Fuel Injection Timing Control

FUEL INJECTION TIMING CONTROL

The timing for the start of fuel injection from the variable fuel feed rate injection pump is interconnected with the control of the pre-stroke.
If the fuel feed rate is made high, the pre-stroke will become larger, so this well result in retarding the timing for the start of fuel injection; if the fuel feed rate is made low, the pre-stroke will become smaller, so this will result in advancing the timing for the start of fuel injection.

Under actual operating conditions, the fuel feed rate is set high when the engine is rotating at low speed, such as during warming-up operations, and is set low when the engine is rotating at high speed. Therefore, the timing for the start of fuel injection is also delayed when the engine speed is low and is advanced when the engine speed is high, which is more or less the same action as with the present timer. In addition, when the weather is cold, to prevent white smoke, control is carried out by the control unit in accordance with the operating condition of the engine to give the optimum fuel feed rate and timing for the start of injection.