Method for estimating the fuel-to-air ratio in an internal combustion engine of a motor vehicle

摘要

The method involves calculating a simple model of richness (Phi-Calc) using flow value of fuel injected (qinj) in a cylinder, measuring intake air flow (Qair) and storing quantized wealth drifts operating points. Correction is applied to a simple model of richness from a drift wealth stored in the mapping. A quantified drift is stored in operating points when the engine is in transition state. A value of drift memorized in the mapping is retimed, where the drift value memorized in the mapping is carried out by application of a Kalman filter in a point of operation in the transitory mode.