Introduction to Diesel Fuel Shut Off Solenoid

What Is The Fuel Shut Off Solenoid Used For

A diesel fuel shut off solenoid is a solenoid valve used to remotely shut off the fuel supply to the engine.

A solenoid typically consists of a valve body and an integral solenoid assembly mounted on the valve stem. When the solenoid is energized, the movement of the plunger retracts the spring-loaded valve poppet from its seat, allowing fuel to pass through the valve. When the solenoid is deactivated, the valve spring pulls the poppet back to its seat, effectively shutting off fuel flow. The shutdown solenoid can be activated manually or as part of an automatic engine management system.

Solenoid valves are one of the most common remote fluid flow devices used in a variety of applications. A diesel fuel shut off solenoid is one such device used to remotely and sometimes automatically cut off the fuel supply to an engine or burner. These valves are generally integral units consisting of two separate units.

What Happens When a Fuel Solenoid Fails?

If the solenoid valve of the automobile's oil pump is damaged, the automobile's oil circuit system will fail, and the throttle control will become more difficult. Problems such as jumping or stopping to refuel can occur while the car is on the accelerator.

The oil pump solenoid valve has a sealed chamber with holes in different positions, each hole is connected to a different oil pipe. There is a piston in the center of the chamber and electromagnets on both sides that control the movement of the valve body to open and close the oil drain hole. Generally speaking, the oil inlet hole is always open, so the hydraulic oil enters various oil discharge pipes, and the engine runs normally. If the oil pump solenoid valve is damaged, the oil will not be supplied normally, affecting the car's power output when refueling, affecting the normal operation of the engine, and causing symptoms such as weak acceleration, no refueling, and idling. The vibration occurs, and engine noise.

An automobile's oil circuit system is an important part of an automobile, equivalent to the blood vessels of the human body. Therefore, when the car runs about 20,000 kilometers, it is necessary to check the car's oil circuit system to avoid car failure due to blockage. When adding fuel, it is recommended to add a high-quality fuel that is not easy to precipitate, so that it is not easy to produce carbon deposits and block the car pipeline system.

What Are The Common Problems For Solenoids?

1. If there are sporadic leaks of air pressure at the air source interface, the air source hose or joints should be replaced. For stainless steel rigid tubes, the joints should be properly tightened.
2. If the air source pressure is insufficient, pull the gland of the air filter element pressure-reducing valve and turn the shaft to increase the air source pressure.
3. If the solenoid valve does not work, check the power interface or replace the damaged solenoid valve.
4. If the valve stem gland leaks medium, the under the gland must properly lock the two nuts diagonally until there is no more leakage.
5. If air leaks from the cylinder of the piston shut-off valve, the seal ring and O-ring of the cylinder piston should be replaced, and the piston should be lubricated regularly.