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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Patent number: 11634116Abstract: A control system for a vehicle that executes a feedback control properly to adjust a speed of a predetermined rotary member to a target speed. A controller is configured to: calculate an amount of change in a torque applied to the rotary member by one of the torque devices, in accordance with operating conditions of the torque devices; and calculate an amount of change in the torque applied to the rotary member by another one of the torque devices, based on a target amount of change in a synthesized torque of the torques of the torque devices and the amount of change in the torque applied to the rotary member by one of the torque devices.Type: GrantFiled: February 10, 2021Date of Patent: April 25, 2023Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Keisuke Sasaki, Akira Eiraku
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Publication number: 20210261114Abstract: A control system for a vehicle that executes a feedback control properly to adjust a speed of a predetermined rotary member to a target speed. A controller is configured to: calculate an amount of change in a torque applied to the rotary member by one of the torque devices, in accordance with operating conditions of the torque devices; and calculate an amount of change in the torque applied to the rotary member by another one of the torque devices, based on a target amount of change in a synthesized torque of the torques of the torque devices and the amount of change in the torque applied to the rotary member by one of the torque devices.Type: ApplicationFiled: February 10, 2021Publication date: August 26, 2021Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Keisuke SASAKI, Akira EIRAKU
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Patent number: 10677345Abstract: A control device of an automatic transmission controls an automatic transmission 1 comprising a transmission mechanism 3 including a plurality of engagement elements, and a hydraulic oil supply device 4 supplying hydraulic oil to the transmission mechanism The control device of the automatic transmission comprises an engagement element control part 41 configured to use the hydraulic oil supply device to make the plurality of engagement elements change between an engaged state and a disengaged state; and a deceleration degree calculating part 42 configured to calculate a target deceleration degree of a vehicle in which the automatic transmission is provided. The engagement element control part is configured to make the engagement element in the disengaged state engage so that the vehicle decelerates if the target deceleration degree is equal to or more than a predetermined value when an increase in temperature of hydraulic oil in the automatic transmission is demanded.Type: GrantFiled: January 3, 2019Date of Patent: June 9, 2020Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroshi Watanabe, Akira Eiraku, Koji Morita
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Patent number: 10526980Abstract: To improve accuracy in misfire determination, a control apparatus for an internal combustion engine that controls an internal combustion engine having a variable compression ratio mechanism capable of changing the compression ratio of the internal combustion engine includes a controller configured to: determine that a misfire occurs if the magnitude of rotational fluctuation of the internal combustion engine is equal to or larger than a misfire criterion value and to make the misfire criterion value larger during the time in which changing of the compression ratio of the internal combustion engine is in progress than during the time in which the compression ratio is not being changed.Type: GrantFiled: July 26, 2017Date of Patent: January 7, 2020Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Keisuke Sasaki, Akira Eiraku, Masanori Hattori, Yoshiyuki Kageura, Teppei Yoshioka, Shinichi Hiraoka
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Publication number: 20190219155Abstract: A control device of an automatic transmission controls an automatic transmission 1 comprising a transmission mechanism 3 including a plurality of engagement elements, and a hydraulic oil supply device 4 supplying hydraulic oil to the transmission mechanism The control device of the automatic transmission comprises an engagement element control part 41 configured to use the hydraulic oil supply device to make the plurality of engagement elements change between an engaged state and a disengaged state; and a deceleration degree calculating part 42 configured to calculate a target deceleration degree of a vehicle in which the automatic transmission is provided. The engagement element control part is configured to make the engagement element in the disengaged state engage so that the vehicle decelerates if the target deceleration degree is equal to or more than a predetermined value when an increase in temperature of hydraulic oil in the automatic transmission is demanded.Type: ApplicationFiled: January 3, 2019Publication date: July 18, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroshi Watanabe, Akira Eiraku, Koji Morita
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Patent number: 10253708Abstract: A shift control system which can reduce a shift shock is provided. A target torque determiner set a target torque of an engine based on an accelerator position. An actual torque determiner calculates an actual torque of the engine in the inertia phase. A controller calculates an integrated value of a difference between the target torque and the actual torque from a commencement of the inertia phase to a predetermined time point before a termination of the inertia phase, and corrects the target torque in a remaining period between the predetermined time point and the termination of the inertia phase.Type: GrantFiled: November 16, 2017Date of Patent: April 9, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroshi Watanabe, Akira Eiraku
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Patent number: 10202924Abstract: It is an object of the invention to enhance the possibility of realizing a required torque in a supercharging region where scavenging occurs in a control apparatus for a supercharged engine. In order to achieve this object, the control apparatus for the supercharged engine according to the invention determines an operation amount of an intake valve driving device from a target in-cylinder air amount that is calculated from a required torque, and determines an operation amount of a throttle from a target intake valve passing air amount that is obtained by adding an amount of air blowing through an interior of a cylinder to the target in-cylinder air amount.Type: GrantFiled: July 25, 2012Date of Patent: February 12, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shinichi Soejima, Akira Eiraku, Satoru Tanaka, Satoshi Yoshizaki, Kiyonori Takahashi, Yoshihiro Sakayanagi
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Patent number: 10100753Abstract: In a multiple cylinder supercharged engine, when reduced cylinder operation is executed, a throttle, which is located downstream of a compressor driven by a turbine provided in an exhaust passage, through which exhaust gas of a cylinder group flows, is operated to a fully closed state, wherein the reduced cylinder operation is applied to the cylinder group. A fuel injection amount of at least one cylinder included in the cylinder group is made smaller than a fuel injection amount of a cylinder included in another cylinder group, and this at least one cylinder is operated, in order to increase rotational speed of the compressor, so that a value of pressure of an upstream side of the throttle is controlled to a value, which is equal to or larger than a value of pressure of a downstream side of the throttle.Type: GrantFiled: February 18, 2016Date of Patent: October 16, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yusuke Saito, Noriyasu Adachi, Akira Eiraku
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Publication number: 20180149101Abstract: A shift control system which can reduce a shift shock is provided. A target torque determiner set a target torque of an engine based on an accelerator position. An actual torque determiner calculates an actual torque of the engine in the inertia phase. A controller calculates an integrated value of a difference between the target torque and the actual torque from a commencement of the inertia phase to a predetermined time point before a termination of the inertia phase, and corrects the target torque in a remaining period between the predetermined time point and the termination of the inertia phase.Type: ApplicationFiled: November 16, 2017Publication date: May 31, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroshi WATANABE, Akira EIRAKU
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Publication number: 20180038297Abstract: A control system is applied to an internal combustion engine having a plurality of cylinders, a variable compression ratio changer configured to change the compression ratio of each of the cylinders of the internal combustion engine individually, in-cylinder injection valves that inject fuel into the respective cylinders, and in-passage injection valves each of which injects fuel into an intake passage corresponding to each of the cylinders. To reduce differences in the air-fuel ratio among the cylinders during changing the compression ratio, the control system makes the proportion of the quantity of fuel injected through the in-passage injection valves to the total quantity of fuel injected through the in-cylinder injection valves and the in-passage injection valves larger during the time in which the compression ratios of all the cylinders are being changed than during the time in which the compression ratios of all the cylinders are fixed.Type: ApplicationFiled: August 1, 2017Publication date: February 8, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Keisuke SASAKI, Akira EIRAKU, Masanori HATTORI, Yoshiyuki KAGEURA, Teppei YOSHIOKA, Shinichi HIRAOKA
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Publication number: 20180030906Abstract: To improve accuracy in misfire determination, a control apparatus for an internal combustion engine that controls an internal combustion engine having a variable compression ratio mechanism capable of changing the compression ratio of the internal combustion engine includes a controller configured to: determine that a misfire occurs if the magnitude of rotational fluctuation of the internal combustion engine is equal to or larger than a misfire criterion value and to make the misfire criterion value larger during the time in which changing of the compression ratio of the internal combustion engine is in progress than during the time in which the compression ratio is not being changed.Type: ApplicationFiled: July 26, 2017Publication date: February 1, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Keisuke SASAKI, Akira EIRAKU, Masanori HATTORI, Yoshiyuki KAGEURA, Teppei YOSHIOKA, Shinichi HIRAOKA
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Publication number: 20160245191Abstract: In a multiple cylinder supercharged engine, when reduced cylinder operation is executed, a throttle, which is located downstream of a compressor driven by a turbine provided in an exhaust passage, through which exhaust gas of a cylinder group flows, is operated to a fully closed state, wherein the reduced cylinder operation is applied to the cylinder group. A fuel injection amount of at least one cylinder included in the cylinder group is made smaller than a fuel injection amount of a cylinder included in another cylinder group, and this at least one cylinder is operated, in order to increase rotational speed of the compressor, so that a value of pressure of an upstream side of the throttle is controlled to a value, which is equal to or larger than a value of pressure of a downstream side of the throttle.Type: ApplicationFiled: February 18, 2016Publication date: August 25, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yusuke SAITO, Noriyasu ADACHI, Akira EIRAKU
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Patent number: 9206734Abstract: A control apparatus for an internal combustion engine according to the present invention includes: a turbocharger having a turbine disposed in an exhaust path and a compressor disposed in an intake path; a waste gate valve that opens and closes a bypass channel that connects a part of the exhaust path upstream of the turbine and a part of the exhaust path downstream of the turbine to each other; a drive mechanism that drives the waste gate valve; and waste gate valve opening controlling means that controls the drive mechanism so that the opening of the waste gate valve agrees with a saturation minimum opening when the drive mechanism opens the waste gate valve, the saturation minimum opening being the minimum opening at which the flow rate of an exhaust gas passing through the bypass channel is saturated.Type: GrantFiled: March 17, 2010Date of Patent: December 8, 2015Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shintaro Hotta, Akira Eiraku
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Publication number: 20150184606Abstract: It is an object of the invention to enhance the possibility of realizing a required torque in a supercharging region where scavenging occurs in a control apparatus for a supercharged engine. In order to achieve this object, the control apparatus for the supercharged engine according to the invention determines an operation amount of an intake valve driving device from a target in-cylinder air amount that is calculated from a required torque, and determines an operation amount of a throttle from a target intake valve passing air amount that is obtained by adding an amount of air blowing through an interior of a cylinder to the target in-cylinder air amount.Type: ApplicationFiled: July 25, 2012Publication date: July 2, 2015Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shinichi Soejima, Akira Eiraku, Satoru Tanaka, Satoshi Yoshizaki, Kiyonori Takahashi, Yoshihiro Sakayanagi
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Publication number: 20150159546Abstract: An object of the present invention is to improve controllability over a supercharging pressure in a transient state, in a control device of an internal combustion engine equipped with a turbo supercharger that determines a manipulated variable of an actuator which acts on a rotational speed of a turbine by feedback control based on a deviation between a target state quantity and an actual state quantity. To this end, a control device according to the present invention determines an opening degree of a throttle by feedforward control based on a target intake air amount, and determines a manipulated variable of the actuator by feedback control based on a deviation between a target intake pressure determined from the target intake air amount and an actual intake pressure.Type: ApplicationFiled: July 12, 2012Publication date: June 11, 2015Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoshihiro Sakayanagi, Akira Eiraku, Satoru Tanaka, Yusuke Saito, Shinichi Soejima
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Patent number: 8973563Abstract: An internal combustion engine control apparatus includes means that detects an inlet temperature that is a temperature in a vicinity of an inlet of a purification catalyst disposed in an exhaust path and means that detects a turbine temperature that is a temperature in a vicinity of an exhaust turbine of a turbo-supercharger disposed in the exhaust path, and also includes means that controls a valve overlap that is a state in which an intake valve and an exhaust valve of the internal combustion engine are open simultaneously. When the inlet temperature is lower than an inlet high temperature reference value, and the turbine temperature is higher than a turbine high temperature reference value that is higher than the inlet high temperature reference value, the valve overlap amount is increased so as to be greater than a turbine high temperature time reference amount.Type: GrantFiled: April 20, 2010Date of Patent: March 10, 2015Assignee: Toyota Jidosha Kabushiki KaishaInventor: Akira Eiraku
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Patent number: 8577580Abstract: 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: GrantFiled: February 26, 2010Date of Patent: November 5, 2013Assignee: Toyota Jidosha Kabushiki KaishaInventor: Akira Eiraku
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Patent number: 8166935Abstract: 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: GrantFiled: March 31, 2008Date of Patent: May 1, 2012Assignees: Toyota Jidosha Kabushiki Kaisha, Denso CorporationInventors: Akira Eiraku, Jouji Yamaguchi
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Publication number: 20120085092Abstract: A control apparatus for an internal combustion engine according to the present invention includes: a turbocharger having a turbine disposed in an exhaust path and a compressor disposed in an intake path; a waist gate valve that opens and closes a bypass channel that connects a part of the exhaust path upstream of the turbine and a part of the exhaust path downstream of the turbine to each other; a drive mechanism that drives the waist gate valve; and waist gate valve opening controlling means that controls the drive mechanism so that the opening of the waist gate valve agrees with a saturation minimum opening when the drive mechanism opens the waist gate valve, the saturation minimum opening being the minimum opening at which the flow rate of an exhaust gas passing through the bypass channel is saturated.Type: ApplicationFiled: March 17, 2010Publication date: April 12, 2012Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shintaro Hotta, Akira Eiraku
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Publication number: 20110253116Abstract: An internal combustion engine control apparatus includes means that detects an inlet temperature that is a temperature in a vicinity of an inlet of a purification catalyst disposed in an exhaust path and means that detects a turbine temperature that is a temperature in a vicinity of an exhaust turbine of a turbo-supercharger disposed in the exhaust path, and also includes means that controls a valve overlap that is a state in which an intake valve and an exhaust valve of the internal combustion engine are open simultaneously. When the inlet temperature is lower than an inlet high temperature reference value, and the turbine temperature is higher than a turbine high temperature reference value that is higher than the inlet high temperature reference value, the valve overlap amount is increased so as to be greater than a turbine high temperature time reference amount.Type: ApplicationFiled: April 20, 2010Publication date: October 20, 2011Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Akira Eiraku