Resources Contact Us Home
Air-fuel ratio feedback control method for internal combustion engines

Image Number 7 for United States Patent #4993393.

A method of controlling air-fuel ratio of a mixture supplied to an internal combustion engine in a feedback manner responsive to an output signal from an exhaust gas concentration sensor. The air-fuel ratio of the mixture is controlled to a desired value by means of proportional control and integral control. The proportional control is inhibited, when the value of the output signal has changed from a lean side to a rich side with respect to a predetermined reference value while the engine is operating in one of a predetermined high load condition and a predetermined high rotational speed condition.

  Recently Added Patents
Liposomal nanoparticles and other formulations of fenretinide for use in therapy and drug delivery
Layout design defect repair based on inverse lithography and traditional optical proximity correction
Debris tray
Moulded tie strips
Philanthropy management apparatus, system, and methods of use and doing business
Paper product with surface pattern
Light transformation particle and photobioreactor
  Randomly Featured Patents
Gaming machine displaying special symbol having randomly selected functions
Food product and method of preparation
Door handle
Photoresist having increased sensitivity and use thereof
Ski/pole carrier apparatus
Selection of real time collaboration tools
Method and apparatus for establishing a call connection based on a communication system condition desired by a calling party
Automatic soundtrack generator in an image record/playback device
Enzymatic detergent additive
Methods and compositions for sucker control in tobacco comprising fatty acids and flumetralin or maleic hydrazide