Patents by Inventor Yukuo Matsunaga

Yukuo Matsunaga 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 system for internal combustion engine
    Patent number: 4621493
    Abstract: Admission of secondary air is effected to remove a portion of exhaust gases staying in components of a secondary air supply system, particularly, a one-way valve with a pair of lead valves. The scavenging with the secondary air is carried out when the fuel supply to the engine is suspended under a predetermined deceleration condition. When the predetermined deceleration condition is satisfied, a secondary air shut off valve is opened even when a coolant temperature of the engine is so high that the secondary air is not required by a catalyst in the exhaust system.
    Type: Grant
    Filed: August 14, 1984
    Date of Patent: November 11, 1986
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Yukuo Matsunaga, Hajime Kawasaki