timing later than the main injection in an AFTER region. The fuel injection control device causes the low penetration injection to be executed to inject the fuel only in a radial central region of a combustion chamber. 1. A fuel injection control system for a diesel engine , the fuel injection control system comprising:a combustion chamber of an engine, formed with a lower surface of a cylinder head, a cylinder, and a crown surface of a piston;a fuel injection valve configured to inject fuel into the combustion chamber; anda fuel injection control device including a processor and configured to control an operation of the fuel injection valve; whereinthe crown surface of the piston includes a cavity, a first cavity portion disposed in a radial central region of the crown surface, the first cavity portion including a first bottom having a first depth in a cylinder axial direction;', 'a second cavity portion disposed on an outer peripheral side of the first cavity portion in the crown surface, the second cavity portion including a second bottom having a depth shallower than the first depth in the cylinder axial direction; and', 'a joint portion connecting the first cavity portion and the second cavity portion,, 'the cavity includesthe fuel injection valve is configured to inject the fuel toward the cavity and is disposed at or near a radial center of the combustion chamber,the fuel injection control device is configured to cause the fuel injection valve to execute at least: a main injection to inject the fuel at timing when the piston is positioned near a compression top dead center; a pilot injection to inject the fuel at timing earlier than the main injection; and a low penetration injection to inject the fuel at timing earlier than the ...

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Номер записи: 19
03-01-2019 дата публикации

CONTROLLED AIR ENTRAINMENT PASSAGE FOR DIESEL ENGINES

Номер: US20190003371A1
Автор: Kantrow Daniel William, Kurtz Eric Matthew, Polonowski Christopher, Yi Jianwen James
Принадлежит:

Systems are provided for cooling combustion chamber gasses and increasing an amount of air entrained in an injected fuel spray. In one example, a cooling passage may be included in an internal combustion engine, the cooling passage positioned exterior to a cylinder bore of the engine and coupled to the cylinder bore at a first opening and a second opening. The cooling passage may receive gasses from the cylinder bore via the first opening, and may cool the gasses as they travel through the cooling passage before returning the gasses to the cylinder bore via the second opening. 1. A system , comprisinga cooling passage for an engine positioned exterior to a cylinder bore and coupled to the cylinder bore at a first end, forming a first opening in the cylinder bore for receiving gasses from the cylinder bore, where the cooling passage is further coupled to the cylinder bore at a second end, forming a second opening in the cylinder bore for returning the gasses received from the cylinder bore via the first opening, back to the cylinder bore, wherein the cooling passage comprises a cooled air conduit, a fuel spray conduit, and a central air conduit, the cooled air conduit coupled at a first end to the cylinder bore and at an opposite second end to the fuel spray conduit for directing combustion chamber gasses from the cylinder bore to the fuel spray conduit, and where a first end of the fuel spray conduit is coupled to the cylinder bore and an opposite second end of the fuel spray conduit is positioned in front of a fuel injector such that a fuel spray axis is parallel to a central axis of the fuel spray conduit, for directing one or more of fuel sprays from the fuel injector and gasses from the cooled air conduit into the cylinder bore.2. The system of claim 1 , wherein the cooling passage further comprises a cone-shaped reservoir formed at a top of the mixing passage.3. The system of claim 1 , wherein a tip of the fuel injector extends into the cone-shaped reservoir.4. ...

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Номер записи: 20
03-01-2019 дата публикации

A PISTON CROWN FOR AN INTERNAL COMBUSTION ENGINE

Номер: US20190003372A1
Автор: Eismark Jan
Принадлежит: VOLVO TRUCK CORPORATION

A piston crown is provided for a piston in an internal combustion engine arrangement that includes a cylinder, the piston crown having a piston bowl surface adapted for facing a combustion chamber in the cylinder, wherein the piston bowl surface including a circumferential rim portion, a floor portion connected to and surrounded by the circumferential rim portion, a plurality of circumferentially spaced protrusions in the circumferential rim portion, at least one spray impingement portion, located between two adjacent protrusions. The spray impingement portion includes a reflection surface, being defined by that each possible normal to the reflection surface is directed towards a central axis of the piston, and forming an angle being within a range of a constant angle ±10° with the central axis, wherein the constant angle is at least 50°. 1. An internal combustion engine arrangement comprisingan engine cylinder anda piston positioned for reciprocal movement in the engine cylinder along a central axis between a bottom dead center position and a top dead center position, wherein the piston comprises a piston crown having a piston bowl surface adapted for facing a combustion chamber in the cylinder, wherein the piston crown is arranged in relation to an injector of the combustion engine arrangement, the injector comprising at least one orifice, the orifice being arranged to inject fuel along a fuel spray vector towards the spray impingement portion,wherein the piston bowl surface comprising:a circumferential rim portion,a floor portion connected to and surrounded by the circumferential rim portiona plurality of circumferentially spaced protrusions in the circumferential rim portion,at least one spray impingement portion, located between two adjacent protrusions, wherein the spray impingement portion comprises a reflection surface that substantially has a shape of a portion of an envelope surface of an imaginary cone, being defined by that each possible normal to the ...

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Номер записи: 21
07-01-2016 дата публикации

Electromagnetic wave emission device

Номер: US20160007437A1
Автор: Yuji Ikeda
Принадлежит: Imagineering Inc

The purpose of the present invention is to provide an electromagnetic wave emission device in which the destination to which an electromagnetic wave is supplied can be switched among a plurality of emission antennas, wherein there are no problems such as breakage of a switching element even in a case where a large-power electromagnetic wave is emitted. The present invention is an electromagnetic wave emission device characterized by the following: an electromagnetic wave output from an electromagnetic wave generator is distributed to a plurality of emission antennas, and then from among the plurality of emission antennas, a target antenna having plasma nearby is supplied with an electromagnetic wave distributed to the target antenna and all or part of the electromagnetic waves reflected by the emission antennas other than the target antenna; and the all or part of the electromagnetic waves distributed to the target antenna and all or part of the electromagnetic waves supplied to the target antenna after reflection by the emission antennas other than the target antenna are emitted from the target antenna to the plasma.

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Номер записи: 22
20-01-2022 дата публикации

Multi-position crankshaft lip seal

Номер: US20220018440A1
Автор: John Stephen Roth, Kamala Hasan Pethuraj, Michael Mendoza, Sandeep Namadev Kamble
Принадлежит: Powerhouse Engine Solutions Switzerland IP Holding GmbH

Various systems and methods are provided for utilizing a crankshaft lip seal over the course of a first overhaul life and a second overhaul life. In one example, a method includes installing the crankshaft lip seal between a flywheel housing and a crankshaft of an engine and operating the engine with the crankshaft lip seal. The method further includes removing the crankshaft lip seal, re-machining a floating seal sleeve coupled to the crankshaft or the flywheel housing, and replacing a lip. The crankshaft lip seal is then re-installed between the flywheel housing and the crankshaft and the engine operated with the re-installed crankshaft lip seal.

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Номер записи: 23
11-01-2018 дата публикации

CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

Номер: US20180010538A1
Автор: Suzuki Kotaro, TSUKAMOTO Shota
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

In a catalyst warming-up control, a first time injection is performed by an injector in an intake stroke. A second time injection is performed with an amount smaller than the first time injection in an expansion stroke after a compression top dead center. In the catalyst warming-up control, an interval from the start of the ignition period of an spark plug to the completion of the second time injection is controlled by the ECU so that the initial flame generated from an air-fuel mixture containing the fuel spray injected by the first time injection is brought into contact with the fuel spray injected by the second time injection. 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, andwhen it is determined that a parameter related to combustion fluctuation ...

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Номер записи: 24
09-01-2020 дата публикации

Internal combustion engine

Номер: US20200011237A1
Автор: Akio Kawaguchi, Fumio Shimizu, Hideo Yamashita, Keisuke Tanaka, Naoki Nishikawa, Toshio Horie, Yoshifumi Wakisaka
Принадлежит: Toyota Motor Corp

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.

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Номер записи: 25
09-01-2020 дата публикации

FUEL INJECTION CONTROL SYSTEM AND FUEL INJECTION CONTROL METHOD FOR DIESEL ENGINE

Номер: US20200011263A1
Автор: Kakuda Yoshie, Kataoka Motoshi, KIM Sangkyu, Matsuo Takeru, SHIMO Daisuke, SHIRAHASHI Naotoshi, Yamamoto Takahiro
Принадлежит:

A control system that controls fuel injection of a diesel engine includes a split injection control module that causes a fuel injection valve to execute pre-injection for injecting fuel at a predetermined first timing, and post-injection for injecting fuel at a second timing later than the pre-injection, a setting module that sets a fuel injection amount or a fuel injection timing in the pre-injection or the post-injection so that a difference between a first peak and a second peak, which are peaks of an increase rate of combustion pressure accompanying the pre- and post-injection, falls within a predetermined range, and a calculation module that calculates the first and second peaks in an increase rate of the combustion pressure by excluding motoring pressure, which is an in-cylinder pressure at the time of non-combustion of the combustion chamber. 1. A fuel injection control system for a diesel engine , the fuel injection control system comprising:a fuel injection valve that injects fuel into a combustion chamber; anda fuel injection control device that controls operation of the fuel injection valve, a split injection control module that causes the fuel injection valve to execute pre-injection for injecting fuel at a predetermined first timing, and post-injection for injecting fuel at a second timing later than the pre-injection,', 'a setting module that sets a fuel injection amount or a fuel injection timing in the pre-injection or the post-injection so that a difference between a first peak, which is a peak of an increase rate of combustion pressure in the combustion chamber accompanying the pre-injection, and a second peak, which is a peak of an increase rate of combustion pressure in the combustion chamber accompanying the post-injection, falls within a predetermined range, and', 'a calculation module that calculates the first and second peaks in an increase rate of the combustion pressure by excluding motoring pressure, which is an in-cylinder pressure at a ...

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Номер записи: 26
09-01-2020 дата публикации

FUEL INJECTION CONTROL SYSTEM AND FUEL INJECTION CONTROL METHOD FOR DIESEL ENGINE

Номер: US20200011264A1
Автор: Kakuda Yoshie, KIM Sangkyu, Matsuo Takeru, Nakashima Kengo, Namba Shun, SHIMO Daisuke
Принадлежит:

The control device that controls fuel injection of a diesel engine includes a split injection control module that causes a fuel injection valve to execute pre-injection and post-injection, a setting module that sets a fuel injection amount or a fuel injection timing in the pre-injection so that a target heat release rate characteristic, by which a ratio between a first peak and a second peak, which are peaks of an increase rate of combustion pressure accompanying the pre- and post-injection, becomes a target value set in advance, can be obtained, a prediction module that predicts an occurrence time or a peak value of the first peak based on the injection amount or injection timing and a parameter related to a combustion environmental factor, and a correction module that corrects the fuel injection amount or the fuel injection timing set by the setting module. 1. A fuel injection control system for a diesel engine , the fuel injection control system comprising:a fuel injection valve that injects fuel into a combustion chamber; anda fuel injection control device that controls operation of the fuel injection valve,wherein a split injection control module that causes the fuel injection valve to execute pre-injection for injecting fuel at a predetermined first timing and post-injection for injecting fuel at a second timing that is later than the pre-injection,', 'a setting module that sets a fuel injection amount or a fuel injection timing in the pre-injection so as to obtain a target heat release rate characteristic, by which a ratio of a first peak, which is a rising peak of a heat release rate in the combustion chamber accompanying the pre-injection, and a second peak, which is a rising peak of a heat release rate in the combustion chamber accompanying the post-injection, becomes a target value set in advance,', 'a prediction module that predicts an occurrence time of the first peak or a peak value of the first peak, based on the fuel injection amount or the fuel ...

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Номер записи: 27
09-01-2020 дата публикации

Diesel engine

Номер: US20200011267A1
Автор: Jun Kanzaki, Motoshi Kataoka, Sangkyu Kim, Shinya Iida
Принадлежит: Mazda Motor Corp

The diesel engine is provided with a cylinder, a cylinder head, a fuel injection valve, and a piston. The piston has a cavity, and a notch formed in a circumferential edge of the cavity. The notch includes a first recessed portion which is recessed radially outward from an inner circumferential wall surface of the cavity, and a second recessed portion which is recessed from a crown surface of the piston toward a bottom side of the cavity and continuously extends radially outward from an end, on the crown surface side, of the first recessed portion. A vertical wall, on a downstream side of a swirl flow, of the second recessed portion is formed to extend, in an arched manner, radially inward and toward the downstream side of the swirl flow from a position corresponding to a radially outer side end of the second recessed portion in a plan view.

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Номер записи: 28
03-02-2022 дата публикации

PISTON BOWL GEOMETRIES FOR INTERNAL COMBUSTION ENGINES

Номер: US20220034279A1
Автор: Ahuja Nitisha, Dahodwala Mufaddel Z., FRANKE Michael, Joshi Satyum, Koehler Erik
Принадлежит: FEV GmbH

A piston for an internal combustion engine is provided. The piston includes a piston bowl defined by a floor surface and a rim wall extending from an outer periphery of the floor surface in a system vertical direction to circumferential surround the floor surface. The piston bowl includes a center portion that extends above the floor surface. A plurality of protrusions extend radially from the center portion and from the floor surface and are spaced apart such that a spray guide is formed between each of the spaced apart plurality of protrusions. Each of the plurality of protrusions and spray guides are tapered so to terminate prior to the rim wall such that a continuous radius portion is formed from a portion of the rim wall and a portion of the floor surface beyond a respective terminating portion of each of the plurality of protrusions and spray guides. 1. A piston for an internal combustion engine , the piston comprising: a center portion that extends above the floor surface in the system vertical direction,', 'a plurality of protrusions extending radially from the center portion and from the floor surface, each of the plurality of protrusions having a starting portion, a terminating portion and an upper surface, the upper surface of the plurality of protrusions continuously tapers in the system vertical direction between the starting portion and the terminating portion, each of the plurality of protrusions are spaced apart such that a spray guide is formed between each of the spaced apart plurality of protrusions, each of the plurality of protrusions and spray guides are tapered so to terminate prior to the rim wall such that a continuous radius portion is formed from a portion of the rim wall and a portion of the floor surface beyond a respective terminating portion of each of the plurality of protrusions and the spray guides,', 'wherein each of the plurality of protrusions and the spray guides direct a fuel into the continuous radius portion., 'a piston bowl ...

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Номер записи: 29
18-01-2018 дата публикации

Direct-injection, applied-ignition internal combustion engine with injection device arranged in the cylinder liner, and method for operating an internal combustion engine of said type

Номер: US20180017013A1
Автор: Albert Breuer, Helmut Hans Ruhland, Maziar Khosravi, Thomas Lorenz
Принадлежит: FORD GLOBAL TECHNOLOGIES LLC

A method for operating a fuel injection system is provided. The method includes injecting fuel from a first direct fuel injection device arranged in a cylinder liner in a cylinder block into a combustion chamber and injecting fuel from a second direct fuel injection device arranged in a cylinder head into the combustion chamber, the first and second direct fuel injection devices arranged at an obtuse angle with regard to an intersection of central axes of the first and second direct fuel injection devices.

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Номер записи: 30
17-04-2014 дата публикации

ENGINE COMBUSTION CONTROL VIA FUEL REACTIVITY STRATIFICATION

Номер: US20140102406A1
Автор: Hanson Reed M., Kokjohn Sage L., Reitz Rolf Deneys, Splitter Derek A.
Принадлежит: WISCONSIN ALUMNI RESEARCH FOUNDATION

A compression ignition engine uses two or more fuel charges having two or more reactivities to control the timing and duration of combustion. In a preferred implementation, a lower-reactivity fuel charge is injected or otherwise introduced into the combustion chamber, preferably sufficiently early that it becomes at least substantially homogeneously dispersed within the chamber before a subsequent injection is made. One or more subsequent injections of higher-reactivity fuel charges are then made, and these preferably distribute the higher-reactivity matter within the lower-reactivity chamber space such that combustion begins in the higher-reactivity regions, and with the lower-reactivity regions following thereafter. By appropriately choosing the reactivities of the charges, their relative amounts, and their timing, combustion can be tailored to achieve optimal power output (and thus fuel efficiency), at controlled temperatures (and thus controlled NOx), and with controlled equivalence ratios (and thus controlled soot). 1. A compression ignition combustion method for an internal combustion engine wherein:a. the engine has a combustion chamber containing an at least substantially homogeneous mixture of fuel and air distributed throughout the combustion chamber; (1) supplying a fuel charge into the combustion chamber, wherein the reactivity of the fuel charge differs from the reactivity of the fuel within the fuel and air mixture; and', i. before the fuel charge significantly disperses within the combustion chamber, whereby the combustion chamber has a stratified distribution of fuel reactivity such that the fuel charge defines a volume within the combustion chamber having different reactivity than the remainder of the combustion chamber,', 'ii. until ignition occurs within the combustion chamber,, '(2) compressing the fuel and air mixture, 'thereby causing combustion of the fuel charge and the fuel and air mixture., 'b. the method includes the steps of2. The method ...

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Номер записи: 31
17-01-2019 дата публикации

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

Номер: US20190017477A1
Автор: Hou Deyang
Принадлежит: QuantLogic Corporation

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.

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Номер записи: 32
22-01-2015 дата публикации

Combustion bowl of piston

Номер: US20150020765A1
Автор: David A. Pierpont, John P. Timmons, Michael B. Goetzke, Raghavendra Subramanya, Reddy POCHA SIVA SANKARA
Принадлежит: Electro Motive Diesel Inc

A piston for a compression ignition internal combustion engine includes a piston body having an outer cylindrical surface defined along a longitudinal piston axis. A piston includes a combustion face defining a combustion bowl including an inner bowl surface, an inner rim portion and an outer rim portion. The combustion face includes a cross-sectional profile of rotation about the longitudinal piston axis. A first profile of the profile of rotation includes a convex curve segment, a linear segment outboard the convex curve segments and a first set of concave curve segments outboard the linear segment. The first set of concave curve segments defines a first radius of curvature. A second profile is provided outboard the first profile and includes a second set of concave curve segments. The second set of concave curve segments defines a second radius of curvature greater than the first radius of curvature.

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Номер записи: 33
16-01-2020 дата публикации

Two-Cycle Diesel Engine Configured for Operation with High Temperature Combustion Chamber Surfaces

Номер: US20200018220A1
Автор: Doers Douglas A., Greco Robert A., Olesen Paul, Webb Dennis Raymond
Принадлежит:

A 2-cycle, direct-injection diesel engine configured to accommodate low cetane diesel and jet fuels. The engine includes combustion chambers having surfaces which are operable at high temperatures during engine operation to increase the combustion rate of low cetane fuels. The engine is further configured to reduce starting times in cold and/or low pressure situations such as those experienced during attempts to restart a plane engine at relatively high altitudes. 1. An engine , comprising: a cylinder comprising an intake port proximate to a first side of the cylinder and an exhaust port proximate to a second side of the cylinder opposite the first side; and', 'a first fluid flow channel located adjacent at least one of the intake port and the exhaust port to cool the cylinder of the engine block;, 'an aluminum engine block, comprisinga composite sleeve located within the cylinder;a head assembly comprising a second fluid flow channel to cool the head assembly engaged with the engine block; a fuel flow channel between a fuel source and an injector tip;', 'a return fuel channel between the injector tip and the fuel source; and', 'a cooling fuel channel between the injector tip and the fuel source;, 'a fuel injector assembly coupled to the head assembly, the injector assembly comprisinga fire plate fixed between the sleeve and the head assembly; anda piston having a crown and located within the sleeve and configured to oscillate within the sleeve.2. The engine of claim 1 , wherein the first fluid flow channel includes a first branch passing over the exhaust port and a second branch passing under the exhaust port.3. The engine of claim 1 , wherein the composite sleeve is a metal composite.4. The engine of claim 3 , wherein the metal composite is a metal matrix aluminum alloy coated with steel.5. The engine of claim 4 , wherein the aluminum alloy comprises an Al—Si alloy claim 4 , an SiC particulate claim 4 , and a Ni coated graphite that are solution and precipitation ...

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Номер записи: 34
25-01-2018 дата публикации

PISTON

Номер: US20180023454A1
Автор: Chang David Yu-Zhang, Gong Weidong
Принадлежит: CATERPILLAR INC.

A piston for an engine is provided. The piston includes a body having a crown disposed about a central axis. The crown includes an inner circumference and an outer circumference. The piston includes a central chamber transversely disposed within the body and recessed with respect to the crown. The piston includes a central mound disposed within the central chamber about the central axis. The piston also includes a bowl extending from the central mound towards the crown. The piston further includes a passageway provided on the inner circumference of the crown. The passageway includes a slot defined by a first surface inclined at a first angle with respect to the central axis. The slot is adapted to allow flow of a fuel from the central chamber towards the outer circumference of the crown. 1. A piston for an engine , the piston comprising:a body having a crown disposed about a central axis, the crown having an inner circumference and an outer circumference;a central chamber transversely disposed within the body and recessed with respect to the crown;a central mound disposed within the central chamber about the central axis;a bowl extending from the central mound towards the crown; anda passageway provided on the inner circumference of the crown, the passageway including a slot defined by a first surface inclined at a first angle with respect to the central axis, wherein the slot is adapted to allow flow of a fuel from the central chamber towards the outer circumference of the crown.2. The piston of further including a plurality of the slots provided in a spaced apart arrangement from each other along the inner circumference of the crown.3. The piston of claim 1 , wherein the passageway further includes a second surface and a third surface such that the slot defined by the first surface claim 1 , the second surface claim 1 , and the third surface has a triangular configuration.4. The piston of claim 1 , wherein the first angle is between 30° and 60°.5. The piston of ...

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Номер записи: 35
24-01-2019 дата публикации

DIESEL ENGINE WITH DUAL FUEL INJECTION

Номер: US20190024572A1
Автор: Kurtz Eric Matthew
Принадлежит:

Methods and systems for supplying fuel to a diesel engine during a cycle of a cylinder are described. In one example, a cylinder is supplied fuel via two fuel injectors having different fuel flow rates. The two fuel injectors may be arranged opposed to each other or in a way that fuel spray from one injector intersects and collides with fuel spray from the other injector. 1. An engine system , comprising:an engine including at least one cylinder;a first diesel fuel injector supplying fuel to the at least one cylinder; anda second diesel fuel injector supplying fuel to the at least one cylinder, the second diesel fuel injector a higher fuel flow rate injector than the first diesel fuel injector.2. The engine system of claim 1 , where the first diesel fuel injector and the second diesel fuel injector inject diesel fuel directly into the at least one cylinder.3. The engine system of claim 2 , further comprising positioning the first diesel fuel injector and the second diesel fuel injector in the engine such that fuel exiting the first diesel fuel injector collides with fuel exiting the second diesel fuel injector without fuel from the first diesel fuel injector and fuel from the second diesel fuel injector colliding with a surface of the engine.4. The engine system of claim 2 , further comprising a piston in the at least one cylinder claim 2 , the piston including a first cavity and a second cavity.5. The engine system of claim 4 , where the first cavity is positioned in a top of the piston to receive fuel directly from a spray cone of fuel injected via the first diesel fuel injector.6. The engine system of claim 5 , where the second cavity is positioned in a top of the piston to receive fuel directly from a spray cone of fuel injected via the second diesel fuel injector claim 5 , and where the second cavity has a larger volume than the first cavity.7. The engine system of claim 1 , where the first diesel fuel injector and the second diesel fuel injector are coupled to ...

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Номер записи: 36
24-01-2019 дата публикации

DIESEL ENGINE DUAL FUEL INJECTION STRATEGY

Номер: US20190024604A1
Автор: Kurtz Eric Matthew, Styles Daniel Joseph
Принадлежит:

Methods and systems for supplying fuel to a diesel engine during a cycle of a cylinder are described. In one example, a cylinder is supplied fuel via two fuel injectors having different fuel flow rates. The two fuel injectors may be operated to provide pilot, main, and post combustion fuel injections during a cycle of a cylinder. 1. A diesel fuel injection method , comprising:during a cycle of a cylinder, injecting diesel fuel to the cylinder via a low fuel flow rate diesel fuel injector and injecting diesel fuel to the cylinder via a high fuel flow rate diesel fuel injector via a controller, the low fuel flow rate diesel fuel injector and the high fuel flow rate diesel fuel injector positioned in the cylinder.2. The diesel fuel injection method of claim 1 , where the low fuel flow rate diesel fuel injector provides pilot fuel injections during the cycle of the cylinder.3. The diesel fuel injection method of claim 2 , where the high fuel flow rate diesel fuel injector provides a main fuel injection during the cycle of the cylinder.4. The diesel fuel injection method of claim 3 , further comprising providing post combustion fuel injections via the low flow rate diesel fuel injector during the cycle of the cylinder.5. The diesel fuel injection method of claim 4 , where the cylinder is included in a four stroke engine.6. The diesel fuel injection method of claim 4 , where the cylinder is included in a two stroke opposed piston engine.7. The diesel fuel injection method of claim 1 , where injecting diesel fuel to the cylinder via a low fuel flow rate diesel fuel injector and injecting diesel fuel to the cylinder via a high fuel flow rate diesel fuel injector includes injecting a main fuel pulse via the low fuel flow rate diesel fuel injector and injecting a main fuel pulse via the high fuel flow rate diesel fuel injector.8. A diesel fuel injection method claim 1 , comprising:during a cycle of a cylinder, alternating pilot fuel injections between a first diesel fuel ...

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Номер записи: 37
29-01-2015 дата публикации

Auxiliary chamber gas supplying device for gas engine

Номер: US20150028239A1
Автор: Hiroshi Yoshizumi, Kiyoshi Terakado, Yuta Furukawa
Принадлежит: Mitsubishi Heavy Industries Ltd

In an auxiliary chamber gas supplying device for a gas engine including an auxiliary chamber gas supply path through which fuel gas is supplied to an auxiliary chamber, the auxiliary chamber gas supply path is connected to a fuel gas supply source through a solenoid valve, and when the solenoid valve is opened, the fuel gas, in an amount corresponding to an opened period of the solenoid valve, is supplied from the fuel gas supply source to the auxiliary chamber through the auxiliary chamber gas supply path, and the opened period of the solenoid valve is set in such a manner that a predetermined amount of fuel gas is supplied to the auxiliary chamber, and a restriction unit that extends the opened period of the solenoid valve is formed in the auxiliary chamber gas supply path.

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Номер записи: 38
23-01-2020 дата публикации

TWIN OUTLET CHECK LIQUID FUEL INJECTOR FOR DUAL FUEL SYSTEM

Номер: US20200025154A1
Автор: Anders Jonathan, Campion Robert M., Chittenden Jonathan Richard, Diers Dean Craig, John Bobby, Mahmood Sana
Принадлежит: CATERPILLAR INC.

A liquid fuel injector such as for a dual fuel system in an internal combustion engine includes two-way injection control valves for controlling twin outlet checks. A first set of orifices are arranged in an A-F-Z pattern, and a second set of orifices are arranged in an A-F-Z pattern, within the fuel injector, among a high-pressure inlet passage, a low-pressure space, and first and second outlet check control chambers, respectively. A common nozzle supply cavity is fluidly connected to the high-pressure inlet passage and supplies each of two sets of nozzle outlets opened and closed by the twin outlet checks. 1. A liquid fuel injector for an internal combustion engine comprising:an injector body defining a high pressure inlet passage, a first set of nozzle outlets, a second set of nozzle outlets, a first control chamber and a second control chamber each in fluid communication with the high pressure inlet passage, and a low pressure space;a first outlet check having a closing hydraulic surface exposed to a fluid pressure of the first control chamber and movable between a closed position blocking the first set of nozzle outlets, and an open position;a second outlet check having a closing hydraulic surface exposed to a fluid pressure of the second control chamber and movable between a closed position blocking the second set of nozzle outlets, and an open position;a first two-way injection control valve positioned fluidly between the first control chamber and the low pressure space;a second two-way injection control valve positioned fluidly between the second control chamber and the low pressure space;the injector body further defining a first set of orifices arranged in an A-F-Z pattern among the high pressure inlet passage, the low pressure space, and the first control chamber, and a second set of orifices arranged in an A-F-Z pattern among the high pressure inlet passage, the low pressure space, and the second control chamber; andthe injector body further defining a ...

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Номер записи: 39
28-01-2021 дата публикации

FUEL INJECTION CONTROL DEVICE FOR ENGINE

Номер: US20210025318A1
Автор: Nishida Tomohiro, Ohura Takuya
Принадлежит:

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- ...

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Номер записи: 40
05-02-2015 дата публикации

INTERNAL COMBUSTION ENGINE FITTED WITH COMBUSTION PRESSURE DETECTION DEVICE

Номер: US20150034039A1
Автор: Misaizu Tsuyoshi, Soga Yoshihiko, TAKAHASHI Kazuo
Принадлежит:

An internal combustion engine fitted with a combustion pressure detection device includes: an internal combustion engine having a combustion chamber, a pressure detection device having a housing, a diaphragm, and a detection member, and having a shoulder part. The diaphragm is provided on the front end side of the housing and the detection member arranged inside the housing and behind the diaphragm, allowing it to detect the pressure working via the diaphragm. Also provided is a second seal member in a ring shape that seals the opening in the combustion chamber and the housing in the shoulder part of the housing in the pressure detection device. 18-. (canceled)9. An internal combustion engine fitted with a combustion pressure detection device , comprising:an internal combustion engine including a combustion chamber and an opening formed on a wall surface constituting the combustion chamber, the opening connecting to the combustion chamber and having a wider diameter on a near side than on a far side thereof;a combustion pressure detection device including: a housing having a cylindrical shape that is insertable into the opening of the internal combustion engine, the housing being narrower on a front end side thereof in an insertion direction in accordance with the diameter of the opening on the far side, and being wider on a rear end side thereof in accordance with the diameter of the opening on the near side, and the housing having a shoulder part between the front end side and the rear end side thereof; a diaphragm provided on the front end side of the housing in the insertion direction; and a detection member arranged inside the housing and behind the diaphragm, and detecting the pressure working via the diaphragm; anda seal member in a ring shape that has a cross section in an opening shape, the seal member sealing the opening in the combustion chamber and the housing at the shoulder part of the housing in the combustion pressure detection device, whereinthe ...

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Номер записи: 41
31-01-2019 дата публикации

Piston Bowl for an Internal Combustion Engine

Номер: US20190032545A1
Автор: Parsi Mohammad
Принадлежит: Perkins Engines Company Limited

A piston crown for a piston of an internal combustion engine, the piston crown extending in an axial direction along a central axis and in a radial direction outwardly from the central axis. The piston crown comprises an annular surface at a first end of the piston crown in the axial direction; and a piston bowl located radially within the annular surface and recessed relative to the first end of the piston crown. The piston bowl comprises a raised floor in a radially central region of the piston bowl; an arcuate surface located radially outward relative to the raised floor; and a lip chamfer surface extending radially outwardly from the arcuate surface and radially inwardly from the annular surface. A radially inmost portion of the lip chamfer surface is radially inside the radially outermost portion of the arcuate surface. A bowl maximum radius, R, is defined as a distance in the radial direction between the central axis of the piston crown and an innermost edge of the annular surface. A bowl height, H, is defined as a distance in the axial direction between the annular surface and a surface of the piston bowl furthest from the annular surface. A lip re-entrancy angle is defined as an acute angle between a line extending in the radial direction at the first end of the piston crown and a tangent to the arcuate surface closest to the first end of the piston crown. The bowl maximum radius, R, is between 2.3 and 3.2 times the bowl height, H, and the lip re-entrancy angle is between 40° and 80°. 1. A piston crown for a piston of an internal combustion engine , the piston crown extending in an axial direction along a central axis and in a radial direction outwardly from the central axis , the piston crown comprising: an annular surface at a first end of the piston crown in the axial direction; and a piston bowl located radially within the annular surface and recessed relative to the first end of the piston crown; wherein the piston bowl comprises: an arcuate surface ...

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Номер записи: 42
30-01-2020 дата публикации

Methods and Devices For Controlling The Compression Ratio of an Opposed Piston Engine

Номер: US20200032680A1
Автор: JAMES WARREN, Steven Niswander, William Vincent Meyers, Jr.
Принадлежит: WARREN ENGINE Co

A valve with an opening is driven by an electric motor to rotate around the cylinder of an opposed piston engine such that the opening separately matches an intake and exhaust opening on the cylinder to allow fuel to enter the combustion chamber of the engine and allow exhaust to be expelled. The intake and exhaust cylinder openings may be separated from each other by approximately sixty degrees of the outside of the cylinder.

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Номер записи: 43
08-02-2018 дата публикации

Two-stage precombustion chamber for large bore gas engines

Номер: US20180038270A1
Автор: David Thomas Lepley, Luigi P. Tozzi, Maria-Emmanuella Sotiropoulou
Принадлежит: Prometheus Applied Technologies LLC

In certain embodiments, a two-stage precombustion chamber may be used to reduce engine NOx levels, with fueled precombustion chambers, while maintaining comparable engine power output and thermal efficiency. One or more fuel admission points may be located in either the first prechamber stage or the second prechamber stage. A more efficient overall combustion characterized by low levels of NOx formation may be achieved by a two-stage precombustion chamber system while generating very high energy flame jets emerging from the second prechamber stage into the main combustion chamber. A first prechamber stage may be substantially smaller than a second prechamber stage. The volumes and aspect ratios of the two prechamber stages, along with the location of the electrodes within the first stage prechamber, the hole patterns, angles and the separate fueling, may be selected to create a distribution of fuel concentration that is substantially higher in the first stage prechamber compared to the second prechamber stage.

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Номер записи: 44
07-02-2019 дата публикации

VARIABLE-COMPRESSION RATIO INTERNAL-COMBUSTION ENGINE WITH TWO MIXING ZONES, NOTABLY FOR A MOTOR VEHICLE, AND METHOD OF INJECTION FOR SUCH A VEHICULE

Номер: US20190040789A1
Автор: CHEVILLARD Stephane, DE PAOLA Gaetano, DEGEILH Philippe, Zaccardi Jean-Marc
Принадлежит:

A variable-compression ratio direct-injection internal-combustion engine comprising at least a cylinder (), a cylinder head () carrying a fuel injection means () spraying fuel in a single sheet () of fuel jets (), a piston () sliding in this cylinder, and a combustion chamber () delimited on one side by upper face () of the piston comprising a projection () rising up towards the cylinder head and arranged in the cent of a concave bowl (). According to the invention, the combustion chamber comprises at least two mixing zones (Z, Z) into which fuel jets () are injected, one (Z) of the zones being used for a maximum compression ratio (Tmax) and the other (Z) zone being used for a minimum compression ratio (Tmini). 19.-. (canceled)10. A variable-compression ratio direct-injection internal-combustion engine comprising at least one cylinder with each cylinder having a cylinder head carrying fuel injection spraying fuel in a sheet of fuel jets , a piston sliding in cylinder , and a combustion chamber delimited on one side by upper face of the piston comprising a projection rising upward towards the cylinder head and located in the center of a concave bowl , the combustion chamber comprising at least two mixing zones into which the fuel jets are injected , which one of the zones being used for obtaining a maximum compression ratio and another of zones being used for a minimum compression ratio.11. An internal-combustion engine as claimed in claim 10 , wherein the zones are associated together for achieving a minimum compression ratio.12. An internal-combustion engine as claimed in claim 10 , wherein mixing zones are axially arranged one above the other.13. An internal-combustion engine as claimed in claim 11 , wherein mixing zones are axially arranged one above the other.14. An internal-combustion engine as claimed in claim 12 , wherein the mixing zones are delimited from each other by a projection.15. An internal-combustion engine as claimed in claim 13 , wherein the ...

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Номер записи: 45
18-02-2021 дата публикации

ENHANCED PISTON FOR IMPROVING THE EFFICIENCY OF AN INTERNAL COMBUSTION ENGINE

Номер: US20210047982A1
Автор: ENGELMANN Mark
Принадлежит:

An enhanced piston for improving the efficiency of an internal combustion engine has a cylinder with a combustion chamber and a lower cylinder portion. A cylinder head is disposed on the cylinder. An enhanced piston is moveably disposed within the cylinder and is connected to a piston rod. The enhanced piston has a piston cavity. There is an upper piston valve connected to an upper piston valve rod. The upper piston valve is disposed within the piston cavity wherein the upper piston valve selectively seals said piston cavity from the combustion chamber. A piston cavity port is disposed on a bottom portion of the piston cavity and is selectively opened and closed with a lower piston valve. The lower piston valve seals the piston cavity port from the lower cylinder portion. This way the gases are selectively sealed in the piston cavity under pressure until released in the combustion chamber. 1. An enhanced piston for improving the efficiency of an internal combustion engine comprising:a cylinder;said cylinder having a combustion chamber and a lower cylinder portion;a cylinder head disposed on said cylinder;an enhanced piston moveably disposed within said cylinder;a piston rod connected to said enhanced piston;said enhanced piston having a piston cavity;an upper piston valve connected to an upper piston valve rod;said upper piston valve disposed within said piston cavity; wherein said upper piston valve selectively seals said piston cavity from said combustion chamber;a piston cavity port disposed on a bottom portion of said piston cavity;a lower piston valve; andsaid lower piston valve disposed within said piston cavity port; wherein said lower piston valve seals said piston cavity port from said lower cylinder portion; wherein gases selectively sealed in said piston cavity are contained under pressure until released in said combustion chamber.2. The enhanced piston for improving the efficiency of an internal combustion engine according to wherein said lower piston ...

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Номер записи: 46
03-03-2022 дата публикации

ENGINE WITH COMBUSTION CHAMBER

Номер: US20220065158A1
Автор: Harada Yuji, Hori Junki, KOGA Yoshiyuki, Koshiro Yudai, Kuramochi Akira, Nagasawa Takeshi, Seto Masatoshi, Yamashita Hiroyuki
Принадлежит:

An engine is provided, which includes a combustion chamber defined by a cylinder head and a piston inside a cylinder of a cylinder block, a fuel injection nozzle provided to the cylinder head and formed in a tip-end part with a plurality of injection holes from which fuel is injected into the combustion chamber, the tip-end part being exposed to the combustion chamber, and a passage-forming member formed with a passage through which the injected fuel passes. The injection holes include first and second injection holes, and the passage-forming member is disposed around the tip-end part of the nozzle so as to cause a difference between a speed at which fuel injected from the first injection hole flows toward a circumferential part of the combustion chamber, and a speed at which fuel injected from the second injection hole flows toward the circumferential part.

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Номер записи: 47
26-02-2015 дата публикации

Diesel combustion system

Номер: US20150053172A1
Автор: Jiangping Tian, Kai Sheng, Kunpeng Qi, Ping Yi, Qiang Zhang, Wuqiang Long, YAO Fu, Yicong WANG
Принадлежит: Dalian University of Technology

A diesel combustion system including an injector and a combustion chamber. The combustion chamber is formed by a cylinder head, a cylinder liner, and a piston. The combustion chamber includes an upper layer and a lower layer. The diameter D1 of the upper layer is larger than the diameter D2 of the lower layer. A junction of the upper layer and the lower layer is provided with an impinging block for rebounding the diesel fuel spray. The impinging block includes an impinging surface, an upper guide surface, and a lower guide surface. When in use, part of the diesel fuel spray is rebounded by the impinging surface, and part of the diesel fuel spray is diffused along the upper guide surface and the lower guide surface of the impinging block to achieve double-layered split flow of the diesel fuel.

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Номер записи: 48
14-02-2019 дата публикации

PISTON BOWL RIM WITH FATIGUE RESISTANCE

Номер: US20190048822A1
Автор: GERMANO Francesco
Принадлежит:

A piston with an improved bowl geometry includes a piston body having a generally planar crown and a skirt extending from the crown. An oval or multi-lobed bowl rim of a combustion bowl that is recessed in the crown so that the sides of the bowl rim are provided with increased material to resist fatigue along the pin plane, optionally along the thrust/antithrust plane and generally optionally along other planes between the pin plane and the thrust/antithrust plane. 1. A piston for an engine , comprising:a piston body having a generally planar crown and a skirt extending from the crown; andan combustion bowl recessed in the crown and having an oval-shaped bowl rim, wherein the combustion bowl defines an undercut.2. The piston according to claim 1 , further comprising an oil gallery disposed in the piston that at least partially follows a contour of the combustion bowl.3. The piston according to claim 2 , wherein the oil gallery has an upper section that follows the contour of the oval shaped combustion bowl rim and a bottom section that follows a circular contour.4. The piston according to claim 1 , wherein a bottom of the combustion bowl has a mounded center region.5. The piston according to claim 1 , wherein the oval-shaped bowl rim has a longer first dimension along a major axis that is perpendicular to a piston pin axis and a relatively shorter second minor axis that is parallel to the piston pin axis so that the crown has increased material on opposite sides of the oval-shaped bowl rim in a direction parallel to the piston pin plane.6. A piston for an engine claim 1 , comprising:a piston body having a generally planar crown and a skirt extending from the crown; anda combustion bowl recessed in the crown and has a bowl rim maximum diameter region and a minimum diameter region that is smaller than the maximum diameter region, the minimum diameter region being along an axis that is parallel to a piston pin axis wherein the crown has increased material on opposite ...

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Номер записи: 49
25-02-2016 дата публикации

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

Номер: US20160053714A1
Автор: Mark C. Sellnau
Принадлежит: Delphi Technologies Inc

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.

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Номер записи: 50
23-02-2017 дата публикации

DIRECT-INJECTION INTERNAL-COMBUSTION ENGINE WITH DUAL SHEET ANGLE FOR PRODUCING A FUEL MIXTURE IN A COMBUSTION CHAMBER WITH DUAL COMBUSTION ZONE AND LOW COMPRESSION RATIO, AND METHOD FOR USING SAME

Номер: US20170051657A1
Автор: LAGET Olivier, MARTINEZ Lionel, RICHARD Stephane
Принадлежит:

The present invention relates to a compression-ignition direct-injection internal-combustion engine with a compression ratio ranging between 13.5 and 16.5 including a combustion chamber limited on one side by upper face () of a piston () comprising a projection () arranged in the center of a concave bowl () with at least two mixing zones (Z Z), a fuel injection comprising at least one injector () projecting fuel in at least two fuel jet sheets () with different sheet angles (A A). The fuel injector comprises two rows of injection orifices () arranged one above the other with the number of orifices of each row (Ninf, Nsup) is greater than or equal to −4.Ns+14 and less than or equal to −4.Ns+16 for the lower sheet or −4.Ns+18 for the upper sheet. Ns is the swirl number of this engine with a swirl number less than 1.5. 16-. (canceled)7. A compression-ignition direct-injection internal-combustion engine comprising at least a cylinder , a cylinder head carrying fuel injection , a piston sliding in each of the at least one cylinder , a combustion chamber delimited on one side by an upper face of the piston comprising a projection extending in a direction of the cylinder head and arranged in a center of a concave bowl with at least two mixing zones , the fuel injection comprising at least one injector projecting fuel in at least two fuel jet sheets having different sheet angles , with a lower sheet of jet axis for zone and an upper sheet of jet axis for zone; and wherein the fuel injection comprises at least two rows of injection orifices arranged one above the other and a number of orifices of each row (Ninf , Nsup) is greater than or equal to −4.Ns+14 and less than or equal to −4.Ns+16 for the lower row or −4.Ns+18 for the upper row , where Ns is a swirl number of the engine.8. An engine as claimed in claim 7 , wherein a minimum compression ratio is 13.5 and a maximum compression ratio is 16.5.9. An engine as claimed in claim 7 , wherein the swirl number is less than 1.5 ...

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Номер записи: 51
05-03-2015 дата публикации

Long Power Stroke Engine

Номер: US20150059695A1
Автор: Wildensteiner Otto M.
Принадлежит:

Means and method of substantially increasing the efficiency of a spark ignition Otto cycle engine. This is done by increasing the stroke length of the pistons and reducing the amount of air (or fuel/air mixture) by means other than the throttle plate taken in on the intake stroke. The amount of air or fuel/air mixture taken in is that which creates the same conditions in the combustion chamber at the conclusion of the compression stroke as exist in prior art engines used for the same application. The advantage arises from the increase in the length of the power stroke; this extracts more energy from the combustion gases before they are removed on the exhaust stroke and it also increases the torque of the engine as it is well known that torque is a function of stroke length. Extracting more energy from the combustion gases also reduces the amount of heat transferred to the engine block, thereby reducing the load on the cooling system. 1. An Otto cycle internal combustion engine having a cylinder , intake means for directing air or fuel/air mixture into said cylinder , said means for directing air or fuel/air mixture into said cylinder having a throttle plate therein , an intake valve which opens to allow air or fuel/air mixture into said cylinder on the intake stroke and closes at the end of said intake stroke , a camshaft having a lobe thereon which operates said intake valve , a piston in said cylinder , and a combustion chamber at the top of said cylinder wherein the compression ratio is considerably greater than 13.5:1 but conditions inside the combustion chamber at the conclusion of the compression stroke are approximately the same as those in an engine whose compression ratio is in the range of approximately 6:1 to 13.5:1.2. An internal combustion engine as in having means in addition to said throttle plate for regulating the flow of air into said cylinder.3. An internal combustion engine as in wherein said means in addition to said throttle plate comprises an ...

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Номер записи: 52
01-03-2018 дата публикации

Method for producing heat-shielding film

Номер: US20180057639A1
Автор: Hideo Yamashita
Принадлежит: Toyota Motor Corp

A pore sealing treatment is performed in order to enhance the heat-shielding property of an anode oxide film by blocking at least the openings of open pores. In the first step of the pore sealing treatment, a solvent-typed pore sealing agent (first pore sealing agent) is used, and a first silicon-based oxide film is formed. In the second step of the pore sealing treatment, a non-solvent-typed pore sealing agent (second pore sealing agent) is used, and a second silicon-based oxide film is formed. In contrast to the first pore sealing agent, the second pore sealing agent is substantially free from the volume contraction in the application step or in the firing step. Consequently, even when the incompletely blocked openings remain after the first step, these incompletely blocked openings can be certainly blocked by the second silicon-based oxide film.

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Номер записи: 53
01-03-2018 дата публикации

SKEWED COMBUSTION CHAMBER FOR OPPOSED-PISTON ENGINES

Номер: US20180058315A1
Автор: VENUGOPAL Rishikesh
Принадлежит: Achates Power, Inc.

A combustion chamber for an opposed-piston engine has a rotationally skewed shape in a longitudinal section that is orthogonal to a chamber centerline, between diametrically-opposed openings of the combustion chamber through which fuel is injected. The rotationally skewed shape interacts with swirl to generate a tumble bulk charge air motion structure that increases turbulence. 1. A method for operating a two-stroke cycle , compression ignition , opposed-piston engine including at least one cylinder with a bore and a sidewall , piston-controlled exhaust and intake ports near respective ends of the cylinder , a pair of fuel injectors that are mounted in the sidewall , and a pair of pistons disposed in opposition in the bore , by:introducing swirling charge air into the cylinder between end surfaces of the pistons, in which the end surfaces have flat aspects without outwardly-extending ridges;moving the pistons toward each other in a compression stroke; and,forming a combustion chamber between the end surfaces of the pistons,the combustion chamber having a centerline and further comprising:a rotationally skewed shape in a first longitudinal section of the combustion chamber that is symmetrical with respect to the combustion chamber centerline; and,an elongated shape in a second longitudinal section of the combustion chamber that is orthogonal to the first longitudinal section with opposite end portions that taper along the combustion chamber centerline toward the fuel injectors; and,the method further comprising the fuel injectors injecting opposing fuel sprays into swirling charge air in the combustion chamber.2. The method of claim 1 , wherein injecting opposing fuel sprays includes injecting opposing fuel sprays in which each fuel spray has three plumes or injecting opposing fuel sprays in which each spray has four plumes.3. The method of claim 1 , wherein injecting opposing fuel sprays includes injecting opposing fuel sprays in which each fuel spray has a ...

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Номер записи: 54
28-02-2019 дата публикации

Fuel Injector Bore Repair

Номер: US20190061072A1
Автор: Brockman Robert Louis, Cavanaugh Daniel Thomas, Graham Curtis John, Sharp Robert E.
Принадлежит: CATERPILLAR INC.

A method for remanufacturing or repairing a cylinder head having a bore configured to receive a fuel injector comprises machining a portion of a surface forming the bore to remove imperfections, inserting a repair component into the bore proximate the machined portion of the bore, and spraying material into the bore proximate the machined portion and the repair component, thereby holding the component into place. 1. A cylinder head configured to receive a fuel injector comprising:a body defining a bore having a longitudinal axis and configured to receive a fuel injector;the body also defining a large diameter portion of the bore, a small diameter portion of the bore and an intermediate diameter portion of the bore disposed axially between the large diameter portion of the bore and the small diameter portion of the bore, the body further defining a machined chamfered portion extending axially from the large diameter portion of the bore to the intermediate diameter portion of the bore; andwherein the body further defines a machined step disposed axially between the large diameter portion of the bore and the machined chamfered portion of the bore.2. The cylinder head of claim 1 , wherein the machined step and machined chamfered portion includes surfaces having a surface roughness with a Ra value of 3.2 microns or greater.3. The cylinder head of claim 1 , further comprising a repair sleeve inserted into the intermediate diameter portion claim 1 , wherein the repair sleeve includes an annular cylindrical shape defining a cylindrical axis claim 1 , a first end disposed along the cylindrical axis having a chamfered portion and a second end disposed along the cylindrical axis.4. The cylinder head of claim 3 , wherein the repair sleeve is inserted into the intermediate diameter portion of the bore with a slight interference fit.5. The cylinder head of claim 3 , wherein the second end of the repair sleeve also has a chamfered portion.6. The cylinder head of claim 5 , further ...

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Номер записи: 55
12-03-2015 дата публикации

Piston of an internal combustion engine

Номер: US20150068487A1
Автор: Gustav Schaller, Manfred Rapp, Robert Bowing, Steffen Gruber
Принадлежит: Caterpillar Energy Solutions GmbH

A piston of an internal combustion engine is disclosed. The piston may have a piston sleeve with a centre axis and a piston base with a diameter D delimiting the piston sleeve at a top of the piston sleeve. The piston base may have a piston base rim of width b and a piston bowl with a depth t. The piston bowl may be designed as a pot bowl, which may have a piston bowl base and a piston bowl wall with a maximum diameter d4 adjoining the piston bowl base. The piston bowl may have an opening cross-section aligned symmetrically relative to the centre axis. The opening cross-section may have a minimum diameter da, which is smaller than the diameter d4. A flow cut-off edge designed as a nose may be formed in the opening cross-section and may project in the radial direction inwards over the piston bowl wall.

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Номер записи: 56
28-02-2019 дата публикации

Control device for engine

Номер: US20190063344A1
Автор: Gyetae PAK, Keiji Maruyama, Kota Matsumoto, Masanari Sueoka, Tomonori Urushihara, Toru Miyamoto, Yudai Koshiro
Принадлежит: Mazda Motor Corp

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.

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Номер записи: 57
28-02-2019 дата публикации

Control system for compression-ignition engine

Номер: US20190063350A1
Автор: Atsushi Inoue, Keiji Maruyama, Kota Matsumoto, Masanari Sueoka
Принадлежит: Mazda Motor Corp

A control system for a compression-ignition engine is provided, which includes an engine configured to combust a mixture gas inside a combustion chamber by compression ignition, a fuel injector attached to the engine, a state function adjusting part attached to the engine and configured to adjust at least introduction of fresh air into the combustion chamber, a three-way catalyst provided in an exhaust passage of the engine, a wall temperature acquiring part configured to acquire a parameter related to a temperature of a wall of the combustion chamber, and a controller. A swirl flow is generated inside the combustion chamber to circle along the wall. When the wall temperature of the combustion chamber is below a given wall temperature, the controller sets an air-fuel ratio of the mixture gas substantially to a stoichiometric air-fuel ratio so as to remain within a purification window of the three-way catalyst.

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Номер записи: 58
28-02-2019 дата публикации

CONTROL SYSTEM FOR PRE-MIXTURE COMPRESSION-IGNITION ENGINE

Номер: US20190063361A1
Автор: MIYAMOTO Toru, MORIMOTO Hiroki, Noomo Akira, YAMAGUCHI Naohiro
Принадлежит:

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, ...

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Номер записи: 59
10-03-2016 дата публикации

Fuel injector with diesel pilot injection

Номер: US20160069310A1
Автор: James H. Yager
Принадлежит: AVL Powertrain Engineering Inc

A fuel injector is provided and includes an injector body having a first longitudinally extending chamber. The injector body has a first intake port, a second intake port, and at least one fuel injection port. The first intake port provides a first fluid to the first longitudinally extending chamber, the second intake port provides a second fluid to the first longitudinally extending chamber, and the at least one fuel injection port discharges the first and second fluids from the first longitudinally extending chamber.

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Номер записи: 60
27-02-2020 дата публикации

FUEL SYSTEM FOR REDUCING FUEL TARGETING ERRORS AND ENGINE OPERATING METHOD

Номер: US20200063701A1
Автор: ANDERS Jonathan W., Campion Robert, John Bobby
Принадлежит: CATERPILLAR INC.

Operating an engine includes injecting a first charge of liquid fuel using a first set of nozzle outlets in a fuel injector, and injecting a second charge of liquid fuel using a second set of nozzle outlets in a fuel injector. The first charge is autoignited in a first engine cycle, and the second charge is autoignited in a second engine cycle, and may be used to pilot ignite a charge of gaseous fuel. Operating the engine further includes limiting errors in targeting of the second charge of liquid fuel caused by transitioning the engine from a first combination to a second combination of speed, load, and boost, by varying an injection pressure of the liquid fuel from the first engine cycle to the second engine cycle. 1. A method of operating an engine comprising:injecting a first charge of liquid fuel into a cylinder in the engine using a first set of nozzle outlets in a fuel injector, such that spray jets of the first charge of liquid fuel have orientations that are based at least in part on a first spray angle of the first set of nozzle outlets;autoigniting the first charge of liquid fuel in a first engine cycle;injecting a second charge of liquid fuel into the cylinder using a second set of nozzle outlets in the fuel injector, such that spray jets of the second charge of liquid fuel have orientations that are based on a second spray angle of the second set of nozzle outlets that is different from the first spray angle;autoigniting the second charge of liquid fuel in a second engine cycle;transitioning the engine from a first speed, load, and boost combination in the first engine cycle to a second speed, load, and boost combination in the second engine cycle; andlimiting errors in targeting of the second charge of liquid fuel that are caused by the transitioning of the engine at least in part by varying an injection pressure of the liquid fuel from the first engine cycle to the second engine cycle.2. The method of further comprising supplying the first charge of ...

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Номер записи: 61
09-03-2017 дата публикации

INTERNAL COMBUSTION ENGINE

Номер: US20170067390A1
Автор: MIYAMOTO Yosuke, MIYARA Naoyuki, Nagasaki Taketo, Takagawa Hajime, Yamamoto Yasuhiro
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

An intake port of an internal combustion engine is connected to a combustion chamber and includes a connecting portion having a passage cross-sectional area that increases as the connecting portion approaches the combustion chamber, and an upstream portion connected to an upstream end of the connecting portion. The connecting portion is provided at its downstream end with a valve seat with which an umbrella part of an intake valve is brought into contact. At least one recess extending in an extending direction of the intake port and included in the connecting portion and the upstream portion is provided at least at one of two portions, the two portions located on both sides in an extending direction of an output shaft, of a peripheral surface of the intake port. 3. The internal combustion engine according to claim 1 , whereinthe intake port has two of the recesses, one of the two recesses provided at each of the two portions located on both sides in the extending direction of the output shaft. The disclosure of Japanese Patent Application No. 2015-176934 filed on Sep. 8, 2015 including the specification, drawings and abstract is incorporated herein by reference in its entirety.1. Technical FieldThe disclosure relates to an internal combustion engine that introduces intake air into a combustion chamber through an intake port, thereby generating a tumble flow in the combustion chamber.2. Description of Related ArtJapanese Patent Application Publication No. 2008-255860 (JP 2008-255860 A) discloses an internal combustion engine that generates a tumble flow in a combustion chamber. That is, as shown in , the intake air introduced into a combustion chamber through an intake port flows in a counterclockwise direction in the figure, thereby generating a tumble flow in the combustion chamber . A cylinder head of this internal combustion engine is provided with a tubular valve guide by which a stem of an intake valve is slidably supported. One end in a longitudinal direction ...

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Номер записи: 62
09-03-2017 дата публикации

COMBUSTION CHAMBER FOR AN INTERNAL COMBUSTION ENGINE AND AN INTERNAL COMBUSTION ENGINE

Номер: US20170067391A1
Автор: Brandt Richard S.
Принадлежит: VOLVO TRUCK CORPORATION

An engine includes a combustion chamber including a cylinder wall defining a cylinder, a fuel injector disposed in a first opening in the cylinder wall and a piston head disposed in the cylinder. A piston bowl at least partially defined by a wall having a generally spiral shape is provided in a top of the piston head. 1. A combustion chamber for an internal combustion engine , comprising:a cylinder wall defining a cylinder;a fuel injector disposed in a first opening in the cylinder wall;a piston had disposed in the cylinder, a piston bowl at least partially defined by a wall having a generally spiral shape being provided in a top of the piston head.2. The combustion chamber for an internal combustion engine as set forth in claim 1 , wherein a depth of the spiral shaped wall increases toward a center portion of the piston bowl.3. The combustion chamber for an internal combustion engine as set forth in claim 2 , wherein the piston bowl is further defined by a ramp defined on one edge by the spiral shaped wall and on another edge by the center portion of the piston bowl.4. The combustion chamber for an internal combustion engine as set forth in claim 3 , wherein the fuel injector is oriented relative to piston bowl so that a central axis of an injected fuel jet is generally perpendicular to a central axis of the piston.5. The combustion chamber for an internal combustion engine as set forth in claim 1 , wherein a center portion of the piston bowl is substantially circular in shape.6. The combustion chamber for an internal combustion engine as set forth in claim 5 , wherein the spiral shaped wall increases in depth from the outer end of the spiral shaped wall toward an inner end of the spiral shaped wall at the center portion.7. The combustion chamber for an internal combustion engine as set forth in claim 5 , wherein the center portion of the piston bowl is substantially flat.8. The combustion chamber for an internal combustion engine as set forth in claim 5 , wherein ...

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Номер записи: 63
11-03-2021 дата публикации

DIESEL ENGINE SYSTEM

Номер: US20210071616A1
Автор: Fujioka Tetsuya, INAZUMI Takeshi, MATSUBARA Takeshi, SHIRAHASHI Naotoshi
Принадлежит:

A diesel engine system is provided, which includes a piston having a cavity dented downwardly in a crown surface thereof and having a bottom part, a peripheral part dented so as to be convex radially outward, and a lip part formed above the peripheral part and protruding so as to be convex radially inward in a cross-sectional view. An injection controller causes an injector to perform, during operation in a given operating range, a main injection in which injected fuel is directed to the lip part, and an after-injection in which a smaller amount of the fuel than the main injection is injected at a given timing later than the main injection in an expansion stroke. An injection interval period from an end of the main injection to a start of the after-injection is shorter as a temperature parameter related to a progress of a warmup of engine increases. 1. A diesel engine system , comprising:a cylinder;a piston reciprocatably accommodated in the cylinder;an injector configured to inject fuel containing diesel fuel into a combustion chamber that is a space above the piston;a temperature sensor configured to detect a given temperature parameter that becomes higher as a warmup of a diesel engine progresses; andan injection controller configured to control the injector so that fuel is injected at a plurality of timings set from a compression stroke to an expansion stroke during operation of the engine system in a given operating range, a bottom part formed so that a height thereof becomes lower while extending radially outward,', 'a curved peripheral part formed radially outward of the bottom part and dented so as to be convex radially outward in a cross-sectional view including a cylinder axis, and', 'a curved lip part formed above the peripheral part and protruding so as to be convex radially inward in the cross-sectional view,, 'wherein the piston has a cavity dented downwardly in a crown surface thereof, the cavity having, as wall surfaces defining the cavity,'}wherein ...

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Номер записи: 64
15-03-2018 дата публикации

Internal combustion engines

Номер: US20180073424A1
Автор: Christian Edward BUCKSEY, Huw David Powell
Принадлежит: Amaroq Ltd

Disclosed is a piston ported two-stroke compression ignition internal combustion engine comprising: a cylinder having a fixed closed end, and a piston for reciprocation within the cylinder, wherein the closed end of the cylinder and the piston together define a combustion chamber therebetween; at least one heater to heat the combustion chamber; and a controller to control the heater to heat the combustion chamber when the controller determines that a temperature of the combustion chamber has fallen below a threshold temperature during reciprocation of the piston within the cylinder.

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Номер записи: 65
05-03-2020 дата публикации

Combustion system and method of using fuel composition as fuel for remolded diesel engine

Номер: US20200072120A1
Автор: Masahiro TACHI, Shigemi Sawada
Принадлежит: Chang Hua-Shu

A combustion system includes a remodeled diesel engine and a fuel composition to be added into the remodeled diesel engine. The remodeled diesel engine includes a cylinder unit, and a coating coated on the cylinder unit and containing a catalyst that is a metal, an alloy of the metal, a composite containing oxides of the metal, a salt of the metal or combinations thereof. The metal is platinum, nickel, cobalt, copper, molybdenum, and/or titanium. The fuel composition includes water, a fuel oil and an emulsifying agent. The amount of water ranges from 10 to 90 wt % based on total weight of water and the fuel oil, and the amount of the emulsifying agent ranges from 0.5 to 10 wt % relative to total weight of water and the fuel oil.

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Номер записи: 66
14-03-2019 дата публикации

SYSTEMS AND METHODS OF COMPRESSION IGNITION ENGINES

Номер: US20190078499A1
Автор: Riley Matthew T.
Принадлежит:

Apparatuses, systems and method for utilizing multi-zoned combustion chambers (and/or multiple combustion chambers) for achieving compression ignition (and/or spark-assisted or fuel-assisted compression ignition) in an internal combustion engine are provided. In addition, improved apparatuses, systems and methods for achieving and/or controlling compression ignition (and/or spark-assisted or fuel-assisted compression ignition) in a “Siamese cylinder” internal combustion engine are provided. 1. An internal combustion engine comprising:a cylinder;a piston located within said cylinder, said piston being configured to move between a top-dead-center (“TDC”) configuration and a bottom-dead-center (“BDC”) configuration, thereby defining a stroke of said piston;a central protuberance extending from a top surface of said piston; anda cylinder head enclosing said piston within said cylinder, thereby defining a combustion chamber, said cylinder head defining a central recess for receiving said central protuberance when said piston is at the TDC configuration,wherein said combustion chamber is divided into a primary chamber and a secondary chamber when said central protuberance is received by said central recess.2. The engine of claim 1 , further comprising a valve located within said central recess.3. The engine of claim 2 , wherein said valve helps to reduce trap volume within said combustion chamber.4. The engine of claim 2 , wherein said valve prevents and/or reduces carbon buildup and/or catastrophic interference.5. The engine of claim 2 , wherein said valve helps to ensure a homogenous mixture within said combustion chamber.6. The engine of claim 1 , wherein said central protuberance defines a cylindrical shape.7. The engine of claim 6 , wherein said central protuberance is concentric with said piston.8. The engine of claim 1 , wherein ignition within said secondary chamber occurs after said piston has moved past top dead center of said stroke.9. The engine of claim 1 , ...

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Номер записи: 67
14-03-2019 дата публикации

Diesel engine particulate filter regeneration system and methods

Номер: US20190078523A1
Автор: Eric James Kastanis, Eric Matthew Kurtz
Принадлежит: FORD GLOBAL TECHNOLOGIES LLC

Methods and systems for supplying post injection fuel to a two stroke diesel engine are described. In one example, post injection fuel timing is adjusted responsive to an amount of internal residual combustion products in a cylinder so that less post injected fuel may be trapped in the cylinder for a subsequent cycle of the cylinder. The start of post injection fuel timing and the amount of post injection fuel may be adjusted responsive to internal residual in the cylinder.

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Номер записи: 68
22-03-2018 дата публикации

VARIABLE HOLE SIZE NOZZLE AND SPRAY ANGLE FUEL INJECTOR AND MHBIB

Номер: US20180080422A1
Автор: HENDERSON Foy C., Husmeier Frank, MAHATO Chandan
Принадлежит: Cummins Inc.

A fuel injector, comprising a nozzle body having a proximal end and a distal end, an upper row of nozzle holes being equally spaced about a first circumference of the nozzle body, and a lower row of nozzle holes located between the distal end and the upper row of nozzle holes, wherein the upper row has a first number of holes that is greater than a second number of holes in the lower row and wherein one of the first number of holes and the second number of holes is odd. 1. A piston , comprising;a piston crown extending along a circumference of the piston and defining a top surface of the piston, the piston crown defining a volume configured to receive fuel;a first piston bowl located radially inward of the piston crown, the first piston bowl having a bottom surface and a greatest diameter at an interface between an outer annular wall of the first piston bowl and the top surface of the piston;a second piston bowl located radially inward of the bottom surface of the first piston bowl and having an upper edge located below the top surface of the piston;a third piston bowl located radially inward of the second piston bowl and having an upper edge located below the top surface of the piston; anda frustoconical portion located radially inward of a bottom of the third piston bowl and having an upper surface located below the top surface of the piston.2. The piston of claim 1 , further including a frustoconical outer floor portion joining an inner wall of the second piston bowl and an outer wall of the third piston bowl forming an inlet lip.3. The piston of claim 1 , wherein the first claim 1 , the second and the third piston bowls each include annular concave portions.4. The piston of claim 1 , wherein a fuel injection nozzle is configured to provide a plume of fuel that corresponds to a shape of the piston.5. The piston of claim 1 , wherein the piston crown has an inner lower surface that matches a bottom surface of the piston crown.6. A combustion system claim 1 , ...

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Номер записи: 69
24-03-2016 дата публикации

DIRECT INJECTION DIESEL ENGINE

Номер: US20160084148A1
Автор: Hasegawa Manabu, Nakano Masahiko, TSUJI Naohide, UEHARA Isshou
Принадлежит:

Fuel injection nozzle () disposed in a center of reentrant cavity combustion chamber () has first and second nozzle hole groups whose inclination angles with respect to cylinder center axis line are different, one is large inclination angle and the other is small inclination angle. Nozzle hole diameter of second nozzle hole group is larger than that of the first one. First and second nozzle holes are alternately arranged in a circumferential direction. Glow plug () projects, in a height direction of cylinder (), up to a height of spray center axis line (F) of the second nozzle hole directed at a lower side, therefore glow plug () can contact fuel masses formed by sprays from both first and second nozzle holes. Glow plug () is positioned between spray center axis lines (F F) in the circumferential direction, and positioned at swirl downstream side of spray center axis line (F). 1. A direct injection diesel engine in which a swirl is produced in a cylinder , comprising:a cavity combustion chamber formed in a middle of a top surface of a piston;a fuel injection nozzle having a plurality of nozzle holes, the fuel injection nozzle disposed at a substantially center position of the cavity combustion chamber; anda glow plug projecting from a ceiling surface of the cavity combustion chamber so that a tip end portion of the glow plug is positioned in the cavity combustion chamber at a piston top dead center position, andthe fuel injection nozzle having a first nozzle hole group and a second nozzle hole group whose inclination angles with respect to a cylinder center axis line are different from each other,a plurality of first nozzle holes belonging to the first nozzle hole group being arranged so that a spray center axis line of each of the first nozzle holes is a radial shape, a plurality of second nozzle holes belonging to the second nozzle hole group being arranged so that a spray center axis line of each of the second nozzle holes is a radial shape, and the first and ...

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Номер записи: 70
23-03-2017 дата публикации

METHOD FOR MONITORING THE FUEL INJECTION OF AN INTERNAL COMBUSTION ENGINE WITH DIRECT INJECTION, IN PARTICULAR WITH COMPRESSION IGNITION, AND ENGINE USING SUCH A METHOD

Номер: US20170082013A1
Автор: LAGET Olivier, MARTINEZ Lionel, RICHARD Stéhane
Принадлежит: IFP ENERGIES NOUVELLES

The present invention relates to a fuel injection method for a compression-ignition direct-injection internal-combustion engine comprising at least a cylinder (), a cylinder head () carrying fuel injection means (), a piston () sliding in this cylinder, a combustion chamber () delimited on one side by upper face () of the piston comprising a teat () extending in the direction of the cylinder head and arranged in the centre of a concave bowl () with at least two mixing zones (Z, Z), said injection means projecting fuel in at least two fuel jet sheets () with different sheet angles (A, A), characterized in that it consists in injecting into the combustion chamber the fuel jets () of one () of the sheets in a radial direction (C) forming a non-zero angle (b) with the radial direction (C) of fuel jets () of the other sheet and in admitting the oxidizer in a swirling motion with a swirl number less than or equal to 1.5. 112. A fuel injection method for a compression-ignition direct-injection internal-combustion engine comprising at least a cylinder , a cylinder head carrying fuel injection means , a piston sliding in this cylinder , a combustion chamber delimited on one side by upper face of the piston comprising a teat extending in the direction of the cylinder head and arranged in the centre of a concave bowl with at least two mixing zones , said injection means projecting fuel in at least two fuel jet sheets with different sheet angles , a lower sheet of jet axis C for zone and an upper sheet of jet axis C for zone , characterized in that it consists in injecting into the combustion chamber the fuel jets of one of the sheets in a radial direction forming a non-zero angle with radial direction of fuel jets of the other sheet and in admitting the oxidizer in a swirling motion with a swirl number less than or equal to 1.5.2. A method as claimed in claim 1 , characterized in that it consists in injecting the fuel jets with an angular offset claim 1 , between two ...

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Номер записи: 71
12-03-2020 дата публикации

Diesel engine

Номер: US20200080468A1
Автор: Jun Kanzaki, Motoshi Kataoka, Sangkyu Kim, Shintaro Okada, Shinya Iida, Shun Namba, Tomonori Harada
Принадлежит: Mazda Motor Corp

A diesel engine comprises: a cylinder head covering one end of a cylinder; a piston having a crown surface opposed to the cylinder head, and performing a reciprocating movement within the cylinder; and a fuel injector attached to the cylinder head. The cylinder head is formed with an intake port so as to generate a swirl flow within the cylinder. The crown surface of the piston is formed with a cavity which is recessed toward an opposite side of the cylinder head and which has a circular shape in planar view, and a notch which is recessed radially outward from a peripheral edge of the cavity. The fuel injector is formed with an injection hole oriented toward an inside of the cavity.

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Номер записи: 72
19-06-2014 дата публикации

VARIABLE COMPRESSION RATIO DEVICE AND INTERNAL COMBUSTION ENGINE USING THE SAME

Номер: US20140165969A1
Автор: Choi Myungsik
Принадлежит:

A variable compression ratio device and an internal combustion engine are disclosed. The variable compression ratio device includes a main piston that moves in a reciprocating manner, a main combustion chamber having a volume that is varied by the main piston, a sub-compression chamber communicating with the main combustion chamber; a sub-piston configured to reciprocate in the sub-compression chamber to vary a volume of the sub-compression chamber; and a sub-piston reciprocating unit that reciprocates the sub-piston. Accordingly, the air-fuel ratio and output of the internal combustion engine can be improved. 1. A variable compression ratio device comprising:a main piston that moves in a reciprocating manner;a main combustion chamber, a volume thereof is varied by the main piston;a sub-compression chamber communicating with the main combustion chamber;a sub-piston configured to reciprocate in the sub-compression chamber to vary a volume of the sub-compression chamber; anda sub-piston reciprocating unit that reciprocates the sub-piston.2. The variable compression ratio device of claim 1 , wherein the sub-compression chamber is inclined at a predetermined angle with respect to the main compression chamber.3. The variable compression ratio device of claim 2 , wherein a bottom surface of the sub-piston is inclined at an angle substantially the same as the sub-compression chamber with respect to the main compression chamber.4. The variable compression ratio device of claim 1 , wherein the sub-compression chamber is of a cylindrical shape.5. The variable compression ratio device of claim 1 , wherein the sub-piston reciprocating unit comprises:a connecting rod one end thereof is connected to the sub-piston;an eccentric cam coupled to the other end of the connecting rod; anda rotating unit that rotates the eccentric cam.6. The variable compression ratio device of claim 5 , whereinthe eccentric cam is of a circular shape, andan eccentric rotary shaft is provided in the ...

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Номер записи: 73
25-03-2021 дата публикации

PISTON FOR INTERNAL COMBUSTION ENGINE

Номер: US20210087997A1
Автор: Diwakar Ramachandra, Domenech-Llopis Vicent
Принадлежит:

A piston for an internal combustion engine includes a piston wall defining an outer perimeter of the piston, and a piston face located at an end of the piston wall. The piston face includes a radially-extending outer face, and a combustion bowl formed therein and recessed from the outer face. The combustion bowl includes an upper bowl including a flat upper bowl radial surface recessed from the outer face a distance in the range from 3.5 to 4.5 millimeters, and a lower bowl including a lower bowl surface recessed to a maximum bowl depth from the flat upper bowl axial surface in the range from 10.4 to 13.4 millimeters. The piston face is axisymmetric about a piston central axis. 1. A piston for an internal combustion engine , comprising:a piston wall defining an outer perimeter of the piston; a radially-extending outer face; and', an upper bowl including a flat upper bowl axial surface recessed from the outer face a distance in the range from 3.5 to 4.5 millimeters; and', 'a lower bowl including a lower bowl surface recessed to a maximum bowl depth from the flat upper bowl axial surface in the range from 10.4 to 13.4 millimeters;, 'a combustion bowl formed therein and recessed from the outer face, the combustion bowl including, 'wherein the piston face is axisymmetric about a piston central axis., 'a piston face disposed at an end of the piston wall, the piston face including2. The piston of claim 1 , wherein the upper bowl radial surface is orthogonal to the piston central axis.3. The piston of claim 1 , wherein the lower bowl is defined by a lower bowl surface including:a concave surface portion; anda convex surface portion extending from the concave surface portion toward the piston central axis, wherein the maximum bowl depth is located in the concave surface portion.4. The piston of claim 3 , wherein the lower bowl surface is connected to the upper bowl axial surface via a bowl transition radius in the range of 0.32 to 0.52 millimeters.5. The piston of claim 4 , ...

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Номер записи: 74
19-03-2020 дата публикации

PISTON AND METHOD OF MANUFACTURING THEREOF

Номер: US20200088129A1
Автор: Bonanni Massimiliano, Fregni Paolo, Gaioli Simone
Принадлежит:

A piston and process for manufacturing a piston includes an upper part providing an upper combustion surface including a top land, a land ring and a combustion bowl. An undercrown surface is formed under the combustion bowl. A lower part including pin bosses and a piston skirt are formed under the undercrown surface. At least one of the upper part and the lower part are formed with metal injection molding. 1. A method of manufacturing a piston comprising an upper part providing an upper combustion surface including a top land , a land ring , a combustion bowl and an undercrown surface formed under the combustion bowl; and a lower part including pin bosses and a piston skirt formed under the undercrown surface , the method of manufacturing comprising:forming the upper part or the lower part with metal injection molding;preparing an injectable starting material including a binder and a metal powder;processing the injectable starting material to mold the upper part or the lower part with an injection machine; andleaching out the binder of the molded upper part or molded lower part after injection.2. The method of manufacturing of claim 1 , further comprising:sintering the molded upper part or molded lower part to obtain at least one metallic property.3. The method of manufacturing of claim 1 , wherein the injectable starting material contains more than 90% by weight of the metal powder.4. The method of manufacturing of claim 1 , wherein the injection molding is obtained at a working temperature lower than the melting temperature of the metal powder.5. The method of manufacturing of claim 1 , wherein the upper part is formed in a first blank and the lower part is formed in a second blank.6. The method of manufacturing of claim 1 , further comprising:performing sinter bonding to join the upper part and the lower part.7. The method of manufacturing of claim 1 , further comprising:performing induction welding or friction welding to join the upper part and the lower part.8. ...

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Номер записи: 75
19-03-2020 дата публикации

Engine and systems for an engine

Номер: US20200088130A1
Автор: Justin Thomas Brumberg
Принадлежит: GE Global Sourcing LLC, Transportation IP Holdings LLC

Various systems are provided a piston for an engine. The piston has a piston crown, which includes a plurality of protrusions for enhancing mixing in a combustion chamber. As one example, a piston crown includes a plurality of protrusions extending outward from a top surface of the piston crown and spaced apart from one another around a circumference of the piston crown, each protrusion of the plurality of protrusions increasing in height and decreasing in width as the protrusion extends outward from a central axis of the piston crown.

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Номер записи: 76
05-04-2018 дата публикации

Piston and Cylinder Features for Enhanced Squish Flow

Номер: US20180094569A1
Автор: Koci Chad Palmer, SVENSSON KENTH
Принадлежит: CATERPILLAR INC.

An internal combustion engine may include an engine block having a plurality of cylinders therein, with each cylinder being closed by a cylinder head. The internal combustion engine may also include a piston reciprocatingly mounted within each cylinder and defining a combustion chamber therebetween. The internal combustion engine may also include a fuel injector communicating fuel to the combustion chamber, the fuel creating a plurality of flames when ignited. The internal combustion engine may also include a piston crown extending from each piston and defining a piston bowl. The internal combustion engine may also include a rim depending from at least one of the cylinder head and piston and being provided radially inward from the piston crown. The internal combustion engine may also include a passageway configured within at least one of the piston crown and cylinder head and adapted to guide a squish flow between the piston crown, cylinder head and back toward the piston bowl to interact with the plurality of flames within the piston bowl for enhanced combustion. 1. An internal combustion engine comprising:an engine block having a plurality of cylinders therein, each cylinder being closed by a cylinder head;a piston reciprocatingly mounted within each cylinder and defining a combustion chamber therebetween;a fuel injector communicating fuel to the combustion chamber, the fuel creating a plurality of flames when ignited;a piston crown extending from each piston and defining a piston bowl;a rim depending from at least one of the cylinder head and piston and being provided radially inward from the piston crown; anda passageway configured within at least one of the piston crown and cylinder head and adapted to guide a squish flow between the piston crown and cylinder head and back toward the piston bowl to interact with the plurality of flames within the piston bowl for enhanced combustion.2. The internal combustion engine of claim 1 , wherein passageways are provided ...

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Номер записи: 77
05-04-2018 дата публикации

Piston with Flame Guiding Passageways

Номер: US20180094570A1
Автор: Koci Chad Palmer, SVENSSON KENTH
Принадлежит: CATERPILLAR INC.

An internal combustion engine may have a piston and a plurality of flame guiding passageways provided within the piston. The passageways may be configured within a circumferential wall of the piston to guide the one or more flames away from a stagnation point and to a mixing zone. 1. An internal combustion engine , comprising:an engine block having a plurality of cylinders therein;a piston reciprocatingly mounted within each cylinder and defining a combustion chamber therebetween;a fuel injector communicating fuel to the combustion chamber, the fuel creating a plurality of flames when ignited;a piston crown extending from each piston and defining a piston bowl, the bowl having a plurality of stagnation points and a plurality of mixing zones; anda plurality of passageways configured within the piston crown and adapted to guide flames away from the stagnation points and to the mixing zones.2. The internal combustion engine of claim 1 , wherein each passageway within the piston crown is configured to follow a curved path.3. The internal combustion engine of claim 2 , wherein each passageway completes approximately a 180 degree turn.4. The internal combustion engine of claim 1 , wherein each passageway within the piston crown has an entry point at one height and an exit point at a different height.5. The internal combustion engine of claim 3 , wherein each stagnation point is positioned radially inward from the piston crown.6. The internal combustion engine of claim 1 , wherein each of the mixing zones has a greater oxygen level than each of the stagnation points.7. The internal combustion engine of claim 1 , wherein each passageway extends within the piston crown a distance less than the circumference of the piston crown.8. A piston claim 1 , comprising:a cylindrical base;a circumferential wall extending from the cylindrical base;a piston bowl defined by the cylindrical base and the circumferential wall; anda passageway within the circumferential wall adapted to ...

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Номер записи: 78
28-03-2019 дата публикации

Combustion control device for compression autoignition engine

Номер: US20190093592A1
Автор: Atsushi Inoue, Kota Matsumoto, Tomonori Urushihara, Toru Miyamoto, Yudai Koshiro, Yusuke Kawai
Принадлежит: Mazda Motor Corp

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.

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Номер записи: 79
28-03-2019 дата публикации

AIR INTAKE DUCT AND COMBUSTION SYSTEM OF TURBOCHARGED GASOLINE ENGINE

Номер: US20190093595A1
Автор: Ding Shangfen, LI YUHUAI, LIU JUJIANG, LIU Zhuo, Zhan Wenfeng, Zhang Zhuyun
Принадлежит:

An air intake duct includes an air intake duct body () which includes an air intake part () and a connecting part () connected with the air intake part (). A first channel is formed inside the air intake part (), a second channel intercommunicating with the first channel is formed inside the connecting part (), one side of the connecting part () is provided with a connecting surface () which inclines towards an axis of the air intake duct body (), the connecting surface () is inclined and extended from a connection joint of the connecting part () and the air intake part () to an end portion of the connecting part (), and the first channel has a larger cross section area than the second channel. 1. An air intake duct , comprising an air intake duct body , the air intake duct body comprising an air intake part and a connecting part connected with the air intake part;wherein a first channel is formed inside the air intake part, a second channel intercommunicating with the first channel is formed inside the connecting part, one side of the connecting part is provided with a connecting surface which inclines towards an axis of the air intake duct body, the connecting surface is inclined and extended from a connection joint of the connecting part and the air intake part to an end portion of the connecting part, and the first channel has a larger cross section area than the second channel.2. The air intake duct according to claim 1 , wherein the air intake part is provided with an air intake surface which inclines towards the axis of the air intake duct body claim 1 , and the air intake surface is connected with the connecting surface.3. The air intake duct according to claim 2 , wherein the air intake surface is a convex cambered surface that is convex with respect to the axis of the air intake duct body claim 2 , or is an inclined plane inclining towards the axis of the air intake duct body.4. The air intake duct according to any one of to claim 2 , wherein the ...

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Номер записи: 80
06-04-2017 дата публикации

COMPRESSION ENGINE WITH DIRECT FUEL INJECTION WITH COMPRESSION IGNITION COMPRISING MEANS FOR COOLING THE PISTON

Номер: US20170096978A1
Автор: LAGET Olivier, MARTINEZ Lionel, RICHARD Stephane
Принадлежит:

The present invention relates to a compression-ignition direct-injection internal-combustion engine comprising at least a cylinder (), a cylinder head () carrying fuel injection means () projecting the fuel in at least two fuel jet sheets () with different sheet angles (A A), a piston () sliding in this cylinder, a combustion chamber () delimited on one side by upper face () of the piston comprising a teat () extending in the direction of the cylinder head and arranged in the centre of a concave bowl () with at least two mixing zones (Z Z), and piston cooling means () housed in the material of the piston. 1. A compression-ignition direct-injection internal-combustion engine comprising at least a cylinder , a cylinder head carrying fuel injection means projecting the fuel in at least two fuel jet sheets with different sheet angles , a piston sliding in this cylinder , a combustion chamber delimited on one side by upper face of the piston comprising a teat extending in the direction of the cylinder head and arranged in the centre of a concave bowl with at least two mixing zones , and piston cooling means housed in the material of the piston , characterized in that the cooling means comprise at least one circumferential gallery concentric to piston bowl and arranged opposite at least one mixing zone2. An internal-combustion engine as claimed in claim 1 , characterized in that the shape of the section of gallery is a cylindrical shape.3. An internal-combustion engine as claimed in claim 1 , characterized in that the cross-sectional area of gallery ranges between 20 mmand 200 mm.4. An internal-combustion engine as claimed in claim 1 , characterized in that the surface area of one gallery is different from the surface area of the other gallery.5. An internal-combustion engine as claimed in claim 1 , characterized in that gallery extends opposite the two mixing zones.6. An internal-combustion engine as claimed in any one of the claim 1 , characterized in that distances ...

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Номер записи: 81
14-04-2016 дата публикации

CYLINDER HEAD FOR AN AUTO-IGNITION ENGINE WITH DIRECT INJECTION

Номер: US20160102629A1
Автор: Heinig Klaus-Peter, Huth Florian, Quix Hans Guenter
Принадлежит:

An auto-ignition engine system is provided. The auto-ignition engine system includes a cylinder having an intake valve and an exhaust valve coupled thereto, an opening in a cylinder head defining a portion of the boundary of the cylinder, a glow plug heating element extending through the opening into the cylinder, an insert at least partially surrounding a glow plug heating element and coupled thereto, and an adjustment mechanism configured to alter the position of the glow plug heating element and the insert in the cylinder. 1. A cylinder head for an auto-ignition engine with direct injection , in a motor vehicle , comprising:a main body which has at least one opening for an injection valve and at least one receiving region for a glow plug, the main body including;an insert which is arranged in the receiving region and which is provided for at least partially receiving the glow plug and which is linearly displaceable relative to the main body such that a volume, which can be at least partially delimited by the main body, of a combustion chamber of the auto-ignition engine can be varied, the insert being displaceable between a first position and a second position, and a second compression ratio based on the volume of the combustion chamber in the second position being higher than a first compression ratio based on the volume of the combustion chamber in the first position.2. The cylinder head as claimed in claim 1 , where the insert is displaceable together with the glow plug in a manner dependent on the operating temperature of the auto-ignition engine.3. The cylinder head as claimed in claim 1 , where the insert is displaceable together with the glow plug in a manner independent of the operating temperature of the auto-ignition engine.4. The cylinder head as claimed in claim 1 , further comprising a displacement arrangement which is provided for displacing the insert together with the glow plug.5. The cylinder head as claimed in claim 4 , where the displacement ...

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Номер записи: 82
12-04-2018 дата публикации

Combustion bowl of a piston for an engine

Номер: US20180100466A1
Автор: Abhijitsinha Dilipsinha Pawar, Adwait Vilas Joshi, Brandon Lee Bowditch, David Andrew Pierpont, Kalyana Chakravarthy Vutukuri
Принадлежит: Caterpillar Inc

A piston for an engine may include a piston body. The piston body may include a piston crown disposed symmetrically about a central longitudinal axis of the piston. A combustion bowl may be recessed into the piston body and may be offset axially inwardly with respect to the piston crown. A central bowl apex may protrude axially from the combustion bowl and may be offset axially inwardly with respect to the piston crown. A first bowl apex may protrude axially from the combustion bowl and may be disposed radially inwardly with respect to the piston crown. A second bowl apex may protrude axially from the combustion bowl and may be disposed radially inwardly with respect to the first bowl apex and may be radially between the first bowl apex and the central bowl apex. The second bowl apex may be offset axially inwardly with respect to the central bowl apex.

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Номер записи: 83
26-03-2020 дата публикации

Piston Design for Flow Re-Direction

Номер: US20200095920A1
Автор: ANDERS Jonathan W., Dempsey Adam, Svensson Kenth I.
Принадлежит: CATERPILLAR INC.

A piston for an internal combustion engine includes a crown portion having a bowl that includes a plurality of protrusions. Each of the plurality of protrusions includes a first side surface and a second side surface. Other features including at least one ledge formed between protrusions in segments, and a generally flat, inward facing surface on the protrusions may also be used. 1. An internal combustion engine , comprising:an engine block having a cylinder bore;a cylinder head having a flame deck surface disposed at one end of the cylinder bore;an air intake valve associated with the cylinder head and configured to open and allow a flow of intake charge into the cylinder bore;a piston connected to a rotatable crankshaft and configured to reciprocate within the cylinder bore, the piston having a crown portion facing the flame deck surface such that a combustion chamber is defined within the cylinder bore and between a top surface of the crown portion and the flame deck surface, the crown portion including a piston bowl having a generally concave shape and extending within the crown portion and a wall, the wall extending peripherally around the piston;a fuel injector having a nozzle tip disposed in fluid communication with the combustion chamber, the nozzle tip having a plurality of nozzle openings configured to inject a plurality of fuel jets into the combustion chamber, each of the plurality of fuel jets being provided along a respective fuel jet centerline;a plurality of protrusions disposed in the piston bowl adjacent the wall, each of the plurality of protrusions including a first side surface and a second side surface; andat least one ledge extending at least partially through an inner face and towards an outer face of the wall, the at least one ledge extending at a depth that is less than a depth of the piston bowl.2. The internal combustion engine of claim 1 , wherein the at least one ledge is disposed between two adjacent protrusions from the plurality of ...

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Номер записи: 84
26-03-2020 дата публикации

Internal Combustion Engine and Method for Its Operation

Номер: US20200095921A1
Автор: Svensson Kenth I.
Принадлежит: CATERPILLAR INC.

In internal combustion engine, a fuel injector has a nozzle tip forming first and second pluralities of nozzle openings configured to inject respective pluralities of first and second fuel jets into a combustion chamber. The first fuel jets are directed between projections formed in a piston during a main injection, and the second fuel jets are directed towards the protrusions during a post injection. The protrusions are asymmetrical to redirect the first fuel jets. 1. An internal combustion engine , comprising:an engine block having a cylinder bore;a cylinder head having a flame deck surface disposed at one end of the cylinder bore;at least one intake valve associated with the cylinder head and configured to open and allow a flow of intake charge into the cylinder bore;a piston connected to a rotatable crankshaft and configured to reciprocate within the cylinder bore, the piston having a crown portion facing the flame deck surface such that a combustion chamber is defined within the cylinder bore and between a top surface of the crown portion and the flame deck surface, the crown portion including a piston bowl having a generally concave shape and extending within the crown portion and a wall, the wall extending peripherally around the piston;a fuel injector having a nozzle tip disposed in fluid communication with the combustion chamber, the nozzle tip having a first plurality of nozzle openings configured to inject a plurality of first fuel jets into the combustion chamber, each of the plurality of first fuel jets being provided along a respective first fuel jet centerline;a plurality of protrusions disposed in the piston bowl adjacent the wall, each of the plurality of protrusions including a first side surface and a second side surface, the first side surface having a generally concave shape, the second side surface having a generally flat or convex shape, wherein each of the plurality of protrusions is disposed between two adjacent respective first fuel jet ...

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Номер записи: 85
26-03-2020 дата публикации

DIESEL PISTON WITH RADIAL LIPS IN LOWER BOWL

Номер: US20200095922A1
Автор: Pesce Francesco Concetto, TRIPODI Andrea, Vassallo Alberto Lorenzo
Принадлежит:

A piston for a diesel engine includes a piston body having a skirt and crown. The piston body has portions defining an outer combustion bowl and an inner combustion bowl within the piston body through the crown. The outer combustion bowl has an upper annular side wall extending from the crown surface and an annular flat shelf extending from the upper annular side wall. The inner combustion bowl is recessed with respect to the annular flat shelf of the outer combustion bowl. The inner combustion bowl has a curved annular side wall and a plurality of protruding lips extending from the curved annular side wall toward a central axis of the piston body. 1. A piston for a diesel engine , comprising:a piston body having a skirt extending from a proximal end of the piston body; anda crown disposed at a distal end of the piston body and defining a crown surface, the piston body having portions defining an outer combustion bowl and an inner combustion bowl within the piston body through the crown, the outer combustion bowl having an upper annular side wall extending from the crown surface and an annular flat shelf extending from the upper annular side wall, the inner combustion bowl being recessed with respect to the annular flat shelf of the outer combustion bowl, the inner combustion bowl having a curved annular side wall and a plurality of protruding lips extending from the curved annular side wall toward a central axis of the piston body.2. The piston of claim 1 , each protruding lip of the plurality of protruding lips being equally spaced about the central axis.3. The piston of claim 2 , each protruding lip of the plurality of protruding lips having a height between 2.5 and 5.5 millimeters claim 2 , the height extending from a base of a protruding lip along the curved annular side wall to a distal end of the respective protruding lip.4. The piston of claim 3 , wherein the plurality of protruding lips includes at least seven protruding lips and fewer than eleven ...

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Номер записи: 86
23-04-2015 дата публикации

PISTON OF AN INTERNAL COMBUSTION ENGINE

Номер: US20150107559A1
Автор: Böwing Robert, Drehobl Enrico, Drexel Christian, Rapp Manfred
Принадлежит: Caterpillar Energy Solutions GmbH

An engine block of an internal combustion engine is disclosed. The engine block may have a piston and at least one gas exchange valve. The piston may have a piston skirt having a first center axis. The piston may also have a piston head delimiting the piston skirt at the top with a diameter D. The piston head may have a piston head edge and a piston head recess with a piston recess wall having a height H. At least one valve pocket may be formed into the piston head edge. The at least one valve pocket may have a valve pocket depth T with respect to the piston head edge. The valve pocket depth T may fulfil the following condition with respect to the wall height H: 0.05 H<=T<=0.5H. 1. A piston of an internal combustion engine , comprising:a piston skirt having a centre axis; and a piston head edge; and', 'a piston head recess with a piston recess wall having a wall height H; and, 'a piston head delimiting the piston skirt to a top, the piston head having a diameter D and includingat least one valve pocket formed in the piston head edge, the at least one valve pocket having a valve pocket depth T with respect to the piston head edge, wherein the valve pocket depth T with respect to the wall height H fulfils the following condition, at least in the region of the piston recess wall: 0.5 H<=T<=0.5 H.2. The piston according to claim 1 , wherein the at least one valve pocket has a valve pocket bottom with a surface normal arranged in an inclined manner relative to the centre axis by an angle β claim 1 , with 1°<=β<=25° claim 1 , wherein the depth T increases towards the piston head recess.3. An engine block of an internal combustion engine claim 1 , comprising: a piston skirt having a first centre axis; and', a piston head edge; and', 'a piston head recess with a piston recess wall having a wall height H; and, 'a piston head delimiting the piston skirt to a top, with a diameter D, wherein the piston head includes, 'at least one valve pocket formed in the piston head edge;', ...

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Номер записи: 87
20-04-2017 дата публикации

LEAN BURN INTERNAL COMBUSTION ENGINE

Номер: US20170107938A1
Автор: ASSANIS Dimitris, Engineer Nayan, NEUMAN Paul, WOOLDRIDGE Margaret S.
Принадлежит:

An internal combustion engine having a fuel injector, a piston chamber, a piston slidably disposed in the piston chamber having a piston crown along a top surface, a head assembly having at least one pre-chamber separate from the piston chamber and in fluid communication with the piston chamber via at least one connecting orifice, and an ignition device disposed in the pre-chamber for igniting a fuel air mixture within the pre-chamber, thereby producing an ignition jet being introduced into the piston chamber via the at least one connecting orifice to ignite a fuel/air mixture in the piston chamber. The fuel/air mixture is passively introduced into the at least one pre-chamber during at least a compression stroke of the piston. 1. An internal combustion engine comprising:a fuel injector;a piston chamber;a piston slidably disposed in the piston chamber, the piston having a piston crown along a top surface;a head assembly having at least one pre-chamber separate from the piston chamber and in fluid communication with the piston chamber via at least one connecting orifice, said head assembly having an intake port and an exhaust port; andan ignition device disposed in the pre-chamber for igniting a fuel air mixture within the pre-chamber, thereby producing an ignition jet being introduced into the piston chamber via the at least one connecting orifice to ignite a fuel/air mixture in the piston chamber,wherein a fuel/air mixture is passively introduced into the at least one pre-chamber during at least a compression stroke of the piston.2. The internal combustion engine according to wherein the head assembly comprising at least a pair of pre-chambers in fluid communication with the piston chamber.3. The internal combustion engine according to wherein the at least a pair of pre-chambers are diametrically opposed to each other within the piston chamber.4. The internal combustion engine according to wherein the fuel/air mixture that is passively introduced into the pre- ...

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Номер записи: 88
11-04-2019 дата публикации

PISTON AND METHOD OF MANUFACTURING THEREOF

Номер: US20190107076A1
Автор: Bonanni Massimiliano, Fregni Paolo, Gaioli Simone
Принадлежит:

A piston and process for manufacturing a piston includes an upper part providing an upper combustion surface including a top land, a land ring and a combustion bowl. An undercrown surface is formed under the combustion bowl. A lower part including pin bosses and a piston skirt are formed under the undercrown surface. At least one of the upper part and the lower part are formed with metal injection molding. 1. A piston , comprising:an upper part providing an upper combustion surface including a top land, a ring land, a combustion bowl and an undercrown surface formed under the combustion bowl; anda lower part including pin bosses and a piston skirt formed under the undercrown surface, wherein at least one of the upper part and the lower part are formed with metal injection molding.2. The piston of claim 1 , wherein the upper part and the lower part are formed as one piece.3. The piston of claim 1 , wherein the upper part and the lower part are formed of two pieces.4. The piston of claim 1 , wherein at least one of the upper part and the lower part are formed with metal injection molding and at least one of the upper part and the lower part are formed with another process.5. The piston of claim 4 , wherein the other process comprises at least one of forging claim 4 , casting and billet machining.6. The piston of claim 1 , further comprising a cooling gallery.7. The piston of claim 6 , wherein the cooling gallery is formed by more than one part.8. The piston of claim 6 , wherein the upper part forms a top surface of the cooling gallery.9. The piston of claim 6 , wherein the lower part forms a bottom surface of the cooling gallery.10. The piston of claim 1 , where the upper part and the lower part are joined after machining and finishing claim 1 , and assembled together with a piston pin.11. An engine claim 1 , comprising:a piston, wherein the piston includes:an upper part providing an upper combustion surface, a combustion bowl and an undercrown surface formed under ...

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Номер записи: 89
27-04-2017 дата публикации

METHOD OF INJECTING FUEL INTO THE COMBUSTION CHAMBER OF AN INTERNAL-COMBUSTION ENGINE RUNNING IN SINGLE-FUEL OR MULTI-FUEL MODE

Номер: US20170114730A1
Автор: LAGET Olivier, MARTINEZ Lionel, RICHARD Stephane
Принадлежит:

The present invention is a fuel injection method for a compression-ignition internal-combustion engine running in single-fuel or multi-fuel mode. The engine has at least a cylinder (), a piston () sliding in the cylinder, a combustion chamber () comprising two mixing zones (Z Z) which are defined on one side by upper face of the piston comprising a projection extending in the direction of the cylinder head and located in a center of a concave bowl (), a cylinder head () carrying fuel injection () projects liquid fuel (Fuel) in at least two fuel jet sheets () with different sheet angles (A A), and intake () for an oxidizer and burnt gas exhaust ().The method, in a single-fuel mode, injects liquid fuel (Fuel) into lower zone (Z) and/or upper zone (Z) of the combustion chamber and, in a multi-fuel mode, provides in the chamber mixing of an oxidizer with another fuel (Fuel) and of injection of liquid fuel (Fuel) into lower zone (Z) or both zones (Z Z) of the combustion chamber. 113-. (canceled)14. A fuel injection method for a compression-ignition internal-combustion engine running in a single-fuel or a multi-fuel mode , the engine comprising at least a cylinder , a piston sliding in the cylinder , a combustion chamber comprising two mixing zones and defined on one side by upper face of the piston comprising a projection extending in a direction of the cylinder head and located in a center of a concave bowl and a cylinder head carrying fuel injection which projects liquid fuel in at least two fuel jet sheets with different sheet angles , with a lower sheet for a lower zone and an upper sheet for upper mixing zone , an intake for an oxidizer and a burnt gas exhaust , and wherein in the single-fuel mode liquid fuel is injected into the at least one of the zone lower , and in the multi-fuel mode , an oxidizer in the chamber for mixing with another fuel and injecting the liquid fuel into lower zone or into both the lower and upper zones of the combustion chamber.15. A ...

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Номер записи: 90
27-04-2017 дата публикации

Ducted fuel injection

Номер: US20170114998A1
Автор: Charles J. Mueller
Принадлежит: Sandia Corp

Various technologies presented herein relate to enhancing mixing inside a combustion chamber to form one or more locally premixed mixtures comprising fuel and charge-gas to enable minimal, or no, generation of soot and/or other undesired emissions during ignition and subsequent combustion of the locally premixed mixtures. To enable sufficient mixing of the fuel and charge-gas, a jet of fuel can be directed to pass through a bore of a duct causing charge-gas to be drawn into the bore creating turbulence to mix the fuel and the drawn charge-gas. The duct can be located proximate to an opening in a tip of a fuel injector. The various technologies presented herein can be utilized in a number of combustion systems, such as compression-ignition (CI) reciprocating engines, spark-ignition (SI) reciprocating engines, gas-turbine (GT) engines, burners and boilers, wellhead/refinery flaring, etc.

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Номер записи: 91
18-04-2019 дата публикации

Diesel engine having reentrant combustion chamber

Номер: US20190112968A1
Автор: Chang-Yeol Choi, Egert Michael DI, Haeng-Pyo HEO, Jun Yu, THELLIEZ Marina, Tokaji Balazs
Принадлежит: AVL List GmbH, Hyundai Motor Co, Kia Motors Corp

A reentrant combustion chamber is disclosed. The reentrant combustion chamber includes a profile forming the inlet of the combustion chamber that is a projective surface formed inward in the combustion chamber and the bottom of the combustion chamber that is a recessed space that is recessed outward under the inlet in the combustion chamber, a cone formed in a truncated cone shape continuing from the profile and protruding to the central space in the combustion chamber, and a top end for expanding the space of the combustion chamber by expanding the top of the combustion chamber at the inlet of the combustion chamber.

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Номер записи: 92
13-05-2021 дата публикации

Fuel Injection Control Device

Номер: US20210140388A1
Автор: Kenichiroh Ogata, Masayuki Saruwatari, Ryo KUSAKABE, Yoshihiro Sukegawa
Принадлежит: Hitachi Astemo Ltd

Combustion stability can be improved while HC and PN discharged from a combustion chamber are prevented. In an ECU that controls a fuel injection device installed in a combustion chamber of an internal-combustion engine so as to be able to inject fuel in a direction intersecting with a sliding direction of a piston, a pressure value of the fuel supplied to the fuel injection device is acquired, control is performed such that the fuel injection device injects the fuel at least twice in a compression stroke, and control is performed such that fuel injection timing of at least one time in the compression stroke is advanced earlier than fuel injection timing of a time corresponding to the high pressure value of the fuel when the acquired fuel pressure value is low.

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Номер записи: 93
05-05-2016 дата публикации

Four-Cycle Internal Combustion Engine with Curtailed Intake Process

Номер: US20160123220A1
Автор: Kristani Filip
Принадлежит:

A four-cycle naturally-aspirated internal combustion engine has a permanent curtailed intake process, which allows the temperature and pressure of intake air to the combustion cylinders to be tightly controlled, and enables a very small combustion chamber so that a much higher compression ratio and pre-ignition compression pressure can be achieved without approaching the air/fuel mixture auto-ignition threshold. The maximum threshold of curtailed intake volume is determined to be 68% of engine cylinder volume to achieve a compression ratio CR of 18 or higher. Because this design can effectively regulate and set the maximum pre-ignition temperature of the fuel-air mixture, it can combust virtually any type of liquid hydrocarbon fuel without knocking. This four-cycle engine, due to its higher compression ratio, generates power equivalent to or greater than a standard four-cycle engine in a smaller and lighter engine and at a much higher efficiency. 1. A naturally aspirated four-cycle spark ignition “Curtailed Intake Process” internal combustion , comprising:one or more combustion cylinders, each cylinder having a total cylinder volume, a top dead center (TDC) and a bottom dead center (BDC), and each cylinder having one or more intake valves, and each cylinder containing an axially reciprocating piston mechanically connected to a crankshaft and a flywheel, wherein each cylinder is configured to execute a four-cycle combustion process, comprising a permanent curtailed intake cycle that requires a minimized combustion chamber volume corresponding to an engine compression ratio (CR) of 18 or higher, during which curtailed intake cycle one or more of the intake valves remain open and the piston moves axially from the TDC of the cylinder through a crankshaft intake angle interval and draws a curtailed intake volume of an air-fuel mixture through the intake valves into the cylinder, followed by a compression cycle, during which all intake valves are closed and the piston ...

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Номер записи: 94
03-05-2018 дата публикации

OIL-INJECTED SCREW AIR COMPRESSOR

Номер: US20180119600A1
Автор: CHEN Sheng-Kun, LIN Feng-Yung, LU Ming-Te, WEBER Viktor
Принадлежит:

An oil-injected screw air compressor includes a first stage compression chamber, an air buffering chamber coupled to the first stage compression chamber, a second stage compression chamber coupled to the air buffering chamber, an oil cooling device for cooling lubricating oil for the first stage compression chamber, the air buffering chamber and the second stage compression chamber, a plurality sensors respectively located at outlets of the first stage compression chamber, the air buffering chamber and the second stage compression chamber, and a control unit respectively and dynamically controlling flow rates of the lubricating oil entering into the first stage compression chamber, the air buffering chamber and the second stage compression chamber according to temperature and pressure data measured by the sensors. 1. An oil-injected screw air compressor , comprising:a first stage compression chamber;an air buffering chamber coupled to the first stage compression chamber;a second stage compression chamber coupled to the air buffering chamber;an oil cooling device for cooling lubricating oil for the first stage compression chamber, the air buffering chamber and the second stage compression chamber;a plurality sensors respectively located at outlets of the first stage compression chamber, the air buffering chamber and the second stage compression chamber; anda control unit respectively and dynamically controlling flow rates of the lubricating oil entering into the first stage compression chamber, the air buffering chamber and the second stage compression chamber according to outlet pressure and outlet temperature data measured by the sensors, and temperature data and humidity data of an environment.2. The oil-injected screw air compressor of claim 1 , further comprising a plurality control valves and a plurality of oil pipes respectively coupled between the oil cooling device and the first stage compression chamber claim 1 , the oil cooling device and the air buffering ...

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Номер записи: 95
03-05-2018 дата публикации

Two-stage oil-injected screw air compressor

Номер: US20180119601A1
Автор: Sheng-kun Chen, Viktor Weber, Yin-Ching LIN, Yu-Feng Wu
Принадлежит: ALMIG KOMPRESSOREN GmbH, Fusheng Industrial (Shanghai) Co Ltd

A two-stage oil-injected screw air compressor includes an integrated compression casing, and the integrated compression casing further includes a first stage compression chamber, an intermediate cooling channel, and a second stage compression chamber parallel stacked in the integrated compression casing. A straightforward oil injector aims at the intermediate cooling channel to spray lubricating oil into the intermediate cooling channel.

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Номер записи: 96
03-05-2018 дата публикации

OIL-INJECTED SCREW AIR COMPRESSOR

Номер: US20180119602A1
Автор: CHEN Sheng-Kun, LU Ming-Te, WEBER Viktor, YAN Li-Yung
Принадлежит:

An oil-injected screw air compressor includes a first stage compression chamber, an air buffering chamber coupled to the first stage compression chamber, a second stage compression chamber coupled to the air buffering chamber, a first oil cooling device for cooling lubricating oil for the first stage compression chamber and the air buffering chamber, a second oil cooling device for cooling lubricating oil for the second stage compression chamber and the first oil cooling device, a plurality sensors respectively located at the first stage compression chamber outlet and the second stage compression chamber outlet, and a control unit respectively and dynamically controlling the first oil cooling device and the second oil cooling device according to preset pressure and temperature data measured by the sensors or pressure and temperature data measured by the sensors, and temperature data and humidity data of an environment. 1. An oil-injected screw air compressor , comprising:a first stage compression chamber;an air buffering chamber coupled to the first stage compression chamber;a second stage compression chamber coupled to the air buffering chamber;a first oil cooling device for cooling lubricating oil for the first stage compression chamber and the air buffering chamber;a second oil cooling device for cooling lubricating oil for the second stage compression chamber and the first oil cooling device, wherein the first oil cooling device and the second oil cooling device are connected in series or parallel;a plurality sensors respectively located at the first stage compression chamber and the second stage compression chamber; anda control unit respectively and dynamically controlling the first oil cooling device and the second oil cooling device according to preset pressure and temperature data measured by the sensors or pressure and temperature data measured by the sensors, and temperature data and humidity data of an environment.2. The oil-injected screw air compressor ...

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Номер записи: 97
03-05-2018 дата публикации

Piston Design for Flow Re-Direction

Номер: US20180119603A1
Автор: ANDERS Jonathan W., Delvecchio Kerry A., John Bobby
Принадлежит: CATERPILLAR INC.

An internal combustion engine includes an engine block having a cylinder bore and a cylinder head having a flame deck surface disposed at one end of the cylinder bore. A piston connected to a rotatable crankshaft and configured to reciprocate within the cylinder bore has a piston crown portion facing the flame deck surface such that a combustion chamber is defined within the cylinder bore and between the piston crown and the flame deck surface. A fuel injector having a nozzle tip disposed in fluid communication with the combustion chamber has at least one nozzle opening configured to inject a fuel jet into the combustion chamber along a fuel jet centerline. At least one arcuate indent is formed in the top surface in aligned fashion with the fuel jet and including an entry surface, a recirculation surface and a wall. 1. An internal combustion engine , comprising:an engine block having at least one cylinder bore;a cylinder head having a flame deck surface disposed at one end of the cylinder bore;a piston connected to a rotatable crankshaft and configured to reciprocate within the cylinder bore, the piston having a crown portion facing the flame deck surface such that a combustion chamber is defined within the cylinder bore and between a top surface of the crown portion and the flame deck surface;a fuel injector having a nozzle tip disposed in fluid communication with the combustion chamber, the nozzle tip having at least one nozzle opening configured to inject a fuel jet into the combustion chamber and along a fuel jet centerline;at least one arcuate indent formed in the top surface, the at least one arcuate indent being aligned with the fuel jet centerline and including an entry surface extending from a central portion of the piston, a recirculation surface having a concave shape and extending along a spiral direction adjacent the entry surface, and a wall extending generally in an axial direction and disposed radially along the recirculation surface.2. The internal ...

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Номер записи: 98
14-05-2015 дата публикации

Piston Having Combustion Bowl Shaped to Balance Combustion Efficiency and Emission Properties

Номер: US20150128899A1
Автор: Easley William L., Pierpont David A., Timmons John P., Venkatasubramaniam Karthikeyan C.
Принадлежит: CATERPILLAR INC.

A piston for an internal combustion engine includes a piston body having an outer cylindrical surface defining a longitudinal piston axis, a combustion face defining a compound combustion bowl, and a compound rim extending radially outward from the compound combustion bowl to the outer cylindrical surface. The compound combustion bowl includes a convex inner bowl surface defining a conical projection and a concave outer bowl surface. The compound rim includes a flat outer rim surface adjoining the outer cylindrical surface, and a convex inner rim surface adjoining the compound combustion bowl. The convex inner bowl surface transitions smoothly to the concave outer bowl surface, and the convex inner rim surface transitions abruptly to the concave outer bowl surface at an edge of the compound combustion bowl. 1. A piston for an internal combustion engine , the piston comprising: an outer cylindrical surface defining a longitudinal piston axis;', 'a combustion face defining a compound combustion bowl; and', 'a compound rim extending radially outward from the compound combustion bowl to the outer cylindrical surface,, 'a piston body including'}the compound combustion bowl including a convex inner bowl surface defining a conical projection and a concave outer bowl surface,the compound rim including a flat outer rim surface adjoining the outer cylindrical surface, and a convex inner rim surface adjoining the compound combustion bowl,a cone angle of the conical projection is less than or equal to about 135 degrees, the concave outer bowl surface has a first radius of curvature ranging from 7 mm to 20 mm, and the convex inner bowl surface transitions smoothly to the concave outer bowl surface, andthe convex inner rim surface transitions abruptly to the concave outer bowl surface at an edge of the compound combustion bowl, and the convex inner rim surface has a second radius of curvature ranging from 40 mm to 70 mm, such that the edge of the compound combustion bowl is ...

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Номер записи: 99
04-05-2017 дата публикации

Piston for internal combustion engine

Номер: US20170122250A1
Автор: Hideo Yamashita
Принадлежит: Toyota Motor Corp

On a piston top surface, a cavity and two valve recesses are formed. On the piston top surface, a first heat insulating film is formed. However, on edge portions, a second heat insulating film different from the first heat insulating film is formed. The second heat insulating film is formed along the edge portions. The first heat insulating film is composed of porous alumina and a sealer. The second heat insulating film is composed of only porous alumina.

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Номер записи: 100