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公开(公告)号：US20240159208A1
公开(公告)日：2024-05-16
申请号：US18280490
申请日：2022-02-02
Applicant: Hitachi Astemo, Ltd.
Inventor： Takafumi ITO , Kiyotaka OGURA , Masashi NEMOTO , Kenichiro TOKUO
CPC classification number: F02M59/366 , F02M59/44
Abstract: The present invention suppresses wear of a rod or a component with which the rod is in contact. An electromagnetic suction valve mechanism (electromagnetic valve mechanism) includes a suction valve (valve body), a rod engaged with the suction valve, and a magnetic attraction force generation unit that generates a magnetic attraction force for moving the rod in an axial direction. The rod is provided with a low friction portion. The low friction portion is set to a friction coefficient such that a frictional force generated between the rod and the rod contact component with which the rod is in contact is smaller than a rotational propulsive force of the rod.
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公开(公告)号：US20190085805A1
公开(公告)日：2019-03-21
申请号：US15709758
申请日：2017-09-20
Applicant: Stanadyne LLC
Inventor： Richard Paulo Pellini
CPC classification number: F02M59/366 , F02M59/466 , F02M63/0265 , F02M2200/50 , F04B1/0452 , F04B1/053 , F04B7/0076 , F04B9/042 , F16K31/0613
Abstract: An energize-to-close solenoid operated spool type inlet control valve for a high pressure fuel pump is variably positionable relative to a sleeve having three inlet feed ports and the inlet check valve member, to implement three stages of pump operation: limp-home, low-pressure flow from the low-pressure feed pump to the common rail, no flow to the common rail, and metered quantity of flow to the common rail. The spool valve includes an axially extending internal passage fluidly connected to a fluid volume at the front end of the spool valve, and a control port at the back end of the spool valve, selectively alignable to fluidly connect the ports. Two springs of different lengths either alone or together, bias the spool valve toward opening of the inlet check valve.
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公开(公告)号：US09874185B2
公开(公告)日：2018-01-23
申请号：US14284220
申请日：2014-05-21
Applicant: Ford Global Technologies, LLC
Inventor： Ross Dykstra Pursifull , Mark Meinhart
CPC classification number: F02M59/20 , F02D41/009 , F02D41/20 , F02D41/3845 , F02D2041/2027 , F02D2250/31 , F02M59/366
Abstract: Methods are provided for controlling a solenoid spill valve of a direct injection fuel pump, wherein the solenoid spill valve is energized and de-energized according to certain conditions. A control strategy is needed to operate the direct injection fuel pump when small fractional trapping volumes are commanded, wherein a small amount of fuel is compressed and sent to the direct injection fuel rail. To maintain reliable and repeatable solenoid spill valve behavior for small fractional trapping volumes, methods are proposed that involve energizing the solenoid spill valve for a minimum angular duration below a trapping volume fraction threshold.
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公开(公告)号：US20180010562A1
公开(公告)日：2018-01-11
申请号：US15544039
申请日：2016-01-13
Applicant: DENSO CORPORATION
Inventor： Shinobu OIKAWA , Masaharu NAKAOKA
CPC classification number: F02M59/365 , F02M59/102 , F02M59/22 , F02M59/36 , F02M59/366 , F02M59/44 , F02M59/442 , F02M59/447 , F02M59/466 , F02M59/48 , F04B1/0456
Abstract: A plunger of a high-pressure pump is provided reciprocatably on an inner side of a cylinder. A holder disposed on an opposite side of the cylinder from a pressurizing chamber includes a large tubular portion that provides a predetermined space between the large tubular portion and an outer wall of the plunger, and a small tubular portion that is disposed on an opposite side of the large tubular portion from the cylinder. A pin inserted into a hole of the plunger at a position corresponding to the large tubular portion protrudes radially outward from the outer wall of the plunger and is accommodated in a space on an inner side of the large tubular portion.
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公开(公告)号：US20170328293A1
公开(公告)日：2017-11-16
申请号：US15528268
申请日：2015-11-19
Applicant: HONDA MOTOR CO., LTD.
Inventor： Tatsuo Yamanaka
CPC classification number: F02D41/20 , B60L11/00 , F02D41/062 , F02D41/22 , F02D41/3082 , F02D41/401 , F02D2041/2006 , F02D2041/201 , F02D2041/2089 , F02D2041/226 , F02M59/366 , F04B1/0452 , F04B1/053 , F04B7/0076 , F04B9/042 , F04B49/00 , F04B49/065 , F04B49/22 , F04B2201/1208 , F04C2210/203 , H02M1/32 , H02M3/156
Abstract: A control device for a fuel injection system includes a CPU which generates a drive signal for instructing execution of compression by a feel pump; a fuel pump drive circuit which controls application of electric power to a solenoid of the feel pump based on the drive signal; a boost circuit provided with a capacitor for storing electric power to be used for driving an injector; a charging circuit which leads a current generated when the application of electric power to the solenoid is stopped to the capacitor; and an excess electric power consumption circuit which consumes excess electric power of the capacitor. While feel injection from the injector is stopped, the CPU counts the number of times the feel pump is driven and turns off the drive signal so as to stop driving the feel pump as soon as the drive count has exceeded a predetermined count value.
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Patent Agency Ranking
公开(公告)号：US20170306905A1
公开(公告)日：2017-10-26
申请号：US15515910
申请日：2015-09-04
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Satoshi USUI , Minoru HASHIDA , Masayuki SUGANAMI , Hiroyuki YAMADA , Atsushi HOHKITA
IPC: F02M37/00 , F02M59/44 , F04B49/22 , F02M55/04 , F04B49/24 , F02M59/36 , F16K31/06 , F04B11/00 , F02M63/02
CPC classification number: F02M37/0041 , F02M37/00 , F02M55/04 , F02M59/027 , F02M59/102 , F02M59/36 , F02M59/366 , F02M59/44 , F02M59/442 , F02M59/46 , F02M59/464 , F02M59/466 , F02M63/0225 , F02M2200/09 , F02M2200/315 , F04B11/0033 , F04B49/225 , F04B49/243 , F16K31/06
Abstract: An object of the present invention is to obtain a high pressure fuel supply pump capable of reducing pressure pulsation that occurs in a low pressure pipe, preventing damage to the low pressure pipe, or reducing noise due to vibrations of the low pressure pipe. The present invention provides a high pressure fuel supply pump of a type in which, from a fuel suction port connected to a low pressure pipe provided upstream of a fuel, a low pressure passage, an electromagnetic suction valve driven by an electromagnetic force, a pressurizing chamber in which the volume thereof is increased or reduced by a plunger that is reciprocatingly moved by being guided by a cylinder, and a discharge valve provided at an outlet of the pressurizing chamber are sequentially arranged, a fuel is sucked to the pressurizing chamber through the electromagnetic suction valve, the amount of a part of the fuel, which is sucked to the pressurizing chamber, to be returned to the low pressure passage side is adjusted so that the amount of the fuel to be discharged through the discharge valve is controlled, and the high pressure fuel supply pump includes a backflow suppression mechanism for suppressing backflow of fuel from the fuel from the fuel suction portion to the low pressure pipe side.
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公开(公告)号：US20170298883A1
公开(公告)日：2017-10-19
申请号：US15097644
申请日：2016-04-13
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Azeem Sarwar , Chaitanya Sankavaram , Rafat Hattar , Matthew Hamilton , Jonathan Pung
CPC classification number: F02M59/368 , F02D41/1401 , F02D41/3845 , F02D2041/1412 , F02D2041/1422 , F02D2041/224 , F02D2041/228 , F02M59/366 , F02M59/367 , F02M59/464 , F02M59/466
Abstract: An engine fuel delivery system includes a fuel pump having a pumping chamber to increase fuel pressure and a closeable inlet valve, and a fuel rail to communicate pressurized fuel received from the fuel pump to at least one engine cylinder. The engine fuel delivery system also includes a controller programmed to issue a control signal to periodically close the inlet valve to generate a setpoint fuel pressure within the pumping chamber. The controller is also programmed to adjust a control signal gain value in response to deviation in an outlet fuel pressure relative to the setpoint fuel pressure. The controller is further programmed to issue a warning message in response to the control signal gain being adjusted by more than a predetermined threshold from a calibrated gain value.
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公开(公告)号：US09790908B2
公开(公告)日：2017-10-17
申请号：US14894700
申请日：2014-05-29
Applicant: ISUZU MOTORS LIMITED
Inventor： Takahiro Nagasaki , Kazuyoshi Narita , Kenta Suzuki
CPC classification number: F02M63/0285 , F02D41/266 , F02D41/3845 , F02D41/3863 , F02M51/061 , F02M59/366 , F02M63/0225
Abstract: A common rail fuel injection device includes first and second flow rate regulating valves for regulating a delivery volume of a pressurized fuel feed pump that feeds pressurized fuel to a common rail, a pressure reducing valve for reducing a common rail pressure, and a control device. The control device for the common rail fuel injection device includes a first drive controlling unit that controls a first electromagnetic driving unit for the second flow rate regulating valve and a second electromagnetic driving unit for the pressure reducing valve, and a second drive controlling unit that controls a third electromagnetic driving unit for the first flow rate regulating valve. The first drive controlling unit prohibits a drive instruction from being sent to the second flow rate regulating valve when the first drive controlling unit sends a drive instruction to the pressure reducing valve.
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公开(公告)号：US20170292468A1
公开(公告)日：2017-10-12
申请号：US15481128
申请日：2017-04-06
Applicant: MOTONIC CORPORATION
Inventor： Sang Ryul LEE , Wan Jae JEON , Jun Hyeok LEE , Hyung Soo KIM , Hae Jin KIM , Kyu Sung CHOI , Yeong Dong PARK
CPC classification number: F02D41/3005 , F02D41/20 , F02D41/3845 , F02D2041/2003 , F02D2041/2027 , F02D2041/2037 , F02D2200/0602 , F02D2200/101 , F02M59/102 , F02M59/366 , F02M59/466 , F02M65/003
Abstract: An apparatus and a method for controlling a flow control valve for a high-pressure fuel pump include: a pressure sensor for fuel in a delivery pipe; a control unit for controlling an operation of a flow control valve by controlling a current applied to a coil; a power switching unit for supplying or blocking driving power supplied to the flow control valve based on a control signal of the control unit; and a current adjustment unit electrically connected/disconnected with the flow control valve by the power switching unit to reduce a current supplied to the flow control valve when the current adjustment unit is connected with the flow control valve. Therefore, a noise and a vibration by collision between the plunger and the core upon closing the flow control valve may be attenuated by adjusting a current amount applied to the coil.
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公开(公告)号：US20170284389A1
公开(公告)日：2017-10-05
申请号：US15510387
申请日：2015-09-01
Applicant: DENSO CORPORATION
Inventor： Hiroyuki FUKUDA
CPC classification number: F04B49/22 , F02D41/3845 , F02D2041/2027 , F02D2041/2037 , F02D2041/2048 , F02D2041/2058 , F02D2200/0602 , F02M59/025 , F02M59/366 , F02M59/368 , F02M59/466 , F04B19/22 , F04B53/001 , F04B53/14 , F04B53/16
Abstract: A control device includes a plurality of sound reducing parts that is operated individually, when a predetermined condition for operation is met, at each of a plurality of timings when an operating sound is generated as a result of a movement of a valve body, in one open-and-close period, and that reduces the operating sound, at each of the plurality of the timings, by changing a period of energizing an electromagnetic part to an increase side relative to a normal time, an upper limit determination part that determines whether a required period of energizing the electromagnetic part in the one open-and-close period exceeds a predetermined upper limit value, when all the plurality of the sound reducing parts are operated, and a selectively operating part that selects and operates one or more of the plurality of the sound reducing parts to an extent that the required period of energizing does not exceed the upper limit value, when the upper limit determination part has determined that the required period of energizing exceeds the upper limit value.
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