Patents by Inventor Motoyuki Abe
Motoyuki Abe 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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Publication number: 20070075166Abstract: A fuel-injection valve includes a fuel-injection hole, a valve element and a valve seat for opening and closing the fuel-injection hole, a force-applying member for applying force to the valve element in a direction of motion of the valve element, and a drive unit for applying force to the valve element in the direction opposite to that of the force applied by the force-applying member; wherein a secondary oscillation system, which interacts with a primary oscillation system including the valve element and the force-applying member, is added to the primary oscillation system, and the phase angle of force applied to the primary oscillation system by the secondary oscillation system is also staggered from that of force applied to the primary oscillation system, which is other than the force applied to the primary oscillation system by the secondary oscillation system, whereby the bouncing of the valve element during opening and closing of the valve is reduced, which in turn makes it possible to achieve very accType: ApplicationFiled: December 5, 2006Publication date: April 5, 2007Inventors: Masahiro Tsuchiya, Tosuke Hirata, Yoshio Okamoto, Tohru Ishikawa, Noriyuki Maekawa, Yoshiyuki Tanabe, Atsushi Sekine, Yuzo Kadomukai, Makoto Yamakado, Motoyuki Abe
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Patent number: 7163162Abstract: A fuel-injection valve includes a fuel-injection hole, a valve element and a valve seat for opening and closing the fuel-injection hole, a force-applying member for applying force to the valve element in a direction of motion of the valve element, and a drive unit for applying force to the valve element in the direction opposite to that of the force applied by the force-applying member; wherein a secondary oscillation system, which interacts with a primary oscillation system including the valve element and the force-applying member, is added to the primary oscillation system, and the phase angle of force applied to the primary oscillation system by the secondary oscillation system is also staggered from that of force applied to the primary oscillation system, which is other than the force applied to the primary oscillation system by the secondary oscillation system, whereby the bouncing of the valve element during opening and closing of the valve is reduced, which in turn makes it possible to achieve very accType: GrantFiled: October 31, 2002Date of Patent: January 16, 2007Assignee: Hitachi, Ltd.Inventors: Masahiro Tsuchiya, Tosuke Hirata, Yoshio Okamoto, Tohru Ishikawa, Noriyuki Maekawa, Yoshiyuki Tanabe, Atsushi Sekine, Yuzo Kadomukai, Makoto Yamakado, Motoyuki Abe
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Patent number: 7095599Abstract: When voltage changes occur in the battery used as a power supply in a fuel injection system, the amount of fuel injection also changes and the required amount of fuel injected cannot be obtained. To eliminate this problem, a fuel injector system is provided which has a fuel injection valve with at least one coil, a power supply, a power supply voltage detector, and a control unit for controlling the fuel injection valve. The control unit sets a reference value of a power supply voltages, and the above-mentioned fuel injection valve is controlled so as to obtain the required ampere-turns by reducing the resultant inductance of the coil when a power supply voltage detection value is less than the above-mentioned reference value, and the resultant inductance of the coil is increased when the power voltage detection value is greater than the reference value.Type: GrantFiled: January 20, 2004Date of Patent: August 22, 2006Assignee: Hitachi, Ltd.Inventors: Noriyuki Maekawa, Motoyuki Abe, Makoto Yamakado, Toru Ishikawa, Kooji Shibata
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Publication number: 20060180122Abstract: Information storage element 102 and transmitter-receiver 103 are molded in resin connector part 101 of fuel injection valve 100 which projects outside of the engine by molding. The precise control of an injection amount is enabled by using directly the characteristic of injection amount stored in information storage element 102, and obtaining the width of the injection command pulse corresponding to the injection amount instruction value. Thereby, the minimum injection amount which is the minimum value of the fuel supply amount which can be controlled is reduced.Type: ApplicationFiled: November 29, 2005Publication date: August 17, 2006Applicant: Hitachi, Ltd.Inventors: Noriyuki Maekawa, Motoyuki Abe, Kenichiro Tokuo, Takehiko Kowatari, Tohru Ishikawa, Toshiyuki Innami, Kazuhiko Hanawa, Satoshi Shimada
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Patent number: 7082922Abstract: In order to provide a fuel injection method of an internal combustion engine having higher combustion stability which can direct a part of concentrated fuel spray toward an ignition plug according to a fuel injection atmosphere, a fuel injection valve thereof, and an internal combustion engine, the present invention provides a fuel injection method of an internal combustion engine for injecting fuel so as to generate a part of high spray concentration and a part of low spray concentration on the cross section of spray by giving swirling force to fuel from an injection hole at the front end of a fuel injection valve, comprising the step of setting a reference indicating the position of a axis of the fuel injection valve indicating the injection direction of the part of high spray concentration in the rotational direction when fuel is injected into an atmosphere under the atmospheric pressure.Type: GrantFiled: October 13, 2004Date of Patent: August 1, 2006Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Motoyuki Abe, Noriyuki Maekawa, Takuya Shiraishi, Hiroshi Fujii, Mamoru Fujieda, Toru Ishikawa, Yoshiyuki Tanabe
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Patent number: 7082921Abstract: A fuel injection valve with high freedom to optimize the direction of fuel spray, the shape of spray, the length of penetration, the existence/absence of lead spray and the like, in correspondence with each type of internal combustion engine is provided. A swirling force about a central axis of an injection orifice is supplied by a swirler to fuel injected from the injection orifice. A central axis E of the injection orifice is slanted at a predetermined deflection angle to a central axis of a valve body. Further, a step portion is formed in an end surface of the injection orifice.Type: GrantFiled: April 30, 2004Date of Patent: August 1, 2006Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Shuuichi Shimizu, Takuya Shiraishi, Motoyuki Abe, Masahiko Hayatani, Kouji Shibata
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Patent number: 6915968Abstract: To enable the inclination of the injection direction and the distribution of the penetration force of spray to be adjusted over a wide range, and an axially symmetrical spray shape to be obtained even when the injection hole is inclined, or the shape of the spray to be changed without inclining the injection hole, a fuel passageway 203 is provided as a swirling force adjustment means between the valve seat 201 and injection hole 101 of the fuel injector. This swirling force adjustment means adjusts the distribution of the swirling force of the fuel flowing into injection hole 101, and thus adjusts the spray shape obtained as a result.Type: GrantFiled: January 10, 2003Date of Patent: July 12, 2005Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Motoyuki Abe, Yoshio Okamoto, Makoto Yamakado, Tohru Ishikawa, Shuichi Shimizu
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Publication number: 20050109311Abstract: In order to provide a fuel injection method of an internal combustion engine having higher combustion stability which can direct a part of concentrated fuel spray toward an ignition plug according to a fuel injection atmosphere, a fuel injection valve thereof, and an internal combustion engine, the present invention provides a fuel injection method of an internal combustion engine for injecting fuel so as to generate a part of high spray concentration and a part of low spray concentration on the cross section of spray by giving swirling force to fuel from an injection hole at the front end of a fuel injection valve, comprising the step of setting a reference indicating the position of a axis of the fuel injection valve indicating the injection direction of the part of high spray concentration in the rotational direction when fuel is injected into an atmosphere under the atmospheric pressure.Type: ApplicationFiled: October 13, 2004Publication date: May 26, 2005Applicants: HITACHI, LTD., HITACHI CAR ENGINEERING CO., LTD.Inventors: Motoyuki Abe, Noriyuki Maekawa, Takuya Shiraishi, Hiroshi Fujii, Mamoru Fujieda, Toru Ishikawa, Yoshiyuki Tanabe
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Publication number: 20050098651Abstract: Using a swirl type fuel injection valve, a concentrated spray area and a thin spray area are formed, the positions thereof are adjusted, and the spray is made to conform to the geometric shape of the engine and mounting position of the fuel injection valve, so as to reduce the fuel consumption and control the unburnt components in exhaust gas. The fuel injection valve is so constructed that a step is formed on the injection hole opening of the fuel injection valve, so as to provide two or more edge transition portions at the injection hole opening, resulting from the step, and the line connecting the edge transition portions forms an oblique angle relative to the wall formed by the step perpendicular to the injection hole center axis and the angled wall.Type: ApplicationFiled: December 28, 2004Publication date: May 12, 2005Inventors: Motoyuki Abe, Yoshio Okamoto, Yuzo Kadomukai, Makoto Yamakado, Ayumu Miyajima, Hiromasa Kubo, Toru Ishikawa, Yasuo Namaizawa
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Publication number: 20050073795Abstract: When voltage changes occur in the battery used as a power supply in a fuel injection system, the amount of fuel injection also changes and the required amount of fuel injected cannot be obtained. To eliminate this problem, a fuel injector system is provided which has a fuel injection valve with at least one coil, a power supply, a power supply voltage detector, and a control unit for controlling the fuel injection valve. The control unit sets a reference value of a power supply voltages, and the above-mentioned fuel injection valve is controlled so as to obtain the required ampere-turns by reducing the resultant inductance of the coil when a power supply voltage detection value is less than the above-mentioned reference value, and the resultant inductance of the coil is increased when the power voltage detection value is greater than the reference value.Type: ApplicationFiled: January 20, 2004Publication date: April 7, 2005Inventors: Noriyuki Maekawa, Motoyuki Abe, Makoto Yamakado, Toru Ishikawa, Kooji Shibata
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Patent number: 6854448Abstract: In an internal combustion engine, an amount of spray attaching onto an inner wall surface of an intake pipe is reduced by forming a two-directional spray of highly atomized fuel. The highly atomized two-directional spray can be obtained by a spray forming means constructed by piling a fuel in-plate forming fuel passages, a swirl plate forming fuel passages for adding swirl forces to the fuel, and an injection plate for determining injection directions of the fuel. Further, penetrations of the sprays injected toward two directions are made different from each other.Type: GrantFiled: August 31, 2001Date of Patent: February 15, 2005Assignee: Hitachi, Ltd.Inventors: Yoshio Okamoto, Yuzo Kadomukai, Motoyuki Abe, Ayumu Miyajima, Masami Nagano
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Patent number: 6845925Abstract: To produce a fuel spray that is asymmetrical in the flow rate distribution of a sprayed fuel in order to improve the homogeneity of air-fuel mixture density during the air intake stroke injection for homogeneous combustion in an in-cylinder injection engine, the exit portion of the fuel injection hole is provided with the wall surfaces 204a, 204b, 205a, and 205b that are parallel to the central axis of the injection hole. Also, the periphery of the injection hole is provided with a plurality of areas in which the flow of the fuel in the radial direction of the injection hole will be restrained, and an plurality of areas in which the flow of the fuel in the radial direction of the injection hole will not be restrained, and a different size is assigned to each non-restraint area.Type: GrantFiled: November 21, 2001Date of Patent: January 25, 2005Assignee: Hitachi, Ltd.Inventors: Motoyuki Abe, Yoshio Okamoto, Yuzo Kadomukai, Makoto Yamakado, Ayumu Miyajima, Toru Ishikawa, Yasuo Namaizawa
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Patent number: 6840465Abstract: Using a swirl type fuel injection valve, a concentrated spray area and a thin spray area are formed, the position thereof are adjusted, and the spray is made to conform to the geometric shape of the engine and mounting position of the fuel injection valve, so as to reduce the fuel consumption and control the unburnt components in exhaust gas. The fuel injection valve is so constructed that a step is formed on the injection hole opening of the fuel injection valve, so as to provide two or more edge transition portions at the injection hole opening, resulting from the step, and the line connecting the edge transition portions forms an oblique angle relative to the wall formed by the step perpendicular to the injection hole center axis and the angled wall.Type: GrantFiled: December 26, 2001Date of Patent: January 11, 2005Assignee: Hitachi, Ltd.Inventors: Motoyuki Abe, Yoshio Okamoto, Yuzo Kadomukai, Makoto Yamakado, Ayumu Miyajima, Hiromasa Kubo, Toru Ishikawa, Yasuo Namaizawa
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Publication number: 20040262431Abstract: A fuel injection valve with high freedom to optimize the direction of fuel spray, the shape of spray, the length of penetration, the existence/absence of lead spray and the like, in correspondence with each type of internal combustion engine is provided. A swirling force about a central axis of an injection orifice is supplied by a swirler to fuel injected from the injection orifice. A central axis E of the injection orifice is slanted at a predetermined deflection angle to a central axis of a valve body. Further, a step portion is formed in an end surface of the injection orifice.Type: ApplicationFiled: April 30, 2004Publication date: December 30, 2004Inventors: Shuuichi Shimizu, Takuya Shiraishi, Motoyuki Abe, Masahiko Hayatani, Kouji Shibata
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Publication number: 20040046064Abstract: A fuel injection valve to give the turn power around the center axis line of injection hole 17 to the fuel injected from the injection hole 17 by swirler 23. Center axis line E of injection hole 17 is inclined with respect to the center axis line C of said valve element by the fixed deflection angle &bgr;, and step difference 25 is formed on the pointed end of injection hole 17.Type: ApplicationFiled: September 9, 2003Publication date: March 11, 2004Applicant: Hitachi, Ltd.Inventors: Takuya Shiraishi, Motoyuki Abe, Shuuichi Shimizu, Masahiko Hayatani
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Patent number: 6668793Abstract: A fuel spray is directed toward an ignition plug. To an injection bole outlet portion of a swirl type fuel injector, an L-shaped cut out is provided, and the fuel spray is formed with a deflection fuel spray which has a strong swirl component that can inject with a large quantity. Accordingly, a reduction in the discharge HC amount and an improvement in the fuel consumption can be attained.Type: GrantFiled: September 18, 2001Date of Patent: December 30, 2003Assignee: Hitachi, Ltd.Inventors: Yoshio Okamoto, Ayumu Miyajima, Yuzo Kadomukai, Motoyuki Abe, Shigenori Togashi, Hiromasa Kubo, Hiroshi Fujii, Toru Ishikawa, Toshiharu Nogi
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Publication number: 20030155449Abstract: To supply a method that enables the inclination of the injection direction and the distribution of the penetration force of spray to be adjusted over a wide range, and an axially symmetrical spray shape to be obtained even when the injection hole is inclined, or the shape of the spray to be changed without inclining the injection hole. To provide a fuel passageway 203 as a swirling force adjustment means between the valve seat 201 and injection hole 101 of the fuel injector. This swirling force adjustment means adjusts the distribution of the swirling force of the fuel flowing into injection hole 101, and thus adjusts the spray shape obtained as a result.Type: ApplicationFiled: January 10, 2003Publication date: August 21, 2003Inventors: Motoyuki Abe, Yoshio Okamoto, Makoto Yamakado, Tohru Ishikawa, Shuichi Shimizu
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Publication number: 20030111563Abstract: A fuel-injection valve includes a fuel-injection hole, a valve element, a valve seat, a force-applying member applying force to the valve element in a direction of motion of the valve element, and a drive unit applying force to the valve element in an opposite direction of the force applied by the force-applying member. A secondary oscillation system is provided which interacts with a primary oscillation system including the valve element and the force-applying member. The phase angle of force applied to the primary oscillation system by the secondary oscillation system is staggered from that of force applied to the primary oscillation system, which is other than the force applied to the primary oscillation system by the secondary oscillation system. Thus, bouncing of the valve element during opening and closing of the valve is reduced to achieve very accurate fuel-injection control.Type: ApplicationFiled: October 31, 2002Publication date: June 19, 2003Inventors: Masahiro Tsuchiya, Tosuke Hirata, Yoshio Okamoto, Tohru Ishikawa, Noriyuki Maekawa, Yoshiyuki Tanabe, Atsushi Sekine, Yuzo Kadomukai, Makoto Yamakado, Motoyuki Abe
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Publication number: 20030094518Abstract: To realize spraying that is asymmetrical in the flow rate distribution of a sprayed fuel in order to improve the homogeneity of air-fuel mixture density during the air intake stroke injection for homogeneous combustion in an in-cylinder injection engine. By providing the exit portion of the fuel injection hole with the wall surfaces 204a, 204b, 205a, and 205b that are parallel to the central axis of the injection hole, further providing the periphery of the injection hole with an plurality of areas in which the flow of the fuel in the radial direction of the injection hole will be restrained, and an plurality of areas in which the flow of the fuel in the radial direction of the injection hole will not be restrained, and assigning a different size to each non-restraint area.Type: ApplicationFiled: November 21, 2001Publication date: May 22, 2003Inventors: Motoyuki Abe, Yoshio Okamoto, Yuzo Kadomukai, Makoto Yamakado, Ayumu Miyajima, Toru Ishikawa, Yasuo Namaizawa
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Patent number: 6474572Abstract: A fuel-injection valve includes a fuel-injection hole, a valve element and a valve seat for opening and closing the fuel-injection hole, a force-applying member for applying force to the valve element in a direction of motion of the valve element, and a drive unit for applying force to the valve element in the direction opposite to that of the force applied by the force-applying member; wherein a secondary oscillation system, which interacts with a primary oscillation system including the valve element and the force-applying member, is added to the primary oscillation system, and the phase angle of force applied to the primary oscillation system by the secondary oscillation system is also staggered from that of force applied to the primary oscillation system, which is other than the force applied to the primary oscillation system by the secondary oscillation system, whereby the bouncing of the valve element during opening and closing of the valve is reduced, which in turn makes it possible to achieve very accType: GrantFiled: March 2, 2000Date of Patent: November 5, 2002Assignee: Hitachi, Ltd.Inventors: Masahiro Tsuchiya, Tosuke Hirata, Yoshio Okamoto, Tohru Ishikawa, Noriyuki Maekawa, Yoshiyuki Tanabe, Atsushi Sekine, Yuzo Kadomukai, Makoto Yamakado, Motoyuki Abe