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4-10 FI SYSTEM DIAGNOSIS
FI SYSTEM TECHNICAL FEATURES
INJECTION TIME (INJECTION VOLUME)
The factors to determine the injection time include the basic fuel injection time, which is calculated on the
basis of intake air pressure, engine speed and throttle opening angle, and various compensations.
These compensations are determined according to the signals from various sensors that detect the engine
and driving conditions.
Intake Air Pressure
Sensor (IAP Sensor)
Intake air pressure
signal
Engine speed
signal
Throttle opening
signal
Crankshaft Position
Sensor (CKP Sensor)
Throttle Position
Sensor (TP Sensor)
Various
Sensors
Various signals
Injection signal
Injectors
ECM
Basic
fuel
injection
time
Ultimate
fuel
injection
time
Compensation