Ignition Timing Multi-object Optimization of Alternative Fuel Engine Virtual ECU.

Multi-objective optimization method of ignition timing on gasoline engine using alternative fuels, CNG and Petrol was studied. And a kind of method named MOAGA was made for optimization. Ignition timing multi-object optimization model was built and the parameters of object function such as torque, exhaust gases are uniformed. Base on the data from ECU hardware in-loop system and real exhaust experiment, the MOGAA was used to search the key to the object function. The results show it comprehensive performance is relative better in the T of 0.7 for the ignition timing. And four stable situations test results that the NOx improve maximum to 27.32%, HC improve maximum to 22.31% and CO improve 0.01% while the torque loss is lees than 5%. [ABSTRACT FROM AUTHOR]