Patents by Inventor Toru Noma

Toru Noma 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).

  • Secondary air supply control apparatus for internal combustion engine
    Patent number: 7131266
    Abstract: When a specified air-fuel ratio F/B control condition is established during supply of a secondary air provided, an air-fuel ratio F/B control is executed, and at this time, an initial value of a target air-fuel ratio is set to a before-catalyst air-fuel ratio detected by an A/F (air-fuel ratio) sensor. The target air-fuel ratio subsequent to this is gradually changed from the initial value to a specified air-fuel ratio. By this, the initial value of the target air-fuel ratio can be suitably set at a start time of execution of the air-fuel ratio F/B control during the supply of the secondary air. The target air-fuel ratio subsequent to this is gradually changed to a stoichiometric air-fuel ratio, so that a change in engine rotation speed is suppressed and the drivability can be improved.
    Type: Grant
    Filed: March 4, 2004
    Date of Patent: November 7, 2006
    Assignee: Denso Corporation
    Inventors: Masayuki Kita, Toru Noma, Kenichi Fujiki, Tomoyuki Takagawa
  • Secondary air supply control apparatus for internal combustion engine
    Publication number: 20040172934
    Abstract: When a specified air-fuel ratio F/B control condition is established during supply of a secondary air provided, an air-fuel ratio F/B control is executed, and at this time, an initial value of a target air-fuel ratio is set to a before-catalyst air-fuel ratio detected by an A/F (air-fuel ratio) sensor. The target air-fuel ratio subsequent to this is gradually changed from the initial value to a specified air-fuel ratio. By this, the initial value of the target air-fuel ratio can be suitably set at a start time of execution of the air-fuel ratio F/B control during the supply of the secondary air. The target air-fuel ratio subsequent to this is gradually changed to a stoichiometric air-fuel ratio, so that a change in engine rotation speed is suppressed and the drivability can be improved.
    Type: Application
    Filed: March 4, 2004
    Publication date: September 9, 2004
    Applicant: Denso Corporation
    Inventors: Masayuki Kita, Toru Noma, Kenichi Fujiki, Tomoyuki Takagawa