GB/T 25350-2010Technology specification for cleaning fuel supply system of ethanol gasoline vehicles (English PDF)

1 Scope

This Standard specifies the fuel supply system cleaning project and technical requirements, operation process, inspection and commissioning, quality assurance period for gasoline vehicles before they use ethanol gasoline for the first time.

This Standard is applicable to cleaning fuel supply system of ethanol gasoline vehicles which have been driving for more than 30,000 km prior to the first use of ethanol gasoline.

2 Cleaning items and technical requirements

See Table 1 for cleaning items and technical requirements. The process flow is shown in Figure 1.

Table 1 Cleaning items and technical requirements

No. Item Technical requirements

1 Fuel tank

a) No dirt, rust, glial particles, accumulated water in the tank;

b) Fuel tank pads are intact, fast and reliable, without wear, oil spill;

c) No dirt in tank breathing valve, easy access and easy exhaust;

d) The oil sensor float is alcohol resistant material.

2 Fuel pump

a) Clean, no impurities inside and outside of fuel pump;

b) The pump membrane is alcohol resistant material;

c) The fuel filter is clean, smooth, without dirt.

3 Fuel filter

a) Replace the disposable fuel filter;

b) No dirt inside and outside the detachable fuel filter; filter is resistant alcohol filter such as metal grid or ceramic material.

4 Injector No carbon deposition, blockage, drip oil leakage phenomenon

5 Tubing

a) Tubing is resistant to alcohol;

b) Pipeline is clean and smooth;

c) No sag, crack or leakage joints;

d) The tubing connector is alcohol resistant material.

6

Fuel evaporation control device a) Pipeline is resistant to alcohol, clean and smooth;

b) The surface of the activated carbon tank is not damaged;

c) Activated carbon is effective.

4 Inspection and debugging

5 Quality assurance period

Calculated from the date of completion and exit-factory, the vehicle shall travel

2000 km or 10d, whichever comes first.

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