Patents by Inventor Takafumi Nishio

Takafumi Nishio 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: 20200132001
    Abstract: A controller increases an actual oil pressure up to a transient oil pressure (an actuating oil pressure) and then supplies oil adjusted to have the transient oil pressure (the actuating oil pressure) to valve stopping mechanisms to actuate the valve stopping mechanisms. The controller, when actuating the valve stopping mechanisms, starts increase in an intake filling amount when the actual oil pressure increases up to a predetermined determination value set at the transient oil pressure (the actuating oil pressure) or lower.
    Type: Application
    Filed: February 20, 2018
    Publication date: April 30, 2020
    Applicant: Mazda Motor Corporation
    Inventors: Takafumi NISHIO, Takahiro YAMAMOTO, Toshiaki NISHIMOTO, Masanori HASHIMOTO
  • Publication number: 20200123959
    Abstract: The control section of a control apparatus executes a first control for operating a voltage application section such as to cause a current to flow in a first direction through a gas sensor in a first period, and a second control for operating the voltage application section such as to cause a current to flow in a second direction, opposite to the first direction, through the gas sensor in a second period. The control apparatus changes the length of at least one of the first period and the second period based on a comparison between a first measurement value, which is the absolute value of a value measured by a sweep measurement section during execution of the first control, and a second measurement value, which is the absolute value of a value measured by the sweep measurement section during execution of the second control.
    Type: Application
    Filed: March 15, 2018
    Publication date: April 23, 2020
    Inventors: Tooru MATSUMOTO, Katsuhide AKIMOTO, Takahito MASUKO, Keita TAKAGI, Tatsuhiro ITO, Yuki SATO, Ryo TERAMOTO, Takafumi NISHIO
  • Patent number: 10600949
    Abstract: A thermoelectric converter includes a first substrate, a second substrate, a plurality of thermoelectric conversion elements, and a group of electrodes. The plurality of thermoelectric conversion elements are disposed between the first substrate and the second substrate. The group of electrodes electrically interconnect the plurality of thermoelectric conversion elements. The plurality of thermoelectric conversion elements are arranged in a plurality of rows including a first row and a second row. The first row is adjacent to the second row. The group of electrodes includes a first electrode and a second electrode having a different shape from the first electrode. The second electrode includes a first notch and a second notch each of which is disposed on an edge of the second electrode. The first notch is disposed to separate one of the plurality of thermoelectric conversion elements in the first row and one of the plurality of thermoelectric conversion elements in the second row.
    Type: Grant
    Filed: October 17, 2018
    Date of Patent: March 24, 2020
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Takafumi Shingai, Tetsuya Nishio
  • Publication number: 20200080989
    Abstract: Provided is an exhalation sensor that utilizes heat effectively and can operate with low power consumption. The exhalation sensor has a surface layer on its surface that faces a sensor main body, and the performance of the surface layer to reflect radiant heat is higher than that of a housing. Specifically the radiant heat reflectivity of the surface layer is higher than that of the housing. Therefore, the surface layer can reflect radiant heat emitted from the sensor main body more efficiently than the housing. The radiant heat emitted from the sensor main body is less likely to escape to the outside of the housing, so that the heat generated by a heater of the sensor main body can be efficiently stored within the housing. This can reduce the power consumed by the heater to heat a conversion section and a sensing section to their operating temperatures.
    Type: Application
    Filed: October 27, 2017
    Publication date: March 12, 2020
    Applicant: NGK SPARK PLUG CO., LTD.
    Inventors: Takafumi SHICHIDA, Kenji NISHIO, Masatoshi UEKI, Tsuyoshi INOUE
  • Patent number: 10584655
    Abstract: An exhaust passage 53 includes: a first passage (high-speed passages 24b, 25b, and 26b); and a second passage (low-speed passages 24c, 25c, and 26c). A turbine housing 560 is connected to the exhaust passage 53 downstream from the collector 54. An exhaust device 100 of an engine 1 includes a valve (an exhaust variable valve 3) to open and close the first passage. A controller (an engine controller 7) closes the valve if an engine speed of the engine 1 is lower than a predetermined engine speed and opens the valve if the engine speed of the engine 1 is higher than or equal to the predetermined engine speed. The controller opens the valve even though the engine speed of the engine 1 is lower than the predetermined engine speed if performing the fuel cut control.
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: March 10, 2020
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Mitsuyuki Murotani, Takafumi Nishio, Shuhei Tsujita, Einosuke Suekuni, Junji Umemura
  • Publication number: 20200047486
    Abstract: A cooling device includes a cylindrical body having thermal conductivity, a plurality of thermoelectric converters, and a feeder cable. The plurality of thermoelectric converters are arranged along a periphery of the cylindrical body and disposed dispersedly along an axis of the cylindrical body. The feeder cable connects two or more thermoelectric converters arranged along the periphery of the cylindrical body in series among the plurality of thermoelectric converters to form each of a plurality of sets of thermoelectric converters. And the feeder cable forms a circuit for power feeding of the each of the plurality of sets of thermoelectric converters. A voltage is applied individually to each of circuits that includes the circuit so that thermoelectric converters of the each of the circuits in the plurality of thermoelectric converters are driven.
    Type: Application
    Filed: October 31, 2017
    Publication date: February 13, 2020
    Inventors: TAKAFUMI SHINGAI, ETSUO KATOU, TETSUYA NISHIO, EIJI OKUZONO
  • Publication number: 20200049115
    Abstract: An estimation unit estimates a fuel pressure on a discharge side of a high-pressure pump based on an amount of fuel injection with a fuel injection valve from a time point at which a detected fuel pressure changes from a higher status than a first pressure to a lower status, assuming that the fuel has not been discharged with the high-pressure pump. The determination unit determines that a relief valve is in an open status based on a dropping mode of the estimated fuel pressure and a dropping mode of the detected fuel pressure.
    Type: Application
    Filed: October 22, 2019
    Publication date: February 13, 2020
    Inventors: Yuri SAKAMOTO, Tomohiro KANAYA, Takafumi NISHIO
  • Publication number: 20200049031
    Abstract: An engine includes a variable valve timing (VVT) mechanism that changes an opening timing or a closing timing of at least one of an intake valve or an exhaust valve in accordance with an operating region of the engine, and an oil jet that injects oil in a piston direction under a pressure of a first predetermined oil pressure or more. The control device of the engine controls supply of an oil pressure to the VVT mechanism in such a manner that an upper limit of an oil pressure used by the VVT mechanism is set to be lower than a first predetermined oil pressure and an operating speed of the VVT mechanism is high in a direction in which an overlap amount between open periods between an intake valve and an exhaust valve increases and is low in a direction in which the overlap amount decreases.
    Type: Application
    Filed: October 28, 2016
    Publication date: February 13, 2020
    Inventors: Toshiaki Nishimoto, Takafumi Nishio, Toshiki Inoki
  • Publication number: 20200011253
    Abstract: A control device for an engine includes a valve-stopping mechanism 14b which holds intake and exhaust valves 41, 51 of the first and the fourth cylinders (idle cylinders) of four cylinders in closed states, a throttle valve control unit 115, an ignition period control unit 113, and an ECU 110 which controls the valve-stopping mechanism 14b, the throttle valve control unit 115, and the ignition period control unit 113. The ECU 110 sets a retard amount of the ignition period of the idle cylinder behind the basic ignition period at least in starting the all-cylinder operation in accordance with an amount of burned gas existing in the idle cylinder in switching to the all-cylinder operation from the reduced-cylinder operation.
    Type: Application
    Filed: March 19, 2018
    Publication date: January 9, 2020
    Applicant: Mazda Motor Corporation
    Inventors: Takano NAKAI, Takaya OKUGAWA, Souichirou CHABATA, Takafumi NISHIO
  • Publication number: 20190376439
    Abstract: Provided is an engine cooling apparatus capable of preventing deterioration in reliability of a cylinder head of an engine during cold engine operation. The engine cooling apparatus comprises an engine cooling water path, a heater core cooling path, and a radiator cooling water path, and further comprises a switching valve for switching among these cooling water paths. The switching valve is operable, when the temperature of an area around an exhaust valve is raised to a value greater than, e.g., 150° C., even in a situation where the temperature of cooling water for cooling the engine is equal to or less than, e.g., 50° C., to switch from the in-engine cooling water path to the heater core cooling water path.
    Type: Application
    Filed: February 21, 2018
    Publication date: December 12, 2019
    Applicant: Mazda Motor Corporation
    Inventors: Takayoshi Fujita, Takafumi Nishio, Kouichi Miyamoto, Tatsuya Takahata, Yasushi Nakahara, Akihiro Noda
  • Publication number: 20190351672
    Abstract: A roller device includes a roller, an electronic device, a slip ring, a hood member, and a duct. The electronic device is disposed in an interior of the roller. The slip ring supplies electric power to the electronic device. The hood member covers a region between a rotating shaft of the slip ring and an end portion of the roller. The duct covers the slip ring, and extends in a direction away from the roller.
    Type: Application
    Filed: December 18, 2017
    Publication date: November 21, 2019
    Applicant: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Etsuo KATOU, Takafumi SHINGAI, Eiji OKUZONO, Tetsuya NISHIO
  • Patent number: 10436106
    Abstract: A required opening correction amount is calculated based on a target supercharging pressure and an actual supercharging pressure, a target opening is calculated based on a required opening and the required opening correction amount, an actual operating position of a wastegate valve is determined to correspond to a fully closed position when the wastegate valve is in a fully closed condition, an actual opening of the wastegate valve is calculated based on the fully closed position and the actual operating position, an operation amount of an actuator for aligning the target opening with the actual opening is calculated based on the target opening and the actual opening, and when the target opening corresponds to the fully closed condition and the actual operating position is not decreased at or above a prescribed rate, the fully closed position is updated to the actual operating position.
    Type: Grant
    Filed: September 19, 2016
    Date of Patent: October 8, 2019
    Assignees: Mitsubishi Electric Corporation, MAZDA MOTOR CORPORATION
    Inventors: Takahiko Ono, Takafumi Nishio
  • Publication number: 20190265180
    Abstract: Disclosed is a gas sensor including: a wiring board; a sensor element mounted on the wiring board and electrically connected to the wiring board by conductive members; a casing installing the sensor element and formed with inlet and outlet ports; and a pretreatment unit configured to perform pretreatment on a measurement gas and feed the measurement gas to the inlet port. The inlet and outlet ports are located outward and upward of the sensor element. A protrusion is provided protruding toward the inside of the casing so as to narrow a flow path from the inlet port to the outlet port. A height from the sensor element to a distal end of the protrusion is lower than heights from the sensor element to the inlet and outlet ports. The protrusion is disposed more inside than respective top portions of the conductive members without being in contact with the conductive members.
    Type: Application
    Filed: October 31, 2017
    Publication date: August 29, 2019
    Applicant: NGK SPARK PLUG CO., LTD
    Inventors: Tsuyoshi INOUE, Masatoshi UEKI, Takafumi SHICHIDA, Kenji NISHIO, Shigeya AOYAMA
  • Publication number: 20190242315
    Abstract: In a predetermined operating region, a fuel injection valve executes a second injection to inject fuel into a cylinder in a compression stroke, and a first injection to inject fuel into the cylinder 2 in the compression stroke or an intake stroke before the second injection. When a purge is executed, the total quantity of fuel to be injected by the fuel injection valve into the cylinder is reduced more than when the purge is not executed, and a fuel reduction quantity of the second injection is made smaller than a fuel reduction quantity of the first injection.
    Type: Application
    Filed: October 5, 2017
    Publication date: August 8, 2019
    Inventors: Satoshi Watanabe, Takafumi Nishio, Kazuhiro Nishimura
  • Patent number: 10309298
    Abstract: To improve the controllability of the feedback control of the boost pressure, an ECU comprises a valve control part that feedback controls a boost pressure of a turbocharger based on a deviation between a target boost pressure and an actual boost pressure, and a determination part that determines whether or not the exhaust state in an exhaust passage can achieve the target boost pressure, and the feedback control includes at least an integral term, and when the determination part determines the exhaust state cannot achieve the target boost pressure, the valve control part reduces the influence of the deviation on the calculation of integral term compared with that when the exhaust state can achieve the target boost pressure.
    Type: Grant
    Filed: July 22, 2016
    Date of Patent: June 4, 2019
    Assignee: Mazda Motor Corporation
    Inventor: Takafumi Nishio
  • Patent number: 10208661
    Abstract: When it is detected that an exhaust cut valve is stuck in a closed state, a control device stops feedback control and maintains a wastegate valve in a completely open state in each of an open operation range and a closed operation range. When it is detected that the exhaust cut valve is stuck in an open state, the control device stops the feedback control and maintains the wastegate valve in the completely open state in the closed operation range, whereas the control device performs the feedback control in the open operation range.
    Type: Grant
    Filed: February 18, 2015
    Date of Patent: February 19, 2019
    Assignee: Mazda Motor Corporation
    Inventor: Takafumi Nishio
  • Patent number: 10100722
    Abstract: A control method of a turbocharged engine includes: a bypass passage bypassing a compressor; and a bypass valve configured to open and close the bypass passage. The method includes: a compressor flow rate predicting step of predicting a flow rate of air flowing through the compressor after a predetermined time; a compressor pressure ratio detecting step of detecting a pressure ratio of the compressor; a surging determining step of determining whether or not surging occurs after the predetermined time, in reference to preliminary prepared surging determination data based on the compressor predicted flow rate and the compressor pressure ratio; and a bypass valve controlling step of opening the bypass valve when it is determined in the surging determining step that the surging occurs and closing the bypass valve when it is determined in the surging determining step that the surging does not occur.
    Type: Grant
    Filed: February 6, 2015
    Date of Patent: October 16, 2018
    Assignee: Mazda Motor Corporation
    Inventors: Takafumi Nishio, Masayoshi Higashio, Yugou Sunagare
  • Publication number: 20180283303
    Abstract: An exhaust passage 53 includes: a first passage (high-speed passages 24b, 25b, and 26b); and a second passage (low-speed passages 24c, 25c, and 26c). A turbine housing 560 is connected to the exhaust passage 53 downstream from the collector 54. An exhaust device 100 of an engine 1 includes a valve (an exhaust variable valve 3) to open and close the first passage. A controller (an engine controller 7) closes the valve if an engine speed of the engine 1 is lower than a predetermined engine speed and opens the valve if the engine speed of the engine 1 is higher than or equal to the predetermined engine speed. The controller opens the valve even though the engine speed of the engine 1 is lower than the predetermined engine speed if performing the fuel cut control.
    Type: Application
    Filed: March 8, 2017
    Publication date: October 4, 2018
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Mitsuyuki MUROTANI, Takafumi NISHIO, Shuhei TSUJITA, Einosuke SUEKUNI, Junji UMEMURA
  • Patent number: 10012164
    Abstract: A control apparatus of an engine including intake and exhaust valves and a variable valve timing mechanism for varying open and close timings is provided. The apparatus includes a processor configured to execute an increasing amount controlling module for performing a fuel amount increase control in which a fuel injection amount is increased to decrease an exhaust gas temperature, and a valve controlling module for controlling, via the variable valve timing mechanism, an overlapping period in which the intake and exhaust valves are both opened on intake stroke. When the increasing amount controlling module performs the increase control, based on an increase of a temperature of the exhaust gas in the increase control, the valve controlling module determines whether a protection for an exhaust system component is required, and if the protection is determined to be required, the valve controlling module shortens the overlapping period.
    Type: Grant
    Filed: September 9, 2016
    Date of Patent: July 3, 2018
    Assignee: Mazda Motor Corporation
    Inventors: Takafumi Nishio, Shin Miura, Kazuhiro Nishimura
  • Patent number: 10006351
    Abstract: A controller is provided, which detects operating conditions of an internal combustion engine on the basis of detection results from a group of sensors and drives an actuator that modifies an opening position of a wastegate valve on the basis of the operating conditions. When driving the wastegate valve to a fully closed opening, the controller initially drives the actuator toward a preset provisional fully closed position, and after determining on the basis of a detection result from a position sensor that an actual opening of the wastegate valve has reached the provisional fully closed opening, switches a target opening to the fully closed opening and drives the actuator accordingly.
    Type: Grant
    Filed: September 12, 2016
    Date of Patent: June 26, 2018
    Assignees: Mitsubishi Electric Corporation, MAZDA MOTOR CORPORATION
    Inventors: Toshiaki Maruo, Takahiko Ono, Takafumi Nishio