What is the role of the solenoid valve on the injector of an EFI diesel engine?

Solenoid valve is an industrial equipment controlled by electromagnetic. It is an automation basic component used to control fluid. It belongs to actuator and used in industrial control systems to adjust the direction, flow, speed and so on. The solenoid valve can cooperate with different circuits to achieve the desired control.

There are many kinds of solenoid valves. Different solenoid valves play a role in different positions of the control system.

Working principle

There is a closed cavity in the solenoid valve with through holes at different positions.

Each hole is connected to a different oil pipe and the middle of the cavity is a piston.

There are two electromagnets on both sides. Which side of the magnet coil will be

attracted to the valve body when it is energized. On the other hand, by controlling the

movement of the valve body to open or close the different oil discharge holes, and the

oil inlet is normally open, the hydraulic oil will enter the different oil discharge

pipes, and then the piston of the cylinder is pushed by the oil pressure. Drive the

piston rod, and the piston rod drives the mechanical device. In this way, the mechanical

movement is controlled by controlling the current on and off of the electromagnet. In

principle, it is divided into three categories: direct-acting solenoid valves, step-by-

step direct-acting solenoid valves, and pilot solenoid valves.