Patents by Inventor Hidefumi Adachi
Hidefumi Adachi 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: 7096109Abstract: After cruise control is restored by an accelerating operation, the driver set speed is changed according to the displacement of the accelerator pedal. It becomes possible to reduce the driver set speed due to release of the accelerator pedal, that is, the vehicle can be decelerated by the engine. Even if the cruise control is restored, the cruise control is not conducted and the vehicle can be decelerated by the engine if the driver wants to decelerate the vehicle by the release of the accelerator pedal.Type: GrantFiled: November 6, 2003Date of Patent: August 22, 2006Assignee: Hitachi, Ltd.Inventors: Taisetsu Tanimichi, Kimihiro Yamai, Yuichi Kuramochi, Hidefumi Adachi, Eiichirou Kondou, Kentarou Ueno, Takafumi Suzuki
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Patent number: 6975931Abstract: A cruise control capable of maintaining the speed of a vehicle at a set cruise speed is selected when the headway distance to a preceding vehicle is equal to or greater than a set distance. Headway distance control, maintaining the headway distance to the preceding vehicle at a required value, is selected when the headway distance is smaller than a set distance. Fleet driving, in which the vehicle runs at the same set speed as that of the preceding vehicle, is enabled by increasing the vehicle speed upper limit existing under the headway distance control above a set cruise speed.Type: GrantFiled: April 24, 2003Date of Patent: December 13, 2005Assignee: Hitachi, Ltd.Inventor: Hidefumi Adachi
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Publication number: 20050149247Abstract: To provide a headway control system, in which a congestion following processing can be started by the same operation as in ordinary driving. An arrangement is provided that lets a following control unit 10 to start a control to follow a preceding vehicle on condition that a characteristic value, which is produced in a host vehicle when a driver starts moving the host vehicle, is detected in congested traffic. Acceleration or a vehicle speed may be used as the characteristic value. Another possible arrangement is to start the following control on condition that a variation in an engine of the host vehicle, which is generated in the host vehicle when the driver operates to start moving the host vehicle, is detected in congested traffic.Type: ApplicationFiled: February 28, 2005Publication date: July 7, 2005Applicant: HITACHI, LTD.Inventors: Yuichi Kuramochi, Toshio Manaka, Hidefumi Adachi
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Patent number: 6876915Abstract: To provide a headway control system, in which a congestion following processing can be started by the same operation as in ordinary driving. An arrangement is provided that lets a following control unit 10 to start a control to follow a preceding vehicle on condition that a characteristic value, which is produced in a host vehicle when a driver starts moving the host vehicle, is detected in congested traffic. Acceleration or a vehicle speed may be used as the characteristic value. Another possible arrangement is to start the following control on condition that a variation in an engine of the host vehicle, which is generated in the host vehicle when the driver operates to start moving the host vehicle, is detected in congested traffic.Type: GrantFiled: September 26, 2002Date of Patent: April 5, 2005Assignee: Hitachi, Ltd.Inventors: Yuichi Kuramochi, Toshio Manaka, Hidefumi Adachi
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Patent number: 6865471Abstract: A vehicle cruise control apparatus is provided for controlling a vehicle to run at a set speed desired by a driver. The apparatus stores a state in which the driver inputs a set speed (for example, the number of times the driver inputs the set speeds and a period at which the driver inputs the set speeds), and calculates a target acceleration/deceleration from the input state and a vehicle speed deviation (calculated by subtracting the actual vehicle speed from the set speed).Type: GrantFiled: April 10, 2003Date of Patent: March 8, 2005Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Yasufumi Konishi, Taisetsu Tanimichi, Tatsuya Yoshida, Toshio Manaka, Hidefumi Adachi, Eiichiro Kondo
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Publication number: 20040093145Abstract: After cruise control is restored by an accelerating operation, the driver set speed is changed according to the displacement of the accelerator pedal. It becomes possible to reduce the driver set speed due to release of the accelerator pedal, that is, the vehicle can be decelerated by the engine. Even if the cruise control is restored, the cruise control is not conducted and the vehicle can be decelerated by the engine if the driver wants to decelerate the vehicle by the release of the accelerator pedal.Type: ApplicationFiled: November 6, 2003Publication date: May 13, 2004Applicant: Hitachi, Ltd.Inventors: Taisetsu Tanimichi, Kimihiro Yamai, Yuichi Kuramochi, Hidefumi Adachi, Eiichirou Kondou, Kentarou Ueno, Takafumi Suzuki
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Patent number: 6691651Abstract: An engine valve operating system of an electromagnetic type is arranged to locate a movable member between two electromagnets through a distance block and to connect the two electromagnets through side walls. By alternately energizing the electromagnets, the movable member is reciprocated against spring forces of two springs. An engine valve is interlocked with the movable member and operates according to the reciprocal movement of the movable member. The side wall and/or distance block is made of soft magnetic material and forms a magnetic circuit penetrating a side surface of the movable plate. This new magnetic circuit increases the attracting force of the electromagnet when a clearance between the movable member and the electromagnet is greater than a predetermined clearance. This arrangement decreases energy consumption for the initializing operation of the valve operating system from a neutral position between the electromagnets.Type: GrantFiled: March 15, 2001Date of Patent: February 17, 2004Assignees: Nissan Motor Co., Ltd., Hitachi, Ltd.Inventors: Koichiro Yonekura, Hidefumi Adachi, Yoshikazu Hoshi
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Publication number: 20030204300Abstract: To realize fleet driving, the upper-limit value of the vehicle speed placed under headway distance control with adaptive cruise control is increased than a value moderately greater than the set vehicle speed and the ACC allowing for the differences in vehicle speed between vehicles is conducted.Type: ApplicationFiled: April 24, 2003Publication date: October 30, 2003Applicant: HITACHI, LTD.Inventor: Hidefumi Adachi
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Publication number: 20030195691Abstract: A vehicle cruise control apparatus is provided for controlling a vehicle to run at a set speed desired by a driver. The apparatus stores a state in which the driver inputs a set speed (for example, the number of times the driver inputs the set speeds and a period at which the driver inputs the set speeds), and calculates a target acceleration/deceleration from the input state and a vehicle speed deviation (calculated by subtracting the actual vehicle speed from the set speed).Type: ApplicationFiled: April 10, 2003Publication date: October 16, 2003Applicants: HITACHI, LTD., HITACHI CAR ENGINEERING CO., LTD.Inventors: Yasufumi Konishi, Taisetsu Tanimichi, Tatsuya Yoshida, Toshio Manaka, Hidefumi Adachi, Eiichiro Kondo
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Publication number: 20030171857Abstract: To provide a headway control system, in which a congestion following processing can be started by the same operation as in ordinary driving.Type: ApplicationFiled: September 26, 2002Publication date: September 11, 2003Applicant: Hitachi, Ltd.Inventors: Yuichi Kuramochi, Toshio Manaka, Hidefumi Adachi
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Publication number: 20030045990Abstract: An ACC apparatus for a vehicle in which, responsive to cancellation of ACC by the driver, a new cruise speed is selected depending upon a traveling environment to be encountered thereafter.Type: ApplicationFiled: February 27, 2002Publication date: March 6, 2003Applicant: Hitachi, Ltd.Inventor: Hidefumi Adachi
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Publication number: 20010032603Abstract: An engine valve operating system of an electromagnetic type is arranged to locate a movable member between two electromagnets through a distance block and to connect the two electromagnets through side walls. By alternately energizing the electromagnets, the movable member is reciprocated against spring forces of two springs. An engine valve is interlocked with the movable member and operates according to the reciprocal movement of the movable member. The side wall and/or distance block is made of soft magnetic material and forms a magnetic circuit penetrating a side surface of the movable plate. This new magnetic circuit increases the attracting force of the electromagnet when a clearance between the movable member and the electromagnet is greater than a predetermined clearance. This arrangement decreases energy consumption for the initializing operation of the valve operating system from a neutral position between the electromagnets.Type: ApplicationFiled: March 15, 2001Publication date: October 25, 2001Applicant: Nissan Motor Co., Ltd.Inventors: Koichiro Yonekura, Hidefumi Adachi, Yoshikazu Hoshi
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Patent number: 6186115Abstract: A throttle valve is rotatably mounted to a throttle body through a throttle shaft. An internal bore shape of the throttle body is of a straight bore type having a shape in which the center of rotation of the throttle valve is placed on the central line of the throttle body. Spherically-shaped internal profile portions are provided in an idle control region lying in the neighborhood of a fully-closed angle of the throttle valve. Further, spherically-shaped internal profile portions are provided as regions following the spherically-shaped internal profile portions referred to above. Moreover, regions each formed by a spherical shape and a composite surface profile of a cylindrical surface substantially parallel to the flow of intake air or regions each formed by a conical surface profile are provided as regions following the spherically-shaped profiles. Incidentally, the center of each spherical profile is offset on the central line of the bore in upward and downward directions.Type: GrantFiled: June 15, 1998Date of Patent: February 13, 2001Assignee: Hitachi, Ltd.Inventors: Mitsunori Nishimura, Hidefumi Adachi, Yoshikatsu Hashimoto
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Patent number: 5722366Abstract: Disclosed is a throttle valve control device for internal combustion engines which has good measuring accuracy and improved controllability of an air flow rate. A throttle valve is rotatably attached to a throttle body through a throttle shaft. The throttle body has an inner surface of straight bore type that the center of rotation of the throttle valve is positioned on a line connecting the centers of an upstream opening and a downstream opening of the throttle body. The throttle body has a spherical inner surface X2 in an idle speed control area .theta.2 near the fully closed angle of the throttle valve. The throttle body also has, in an area .theta. subsequent to the spherical inner surface X2, an inner surface X3 having a composite form made up of a spherical surface and a cylindrical surface substantially parallel to a flow of intake air.Type: GrantFiled: December 19, 1996Date of Patent: March 3, 1998Assignee: Hitachi, Ltd.Inventors: Hidefumi Adachi, Yoshikatsu Hashimoto, Mitsunori Nishimura