Patents by Inventor Kazuki Nishizawa
Kazuki Nishizawa 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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Publication number: 20230279798Abstract: A regeneration control apparatus for controlling, in an exhaust gas treatment apparatus of a diesel engine including a diesel oxidation catalyst (DOC) disposed in an exhaust passage of an internal combustion engine and a diesel particulate filter (DPF) disposed downstream of the DOC, execution of forced regeneration to remove an exhaust particulate matter (PM) which accumulates on the DPF through a temperature increase of the DPF, includes: a late-post injection amount determination part which determines a late-post injection amount. The late-post injection amount determination part is configured to determine an upper limit value of the late-post injection amount on the basis of an air excess ratio of exhaust gas flowing into the DOC obtained on the basis of a temperature index of the DOC.Type: ApplicationFiled: July 20, 2021Publication date: September 7, 2023Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Kazuki NISHIZAWA, Kazutoshi NOMURA, Tomohide YAMADA, Ryuji KITA, Mizuki KANAI
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Patent number: 11530631Abstract: An engine oil state control device for controlling a fuel mixture ratio of a fuel mixed in an engine oil of an engine on which a predetermined combustion control is performed includes comprising a fuel mixture ratio acquisition part configured to acquire the fuel mixture ratio, and an oil temperature rise control part configured to perform an oil temperature rise control for increasing an evaporation rate of the fuel mixed in the engine oil if the fuel mixture ratio is equal to or greater than a first threshold.Type: GrantFiled: October 27, 2017Date of Patent: December 20, 2022Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Takayuki Yamamoto, Takuya Kumagai, Tomohide Yamada, Kazuki Nishizawa
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Patent number: 11441472Abstract: A control device is configured to direct an opening degree of a throttle valve disposed in an intake passage or an exhaust passage of an engine including a DOC disposed in the exhaust passage and a DPF disposed downstream of the DOC in the exhaust passage. The control device includes: a hysteresis occurring condition determination unit configured to determine whether a hysteresis occurring condition (predetermined time elapses after instructed opening degree of throttle valve becomes equal to or smaller than predetermined opening degree and/or predetermined time elapses after engine output becomes equal to or smaller than predetermined output) is met; and a hysteresis elimination execution unit configured to cause, if it is determined that the hysteresis occurring condition is met, the throttle valve to execute hysteresis elimination that involves temporarily increasing the opening degree of the throttle valve from the instructed opening degree and then returning it to the instructed opening degree.Type: GrantFiled: August 2, 2019Date of Patent: September 13, 2022Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Daisuke Sato, Tomohide Yamada, Mizuki Kanai, Kazuki Nishizawa, Kazutoshi Nomura
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Patent number: 11365659Abstract: An ECU 10 for controlling execution of forced regeneration that removes PM deposited on a DPF by increasing a temperature of the DPF in an exhaust gas treatment device of a diesel engine including a DOC disposed in an exhaust passage and the DPF disposed downstream of the DOC includes: a determination unit 102 for determining whether an injection start condition corresponding to a remaining SOF deposition amount on the DOC is satisfied after the forced regeneration starts and after an upstream temperature of the DOC reaches a predetermined temperature; and an injection execution unit 104 for starting late-post injection of fuel to the DOC when the injection start condition is satisfied.Type: GrantFiled: August 14, 2019Date of Patent: June 21, 2022Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Kazuki Nishizawa, Daisuke Sato
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Patent number: 11346263Abstract: An ECU 10 includes a valve control unit 101 for throttling a valve opening of at least one of an intake throttle valve or an exhaust throttle valve so that an upstream temperature of a DOC reaches a predetermined temperature; and a deposition condition determination unit 105 for determining whether a deposition condition that a SOF deposition amount on the DOC exceeds a predetermined deposition amount is satisfied. The valve control unit 101 includes a throttle amount decrease control execution unit 102 for executing throttle amount decrease control to decrease a throttle amount of the valve opening when the deposition condition is satisfied to be smaller than when the deposition condition is not satisfied.Type: GrantFiled: August 14, 2019Date of Patent: May 31, 2022Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Kazuki Nishizawa, Daisuke Sato
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Patent number: 11293320Abstract: Provided is a control device configured to be able to execute a forced regeneration process in an engine which includes a DOC and DPF disposed in an exhaust passage of the engine, and a temperature increase unit including an exhaust throttle valve, for increasing a temperature of each of the DOC and the DPF. The forced regeneration process includes a first temperature increase process of controlling the temperature increase unit such that the temperature of the DOC is increased to a first temperature, and a second temperature increase process of controlling the temperature increase unit such that the temperature of the DPF is increased to a second temperature which is higher than the first temperature after completion of the first temperature increase process.Type: GrantFiled: August 28, 2019Date of Patent: April 5, 2022Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Daisuke Sato, Mizuki Kanai, Kazuki Nishizawa
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Publication number: 20210310390Abstract: Provided is a control device configured to be able to execute a forced regeneration process in an engine which includes a DOC and DPF disposed in an exhaust passage of the engine, and a temperature increase unit including an exhaust throttle valve, for increasing a temperature of each of the DOC and the DPF. The forced regeneration process includes a first temperature increase process of controlling the temperature increase unit such that the temperature of the DOC is increased to a first temperature, and a second temperature increase process of controlling the temperature increase unit such that the temperature of the DPF is increased to a second temperature which is higher than the first temperature after completion of the first temperature increase process.Type: ApplicationFiled: August 28, 2019Publication date: October 7, 2021Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Daisuke SATO, Mizuki KANAI, Kazuki NISHIZAWA
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Publication number: 20210301707Abstract: A control device is configured to direct an opening degree of a throttle valve disposed in an intake passage or an exhaust passage of an engine including a DOC disposed in the exhaust passage and a DPF disposed downstream of the DOC in the exhaust passage. The control device includes: a hysteresis occurring condition determination unit configured to determine whether a hysteresis occurring condition (predetermined time elapses after instructed opening degree of throttle valve becomes equal to or smaller than predetermined opening degree and/or predetermined time elapses after engine output becomes equal to or smaller than predetermined output) is met; and a hysteresis elimination execution unit configured to cause, if it is determined that the hysteresis occurring condition is met, the throttle valve to execute hysteresis elimination that involves temporarily increasing the opening degree of the throttle valve from the instructed opening degree and then returning it to the instructed opening degree.Type: ApplicationFiled: August 2, 2019Publication date: September 30, 2021Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Daisuke SATO, Tomohide YAMADA, Mizuki KANAI, Kazuki NISHIZAWA, Kazutoshi NOMURA
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Publication number: 20210254524Abstract: An ECU 10 includes a valve control unit 101 for throttling a valve opening of at least one of an intake throttle valve or an exhaust throttle valve so that an upstream temperature of a DOC reaches a predetermined temperature; and a deposition condition determination unit 105 for determining whether a deposition condition that a SOF deposition amount on the DOC exceeds a predetermined deposition amount is satisfied. The valve control unit 101 includes a throttle amount decrease control execution unit 102 for executing throttle amount decrease control to decrease a throttle amount of the valve opening when the deposition condition is satisfied to be smaller than when the deposition condition is not satisfied.Type: ApplicationFiled: August 14, 2019Publication date: August 19, 2021Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Kazuki NISHIZAWA, Daisuke SATO
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Publication number: 20210207510Abstract: An ECU 10 for controlling execution of forced regeneration that removes PM deposited on a DPF by increasing a temperature of the DPF in an exhaust gas treatment device of a diesel engine including a DOC disposed in an exhaust passage and the DPF disposed downstream of the DOC includes: a determination unit 102 for determining whether an injection start condition corresponding to a remaining SOF deposition amount on the DOC is satisfied after the forced regeneration starts and after an upstream temperature of the DOC reaches a predetermined temperature; and an injection execution unit 104 for starting late-post injection of fuel to the DOC when the injection start condition is satisfied.Type: ApplicationFiled: August 14, 2019Publication date: July 8, 2021Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Kazuki NISHIZAWA, Daisuke SATO
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Patent number: 10871095Abstract: A regeneration control device controlling a temperature increase unit of an exhaust gas treatment device including a DOC disposed in an exhaust passage of a diesel engine to regenerate the exhaust gas treatment device includes: a DOC temperature-increase-necessary-state detection part detecting a temperature increase necessary state including at least one of a blockage state, detected on the basis of comparison between a blockage parameter related to blockage of the DOC and a predetermined blockage threshold, of the DOC or a blockage risk state, detected when the diesel engine is in an operating state that is likely to cause blockage of the DOC, of the DOC; and a DOC temperature increase execution part executing a DOC temperature increase control including: a first temperature increase process to control the temperature increase unit, if the temperature increase necessary state of the DOC is detected, so as to increase the temperature of the DOC to a first temperature at which the DOC activates; and a secondType: GrantFiled: June 30, 2016Date of Patent: December 22, 2020Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Kazuki Nishizawa, Tomohide Yamada, Daisuke Sato, Yasuhiro Hattori
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Publication number: 20200224564Abstract: An engine oil state control device for controlling a fuel mixture ratio of a fuel mixed in an engine oil of an engine on which a predetermined combustion control is performed includes comprising a fuel mixture ratio acquisition part configured to acquire the fuel mixture ratio, and an oil temperature rise control part configured to perform an oil temperature rise control for increasing an evaporation rate of the fuel mixed in the engine oil if the fuel mixture ratio is equal to or greater than a first threshold.Type: ApplicationFiled: October 27, 2017Publication date: July 16, 2020Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Takayuki YAMAMOTO, Takuya KUMAGAI, Tomohide YAMADA, Kazuki NISHIZAWA
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Patent number: 10641155Abstract: A regeneration control device for an exhaust gas treatment device includes: a DOC blockage risk state determination part configured to determine whether the DOC is in a blockage risk state which is a state where blockage of the DOC is likely to occur, on the basis of comparison between a counter value and a threshold related to an operation time of the diesel engine; a DOC temperature increase execution part configured to execute a blockage recovery process for increasing a temperature of the DOC to a first temperature, if it is determined that the DOC is in the blockage risk state; a DPF forced regeneration condition determination part configured to determine whether a forced regeneration execution condition for the DPF is satisfied; a DPF forced regeneration execution part configured to execute a forced regeneration process for increasing a temperature of the DPF to a second temperature and increasing the temperature of the DOC to the first temperature, if the forced regeneration execution condition is satiType: GrantFiled: January 26, 2017Date of Patent: May 5, 2020Assignee: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Kazuki Nishizawa, Tomohide Yamada, Daisuke Sato, Hiroyuki Ito
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Publication number: 20190162092Abstract: A regeneration control device controlling a temperature increase unit of an exhaust gas treatment device including a DOC disposed in an exhaust passage of a diesel engine to regenerate the exhaust gas treatment device includes: a DOC temperature-increase-necessary-state detection part detecting a temperature increase necessary state including at least one of a blockage state, detected on the basis of comparison between a blockage parameter related to blockage of the DOC and a predetermined blockage threshold, of the DOC or a blockage risk state, detected when the diesel engine is in an operating state that is likely to cause blockage of the DOC, of the DOC; and a DOC temperature increase execution part executing a DOC temperature increase control including: a first temperature increase process to control the temperature increase unit, if the temperature increase necessary state of the DOC is detected, so as to increase the temperature of the DOC to a first temperature at which the DOC activates; and a secondType: ApplicationFiled: June 30, 2016Publication date: May 30, 2019Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Kazuki NISHIZAWA, Tomohide YAMADA, Daisuke SATO, Yasuhiro HATTORI
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Publication number: 20190024566Abstract: A regeneration control device for an exhaust gas treatment device includes: a DOC blockage risk state determination part configured to determine whether the DOC is in a blockage risk state which is a state where blockage of the DOC is likely to occur, on the basis of comparison between a counter value and a threshold related to an operation time of the diesel engine; a DOC temperature increase execution part configured to execute a blockage recovery process for increasing a temperature of the DOC to a first temperature, if it is determined that the DOC is in the blockage risk state; a DPF forced regeneration condition determination part configured to determine whether a forced regeneration execution condition for, the DPF is satisfied; a DPF forced regeneration execution part configured to execute a forced regeneration process for increasing a temperature of the DPF to a second temperature and increasing the temperature of the DOC to the first temperature, if the forced regeneration execution condition is satType: ApplicationFiled: January 26, 2017Publication date: January 24, 2019Applicant: MITSUBISHI HEAVY INDUSTRIES ENGINE & TURBOCHARGER, LTD.Inventors: Kazuki NISHIZAWA, Tomohide YAMADA, Daisuke SATO, Hiroyuki ITO
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Publication number: 20170312689Abstract: An exhaust gas treatment device capable of treating exhaust gas of a gas turbine or a gas engine includes an exhaust gas treatment catalyst comprising a perovskite composite oxide containing at least Ag and Dy in an A site and at least Mn in a B site.Type: ApplicationFiled: September 16, 2015Publication date: November 2, 2017Inventors: Masatoshi KATSUKI, Shuuji FUJII, Kazuki NISHIZAWA
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Patent number: 9719440Abstract: An object is to provide a DPF regeneration control device whereby it is possible to prevent clogging of a DOC more efficiently than conventional techniques, and to recover the DOC securely from a clogging condition even if the DOC is actually clogged.Type: GrantFiled: September 8, 2014Date of Patent: August 1, 2017Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Kazuki Nishizawa, Tomohide Yamada, Daisuke Sato
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Patent number: 9416744Abstract: An object is to prevent excessive temperature rise in a DPF during forced regeneration so that the DPF is prevented from being damaged by heat erosion or cracking and preventing a frequency of the forced regeneration from increasing so that degradation of fuel efficiency and oil dilution are reduced, in an exhaust gas purification device which removes PM in exhaust gas.Type: GrantFiled: November 7, 2012Date of Patent: August 16, 2016Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Kazuki Nishizawa, Daisuke Sato, Tomohide Yamada
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Publication number: 20160222900Abstract: An object is to provide a DPF regeneration control device whereby it is possible to prevent clogging of a DOC more efficiently than conventional techniques, and to recover the DOC securely from a clogging condition even if the DOC is actually clogged.Type: ApplicationFiled: September 8, 2014Publication date: August 4, 2016Inventors: Kazuki Nishizawa, Tomohide Yamada, Daisuke Sato
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Publication number: 20150260119Abstract: An object is to prevent excessive temperature rise in a DPF during forced regeneration so that the DPF is prevented from being damaged by heat erosion or cracking and preventing a frequency of the forced regeneration from increasing so that degradation of fuel efficiency and oil dilution are reduced, in an exhaust gas purification device which removes PM in exhaust gas.Type: ApplicationFiled: November 7, 2012Publication date: September 17, 2015Inventors: Kazuki Nishizawa, Daisuke Sato, Tomohide Yamada