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
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105°CA - (main fuel injection timing + interval + response delay correction + pilot fuel injection time)
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1
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CKP sensor signal
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2
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Injector operation
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3
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Injector lift
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4
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Crank angle standard position
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5
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TDC
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6
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105°CA
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7
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Fuel injection start timing
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8
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Pilot fuel injection time
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9
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Response delay correction
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10
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Interval
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11
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Main fuel injection timing
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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
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• The target injection timing is calculated based on the engine speed and the fuel injection amount.
Injection timing correction
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• The injection timing is corrected based on the intake air pressure, the engine coolant temperature, and the atmospheric pressure.