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公开(公告)号：US10240566B2
公开(公告)日：2019-03-26
申请号：US15502649
申请日：2015-08-06
摘要： A throttle device for controlling a fuel quantity to be supplied to a fuel injection nozzle includes a control chamber and a supply device for supplying fuel to the control chamber. The supply device includes an inlet throttle having a length selected such that a fuel flowing through the inlet throttle, when in operation, flows through the inlet throttle in a turbulent flow. An injection device including the throttle device is also provided.
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公开(公告)号：US20190055896A1
公开(公告)日：2019-02-21
申请号：US15763209
申请日：2016-11-04
摘要： Disclosed is a fuel injection control device for an engine equipped with a solenoid-type fuel injector 67. The fuel injection control device comprises: a voltage sensor SW19 configured to detect a voltage of a solenoid of the fuel injector 67; and a PCM 10 configured to set a valve-open period of the fuel injector 67, based on a fuel injection amount according to an operation state of the engine 1, and control the fuel injector 67 based on the valve-open period. The PCM 10 is configured to perform correction for gradually shortening the set valve-open period, as the voltage (residual voltage) detected by the voltage sensor SW19 when opening the fuel injector becomes larger, and control the fuel injector 67 based on the corrected valve-open period.
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公开(公告)号：US20190010909A1
公开(公告)日：2019-01-10
申请号：US16024170
申请日：2018-06-29
发明人： James Fochtman , John Walters , Tyler Craven
摘要： A solenoid assembly of a fuel pump is disclosed, including a housing having an open end and a partly closed end; a pole piece fixedly disposed within the housing; a bobbin assembly disposed within the housing and including a coil disposed proximal to the pole piece; and a bobbin retainer disposed between the open end of the housing and the bobbin assembly, a radially outer surface of the bobbin retainer contacting the housing. A portion of the housing which is adjacent the bobbin retainer has an outer surface that is recessed and an inner surface that protrudes against the bobbin retainer. The portion is created by deforming the housing to create the protrusion on the inner surface of the housing. The housing inner surface protrusion provides a press fit engagement with the bobbin retainer.
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公开(公告)号：US20190010908A1
公开(公告)日：2019-01-10
申请号：US16132020
申请日：2018-09-14
发明人： George A. MEEK , Lukhbir PANESAR
CPC分类号： F02M61/12 , F02D19/0694 , F02D41/0025 , F02D41/0027 , F02M43/04 , F02M47/025 , F02M51/0653 , F02M51/0675 , F02M63/001 , F02M2200/16 , F02M2200/46 , F02M2200/50 , F02M2200/90 , F02M2547/006 , Y02T10/36
摘要： A fuel injector for an internal combustion engine is disclosed. The fuel injector is particularly suitable for use as a dual fuel injector, and comprises a generally tubular outer valve needle, an inner valve needle slidably received in the outer valve needle, and a nozzle body assembly comprising a tip part and a needle guide part. The tip part defines a seating region for the outer valve needle, and the needle guide part comprises a guide bore for slidably receiving the outer valve needle. In one embodiment, a lower bore region of the needle guide part defines a. cavity around the outer valve needle which houses a biasing spring for the outer valve needle and a fuel. A collar for seating the biasing spring can be dimensioned to allow free flow of the fuel from the cavity into an annular accumulator volume defined between the outer valve needle and the bore of the tip part.
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公开(公告)号：US10167834B2
公开(公告)日：2019-01-01
申请号：US15323337
申请日：2015-02-20
申请人： Robert Bosch GmbH
摘要： A high-pressure fuel pump which includes a discharge valve with a valve ball and a valve body, the valve body having a sealing section on which a sealing seat is present, and having a guide section in which the valve ball is guided. The guide section includes a first plurality of axially protruding webs between which first flow paths are formed, an opening which faces radially outwardly being present at least between two adjacent webs.
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公开(公告)号：US20180372048A1
公开(公告)日：2018-12-27
申请号：US15962210
申请日：2018-04-25
申请人： DENSO CORPORATION
发明人： Shuhei YAMAMOTO , Kazuhiro ONISHI
摘要： A high pressure fuel pump includes: a pump body that forms a suction passage and a pressurizing chamber and slidably supports a plunger; and a control valve that opens a connection between the suction passage and the pressurizing chamber in a suction stroke, during which the plunger is driven toward a suction side for suctioning fuel into the pressurizing chamber, while the control valve controls closing timing, at which the connection between the suction passage and the pressurizing chamber is closed by the control valve in a delivery stroke, during which the plunger is driven toward a delivery side for delivering the fuel out of the pressurizing chamber. The pump body forms a release passage that is communicated with the suction passage. The release passage relieves the fuel, which is pressurized by the plunger, from the pressurizing chamber before the closing timing during the delivery stroke.
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公开(公告)号：US20180363616A1
公开(公告)日：2018-12-20
申请号：US15622541
申请日：2017-06-14
申请人： CUMMINS INC.
IPC分类号： F02M63/00
摘要： A fuel injector device for injecting fuel into a combustion chamber of an internal combustion engine is provided. Included in the fuel injector is a body having a chamber and a pilot valve assembly including a seat retainer configured to be detachably insertable into the chamber of the body. A pilot valve seat is disposed in the seat retainer and substantially enclosed by the seat retainer. A stator assembly is disposed in the seat retainer and at least partially enclosed by the seat retainer. The pilot valve seat and the stator assembly in the pilot valve assembly are replaceable as a single unit of the pilot valve assembly for the fuel injector.
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公开(公告)号：US20180355817A1
公开(公告)日：2018-12-13
申请号：US15801159
申请日：2017-11-01
CPC分类号： F02D41/40 , F02D2041/3052 , F02D2200/0616 , F02D2200/063 , F02M57/005 , F02M61/161 , F02M63/0015 , F02M63/0028 , F02M63/0031 , F02M65/005 , F02M2200/24 , F02M2200/9038
摘要： A fuel injection system for fuel metering may include an injection nozzle, which includes a nozzle body, a nozzle needle, and a nozzle orifice, wherein nozzle needle is disposed in the nozzle body; a control piston configured to mechanically and electrically contact the nozzle needle in an axial direction opposite to the nozzle orifice; a transmitter configured to communicate with a controller and electrically contact the nozzle needle via the control piston; wherein the controller is configured to determine an open state and a closed state between the nozzle needle and the nozzle body via an electrical signal detected by the transmitter; and wherein the controller is configured to adjust the open state and the closed state in correlation with a fuel injection quantity.
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公开(公告)号：US10145345B2
公开(公告)日：2018-12-04
申请号：US15023329
申请日：2014-09-11
申请人： Robert Bosch GmbH
发明人： Andreas Dutt , Achim Koehler
摘要： The invention relates to a fluid conveyance system for a fluid, comprising a low-pressure conveyance system having a low-pressure pump (2) and a high-pressure conveyance system having a high-pressure pump (8), which are connected by means of a connecting line, wherein the fluid conveyance system has a pressure damper (19). According to the invention, a fluid conveyance system is provided, by means of which a pulsation of the fluid caused by flow-rate waves or pressure waves in the fluid is damped. This is achieved in that the pressure damper (19) is arranged in the lower-pressure conveyance system and is a hydraulic pressure damper (19). Said hydraulic damper (19) has a piston (21) arranged in a cylinder (20), which piston can be moved against the force of a compression spring (23) and the vapor pressure present in a compression-spring chamber (22) accommodating the compression spring.
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公开(公告)号：US20180334981A1
公开(公告)日：2018-11-22
申请号：US16047376
申请日：2018-07-27
CPC分类号： F02D41/3082 , F02D41/221 , F02D41/3845 , F02D41/3854 , F02D2041/1412 , F02D2041/2051 , F02D2200/0604 , F02M63/0054 , F02M69/465
摘要： Methods and systems are provided for operating a lift pump of an engine fuel system. In one example, a method may comprise predicting when a fuel rail pressure will decrease below a threshold assuming that a lift pump remains off. The method may further comprise powering on the lift pump before the fuel rail pressure decreases below to the threshold to prevent fuel rail pressure from decreasing below the threshold.
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