Vehicle air-fuel controller having hot restart air/fuel ratio adjustment

摘要

An air/fuel ratio controller for an engine determines a hot restart condition by comparing the prior engine shutdown temperature with a predetermined constant and with the engine startup temperature. If the prior engine shutdown temperature exceeds the predetermined constant and the difference between the engine shutdown temperature and the engine startup temperature is within a predetermined value, a hot restart condition is indicated and the open loop air/fuel ratio otherwise determined in accord with engine operating parameters is adjusted to provide for improved hot restart engine performance.