Patents by Inventor Kiyoshi Kuronishi

Kiyoshi Kuronishi 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).

  • Exhaust purification apparatus for an engine
    Patent number: 5311737
    Abstract: An exhaust purification apparatus for an engine uses a catalytic converter provided in an exhaust system of the engine. First and second exhaust sensors are provided on upstream and downstream sides, respectively, of the catalyst converter in the exhaust system. Detected values from the first and second exhaust sensors are used for feed back control of air fuel ratio and judging deterioration of the catalyst of the catalytic converter, respectively. A control constant of the air fuel ratio of the feed back control is changed so that the second exhaust sensor detects in accordance with a condition of the catalyst.
    Type: Grant
    Filed: March 30, 1992
    Date of Patent: May 17, 1994
    Assignee: Mazda Motor Corporation
    Inventors: Kazunari Komatsu, Kiyoshi Kuronishi, Naoyuki Noguchi, Hirofumi Nishimura
  • Exhaust system for internal combustion engine
    Patent number: 5228287
    Abstract: An exhaust system for an automobile engine having two groups of cylinders has a catalytic device. Deterioration of the catalytic device is detected based on an oxygen level in exhaust gas passed through the catalytic device. A feedback control of an air-fuel ratio is conducted for the cylinder groups all together, based on either of the air-fuel ratios determined, based on emission levels of exhaust gas discharged, for one of two of the groups of cylinders, only when a specific vehicle driving condition is detected.
    Type: Grant
    Filed: June 29, 1992
    Date of Patent: July 20, 1993
    Assignee: Mazda Motor Corporation
    Inventors: Kiyoshi Kuronishi, Kazunari Komatsu, Naoyuki Noguchi, Hirofumi Nishimura