Traditional mechanical fuel injection system as shown in Figure 1. These mainly include: fuel tanks, low-voltage, oil pump, fuel filter, high pressure fuel pump, fuel injector and tubing, and so on. The process is: the engine crankshaft gear driven fuel pump through the camshaft rotation, the fuel from the fuel tank to the pump, a low pressure, another fuel filter, part of the supply of high pressure fuel pump, to return to another part of the fuel tank. Access to the fuel injection pump, through high-pressure pipeline to transport fuel injector, when the pressure over the opening pressure injector, the injector opening, a fuel injection.
Diesel fuel pump depends on the control of the engine. Mainly reflected in: Engine provided the impetus to the fuel pump, engine rotation every 2 laps of the Work 1 cylinder, fuel pump rotating a circle, each cylinder fuel injection to 1. This view, the overall fuel pump fuel injection engines from time to indirect control, and engine oil pressure with larger changes in engine speed. Injection is the advance in the engine to higher fuel pump when the corresponding advance of the camshaft angle, to meet the requirements of the engine at high speed. Governor through the induction of various engine components perception condition, the diesel engine control, mainly to meet the stability and idling over the demarcation of speed off oil, the remaining conditions to rely on components and sensors within the governor The spring balance to stabilize the engine speed. Such a mechanical fuel pump in the form of main-line fuel pump and distribution of VE-pump.