Differences between mechanical speed regulation, electronic speed regulation, and ECU of diesel generator sets

Differences between mechanical speed regulation, electronic speed regulation, and ECU (electronic fuel injection) of diesel generator sets

In terms of speed regulation, both electronic injection and electronic control belong to the category of electronic speed regulation, which is different from mechanical speed regulation control. However, there are essential differences in terms of fuel injection control and speed control execution. The electronic control machine is a traditional high-pressure pump that directly injects diesel into the cylinder. In terms of fuel saving, the fuel of the electronic injection machine is fully burned, so it is the most fuel-efficient. Electronic injection is a relatively advanced technology. In a closed environment composed of a high-pressure oil pump, a pressure sensor, and a computer control unit (ECU), a fuel supply method that completely separates the generation of injection pressure and the injection process. The computer control unit ECU will determine the appropriate injection pressure and injection time based on signals such as load speed, thereby controlling the opening of the injector. The throttle of mechanical speed regulation is fixed, so the general fuel consumption is relatively high.

a. Mechanical speed regulation:

The throttle size of mechanical speed regulation is fixed, so the speed of the mechanical speed regulation unit will be higher than the rated speed when it is idling.

The mechanical speed regulation unit often needs to be used with a shutdown electromagnet.

b. Electronic speed control:

The throttle size of the electronic speed control unit will change according to the load change.

The actuator, speed control board and speed sensor work together to keep the speed at the rated speed under different load conditions.

c. ECU (electronic fuel injection):

The computer (ECU) accurately controls the fuel supply or injection process.

Electronic fuel injection engines are more fuel-efficient, burn more fully, and have higher emission levels.