Three Major Diesel Injection Systems Introduction

◉ 1. Mechanical Injection System
Mechanical injection systems are primarily controlled by an injection pump, controlling the injection quantity. The driver adjusts the throttle lever position of the injection pump by manipulating the accelerator pedal or governor, thereby controlling the injection quantity.

◉ 2. Electronic Position Injection System
Electrically controlled position injection systems are an upgrade from mechanical systems, introducing automatic control devices such as stepper motors or proportional solenoid valves to automate fuel injection timing and speed control characteristics. Based on the structural characteristics of the injection pump, this system can be further divided into two types: VE-type electronically controlled distributor pumps and in-line electronically controlled pumps (TICS).

◉3. Electronically Controlled Time-Based Injection System
Electrically controlled time-based injection systems further increase injection pressure to a high level of 80–220 MPa and employ a new time-based control method. Its control of injection quantity and injection timing is more precise. Based on the injector structure, it can be divided into three types: unit pump, pump-nozzle, and high-pressure common rail.