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
Determination method for a reinitialization of a temporal sequence of fluoroscopic images of an examination region of an examination object
Method and system for fail-safe call survival
Computer implemented apparatus for generating and filtering creative proposal
5-phenyl-pentanoic acid derivatives as matrix metalloproteinase inhibitors for the treatment of asthma and other diseases
Protecting information written to recording medium
Bicycle shifting method
Integrated wire carrier for electrode array
  Randomly Featured Patents
Method and apparatus for detecting position/variance of input light using linear and quadratic outputs
Papilloma virus-like particles, fusion proteins as well as processes for their production
Thermal barrier coatings with high fracture toughness underlayer for improved impact resistance
Motor driven wood working tool with vacuum feature
Apparatus and method for controlling a thyristor converter in response to change in mode of load current
Pyridine derivatives, a process for their preparation and a pharmaceutical composition containing the same
Device and implantation system for electrical stimulation of biological systems
Carrying case for communications headset system
Display apparatus
Multilayer electronic devices for imbedded capacitor