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公开(公告)号：US20200284229A1
公开(公告)日：2020-09-10
申请号：US16763634
申请日：2018-11-08
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Masashi NEMOTO , Satoshi USUI , Hiroyuki YAMADA
Abstract: To provide a high-pressure fuel supply pump having a relief valve mechanism capable of suppressing deterioration of the seat property due to the influence of deformation caused by press-fitting while press-fitting and fixing a relief seat. To achieve this, a relief seat 201 of a relief valve mechanism 200 has, on its inner peripheral side, a seat portion 201a on which a valve 202 is seated, a small-diameter channel portion 201b formed with a smaller diameter than the valve 202 on an upstream side of the seat portion 201a, and a large-diameter channel portion 201c formed with a larger diameter than the small-diameter channel portion 201b on an upstream side of the small-diameter channel portion 201b, and, on its outer peripheral side, a fine gap portion 201d formed between the relief seat 201 and a member arranged on an outer peripheral side of the relief seat 201 at a position overlapping the small-diameter channel portion 201b in a flow direction of the fuel, and a press-fit portion 205a coming into contact with the member when the relief seat 201 is press-fitted into the member at a position overlapping the large-diameter channel portion 201c in the flow direction of the fuel.
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公开(公告)号：US20190128229A1
公开(公告)日：2019-05-02
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
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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公开(公告)号：US20180363590A1
公开(公告)日：2018-12-20
申请号：US16111619
申请日：2018-08-24
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Masahiko HAYATANI , Satoshi USUI , Hideki MACHIMURA , Tatsuo KAWANO , Syunsuke ARITOMI , Shingo TAMURA
Abstract: A high-pressure fuel supply pump including an electromagnetically driven intake valve is configured such that a pressure equalizing hole is provided in the valve stopper positioned between the valve and a pressurizing chamber. The pressure equalization hole connects a spring storage space, provided between a valve and a valve stopper, with a surrounding fluid passage. The high-pressure fuel supply pump is further configured such that an opening of the pressure equalizing hole at the spring storage chamber side is open at a position at the inner side of a diameter of the spring. Since the pressure in the pressurizing chamber can be introduced into the inner side of the spring without traversing the spring, the unstable behavior of the spring or the valve due to the introduced pressure eliminated. Since the force applied to the valve when the valve closes is stabilized, the closing timing of the valve is stable.
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公开(公告)号：US20180163683A1
公开(公告)日：2018-06-14
申请号：US15893012
申请日：2018-02-09
Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
Inventor： Tatsuo KAWANO , Kenichiro TOKUO , Satoshi USUI , Hiroyuki YAMADA , Katsumi MIYAZAKI
IPC: F02M59/46 , F16K31/06 , F04B53/10 , F02M59/36 , F04B49/24 , F04B7/00 , F02M63/00 , F02M59/48 , F02M59/02 , F02M37/00
CPC classification number: F02M59/466 , F02M37/0023 , F02M59/025 , F02M59/366 , F02M59/368 , F02M59/462 , F02M59/485 , F02M63/0017 , F02M63/0021 , F02M63/0075 , F02M2200/09 , F02M2200/502 , F04B7/0003 , F04B49/243 , F04B53/10 , F04B53/1082 , F16K31/0696
Abstract: To reduce collision noise created by the operation of an electromagnetic suction valve provided on a high pressure fuel supply pump. In the present invention, in order to achieve the above object, the mass of a member which collides by magnetic attractive force is reduced to reduce the noise to be generated. The thus configured present invention provides the following advantageous effects. The noise generated when a core and an anchor collide with each other by magnetic attractive force depends on the magnitude of the kinetic energy of a moving element. The kinetic energy to be consumed in the collision is only the kinetic energy of the anchor. The kinetic energy of a rod, being absorbed by a spring, does not contribute to the noise; thus, the energy when the anchor and the core collide with each other can be reduced, whereby the noise to be created can be reduced.
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公开(公告)号：US20160312775A1
公开(公告)日：2016-10-27
申请号：US15105973
申请日：2014-11-17
Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
Inventor： Yuta SASO , Atsuji SAITO , Satoshi USUI , Shingo TAMURA , Moritsugu AKIYAMA , Hiroyuki YAMADA , Atsushi HOHKITA
CPC classification number: F02M59/447 , F02M59/025 , F02M59/368 , F02M59/44 , F02M59/46 , F02M59/462 , F02M59/48 , F02M2200/8061 , F04B49/24 , F04B53/16
Abstract: A high-pressure fuel supply pump in which a relief valve mechanism is not detached by a force generated by a differential pressure between an inlet side and an output side of a relief valve mechanism is obtained. According to the present invention, in order to obtain the high-pressure fuel supply pump, the relief valve mechanism of the high-pressure fuel supply pump is oriented from a downstream side of a discharge valve to an upstream side of the discharge valve, and the output side of the relief valve mechanism is inserted from the upstream side of the discharge valve into the pump housing, and the relief valve mechanism is fixed with press fitting. Therefore, a force exerted by the differential pressure between the inlet side pressure and the output side pressure of the relief valve mechanism is exerted in a direction in which the relief valve mechanism is inserted, so that the relief valve mechanism can be prevented from being detached.
Abstract translation: 获得了通过由安全阀机构的入口侧和输出侧之间的压差产生的力而不使卸压阀机构分离的高压燃料供给泵。 根据本发明，为了获得高压燃料供给泵，高压燃料供给泵的安全阀机构从排出阀的下游侧向排出阀的上游侧取向， 安全阀机构的输出侧从排出阀的上游侧插入泵壳体，并且安装阀机构用压配件固定。 因此，通过安全阀机构的入口侧压力和输出侧压力之间的压差施加的力沿安全阀机构插入的方向施加，使得可以防止安全阀机构脱离 。
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Patent Agency Ranking
公开(公告)号：US20200011314A1
公开(公告)日：2020-01-09
申请号：US16576000
申请日：2019-09-19
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Shingo TAMURA , Atsuji SAITO , Satoshi USUI , Masahiko HAYATANI
Abstract: A high pressure fuel pump according to the present invention includes a cylinder which is fitted in a concave portion formed in a pump housing and which defines a compression chamber of the pump and a plunger which pressurizes, by sliding against the cylinder, the fluid in the compression chamber. The high pressure fuel pump is structured such that the fluid sucked into the compression chamber by reciprocating motion of the plunger is pressurized and is then discharged from the compression chamber.The cylinder is formed of a cylindrical member which has a ceiling portion and in which the compression chamber is partitionedly formed. A fuel suction path formed in the pump housing reaches the compression chamber through the cylinder and a fuel discharge path formed in the pump housing is connected to the compression chamber through the cylinder. The cylinder is pressed, for sealed fixation, against the pump body by a fuel pressurizing force applied to the cylinder.Neither holder nor caulking is used for cylinder fixation.
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公开(公告)号：US20190301414A1
公开(公告)日：2019-10-03
申请号：US16304537
申请日：2017-04-11
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Satoshi USUI , Atsuji SAITO , Minoru HASHIDA , Masamichi YAGAI , Kenichiro TOKUO , Masayuki SUGANAMI , Masahiko HAYATANI , Hiroyuki YAMADA
Abstract: Provided is a high-pressure fuel supply pump capable of arranging a relief valve mechanism inside a pump body while suppressing an increase in size and an increase in manufacturing cost. Therefore, a high-pressure fuel supply pump of the present invention includes: a plunger that changes a volume of a pressurizing chamber by reciprocating an inside of a cylinder; a first hole formed from an outer circumferential surface of a pump body toward an inner circumferential side; a relief valve mechanism arranged in the first hole; and a second hole that returns fuel in a flow path on a discharge side of a discharge valve pressurized in the pressurizing chamber to a damper chamber or a plunger seal chamber communicating with the damper chamber when the relief valve mechanism opens in communication with the first hole. At least a part of the relief valve mechanism arranged in the first hole is arranged on the pressurizing chamber side with respect to the uppermost end portion on the pressurizing chamber side of the cylinder.
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公开(公告)号：US20180135581A1
公开(公告)日：2018-05-17
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：US20170037822A1
公开(公告)日：2017-02-09
申请号：US15304237
申请日：2015-04-17
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Masamichi YAGAI , Atsushi HOHKITA , Hiroyuki YAMADA , Masayuki SUGANAMI , Satoshi USUI , Atsuji SAITO , Kenichirou TOKUO , Yuta SASO
CPC classification number: F02M59/462 , F02M59/34 , F02M59/44 , F02M59/46 , F02M59/485 , F02M63/005 , F04B19/22
Abstract: To increase a valve-opening pressure at which a pressure relief valve is opened in order to deal with a higher pressure of the fuel, a large pressure relief valve is installed in a high-pressure fuel supply pump. This upsizes the high-pressure fuel supply pump. A pressure relief valve is installed in a discharge joint. This can provide a high-pressure fuel supply pump that is not large too much and sufficiently performs a relief function by efficiently using the excessive space in the pump even when the fuel pressure is increased.
Abstract translation: 为了提高打开压力以打开压力释放阀以便处理更高的燃料压力，在高压燃料供应泵中安装了大的压力释放阀。 这增加了高压燃油供应泵。 泄压阀安装在排放接头中。 即使在燃料压力增加的情况下，也能够通过有效地利用泵内的过多空间来提供不太大的高压燃料供给泵，并且能够充分地进行起动功能。
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公开(公告)号：US20190153974A1
公开(公告)日：2019-05-23
申请号：US16098396
申请日：2017-03-22
Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
Inventor： Osamu MUKAIHARA , Satoshi USUI , Masahiro TOYOHARA
CPC classification number: F02D41/401 , F01L1/356 , F01L13/00 , F02D13/02 , F02D13/0207 , F02D2200/025 , F02M59/44 , F02M63/00 , Y02T10/18
Abstract: Provided is a control device for an internal combustion engine capable of avoiding deterioration of combustion and reliably suppressing synthetic noise of a high pressure fuel pump and a fuel injection valve without affecting an operating state of the internal combustion engine. Therefore, when it is determined that there is synthetic noise of a high pressure fuel pump and a fuel injection valve, an operating angle of a variable valve mechanism provided in the internal combustion engine is made variable while satisfying a fuel injection request of the fuel injection valve.
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