Patents by Inventor Hideo Moriwaki

Hideo Moriwaki 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: 6694956
    Abstract: There is provided a control system for an internal combustion engine, which is capable of properly controlling the amount of exhaust gas recirculation according to a degree of flow rate degradation of an exhaust gas recirculation system and at the same time suppressing progress of the flow rate degradation. The control system has an exhaust gas recirculation system including an exhaust gas recirculation passage for communicating between an exhaust passage and an intake passage, and an exhaust gas recirculation valve for controlling the rate of exhaust gas recirculation to the intake passage via the exhaust gas recirculation passage according to the operation amount of the valve. An ECU cuts off supply of fuel to the engine during deceleration of the engine. An intake pipe absolute pressure sensor detects pressure within the intake passage.
    Type: Grant
    Filed: January 31, 2002
    Date of Patent: February 24, 2004
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Hiroshi Kawaguchi, Hideo Moriwaki
  • Patent number: 6609059
    Abstract: A control system for controlling an internal combustion engine having an exhaust gas recirculation mechanism consisting of an exhaust gas recirculation passage connected between the exhaust passage and the intake passage of the engine, and an exhaust gas recirculation valve provided in the recirculation passage for controlling an exhaust gas amount to be recirculated. Control parameter(s) of the engine are calculated according to operating conditions of the engine. An amount of change in the intake pressure between when opening the exhaust gas recirculation valve and when closing the exhaust gas recirculation valve, in the fuel-cut operation, is calculated. The abnormality of the exhaust gas recirculation mechanism is determined according to the amount of change in the intake pressure. The engine is controlled by using the control parameter suitable for a closed condition of the exhaust gas recirculation valve during a predetermined time period.
    Type: Grant
    Filed: June 15, 2001
    Date of Patent: August 19, 2003
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Hiroshi Kawaguchi, Hideo Moriwaki
  • Publication number: 20020139357
    Abstract: There is provided a control system for an internal combustion engine, which is capable of properly controlling the amount of exhaust gas recirculation according to a degree of flow rate degradation of an exhaust gas recirculation system and at the same time suppressing progress of the flow rate degradation. The control system has an exhaust gas recirculation system including an exhaust gas recirculation passage for communicating between an exhaust passage and an intake passage, and an exhaust gas recirculation valve for controlling the rate of exhaust gas recirculation to the intake passage via the exhaust gas recirculation passage according to the operation amount of the valve. An ECU cuts off supply of fuel to the engine during deceleration of the engine. An intake pipe absolute pressure sensor detects pressure within the intake passage.
    Type: Application
    Filed: January 31, 2002
    Publication date: October 3, 2002
    Applicant: HONDA GIKEN KOGYO KABUSHIKI KAISHA
    Inventors: Hiroshi Kawaguchi, Hideo Moriwaki
  • Publication number: 20010053954
    Abstract: A control system for controlling an internal combustion engine having an exhaust gas recirculation mechanism consisting of an exhaust gas recirculation passage connected between the exhaust passage and the intake passage of the engine, and an exhaust gas recirculation valve provided in the recirculation passage for controlling an exhaust gas amount to be recirculated. Control parameter(s) of the engine are calculated according to operating conditions of the engine. An amount of change in the intake pressure between when opening the exhaust gas recirculation valve and when closing the exhaust gas recirculation valve, in the fuel-cut operation, is calculated. The abnormality of the exhaust gas recirculation mechanism is determined according to the amount of change in the intake pressure. The engine is controlled by using the control parameter suitable for a closed condition of the exhaust gas recirculation valve during a predetermined time period.
    Type: Application
    Filed: June 15, 2001
    Publication date: December 20, 2001
    Applicant: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Hiroshi Kawaguchi, Hideo Moriwaki
  • Patent number: 5966930
    Abstract: A catalyst deterioration-determining system for an internal combustion engine has a catalyst arranged in the exhaust system, for purifying exhaust gases emitted from the engine, an oxygen concentration sensor arranged in the exhaust system at a location downstream of the catalyst, for detecting the concentration of oxygen present in the exhaust gases, and an ECU which controls the air-fuel ratio of an air-fuel mixture supplied to the engine in a feedback manner in response to the output from the oxygen concentration sensor. Determination of deterioration of the catalyst is carried out based on the output from the oxygen concentration sensor during execution of air-fuel ratio feedback control.
    Type: Grant
    Filed: August 20, 1997
    Date of Patent: October 19, 1999
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Gaku Hatano, Hideo Moriwaki, Yoshiaki Matsuzono, Sachito Fujimoto, Hisato Shimizu, Yuji Fujiki
  • Patent number: 5732687
    Abstract: An evaporative fuel-processing system for an internal combustion engine includes a canister for adsorbing evaporative fuel generated in the fuel tank, a charging passage connecting between the canister and the fuel tank, a purging passage connecting between the canister and the intake system of the engine, an open-to-atmosphere passage for communicating the canister with atmosphere, a charge control valve for selectively opening and closing the charging passage, a purge control valve for selectively opening and closing the purging passage, and a vent shut valve for selectively opening and closing the open-to-atmosphere valve, and a pressure sensor inserted in the charging passage at a location on one side of the charge control valve closer to the fuel tank, for detecting internal pressure within the charging passage. When predetermined conditions are satisfied, the purge control valve is closed and the charge control valve and the vent shut valve are opened.
    Type: Grant
    Filed: November 1, 1996
    Date of Patent: March 31, 1998
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Akira Hashimoto, Hideo Moriwaki, Shigeto Kashiwabara, Sachito Fujimoto
  • Patent number: 5690076
    Abstract: An evaporative fuel-processing system for an internal combustion engine has an evaporative emission control system. An ECU carries out negative pressurization of the interior of the evaporative emission control system, by opening a purge control valve and closing a vent shut valve, and determines presence/absence of leakage from the evaporative emission control system, based on a rate of decrease in negative pressure within the system, by closing a purge control valve. Before the negative pressurization, the interior of the evaporative emission control system is opened to the atmosphere, and during the open-to-atmosphere, a pressure state within the fuel tank is estimated based on a rate of change in an output from a pressure sensor which senses pressure within the evaporative emission control system. The ECU determines whether the evaporative emission control system is normal, based on the estimated pressure state.
    Type: Grant
    Filed: March 1, 1996
    Date of Patent: November 25, 1997
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Akira Hashimoto, Hideo Moriwaki, Yoshiaki Matsuzono, Sachito Fujimoto, Satoshi Kiso
  • Patent number: 5678523
    Abstract: An evaporative fuel-processing system for an internal combustion engine has an evaporative emission control system and a pressure sensor. An ECU carries out negative pressurization of the interior of the evaporative emission control system, by opening a purge control valve and closing a vent shut valve. The purge control valve is closed over a predetermined time period after the interior of the evaporative emission control system is brought into the predetermined negatively pressurized state, and a rate of decrease in negative pressure within the evaporative emission control system is detected. Then, it is determined whether or not there is leakage from the evaporative emission control system, based on the detected rate of decrease in the negative pressure, and at least one detected pressure value at at least one predetermined time point within the predetermined time period over which the purge control valve is closed.
    Type: Grant
    Filed: March 1, 1996
    Date of Patent: October 21, 1997
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Akira Hashimoto, Hideo Moriwaki, Yoshiaki Matsuzono, Sachito Fujimoto, Satoshi Kiso
  • Patent number: 5304235
    Abstract: A canister includes a casing, a fuel reserve well defined at the bottom of the casing, an adsorbent layer provided in the casing for adsorbing fuel vapor, the adsorbent layer communicating with the fuel reserve well at a region of its lower portion and communicating with an atmosphere at its upper portion, a first communication passage defined so that the fuel reserve well communicates with a fuel system of an engine, and a second communication passage defined so that the fuel reserve well communicates with an intake system o f the engine.
    Type: Grant
    Filed: April 2, 1992
    Date of Patent: April 19, 1994
    Assignees: Toyo Roki Seizo Kabushikikaisha, Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Hideo Watanabe, Masatoshi Udagawa, Naritoshi Muramatsu, Hideki Hoshino, Kazumi Yamazaki, Hideo Moriwaki, Atsushi Suzuki, Tsutomu Mori, Takenori Suzuki
  • Patent number: 5299544
    Abstract: An evaporative fuel-purging control system for an internal combustion engine includes at least one flowmeter arranged across a purging passage for outputting a detection parameter indicative of a flow rate of a gaseous mixtured purged through the purging passage, and a purge control valve arranged across the purging passage for controlling the flow rate of the gaseous mixture based on a control parameter indicative of a control amount for the purge control valve. One of the detection parameter and the control parameter is corrected based on a value of the one of the detection parameter and the control parameter assumed when the other of the detection parameter and the control parameter assumes a value corresponding to a state in which the flow rate of the gaseous mixture is equal to the minimum value.
    Type: Grant
    Filed: June 16, 1992
    Date of Patent: April 5, 1994
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Masakazu Kitamoto, Fumio Hosoda, Hideo Moriwaki, Kojiro Tsutsumi, Teruo Wakashiro, Toshikastu Takanohashi, Hiroshi Kitagawa
  • Patent number: 5224456
    Abstract: A starting fuel supply control system for an internal combustion engine having a purging passage connecting between a canister and an intake passage for purging a mixture of evaporative fuel from a fuel tank and air therethrough into the intake passage, and a purge control valve arranged across the purging passage for controlling the flow rate of the evaporative fuel to be supplied to the intake passage. An ECU detects a flow rate of an evaporative fuel component in the mixture flowing in the purging passage, and sets an amount of fuel to be supplied to the engine at the start thereof, based upon the detected flow rate of the evaporative fuel component.
    Type: Grant
    Filed: May 1, 1992
    Date of Patent: July 6, 1993
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Fumio Hosoda, Hideo Moriwaki, Masakazu Kitamoto, Sachito Fujimoto, Kazumi Yamazaki, Takashi Kiyomura
  • Patent number: 5216995
    Abstract: A mass flowmeter outputs an output value indicative of the flow rate of a gaseous mixture containing evaporative fuel and being purged into the intake system of an internal combustion engine. A calculated value of the flow rate of the mixture is obtained based on a plurality of operating parameters of the engine. The actual flow rate of the mixture and/or the actual flow rate of the evaporative fuel are/is calculated based on the output value from the mass flowmeter and the calculated value based on the engine operating parameters. The concentration of the evaporative fuel is calculated from the calculated actual flow rates of the evaporative fuel and the mixture. The calculated actual flow rate is compared with a desired flow rate value, and a purge control valve is controlled based on results of the comparison. A basic amount of fuel supplied to the engine is corrected based on the calculated actual flow rate of the evaporative fuel.
    Type: Grant
    Filed: May 1, 1992
    Date of Patent: June 8, 1993
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Fumio Hosoda, Sachito Fujimoto, Masashi Uchiyama, Toshikazu Oketani, Yoshiharu Abe, Kazumi Yamazaki, Teruo Wakashiro, Hideo Moriwaki
  • Patent number: 5195495
    Abstract: An evaporative fuel-purging control system for an internal combustion engine having a canister in which evaporative fuel from a fuel tank is adsorbed. One or more purging control valves are arranged across a purging pipe extending between the canister and an intake system. An ECU integrates an estimated value of a flow rate of evaporative fuel supplied to the engine, which is estimated as a purging flow rate in the purging pipe, in accordance with engine operating conditions when a specific one of the purging control valves is opened to thereby obtain an integrated purging flow rate value, and subtracts a predetermined decremental value from the integrated purging flow rate value when the specific one purging control valve is closed. When the integrated purging flow rate value is equal to or smaller than a predetermined lower limit value, the ECU decreases the flow rate of the evaporative fuel supplied to the intake system, based on the integrated purging flow rate value obtained above.
    Type: Grant
    Filed: July 29, 1992
    Date of Patent: March 23, 1993
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Masakazu Kitamoto, Fumio Hosoda, Hideo Moriwaki, Sachito Fujimoto
  • Patent number: 5188085
    Abstract: A device for measuring a flow rate of a mixture of evaporative fuel and air supplied to an internal combustion engine comprises a plurality of flowmeters arranged in a purging passage connecting between a canister and an intake passage of the engine for purging the mixture of evaporative fuel and air therethrough into the intake passage. The flowmeters have different output characteristics relative to concentration of the evaporative fuel in the mixture. At least one of the concentration of the evaporative fuel in the mixture and the volumetric flow rate of the mixture are detected based on outputs from the flowmeters. In an air-fuel ratio control system incorporating the above device, the weight per unit time of evaporative fuel supplied to the intake system is calculated from the detected concentration of the evaporative fuel and the detected volumetric flow rate of the mixture.
    Type: Grant
    Filed: March 18, 1992
    Date of Patent: February 23, 1993
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Masayuki Habaguchi, Toyohei Nakajima, Fumio Hosoda, Sachito Fujimoto, Masakazu Kitamoto, Hideo Moriwaki, Takefumi Nakamura
  • Patent number: 5176123
    Abstract: An evaporative fuel-purging control system for an internal combustion engine, which controls purging of a mixture of evaporative fuel from a fuel tank and air comprises a purge control valve arranged across a purging passage for controlling the flow rate of evaporative fuel from the fuel tank to an intake passage. The flow rate of evaporative fuel is detected and compared with a desired flow rate commensurate with an operating condition of the engine. The valve opening of the purge control valve is controlled in response to results of the comparison. The change rate of the valve opening is varied according to the concentration of evaporative fuel in the mixture. Specifically, the change rate is decreased as the evaporative fuel concentration is higher.
    Type: Grant
    Filed: May 1, 1992
    Date of Patent: January 5, 1993
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Fumio Hosoda, Sachito Fujimoto, Masakazu Kitamoto, Hideo Moriwaki, Takashi Kiyomiya, Koichi Hidano