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1.发明申请公开(公告)号：US20190234359A1
公开(公告)日：2019-08-01
申请号：US15775944
申请日：2016-11-07
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Masanori WATANABE , Shunsuke ARITOMI , Kenichiro TOKUO , Masayuki SUGANAMI
CPC classification number: F02M59/368 , F02D41/20 , F02D41/38 , F02D41/406 , F02D2041/2003 , F02D2041/2037 , F02D2041/2044 , F02D2041/2048 , F02M59/466 , F02M63/0022
Abstract: It is an object of the present invention to provide a control method of a high-pressure fuel supply pump and a high-pressure fuel supply pump using the same capable of effectively reducing noise generated when an electromagnetic suction valve is opened. This can be realized such that, in a control method of a high-pressure fuel supply pump including a suction valve disposed on the suction side of the pressurizing chamber, a rod for urging the suction valve toward the opening valve direction, and an anchor for moving the rod in the closing valve direction with attraction by magnetic attraction caused by a solenoid being energized, when the anchor moves in the opening valve direction, a first drive current is passed through the solenoid for a predetermined period of time, and thereafter a second drive current larger than the first drive current is passed through the solenoid for a predetermined period of time.
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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：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：US20180128229A1
公开(公告)日：2018-05-10
申请号：US15566060
申请日：2016-04-15
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Moritsugu AKIYAMA , Shigehiko OMATA , Katsutoshi KOBAYASHI , Kenichiro TOKUO
CPC classification number: F02M63/026 , F02M55/02 , F02M59/025 , F02M59/46 , F02M59/462 , F02M63/0036 , F02M63/0054 , F02M63/0077 , F02M63/0078 , F02M63/0245 , F02M63/025 , F02M2200/04 , F16K15/044
Abstract: An object is to suppress cavitation generated at a distal end portion of a seat face when a valve body and a seat portion collide with each other. In a relief valve of a fuel pump, an intersection between the seat face and a flow channel hole is formed at a position more distant than the seat portion formed of the valve body in a valve closing state and the seat face in order to suppress generation of cavitation bubbles when the valve body improves and releases high-pressure fuel.
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Patent Agency Ranking
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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公开(公告)号：US20180171992A1
公开(公告)日：2018-06-21
申请号：US15577050
申请日：2016-06-13
Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
Inventor： Atsuji SAITO , Satoshi USUI , Masamichi YAGAI , Minoru HASHIDA , Masayuki SUGANAMI , Kenichiro TOKUO , Atsushi HOHKITA , Yuta SASO , Kazuaki TOKUMARU
CPC classification number: F04B11/00 , F02M55/04 , F02M59/02 , F02M59/44 , F02M2200/315 , F02M2200/8061 , F04B11/0033 , F04B53/16
Abstract: A high-pressure fuel pump capable of reducing the number of components and decreasing the manufacturing cost by processing of a pump body is provided. The high-pressure fuel pump includes a metal damper, a pump body in which a damper housing that houses the metal damper is formed, a damper cover attached to the pump body, covering the damper housing, and holding the metal damper between the pump body and the damper cover, and a holding member fixed to the damper cover and holding the metal damper from a side opposite to the damper cover. The holding member is provided with an elastic portion that urges the pump body so that the metal damper is urged toward the damper cover.
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公开(公告)号：US20180135579A1
公开(公告)日：2018-05-17
申请号：US15736464
申请日：2016-06-03
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Ryo KUSAKABE , Kenichiro TOKUO , Satoshi USUI , Minoru HASHIDA , Masayuki SUGANAMI , Atsushi HOHKITA , Eiichi KUBOTA , Daisuke KITAJIMA , Hiroshi HORIE
Abstract: Responsiveness of an electromagnetic flow-rate control valve provided for closing a suction valve is improved and a discharge flow rate is controlled to a desired value. A flow-rate control valve includes a fixed core arranged on an inner circumferential side of a coil, a yoke arranged on an outer circumferential side of the coil, and a cover portion opposed to the coil in an axial direction, in which the fixed core has an enlarged portion in contact with the cover portion in the axial direction and enlarging toward the coil, and the cover portion is regulated in the axial direction only by a contact portion with the fixed core.
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公开(公告)号：US20180066619A1
公开(公告)日：2018-03-08
申请号：US15705660
申请日：2017-09-15
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Satoshi USUI , Kenichiro TOKUO , Tatsuo KAWANO , Masahiko HAYATANI , Shingo TAMURA , Hiroyuki YAMADA , Katsumi MIYAZAKI
Abstract: A fuel pump includes an intake valve unit which is provided between a low-pressure chamber and a pressurizing chamber. The intake valve unit includes an intake valve configured to move in an axial direction of the intake valve unit and a valve stopper arranged between the intake valve and the pressurizing chamber. A plurality of fuel passages configured to allow fuel to communicate between the low-pressure chamber and the pressurizing chamber are formed on a radially outward of an outer peripheral surface of the valve stopper.
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公开(公告)号：US20200248663A1
公开(公告)日：2020-08-06
申请号：US16756160
申请日：2018-10-29
Applicant: Hitachi Automotive Systems, Ltd.
Inventor： Kenichiro TOKUO , Satoshi USUI , Ryo KUSAKABE
IPC: F02M59/44
Abstract: To provide a high-pressure fuel pump capable of ensuring good magnetic properties and reliability for cracking. Therefore, the fixed core 39 is precipitation hardening type ferritic stainless steel (ferritic precipitation hardening type metal). The anchor 36 is precipitation hardening type ferritic stainless steel attracted by the magnetic attraction force of the fixed core 39. The outer core 38 has an inner peripheral surface on which the outer peripheral surface of the anchor 36 slides. The seal ring 48 is formed of a material having hardness lower than that of the fixed core 39 and the anchor 36, and connects the fixed core 39 and the outer core 38.
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