2017 China Car Performance Challenge T Group Rules stipulate the vehicle type & grouping, vehicles technical specifications, competition events, score evaluation, driver selection of the year and rules version. Competition events include power project, braking project, control stability project, quietness project, site timing game, energy saving and environmental protection project, SUV passability project, convenience project (windscreen defrosting in winter).
1. Concrete content of quietness project
1.1 Competition subjects
Idling interior noise, vehicle interior noise at constant speed of 50km/h and 100km/h
1.2 Track layout
Single departure mode, There are idle measurement zone, acceleration adjustment zone, uniform noise measurement zone, deceleration zone composition. Draw up the map of the track layout as shown in the following figure:
1.3 Competition instructions and requirements
1.3.1 The competition takes place on the noise path of testing ground. Single departure mode, round trip to one cycle finish two measurements of Idling interior noise, vehicle interior noise at constant speed of 50km/h and 100km/h. The specific measurement zone is determined by the project referee according to the actual driving conditions. The departure shall be subject to the referee's flag. After the referee waves the flag, the vehicle is started stationary from the starting point. The vehicles follow the prescribed route until the competition finish.
1.3.2 The test points are for driver's seat. The seat and headrest shall be in the middle of the adjustable range. Seat back should be as close as possible to vertical position. The measuring instrument (sound level meter) is arranged as shown below:
1.3.3 The direction of maximum sensitivity of the measuring instrument shall be pointed straight ahead of the vehicle.
1.3.4 Idling interior noise: vehicle rest, start the engine, after stabilization, measure the interior noise value of the engine at idle speed. The measurement time is 6s. Record the LAeq value of the interior noise of the vehicle.
1.3.5 After the vehicle reaches the specified speed within the specified distance, start sound acquisition device record noise value. The vehicle shall then be maintained at a speed of 50 km/h (48km/h-52km/h) or 100km/h (98km/h-102km/h) for at least 6 seconds. Record the LAeq value of the interior noise of the vehicle. Speed is displayed on the display screen of the professional test equipment.
1.3.6 The vehicle must complete two measurements of idling interior noise and vehicle interior noise at constant speed of 50km/h and 100km/h. The results are selected from the effective results of the two measurements.
1.4 DNF, Did Not Finish
1.4.1 The race vehicle speed is not kept at a prescribed speed for a long period of time as required by the rule.
1.4.2 Other violations.
1.5 Record of score
LAeq value of idling interior noise, vehicle interior noise at constant speed of 50km/h and 100km/h; the unit is dB. One point after the decimal point is retained.
2. The weight of quietness project
The weight of the quietness project in the car is 15%; it in the MPV is 25%; it in the SUV is 15%.