What Happens When A Fuel Solenoid Fails?

What is a stop solenoid?

The vehicle's diesel engine stop solenoid controls the input of automobile fuel. Fuel can enter the engine normally when the solenoid valve is open, which only works when the vehicle is powered on. When the vehicle engine stops, the stop solenoid valve will also stop working, closing the fuel passage. There is a coil in the solenoid valve which is the same as that of a generator. When the power is turned on, a magnetic force is generated to pull the flameout switch back to the oil supply.

Where is the stop solenoid?

Most of the fuel stop solenoid valves of diesel engines are located next to the high-pressure oil pump. They are usually covered with a plastic rubber on the alloy surface, and sometimes have a pull wire or iron hook. The ignition switch of the vehicle When the engine is turned off or switched on, it can automatically suck to start or cut off the fuel. If it is a Cummins engine, its fuel solenoid valve is generally on the high-pressure oil pump, which is a small valve body.

What happens when a fuel solenoid fails?

Because the shut off solenoid valve is a valve that controls fuel. Therefore, long-term use will inevitably lead to valve blockage, magnetic force failure, and so on. Once this happens, the fuel input of the vehicle will also be affected, and it may stall or even fail to run. At the same time, if the damage or blockage is not very serious, there will be noise when the vehicle is running, and the engine coil will be short-circuited.

Solenoid valve installation attention

1. When installing, pay attention that the arrow on the valve body should be consistent with the flow direction of the medium. Do not install in places where there is direct dripping or splashing of water. The solenoid valves should be installed vertically upward.
2. The solenoid valve should be guaranteed to work normally within the fluctuation range of 15%-10% of the rated voltage.
3. After the solenoid valve is installed, there must be no reverse pressure difference in the pipeline. And it needs to be energized several times to make it suitable for temperature before it can be officially put into use.
4. The pipeline should be thoroughly cleaned before the solenoid valve is installed. The incoming medium should be free of impurities. Install a filter before the valve.
5. When the solenoid valve fails or is cleaned, in order to ensure the continuous operation of the system, a bypass device should be installed.