How often is it appropriate to clean automobile fuel nozzles?

It is recommended to clean the oil nozzle every 2 years or about 4 to 6 kilometers.

Of course, the nozzle of the engine needs cleaning. The nozzle injects gasoline, which is self-cleaning. Nozzle is blocked by colloid or carbon deposit, which affects the consistency of flow rate of each nozzle or the nozzle leaks. If the flow error of each nozzle is greater than 5%, the emission will deteriorate, which will further affect the power and fuel consumption.

The following figure shows the structure of the fuel injector.

The blockage problem of fuel injectors mainly occurs in three parts:

1, the oil inlet screen is blocked.

Impurities or colloids in gasoline are attached to the filter screen, which weakens the passing capacity of gasoline and seriously affects the flow rate of fuel injectors.

2. The sealing surface at the mouth of multi-point injection nozzle.

If there is glue, it will lead to poor sealing of fuel nozzle and oil leakage.

3. The spray hole is blocked

Generally, the fuel injector has many spray holes. Although the nozzle hole is not a metering hole, it will affect the atomization effect, and the fuel injection quantity will also be affected if it is blocked too much.

Generally, the nozzle can be cleaned once every 2 years or 50,000 to 80,000 kilometers, depending on the gasoline quality in the area where the vehicle is used.

There are two ways to clean the nozzle: one is disassembly-free cleaning and the other is disassembly-free cleaning.

Disassembly-free cleaning: use special nozzle cleaning agent to directly replace gasoline. When the engine is running, the cleaning agent flows out through the nozzle to achieve the purpose of cleaning. This method is suitable for vehicles with low mileage, less carbon deposit and serious congestion.

Dismantling and cleaning: Dismantle the fuel nozzle and use ultrasonic cleaning. Relatively speaking, this method is more thorough and the effect is very obvious. However, the disassembly workload is large, and professionals are needed to clean the equipment.