公开(公告)号：US20170356412A1

公开(公告)日：2017-12-14

申请号：US15540740

申请日：2016-01-08

Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.

Inventor： Moritsugu AKIYAMA ,  Shigehiko OMATA ,  Shigenori TAHARA ,  Katsutoshi KOBAYASHI ,  Kenichirou TOKUO

IPC: F02M59/36 ,  F02M59/44 ,  F02M59/46

CPC classification number: F02M59/36 ,  F02M59/44 ,  F02M59/46 ,  F02M59/462 ,  F02M63/0054 ,  F02M2200/04

Abstract: Provided is a solution to a problem on a discharge valve mechanism disposed at an exit of a pressurizing chamber of a high-pressure fuel supply pump, that is, an occurrence of a backward flow of the fuel concentrates on a limited fuel passage, leading to a higher fuel flow rate, and this easily induces the occurrence of cavitation, and collapse of the generated cavitation might damage a seat surface, making it difficult to maintain valve functions. The present invention provides a valve mechanism including a seat member having a seat section, a valve body configured to attach to or detached from the seat section, and a housing member arranged on an outer peripheral side of the seat member. A first fluid flow-path is formed to connect an inner peripheral side and an outer peripheral side of the seat section in a case where the valve is detached from the seat section. A second fluid flow-path is formed to be connected with the first fluid flow-path, between an outer peripheral surface of the seat member and an inner peripheral surface of the housing member, or between an outer peripheral surface of the valve body and the inner peripheral surface of the housing member. The cross-sectional area along the axial direction of the valve mechanism of the second fluid flow-path is 0.18 mm square or above.

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

IPC: F02M59/46 ,  F02M59/34 ,  F04B19/22

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。

公开(公告)号：US20160290299A1

公开(公告)日：2016-10-06

申请号：US14777627

申请日：2014-02-03

Applicant: HITACHI AUTOMOTIVE SYSTEMS , LTD.

Inventor： Shunsuke ARITOMI ,  Hitoshi KONNO ,  Yukio TAKAHASHI ,  Masayuki SUGANAMI ,  Katsumi MIYAZAKI ,  Kenichirou TOKUO

IPC: F02M59/46 ,  F16K31/06 ,  F02M37/00

CPC classification number: F02M59/466 ,  F02M37/0023 ,  F02M59/36 ,  F02M59/367 ,  F02M59/46 ,  F02M59/464 ,  F16K31/06 ,  F16K31/0644 ,  F16K31/0655 ,  F16K31/0693

Abstract: It is an object of the present invention to provide an electromagnetic valve structure improved in terms of the responsiveness of the electromagnetic valve and helping to realize a more accurate flow rate control, and to provide a high-pressure fuel supply pump in which the same is mounted. There is provided a high-pressure fuel supply pump having an electromagnetic valve equipped with an electromagnetic coil generating an electromagnetic force for opening and closing a valve body provided between a fuel intake path and a pressure chamber, a movable member operated by the electromagnetic force, a housing accommodating the movable member, and a back-pressure chamber formed between the housing and the movable member, wherein a first fuel path causing the back-pressure chamber to communicate with the intake path passes the center axis of the movable member.

Abstract translation: 本发明的目的是提供一种电磁阀结构，其在电磁阀的响应性方面得到改进，并且有助于实现更精确的流量控制，并且提供一种高压燃料供给泵，其中， 安装。 提供一种高压燃料供给泵，其具有电磁阀，该电磁阀具有产生用于打开和关闭设置在燃料进入路径和压力室之间的阀体的电磁力的电磁线圈，由电磁力操作的可动部件， 容纳可动部件的壳体和形成在壳体和可动部件之间的背压室，其中使背压室与进气通路连通的第一燃料通路通过可动部件的中心轴线。

公开(公告)号：US20160281693A1

公开(公告)日：2016-09-29

申请号：US15032941

申请日：2014-10-01

Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.

Inventor： Shunsuke ARITOMI ,  Satoshi USUI ,  Atsuji SAITO ,  Tatsuo KAWANO ,  Masayuki SUGANAMI ,  Kenichirou TOKUO

IPC: F04B11/00 ,  F02M59/46 ,  F04B53/16 ,  F04B53/10 ,  F04B53/14 ,  F02M59/02 ,  F04B19/22

CPC classification number: F04B11/0091 ,  F02M59/025 ,  F02M59/368 ,  F02M59/462 ,  F02M59/466 ,  F02M63/0077 ,  F02M63/0078 ,  F02M2200/04 ,  F02M2200/28 ,  F04B19/22 ,  F04B53/1087 ,  F04B53/14 ,  F04B53/16

Abstract: An object of the present invention is to reduce erosion due to cavitation in proximity to a valve seat in a high-pressure fuel supply pump including a fuel flow passage having a bent portion in proximity to the valve seat, formed therein. The high-pressure fuel supply pump includes fuel passages interconnecting with a pressurizing chamber of fuel in which volume varies due to reciprocating motion of a plunger to be in the reciprocation motion, and fluid valves formed on the fuel passage. The fuel valves are included in a valve seat and a valve member. The fuel passages include a gap passage portion formed in a gap between the valve seat and the valve member, and a bent passage portion extending in a bent direction on the downstream side of the gap passage portion. In a case where a backflow direction of the fuel is defined as a reference, in terms of a passage surface on the side of an inner circumference of a bent passage portion including the gap passage portion and the bent passage portion, a recess portion is formed on an end portion on the upstream side of a passage surface included in the side of the bent passage portion.

Abstract translation: 本发明的目的是减少在包括形成在阀座附近的具有弯曲部分的燃料流动通道的高压燃料供给泵附近的阀座附近的气蚀的侵蚀。 高压燃料供给泵包括与由活塞往复运动的往复运动而体积变化的燃料加压室相互连接的燃料通路，以及形成在燃料通路上的流体阀。 燃料阀包括在阀座和阀构件中。 燃料通路包括形成在阀座和阀构件之间的间隙中的间隙通道部分和在间隙通道部分的下游侧沿弯曲方向延伸的弯曲通道部分。 在将燃料的回流方向定义为基准的情况下，就具有间隙通路部和弯曲通路部的弯曲通路部的内周侧的通路面而言，形成有凹部 在包括在弯曲通道部分侧面的通道表面的上游侧的端部上。

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

IPC: F04B19/22 ,  F04B1/04 ,  F02M59/10 ,  F02M59/44

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.

公开(公告)号：US20170248110A1

公开(公告)日：2017-08-31

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

IPC: F02M59/36 ,  F02M59/46 ,  F02M59/02 ,  F04B19/22 ,  F04B53/10

CPC classification number: F02M59/366 ,  F02M59/025 ,  F02M59/368 ,  F02M59/466 ,  F02M63/0022 ,  F02M2200/50 ,  F04B19/22 ,  F04B53/10 ,  F04B53/14 ,  F04B53/16

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.