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
Silicas and alkali metal salt compositions, detergents formed from such compositions and method of forming such compositions and detergents
Methods and apparatus to identify exposure to 3D media presentations
Self-service channel marketplace
Playlist search device, playlist search method and program
Methods and systems for adapting a user environment
System and method for operating an electric power converter
Zoom lens
  Randomly Featured Patents
Device for subtracting or adding charge in a charge-coupled device
Apparatus and method for recording image analysis information
Golf ball
Snap clamp
Four-quadrant multiplier for operation of MOSFET devices in saturation region
Lateral raise exercise machine
Method of forming articles
Eyeglass holder
Fox glove light pendant
Vehicle occupant protection apparatus with pocket and method of making same