A totally integrated electronic control system for the engine and transmission

A system is described which implements efficient co-ordination of the engine and transmission control subsystems using an electronically controlled throttle valve. To minimize the air-fuel ratio fluctuation, a new fuel injection system with variable injection pattern control in accordance with engine operating conditions is adopted. The fuel is injected directly into the cylinders during the intake stroke without enriched compensation. A method for accurately detecting the mass of fresh air inducted by the cylinder to control the air-fuel ratio precisely during the throttle control is also adopted, using an intake manifold sensor and mass air flow sensor with compensation according to changes in the mass of reverse flow gas from the cylinder