Things about Fuel Shut off Solenoid

The fuel shut off solenoid is a special component that cuts off the fuel supply to the engine, causing the engine to shut down, and it is electromagnetic. Solenoids like this can be found in mechanical equipment, such as excavators, forklifts, etc. At the same time, there are also many brands of fuel shut off solenoid, like kubota fuel shut off solenoid, which is universal in construction engineering field.

What controls the fuel shut-off solenoid?

Firstly, you will find the fuel shut off solenoid near the fuel injection pump. If you track the fuel line of some other vehicle, you can find it in front of the pump. Since the solenoid has no power source, it is controlled by a generator panel.

How does the fuel shut-off solenoid pull-in coil relay work?

The pull-in coil of the fuel shut off solenoid on the engine is connected to the relay, which in turn is connected to the engine starting circuit. Relays are connected by an oil pressure lamp switch, which turns on after a short time as a result of the oil pressure change when the engine starts. As the oil pressure rises, the current of the relay pull-in coil is cut off to avoid overheating of the solenoid valve.

Mechanics of diesel fuel shut off solenoids

The mechanical force in a diesel fuel shut off solenoid is the solenoid coil, which converts electrical energy into magnetic energy that is used to adjust the valve. The diesel shut off solenoid contains an intake line that delivers diesel from the fuel line to the solenoid. This valve consists of a rubber or plastic plug that fits over the inlet pipe to keep it closed. The front end of the plug contains a rubber o-ring that seals off the intake tube and prevents diesel from entering the solenoid. The plug is held in place by a metal spring at the rear end of the plug. Unlike the conventional solenoid valve, diesel fuel shut off solenoids are connected to sensors capable of receiving and interpreting electronic signals from the machine's main electrical system. If the sensors detect a dangerous problem with the operation of the machine or the engine, an electrical signal running to the solenoid will automatically shut off. When the solenoid coil fails, the force of the spring pushes the plug back onto the intake tube, sealing the tube and cutting off diesel flow to the engine. It is very important for a diesel shut off solenoid to have a pressure differential between the outlet and inlet pipes as there is no mechanical means to force diesel through the valve.