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
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CKP input signal
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2
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Injection signal
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3
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Injector lift
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4
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Crank angle basic position
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5
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Fuel injection starts
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6
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Pilot injection period
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7
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Correction
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8
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Interval
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9
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Main injection timing
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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.