Patents by Inventor Toru Onose
Toru Onose has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10247181Abstract: 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.Type: GrantFiled: February 11, 2016Date of Patent: April 2, 2019Assignee: Hitachi, Ltd.Inventors: Satoshi Usui, Hiroyuki Yamada, Kenichiro Tokuo, Toru Onose, Masami Abe
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Patent number: 9759173Abstract: 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.Type: GrantFiled: May 5, 2015Date of Patent: September 12, 2017Assignee: Hitachi Automotive Systems, Ltd.Inventors: Minoru Hashida, Hiroyuki Yamada, Masayuki Suganami, Sunao Takahashi, Toru Onose, Hideaki Yamauchi, Kazuichi Ishige
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Publication number: 20160160825Abstract: 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.Type: ApplicationFiled: February 11, 2016Publication date: June 9, 2016Inventors: Satoshi USUI, Hiroyuki YAMADA, Kenichiro TOKUO, Toru ONOSE, Masami ABE
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Patent number: 9291162Abstract: 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.Type: GrantFiled: June 25, 2013Date of Patent: March 22, 2016Assignee: Hitachi, Ltd.Inventors: Satoshi Usui, Hiroyuki Yamada, Kenichiro Tokuo, Toru Onose, Masami Abe
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Publication number: 20150233332Abstract: 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.Type: ApplicationFiled: May 5, 2015Publication date: August 20, 2015Inventors: Minoru HASHIDA, Hiroyuki YAMADA, Masayuki SUGANAMI, Sunao TAKAHASHI, Toru ONOSE, Hideaki YAMAUCHI, Kazuichi ISHIGE
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Publication number: 20130280112Abstract: 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.Type: ApplicationFiled: June 25, 2013Publication date: October 24, 2013Inventors: Satoshi USUI, Hiroyuki YAMADA, Kenichiro TOKUO, Toru ONOSE, Masami ABE
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Patent number: 8382458Abstract: A high-pressure fuel pump is comprises of: a plunger which slidably fits to a cylinder and reciprocates for pressurizing and discharging a fuel taken in a pressurizing chamber; an inlet valve device for taking in a fuel into the pressurizing chamber; an outlet valve device for discharging the pressurized fuel from the pressurizing chamber; and a communicating pass which comprises a hole or a groove formed in the cylinder, and communicates between a pressurized fuel area and a gap between the cylinder and the plunger.Type: GrantFiled: July 20, 2007Date of Patent: February 26, 2013Assignee: Hitachi, Ltd.Inventors: Minoru Hashida, Hiroyuki Yamada, Junichi Shimada, Toru Onose, Satoshi Usui, Masami Abe, Tohru Himoto
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Publication number: 20120199103Abstract: In a conventional high-pressure fuel pump, the interference fit part between a plunger and a retainer comes loose with time due to environmental factors and this reduces the clearance between the retainer and a tappet more than necessity, resulting in increase in the contact face pressure between the plunger and a cylinder when a side force acts on the plunger, which causes seizure between the plunger and the cylinder. In this invention, a protrusion protruding toward the tappet is provided around the through-hole for press-fitting the plunger, the through-hole provided in the center portion of the retainer. Since the clearance between the retainer and the tappet can sufficiently be kept even if the joint between the retainer and the plunger comes loose, the seizure between the plunger and the cylinder and the breakage of the plunger are less likely to occur even if the side force acts on the retainer.Type: ApplicationFiled: August 17, 2010Publication date: August 9, 2012Applicant: Hitachi Automotive Systems LtdInventors: Minoru Hashida, Hiroyuki Yamada, Masayuki Suganami, Sunao Takahashi, Toru Onose, Hideaki Yamauchi, Kazuichi Ishige
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Patent number: 7665976Abstract: A high pressure fuel pump for an internal combustion engine having a cylinder, a plunger slidably fitted in the cylinder and a seal mechanism for blocking fuel leakage from an end of a sliding portion between the cylinder and the plunger and also for preventing an lubricant for a driving mechanism of the plunger from entering into the cylinder from the end of the sliding portion of the cylinder and the plunger. A holder surrounding the end of the sliding portion of the cylinder and the plunger is provided. The seal mechanism comprises two mutually independent seal devices mounted with a specific spacing in a longitudinal direction from the end of the sliding portion of the cylinder and the plunger along a circumference of the plunger. The two seal devices are held on the circumference of the plunger by the holder surrounding the end of the sliding portion of the cylinder and the plunger while keeping the specific spacing.Type: GrantFiled: April 24, 2006Date of Patent: February 23, 2010Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Satoshi Usui, Hiroyuki Yamada, Toru Onose, Atsuji Saito, Masami Abe, Masayoshi Kotaki, Hiroshi Odakura
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Patent number: 7513240Abstract: A fuel feed system capable of feeding a fuel to fuel injection valves at a fuel pressure with improved stability is provided. A fuel feed system for an internal combustion engine including a fuel tank and a low-pressure pump for feeding the fuel in the fuel tank to fuel injection valves, is provided with a diaphragm type damper having a wave-shape cross section at a position in contact with the fuel.Type: GrantFiled: January 11, 2007Date of Patent: April 7, 2009Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Satoshi Usui, Hiroshi Odakura, Toru Onose, Atsuji Saito, Masami Abe, Hiroyuki Yamada
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Publication number: 20080019853Abstract: A high-pressure fuel pump is comprises of: a plunger which slidably fits to a cylinder and reciprocates for pressurizing and discharging a fuel taken in a pressurizing chamber; an inlet valve device for taking in a fuel into the pressurizing chamber; an outlet valve device for discharging the pressurized fuel from the pressurizing chamber; and a communicating pass which comprises a hole or a groove formed in the cylinder, and communicates between a pressurized fuel area and a gap between the cylinder and the plunger.Type: ApplicationFiled: July 20, 2007Publication date: January 24, 2008Applicant: HITACHI, LTD.Inventors: Minoru HASHIDA, Hiroyuki YAMADA, Junichi SHIMADA, Toru ONOSE, Satoshi USUI, Masami ABE, Tohru HIMOTO
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Publication number: 20070110603Abstract: A high-pressure fuel pump comprises 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.Type: ApplicationFiled: November 15, 2006Publication date: May 17, 2007Applicant: Hitachi, Ltd.Inventors: Satoshi Usui, Hiroyuki Yamada, Kenichiro Tokuo, Toru Onose, Masami Abe
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Publication number: 20070107698Abstract: A fuel feed system capable of feeding a fuel to fuel injection valves at a fuel pressure with improved stability is provided. A fuel feed system for an internal combustion engine including a fuel tank and a low-pressure pump for feeding the fuel in the fuel tank to fuel injection valves, is provided with a diaphragm type damper having a wave-shape cross section at a position in contact with the fuel.Type: ApplicationFiled: January 11, 2007Publication date: May 17, 2007Applicants: HITACHI, LTD., HITACHI CAR ENGINEERING CO., LTD.Inventors: Satoshi Usui, Hiroshi Odakura, Toru Onose, Atsuji Saito, Masami Abe, Hiroyuki Yamada
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Patent number: 7165534Abstract: A fuel feed system capable of feeding a fuel to fuel injection valves at a fuel pressure with improved stability is provided. A fuel feed system for an internal combustion engine including a fuel tank and a low-pressure pump for feeding the fuel in the fuel tank to fuel injection valves, is provided with a diaphragm type damper having a wave-shape cross section at a position in contact with the fuel.Type: GrantFiled: October 21, 2002Date of Patent: January 23, 2007Assignees: Hitachi, Ltd., Hitachi Car Engineering Co, Ltd.Inventors: Satoshi Usui, Hiroshi Odakura, Toru Onose, Atsuji Saito, Masami Abe, Hiroyuki Yamada
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Patent number: 7152583Abstract: A simple structured high-pressure fuel pump. A fuel pump comprises a reciprocably-supported cylinder, a pressurizing chamber using part of the outer surface of the cylinder as the wall surface which move to change the internal volume, a fuel intake passage forming a fuel passage which introduces fuel to the pressurizing chamber, a fuel discharge passage for the compressed fuel coming out from the pressurizing chamber. A fuel intake valve is provided in fuel intake passage. A fuel discharge valve is provided in said fuel discharge passage. A connecting passage connects upstream side of the intake valve in the fuel intake passage and the downstream side of it. A check valve which flows fuel from the fuel discharge flow passage to the fuel intake passage is provided in the connecting passage.Type: GrantFiled: May 21, 2003Date of Patent: December 26, 2006Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Masami Abe, Hiroyuki Yamada, Toru Onose, Atsuji Saito, Satoshi Usui, Masayoshi Kotaki, Hiroshi Odakura
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Publication number: 20060228239Abstract: A high pressure fuel pump for an internal combustion engine having a cylinder, a plunger slidably fitted in the cylinder and a seal mechanism for blocking fuel leakage from an end of a sliding portion between the cylinder and the plunger and also for preventing an lubricant for a driving mechanism of the plunger from entering into the cylinder from the end of the sliding portion of the cylinder and the plunger. A holder surrounding the end of the sliding portion of the cylinder and the plunger is provided. The seal mechanism comprises two mutually independent seal devices mounted with a specific spacing in a longitudinal direction from the end of the sliding portion of the cylinder and the plunger along a circumference of the plunger. The two seal devices are held on the circumference of the plunger by the holder surrounding the end of the sliding portion of the cylinder and the plunger while keeping the specific spacing.Type: ApplicationFiled: April 24, 2006Publication date: October 12, 2006Applicants: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Satoshi Usui, Hiroyuki Yamada, Toru Onose, Atsuji Saito, Masami Abe, Masayoshi Kotaki, Hiroshi Odakura
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Publication number: 20040096346Abstract: A high pressure fuel pump for an internal combustion engine having a cylinder, a plunger slidably fitted in the cylinder and a seal mechanism for blocking fuel leakage from an end of a sliding portion between the cylinder and the plunger and also for preventing an lubricant for a driving mechanism of the plunger from entering into the cylinder from the end of the sliding portion of the cylinder and the plunger. A holder surrounding the end of the sliding portion of the cylinder and the plunger is provided. The seal mechanism comprises two mutually independent seal devices mounted with a specific spacing in a longitudinal direction from the end of the sliding portion of the cylinder and the plunger along a circumference of the plunger. The two seal devices are held on the circumference of the plunger by the holder surrounding the end of the sliding portion of the cylinder and the plunger while keeping the specific spacing.Type: ApplicationFiled: July 8, 2003Publication date: May 20, 2004Inventors: Satoshi Usui, Hiroyuki Yamada, Toru Onose, Atsuji Saito, Masami Abe, Masayoshi Kotaki, Hiroshi Odakura
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Publication number: 20040052664Abstract: A high-pressure fuel feed pump, wherein a pump housing is formed of an aluminum alloy, a cylinder is formed of iron base metal, the flange part of a flanged tube member is held in a contact part between the pump housing and the cylinder, the tube member is installed in the pump housing along the inner wall surface thereof. As a result, a seal surface is not corroded directly since cavitation occurs between the tip of the tube member and the pump housing.Type: ApplicationFiled: July 1, 2003Publication date: March 18, 2004Inventors: Atsuji Saito, Hiroyuki Yamada, Toru Onose, Masami Abe, Hiroshi Odakura
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Publication number: 20030219346Abstract: A simple structured high-pressure fuel pump.Type: ApplicationFiled: May 21, 2003Publication date: November 27, 2003Applicants: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Masami Abe, Hiroyuki Yamada, Toru Onose, Atsuji Saito, Satoshi Usui, Masayoshi Kotaki, Hiroshi Odakura
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Publication number: 20030164161Abstract: A fuel feed system capable of feeding a fuel to fuel injection valves at a fuel pressure with improved stability is provided. A fuel feed system for an internal combustion engine including a fuel tank and a low-pressure pump for feeding the fuel in the fuel tank to fuel injection valves, is provided with a diaphragm type damper having a wave-shape cross section at a position in contact with the fuel.Type: ApplicationFiled: October 21, 2002Publication date: September 4, 2003Applicant: Hitachi, Ltd.Inventors: Satoshi Usui, Hiroshi Odakura, Toru Onose, Atsuji Saito, Masami Abe, Hiroyuki Yamada