Fuel injection control

Main characteristics

There are two modes of operation of the fuel injection: "synchronous injection" and "asynchronous injection". Permission regulation with feedback signal and the barometric pressure sensor adjustable oxygen concentration.

Simultaneous injection

PCM unit determines the timing of fuel injection time and fuel quantity synchronized with the crank angle, on the basis of the following signals during intake and exhaust strokes each cylinder:

- The position of the crankshaft, mass air flow, coolant temperature, intake air temperature.

Asynchronous injection

PCM unit determines the timing of fuel injection time and fuel quantity on the basis of the following signals (without synchronization with the rotation angle of the crankshaft):

- Throttle position, mass air flow, temperature, coolant temperature, intake air temperature.

Correction for barometric pressure

Objective: To maintain the stability of the engine

Conditions: always.

Action: the lower the barometric pressure, a large correction.

Adjustment using feedback signal adjustable oxygen concentration sensor

Purpose: control of air / fuel ratio for maximum performance of the catalytic converter.

Conditions: zone feedback.

Action: the output voltage of the back gauge of oxygen concentration.