Patents by Inventor Hiroshi Odakura
Hiroshi Odakura 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: 7757663Abstract: The objective of the present invention is to dampen operating sounds of an electromagnetic drive mechanism used for a variable displacement to reduce an individual difference depending on apparatus due to the control mechanism in a high-pressure fuel supply pump change over time or installation tolerance. To achieve the above objective, the present invention is configured such that before the electromagnetic drive mechanism supplies a drive force to a plunger which is electromagnetically driven by the electromagnetic drive mechanism, another displacement force situates the plunger in a specific position. When compared to an occasion where the plunger is displaced all strokes by a magnetic biasing force, the above configuration is able to reduce the force of impact on a member (for example, valve body) mounted to the plunger and a restricting member, thereby damping the collision noise.Type: GrantFiled: June 12, 2008Date of Patent: July 20, 2010Assignee: Hitachi, Ltd.Inventors: Satoshi Usui, Kenichiro Tokuo, Hiroyuki Yamada, Masami Abe, Hiroshi Odakura
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Patent number: 7744353Abstract: A fluid pump has a cylinder supporting a plunger and a pump housing formed with dissimilar metals. A pressing mechanism presses the cylinder and the pump housing relative to each other so that a pressurizing chamber is sealed through a pressing surface between the pump housing and the cylinder. The number of seal points can be reduce, and a reduction in reliability can be eliminated while realizing a reduction in weight of the pump housing and a reduction in cost due to increase in cutting capability, by using a soft material such as an aluminum alloy for the pump housing.Type: GrantFiled: January 5, 2001Date of Patent: June 29, 2010Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Hiroyuki Yamada, Atsuji Saito, Masayoshi Kotaki, Hiroshi Odakura, Masami Abe
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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: 20080302333Abstract: The objective of the present invention is to dampen operating sounds of an electromagnetic drive mechanism used for a variable displacement to reduce an individual difference depending on apparatus due to the control mechanism in a high-pressure fuel supply pump change over time or installation tolerance. To achieve the above objective, the present invention is configured such that before the electromagnetic drive mechanism supplies a drive force to a plunger which is electromagnetically driven by the electromagnetic drive mechanism, another displacement force situates the plunger in a specific position. When compared to an occasion where the plunger is displaced all strokes by a magnetic biasing force, the above configuration is able to reduce the force of impact on a member (for example, valve body) mounted to the plunger and a restricting member, thereby damping the collision noise.Type: ApplicationFiled: June 12, 2008Publication date: December 11, 2008Applicant: HITACHI, LTD.Inventors: Satoshi Usui, Kenichiro Tokuo, Hiroyuki Yamada, Masami Abe, Hiroshi Odakura
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Patent number: 7398768Abstract: The objective of the present invention is to dampen operating sounds of an electromagnetic drive mechanism used for a variable displacement control mechanism in a high-pressure fuel supply pump to reduce an individual difference depending on apparatus due to the change over time or installation tolerance. To achieve the above objective, the present invention is configured such that before the electromagnetic drive mechanism supplies a drive force to a plunger which is electromagnetically driven by the electromagnetic drive mechanism, another displacement force situates the plunger in a specific position. When compared to an occasion where the plunger is displaced all strokes by a magnetic biasing force, the above configuration is able to reduce the force of impact on a member (for example, valve body) mounted to the plunger and a restricting member, thereby damping the collision noise.Type: GrantFiled: February 16, 2006Date of Patent: July 15, 2008Assignee: Hitachi, Ltd.Inventors: Satoshi Usui, Kenichiro Tokuo, Hiroyuki Yamada, Masami Abe, Hiroshi Odakura
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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: 20060201485Abstract: The objective of the present invention is to dampen operating sounds of an electromagnetic drive mechanism used for a variable displacement control mechanism in a high-pressure fuel supply pump to reduce an individual difference depending on apparatus due to the change over time or installation tolerance. To achieve the above objective, the present invention is configured such that before the electromagnetic drive mechanism supplies a drive force to a plunger which is electromagnetically driven by the electromagnetic drive mechanism, another displacement force situates the plunger in a specific position. When compared to an occasion where the plunger is displaced all strokes by a magnetic biasing force, the above configuration is able to reduce the force of impact on a member (for example, valve body) mounted to the plunger and a restricting member, thereby damping the collision noise.Type: ApplicationFiled: February 16, 2006Publication date: September 14, 2006Applicant: Hitachi, Ltd.Inventors: Satoshi Usui, Kenichiro Tokuo, Hiroyuki Yamada, Masami Abe, 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: 20040052652Abstract: A fluid pump, wherein a cylinder supporting a plunger and a pump housing are formed with dissimilar metals and a pressing mechanism to press the cylinder and the pump housing relatively to each other is provided so that a pressurizing chamber is sealed through a pressing surface between the pump housing and the cylinder, whereby the number of seal points can be reduced and a reduction in reliability can be eliminated while realizing a reduction in weight of the pump housing and a reduction in cost due to increase in cutting capability using a soft member such as aluminum alloy for the pump housing.Type: ApplicationFiled: July 3, 2003Publication date: March 18, 2004Inventors: Hiroyuki Yamada, Atsuji Saito, Masayoshi Kotaki, Hiroshi Odakura, Masami Abe
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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
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Publication number: 20030017069Abstract: 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: February 28, 2002Publication date: January 23, 2003Applicant: Hitachi, Ltd.Inventors: Satoshi Usui, Hiroyuki Yamada, Toru Onose, Atsuji Saito, Masami Abe, Masayoshi Kotaki, Hiroshi Odakura