Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Method and arrangement for controlling the quantity of fuel for an internal combustion engine having a catalytic converter










Image Number 5 for United States Patent #5293740.

The invention is directed to a method for controlling the fuel quantity for an internal combustion engine having a catalytic converter and includes the steps of: determining the air mass flow inducted by the engine; determining a precontrol variable for the quantity of fuel in dependence on current values of operating variables of the engine; presetting a desired lambda value for the air/fuel mixture to be supplied to the engine; checking the actual lambda value of the exhaust gas forward of the catalytic converter; comparing the desired lambda value to the actual lambda value to form a comparison; controlling the fuel quantity in dependence upon the comparison; determining the oxygen actual charge level of the catalytic converter; comparing the determined actual charge level to a desired charge level; and, then, when the actual charge level is greater than the desired charge level, lowering the desired lambda value to below the value one; otherwise, when the actual charge level is less than the desired charge level, increasing the desired lambda value above the value one. This method leads to the condition that very low toxic exhaust gas is produced even for transient operations since the catalytic converter almost always has sufficient storage capacity for further oxygen which occurs temporarily or adequate oxygen for combusting fuel which occurs temporarily. The invention is also directed to an arrangement for carrying out the method.








 
 
  Recently Added Patents
Method and apparatus for analysis of histopathology images and its application to cancer diagnosis and grading
Method and apparatus for controllable communication
Toy
Adaptive input interface
Data modulation for groups of memory cells
Method for computer-based determination of a position in a map, navigation device and mobile radio telephone
Carbon dioxide capture system and methods of capturing carbon dioxide
  Randomly Featured Patents
Subperiosteal bone anchor
Polymeric decontamination composition
Cosmetic composition
Stabilizing strut for insertion between motorcycle wheel and fender
Device and method for forming a nip in an image forming apparatus
Method for performing simulation of a semiconductor integrated circuit using a relative variation model
Secure session tracking method and system for client-server environment
Storage module
Combined ceiling fan and light
Ball striking device