Patents by Inventor Akira Eiraku
Akira Eiraku 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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Publication number: 20110225968Abstract: An object of this invention is to prevent a diaphragm of an actuator from being damaged by a high temperature, and improve a heat resistance property of the actuator. A valve actuator includes a communication hole that allows communication between a high pressure chamber and a low pressure chamber that are separated by a diaphragm, and a normally closed reed valve that opens and closes the communication hole. When a temperature of the valve actuator is less than a pressure release temperature, an ECU changes a differential pressure between the high pressure chamber and low pressure chamber by means of a pressure regulating valve, to control the valve actuator. This control is executed within a range of differential pressures at which the reed valve does not open. If the temperature exceeds the pressure release temperature, a differential pressure at which the reed valve opens is realized by the pressure regulating valve.Type: ApplicationFiled: February 24, 2010Publication date: September 22, 2011Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Akira Eiraku
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Publication number: 20110213539Abstract: Disclosed is an internal combustion engine control device that is capable of accurately estimating a turbine flow rate during a transient operation of an internal combustion engine with a turbocharger having a WGV. Steps are performed to acquire an exhaust gas flow rate mcyl (=mB), a WGV opening WG (=X), and a turbine rotation speed Ntb (=Na) during the transient operation of the internal combustion engine. Steps are then performed to calculate the turbine flow rate (=mtA) and exhaust gas flow rate mcyl (=mA), which prevail when the turbine rotation speed Ntb and WGV opening WG acquired during the transient operation are achieved during a steady operation. Next, a step is performed to calculate the turbine flow rate (=mtB) during the transient operation by applying the flow rate ratio of mtA to mA to the exhaust gas flow rate mcyl during the transient operation.Type: ApplicationFiled: February 26, 2010Publication date: September 1, 2011Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Akira Eiraku
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Patent number: 7991536Abstract: A control system for an internal combustion engine equipped with a supercharger calculates a target intake mass airflow (mt?) in accordance with an accelerator pedal travel (?A), using a virtual internal combustion engine model having a virtual upstream intake air pressure (PA). The control system then calculates a target throttle opening (?) in accordance with a measured upstream intake pressure (PIN) so as to provide the target intake mass airflow (mt?), and controls a throttle valve based on the target throttle opening (?).Type: GrantFiled: August 14, 2006Date of Patent: August 2, 2011Assignee: Toyota Jidosha Kabushiki KaishaInventor: Akira Eiraku
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Publication number: 20110172898Abstract: A device with models constructed based on thermodynamics laws and fluid dynamics laws including the energy conservation law, momentum conservation law and mass conservation law. Compressor outflow flow rate calculation section calculates the flow rate of air that flows out of a compressor based on a relationship between an in-cylinder intake air flow rate during steady-state operation in an internal combustion engine system and supercharging pressure, which is pressure of air compressed by the compressor, and a value of the in-cylinder intake air flow rate calculated by in-cylinder intake air flow rate calculation section.Type: ApplicationFiled: August 31, 2009Publication date: July 14, 2011Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Akira Eiraku, Machiko Katsumata
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Patent number: 7957886Abstract: A compressor flow rate is calculated using a compressor model, which is the physical model of a compressor. A plurality of the compressor models are provided, and the compressor model used for calculating the compressor flow rate is changed in accordance with an operational condition of an internal combustion engine.Type: GrantFiled: October 11, 2007Date of Patent: June 7, 2011Assignee: Toyota Jidosha Kabushiki KaishaInventors: Akira Eiraku, Hiroshi Yamashita
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Patent number: 7912599Abstract: An internal combustion engine control apparatus includes: a fuel injector; a cooling fan of a radiator that radiates the heat of coolant in a coolant passage in the internal combustion engine; a flow rate control mechanism that variably controls the flow rate of the coolant; an abnormality detector that detects an abnormality of the cooling fan; and a controller that controls the amount of fuel injected from the fuel injector to the internal combustion engine and the operation of the flow rate control mechanism in accordance with the result of the abnormality detector.Type: GrantFiled: January 28, 2008Date of Patent: March 22, 2011Assignees: Toyota Jidosha Kabushiki Kaisha, Denso CorporationInventors: Akira Eiraku, Naoki Kokubo
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Patent number: 7856305Abstract: A control system for an internal combustion engine calculates a provisional target value of the throttle opening in accordance with an accelerator pedal travel, upon detection of a sudden operation of the accelerator pedal. The system also calculates a target pressure change in the surge tank according to the provisional target value, on the basis of the actual surge tank pressure and the cylinder intake mass airflow, using a virtual intake system model. The control system sets a target throttle opening in accordance with the surge tank pressure and the cylinder intake mass airflow, so as to provide the target pressure change under a condition of the actual surge tank volume.Type: GrantFiled: August 14, 2006Date of Patent: December 21, 2010Assignee: Toyota Jidosha Kabushiki KaishaInventor: Akira Eiraku
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Patent number: 7748216Abstract: A turbine of a turbocharger is disposed on an exhaust passage. An air-fuel ratio sensor is disposed downstream of and in proximity to the turbine. An element of the air-fuel ratio sensor is positioned on or near the axis of an exhaust port of the turbine. A whirling flow of an exhaust gas in the same direction as a turbine wheel rotates is produced immediately after the exhaust port of the turbine, so that the whirling flow of the exhaust gas can centrifuge condensed water in the exhaust gas. The exhaust gas contacts the element near the axis of the exhaust port where there is substantially no condensed water, thus preventing the element from being wetted with water or cracked.Type: GrantFiled: April 27, 2007Date of Patent: July 6, 2010Assignees: Toyota Jidosha Kabushiki Kaisha, Denso CorporationInventors: Akira Eiraku, Naoki Kokubo
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Publication number: 20100126449Abstract: A control system of an internal combustion engine changing an operating timing of a valve in an internal combustion engine where a valve drive cam (13) and a pump drive cam (150) are both provided on a valve camshaft (1) is provided. That control system has a device inhibiting the operating timing from being returned in a direction reverse to the direction of the target operating timing during change of the operating timing. Further, in the control system, the relative rotational phases of the valve drive cam and the pump drive cam are set considering utilization of the composite reaction torque of the valve operation drive reaction torque and the fuel pump drive reaction torque acting on the valve camshaft for changing the operating timing in the direction of the target operating timing.Type: ApplicationFiled: March 31, 2008Publication date: May 27, 2010Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATIONInventors: Akira Eiraku, Jouji Yamaguchi
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Publication number: 20090259386Abstract: A compressor flow rate is calculated using a compressor model, which is the physical model of a compressor. A plurality of the compressor models are provided, and the compressor model used for calculating the compressor flow rate is changed in accordance with an operational condition of an internal combustion engine.Type: ApplicationFiled: October 11, 2007Publication date: October 15, 2009Applicant: TOYOTO JIDOSHA KABUSHIKI KAISHAInventors: Akira Eiraku, Hiroshi Yamashita
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Publication number: 20090250037Abstract: A control system for an internal combustion engine calculates a provisional target value of the throttle opening in accordance with an accelerator pedal travel, upon detection of a sudden operation of the accelerator pedal. The system also calculates a target pressure change in the surge tank according to the provisional target value, on the basis of the actual surge tank pressure and the cylinder intake mass airflow, using a virtual intake system model. The control system sets a target throttle opening in accordance with the surge tank pressure and the cylinder intake mass airflow, so as to provide the target pressure change under a condition of the actual surge tank volume.Type: ApplicationFiled: August 14, 2006Publication date: October 8, 2009Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Akira Eiraku
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Patent number: 7562527Abstract: In an internal combustion engine with a supercharger, there is provided a technique capable of quickly raising supercharging pressure. In the internal combustion engine with a supercharger which includes a communication passage 6 that connects between those portions of an exhaust passage 3 which are upstream and downstream of an exhaust gas turbine 4c of the supercharger 4, and a waste gate valve 7 that is arranged in said communication passage 6 so as to open from an upstream side of said communication passage 6 to a downstream side thereof, provision is made for a drive unit that applies a fixed force directed from the downstream side to the upstream side of said communication passage 6 to said waste gate valve 7. By applying the fixed force to the waste gate valve 7, said waste gate valve 7 is not opened until a differential pressure between the upstream and downstream sides of the waste gate valve 7 becomes larger than the fixed force, so the supercharging pressure rises smoothly.Type: GrantFiled: October 7, 2005Date of Patent: July 21, 2009Assignee: Toyota Jidosha Kabushiki KaishaInventor: Akira Eiraku
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Publication number: 20080201034Abstract: An internal combustion engine control apparatus includes: a fuel injector; a cooling fan of a radiator that radiates the heat of coolant in a coolant passage in the internal combustion engine; a flow rate control mechanism that variably controls the flow rate of the coolant; an abnormality detector that detects an abnormality of the cooling fan; and a controller that controls the amount of fuel injected from the fuel injector to the internal combustion engine and the operation of the flow rate control mechanism in accordance with the result of the abnormality detector.Type: ApplicationFiled: January 28, 2008Publication date: August 21, 2008Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATIONInventors: Akira EIRAKU, Naoki KOKUBO
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Publication number: 20080163623Abstract: A turbine of a turbocharger is disposed on an exhaust passage. An air-fuel ratio sensor is disposed downstream of and in proximity to the turbine. An element of the air-fuel ratio sensor is positioned on or near the axis of an exhaust port of the turbine. A whirling flow of an exhaust gas in the same direction as a turbine wheel rotates is produced immediately after the exhaust port of the turbine, so that the whirling flow of the exhaust gas can centrifuge condensed water in the exhaust gas. The exhaust gas contacts the element near the axis of the exhaust port where there is substantially no condensed water, thus preventing the element from being wetted with water or cracked.Type: ApplicationFiled: April 27, 2007Publication date: July 10, 2008Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATIONInventors: Akira Eiraku, Naoki Kokubo
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Patent number: 7373922Abstract: An apparatus and method for controlling the intake air amount in an internal combustion engine provided with a throttle valve and an intake air amount changing means linked with the same, the intake air amount control apparatus and method of an internal combustion engine finding a target intake air amount mcta based on an accelerator opening degree and engine speed (step 101), determining a target setting Cvta for said intake air amount changing means based on at least said target intake air amount (step 103), and finding a target throttle opening degree ?tta based on model equations creating a model of an engine intake system and expressing the air passing through the engine intake system from said target intake air amount mcta and the target setting Cvta (step 107).Type: GrantFiled: July 30, 2004Date of Patent: May 20, 2008Assignee: Toyota Jidosha Kabushiki KaishaInventors: Harufumi Muto, Yuji Miyanoo, Akira Eiraku, Masashi Hakariya
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Publication number: 20080109145Abstract: A control system for an internal combustion engine equipped with a supercharger calculates a target intake mass airflow (mt?) in accordance with an accelerator pedal travel (?A), using a virtual internal combustion engine model having a virtual upstream intake air pressure (PA). The control system then calculates a target throttle opening (?) in accordance with a measured upstream intake pressure (PIN) so as to provide the target intake mass airflow (mt?), and controls a throttle valve based on the target throttle opening (?).Type: ApplicationFiled: August 14, 2006Publication date: May 8, 2008Applicant: Toyota Jidosha Kabushiki KaishaInventor: Akira Eiraku
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Publication number: 20080066723Abstract: In an internal combustion engine with a supercharger, there is provided a technique capable of quickly raising supercharging pressure. In the internal combustion engine with a supercharger which includes a communication passage 6 that connects between those portions of an exhaust passage 3 which are upstream and downstream of an exhaust gas turbine 4c of the supercharger 4, and a waste gate valve 7 that is arranged in said communication passage 6 so as to open from an upstream side of said communication passage 6 to a downstream side thereof, provision is made for a drive unit that applies a fixed force directed from the downstream side to the upstream side of said communication passage 6 to said waste gate valve 7. By applying the fixed force to the waste gate valve 7, said waste gate valve 7 is not opened until a differential pressure between the upstream and downstream sides of the waste gate valve 7 becomes larger than the fixed force, so the supercharging pressure rises smoothly.Type: ApplicationFiled: October 7, 2005Publication date: March 20, 2008Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Akira Eiraku
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Publication number: 20060276954Abstract: An apparatus and method for controlling the intake air amount in an internal combustion engine provided with a throttle valve and an intake air amount changing means linked with the same, the intake air amount control apparatus and method of an internal combustion engine finding a target intake air amount mcta based on an accelerator opening degree and engine speed (step 101), determining a target setting Cvta for said intake air amount changing means based on at least said target intake air amount (step 103), and finding a target throttle opening degree ?tta based on model equations creating a model of an engine intake system and expressing the air passing through the engine intake system from said target intake air amount mcta and the target setting Cvta (step 107).Type: ApplicationFiled: July 30, 2004Publication date: December 7, 2006Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Harufumi Muto, Yuji Miyanoo, Akira Eiraku, Masashi Hakariya
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Patent number: 7000578Abstract: An ECU calculates a target working angle r, and determines a difference between the target working angle r and the previous value r? of target working angle as a change rate v to be feedforward controlled. Further, the ECU determines a deviation to be corrected by feedback control from the target working angle r and an actual value that is input from a sensor as a hypothetical rate u. The change rate v and the hypothetical rate u are added together, and a control amount to be output, for example, a voltage E is determined by referring to a three-dimensional map M3 from the added set change rate (v+u) and the input target working angle r.Type: GrantFiled: October 27, 2004Date of Patent: February 21, 2006Assignee: Toyota Jidosha Kabushiki KaishaInventor: Akira Eiraku
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Publication number: 20050098127Abstract: An ECU calculates a target working angle r, and determines a difference between the target working angle r and the previous value r? of target working angle as a change rate v to be feedforward controlled. Further, the ECU determines a deviation to be corrected by feedback control from the target working angle r and an actual value that is input from a sensor as a hypothetical rate u. The change rate v and the hypothetical rate u are added together, and a control amount to be output, for example, a voltage E is determined by referring to a three-dimensional map M3 from the added set change rate (v+u) and the input target working angle r.Type: ApplicationFiled: October 27, 2004Publication date: May 12, 2005Inventor: Akira Eiraku