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
Relative vehicular positioning using vehicular communications
Plants having enhanced yield-related traits and a method for making the same
Image measuring apparatus
Non-volatile memory device and method for fabricating the same
Investment fund for maximizing a risk adjusted expected return while providing a defined minimum income at maturity
Methods for data acquisition systems in real time applications
Universal sign post base
  Randomly Featured Patents
Thin film transistor having a buffering pad layer for a liquid crystal display and a method for manufacturing the same
Rectally absorbable form of L-dopa
3-Heterothio[(oxyalkyl)thioacetyl]cephalosporin derivatives
Process for the production of polyhydroxy lignin-cellulose silicate polymer
Method of handoff within a telecommunications system containing digital base stations with different spectral capabilities
High speed, high density interconnect system for differential and single-ended transmission systems
Cylindrical receptacle of fiber-reinforced plastic and method of manufacturing a receptacle
Method and system for business to business data interchange using XML
Precompute logic for software packet processing
Process for the preparation of diglycerol and/or polyglycerol