ENGINE AND EMISSION CONTROL SYSTEM DESCRIPTION — Fuel Injection Control INPUT/OUTPUT SIGNAL LINE

The amount of fuel injected from the fuel injector, or the length of time the valve remains open, is determined by the E.C.U. The basic amount of fuel injected is a program value mapped in the E.C.U. ROM memory. In other words, the program value is preset by engine operating conditions determined by input signals (for engine rpm and air intake) from both the crank angle sensor and the air flow meter.

In addition, the amount of fuel injection is compensated for to improve engine performance under various operating conditions as listed below:

<Fuel increase> 1) During warm-up 2) When starting the engine 3) During acceleration 4) Hot-engine operation <Fuel decrease> 1) During deceleration