Patents by Inventor Yuhei Matsushima

Yuhei Matsushima 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).

  • Patent number: 10648411
    Abstract: To provide a controller and a control method, for an internal combustion engine, that can detect occurrence of knocking appropriately, even though the frequency distribution of the knock signal is distorted according to the occurrence state of knocking. The controller for the internal combustion engine calculates the background level by processing a low pass filter to the knock signal; and performs a low side frequency increase which makes a low side frequency, which is a cutoff frequency of the low pass filter in the case where the knock signal is smaller than an output value of the low pass filter, higher than a high side frequency, which is a cutoff frequency of the low pass filter in the case where the knock signal is larger than the output value of the low pass filter.
    Type: Grant
    Filed: May 5, 2017
    Date of Patent: May 12, 2020
    Assignees: Mitsubishi Electric Corporation, MAZDA MOTOR CORPORATION
    Inventors: Yuhei Matsushima, Nobuhiko Yokoyama, Hiroki Morimoto
  • Patent number: 10626807
    Abstract: To provide a controller and a control method for an internal combustion engine capable of suppressing causing erroneous determination of combustion state even if noise component is superimposed on the ion current. In combustion state determination processing which determines combustion state of each combustion based on ion current, a controller for an internal combustion engine calculates a minimum value of ion current during a processing period, and prohibits determination of combustion state at a time point when the minimum value of ion current is below a preliminarily set determination prohibition threshold value.
    Type: Grant
    Filed: September 12, 2017
    Date of Patent: April 21, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yuhei Matsushima, Takahiko Inada
  • Patent number: 10451024
    Abstract: Knocking and pre-ignition are identified, without contributing to pre-ignition, even when vibration magnitudes and timings of occurrence of the knocking and pre-ignition are the same. When detecting an abnormal combustion that cannot be identified as a knocking or pre-ignition, ignition timing is advanced, at which time knocking is identified when an abnormal combustion intensity increases, and pre-ignition is identified when a difference between ignition timing and abnormal combustion occurrence timing increases.
    Type: Grant
    Filed: July 18, 2017
    Date of Patent: October 22, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Junichi Inoue, Yuhei Matsushima, Toshikatsu Saito
  • Patent number: 10280848
    Abstract: There is provided an internal combustion engine control apparatus that is capable of determining accurately from an ignition discharging time period whether the intake valve and the exhaust valve are in the operative condition or in the inoperative condition. A cylinder deactivation controller causes a first ignition controller to perform a first ignition control on the basis of the ignition timing when issuing no cylinder deactivation request, and causes a second ignition controller to perform a second ignition control on the basis of an energizing time period when issuing the cylinder deactivation controller. The discharging time period is calculated by a discharging time period calculation section on the basis of an ion current signal output from the ignition coil.
    Type: Grant
    Filed: March 6, 2015
    Date of Patent: May 7, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Yuhei Matsushima, Takahiko Inada
  • Patent number: 10197036
    Abstract: An operation status value detection unit detects two or more operation status values indicating an operation status of an internal combustion engine. A filtering processing unit applies filtering processing to the detected operation status values, and an operation status value difference calculation unit calculates the difference between the filter-processed operation status value and the corresponding non-filter-processed operation status value so as to calculate two or more operation status value differences. An operation status value difference normalization unit normalizes the two or more operation status value differences, based on predetermined reference values for the two or more operation status values, so as to calculate two or more normalized operation status value differences; and a transient correction unit corrects a control amount for controlling output of the internal combustion engine, based thereon, when the engine is in a transient-operation mode.
    Type: Grant
    Filed: November 7, 2011
    Date of Patent: February 5, 2019
    Assignees: Mitsubishi Electric Corporation, MAZDA MOTOR CORPORATION
    Inventors: Hideki Hagari, Yuhei Matsushima, Keitaro Ezumi, Tomokuni Kusunoki
  • Publication number: 20180306129
    Abstract: To provide a controller and a control method for an internal combustion engine capable of suppressing causing erroneous determination of combustion state even if noise component is superimposed on the ion current. In combustion state determination processing which determines combustion state of each combustion based on ion current, a controller for an internal combustion engine calculates a minimum value of ion current during a processing period, and prohibits determination of combustion state at a time point when the minimum value of ion current is below a preliminarily set determination prohibition threshold value.
    Type: Application
    Filed: September 12, 2017
    Publication date: October 25, 2018
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yuhei MATSUSHIMA, Takahiko INADA
  • Publication number: 20180298871
    Abstract: Knocking and pre-ignition are identified, without contributing to pre-ignition, even when vibration magnitudes and timings of occurrence of the knocking and pre-ignition are the same. When detecting an abnormal combustion that cannot be identified as a knocking or pre-ignition, ignition timing is advanced, at which time knocking is identified when an abnormal combustion intensity increases, and pre-ignition is identified when a difference between ignition timing and abnormal combustion occurrence timing increases.
    Type: Application
    Filed: July 18, 2017
    Publication date: October 18, 2018
    Applicant: Mitsubishi Electric Corporation
    Inventors: Junichi INOUE, Yuhei MATSUSHIMA, Toshikatsu SAITO
  • Patent number: 9957904
    Abstract: When the starting timing of a negative valve overlapping (NVO) period exists at the delayed-angle side of the starting timing of a first NVO period, fuel injection into a cylinder is not started; when the starting timing of an NVO period exists between the starting timing of the first NVO period and the starting timing of the second NVO period, fuel injection into the cylinder is started at a given timing that includes the exhaust top dead center; when the starting timing of an NVO period exists between the starting timing of the second NVO period and the starting timing of the third NVO period, fuel injection into the cylinder is started at a given timing that does not include the exhaust top dead center, and that exists at both the advanced-angle and delayed-angle sides of the exhaust top dead center.
    Type: Grant
    Filed: April 2, 2014
    Date of Patent: May 1, 2018
    Assignee: Mitsubishi Electric Corporation
    Inventors: Toshikatsu Saito, Yuhei Matsushima
  • Publication number: 20170350328
    Abstract: To provide a controller and a control method, for an internal combustion engine, that can detect occurrence of knocking appropriately, even though the frequency distribution of the knock signal is distorted according to the occurrence state of knocking. The controller for the internal combustion engine calculates the background level by processing a low pass filter to the knock signal; and performs a low side frequency increase which makes a low side frequency, which is a cutoff frequency of the low pass filter in the case where the knock signal is smaller than an output value of the low pass filter, higher than a high side frequency, which is a cutoff frequency of the low pass filter in the case where the knock signal is larger than the output value of the low pass filter.
    Type: Application
    Filed: May 5, 2017
    Publication date: December 7, 2017
    Applicants: Mitsubishi Electric Corporation, MAZDA MOTOR CORPORATION
    Inventors: Yuhei MATSUSHIMA, Nobuhiko YOKOYAMA, Hiroki MORIMOTO
  • Patent number: 9605643
    Abstract: There is provided a leakage detection apparatus that can accurately detect a leakage condition in an internal combustion engine having a cylinder resting function. An ignition plug provided in the combustion chamber of a cylinder is made to generate an ignition signal at least once when based on an instruction from a cylinder resting control unit, a fuel injection valve and a valve driving mechanism are stopping the operation thereof; the leakage condition of the ignition plug is detected based on an output signal generated by an ion current detection circuit at a timing other than the timing when ignition discharge is caused.
    Type: Grant
    Filed: April 6, 2015
    Date of Patent: March 28, 2017
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takahiko Inada, Takahiro Enomoto, Yuhei Matsushima, Takeshi Koda
  • Patent number: 9470163
    Abstract: A control apparatus for an internal combustion engine is capable of switching a combustion mode between a spark ignition combustion mode for combusting a mixture formed in a combustion chamber with spark ignition and a compression ignition combustion mode for combusting the mixture with compression ignition. When the combustion mode is switched from the spark ignition combustion mode to the compression ignition combustion mode, in an internal EGR control for keeping a part of a burnt gas generated by the combustion remaining as an internal EGR in the combustion chamber, an internal EGR amount of the internal EGR is increased, an ignition timing is advanced, and a fuel injection amount is decreased so that an oxygen density contained in the internal EGR used to form the mixture increases.
    Type: Grant
    Filed: July 28, 2014
    Date of Patent: October 18, 2016
    Assignee: Mitsubishi Electric Corporation
    Inventor: Yuhei Matsushima
  • Publication number: 20160201636
    Abstract: There is provided a leakage detection apparatus that can accurately detect a leakage condition in an internal combustion engine having a cylinder resting function. An ignition plug provided in the combustion chamber of a cylinder is made to generate an ignition signal at least once when based on an instruction from a cylinder resting control unit, a fuel injection valve and a valve driving mechanism are stopping the operation thereof; the leakage condition of the ignition plug is detected based on an output signal generated by an ion current detection circuit at a timing other than the timing when ignition discharge is caused.
    Type: Application
    Filed: April 6, 2015
    Publication date: July 14, 2016
    Applicant: Mitsubishi Electric Corporation
    Inventors: Takahiko INADA, Takahiro ENOMOTO, Yuhei MATSUSHIMA, Takeshi KODA
  • Patent number: 9382852
    Abstract: Provided is a control device for an internal combustion engine having a cylinder resting mechanism, capable of accurately detecting an intake/exhaust valve state and therefore serving to solve problems of fuel depletion and environmental conservation. The control device includes: ignition means 2 including high voltage means 202 for causing ignition discharge on an ignition plug based on an ignition signal, and an ignition discharge parameter detection circuit 203 for detecting a parameter indicating a state of the ignition discharge; and valve state determination means 206 for determining a valve operation state of an intake/exhaust valve based on at least one of an ignition discharge duration, ignition insulation breakdown voltage, and ignition discharge maintaining voltage detected based on an output signal from the ignition discharge parameter detection circuit 203. Operation of cylinder resting control means 207 is controlled based on a determination result by the valve state determination means 206.
    Type: Grant
    Filed: July 17, 2014
    Date of Patent: July 5, 2016
    Assignee: Mitsubishi Electric Corporation
    Inventors: Takahiko Inada, Takahiro Enomoto, Yuhei Matsushima
  • Publication number: 20160108824
    Abstract: There is provided an internal combustion engine control apparatus that is capable of determining accurately from an ignition discharging time period whether the intake valve and the exhaust valve are in the operative condition or in the inoperative condition. A cylinder deactivation controller causes a first ignition controller to perform a first ignition control on the basis of the ignition timing when issuing no cylinder deactivation request, and causes a second ignition controller to perform a second ignition control on the basis of an energizing time period when issuing the cylinder deactivation controller. The discharging time period is calculated by a discharging time period calculation section on the basis of an ion current signal output from the ignition coil.
    Type: Application
    Filed: March 6, 2015
    Publication date: April 21, 2016
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yuhei MATSUSHIMA, Takahiko INADA
  • Patent number: 9316556
    Abstract: A knock control apparatus for an internal combustion engine can remove regularly generated noise vibration in a simple and appropriate manner. The apparatus includes a knock sensor, a crank angle sensor, a vibration waveform detection unit that detects a vibration waveform of a knock natural frequency component, a vibration waveform average value calculation unit that calculates a vibration waveform average value corresponding to a noise vibration waveform by filtering the vibration waveform over a plurality of ignition cycles, a noise vibration waveform removal unit that removes the noise vibration waveform by subtracting the vibration waveform average value from the vibration waveform, a knock determination threshold value calculation unit that calculates a threshold value based on a peak value of the vibration waveform after removal of the noise vibration waveform, and a knock determination unit that determines whether a knock has occurred, by comparing the peak value with the threshold value.
    Type: Grant
    Filed: January 8, 2013
    Date of Patent: April 19, 2016
    Assignee: Mitsubishi Electric Corporation
    Inventor: Yuhei Matsushima
  • Patent number: 9212647
    Abstract: A vibration waveform of a knock-specific frequency component of an internal combustion engine is calculated over a plurality of ignition cycles of the internal combustion engine according to an output of a knock sensor and an output of a crank angle sensor. An actual ignition timing is calculated by detecting a position corresponding to a crank angle at which a standard deviation of the vibration waveform exceeds a predetermined first determination level as a vibration position by combustion of the internal combustion engine.
    Type: Grant
    Filed: March 19, 2013
    Date of Patent: December 15, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventor: Yuhei Matsushima
  • Publication number: 20150300271
    Abstract: Provided is a control device for an internal combustion engine having a cylinder resting mechanism, capable of accurately detecting an intake/exhaust valve state and therefore serving to solve problems of fuel depletion and environmental conservation. The control device includes: ignition means 2 including high voltage means 202 for causing ignition discharge on an ignition plug based on an ignition signal, and an ignition discharge parameter detection circuit 203 for detecting a parameter indicating a state of the ignition discharge; and valve state determination means 206 for determining a valve operation state of an intake/exhaust valve based on at least one of an ignition discharge duration, ignition insulation breakdown voltage, and ignition discharge maintaining voltage detected based on an output signal from the ignition discharge parameter detection circuit 203. Operation of cylinder resting control means 207 is controlled based on a determination result by the valve state determination means 206.
    Type: Application
    Filed: July 17, 2014
    Publication date: October 22, 2015
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Takahiko INADA, Takahiro ENOMOTO, Yuhei MATSUSHIMA
  • Patent number: 9164012
    Abstract: An internal combustion engine knock controlling apparatus is obtained that improves knock detection performance by making a correction period appropriate without performing matching, when calculating a transition correction factor for correcting a filter coefficient used for calculating a mean value and a standard deviation of a knock signal in a transitional operation state. A previous value of a filter coefficient for calculating a knock determination threshold value that has been corrected by a transition correction factor is used for a filter coefficient for calculating the transition correction factor so that the response characteristics are made equal between a filtering process used for calculating a transition correction factor for correcting a knock determination threshold value and a filtering process used for calculating the knock determination threshold value in a transition operation period.
    Type: Grant
    Filed: July 18, 2012
    Date of Patent: October 20, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventor: Yuhei Matsushima
  • Publication number: 20150136070
    Abstract: A control apparatus for an internal combustion engine is capable of switching a combustion mode between a spark ignition combustion mode for combusting a mixture formed in a combustion chamber with spark ignition and a compression ignition combustion mode for combusting the mixture with compression ignition. When the combustion mode is switched from the spark ignition combustion mode to the compression ignition combustion mode, in an internal EGR control for keeping a part of a burnt gas generated by the combustion remaining as an internal EGR in the combustion chamber, an internal EGR amount of the internal EGR is increased, an ignition timing is advanced, and a fuel injection amount is decreased so that an oxygen density contained in the internal EGR used to form the mixture increases.
    Type: Application
    Filed: July 28, 2014
    Publication date: May 21, 2015
    Applicant: Mitsubishi Electric Corporation
    Inventor: Yuhei MATSUSHIMA
  • Publication number: 20150114340
    Abstract: When the starting timing of an NVO period exists at the delayed-angle side of the starting timing of a first NVO period, fuel injection into a cylinder is not started; when the starting timing of an NVO period exists between the starting timing of the first NVO period and the starting timing of the second NVO period, fuel injection into the cylinder is started at a given timing that includes the exhaust top death center; when the starting timing of an NVO period exists between the starting timing of the second NVO period and the starting timing of the third NVO period, fuel injection into the cylinder is started at a given timing that does not include the exhaust top death center, and that exists at both the advanced-angle and delayed-angle sides of the exhaust top death center.
    Type: Application
    Filed: April 2, 2014
    Publication date: April 30, 2015
    Applicant: Mitsubishi Electric Corporation
    Inventors: Toshikatsu SAITO, Yuhei MATSUSHIMA