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
Methods, systems, and physical computer storage media for processing a plurality of input/output request jobs
Pattern data conversion for lithography system
Support for a portable electronic device
Redistribution layer (RDL) with variable offset bumps
Mechanical and moisture protection apparatus for electronic devices
Coordinated multi-point transmission in a cellular network
Solar energy converter with improved photovoltaic efficiency, frequency conversion and thermal management permitting super highly concentrated collection
  Randomly Featured Patents
Method of quickly evaluating contact resistance of semiconductor device
Method for analyzing polynucleotides
System for locating faults and estimating fault resistance in distribution networks with tapped loads
Method of shot blasting and a machine for implementing such a method
Method for calculating PMV of air conditioning system
Sea-based hydrogen-oxygen generation system
Lawn and garden irrigation controller
Apparatus and method for drawing character sequence using font data with any data structure
Exchange jig, bed device, and X-ray computed tomography apparatus
Method and a device for use in coiled tubing operations