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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
申请人： Hitachi Astemo, Ltd.
发明人： Takafumi ITO , Kiyotaka OGURA , Masashi NEMOTO , Kenichiro TOKUO
CPC分类号： F02M59/366 , F02M59/44
摘要： 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：US20240133356A1
公开(公告)日：2024-04-25
申请号：US18278330
申请日：2022-03-11
发明人： Robert GRAUMÜLLER
CPC分类号： F02M63/0001 , F02M59/102 , F02M59/36
摘要： A lubricated high pressure fuel pump assembly is provided, comprising a fuel pump, a sealed enclosure and a pump lubrication circuit. The fuel pump includes a pump drive shaft via which the fuel pump is configured to be mechanically driven. The sealed enclosure is configured to surround a first portion of the pump drive shaft, wherein the first portion is exterior to the fuel pump. The pump lubrication circuit comprises a lubricant reservoir and a lubricant pump configured to pump lubricant from the lubricant reservoir to the pump drive shaft. The sealed enclosure is configured to prevent fluid leakage from the fuel pump via the first portion of the pump drive shaft and the lubricant reservoir is configured to collect the lubricant from the pump drive shaft, such that the lubricant is retained within the lubricated high pressure fuel pump assembly.
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公开(公告)号：US11525427B2
公开(公告)日：2022-12-13
申请号：US17246804
申请日：2021-05-03
申请人： DENSO CORPORATION
发明人： Shuhei Yamamoto , Kazuhiro Onishi
IPC分类号： F02M59/06 , F02M63/00 , F02M63/02 , F02M59/36 , F02M59/34 , F02M59/44 , F02M37/18 , F02M37/00
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：US11519372B2
公开(公告)日：2022-12-06
申请号：US17466991
申请日：2021-09-03
申请人： DENSO CORPORATION
发明人： Hisatoshi Shibuya
摘要： A metering valve supplies fuel to and block fuel from a pressurizing chamber by moving a valve body by switching between energization and de-energization of an electromagnetic unit. An energization control unit performs a valve closing control and a valve opening control to reduce operating sound in one opening and closing period in which the valve body opens and closes. A time control unit controls, on determination that the energizing period of the electromagnetic unit exceeds the upper limit value, a moving speed of the valve body when the valve body moves to a valve closing side, such that the energization period of the electromagnetic unit in the one opening and closing period does not exceed the upper limit value, thereby to cause the energization control unit to perform both the valve closing control and the valve opening control in the one opening and closing period.
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公开(公告)号：US11261988B2
公开(公告)日：2022-03-01
申请号：US16740827
申请日：2020-01-13
申请人： DENSO CORPORATION
发明人： Yuichi Miwa , Tetsuya Yoshimura
摘要： A solenoid valve includes an inner stator and an outer stator that are part of a magnetic circuit. An armature is attracted toward the inner stator when a coil is energized. A spring biases the armature in a direction away from the inner stator. A rod is integrally formed with the armature and integrally reciprocates with the armature. A guide guides reciprocation of the rod. A valve operates by following the rod to open and close a fuel/liquid passage. The spring and sliding portions between the rod and the guide are arranged within a recess portion formed in the inner stator and arranged in parallel to each other while overlapping in the axial direction.
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公开(公告)号：US11231032B2
公开(公告)日：2022-01-25
申请号：US16026916
申请日：2018-07-03
发明人： James Fochtman , John Walters , Tyler Craven , Joe Angelino
IPC分类号： F04B17/04 , F04B53/10 , F16K31/06 , F02M37/10 , H01F7/08 , H01F7/16 , F02M59/46 , F02M51/04 , F02M63/00 , F02M37/08 , F02M59/10 , F04B23/02 , F02M55/00 , F04B39/10 , F16K1/42 , F16K15/02 , F16K27/02 , F16K15/14 , F02M51/06 , F02M59/36 , B21D39/06 , F02M37/54 , F02M37/04
摘要： A fuel pump, is disclosed, including a power group having a housing, a coil, a pole piece and a movable armature; a valve group including a valve body, a plunger connected to the armature, a bushing in which the plunger is disposed, an inlet chamber, an outlet chamber, a pump chamber, an inlet valve disposed between the inlet chamber and the pump chamber and an outlet valve disposed between the pump chamber and the outlet valve; and an inlet filter coupled to a fluid inlet of the valve group. The inlet filter is disposed relative to the coil such that when the fuel pump is disposed within a fuel tank, a bottom of the inlet filter as oriented in the fuel tank is disposed above a fuel level in the fuel tank and the coil is at least partly submerged in the fuel.
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公开(公告)号：US11149865B2
公开(公告)日：2021-10-19
申请号：US16550373
申请日：2019-08-26
申请人： DENSO CORPORATION
发明人： Masaharu Nakaoka
摘要： A discharge valve includes: a valve main body that slidably contacts an inner peripheral wall of a tubular portion; and a primary passage that is formed at the valve main body and is located between the valve main body and the inner peripheral wall of the tubular portion. A stopper includes: a stopper main body that is formed separately from the tubular portion while the stopper main body is located on a side of the discharge valve that is opposite to the discharge valve seat; a movement limit surface that is configured to limit movement of the discharge valve in a direction away from the discharge valve seat; and a secondary passage that is formed at the stopper main body.
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公开(公告)号：US11098710B2
公开(公告)日：2021-08-24
申请号：US16390117
申请日：2019-04-22
申请人： Stanadyne LLC
发明人： Richard P Pellini , Kenneth R Morel , David G Palermo , Dominic M Myren , Yevgeniy Norkin , Michael Wegrzyniak
摘要： The disclosed inlet check valve is used in a high pressure fuel pump and is comprised of a valve member integrally connected to a valve stem which is coupled to an inlet valve armature. The valve member has a stroke along an axis between an open position and a closed position. An inlet valve solenoid generates a magnetic field in an inlet valve pole to attract the inlet valve armature and move the valve member from the open position to the closed position. In the open position, the valve member contacts an inlet valve stop and a gap greater than the stroke of the valve member is defined along the axis between the inlet valve armature and the inlet valve pole. In the closed position, an inlet valve seat mates with the valve member and an armature gap remains between the inlet valve armature and the inlet valve pole.
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公开(公告)号：US11047353B2
公开(公告)日：2021-06-29
申请号：US16769952
申请日：2018-11-20
发明人： Atsuji Saito , Satoshi Usui , Kazuaki Tokumaru
摘要： Provided is a high-pressure fuel supply pump capable of reducing a manufacturing cost of a part for holding a metal damper. The high-pressure fuel supply pump includes a pump body 1 having a pressurizing chamber 11 therein, a damper cover 14 forming a damper chamber 10 together with the pump body 1 on the upstream side of the pressurizing chamber 11, a metal damper 9 that is disposed in the damper cover 10 and formed by laminating two metal diaphragms, and a first holding member 9a that is disposed in the damper chamber 10 and presses and holds the metal damper 9 from one side. The first holding member 9a includes a first regulation portion that regulates the radial movement of the metal damper 9, and a second regulation portion that regulates the radial movement of the first holding member 9a in the damper chamber 10. At a position of the second regulation portion, a flow path is formed which allows the fuel in the damper chamber 10 to circulate to both surfaces of the metal damper 9.
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公开(公告)号：US11015558B2
公开(公告)日：2021-05-25
申请号：US16277492
申请日：2019-02-15
发明人： Robert B. Perry
摘要： A combination outlet valve and pressure relief valve includes an outer housing having a passage. An inner housing is located within the passage and includes a first bore extending thereinto from one end and a second bore extending thereinto from the other end such that the first bore and the second bore terminate at an inner housing wall. An outlet valve assembly is located within the first bore and includes an outlet valve member, an outlet valve seat, and an outlet valve spring grounded to the inner housing wall and biasing the outlet valve member toward the outlet valve seat. A pressure relief valve assembly is located within the second bore and includes a pressure relief valve member, a pressure relief valve seat, and a pressure relief valve spring grounded to the inner housing wall and biasing the pressure relief valve member toward the pressure relief valve seat.
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