QC/T 271-2021Rain-proof sealing test method for mini trucks (English PDF)

1 Scope

This document specifies the test conditions and test methods for the rainproof performance for mini truck.

This document is applicable to mini truck. The category M1 vehicles and their variants, which have a vehicle length of less than or equal to 3500 mm, can be implemented with reference to it. This document does not apply to low-speed goods trucks.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, for dated references, only the version corresponding to the date is applicable to this document; for undated references, the latest version (including all amendments) is applicable to this document.

GB/T 4780 Terms for motor vehicle body

GB/T 15089 Classification of power-driven vehicles and trailers

GB 18384 Electric vehicles safety requirements

3 Terms and definitions

The terms and definitions as defined in GB/T 4780 and GB/T 15089, as well as the following terms and definitions, apply to this document.

4 Test conditions

4.2.2 See Appendix A for the rain shower arrangement, OR it may be specified separately according to the requirements of the manufacturer.

4.2.3 The rain shower device shall ensure that the average raining intensity of the front of the vehicle is (12 ± 1) mm/min; the average raining intensity of the side, rear, top, bottom of the vehicle is (8 ± 1) mm/min. See Appendix B for the adjustment method of the raining intensity. Regularly check whether the rain intensity meets the requirements.

5 Test method

5.1 Before the test starts, the vehicle fault code shall be cleared AND ensure that the fault code does not appear again. The vehicle shall be warmed up (high beams and fog lights need to be turned on) AND reach normal operating temperature.

5.2 Park the test vehicle at the designated location in the rainy field. Put the parking brake in the braking state. Turn off the power system. Turn off the lighting device. Start the air-conditioning fan. Switch it to the external circulation mode. Adjust the wind speed to the highest gear. The test personnel enter the cabin AND close all doors, windows, hatches.

5.3 Start the shower device. Start the test after the raining state is stable. The test time is 15 minutes.

5.4 At 5 minutes after the start of the test, start to observe and record the leakage (such as seepage, dripping, flow) of various parts of the passenger compartment.

5.5 After the rain is over, check whether the horn, lighting device, wiper work normally.

5.6 Check whether there is water in the door and sunroof.

5.7 For the luggage compartment and cargo compartment, it shall wipe off the accumulated water at the seam of the luggage compartment or cargo compartment door first; then open the luggage compartment or cargo compartment door; observe and record the leakage of the luggage compartment or cargo compartment.

5.8 For electric vehicles, they shall meet the insulation resistance requirements, which are specified in GB 18384.

5.9 Drive for 10 km normally. Then check it according to the following requirements:

a) Check whether there is a new fault code;

b) Check each lighting device for water and fog;

c) Check whether the windows and electric doors are working normally;

Appendix A (Informative) Rain shower