Patents by Inventor Makio Waku

Makio Waku 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).

  • Cross-flow type internal combustion engine with a small sized exhaust gas recirculating system
    Patent number: 4221203
    Abstract: A cylinder head of a cross-flow type internal combustion engine is formed with a through hole or a groove which is associated with an exhaust gas recirculating system to simplify the exhaust gas recirculating system and simultaneously to make it small.
    Type: Grant
    Filed: June 16, 1978
    Date of Patent: September 9, 1980
    Assignee: Nissan Motor Company, Limited
    Inventors: Yoshimasa Hayashi, Akihiro Ohnishi, Makio Waku, Hideo Kamino
  • Method and system for controlling ignition spark timing of an internal combustion engine of the multiple plugs type
    Patent number: 4180031
    Abstract: A method and system for controlling ignition spark timing of an internal combustion engine of the multiple plugs type, in which a plurality of spark plugs are energized at different timings with a predetermined phase in dependence on the flow of air-fuel mixture in a combustion chamber, whereby air-fuel mixture is ignited at timings optimum for rapid combustion.
    Type: Grant
    Filed: May 13, 1976
    Date of Patent: December 25, 1979
    Assignee: Nissan Motor Company, Limited
    Inventors: Shigeo Muranaka, Kokichi Ochiai, Makio Waku
  • Ignition distributor having independent ignition system breaker arm contacts simultaneously engaging common conductive post
    Patent number: 4121064
    Abstract: Two sets of breaker contacts respectively associated with independent ignition systems have two breaker arms with identical configuration, arranged coaxially one above the other to engage a cam at an identical angular position thereof whereby the contacts open and close synchronously.
    Type: Grant
    Filed: March 10, 1977
    Date of Patent: October 17, 1978
    Assignee: Nissan Motor Company, Limited
    Inventors: Yasuo Nakajima, Yoshimasa Hayashi, Makio Waku
  • Closed loop mixture control system using a two-barrel carburetor
    Patent number: 4108121
    Abstract: A closed loop mixture control system for an internal combustion engine includes a two-barrel carburetor having a primary throttle and a secondary throttle which is adapted to be automatically brought into action when the primary venturi depression reaches a predetermined value. An exhaust composition sensor is provided to control the air-fuel ratio through the primary barrel so that the conversion efficiency of a catalytic convertor is at a maximum during the time prior to the operation of the secondary throttle.
    Type: Grant
    Filed: March 9, 1976
    Date of Patent: August 22, 1978
    Inventors: Hidehiro Minami, Makio Waku
  • Two barrel carburetor
    Patent number: 4065920
    Abstract: A two barrel carburetor is disposed in an intake system of an internal combustion engine having a catalytic converter in the exhaust system thereof. One of the barrels is a conventional carburetor barrel, while the other one of the barrels is provided with a fuel nozzle through which fuel is fed into the barrel, the amount of which being controlled by a fuel controller electronically receiving information signals from an exhaust gas composition sensor disposed in the exhaust system at a position upstream of the catalytic converter.
    Type: Grant
    Filed: March 2, 1976
    Date of Patent: January 3, 1978
    Inventors: Hidehiro Minami, Makio Waku