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.
![](https://motoinstruction.ru/img/suzuki/14/120249.jpg)
Compensation of injection time (volume)
The following different signals are output from the respective sensors for compensation of the fuel injection time (volume).
SIGNAL | DESCRIPTION |
ENGINE COOLANT TEMPERATURE SENSOR SIGNAL | When engine coolant temperature is low, injection time (volume) is increased. |
INTAKE AIR TEMPERATURE SENSOR SIGNAL | When intake air temperature is low, injection time (volume) is increased. |
BATTERY VOLTAGE SIGNAL | ECM 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. |
ENGINE RPM SIGNAL | At high speed, the injection time (volume) is increased. |
ACCELERATION SIGNAL/ DECELERATION SIGNAL | 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. |
Injection stop control
SIGNAL | DESCRIPTION |
TIP OVER SENSOR SIGNAL (FUEL SHUT-OFF) | When the motorcycle tips over, the tip over sensor sends a signal to the ECM. Then, this signal cuts OFF current supplied to the fuel pump, fuel injector and ignition coil. |
OVER-REV. LIMITER SIGNAL | The fuel injectors stop operation when engine rpm reaches rev. limit rpm. |