Patents by Inventor Akito Uchida
Akito Uchida 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: 11408360Abstract: An engine device is equipped with an engine, a supercharger having a turbine, a compressor and a waste gate valve, and a control device that controls the engine and the supercharger, and that performs an abnormality diagnosis of a relationship between an intake air amount of the engine and a supercharging pressure as a pressure downstream of the compressor in the intake pipe. The control device performs boost control for controlling the waste gate valve such that the supercharging pressure becomes higher when a predetermined condition is fulfilled than when the predetermined condition is not fulfilled. The control device further sets a threshold for use in the abnormality diagnosis, based on whether or not the boost control is performed.Type: GrantFiled: January 14, 2021Date of Patent: August 9, 2022Assignee: Toyota Jidosha Kabushiki KaishaInventor: Akito Uchida
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Patent number: 11333098Abstract: An engine controller calculates a pulsation correction value based on actuation states of an air bypass valve (ABV) and a wastegate valve (WGV) that change the shape of intake and exhaust flow passages of an exhaust turbocharger. The pulsation correction value is used to compensate for an output error of an airflow meter caused by intake pulsation. The engine controller also calculates a fuel injection amount of an injector, based on an output of the airflow meter that has been corrected based on the pulsation correction value.Type: GrantFiled: January 14, 2021Date of Patent: May 17, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Akito Uchida, Koji Aso
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Publication number: 20210285392Abstract: An engine device is equipped with an engine, a supercharger having a turbine, a compressor and a waste gate valve, and a control device that controls the engine and the supercharger, and that performs an abnormality diagnosis of a relationship between an intake air amount of the engine and a supercharging pressure as a pressure downstream of the compressor in the intake pipe. The control device performs boost control for controlling the waste gate valve such that the supercharging pressure becomes higher when a predetermined condition is fulfilled than when the predetermined condition is not fulfilled. The control device further sets a threshold for use in the abnormality diagnosis, based on whether or not the boost control is performed.Type: ApplicationFiled: January 14, 2021Publication date: September 16, 2021Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Akito UCHIDA
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Publication number: 20210246847Abstract: An engine controller calculates a pulsation correction value based on actuation states of an air bypass valve (ABV) and a wastegate valve (WGV) that change the shape of intake and exhaust flow passages of an exhaust turbocharger. The pulsation correction value is used to compensate for an output error of an airflow meter caused by intake pulsation. The engine controller also calculates a fuel injection amount of an injector, based on an output of the airflow meter that has been corrected based on the pulsation correction value.Type: ApplicationFiled: January 14, 2021Publication date: August 12, 2021Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Akito UCHIDA, Koji ASO
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Patent number: 9670856Abstract: When a stop position of a piston resulting from the automatic stop is in a range that is on an advance side of a threshold in terms of crank angle, fuel injection is performed at beginning of the automatic restart-up in the cylinder that is in the intake stroke and an ignition is performed in a subsequent initial compression stroke in the same cylinder. When the stop position of the piston resulting is in a range that is on a retard side of the threshold in terms of crank angle, initial fuel injection is performed in the cylinder that next enters an intake stroke among the cylinders of the internal combustion engine after the beginning of automatic restart-up and initial ignition is performed in a subsequent compression stroke in the same cylinder. The threshold is determined in accordance with an amount of deviation of a crank angle.Type: GrantFiled: March 13, 2013Date of Patent: June 6, 2017Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Akito Uchida, Hiroshi Enomoto, Yoshifumi Nakamura
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Publication number: 20170107959Abstract: A control device, which is a fuel supply control device, performs a self-heating procedure by which an electric current is applied to a solenoid of a CNG injection valve in such a range that CNG is not injected from the CNG injection valve before engine operation using CNG is started.Type: ApplicationFiled: October 11, 2016Publication date: April 20, 2017Applicants: AISAN KOGYO KABUSHIKI KAISHA, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Mutsumi TSUJINO, Akito UCHIDA
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Publication number: 20160123276Abstract: A liquefied gas fuel supplying apparatus includes an injector that injects fuel to an engine, a fuel tank that stores the fuel, a fuel pump that pumps the fuel from the fuel tank to the injector, a fuel cooler that cools the fuel that is pumped from the fuel pump to the injector, a fuel temperature sensor that detects a fuel temperature in a pipe, and an ECU. The ECU, during engine operation, estimates the fuel temperature in the pipe after engine stop, based on a detection value detected by the fuel temperature sensor, and performs drive control of the fuel cooler to cool the fuel, when the estimated temperature is higher than a temperature that is evaluated from a predetermined saturated vapor pressure curve.Type: ApplicationFiled: November 2, 2015Publication date: May 5, 2016Inventors: Mutsumi TSUJINO, Akito UCHIDA
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Publication number: 20150025779Abstract: When a stop position of a piston resulting from the automatic stop is in a range that is on an advance side of a threshold in terms of crank angle, fuel injection is performed at beginning of the automatic restart-up in the cylinder that is in the intake stroke and an ignition is performed in a subsequent initial compression stroke in the same cylinder. When the stop position of the piston resulting is in a range that is on a retard side of the threshold in terms of crank angle, initial fuel injection is performed in the cylinder that next enters an intake stroke among the cylinders of the internal combustion engine after the beginning of automatic restart-up and initial ignition is performed in a subsequent compression stroke in the same cylinder. The threshold is determined in accordance with an amount of deviation of a crank angle.Type: ApplicationFiled: March 13, 2013Publication date: January 22, 2015Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Akito Uchida, Hiroshi Enomoto, Yoshifumi Nakamura
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Patent number: 5036422Abstract: A driving circuit for driving a solenoid pump or the like, wherein a driving current supplied from a rechargeable battery 1 is alternately switched to on and off when flowing in an inductive element 2. The inductive element produces a driving force applied to the solenoid pump when the driving current flows therein. The inductive element generated a counter-electromotive force when the driving current flowing therein is interrupted. An accumulating circuit comprising a capacitor 5 is connected to the inductive element to accumulate the counter-electromotive force, and a releasing circuit 4 is connected to the accumulating circuit to release the counter-electromotive force accumulated in the accumulating circuit. The counter-electromotive force released from the releasing circuit produces a superfluous driving current and the latter current is superposed on the driving current supplied form the battery.Type: GrantFiled: May 12, 1989Date of Patent: July 30, 1991Assignee: Kabushiki Kaisha Nagano Keiki SeisakushoInventors: Akito Uchida, Daiji Uehara
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Patent number: 4966533Abstract: A vacuum pump provided with a restoration coil spring 18 having a reduced size and reduced biasing force to render an overall size of the pump compact includes a casing which defines therein a pumping chamber 6 and an operational chamber 3; a piston 7 reciprocally disposed in the pumping chamber, the piston dividing the pumping chamber into front and rear compartments R1, R2; an operational mechanism disposed in the operational chamber for moving the piston; and, a piston rod 4 having one end connected to the piston, the piston rod extending through the rear compartment and the operational chamber. The operational mechanism includes a solenoid armature 13 on the piston rod, and an electromagnet 14, 15 in the operational chamber.Type: GrantFiled: July 14, 1988Date of Patent: October 30, 1990Assignee: Kabushiki Kaisha Nagano Keiki SeisakushoInventors: Akito Uchida, Iwao Sakaguchi