Patents by Inventor Yoshiyuki Ootake
Yoshiyuki Ootake 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: 8607545Abstract: An air-fuel ratio control device is provided for controlling the air-fuel ratio of an engine. The device includes an exhaust passage having a main catalytic converter and a bypass passage having a bypass catalytic converter, the bypass passage diverging from the exhaust passage at an upstream junction and rejoining the exhaust passage at a downstream junction. A valve mechanism disposed in the exhaust passage between the upstream junction and the downstream junction moves between a closed state and an open state. During a predetermined period of time after the valve mechanism opens to permit flow in the exhaust passage, the air-fuel ratio of the engine is controlled based on a signal from a first air-fuel ratio sensor in the bypass passage using a low response correction value that is less than a normal response correction value that would be used when the valve mechanism is closed.Type: GrantFiled: January 24, 2012Date of Patent: December 17, 2013Assignee: Nissan Motor Co., Ltd.Inventors: Yoshiyuki Ootake, Yasuji Ishizuka, Masaki Koga
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Patent number: 8606446Abstract: A control system of a hybrid vehicle, includes: an engine; a motor capable of driving the engine; an oil pump for supplying a lubricant oil to a lubrication requiring portion of the engine; and an engine lubrication controller configured to make the following operations in a case that a stop state of the engine continues for more than or equal to a certain period: when a vehicle stop condition that a driver has no intention of travel is established, supplying, by the oil pump, the lubricant oil to the lubrication requiring portion of the engine, and rotating the engine by the motor without igniting the engine, thereby implementing an engine lubrication control.Type: GrantFiled: February 24, 2011Date of Patent: December 10, 2013Assignee: Nissan Motor Co., Ltd.Inventors: Takao Ito, Yoshiyuki Ootake, Masaki Koga, Tetsuya Iwasaki, Takashi Ogino, Yasuhiro Konishi, Tomoyuki Koike
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Publication number: 20120117950Abstract: An air-fuel ratio control device is provided for controlling the air-fuel ratio of an engine. The device includes an exhaust passage having a main catalytic converter and a bypass passage having a bypass catalytic converter, the bypass passage diverging from the exhaust passage at an upstream junction and rejoining the exhaust passage at a downstream junction. A valve mechanism disposed in the exhaust passage between the upstream junction and the downstream junction moves between a closed state and an open state. During a predetermined period of time after the valve mechanism opens to permit flow in the exhaust passage, the air-fuel ratio of the engine is controlled based on a signal from a first air-fuel ratio sensor in the bypass passage using a low response correction value that is less than a normal response correction value that would be used when the valve mechanism is closed.Type: ApplicationFiled: January 24, 2012Publication date: May 17, 2012Applicant: NISSAN MOTOR CO., LTD.Inventors: Yoshiyuki Ootake, Yasuji Ishizuka, Masaki Koga
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Patent number: 8176728Abstract: An air-fuel ratio control device is provided for controlling the air-fuel ratio of an engine. The device includes an exhaust passage having a main catalytic converter and a bypass passage having a bypass catalytic converter, the bypass passage diverging from the exhaust passage at an upstream junction and rejoining the exhaust passage at a downstream junction. A valve mechanism disposed in the exhaust passage between the upstream junction and the downstream junction moves between a closed state and an open state. During a predetermined period of time after the valve mechanism opens to permit flow in the exhaust passage, the air-fuel ratio of the engine is controlled based on a signal from a first air-fuel ratio sensor in the bypass passage using a low response correction value that is less than a normal response correction value that would be used when the valve mechanism is closed.Type: GrantFiled: July 31, 2008Date of Patent: May 15, 2012Assignee: Nissan Motor Co., Ltd.Inventors: Yoshiyuki Ootake, Yasuji Ishizuka, Masaki Koga
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Patent number: 8141343Abstract: An air-fuel ratio control apparatus is basically provided with an exhaust system, a pair of sensors and a controller. The exhaust system includes an exhaust channel having a main catalytic converter, a bypass channel having a bypass catalytic converter, and a valve mechanism disposed in the exhaust channel to switch a pathway for exhaust gas from the exhaust channel to the bypass channel. The sensors output signals indicative of air-fuel ratios of exhaust flowing in their respective channels. The controller has first and second air-fuel ratio control sections that control an engine air-fuel ratio based on outputs of the sensors, respectively. The controller has a control mode switching section that switches control from the first air-fuel ratio control section to the second air-fuel ratio control section after a prescribed interval of time has elapsed from when the valve mechanism is switched from a closed state to an open state.Type: GrantFiled: December 20, 2007Date of Patent: March 27, 2012Assignee: Nissan Motor Co., Ltd.Inventors: Hiroyuki Nagai, Yoshiyuki Ootake, Yasuji Ishizuka, Masaki Koga
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Publication number: 20110213521Abstract: A control system of a hybrid vehicle, includes: an engine; a motor capable of driving the engine; an oil pump for supplying a lubricant oil to a lubrication requiring portion of the engine; and an engine lubrication controller configured to make the following operations in a case that a stop state of the engine continues for more than or equal to a certain period: when a vehicle stop condition that a driver has no intention of travel is established, supplying, by the oil pump, the lubricant oil to the lubrication requiring portion of the engine, and rotating the engine by the motor without igniting the engine, thereby implementing an engine lubrication control.Type: ApplicationFiled: February 24, 2011Publication date: September 1, 2011Inventors: Takao ITO, Yoshiyuki Ootake, Masaki Koga, Tetsuya Iwasaki, Takashi Ogino, Yasuhiro Konishi, Tomoyuki Koike, Hiroyuki Suzuki
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Patent number: 7536999Abstract: An air-fuel ratio control apparatus is basically provided with an exhaust system, a first sensor and a controller. The exhaust system includes an exhaust channel with a main catalytic converter disposed therein, a bypass channel with a bypass catalytic converter disposed therein, and a valve mechanism disposed in the exhaust channel between the connection points of the exhaust channel to switch a pathway for exhaust gas from the exhaust channel to the bypass channel. The first sensor detects a property indicative of an air-fuel ratio of exhaust flowing in the exhaust channel at a point downstream of the valve mechanism. The controller adjusts an element temperature of the first sensor to a prescribed temperature or less during a prescribed interval of time from when the valve mechanism is switched from a closed state to an open state.Type: GrantFiled: December 20, 2007Date of Patent: May 26, 2009Assignee: Nissan Motor Co., Ltd.Inventors: Yoshiyuki Ootake, Yasuji Ishizuka, Masaki Koga, Kenichi Sato
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Publication number: 20090043481Abstract: An air-fuel ratio control device is provided for controlling the air-fuel ratio of an engine. The device includes an exhaust passage having a main catalytic converter and a bypass passage having a bypass catalytic converter, the bypass passage diverging from the exhaust passage at an upstream junction and rejoining the exhaust passage at a downstream junction. A valve mechanism disposed in the exhaust passage between the upstream junction and the downstream junction moves between a closed state and an open state. During a predetermined period of time after the valve mechanism opens to permit flow in the exhaust passage, the air-fuel ratio of the engine is controlled based on a signal from a first air-fuel ratio sensor in the bypass passage using a low response correction value that is less than a normal response correction value that would be used when the valve mechanism is closed.Type: ApplicationFiled: July 31, 2008Publication date: February 12, 2009Applicant: NISSAN MOTOR CO., LTD.Inventors: Yoshiyuki OOTAKE, Yasuji Ishizuka, Masaki Koga
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Publication number: 20080172166Abstract: An air-fuel ratio control apparatus is basically provided with an exhaust system, a pair of sensors and a controller. The exhaust system includes an exhaust channel having a main catalytic converter, a bypass channel having a bypass catalytic converter, and a valve mechanism disposed in the exhaust channel to switch a pathway for exhaust gas from the exhaust channel to the bypass channel. The sensors output signals indicative of air-fuel ratios of exhaust flowing in their respective channels. The controller has first and second air-fuel ratio control sections that control an engine air-fuel ratio based on outputs of the sensors, respectively. The controller has a control mode switching section that switches control from the first air-fuel ratio control section to the second air-fuel ratio control section after a prescribed interval of time has elapsed from when the valve mechanism is switched from a closed state to an open state.Type: ApplicationFiled: December 20, 2007Publication date: July 17, 2008Applicant: NISSAN MOTOR CO., LTD.Inventors: Hiroyuki NAGAI, Yoshiyuki OOTAKE, Yasuji ISHIZUKA, Masaki KOGA
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Publication number: 20080172167Abstract: An air-fuel ratio control apparatus is basically provided with an exhaust system, a first sensor and a controller. The exhaust system includes an exhaust channel with a main catalytic converter disposed therein, a bypass channel with a bypass catalytic converter disposed therein, and a valve mechanism disposed in the exhaust channel between the connection points of the exhaust channel to switch a pathway for exhaust gas from the exhaust channel to the bypass channel. The first sensor detects a property indicative of an air-fuel ratio of exhaust flowing in the exhaust channel at a point downstream of the valve mechanism. The controller adjusts an element temperature of the first sensor to a prescribed temperature or less during a prescribed interval of time from when the valve mechanism is switched from a closed state to an open state.Type: ApplicationFiled: December 20, 2007Publication date: July 17, 2008Applicant: NISSAN MOTOR CO., LTD.Inventors: Yoshiyuki OOTAKE, Yasuji ISHIZUKA, Masaki KOGA, Kenichi SATO