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公开(公告)号：US10655580B2
公开(公告)日：2020-05-19
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 , F02M59/46 , F02M59/02 , F02M59/36 , F02M59/10 , F02M55/04 , F02M59/44 , F04B49/22 , F04B49/24 , F16K31/06 , F02M63/02 , F04B11/00
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：US10337480B2
公开(公告)日：2019-07-02
申请号：US15580480
申请日：2016-08-01
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Kenichiro Tokuo , Ryo Kusakabe , Shunsuke Aritomi , Satoshi Usui , Masayuki Suganami , Minoru Hashida , Masamichi Yagai , Yuta Saso , Atsuji Saito
Abstract: Provided is a high-pressure fuel pump in which responsiveness of closing a suction valve can be maintained even when the high-pressure fuel pump is increased in pressure or capacity of the high-pressure fuel pump is increased, thereby ensuring discharge efficiency. Therefore, the high-pressure fuel pump includes the rod that urges the suction valve in the valve opening direction, the mover that drives the rod in the valve closing direction, and the solenoid that generates a magnetic attraction force for moving the mover in the valve closing direction. After the suction valve starts moving from the suction valve closing position in the valve opening direction, the rod reaches the suction valve closing position and further moves in the valve opening direction.
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公开(公告)号：US10294907B2
公开(公告)日：2019-05-21
申请号：US15506040
申请日：2015-06-29
Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
Inventor： Minoru Hashida , Hiroyuki Yamada , Satoshi Usui , Kenichirou Tokuo , Masayuki Suganami , Atsushi Hohkita , Masamichi Yagai
Abstract: A high pressure fuel supply pump includes: an electromagnetic suction valve that adjusts an amount of fuel sucked into a pressuring chamber; a discharge valve that discharges the fuel from the pressuring chamber; and a plunger that makes a reciprocating motion in the pressuring chamber. The electromagnetic suction valve includes an electromagnetic coil, a suction valve, and a movable portion that is able to close the suction valve by a magnetic force when the electromagnetic coil is energized. The movable portion includes an anchor that is driven to close the suction valve by the magnetic force and stops at a fixed member, and a rod that is driven with the anchor and is able to move even after the anchor stops. The electromagnetic suction valve includes a first and second springs that bias the suction valve in closed and open direction, respectively, and a third spring in the rod.
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公开(公告)号：US10584668B2
公开(公告)日：2020-03-10
申请号：US15575578
申请日：2016-07-25
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Satoshi Usui , Atsushi Hohkita , Masayuki Suganami , Kenichiro Tokuo , Minoru Hashida , Masamichi Yagai , Yuta Saso , Kazuaki Tokumaru , Atsuji Saito
Abstract: Provide is a high-pressure fuel pump capable of improving the degree of freedom of layout of members to be attached to a pump body and a producing method thereof. Therefore, the high-pressure fuel pump includes the suction joint that sucks fuel, the pump body formed with the pressurizing chamber that pressurizes the fuel sucked from the suction joint, and the discharge joint that discharges the fuel pressurized in the pressurizing chamber. The pump body is formed so that at least a part of the side surface portion thereof becomes a cylindrical portion or a polygonal shape portion. At least one of the discharge joint and the suction joint may be fixed on the inner peripheral side with respect to the outermost peripheral portion of the cylindrical portion or the polygonal shape portion of the side surface portion.
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公开(公告)号：US10107285B2
公开(公告)日：2018-10-23
申请号：US15617766
申请日：2017-06-08
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Satoshi Usui , Shingo Tamura , Katsumi Miyazaki , Sunao Takahashi , Masayuki Suganami , Minoru Hashida
IPC: F04B53/16 , F04B53/14 , F02M55/04 , F02M59/48 , F02M59/44 , F04B35/01 , F04B9/04 , F04B11/00 , F02M37/00
Abstract: A mechanism for reducing pressure pulsation includes a pair of metal dampers formed by joining two disk-shaped metal diaphragms over an entire circumference and forming a hermetically sealed space inside a joined portion. Gas is sealed in the aforementioned hermetically sealed space of the damper, and a pair of pressing members give pressing forces to both outer surfaces of the aforementioned metal dampers at a position at an inner diameter side from the joined portion. The mechanism is unitized, with the pair of pressing members being connected in a state in which they sandwich the metal damper.
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Patent Agency Ranking
6.发明申请HIGH-PRESSURE FUEL SUPPLY PUMP HAVING AN ELECTROMAGNETICALLY-DRIVEN INLET VALVE 审中-公开具有电磁式入口阀的高压燃油泵公开(公告)号：US20150017039A1
公开(公告)日：2015-01-15
申请号：US14374840
申请日：2013-01-15
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Satoshi Usui , Tatsuo Kawano , Hiroyuki Yamada , Katsumi Miyazaki , Kenta Iwakura , Minoru Hashida
CPC classification number: F02M51/04 , F02M59/44 , F02M59/466 , F04B1/0439 , F04B1/0456 , F04B7/0076 , F04B53/1082
Abstract: A high-pressure fuel supply pump having a normally-closed type electromagnetically-driven inlet valve mechanism supporting a large capacity and causing least sound is provided. A valve member having a seat surface that comes into abutment with an inlet valve seat; and a plunger rod positioned on the seat surface side of the valve member and configured to operate the valve member by a magnetic attraction force are provided, and a protector configured to face a surface of the valve member on the surface opposite to the seat surface with a gap therebetween when the plunger rod makes a full stroke in the valve-open direction of the valve member and an anchor for driving the plunger rod comes into contact with a stopper is provided.
Abstract translation: 提供了一种具有常闭型电磁驱动入口阀机构的高压燃料供给泵，其支撑大容量并且产生最小的声音。 具有与入口阀座抵接的座面的阀构件; 并且设置有位于所述阀构件的所述座表面侧并且被构造成通过磁吸引力来操作所述阀构件的柱塞杆，以及保护器，其构造成在所述阀构件的与所述座表面相对的表面上面对， 当柱塞杆在阀构件的阀打开方向上的全行程和用于驱动柱塞杆的锚固件与止动件接触时，其间的间隙被设置。
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公开(公告)号：US11047380B2
公开(公告)日：2021-06-29
申请号：US16126774
申请日：2018-09-10
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Satoshi Usui , Shingo Tamura , Katsumi Miyazaki , Sunao Takahashi , Masayuki Suganami , Minoru Hashida
Abstract: A high pressure fuel pump includes a pump housing, pressure and damper chambers, a metal diaphragm, a press-fitted portion, and a weld portion. The pressure chamber is provided in the pump housing. The damper chamber is formed by the pump housing and a damper cover. The metal diaphragm damper is arranged in the damper chamber. At the press-fitted portion, an annular surface of the damper cover is press fitted to an annular surface of the pump housing. The weld portion fixes the damper cover to the pump housing at an entire circumference of the press-fitted portion.
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公开(公告)号：US11002236B2
公开(公告)日：2021-05-11
申请号：US16342278
申请日：2017-10-26
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Atsuji Saito , Satoshi Usui , Minoru Hashida , Masayuki Suganami , Hiroyuki Yamada , Kenichiro Tokuo , Masamichi Yagai , Yuta Saso
Abstract: An object of the present invention is to supply a high-pressure fuel supply pump capable of holding a spring holding member while reducing the height of the pump body.
A high-pressure fuel supply pump is provided with a pump body for forming a pressurizing chamber at an inner wall portion, and a flange portion for fixing the pump body to a high-pressure fuel supply pump mounting portion. The high-pressure fuel supply pump is provided with a cylinder and a spring holding member. The cylinder is inserted into a hole portion of the pump body from a lower side and in which the pressurizing chamber is formed further above an uppermost end surface. The spring holding member has an outer peripheral portion press-fitted and fixed to the pump body and a holding portion holding a spring portion for biasing the pump body between the outer peripheral portion and the inner peripheral portion. A spring-side lowest end portion of the holding surface of the spring holding member is disposed above the lowermost end portion of the flange portion.-
公开(公告)号：US09709055B2
公开(公告)日：2017-07-18
申请号：US14497755
申请日：2014-09-26
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Satoshi Usui , Shingo Tamura , Katsumi Miyazaki , Sunao Takahashi , Masayuki Suganami , Minoru Hashida
IPC: F04B53/16 , F04B53/14 , F04B35/01 , F04B9/04 , F04B11/00 , F02M55/04 , F02M59/44 , F02M59/48 , F02M37/00
CPC classification number: F04B53/143 , F02M37/0041 , F02M55/04 , F02M59/442 , F02M59/48 , F04B9/042 , F04B11/0008 , F04B35/01
Abstract: A mechanism for reducing pressure pulsation includes a pair of metal dampers formed by joining two disk-shaped metal diaphragms over an entire circumference and forming a hermetically sealed space inside a joined portion. Gas is sealed in the aforementioned hermetically sealed space of the damper, and a pair of pressing members give pressing forces to both outer surfaces of the aforementioned metal dampers at a position at an inner diameter side from the joined portion. The mechanism is unitized, with the pair of pressing members being connected in a state in which they sandwich the metal damper.
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公开(公告)号：US10788003B2
公开(公告)日：2020-09-29
申请号：US16091160
申请日：2017-03-10
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Minoru Hashida , Atsushi Hohkita , Masayuki Suganami , Satoshi Usui , Masaru Kawai , Arata Kagiyama
IPC: F02M61/16 , F02M59/36 , F02M59/46 , F02M59/48 , F02M59/44 , F02D41/38 , F02M57/02 , C21D9/00 , F02M63/02
Abstract: It is an object of the present invention to provide a high-pressure fuel supply pump having a pump body capable of improving corrosion resistance and weldability and being manufacturable by forging. Therefore, in the high-pressure fuel supply pump having a metal pump body forming a pressurizing chamber, the pump body is made of a steel material containing 12% to 18% of Cr and 3% to 7% of Ni, and the pump body has a forging surface on a part of the outer peripheral surface.
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