公开(公告)号：US20150017041A1

公开(公告)日：2015-01-15

申请号：US14497755

申请日：2014-09-26

Applicant: Hitachi, Ltd.,

Inventor： Satoshi USUI ,  Shingo TAMURA ,  Katsumi MIYAZAKI ,  Sunao TAKAHASHI ,  Masayuki SUGANAMI ,  Minoru HASHIDA

IPC: F02M37/00 ,  F02M21/02 ,  F02M37/04

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.

Abstract translation: 用于减小压力脉动的机构包括通过在整个圆周上连接两个盘形金属隔膜而形成的一对金属阻尼器，并在接合部分内形成气密密封的空间。 气体密封在阻尼器的上述密封空间中，并且一对按压构件在与接合部分的内径侧的位置处对上述金属阻尼器的两个外表面施加按压力。 该机构是一体化的，其中一对按压构件以它们夹着金属阻尼器的状态连接。

公开(公告)号：US20130149177A1

公开(公告)日：2013-06-13

申请号：US13754932

申请日：2013-01-31

Applicant: Hitachi, Ltd.

Inventor： Satoshi USUI ,  Shingo TAMURA ,  Katsumi MIYAZAKI ,  Sunao TAKAHASHI ,  Masayuki SUGANAMI ,  Minoru HASHIDA

IPC: F04B19/00

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, with gas being sealed in the aforementioned hermetically sealed space of the damper, has a pair of pressing members which give pressing forces to both outer surfaces of the aforementioned metal dampers at a position at an inner diameter side from the joined portion, and is unitized with the pair of pressing members being connected in a state in which they sandwich the metal damper.

Abstract translation: 用于减小压力脉动的机构包括一对金属阻尼器，其通过在两个圆周上连接两个盘形金属隔膜并在接合部分内形成气密密封空间而形成，气体密封在阻尼器的上述密封空间中， 具有一对按压构件，其在与接合部的内径侧的位置处对上述金属阻尼器的两个外表面施加按压力，并且将该一对按压构件与它们夹着的状态连接 金属阻尼器。

公开(公告)号：US20130302192A1

公开(公告)日：2013-11-14

申请号：US13944270

申请日：2013-07-17

Applicant: Hitachi, Ltd.

Inventor： Kenichiro TOKUO ,  Satoshi USUI ,  Hiroyuki YAMADA ,  Junichi SHIMADA ,  Masami ABE

IPC: F04B53/10

CPC classification number: F04B53/10 ,  F02M59/102 ,  F02M59/366 ,  F02M59/367 ,  F02M63/0015 ,  F02M63/004 ,  F02M63/0042 ,  F02M63/0043 ,  F02M63/0078 ,  F02M63/025 ,  F02M2200/28 ,  F02M2200/304

Abstract: A plunger type high-pressure fuel pump includes a plunger reciprocated in a cylinder. A fluid pressurizing chamber of the pump has a chamber with a capacity that changes with reciprocation of the plunger. An electromagnetic valve is provided between the pressurizing chamber and a fluid suction passage; as well as a discharge valve. The electromagnetic valve includes a valve member including a suction valve; a solenoid coil adapted to displace the valve member; an anchor made of a magnetic material provided integrally with the valve member; and a core forming a magnetic circuit to attract the anchor by the electromagnetic force and dividing the inside of the electromagnetic valve into an internal space and an external space communicating with the fluid suction passage. The anchor or the core is provided with a fluid passage through which fluid can flow between the internal space and the external space formed by the anchor and the core, respectively, when the suction valve is in an opened state.

Abstract translation: 柱塞型高压燃料泵包括在气缸中往复运动的柱塞。 泵的流体加压室具有容积随柱塞往复运动而变化的腔室。 在加压室和流体抽吸通道之间设有电磁阀; 以及排气阀。 电磁阀包括具有吸入阀的阀构件; 适于移动所述阀构件的电磁线圈; 由与阀构件一体设置的磁性材料构成的锚固件; 以及形成磁路的磁芯，其通过电磁力吸引锚固件，并将电磁阀的内部分成内部空间和与流体抽吸通道连通的外部空间。 锚固件或芯部设置有流体通道，当吸入阀处于打开状态时，流体可以分别通过该流体通道在内部空间和由锚固件和芯部形成的外部空间之间流动。

公开(公告)号：US20160160825A1

公开(公告)日：2016-06-09

申请号：US15041874

申请日：2016-02-11

Applicant: Hitachi, Ltd.

Inventor： Satoshi USUI ,  Hiroyuki YAMADA ,  Kenichiro TOKUO ,  Toru ONOSE ,  Masami ABE

IPC: F02M59/46 ,  F04B7/02 ,  F02M59/02 ,  F04B53/10 ,  F04B53/16 ,  F04B19/22 ,  F04B53/14

CPC classification number: F04B49/03 ,  F02M59/025 ,  F02M59/102 ,  F02M59/366 ,  F02M59/367 ,  F02M59/462 ,  F02M63/005 ,  F04B7/02 ,  F04B17/05 ,  F04B19/22 ,  F04B49/035 ,  F04B49/08 ,  F04B53/10 ,  F04B53/1002 ,  F04B53/1017 ,  F04B53/1087 ,  F04B53/14 ,  F04B53/16

Abstract: A high-pressure fuel pump includes a pressurizing chamber for pressurizing fuel, an outlet valve for discharging the fuel pressurized in the pressurizing chamber to an outlet passage, a relief passage for connecting the outlet passage located downstream of the outlet valve and the pressurizing chamber with each other while bypassing the outlet valve. A relief valve device is provided in the relief passage and adapted to open when an internal pressure of the outlet passage becomes higher than that of the pressurizing chamber, thereby providing communication between the outlet passage and the pressurizing chamber. The relief valve includes a relief spring mechanism for pressing a relief valve to a relief valve seat. At least the relief spring mechanism among members of the relief valve device is provided outside the pressurizing chamber in the pump body.

公开(公告)号：US20130280112A1

公开(公告)日：2013-10-24

申请号：US13926222

申请日：2013-06-25

Applicant: HITACHI, LTD.

Inventor： Satoshi USUI ,  Hiroyuki YAMADA ,  Kenichiro TOKUO ,  Toru ONOSE ,  Masami ABE

IPC: F04B53/06

CPC classification number: F02M59/46 ,  F02M59/025 ,  F02M59/102 ,  F02M59/366 ,  F02M59/367 ,  F02M59/462 ,  F02M63/005 ,  F04B7/02 ,  F04B19/22 ,  F04B49/03 ,  F04B49/08 ,  F04B53/10 ,  F04B53/1002 ,  F04B53/1017 ,  F04B53/1087 ,  F04B53/14 ,  F04B53/16

Abstract: A high-pressure fuel pump includes a pressurizing chamber for pressurizing fuel, an outlet valve for discharging the fuel pressurized in the pressurizing chamber to an outlet passage, a relief passage for connecting the outlet passage located downstream of the outlet valve and the pressurizing chamber with each other while bypassing the outlet valve. A relief valve device is provided in the relief passage and adapted to open when an internal pressure of the outlet passage becomes higher than that of the pressurizing chamber, thereby providing communication between the outlet passage and the pressurizing chamber. The relief valve includes a relief spring mechanism for pressing a relief valve to a relief valve seat. At least the relief spring mechanism among members of the relief valve device is provided outside the pressurizing chamber in the pump body.

Abstract translation: 高压燃料泵包括用于对燃料加压的加压室，用于将在加压室中加压的燃料排出到出口通道的出口阀，用于将位于出口阀下游的出口通道与加压室连接的排放通道， 彼此绕过出口阀。 安全阀装置设置在排泄通道中，适于在出口通道的内部压力高于加压室的压力时打开，从而在出口通道和加压室之间提供连通。 安全阀包括用于将安全阀按压到安全阀座的释放弹簧机构。 至少安全阀装置的构件之间的释放弹簧机构设置在泵体内的加压室的外部。