With the improvement of the performance of diesel generators, the composition of related oil circuit systems has become more and more sophisticated. However, machinery will inevitably fail, and the highest failure rate is also the low-pressure circuit part of the oil supply system. In the fuel supply system, the low-pressure circuit components are mainly composed of an electric fuel pump, a fuel filter, a fuel filter, and a fuel tank. The parts where the low-pressure circuit is often blocked are the fuel pipe, filter, diesel filter, fuel tank cap vent, etc. However, in actual work, since the entire circuit may be clogged, it is necessary to prevent the clogging of the circuit in an all-around way.
In the diesel generator fuel supply system, the low-pressure oil circuit components are mainly composed of an electric fuel transfer pump, a fuel pre-filter, a fuel filter, and a fuel tank.
(1) The electric fuel pump is an eccentric rotor variable capacity roller fuel pump, driven by a permanent magnet DC motor, and its function is to deliver fuel to the high-pressure fuel pump, which is installed in the contact part on the left side of the frame. (2) The fuel pre-filter is similar to the ordinary gasoline paper filter and is a disposable component. (3) The fuel filter includes housing support and a filter element. A fuel temperature sensor, fuel filter, bypass valve, fuel preheater, etc. are provided on the housing support. The parameters are transmitted to the ECU for the ECU to properly correct the fuel injection volume. When the oil delivery pressure is lower than 60kPa, the blockage signal of the control bypass valve is opened to ensure a normal oil supply. The fuel preheater heats the fuel preheater to a suitable temperature when the fuel temperature is lower than 5°C. (4) The fuel tank of the fuel tank and the mechanical fuel injection pipe, fuel pipe, liquid level sensor, fuel return pipe, etc.
