Patents by Inventor Shigeo Kikori
Shigeo Kikori 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: 7840335Abstract: In a variable compression ratio internal combustion engine in which the compression ratio is changed by changing the combustion chamber volume, the present invention enables to inhibit irregularities in the air-fuel ratio involved by changing of the combustion chamber volume. In a transition period during which the compression ratio is changed, the actual volume of the combustion chamber realized by a compression ratio changing mechanism is detected. A factor that influences the air-fuel ratio (for example, fuel injection quantity, cylinder intake air quantity or amount of EGR) is controlled based on the actual volume of the combustion chamber thus detected to make the air-fuel ratio substantially equal to that before and after the change of the compression ratio.Type: GrantFiled: August 1, 2008Date of Patent: November 23, 2010Assignee: Toyota Jidosha Kabushiki KaishaInventors: Daisuke Akihisa, Eiichi Kamiyama, Shigeo Kikori, Akio Kikori, legal representative
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Publication number: 20080306676Abstract: In a variable compression ratio internal combustion engine in which the compression ratio is changed by changing the combustion chamber volume, the present invention enables to inhibit irregularities in the air-fuel ratio involved by changing of the combustion chamber volume. In a transition period during which the compression ratio is changed, the actual volume of the combustion chamber realized by a compression ratio changing mechanism is detected. A factor that influences the air-fuel ratio (for example, fuel injection quantity, cylinder intake air quantity or amount of EGR) is controlled based on the actual volume of the combustion chamber thus detected to make the air-fuel ratio substantially equal to that before and after the change of the compression ratio.Type: ApplicationFiled: August 1, 2008Publication date: December 11, 2008Applicant: Toyota Jidosha Kabushiki KaishaInventors: Daisuke Akihisa, Eiichi Kamiyama, Shigeo Kikori, Akio Kikori
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Patent number: 7422004Abstract: In a variable compression ratio internal combustion engine in which the compression ratio is changed by changing the combustion chamber volume, the present invention enables to inhibit irregularities in the air-fuel ratio involved by changing of the combustion chamber volume. In a transition period during which the compression ratio is changed, the actual volume of the combustion chamber realized by a compression ratio changing mechanism is detected. A factor that influences the air-fuel ratio (for example, fuel injection quantity, cylinder intake air quantity or amount of EGR) is controlled based on the actual volume of the combustion chamber thus detected to make the air-fuel ratio substantially equal to that before and after the change of the compression ratio.Type: GrantFiled: November 4, 2005Date of Patent: September 9, 2008Assignee: Toyota Jidosha Kabushiki KaishaInventors: Daisuke Akihisa, Eiichi Kamiyama, Akio Kikori, legal representative, Shigeo Kikori
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Patent number: 7028652Abstract: A device for controlling an internal combustion engine with a variable valve timing system is provided. While the piston descends just after the combustion in the cylinder, the intake valve is opened by the variable valve system for the intake valve such that the intake air is supplied into the cylinder from the engine intake system.Type: GrantFiled: October 30, 2003Date of Patent: April 18, 2006Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yoshihiro Iwashita, Shigeo Kikori, Kazuhiko Shiratani, Shouji Katsumata, Keiji Yoeda, Makoto Ogiso, Hideyuki Nishida, Tomomi Yamada
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Publication number: 20060070605Abstract: In a variable compression ratio internal combustion engine in which the compression ratio is changed by changing the combustion chamber volume, the present invention enables to inhibit irregularities in the air-fuel ratio involved by changing of the combustion chamber volume. In a transition period during which the compression ratio is changed, the actual volume of the combustion chamber realized by a compression ratio changing mechanism is detected. A factor that influences the air-fuel ratio (for example, fuel injection quantity, cylinder intake air quantity or amount of EGR) is controlled based on the actual volume of the combustion chamber thus detected to make the air-fuel ratio substantially equal to that before and after the change of the compression ratio.Type: ApplicationFiled: November 4, 2005Publication date: April 6, 2006Applicant: Toyota Jidosha Kabushiki KaishaInventors: Daisuke Akihisa, Eiichi Kamiyama, Akio Kikori, Shigeo Kikori
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Patent number: 6997146Abstract: In method and apparatus for controlling starting of a solenoid-operated valve for an internal combustion engine, when a request for a start of the solenoid-operated valve is generated, a provisional target position to which an armature is likely to be moved is determined, and the armature is moved to the determined provisional target position. If the provisional target position is difference from a predetermined target position, the armature is moved to the target position after being moved from the neutral position to the provisional target position.Type: GrantFiled: April 28, 2003Date of Patent: February 14, 2006Assignee: Toyota Jidosha Kabushiki KaishaInventors: Keiji Yoeda, Shigeo Kikori, Tomohiro Oda, Hitoshi Akimoto
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Patent number: 6932054Abstract: A target intake air mass and a target compression ratio are determined according to the operating condition of an internal combustion engine. A variable compression ratio mechanism is controlled according to the target compression ratio. During this process, a knock limit intake air mass is determined from the actual compression ratio attained by the variable compression ratio mechanism, the smaller one of the knock limit intake air mass and the target intake air mass is set as the final target intake air mass and a variable valve timing mechanism is controlled according to the final target intake air mass.Type: GrantFiled: September 24, 2004Date of Patent: August 23, 2005Assignee: Toyota Jidosha Kabushiki KaishaInventor: Shigeo Kikori
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Publication number: 20050087155Abstract: A target intake air mass and a target compression ratio are determined according to the operating condition of an internal combustion engine. A variable compression ratio mechanism is controlled according to the target compression ratio. During this process, a knock limit intake air mass is determined from the actual compression ratio attained by the variable compression ratio mechanism, the smaller one of the knock limit intake air mass and the target intake air mass is set as the final target intake air mass and a variable valve timing mechanism is controlled according to the final target intake air mass.Type: ApplicationFiled: September 24, 2004Publication date: April 28, 2005Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Shigeo Kikori
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Publication number: 20040089250Abstract: A device for controlling an internal combustion engine with a variable valve timing system is provided. While the piston descends just after the combustion in the cylinder, the intake valve is opened by the variable valve system for the intake valve such that the intake air is supplied into the cylinder from the engine intake system.Type: ApplicationFiled: October 30, 2003Publication date: May 13, 2004Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoshihiro Iwashita, Shigeo Kikori, Kazuhiko Shiratani, Shouji Katsumata, Keiji Yoeda, Makoto Ogiso, Hideyuki Nishida, Tomomi Yamada
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Publication number: 20030217714Abstract: In method and apparatus for controlling starting of a solenoid-operated valve for an internal combustion engine, when a request for a start of the solenoid-operated valve is generated, a provisional target position to which an armature is likely to be moved is determined, and the armature is moved to the determined provisional target position. If the provisional target position is difference from a predetermined target position, the armature is moved to the target position after being moved from the neutral position to the provisional target position.Type: ApplicationFiled: April 28, 2003Publication date: November 27, 2003Applicant: Toyota Jidosha Kabushiki KaishaInventors: Keiji Yoeda, Shigeo Kikori, Tomohiro Oda, Hitoshi Akimoto
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Patent number: 6058349Abstract: The accelerator opening degree detection apparatus of the present invention includes: an accelerator pedal position sensor for detecting a position of an accelerator pedal; and a calculating section for calculating an accelerator opening degree based on an output of the accelerator pedal position sensor.Type: GrantFiled: November 20, 1997Date of Patent: May 2, 2000Assignee: Toyota Jidosha Kabushiki Kaisha & Denso Corp.Inventors: Shigeo Kikori, Osamu Fukasawa, Hiroshi Mizuno, Katsuyuki Kawai, Mitsuru Takada
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Patent number: 6029513Abstract: An apparatus for controlling an opening of a throttle valve to adjust an amount of air flow led into an internal combustion engine mounted on a vehicle. A depression sensor detects the degree of depression of an accelerator pedal. An electric component is provided for electrically adjusting the opening of the throttle valve based on the depression of the gas pedal. A mechanical component is provided for adjusting the opening of the throttle valve in response to the depression of the accelerator pedal. The mechanical component is rendered operable when the electric component fails to control the opening of the throttle valve. An electric control unit (ECU) prohibits the electric component from resuming control of the throttle valve until a certain condition is met, such as stoppage of the engine or the entire vehicle, even if the electric component is capable of controlling the throttle valve.Type: GrantFiled: October 20, 1997Date of Patent: February 29, 2000Assignee: Toyota Jidosha Kabushiki KaishaInventors: Shigeo Kikori, Mitsuru Takada
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Patent number: 6014955Abstract: An air-amount-first fuel-amount-second control apparatus for an internal combustion engine having an electronically-controlled throttle valve. The response characteristic of the throttle valve is stored, a target value of the throttle valve opening degree corresponding to the operating position of the accelerator pedal is calculated, the intake air valve closing time of the fuel injection cylinder is calculated in accordance with the engine operating condition, the time required for reaching a target throttle valve opening degree is calculated from the target throttle valve opening degree and the stored value of the response characteristic of the throttle valve, the throttle valve opening degree as of the intake air valve closing time is calculated from the calculated time required for reaching the target throttle valve opening degree and the intake air valve closing time of the fuel injection cylinder.Type: GrantFiled: September 17, 1997Date of Patent: January 18, 2000Assignee: Toyota Jidosha Kabushiki KaishaInventors: Ichiro Hosotani, Hiroshi Tanaka, Naohide Fuwa, Iwao Maeda, Shigeo Kikori, Ken Kuretake
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Electronic throttle control having throttle sensor failure detecting function and fail-safe function
Patent number: 5950597Abstract: In an electronic throttle control for an engine, two throttle sensors are used to detect a throttle opening. When a sensor failure is detected in either of those throttle sensors, a feedback control is executed according to the output of the other normal sensor if any. If both throttle sensors fail or it cannot be determined whether there is any normal sensor, the feedback is stopped and the feedback variables are initialized and a motor control duty is set to -30% or 0% according to the existing accelerator depression. Thereafter, if the throttle sensors are not restored even after a preset determination delay time is over, an electromagnetic clutch and a DC motor are turned off to stop the electronic throttle control. A throttle valve is controlled mechanically for a limp-home running.Type: GrantFiled: February 19, 1998Date of Patent: September 14, 1999Assignees: Denso Corporation, Toyota Jidosha Kabushiki KaishaInventors: Shigeru Kamio, Shigeo Kikori -
Patent number: 5921886Abstract: In an automatic transmission, torque shocks are effectively reduced in specific downshifting conditions where relatively strong engine braking occurs as a result of downshifting. When a downshift command to the automatic transmission is detected when an accelerator pedal is not depressed, a valve opening command is issued to a throttle valve so that engine output will have increased by the time the downshifting action of the automatic transmission actually begins, ignition timing is delayed so that an increase in engine output resulting from the opening of the throttle valve by a throttle valve control means is offset for a period starting at the time the engine output actually increases as a result of the opening of the throttle valve by the throttle valve control means and ending at the time the downshifting action of the automatic transmission actually beings, and the ignition timing delaying is cancelled upon initiation of the downshifting action of the automatic transmission.Type: GrantFiled: July 3, 1997Date of Patent: July 13, 1999Assignee: Toyota Jidosha Kabushiki KaishaInventors: Mitsuru Takada, Shigeo Kikori, Noboru Takagi, Hideo Tomomatsu, Kunihiro Iwatsuki, Takashi Ohta
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Patent number: 5906185Abstract: A throttle valve controller achieves high output response to the smaller deviation of the actual opening from the demand opening of the throttle valve and achieves high control stability against the larger deviation. It has a preset data table containing proportional gain values and integral gain values of PID control in correspondence to deviation values in inversely proportional arrangement. During the transitional state of control system, a pair of provisional gain values are read out of the table in response to the deviation value: (step S3), these gain values are compared with those of the previous operation cycle and the smaller gain value pair are selected: (steps S4-S7), and the valve drive signal is calculated from the selected gain values:(steps S8, S11). Consequently, the controller achieves high output response to the smaller deviation due to the larger gain value and high control stability without the overshooting of valve movement against the larger deviation due to the smaller gain value.Type: GrantFiled: December 8, 1997Date of Patent: May 25, 1999Assignee: Aisan Kogyo Kabushiki KaishaInventors: Katsumi Ishida, Hiroshi Takamatsu, Hiroyuki Makisako, Takamasa Kitamura, Shigeo Kikori