#
FUEL INJECTION TIMING CONTROL OPERATION [MZR-CD (RF Turbo)]

BME014000000T31
• The fuel injection timing is controlled in accordance with the position of the injection pulse.
• The fuel injection start timing is determined by the crank angle standard position signal and fuel injection amount.
Fuel injection start timing

  105°CA - (main fuel injection timing + interval + response delay correction + pilot fuel injection time)

1 | CKP sensor signal
2 | Injector operation
3 | Injector lift
4 | Crank angle standard position
5 | TDC
6 | 105°CA
7 | Fuel injection start timing
8 | Pilot fuel injection time
9 | Response delay correction
10 | Interval
11 | Main fuel injection timing

## Injection Timing Calculation

• Based on the basic target injection timing and according to the signals from each sensor, the PCM calculates the optimal injection timing for the driving condition.

### Target injection timing

  • The target injection timing is calculated based on the engine speed and the fuel injection amount.

### Injection timing correction

  • The injection timing is corrected based on the intake air pressure, the engine coolant temperature, and the atmospheric pressure.