Patents by Inventor Yoshiya Yamashita
Yoshiya Yamashita 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: 11875616Abstract: A vehicle state monitoring device includes a storage device configured to store information relating to a vehicle traveling under power from an engine; a determining device configured to determine a state of the vehicle using the information stored in the storage device; and a storage control device. The storage control device is configured to, each time the vehicle travels a predetermined distance, store a frequency relation as the information in the storage device. The frequency relation is a relation between revolutions of the engine, a fuel-related parameter that is a load factor or a fuel injection rate of the engine, and a running frequency of the engine at the revolutions and the fuel-related parameter while the vehicle travels the predetermined distance.Type: GrantFiled: March 12, 2021Date of Patent: January 16, 2024Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoshiya Yamashita, Tetsu Yamada
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Patent number: 11808818Abstract: A degradation determination device for a secondary battery is used for a hybrid vehicle, and configured to determine degradation of the secondary battery. The hybrid vehicle includes an engine configured to output power, a motor configured to output power, the secondary battery configured to supply electric power to the motor, and a control device configured to execute travel control in which the engine and the motor are controlled. The degradation determination device includes a controller. The controller is configured to determine degradation of the secondary battery based on data of a third parameter in a predetermined period. The third parameter is the difference between a first parameter based on the accelerator operation amount and a second parameter based on a fuel injection amount.Type: GrantFiled: October 6, 2021Date of Patent: November 7, 2023Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Yoshiya Yamashita
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Patent number: 11802618Abstract: An apparatus for diagnosing remaining belt life is configured to diagnose the remaining life of a belt driven by an engine. The remaining life of the belt is diagnosed based on frequency distribution of an operation point that is made up of speed of the engine and a load factor of the engine or a fuel injection rate. This makes it possible to achieve accurate diagnosis of the remaining life of the belt.Type: GrantFiled: July 19, 2021Date of Patent: October 31, 2023Assignee: Toyota Jidosha Kabushiki KaishaInventor: Yoshiya Yamashita
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Patent number: 11772632Abstract: A deterioration evaluation apparatus for a secondary battery, which evaluates a degree of deterioration of the secondary battery of a hybrid vehicle including an engine that outputs a driving power, a motor that outputs a driving power, and the secondary battery configured to exchange an electric power with the motor, includes one or more processors configured to evaluate the degree of deterioration of the secondary battery based on a first relationship. The first relationship is set by using an accelerator operation amount and an operation point. The operation point includes a rotation speed of the engine and a load factor of the engine. The first relationship is a relationship between the operation point and a load on the secondary battery when the engine is operated at the operation point.Type: GrantFiled: April 15, 2021Date of Patent: October 3, 2023Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Yoshiya Yamashita
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Patent number: 11734961Abstract: Provided is a vehicle diagnostic device that diagnoses at least one vehicle on which an engine is mounted, in which the vehicle includes a moisture sensitive sensor disposed in an engine compartment and configured to detect moisture, and the vehicle diagnostic device is configured to diagnose that there is a possibility of the vehicle being exposed to dust in a case where an intake pressure of the engine is higher than a predetermined value and the moisture is detected by the moisture sensitive sensor. Therefore, a possibility of the vehicle being exposed to dust can be diagnosed before the vehicle fails.Type: GrantFiled: May 31, 2021Date of Patent: August 22, 2023Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Yoshiya Yamashita
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Patent number: 11460375Abstract: A specific sound having a higher frequency than an operation sound of an engine is generated in synchronization with timing of a top dead center of a specific cylinder of the engine. Thus, timing of a noise of the engine is estimated by using, for example, a deviation in time between timing of generation of a specific sound and timing at which a noise occurs in the engine, based on a sound collected from around the engine without directly using a signal of a crank angle of the engine.Type: GrantFiled: January 26, 2021Date of Patent: October 4, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Yoshiya Yamashita
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Patent number: 11455845Abstract: A fuel property diagnostic device configured to diagnose properties of fuel for a vehicle includes a computer configured to diagnose the properties of the fuel for each region based on the number of vehicles with clogging. The number of vehicles with clogging is the number of vehicles in which an internal combustion engine provided with an exhaust gas control device in an exhaust passage is mounted, the exhaust gas control device includes a filter for capturing particulate matter contained in an exhaust gas, and the filter is clogged.Type: GrantFiled: February 19, 2021Date of Patent: September 27, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoshiya Yamashita, Tetsu Yamada
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Patent number: 11420688Abstract: A vehicle attachment structure includes: a fixing member paired up with at least part of one component out of the first component and the second component, the fixing member being configured to fix at least part of the other component out of the first component and the second component and release the fixation; and a coupled member placed in the one component at a position corresponding to the fixing member, the coupled member being made of a magnetic material. The fixing member includes a magnet placed at a position corresponding to the coupled member, and a connecting mechanism connected to the magnet and configured to turn or rock the magnet so that the magnet approaches or separates from the coupled member.Type: GrantFiled: January 15, 2021Date of Patent: August 23, 2022Assignee: Toyota Jidosha Kabushiki KaishaInventor: Yoshiya Yamashita
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Publication number: 20220126727Abstract: A degradation determination device for a secondary battery is used for a hybrid vehicle, is configured to determine degradation of the secondary battery, and includes a processor. The processor is configured to determine whether predetermined charge control is executed based on a vehicle speed, an accelerator operation amount, and a fuel injection amount or a rotational speed. The processor determines that degradation of the secondary battery has progressed when a charge frequency is high compared to when the charge frequency is low. The charge frequency is the ratio of the time for which the predetermined charge control is executed to a required time for a predetermined period.Type: ApplicationFiled: September 14, 2021Publication date: April 28, 2022Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Yoshiya YAMASHITA
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Publication number: 20220113355Abstract: A degradation determination device for a secondary battery is used for a hybrid vehicle, and configured to determine degradation of the secondary battery. The hybrid vehicle includes an engine configured to output power, a motor configured to output power, the secondary battery configured to supply electric power to the motor, and a control device configured to execute travel control in which the engine and the motor are controlled. The degradation determination device includes a controller. The controller is configured to determine degradation of the secondary battery based on data of a third parameter in a predetermined period. The third parameter is the difference between a first parameter based on the accelerator operation amount and a second parameter based on a fuel injection amount.Type: ApplicationFiled: October 6, 2021Publication date: April 14, 2022Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Yoshiya YAMASHITA
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Patent number: 11299110Abstract: An acoustic insulation structure for a power train according to the present disclosure is provided with a cover member that covers at least an internal combustion engine of the power train including the internal combustion engine, and that includes a pool portion in which water that has entered into the inside of the cover member pools; and a water-absorption member arranged at the inside of the cover member. The cover member includes a moisture outlet that releases, into the atmospheric air, moisture present inside the cover member. The water-absorption member extends to the moisture outlet from the pool portion.Type: GrantFiled: January 22, 2019Date of Patent: April 12, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoshiya Yamashita, Masaya Tagawa
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Publication number: 20220090672Abstract: An apparatus for diagnosing remaining belt life is configured to diagnose the remaining life of a belt driven by an engine. The remaining life of the belt is diagnosed based on frequency distribution of an operation point that is made up of speed of the engine and a load factor of the engine or a fuel injection rate. This makes it possible to achieve accurate diagnosis of the remaining life of the belt.Type: ApplicationFiled: July 19, 2021Publication date: March 24, 2022Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Yoshiya YAMASHITA
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Publication number: 20210394744Abstract: A deterioration evaluation apparatus for a secondary battery, which evaluates a degree of deterioration of the secondary battery of a hybrid vehicle including an engine that outputs a driving power, a motor that outputs a driving power, and the secondary battery configured to exchange an electric power with the motor, includes one or more processors configured to evaluate the degree of deterioration of the secondary battery based on a first relationship. The first relationship is set by using an accelerator operation amount and an operation point. The operation point includes a rotation speed of the engine and a load factor of the engine. The first relationship is a relationship between the operation point and a load on the secondary battery when the engine is operated at the operation point.Type: ApplicationFiled: April 15, 2021Publication date: December 23, 2021Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Yoshiya YAMASHITA
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Publication number: 20210390794Abstract: Provided is a vehicle diagnostic device that diagnoses at least one vehicle on which an engine is mounted, in which the vehicle includes a moisture sensitive sensor disposed in an engine compartment and configured to detect moisture, and the vehicle diagnostic device is configured to diagnose that there is a possibility of the vehicle being exposed to dust in a case where an intake pressure of the engine is higher than a predetermined value and the moisture is detected by the moisture sensitive sensor. Therefore, a possibility of the vehicle being exposed to dust can be diagnosed before the vehicle fails.Type: ApplicationFiled: May 31, 2021Publication date: December 16, 2021Inventor: Yoshiya YAMASHITA
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Publication number: 20210335065Abstract: A vehicle state monitoring device includes a storage device configured to store information relating to a vehicle traveling under power from an engine; a determining device configured to determine a state of the vehicle using the information stored in the storage device; and a storage control device. The storage control device is configured to, each time the vehicle travels a predetermined distance, store a frequency relation as the information in the storage device. The frequency relation is a relation between revolutions of the engine, a fuel-related parameter that is a load factor or a fuel injection rate of the engine, and a running frequency of the engine at the revolutions and the fuel-related parameter while the vehicle travels the predetermined distance.Type: ApplicationFiled: March 12, 2021Publication date: October 28, 2021Inventors: Yoshiya YAMASHITA, Tetsu YAMADA
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Publication number: 20210316796Abstract: A vehicle attachment structure includes: a fixing member paired up with at least part of one component out of the first component and the second component, the fixing member being configured to fix at least part of the other component out of the first component and the second component and release the fixation; and a coupled member placed in the one component at a position corresponding to the fixing member, the coupled member being made of a magnetic material. The fixing member includes a magnet placed at a position corresponding to the coupled member, and a connecting mechanism connected to the magnet and configured to turn or rock the magnet so that the magnet approaches or separates from the coupled member.Type: ApplicationFiled: January 15, 2021Publication date: October 14, 2021Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Yoshiya YAMASHITA
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Publication number: 20210279979Abstract: A fuel property diagnostic device configured to diagnose properties of fuel for a vehicle includes a computer configured to diagnose the properties of the fuel for each region based on the number of vehicles with clogging. The number of vehicles with clogging is the number of vehicles in which an internal combustion engine provided with an exhaust gas control device in an exhaust passage is mounted, the exhaust gas control device includes a filter for capturing particulate matter contained in an exhaust gas, and the filter is clogged.Type: ApplicationFiled: February 19, 2021Publication date: September 9, 2021Inventors: Yoshiya YAMASHITA, Tetsu YAMADA
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Publication number: 20210278317Abstract: A specific sound having a higher frequency than an operation sound of an engine is generated in synchronization with timing of a top dead center of a specific cylinder of the engine. Thus, timing of a noise of the engine is estimated by using, for example, a deviation in time between timing of generation of a specific sound and timing at which a noise occurs in the engine, based on a sound collected from around the engine without directly using a signal of a crank angle of the engine.Type: ApplicationFiled: January 26, 2021Publication date: September 9, 2021Inventor: Yoshiya YAMASHITA
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Publication number: 20190275962Abstract: An acoustic insulation structure for a power train according to the present disclosure is provided with a cover member that covers at least an internal combustion engine of the power train including the internal combustion engine, and that includes a pool portion in which water that has entered into the inside of the cover member pools; and a water-absorption member arranged at the inside of the cover member. The cover member includes a moisture outlet that releases, into the atmospheric air, moisture present inside the cover member. The water-absorption member extends to the moisture outlet from the pool portion.Type: ApplicationFiled: January 22, 2019Publication date: September 12, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoshiya YAMASHITA, Masaya TAGAWA
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Patent number: 5628286Abstract: An improvement of a valve timing control apparatus for an engine is disclosed. The apparatus has an intake valve and an exhaust valve which are alternately opened and closed in a valve timing sequence according to a rotation of a cam shaft. A timing pulley mounted on the cam shaft has a housing accommodating a plunger movable therein and a sleeve secured to the cam shaft. The housing has a first and second pressure chambers defined by the plunger and sealed with respect to each other. The plunger is arranged to move in an axial direction to selectively advance and retard the cam shaft based on differential pressure between the first pressure chamber and the second pressure chamber. A controller controls an electromagnetic valve with a specific control value to adjust the fluid pressure to be supplied to the first and second pressure chambers to maintain the valve timing sequence converged to a target valve timing.Type: GrantFiled: March 26, 1996Date of Patent: May 13, 1997Assignee: Toyota Jidosha Kabushiki KaishaInventors: Senji Kato, Nobuhisa Ohkawa, Shigeru Sone, Tadahisa Naganawa, Yoshihito Moriya, Yoshiya Yamashita, Hitoshi Uda, Yuji Yoshihara