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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
发明人： Minoru HASHIDA , Atsushi HOHKITA , Masayuki SUGANAMI , Satoshi USUI , Masaru KAWAI , Arata KAGIYAMA
摘要： 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：US20190301414A1
公开(公告)日：2019-10-03
申请号：US16304537
申请日：2017-04-11
发明人： Satoshi USUI , Atsuji SAITO , Minoru HASHIDA , Masamichi YAGAI , Kenichiro TOKUO , Masayuki SUGANAMI , Masahiko HAYATANI , Hiroyuki YAMADA
摘要： 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
发明人： Satoshi USUI , Atsushi HOHKITA , Masayuki SUGANAMI , Kenichiro TOKUO , Minoru HASHIDA , Masamichi YAGAI , Yuta SASO , Kazuaki TOKUMARU , Atsuji SAITO
摘要： 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：US20190003475A1
公开(公告)日：2019-01-03
申请号：US16126774
申请日：2018-09-10
发明人： Satoshi USUI , Shingo TAMURA , Katsumi MIYAZAKI , Sunao TAKAHASHI , Masayuki SUGANAMI , Minoru HASHIDA
IPC分类号： F04B53/14 , F02M59/48 , F02M37/00 , F02M59/44 , F04B11/00 , F04B9/04 , F04B35/01 , F02M55/04
摘要： 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
发明人： Satoshi USUI , Shingo TAMURA , Katsumi MIYAZAKI , Sunao TAKAHASHI , Masayuki SUGANAMI , Minoru HASHIDA
IPC分类号： F04B53/14 , F02M59/48 , F02M59/44 , F02M37/00 , F04B9/04 , F04B11/00 , F02M55/04 , F04B35/01
CPC分类号： F04B53/143 , F02M37/0041 , F02M55/04 , F02M59/442 , F02M59/48 , F04B9/042 , F04B11/0008 , F04B35/01
摘要： 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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公开(公告)号：US20180171992A1
公开(公告)日：2018-06-21
申请号：US15577050
申请日：2016-06-13
发明人： Atsuji SAITO , Satoshi USUI , Masamichi YAGAI , Minoru HASHIDA , Masayuki SUGANAMI , Kenichiro TOKUO , Atsushi HOHKITA , Yuta SASO , Kazuaki TOKUMARU
CPC分类号： F04B11/00 , F02M55/04 , F02M59/02 , F02M59/44 , F02M2200/315 , F02M2200/8061 , F04B11/0033 , F04B53/16
摘要： 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
发明人： Ryo KUSAKABE , Kenichiro TOKUO , Satoshi USUI , Minoru HASHIDA , Masayuki SUGANAMI , Atsushi HOHKITA , Eiichi KUBOTA , Daisuke KITAJIMA , Hiroshi HORIE
摘要： 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：US20170306905A1
公开(公告)日：2017-10-26
申请号：US15515910
申请日：2015-09-04
IPC分类号： F02M37/00 , F02M59/44 , F04B49/22 , F02M55/04 , F04B49/24 , F02M59/36 , F16K31/06 , F04B11/00 , F02M63/02
CPC分类号： F02M37/0041 , F02M37/00 , F02M55/04 , F02M59/027 , F02M59/102 , F02M59/36 , F02M59/366 , F02M59/44 , F02M59/442 , F02M59/46 , F02M59/464 , F02M59/466 , F02M63/0225 , F02M2200/09 , F02M2200/315 , F04B11/0033 , F04B49/225 , F04B49/243 , F16K31/06
摘要： An object of the present invention is to obtain a high pressure fuel supply pump capable of reducing pressure pulsation that occurs in a low pressure pipe, preventing damage to the low pressure pipe, or reducing noise due to vibrations of the low pressure pipe. The present invention provides a high pressure fuel supply pump of a type in which, from a fuel suction port connected to a low pressure pipe provided upstream of a fuel, a low pressure passage, an electromagnetic suction valve driven by an electromagnetic force, a pressurizing chamber in which the volume thereof is increased or reduced by a plunger that is reciprocatingly moved by being guided by a cylinder, and a discharge valve provided at an outlet of the pressurizing chamber are sequentially arranged, a fuel is sucked to the pressurizing chamber through the electromagnetic suction valve, the amount of a part of the fuel, which is sucked to the pressurizing chamber, to be returned to the low pressure passage side is adjusted so that the amount of the fuel to be discharged through the discharge valve is controlled, and the high pressure fuel supply pump includes a backflow suppression mechanism for suppressing backflow of fuel from the fuel from the fuel suction portion to the low pressure pipe side.
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公开(公告)号：US20150233332A1
公开(公告)日：2015-08-20
申请号：US14704057
申请日：2015-05-05
发明人： Minoru HASHIDA , Hiroyuki YAMADA , Masayuki SUGANAMI , Sunao TAKAHASHI , Toru ONOSE , Hideaki YAMAUCHI , Kazuichi ISHIGE
CPC分类号： F02M59/102 , F02M59/025 , F02M59/44 , F02M59/442 , F04B1/0408 , F04B1/0426
摘要： A high-pressure fuel pump includes a pump body, a plunger, a retainer, a spring that is configured to energize the plunger in a direction opposite to a direction of the pressurizing chamber, and a tappet covering the retainer from a side of an end portion of the retainer and the plunger. The retainer is provided with a projection portion protruding to a side of the tappet. The projection portion is separated from the tappet by a predetermined distance along an axial direction of the plunger.
摘要翻译： 高压燃料泵包括泵体，柱塞，保持器，弹簧，其构造成沿着与加压室的方向相反的方向对柱塞通电;以及从端部的侧面覆盖保持器的挺杆 保持器和柱塞的一部分。 保持器设置有突出部分，突出到挺杆的一侧。 突出部分沿着柱塞的轴向与挺杆分开预定的距离。
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公开(公告)号：US20190323465A1
公开(公告)日：2019-10-24
申请号：US16342278
申请日：2017-10-26
发明人： Atsuji SAITO , Satoshi USUI , Minoru HASHIDA , Masayuki SUGANAMI , Hiroyuki YAMADA , Kenichiro TOKUO , Masamichi YAGAI , Yuta SASO
摘要： An object of the present invention is to supply a high-pressure fuel supply pump capable of holding a spring holding member while reducing the height of the pump body.A high-pressure fuel supply pump is provided with a pump body for forming a pressurizing chamber at an inner wall portion, and a flange portion for fixing the pump body to a high-pressure fuel supply pump mounting portion. The high-pressure fuel supply pump is provided with a cylinder and a spring holding member. The cylinder is inserted into a hole portion of the pump body from a lower side and in which the pressurizing chamber is formed further above an uppermost end surface. The spring holding member has an outer peripheral portion press-fitted and fixed to the pump body and a holding portion holding a spring portion for biasing the pump body between the outer peripheral portion and the inner peripheral portion. A spring-side lowest end portion of the holding surface of the spring holding member is disposed above the lowermost end portion of the flange portion.
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