What is the reason why diesel fuel injectors do not inject fuel?

The nozzle of diesel engine does not inject oil, or the nozzle hole is blocked. It can be dredged with a needle, and it should be carefully cleaned after dredging. If the cylindrical surface of the needle valve is seriously worn, the needle valve couples should be replaced in pairs.

The work of injector plays an important role in the power of each engine. Due to poor fuel, the injector does not work normally, resulting in serious carbon deposition in the cylinder; The accelerated wear of cylinder and piston ring will cause unstable idle speed, rising fuel consumption, weak acceleration, difficult start-up, excessive emission, complete blockage of injector and damage to engine.

Therefore, it is necessary to clean the nozzle regularly. Long-term non-cleaning or frequent cleaning of the nozzle will have a bad influence.

Extended data

The injector itself is a normally closed valve (normally closed valve means that the valve is always closed when there is no control signal input; When there is no control signal input, the normally open valve is always open. The valve needle moves up and down to control the opening and closing of the valve. When the ECU sends the fuel injection instruction, its voltage signal will make the current flow through the coil in the fuel injector, generate a magnetic field to attract the valve needle and open the valve, so that the fuel can be ejected from the fuel injection hole. ?

The biggest advantage of jet fuel supply is that the control of fuel supply is very accurate, so that the engine can have the correct air-fuel ratio in any state, which not only keeps the engine running smoothly, but also conforms to the norms of environmental protection laws and regulations.