Is it qualified that the emergency braking of road test vehicles does not exceed the experimental passage?

On the brake test bench, the braking force on each wheel can be detected, and the total braking force, braking force sum, braking force difference, braking balance, parking braking force and other indicators of the car can be calculated, so as to judge whether the braking performance of the car is qualified.

The braking efficiency of road test can not test the braking force of each wheel, but can test the braking ability of the whole vehicle.

Usually expressed by the braking distance of 100 km, the specific method is:

Accelerate the car to a speed above 100 km, and then slow down freely. When the speed drops to 100 km per hour, the driver will step on the brakes with all his strength and stop the car in the shortest distance.

Then we measure the distance from the braking point to the complete stop of the car. This distance is the braking distance of the car 100 km.

For an ordinary bus, the braking distance is generally between 33 and 48 meters. Our standards are: 33 to 37 meters is excellent, 37 to 4 1 meter is good, and 4 1 to 45 meters is qualified. If the braking distance exceeds 45 meters, it can't be said that the braking performance of this car is unqualified, only that the braking performance of this car is poor.