Main characteristics
There are two modes of operation of the fuel injection system: «synchronous injection» And «asynchronous injection». Introduced control using feedback on barometric pressure and the signal of the rear oxygen concentration sensor.
Synchronous injection
The PCM determines the injection timing and amount of fuel synchronized with the crank angle based on the following signals during the intake and exhaust strokes of each cylinder:
- crankshaft position, mass air flow, coolant temperature, intake air temperature.
Asynchronous injection
The PCM determines the timing of the injection and the amount of fuel based on the following signals (without synchronization with crankshaft angle):
- throttle position, mass air flow, temperature, coolant temperature, intake air temperature.
Barometric pressure correction
Purpose: to maintain the stability of the engine.
Working conditions: always.
Action: lower barometric pressure, greater correction.
Rear Oxygen Sensor Feedback Control
Purpose: To control the air/fuel ratio to ensure maximum catalytic converter performance.
Conditions: in the feedback zone.
Action: Rear oxygen sensor output voltage.