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
Method for distributing advertisements to client devices using an obscured ad monitoring function
Battery module
System and method for conditionally sending a request for data to a home node
Quinoid thiophene organic photoelectric material, preparation method thereof and application thereof
Intake parameter-calculating device for internal combustion engine and method of calculating intake parameter
Method of preparing enteric hard capsule and enteric hard capsule prepared thereby
Monitoring of undesirable fluid ingress into subsea control modules
  Randomly Featured Patents
Methods and systems for in-situ machinery inspection
Web server and web service method thereof
Power diode and hybrid diode, voltage limiter and freewheeling diode having the power diode
Electronic flash apparatus for reducing the incidence of human eyelid closures during exposure
Method of applying ornamental element with a shaft of melt adhesive
Gate stabilizer
Independent direct link protocol
Low power compact heater for piezoelectric device
Prescription paper for physicians
Photographic copy method and materials