Contents: Main characteristics ⇓ Synchronous injection ⇓ Asynchronous injection ⇓ Barometric pressure correction ⇓ Control using feedback from the rear…⇓
Main characteristics
There are two modes of operation of the fuel injection system: "synchronous injection" and "asynchronous injection". Regulation using feedback from barometric pressure and the signal from the rear oxygen concentration sensor has been introduced.
Synchronous injection
The PCM determines the injection timing and fuel quantity, synchronized with the crankshaft rotation angle, based on the following signals during the intake and exhaust strokes of each cylinder:
- crankshaft position, air mass flow, coolant temperature, intake air temperature.
Asynchronous injection
The PCM determines the selection of injection timing and fuel quantity based on the following signals (without synchronization with the crankshaft rotation angle):
- throttle position, mass air flow, temperature, coolant temperature, intake air temperature.
Barometric pressure correction
Objective: to maintain engine stability
Working conditions: always.
Action: lower barometric pressure, greater correction.
Control using feedback from the rear oxygen concentration sensor
Purpose: To control the air/fuel ratio to ensure maximum catalytic converter performance.
Conditions: in the feedback zone.
Action: Output voltage of the rear oxygen concentration sensor.