Patents by Inventor Makio Tsuchiyama
Makio Tsuchiyama 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: 11642969Abstract: A regenerative torque control unit is configured to reduce a regenerative torque and increase a rising gradient of the regenerative torque at a start of regeneration when a road surface friction coefficient acquired by a road surface friction coefficient acquisition unit is low as compared to when the road surface friction coefficient is high. Thus, it is possible to suppress occurrence of a slip on a low ? road, and it is less likely to provide a feeling of strangeness from a change between a low ? road and a high ? road.Type: GrantFiled: February 17, 2021Date of Patent: May 9, 2023Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Makio Tsuchiyama
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Publication number: 20220297670Abstract: A controller of a hybrid system including an internal combustion engine and a motor generator connected to each other via a belt includes processing circuitry configured to execute a power generation process that applies a load to the engine by controlling the motor generator to generate power when a first execution condition of an idling stop is satisfied, a slip rate calculation process that calculates a slip rate of the belt based on a rotational speed of the engine and a rotational speed of the motor generator while the power generation process is being executed, a determination process that determines whether or not a second execution condition of the idling stop is satisfied after waiting until a predetermined period elapses, when the slip rate is equal to or more than a threshold, and an idling stop process, when determining that the second execution condition is satisfied.Type: ApplicationFiled: March 15, 2022Publication date: September 22, 2022Inventors: Kensuke KITAGAWA, Yasuyuki TERADA, Makio TSUCHIYAMA
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Patent number: 11312223Abstract: A vehicle controller is configured to execute a duty cycle control process of alternately repeating an electric power generation execution period and an electric power generation stop period of an electric generator and controlling a duty cycle, which is a ratio of the electric power generation execution period to a single cycle of repeated cycles, when determining that an anomaly has occurred in a driving circuit. The duty cycle control process includes at least one of two processes, a process of setting the duty cycle to be larger when a member in an overheatable region, in which overheating is possibly performed by the heater, has a low temperature than when the member has a high temperature and a process of setting the duty cycle to be larger when an internal combustion engine has a large intake air amount than when the engine has a small intake air amount.Type: GrantFiled: April 26, 2019Date of Patent: April 26, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Makio Tsuchiyama
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Publication number: 20210316614Abstract: A regenerative torque control unit is configured to reduce a regenerative torque and increase a rising gradient of the regenerative torque at a start of regeneration when a road surface friction coefficient acquired by a road surface friction coefficient acquisition unit is low as compared to when the road surface friction coefficient is high. Thus, it is possible to suppress occurrence of a slip on a low ? road, and it is less likely to provide a feeling of strangeness from a change between a low ? road and a high ? road.Type: ApplicationFiled: February 17, 2021Publication date: October 14, 2021Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Makio TSUCHIYAMA
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Publication number: 20190366827Abstract: A vehicle controller is configured to execute a duty cycle control process of alternately repeating an electric power generation execution period and an electric power generation stop period of an electric generator and controlling a duty cycle, which is a ratio of the electric power generation execution period to a single cycle of repeated cycles, when determining that an anomaly has occurred in a driving circuit. The duty cycle control process includes at least one of two processes, a process of setting the duty cycle to be larger when a member in an overheatable region, in which overheating is possibly performed by the heater, has a low temperature than when the member has a high temperature and a process of setting the duty cycle to be larger when an internal combustion engine has a large intake air amount than when the engine has a small intake air amount.Type: ApplicationFiled: April 26, 2019Publication date: December 5, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Makio TSUCHIYAMA
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Patent number: 9423390Abstract: In order to estimate the cetane number of a fuel, fuel injection is executed by controlling the driving of a fuel injection valve by a prescribed amount. The amount of change in the rotation of a diesel engine generated in response to the fuel injection is detected, and the cetane number of the fuel is estimated on the basis of this amount of change in the rotation. The actual amount of fuel injected from the fuel injection valve is detected, and when the difference between the amount actually detected and the prescribed amount is equal to or greater than a threshold value, the execution of the fuel cetane number estimation process is restricted.Type: GrantFiled: March 29, 2011Date of Patent: August 23, 2016Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Makio Tsuchiyama, Yoshiyasu Ito, Takeshi Miyaura
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Patent number: 9127608Abstract: An electronic control unit detects an index value of an amount of generated heat of fuel to be combusted in a diesel engine. The electronic control unit also executes the injection of a predetermined amount of the fuel to estimate a cetane number of the fuel and calculates an index value of output torque of the diesel engine generated with that execution. Then, the electronic control unit calculates an estimated value of the cetane number of the fuel based on the index value of the output torque and the index value of the amount of generated heat.Type: GrantFiled: February 8, 2011Date of Patent: September 8, 2015Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yoshiyasu Ito, Takeshi Miyaura, Makio Tsuchiyama
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Patent number: 9051895Abstract: This apparatus is applied to an engine equipped with a fuel supply system that supplies pressure-increased fuel to a fuel injection valve, and performs the fuel injection from the injection valve in one combustion cycle by a multiple injection process that includes a pre-injection and a main injection that are executed with an interval therebetween. The apparatus calculates a deviation between a required value (one-dot chain line) and an actual value (solid line) regarding the end timing of the pre-injection, based on the manner of fluctuation of the fuel pressure in the fuel injection that is detected by a pressure sensor. A target main injection timing and a target pre-interval are individually set on the basis of the state of operation of the engine. Based on the deviation, the target main injection timing and the target pre-interval, the apparatus sets control target values regarding the execution period of the pre-injection.Type: GrantFiled: February 23, 2011Date of Patent: June 9, 2015Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takeshi Miyaura, Yoshiyasu Ito, Makio Tsuchiyama, Yoshihiro Furuya
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Patent number: 8820151Abstract: A cetane number estimation apparatus injects fuel from a fuel injection valve in a diesel engine based on a target fuel injection amount, calculates an indicator of output torque of the diesel engine produced through fuel injection, and estimates the cetane number of the fuel using the calculated indicator. The cetane number estimation apparatus includes a pressure sensor for detecting fuel pressure varied by variation in actual fuel pressure in the fuel injection valve at the time of the fuel injection. The cetane number estimation apparatus also has a pressure correcting section that is adapted to calculate actual operating characteristics of the fuel injection valve based on a variation waveform of the detected fuel pressure and corrects the target fuel injection amount based on the difference between the calculated actual operating characteristics and prescribed reference operating characteristics.Type: GrantFiled: November 25, 2011Date of Patent: September 2, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yoshiyasu Ito, Takeshi Miyaura, Makio Tsuchiyama
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Publication number: 20140013832Abstract: In order to estimate the cetane number of a fuel, fuel injection is executed by controlling the driving of a fuel injection valve by a prescribed amount. The amount of change in the rotation of a diesel engine generated in response to the fuel injection is detected, and the cetane number of the fuel is estimated on the basis of this amount of change in the rotation. The actual amount of fuel injected from the fuel injection valve is detected, and when the difference between the amount actually detected and the prescribed amount is equal to or greater than a threshold value, the execution of the fuel cetane number estimation process is restricted.Type: ApplicationFiled: March 29, 2011Publication date: January 16, 2014Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Makio Tsuchiyama, Yoshiyasu Ito, Takeshi Miyaura
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Publication number: 20130311063Abstract: An electronic control unit detects an index value of an amount of generated heat of fuel to be combusted in a diesel engine. The electronic control unit also executes the injection of a predetermined amount of the fuel to estimate a cetane number of the fuel and calculates an index value of output torque of the diesel engine generated with that execution. Then, the electronic control unit calculates an estimated value of the cetane number of the fuel based on the index value of the output torque and the index value of the amount of generated heat.Type: ApplicationFiled: February 8, 2011Publication date: November 21, 2013Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoshiyasu Ito, Takeshi Miyaura, Makio Tsuchiyama
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Publication number: 20130220006Abstract: A cetane number estimation apparatus injects fuel from a fuel injection valve in a diesel engine based on a target fuel injection amount, calculates an indicator of output torque of the diesel engine produced through fuel injection, and estimates the cetane number of the fuel using the calculated indicator. The cetane number estimation apparatus includes a pressure sensor for detecting fuel pressure varied by variation in actual fuel pressure in the fuel injection valve at the time of the fuel injection. The cetane number estimation apparatus also has a pressure correcting section that is adapted to calculate actual operating characteristics of the fuel injection valve based on a variation waveform of the detected fuel pressure and corrects the target fuel injection amount based on the difference between the calculated actual operating characteristics and prescribed reference operating characteristics.Type: ApplicationFiled: November 25, 2011Publication date: August 29, 2013Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoshiyasu Ito, Takeshi Miyaura, Makio Tsuchiyama
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Patent number: 8428850Abstract: In one embodiment, a total fuel injection amount is calculated from a torque required by an engine. A division ratio of a pre-injection amount that achieves both suppression of ignition delay of fuel from a main injection and suppression of a peak value of a heat production ratio of combustion from the main injection is calculated. Upper and lower limit guards are given to the obtained divided amount, and the divided injection amount is calculated. The injection amount of the main injection is obtained by subtracting the divided injection amount from the total fuel injection amount.Type: GrantFiled: October 31, 2008Date of Patent: April 23, 2013Assignee: Toyota Jidosha Kabushiki KaishaInventors: Mitsuhiro Nada, Akio Matsunaga, Yasuyuki Terada, Makio Tsuchiyama
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Patent number: 8387586Abstract: In one embodiment, a determination is made of whether or not in a condition in which a compressed gas temperature will reach a fuel self-ignition temperature by only a compression operation in the compression stroke, and in a case where the compressed gas temperature will reach the fuel self-ignition temperature, pilot injection is judged to be unnecessary, so this pilot injection is prohibited.Type: GrantFiled: October 31, 2008Date of Patent: March 5, 2013Assignee: Toyota Jidosha Kabushiki KaishaInventors: Akio Matsunaga, Mitsuhiro Nada, Yasuyuki Terada, Makio Tsuchiyama
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Publication number: 20120323468Abstract: This apparatus is applied to an engine equipped with a fuel supply system that supplies pressure-increased fuel to a fuel injection valve, and performs the fuel injection from the injection valve in one combustion cycle by a multiple injection process that includes a pre-injection and a main injection that are executed with an interval therebetween. The apparatus calculates a deviation between a required value (one-dot chain line) and an actual value (solid line) regarding the end timing of the pre-injection, based on the manner of fluctuation of the fuel pressure in the fuel injection that is detected by a pressure sensor. A target main injection timing and a target pre-interval are individually set on the basis of the state of operation of the engine. Based on the deviation, the target main injection timing and the target pre-interval, the apparatus sets control target values regarding the execution period of the pre-injection.Type: ApplicationFiled: February 23, 2011Publication date: December 20, 2012Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takeshi Miyaura, Yoshiyasu Ito, Makio Tsuchiyama, Yoshihiro Furuya
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Publication number: 20110005491Abstract: In one embodiment, a total pilot injection amount is calculated from the difference between a compressed gas temperature in a cylinder and a fuel self-ignition temperature. As pilot injection, a plurality of instances of divided pilot injection are performed, and by setting the injection amount per one instance of divided pilot injection to an injector minimum limit injection amount, each divided pilot injection amount is suppressed, and the penetration of fuel is suppressed to a low level so that attachment of fuel to a wall face is avoided, and also, fuel is caused to accumulate in the center portion of the cylinder.Type: ApplicationFiled: December 4, 2008Publication date: January 13, 2011Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yasuyuki Terada, Mitsuhiro Nada, Akio Matsunaga, Makio Tsuchiyama
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Publication number: 20100312454Abstract: In one embodiment, a total fuel injection amount is calculated from a torque required by an engine. A division ratio of a pre-injection amount that achieves both suppression of ignition delay of fuel from a main injection and suppression of a peak value of a heat production ratio of combustion from the main injection is calculated. Upper and lower limit guards are given to the obtained divided amount, and the divided injection amount is calculated. The injection amount of the main injection is obtained by subtracting the divided injection amount from the total fuel injection amount.Type: ApplicationFiled: October 31, 2008Publication date: December 9, 2010Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Mitsuhiro Nada, Akio Matsunaga, Yasuyuki Terada, Makio Tsuchiyama
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Publication number: 20100305833Abstract: In one embodiment, a determination is made of whether or not in a condition in which a compressed gas temperature will reach a fuel self-ignition temperature by only a compression operation in the compression stroke, and in a case where the compressed gas temperature will reach the fuel self-ignition temperature, pilot injection is judged to be unnecessary, so this pilot injection is prohibited.Type: ApplicationFiled: October 31, 2008Publication date: December 2, 2010Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Akio Matsunaga, Mitsuhiro Nada, Yasuyuki Terada, Makio Tsuchiyama