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公开(公告)号：US20190309715A1
公开(公告)日：2019-10-10
申请号：US16449771
申请日：2019-06-24
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Yuta SASO , Atsuji SAITO , Satoshi USUI , Shingo TAMURA , Moritsugu AKIYAMA , Hiroyuki YAMADA , Atsushi HOHKITA
Abstract: A fuel pump includes an electromagnetically driven intake valve mechanism, a pump housing, a discharge valve, an opening, a seal member, and a first relief passage. The relief valve mechanism has a relief valve, a relief valve seat contacting the relief valve when the relief valve is closed and a relief spring biasing the relief valve against the relief valve seat. A second relief passage, communicating the first relief passage and a hole formed in the relief seat, is formed between the seal member and the relief valve seat. The relief valve seat, the relief valve, and the relief spring are arranged in this order beginning from the open end side.
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公开(公告)号：US20190136841A1
公开(公告)日：2019-05-09
申请号：US16238807
申请日：2019-01-03
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Shunsuke ARITOMI , Kenichirou TOKUO , Satoshi USUI , Shingo TAMURA
Abstract: A pump for supplying high-pressure includes a plunger, a cylinder, a body, and a holder. The uppermost end surface of the cylinder is an end of the cylinder that is closest to the pressurizing chamber. A first gap formed between the outer periphery of the cylinder and the body in the radial direction is smaller than a second gap formed in the radial direction between the inner diameter of the pressurizing chamber and the outer diameter of the plunger. A radial gap is formed in an entire area of the cylinder in an axial direction thereof.
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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：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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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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Patent Agency Ranking
公开(公告)号：US20210207567A1
公开(公告)日：2021-07-08
申请号：US16762792
申请日：2018-12-07
Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
Inventor： Shingo TAMURA , Kenichiro TOKUO , Masayuki SUGANAMI , Kazuaki TOKUMARU
Abstract: An object of the invention is to provide a fuel supply pump that improves the lubricity of a plunger that reciprocates on the inner circumference of a cylinder in order to suppress sticking of the plunger that may occur with increasing pressure of fuel. A fuel supply pump includes a plunger that reciprocates in an inner peripheral portion of a cylinder, and a pressurizing chamber that is pressurized by the plunger. An annular groove is formed on an outer periphery of the plunger. The annular groove is located closer to the pressurizing chamber than an axial center position of a cylinder sliding region at the bottom dead center position.
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公开(公告)号：US20190003475A1
公开(公告)日：2019-01-03
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：US20170276130A1
公开(公告)日：2017-09-28
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
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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9.发明申请公开(公告)号：US20150159611A1
公开(公告)日：2015-06-11
申请号：US14625798
申请日：2015-02-19
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Satoshi USUI , Kenichiro TOKUO , Tatsuo KAWANO , Masahiko HAYATANI , Shingo TAMURA , Hiroyuki YAMADA , Katsumi MIYAZAKI
CPC classification number: F02M59/366 , F02M37/0023 , F02M37/043 , F02M59/367 , F02M63/0017 , F02M63/0035 , F04B7/0076 , F04B53/10 , F04B53/1087 , Y10T137/86027
Abstract: Responsiveness is improved in valve opening and valve closing of an electromagnetically driven intake valve unit in which a valve is provided on a pressurizing chamber side of a valve seat. The valve includes an annular abutting surface that abuts the valve seat to shut off a fuel intake passage and a bottomed cylindrical part provided at an inner peripheral part of the annular abutting surface. The bottomed cylindrical part is inserted into a fuel introduction hole formed in the valve housing inside the valve seat, and the outer surface of an end part of the bottomed cylindrical part is exposed to fuel in a low pressure fuel chamber provided upstream of the fuel introduction hole.
Abstract translation: 在阀座的加压室侧设置有电磁驱动的进气阀单元的开阀和关闭阀的响应性提高。 阀包括邻接阀座的环形邻接表面以截断燃料进入通道和设置在环形邻接表面的内周部分处的有底圆柱形部分。 有底圆柱形部分插入形成在阀座内的阀壳体中的燃料引入孔中，底部圆柱形部分的端部的外表面暴露于设置在燃料导入件上游的低压燃料室中的燃料 孔。
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公开(公告)号：US20190017482A1
公开(公告)日：2019-01-17
申请号：US16102214
申请日：2018-08-13
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Satoshi USUI , Kenichiro TOKUO , Tatsuo KAWANO , Masahiko HAYATANI , Shingo TAMURA , Hiroyuki YAMADA , Katsumi MIYAZAKI
Abstract: A high-pressure fuel supply pump includes a pressurizing chamber, a piston plunger, and an electromagnetically-driven intake valve mechanism. The piston plunger reciprocates within the pressurizing chamber. The electromagnetically-driven intake valve mechanism is provided at an inlet of the pressurizing chamber. The electromagnetically-driven intake valve mechanism includes an anchor which pulls a plunger rod, a fixed core which attracts the anchor, and a yoke in which inner peripheral part has the fixed core and the anchor. The fixed core is fixed to a bottom part of the yoke. A through hole is formed at a bottom part of the fixed core.
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