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

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•  Fuel injection start timing is determined based on the fuel injection amount and crank angle signals input from the crankshaft position sensor.
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1
CKP input signal
2
Injection signal
3
Injector lift
4
Crank angle basic position
5
Fuel injection starts
6
Pilot injection period
7
Correction
8
Interval
9
Main injection timing


Determination of Fuel Injection Timing

•  The PCM calculates the optimum fuel injection timing based on the predetermined target fuel injection timing and input signals from each sensor.

Target Fuel Injection Timing

•  Target fuel injection timing is calculated based on engine speed and fuel injection amount.

Injection Timing Correction

•  Actual fuel injection timing is corrected based on the input signals from each sensor such as intake air temperature, engine coolant temperature, and barometric pressure.