Patents by Inventor Harufumi Muto

Harufumi Muto 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).

  • Publication number: 20200392915
    Abstract: A control device for a high pressure fuel pump (33) for fuel injection (14) in which values of at least seven parameters of an engine speed, an engine load, a lubrication oil temperature, an amount of fuel supplied to the high pressure fuel pump (33), a temperature of intake air fed into the engine, a temperature of fuel discharged from the high pressure fuel pump (33), and a vehicle speed are acquired, and a learned neural network learned in weights using acquired values of the seven parameters as input values of the neural network and using as training data the temperature of fuel discharged from the high pressure fuel pump (33) acquired after a fixed time period from when acquiring the values of the seven parameters is stored, At the time of an engine operation, the temperature of fuel discharged from the high pressure fuel pump (33) after the fixed time period is estimated by using the learned neural network from the current estimated temperature of fuel discharged from the high pressure fuel pump (33).
    Type: Application
    Filed: April 20, 2020
    Publication date: December 17, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Harufumi MUTO, Naoya Okubo, Akihiro Katayama, Yosuke Hashimoto
  • Publication number: 20200378329
    Abstract: A learned neural network learned in weights using an engine load, an engine speed, and an intake pressure inside the engine intake passage downstream of the throttle valve (19) as input parameters of the neural network and using leakage of blow-by gas from a blow-by gas feed path (20) as a truth label is stored. At the time of operation of the vehicle, the learned neural network is used to detect the abnormality of leakage of blow-by gas from the blow-by gas feed path (20) from the above input parameters.
    Type: Application
    Filed: May 13, 2020
    Publication date: December 3, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Harufumi MUTO, Naoya OKUBO, Akihiro KATAYAMA, Yosuke HASHIMOTO
  • Publication number: 20200378330
    Abstract: A learned neural network in weights using at least the four parameters of the engine load, engine speed, intake pressure inside the intake passage downstream of the throttle valve (12), and amount of intake air fed into the engine as input parameters of the neural network and using a target EGR rate as training data is stored. At the time of engine operation, the learned neural network is used to estimate the target EGR rate from the above parameters and abnormality of the exhaust gas recirculation system is detected based on the difference between the estimated value of the target EGR rate and the target EGR rate.
    Type: Application
    Filed: April 6, 2020
    Publication date: December 3, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Harufumi MUTO, Yuki IKEJIRI, Akihiro KATAYAMA, Yosuke HASHIMOTO
  • Patent number: 10844803
    Abstract: An abnormality detection device for an air-fuel ratio sensor is provided. An air-fuel ratio sensor is provided in an exhaust passage. A storage device stores mapping data specifying a mapping. The mapping outputs an abnormality determination variable using first time series data and second time series data as an input. The first time series data is time series data of an excess amount variable in a first predetermined period. The excess amount variable is a variable corresponding to an excess amount of fuel actually discharged to the exhaust passage in relation to an amount of fuel reacting without excess or deficiency with oxygen contained in a fluid discharged to the exhaust passage. The second time series data is time series data of an air-fuel ratio detection variable in a second predetermined period.
    Type: Grant
    Filed: March 16, 2020
    Date of Patent: November 24, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Harufumi Muto, Akihiro Katayama, Kohei Mori, Yosuke Hashimoto
  • Patent number: 10830187
    Abstract: At the time of stopping operation of the vehicle, the pressures inside of the fuel tank (5) and inside of the canister (6) detected at every constant time are stored in the storage device. A learned neural network using the pressures inside the fuel tank (5) and inside the canister (6) for each fixed time stored in the storage device and the atmospheric pressure as input parameters of the neural network and using a case where perforation occurs in the system causing fuel vapor to leak as a truth label is stored. At the time of stopping operation of the vehicle, a perforation abnormality causing fuel vapor to leak is detected from these input parameters by using the learned neural network.
    Type: Grant
    Filed: February 18, 2020
    Date of Patent: November 10, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Harufumi Muto, Akihiro Katayama, Yosuke Hashimoto, Kazuki Tsuruoka
  • Publication number: 20200332747
    Abstract: At the time of stopping operation of the vehicle, the pressures inside of the fuel tank (5) and inside of the canister (6) detected at every constant time are stored in the storage device. A learned neural network using the pressures inside the fuel tank (5) and inside the canister (6) for each fixed time stored in the storage device and the atmospheric pressure as input parameters of the neural network and using a case where perforation occurs in the system causing fuel vapor to leak as a truth label is stored. At the time of stopping operation of the vehicle, a perforation abnormality causing fuel vapor to leak is detected from these input parameters by using the learned neural network.
    Type: Application
    Filed: February 18, 2020
    Publication date: October 22, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Harufumi MUTO, Akihiro KATAYAMA, Yosuke HASHIMOTO, Kazuki TSURUOKA
  • Publication number: 20200332731
    Abstract: An oxygen storage amount estimation device estimates an oxygen storage amount of a catalyst disposed in an exhaust passage of an internal combustion engine. The oxygen storage amount estimation device includes a storage device and processing circuitry. The storage device stores mapping data, which is data specifying a mapping that uses multiple variables including at least an excess-deficient amount variable and a previous value of a storage amount variable as an input to output a value of the storage amount variable. The processing circuitry executes a storage amount variable calculation process that repeatedly calculates a value of the storage amount variable based on an output of the mapping using the multiple variables and an operation process that operates predetermined hardware based on a calculation result of the storage amount variable calculation process. The mapping data includes data learned by machine learning.
    Type: Application
    Filed: March 31, 2020
    Publication date: October 22, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Harufumi MUTO, Akihiro KATAYAMA, Yosuke HASHIMOTO
  • Publication number: 20200300156
    Abstract: To estimate an engine cooling water temperature, four learned neural networks (150A, 150B, 150C, and 150D) are stored, in which weights are learned for the four states of whether the grille shutter (50) is opened and whether air blown by the blower (63) circulates through the air-conditioning use heater (65). The engine cooling water temperature is estimated using any one of the learned neural networks selected from among the four learned neural networks (150A, 150B, 150C, and 150D). An abnormality of the engine cooling water recirculation system is detected based on the estimated value of the engine cooling water temperature.
    Type: Application
    Filed: January 27, 2020
    Publication date: September 24, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Harufumi MUTO, Akihiro KATAYAMA, Yosuke HASHIMOTO, Junji HYODO
  • Publication number: 20200300193
    Abstract: An abnormality detection device for an air-fuel ratio sensor is provided. An air-fuel ratio sensor is provided in an exhaust passage. A storage device stores mapping data specifying a mapping. The mapping outputs an abnormality determination variable using first time series data and second time series data as an input. The first time series data is time series data of an excess amount variable in a first predetermined period. The excess amount variable is a variable corresponding to an excess amount of fuel actually discharged to the exhaust passage in relation to an amount of fuel reacting without excess or deficiency with oxygen contained in a fluid discharged to the exhaust passage. The second time series data is time series data of an air-fuel ratio detection variable in a second predetermined period.
    Type: Application
    Filed: March 16, 2020
    Publication date: September 24, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Harufumi MUTO, Akihiro KATAYAMA, Kohei MORI, Yosuke HASHIMOTO
  • Publication number: 20200271069
    Abstract: An imbalance detection device is provided. An obtainment process includes obtaining a rotation waveform variable based on a detection value of a sensor that detects a rotational behavior of a crankshaft, and an air-fuel ratio detection variable in each of a plurality of first intervals. A calculation process includes calculating an imbalance variable based on an output of a mapping having a value obtained by the obtainment process as an input. The imbalance variable indicates a degree of variations in an air-fuel ratio of the internal combustion engine. The rotation waveform variable indicates a difference between instantaneous speed variables that are variables corresponding to the rotational speed of the crankshaft in each of the second intervals.
    Type: Application
    Filed: February 10, 2020
    Publication date: August 27, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Harufumi MUTO, Akihiro KATAYAMA, Kohei MORI, Yosuke HASHIMOTO
  • Publication number: 20200263624
    Abstract: A misfire detection device for an internal combustion engine is provided. A mapping takes time series data of instantaneous speed parameters as inputs. Each instantaneous speed parameter corresponds to one of a plurality of successive second intervals in a first interval. The instantaneous speed parameters correspond to the rotational speed of the crankshaft. The first interval is a rotational angular interval of the crankshaft in which compression top dead center occurs. The second interval is smaller than an interval between compression top dead center positions. The mapping outputs a probability that a misfire has occurred in at least one cylinder that reaches compression top dead center in the first interval. The mapping data defining the mapping has been learned by machine learning.
    Type: Application
    Filed: February 10, 2020
    Publication date: August 20, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Harufumi MUTO, Satoshi TAKAMOTO, Akihiro KATAYAMA, Tatsunobu MURAI
  • Publication number: 20200265528
    Abstract: A supply information communication system, a communication module, a liquid supply facility, and a supply information communication method are provided. The communication module is mounted on a vehicle to which liquid is supplied from the liquid supply facility. An obtaining section of the liquid supply facility obtains identifying information for identifying the vehicle that is a supply destination of the liquid discharged by a supplying section. A transmitting section of the liquid supply facility transmits supply information to the vehicle identified by the identifying information. The supply information includes information indicating that the liquid has been supplied. The communication module includes a receiving section and a storing section. The receiving section receives the supply information addressed to the vehicle on which the communication module is mounted. The storing section stores the received supply information.
    Type: Application
    Filed: December 5, 2019
    Publication date: August 20, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kazuki SUGIE, Harufumi MUTO, Yosuke HASHIMOTO
  • Publication number: 20200263594
    Abstract: A catalyst deterioration detection device is provided to detect deterioration of a catalyst provided in an exhaust passage of an internal combustion engine. The catalyst deterioration detection device includes a storage device and processing circuitry. The storage device stores map data specifying a mapping that uses time series data of an excess amount variable in a first predetermined period and time series data of a downstream detection variable in a second predetermined period as inputs to output a deterioration level variable. The processing circuitry executes an acquisition process that acquires data, a deterioration level variable calculation process that calculates a deterioration level variable of the catalyst based on an output of the mapping using the data acquired by the acquisition process as an input. The map data includes data that is learned through machine learning.
    Type: Application
    Filed: January 31, 2020
    Publication date: August 20, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Harufumi MUTO, Haruki OGURI, Akihiro KATAYAMA, Yosuke HASHIMOTO
  • Publication number: 20200263592
    Abstract: A storage device stores mapping data and association data. The mapping data defines a mapping that outputs an estimated value of the temperature of a catalyst using a warm-up operation amount variable and the previous value of the estimated value as an input. The association data associates the integrated value of an intake air amount of an internal combustion engine from the startup of the engine and the temperature of the catalyst. The execution device repeatedly calculates the estimated value based on the output of the mapping. When the correspondence relationship between the integrated value and the estimated value is different from the correspondence relationship between the integrated value and the temperature of the catalyst in the association data, the warm-up process is determined to have an anomaly.
    Type: Application
    Filed: February 4, 2020
    Publication date: August 20, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Harufumi MUTO, Akihiro KATAYAMA, Yuki IKEJIRI, Yosuke HASHIMOTO
  • Publication number: 20200263618
    Abstract: A PM amount estimation device is applied to a filter that collects PM in the exhaust gas discharged to an exhaust passage of an internal combustion engine. A storage device stores mapping data which is data defining a mapping that outputs the PM amount collected by the filter. The mapping has at least one of an intake air temperature variable and a wall surface variable, and a flow rate variable as inputs. The intake air temperature variable relates to the temperature of air drawn into the engine. The wall surface variable relates to a cylinder wall surface temperature of the engine. The flow rate variable indicates the flow rate of the fluid entering the filter. The execution device calculates the PM amount based on the output of the mapping having the acquired data as an input.
    Type: Application
    Filed: February 4, 2020
    Publication date: August 20, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Harufumi Muto, Atsushi Nagai, Kohei Mori, Yosuke Hashimoto
  • Publication number: 20200263581
    Abstract: A catalyst temperature estimation device that estimates a temperature of a catalyst provided in an exhaust passage of an internal combustion engine includes a storage device and processing circuitry. The storage device stores mapping data that specifies a mapping that uses multiple input variables to output an estimation value of the temperature of the catalyst. The multiple input variables include at least one variable of an ambient temperature variable or an excess amount variable. The multiple input variables further include a fluid energy variable, which is a state variable related to energy of fluid flowing into the catalyst, and a previous cycle value of the estimation value of the temperature of the catalyst. The processing circuitry is configured to execute an acquisition process, a temperature calculation process, and an operation process. The mapping data includes data that is learned through machine learning.
    Type: Application
    Filed: February 4, 2020
    Publication date: August 20, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Harufumi MUTO, Atsushi NAGAI, Yosuke HASHIMOTO, Masakazu AOKI
  • Publication number: 20190292970
    Abstract: A catalyst state estimation apparatus includes a first sensor, a memory and a processor. The first sensor is configured to acquire information about a catalyst that removes a toxic substance in an exhaust gas, the first sensor being provided in a main passage into which the exhaust gas flows from an internal combustion engine. The memory is configured to previously store a catalyst state estimation model that includes at least one mathematical model. The processor is configured to estimate a removal performance of the catalyst by applying the information about the catalyst acquired by the first sensor to the catalyst state estimation model.
    Type: Application
    Filed: March 20, 2019
    Publication date: September 26, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takato IKEDO, Matsuei Ueda, Makoto Nagaoka, Harufumi Muto, Kohei Mori, Hitoshi Hosaki, Atsushi Nagai, Satoshi Takamoto
  • Publication number: 20180274428
    Abstract: A NOx sensor abnormality detector for a NOx sensor includes a measurement chamber, a pump cell, and a sensor cell. The NOx sensor abnormality detector includes a signal receiving section configured to receive the detection value of the sensor cell, a reduction process executing section configured to execute a reduction process that reduces the discharge function of the pump cell, and an abnormality determining section configured to perform abnormality determination of the NOx sensor. The NOx sensor abnormality detector is configured to execute abnormality detection control in which the abnormality determining section performs abnormality determination of the NOx sensor based on the detection value of the sensor cell, which is input to the signal receiving section, after the reduction process executing section starts the reduction process.
    Type: Application
    Filed: March 13, 2018
    Publication date: September 27, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yoshitaka NAKAMURA, Harufumi MUTO, Tomomi ONISHI, Yosuke HASHIMOTO, Koichi TSUJI
  • Patent number: 7703436
    Abstract: A control device of an internal combustion engine determining a target throttle opening degree based on a target intake air amount which can simply and reliably detect any control abnormality is provided. The control device of an internal combustion engine determining a target throttle opening degree based on a target intake amount compares the target intake air amount and an intake air amount measured by an air flow meter to detect a control abnormality. By this control device, it is possible to simply and reliably detect a control abnormality in the process of determination of the target throttle opening degree or control of the throttle valve.
    Type: Grant
    Filed: October 11, 2005
    Date of Patent: April 27, 2010
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Harufumi Muto, Yuichiro Ido
  • Patent number: 7424872
    Abstract: A failure diagnosis for a slide sensor of a variable valve mechanism is performed when a valve working angle is at a value in the initial state. The initial state is set to a valve characteristic state where the valve working angle is at the maximum value. The maximum valve working angle corresponds to the refuge running performable region in which an engine can be started and refuge running can be performed. Therefore, even when it is difficult to adjust the valve working angle using rotation of a spiral cam due to a failure in the slide sensor, the refuge running can be performed only by maintaining the initial state by maintaining control. It is thus possible to increase reliability of the refuge running in the case where a failure has occurred in the variable valve mechanism.
    Type: Grant
    Filed: January 14, 2005
    Date of Patent: September 16, 2008
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Naohide Fuwa, Harufumi Muto