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

Image Number 10 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
Distortion compensation device, distortion compensation method, and radio transmitter
Associating objects in databases by rate-based tagging
Stable nanoemulsions for ultrasound-mediated drug delivery and imaging
Elastic wave device having a capacitive electrode on the piezoelectric substrate
System for encrypting and decrypting a plaintext message with authentication
System for setting programmable parameters for an implantable hypertension treatment device
Photographic printing paper and method of making same
  Randomly Featured Patents
Method for optical chassis measurement
Digital gamma ray imaging device
Semiconductor memory controlling device
Carousel proxy
Tobacco compositions, method and device for releasing essentially pure nicotine
Method of controlling access for software development via a virtual common desktop with plural viewers
Eighteen cell hinged-cover carbon thermoformed from plastic sheet
Compact universal unit for tow bar
Radial type reciprocating compressor and portable tool powering system with flexing connecting rod arrangement
Digital sound processing system for a vehicle