Patents by Inventor Toshiaki Asada
Toshiaki Asada 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: 7059297Abstract: A stop control apparatus for an internal combustion engine is provided with a valve mechanism capable of operating at least one of an intake valve and an exhaust valve independently a crankshaft of an internal combustion engine, and a valve controlling device for controlling an operation of the valve mechanism so that the internal combustion engine is stopped in a predetermined state.Type: GrantFiled: November 28, 2003Date of Patent: June 13, 2006Assignee: Toyota Jidosha Kabushiki KaishaInventors: Kenji Kataoka, Toshiaki Asada, Shuichi Ezaki, Kimitoshi Tsuji, Yasushi Kusaka
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Patent number: 7055480Abstract: There is provided a valve gear of an internal combustion engine, comprising a cam mechanism for converting rotational motion of an electric motor into linear motion to drive a valve for opening and closing a cylinder against a valve spring, and a torque reduction mechanism for adding an opposite torque, which serves so as to reduce a torque applied to the cam mechanism from the valve spring at the time of driving the valve, to the cam mechanism.Type: GrantFiled: November 16, 2004Date of Patent: June 6, 2006Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yasushi Kusaka, Toshiaki Asada, Shuichi Ezaki, Kimitoshi Tsuji
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Publication number: 20060112919Abstract: A valve-driving system, which is applied to an internal combustion engine having a plurality of cylinders, for driving an intake or exhaust valve provided in each cylinder, comprising: a plurality of valve-driving apparatuses, each of which is provided for at least each one of the intake valve and the exhaust valve, each valve-driving apparatus having an electrical motor as a driving source for generating rotation motion and a power transmission mechanism provided with a transmitting section for transmitting the rotation motion generated by the electrical motor and a converting section for converting the rotation motion transmitted from the transmitting section into opening and closing motion of the valve to be driven; and a motor control device which controls operations of electric motors of the respective valve-driving apparatuses in accordance with the operation state of the internal combustion engine.Type: ApplicationFiled: January 12, 2006Publication date: June 1, 2006Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Toshiaki Asada, Shuichi Ezaki, Kimitoshi Tsuji, Yasushi Kusaka, Kenji Kataoka
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Patent number: 7047922Abstract: A valve-driving system, which is applied to an internal combustion engine having a plurality of cylinders, for driving an intake or exhaust valve provided in each cylinder, comprising: a plurality of valve-driving apparatuses, each of which is provided for at least each one of the intake valve and the exhaust valve, each valve-driving apparatus having an electrical motor as a driving source for generating rotation motion and a power transmission mechanism provided with a transmitting section for transmitting the rotation motion generated by the electrical motor and a converting section for converting the rotation motion transmitted from the transmitting section into opening and closing motion of the valve to be driven; and a motor control device which controls operations of electric motors of the respective valve-driving apparatuses in accordance with the operation state of the internal combustion engine.Type: GrantFiled: December 3, 2003Date of Patent: May 23, 2006Assignee: Toyota Jidosha Kabushiki KaishaInventors: Toshiaki Asada, Shuichi Ezaki, Kimitoshi Tsuji, Yasushi Kusaka, Kenji Kataoka
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Patent number: 7028656Abstract: A start control apparatus for an internal combustion engine according to the present invention is characterized by that in a port injection type internal combustion engine, fuel is supplied in the interior of a cylinder that is in its compression stroke or expansion stroke upon stoppage of the internal combustion engine, and upon the next start of the internal combustion engine, the fuel in the interior of the aforementioned cylinder is burned to rotate the engine output shaft utilizing the pressure generated when the fuel is burned. Thus, the torque required for cranking the internal combustion engine is reduced and the load applied on a starter apparatus such as a starter motor is reduced.Type: GrantFiled: December 30, 2004Date of Patent: April 18, 2006Assignee: Toyota Jidosha Kabushiki KaishaInventors: Kimitoshi Tsuji, Yasushi Kusaka, Kenji Kataoka, Toshiaki Asada, Shinichi Mitani
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Patent number: 7004125Abstract: A valve train system for operating an intake valve of an internal combustion engine, in which an operation amount of the intake valve is controlled. When it is determined that there is a need of improving a fuel efficiency by increasing the compression ratio within the combustion chamber on the basis of an engine operating state, an exhaust valve is opened and subsequently closed after an intake stroke until the pressure within the exhaust chamber becomes equal to the pressure within the exhaust passage so as to increase the compression ratio within the exhaust valve.Type: GrantFiled: August 21, 2003Date of Patent: February 28, 2006Assignee: Toyota Jidosha Kabushiki KaishaInventor: Toshiaki Asada
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Publication number: 20050193969Abstract: A variable valve mechanism is installed to change the operating angle and lift amount of an intake valve in accordance with the rotation position of a control shaft. A worm wheel is secured to the control shaft. The worm wheel is coupled to a motor actuator via a worm gear. The motor actuator is controlled during a normal operation so that the rotation position of the control shaft changes within a normal rotation range. A low-end stopper and high-end stopper are installed outside the normal rotation range to mechanically restrict the rotation of the control shaft.Type: ApplicationFiled: February 18, 2005Publication date: September 8, 2005Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shuichi Ezaki, Toshiaki Asada, Manabu Tateno
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Publication number: 20050115534Abstract: A start control apparatus for an internal combustion engine according to the present invention is characterized by that in a port injection type internal combustion engine, fuel is supplied in the interior of a cylinder that is in its compression stroke or expansion stroke upon stoppage of the internal combustion engine, and upon the next start of the internal combustion engine, the fuel in the interior of the aforementioned cylinder is burned to rotate the engine output shaft utilizing the pressure generated when the fuel is burned. Thus, the torque required for cranking the internal combustion engine is reduced and the load applied on a starter apparatus such as a starter motor is reduced.Type: ApplicationFiled: December 30, 2004Publication date: June 2, 2005Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kimitoshi Tsuji, Yasushi Kusaka, Kenji Kataoka, Toshiaki Asada, Shinichi Mitani
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Publication number: 20050098129Abstract: There is provided a valve gear of an internal combustion engine, comprising a cam mechanism for converting rotational motion of an electric motor into linear motion to drive a valve for opening and closing a cylinder against a valve spring, and a torque reduction mechanism for adding an opposite torque, which serves so as to reduce a torque applied to the cam mechanism from the valve spring at the time of driving the valve, to the cam mechanism.Type: ApplicationFiled: November 16, 2004Publication date: May 12, 2005Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yasushi Kusaka, Toshiaki Asada, Shuichi Ezaki, Kimitoshi Tsuji
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Patent number: 6877470Abstract: In a starting control system for an internal combustion engine, an output shaft is rotated in a reverse direction at a predetermined direction upon start of the internal combustion engine, and then is rotated in a normal direction so as to start a cranking operation. The system serves to combust the fuel in a cylinder in an expansion stroke when the output shaft is rotated in the reverse direction, and the resultant combustion pressure is used for performing the cranking operation. This makes it possible to reduce the load exerted to the electric motor.Type: GrantFiled: September 8, 2003Date of Patent: April 12, 2005Assignee: Toyota Jidosha Kabushiki KaishaInventors: Shinichi Mitani, Toshiaki Asada, Yasushi Kusaka, Kenji Kataoka
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Publication number: 20050028764Abstract: An internal combustion engine 100 comprises a variable valve mechanism 424 and a deposit removal executing section for removing deposits. The deposit removal executing section controls the variable valve mechanism 424 to increase the flow speed of intake air to internal combustion engine 100, thereby removing deposits adhering in proximity to the intake valve 422.Type: ApplicationFiled: June 24, 2004Publication date: February 10, 2005Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shinichi Mitani, Toshiaki Asada
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Publication number: 20050028768Abstract: A valve-driving system for an internal combustion engine is provided with: an electric motor for generating a rotational driving force to drive a valve for intake or exhaust mounted on a cylinder in the internal combustion engine so as to open and close the valve in synchronization with a piston motion in the internal combustion engine; a transmitting device capable of changing between (i) a first condition to transmit therethrough the rotational driving force to the valve from said electric motor and (ii) a second condition to stop an opening or closing operation of the valve or to make the valve driven by a low lift amount; a judging device for judging whether or not synchronization between the opening or closing operation of the valve and the piston motion is abnormal; and a fail-safe device for changing said transmitting device to the second condition if it is judged by the judging device that the synchronization is abnormal.Type: ApplicationFiled: July 23, 2004Publication date: February 10, 2005Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shuichi Ezaki, Toshiaki Asada, Kimitoshi Tsuji, Yasushi Kusaka
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Publication number: 20040118367Abstract: A valve-driving system which is applied to an internal combustion engine having a plurality of cylinders for driving an intake or exhaust valve provided in each cylinder, including a plurality of valve-driving apparatuses provided for driving valves of different cylinders of the internal combustion engine, wherein each valve-driving apparatus includes an electrical motor as a driving source for generating rotation motion; and a power transmission mechanism for converting the rotation motion of the electric motor into opening and closing motion of the valve to be driven and for transmitting the opening and closing motion to the valve through a cam or a link.Type: ApplicationFiled: December 3, 2003Publication date: June 24, 2004Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shuichi Ezaki, Toshiaki Asada, Kimitoshi Tsuji, Yasushi Kusaka, Kenji Kataoka
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Publication number: 20040107926Abstract: A stop control apparatus for an internal combustion engine is provided with a valve mechanism capable of operating at least one of an intake valve and an exhaust valve independently a crankshaft of an internal combustion engine, and a valve controlling device for controlling an operation of the valve mechanism so that the internal combustion engine is stopped in a predetermined state.Type: ApplicationFiled: November 28, 2003Publication date: June 10, 2004Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kenji Kataoka, Toshiaki Asada, Shuichi Ezaki, Kimitoshi Tsuji, Yasushi Kusaka
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Publication number: 20040107928Abstract: A valve-driving system, which is applied to an internal combustion engine having a plurality of cylinders, for driving an intake or exhaust valve provided in each cylinder, comprising: a plurality of valve-driving apparatuses, each of which is provided for at least each one of the intake valve and the exhaust valve, each valve-driving apparatus having an electrical motor as a driving source for generating rotation motion and a power transmission mechanism provided with a transmitting section for transmitting the rotation motion generated by the electrical motor and a converting section for converting the rotation motion transmitted from the transmitting section into opening and closing motion of the valve to be driven; and a motor control device which controls operations of electric motors of the respective valve-driving apparatuses in accordance with the operation state of the internal combustion engine.Type: ApplicationFiled: December 3, 2003Publication date: June 10, 2004Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Toshiaki Asada, Shuichi Ezaki, Kimitoshi Tsuji, Yasushi Kusaka, Kenji Kataoka
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Publication number: 20040060530Abstract: In a starting control system for an internal combustion engine, an output shaft is rotated in a reverse direction at a predetermined direction upon start of the internal combustion engine, and then is rotated in a normal direction so as to start a cranking operation. The system serves to combust the fuel in a cylinder in an expansion stroke when the output shaft is rotated in the reverse direction, and the resultant combustion pressure is used for performing the cranking operation. This makes it possible to reduce the load exerted to the electric motor.Type: ApplicationFiled: September 8, 2003Publication date: April 1, 2004Applicant: Toyota Jidosha Kabushiki KaishaInventors: Shinichi Mitani, Toshiaki Asada, Yasushi Kusaka, Kenji Kataoka
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Publication number: 20040045283Abstract: A valve train system for operating an intake valve of an internal combustion engine, in which an operation amount of the intake valve is controlled. When it is determined that there is a need of improving a fuel efficiency by increasing the compression ratio within the combustion chamber on the basis of an engine operating state, an exhaust valve is opened and subsequently closed after an intake stroke until the pressure within the exhaust chamber becomes equal to the pressure within the exhaust passage so as to increase the compression ratio within the exhaust valve.Type: ApplicationFiled: August 21, 2003Publication date: March 11, 2004Applicant: Toyota Jidosha Kabushiki KaishaInventor: Toshiaki Asada
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Publication number: 20020104520Abstract: A control apparatus calculates a exhaust gas air-fuel ratio of a plurality of cylinders, in which the operation angle of an intake valve is set to a predetermined operation angle, e.g., a maximum operation angle, based on a value output from an air-fuel ratio sensor so as to minimize a variation in an fuel injection quantity between the plurality of cylinders by that exhaust gas air-fuel ratio. That is, the exhaust gas air-fuel ratio of the plurality of cylinders, in which the valve opening characteristics of the intake valve and an exhaust valve are set such that the intake air amount to be introduced into the plurality of cylinders is limited by the opening amount of a throttle valve, for example, and not limited by the valve opening characteristics of the intake valve or the exhaust valve is calculated, and the variation in the fuel injection quantity among the plurality of cylinders is then reduced by that exhaust gas air-fuel ratio.Type: ApplicationFiled: January 30, 2002Publication date: August 8, 2002Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yukihiro Nakasaka, Toshiaki Asada, Naohide Fuwa, Shinji Sadakane
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Patent number: 6293246Abstract: An engine comprising a spark plug and a fuel injector in a combustion chamber and a temperature sensor used to judge if the gas temperature in the combustion chamber is a temperature at which self-ignition occurs when a spark is generated. Based on this judgement, a valve timing device is used to control the opening timing of the intake valve and maintain the gas temperature at a temperature at which self-ignition occurs when a spark is generated.Type: GrantFiled: January 28, 1999Date of Patent: September 25, 2001Assignee: Toyota Jidosha Kabushiki KaishaInventors: Toshio Tanahashi, Toshimi Murai, Yushiro Yasuda, Toshiaki Asada
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Patent number: 6100112Abstract: A bump-attached tape carrier for mounting a semiconductor chip on a circuit substrate, the bump-attached tape carrier comprising, an insulating film, a conductor pattern formed on the insulating film, and metal bumps formed on the conductor pattern and adapted to be bonded with the semiconductor chip, wherein the metal bumps are respectively formed of a columnar body having a side wall substantially perpendicular to the conductor pattern.Type: GrantFiled: October 6, 1998Date of Patent: August 8, 2000Assignee: The Furukawa Electric Co., Ltd.Inventors: Toshiaki Amano, Toshiaki Asada, Masakazu Hamada