Patents by Inventor Seiichirou Nishikawa
Seiichirou Nishikawa 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: 7269499Abstract: An engine stopping and starting control device predicts which cylinder will be on a compression stroke upon being stopped during a process for stopping the engine. Fuel is injected into the predicted cylinder during the process for stopping the engine to seal an air-fuel mixture therein. The same cylinder is then fired upon the next start cycle to generate a first explosion to start the engine.Type: GrantFiled: April 7, 2005Date of Patent: September 11, 2007Assignee: Denso CorporationInventors: Yoshifumi Murakami, Seiichirou Nishikawa
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Patent number: 7177755Abstract: A control apparatus for an engine increases an intake air quantity just before engine stop to increase a compression pressure in a compression stroke. As the compression pressure is increased, a negative torque in the compression stroke increases and obstructs engine rotation, and brakes the engine rotation. Thus, a range of crank angle, in which torque is below engine friction, that is, in which engine rotation can be stopped, is reduced. As a result, variation in engine rotation stop position is reduced to be within a small range of crank angle. Information of engine rotation stop position is stored, and the stored information of engine rotation stop position is used at the start of an engine to accurately determine an initial injection cylinder and an initial ignition cylinder to start the engine.Type: GrantFiled: February 6, 2006Date of Patent: February 13, 2007Assignee: Denso CorporationInventors: Seiichirou Nishikawa, Yoshifumi Murakami
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Patent number: 7066128Abstract: During a shut-down period of an engine based on an idle stop control, a computer estimates a power stroke cylinder and a compression stroke cylinder when the engine is stopped. A fuel is injected into the power stroke cylinder and the compression stroke cylinder in an intake stroke just before the engine is stopped. An air-fuel mixture is hold in each cylinder with the engine stopped. When an auto start is required while the engine is stopped, a spark ignition is performed in the power stroke cylinder to start cranking of the engine by combustion energy. At nest ignition timing, a spark ignition is performed in the compression stroke cylinder to start the engine without an aid of a starter.Type: GrantFiled: July 15, 2005Date of Patent: June 27, 2006Assignee: Denso CorporationInventors: Nobuyuki Satake, Seiichirou Nishikawa, Yoshifumi Murakami
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Publication number: 20060129305Abstract: A control apparatus for an engine increases an intake air quantity just before engine stop to increase a compression pressure in a compression stroke. As the compression pressure is increased, a negative torque in the compression stroke increases and obstructs engine rotation, and brakes the engine rotation. Thus, a range of crank angle, in which torque is below engine friction, that is, in which engine rotation can be stopped, is reduced. As a result, variation in engine rotation stop position is reduced to be within a small range of crank angle. Information of engine rotation stop position is stored, and the stored information of engine rotation stop position is used at the start of an engine to accurately determine an initial injection cylinder and an initial ignition cylinder to start the engine.Type: ApplicationFiled: February 6, 2006Publication date: June 15, 2006Applicant: Denso CorporationInventors: Seiichirou Nishikawa, Yoshifumi Murakami
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Patent number: 7027911Abstract: A control apparatus for an engine increases an intake air quantity just before engine stop to increase a compression pressure in a compression stroke. As the compression pressure is increased, a negative torque in the compression stroke increases and obstructs engine rotation, and brakes the engine rotation. Thus, a range of crank angle, in which torque is below engine friction, that is, in which engine rotation can be stopped, is reduced. As a result, variation in engine rotation stop position is reduced to be within a small range of crank angle. Information of engine rotation stop position is stored, and the stored information of engine rotation stop position is used at the start of an engine to accurately determine an initial injection cylinder and an initial ignition cylinder to start the engine.Type: GrantFiled: January 22, 2004Date of Patent: April 11, 2006Assignee: Denso CorporationInventors: Seiichirou Nishikawa, Yoshifumi Murakami
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Publication number: 20060016413Abstract: During a shut-down period of an engine based on an idle stop control, a computer estimates a power stroke cylinder and a compression stroke cylinder when the engine is stopped. A fuel is injected into the power stroke cylinder and the compression stroke cylinder in an intake stroke just before the engine is stopped. An air-fuel mixture is hold in each cylinder with the engine stopped. When an auto start is required while the engine is stopped, a spark ignition is performed in the power stroke cylinder to start cranking of the engine by combustion energy. At nest ignition timing, a spark ignition is performed in the compression stroke cylinder to start the engine without an aid of a starter.Type: ApplicationFiled: July 15, 2005Publication date: January 26, 2006Applicant: Denso CorporationInventors: Nobuyuki Satake, Seiichirou Nishikawa, Yoshifumi Murakami
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Publication number: 20050228575Abstract: An engine stopping and starting control device includes a prediction means, a control means, and a start control means. The prediction means predicts a cylinder on a compression stroke upon a stop during a process for stopping an engine. The control means controls a fuel injection upon a stop that injects fuel into the cylinder during the process for stopping the engine to seal an air-fuel mixture therein. The start control means fires the cylinder to generate a first explosion to start the engine.Type: ApplicationFiled: April 7, 2005Publication date: October 13, 2005Applicant: DENSO CORPORATIONInventors: Yoshifumi Murakami, Seiichirou Nishikawa
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Publication number: 20040149251Abstract: A control apparatus for an engine increases an intake air quantity just before engine stop to increase a compression pressure in a compression stroke. As the compression pressure is increased, a negative torque in the compression stroke increases and obstructs engine rotation, and brakes the engine rotation. Thus, a range of crank angle, in which torque is below engine friction, that is, in which engine rotation can be stopped, is reduced. As a result, variation in engine rotation stop position is reduced to be within a small range of crank angle. Information of engine rotation stop position is stored, and the stored information of engine rotation stop position is used at the start of an engine to accurately determine an initial injection cylinder and an initial ignition cylinder to start the engine.Type: ApplicationFiled: January 22, 2004Publication date: August 5, 2004Applicant: DENSO CORPORATIONInventors: Seiichirou Nishikawa, Yoshifumi Murakami
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Patent number: 5035226Abstract: An engine control system comprises a circuit for selecting a first engine controlled variable or a second engine controlled variable according to engine condition, changeover value for introducing to a pressure sensor the atmospheric pressure when the circuit selects the first engine controlled variable and the negative suction pressure when the circuit selects the second engine controlled variable, an engine control circuit for controlling the engine on the basis of a selected engine controlled variable and the atmospheric pressure and a delay circuit for making the selecting circuit to select the second engine controlled variable after a predetermined time period from the time when the pressure to be introduced to the pressure sensor is changed over from the atmospheric pressure to the negative suction pressure.Type: GrantFiled: January 9, 1990Date of Patent: July 30, 1991Assignee: Nippondenso Co., Ltd.Inventors: Seiichirou Nishikawa, Kenichiro Kamai