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公开(公告)号：US20240360808A1
公开(公告)日：2024-10-31
申请号：US18644365
申请日：2024-04-24
发明人： Björn DIRUMDAM , Thomas KLAUA
摘要： A fuel injector supplying fuel to a combustion chamber of an internal combustion engine, having a main body, a first nozzle needle moveably guided in a first needle guide, a first needle fuel chamber interacting with the first nozzle needle for a first liquid fuel, coupled to the combustion chamber by first channels. The first channels, via first inner openings, are connected to the first needle fuel chamber, having a second nozzle needle moveably guided in a second needle guide, a second needle fuel chamber interacting with the second nozzle needle for a second liquid fuel, coupled via second channels to the combustion chamber. The second channels are connected via second inner openings to the second needle fuel chamber. The first inner openings are arranged on a first circular contour and the second inner openings on a second circular contour extending concentrically about the first circular contour.
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2.发明授权公开(公告)号：US12078136B2
公开(公告)日：2024-09-03
申请号：US17749904
申请日：2022-05-20
申请人： Caterpillar Inc.
CPC分类号： F02M47/02 , F02M61/10 , F02M61/1806 , F02M61/1853 , F02M61/1886
摘要： A fuel injector includes a nozzle needle movable within an injector housing and including a flow guiding tip. The flow guiding tip includes an outer ramp surface, defining, in profile, a concave curve and a fuel trajectory line tangent to the concave curve and extending through a spray orifice inlet to direct fuel into the same. Related methodology is also disclosed.
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公开(公告)号：US20240175416A1
公开(公告)日：2024-05-30
申请号：US18515224
申请日：2023-11-20
CPC分类号： F02M61/1873 , F02M61/10
摘要： A fuel injector includes a nozzle body, at least one injection orifice formed through an injection end of the nozzle body, and a tubular valve disposed in a bore of the nozzle body that moves between open and closed positions. Apertures formed through a wall of the tubular valve permit fuel to flow freely between opposite ends and along an inner surface of the valve, regardless of any limitations imposed by an annular gap between the valve and nozzle body. The injector provides exceptionally high fuel flow rates without increasing valve lift or injection orifice size over conventional diesel fuel injectors, making it ideal for synthetic fuels such as DME.
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公开(公告)号：US20240125294A1
公开(公告)日：2024-04-18
申请号：US18452041
申请日：2023-08-18
申请人： Robert Bosch GmbH
发明人： Andreas Luckert , Andreas Glaser , Hikmet Yanmaz
CPC分类号： F02M61/205 , F02M51/0603 , F02M61/10
摘要： A fuel injection valve for fuel injection systems of internal combustion engines, in particular for directly injecting fuel into the combustion chamber of an internal combustion engine. The fuel injection valve includes a solenoid, an armature acted upon in a closing direction by a return spring through the solenoid, and a valve needle connected to the armature in force-locking fashion for actuating a valve closing body, which together with a valve seat surface forms a sealing seat. An adjustment element for adjusting the spring force of a return spring is arranged in a connecting sleeve serving the inlet side fuel supply. The adjustment element is bounded outwardly by a thin-walled sleeve. The sleeve includes an axially aligned sleeve jacket and a radially extending sleeve base. The wall thickness of the sleeve base is reinforced relative to the wall thickness of the sleeve jacket of the sleeve.
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公开(公告)号：US20240077050A1
公开(公告)日：2024-03-07
申请号：US18307858
申请日：2023-04-27
发明人： Sachio MORI
CPC分类号： F02M21/0257 , F02M61/10
摘要： A fuel injection device includes a fuel injection valve at a position corresponding to a portion between intake ports in an internal combustion engine. The fuel injection valve includes a body and a needle inside the body. The fuel injection valve is disposed closer to a piston of the internal combustion engine than the intake ports are to the piston. A single fuel injection passage for conducting gaseous fuel is present between a valve seat of the fuel injection valve and a combustion chamber of the internal combustion engine. The flow cross section of the gaseous fuel in the fuel injection passage is larger on a side closer to the piston of the internal combustion engine than on a side closer to an ignition plug of the internal combustion engine over a specified length in an extending direction of the fuel injection passage.
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公开(公告)号：US20230332568A1
公开(公告)日：2023-10-19
申请号：US18044063
申请日：2021-09-09
申请人： Robert Bosch GmbH
发明人： David Pfefferle , Egon Stratmann , Marcus Poindl , Ralf Kromer
CPC分类号： F02M51/061 , F02M61/10 , F02M61/1886 , F02M2200/9015
摘要： A fuel injection valve. The fuel injection valve has a support ring is provided on an inlet connection, which engages under the sealing ring on the inlet side. A plastic overmolding forms at least part of a valve housing. The support ring engaging under the sealing ring is positioned on the fuel injection valve in such a way that it rests directly on an upper end face of the plastic overmolding facing the sealing ring, so that the axial support of the sealing ring is provided indirectly via the plastic overmolding. The fuel injection valve is suitable, in particular, for the direct injection of fuel into a combustion chamber of a mixture-compressing external spark-ignition combustion engine.
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公开(公告)号：US20230296070A1
公开(公告)日：2023-09-21
申请号：US17655499
申请日：2022-03-18
申请人： Caterpillar Inc.
发明人： Andrew O. MARRACK
CPC分类号： F02M47/027 , F02M61/10 , F02D41/40
摘要： A fuel injection system includes a fuel supply passage configured to receive a pressurized fuel, a nozzle orifice downstream of the fuel supply passage, and an injection valve positionable to open the nozzle orifice and to close the nozzle orifice. The injection valve has a first configuration with a first lift and a second configuration with a second lift, the first lift being different than the second lift. The fuel injection system includes a fluid-actuated lift control valve configured to cause the injection valve to change from the first configuration to the second configuration.
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公开(公告)号：US20190203658A1
公开(公告)日：2019-07-04
申请号：US16022559
申请日：2018-06-28
发明人： Kyle Pohlkamp , Eric Kurtz
CPC分类号： F02D41/402 , F02D28/00 , F02D2041/389 , F02M51/0603 , F02M61/10
摘要： Methods and systems for operating a direct fuel injector of an internal combustion engine are described. In one example, a nozzle needle is moved in two directions to maintain fuel flow through the direct fuel injector and to reduce the possibility of the nozzle needle impacting a piezoelectric actuator. The method and system may permit long fuel injection times without causing undesirable impacts between components of a fuel injector.
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公开(公告)号：US20180313316A1
公开(公告)日：2018-11-01
申请号：US15770394
申请日：2016-10-18
发明人： Thierry THIBAULT , Nicolas RODIER
CPC分类号： F02M61/10 , F02M51/066 , F02M55/002 , F02M61/16 , F02M2200/50
摘要： A mobile valve member designed to be arranged in the nozzle body of a fuel injector, extends along a main axis and includes a piston formed of a first male cylinder of effective diameter forming the top end of the mobile member and of a second cylinder provided with an internal cylindrical bore of the effective diameter and a shutoff member including a male cylindrical shaft of the effective diameter that fits slidingly in the internal bore, and of a member extending as far as a pointed end provided with a mobile seat and forming the bottom end of the mobile member. The mobile member is hydraulically balanced and the length between the top end and the bottom end thereof is variable as a result of the sliding of the cylindrical shaft in the internal bore of the piston.
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公开(公告)号：US20180306156A1
公开(公告)日：2018-10-25
申请号：US15766280
申请日：2016-08-29
发明人： Christoph Hamann , Matteo Soriani
CPC分类号： F02M61/205 , F02M61/10 , F02M61/168 , F02M61/20 , F02M2200/50 , F02M2200/505 , F02M2200/8061
摘要： The present disclosure relates to fluid injection valves. Various embodiments may include a valve assembly for a fluid injection valve and a fluid injection valve including: a valve body with a longitudinal axis; a valve needle; and a preloaded calibration spring for biasing the valve needle. The calibration spring is preloaded by press-fitting a fixing region of the calibration spring with a fixing element, wherein the fixing region of the calibration spring extends from the upper part. The calibration spring comprises an adjustment cap arranged around the upper part of the spring element and press-fitted with the fixing element. A circumferential side wall of the adjustment cap provides the fixing region.
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