What Happens When the Injection Nozzle Pressure of a Diesel Vehicle is Insufficient?

[DeSarah]

Insufficient injection nozzle pressure in a diesel vehicle can cause the internal needle valve to fail to close tightly. Here are additional details: 1. Causes of low injection pressure: Excessive clearance between the needle valve guide and the needle valve body or poor sealing of the needle valve cone surface; poor sealing between the injection nozzle and the injector body contact surface; loose adjusting screw; insufficient or broken pressure regulating spring. If the injection pressure is too high or too low, the injector should be disassembled, cleaned, and undergo corresponding adjustments and repairs. 2. Hazards of low injection pressure: If the pressure is set too low, the atomization quality of the fuel will significantly decrease, diesel consumption will increase, and the diesel engine will be difficult to start. Even if it starts, incomplete combustion in the diesel engine will cause continuous black smoke from the exhaust pipe, and carbon deposits will easily form on the injection nozzle needle valve. If the injection pressure is set too high, it can cause knocking sounds during diesel engine operation, reduce power output, accelerate wear on the injection pump plunger assembly and injector, and sometimes even rupture the high-pressure pipe.