HYOSUNG Aquila GT250 Ej, Service Manual

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4-1-7 EI SYSTEM DIAGNOSIS
COMPENSATION OF INJECTION TIME (VOLUME)
The following different signals are output from the respective sensors for compensation of the fuel injection time
(volume).
INJECTION STOP CONTROL
SIGNAL DESCRIPTION
ENGINE TEMPERATURE
SENSOR SIGNAL
INTAKE AIR TEMPERATURE SENSOR
SIGNAL
BATTERY VOLTAGE SIGNAL
ENGINE RPM SIGNAL
STARTING SIGNAL
ACCELERATION SIGNAL /
DECELERATION SIGNAL
When engine temperature is low, injection time (volume) is
increased.
When intake air temperature is low, injection time (volume) is
increased.
ECU operates on the battery voltage and at the same time, it
monitors the voltage signal for compensation of the fuel injection
time (volume). A longer injection time is needed to adjust
injection volume in the case of low voltage.
At high speed, the injection time (volume) is increased.
When starting engine, additional fuel is injected during cranking
engine.
During acceleration, the fuel injection time (volume) is increased
in accordance with the throttle opening speed and engine rpm.
During deceleration, the fuel injection time (volume) is
decreased.
SIGNAL DESCRIPTION
ROLL OVER SWITCH SIGNAL
(FUEL CUT-OFF)
OVER-REV. LIMITER SIGNAL
When the motorcycle rolls over, the roll over switch sends a
signal to the ECU. Then, this signal cuts OFF current supplied to
the fuel pump, fuel injector and ignition coil.
The fuel injectors stop operation when engine rpm reaches rev.
limit rpm.