Browse Publications Technical Papers 2006-01-1052
2006-04-03

Port-Fuel-Injection Gasoline Engine Cold Start Fuel Calibration 2006-01-1052

This paper presents a simulation model for the cold start fuel calibration (CSFC) in port-fuel-injection gasoline engines. The model is based on data that are readily available during the regular engine tests. The model has been applied to two production multipoint-port-fuel-injection spark ignition gasoline engines. The model determines the amount of fuel vaporized in the intake port at any crank angle degree, and in the cylinder on cycle-by-cycle basis, during the cold start process. The optimal CSFC can be developed from the simulation results, potentially reduce the development time and cost of testing. The model works with any combinations of fuel compoments, and at various cold start soaking temperatures. The excellent flexibility makes this model an efficient tool for CSFC.

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