FUEL INJECTION TIMING CONTROL [SKYACTIV-D 2.2]
id0140z7988000
Outline
• The PCM determines and controls the optimum fuel injection timing according to engine operation conditions based on the signals from each input sensor.
Block diagram
Fuel injector (2pin type)
Fuel injector (6pin type)
Operation
• Fuel injection start timing is determined based on the fuel injection amount and crank angle signals input from the crankshaft position sensor.
Fuel injector (2pin type)
-
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 the engine speed and the fuel injection amount.
-
Injection Timing Correction
-
• The actual fuel injection timing is corrected based on the input signals from each sensor such as the IAT, ECT, and BARO sensors.
Fuel injector (6pin type)
-
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
-
• The basic target fuel injection timing is calculated based on the engine speed and fuel injection amount.
-
Injection Timing Correction
-
• The target fuel injection timing is corrected based on the input signal from each sensor, such as the intake air temperature, engine coolant temperature, or barometric pressure.
