Resources Contact Us Home
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
Mask and method for forming the mask
Linear jet ionizer
Sub-resolution assist feature repair
Wireless device and communication control method
RF amplifier with digital filter for polar transmitter
Method and device for reducing image color noise
Systems and related methods of user-guided searching
  Randomly Featured Patents
Method and apparatus for the damping of motor vibrations
Electromagnetic measuring system for meteorology
Room temperature-curable organopolysiloxane composition
Pharmaceutical tablets having height greater than width
Fluid reservoir for penile implant devices
Drive unit for a wiper system of motor vehicles
Table lamp
Hydraulic circuit, particularly for camshaft adjusters, and corresponding control element
Vertical cavity surface emitting laser (VCSEL) array laser scanner
Reproduction apparatus, reproduction method, recording apparatus, recording method, AV data switching method, output apparatus, and input apparatus