Page 1133 - Foton Workshop Manual - Auman EST-M

Brake system – service brake (air pressure) BR-1

IN
Service Brake (Air Pressure) System

Overview DI

1. Function
EG
a. The vehicle has certain energy of motion when driving at certain speed. When the driving speed increases,
in order to reduce the speed or stop the vehicle, must apply a force with the direction opposite to the driving
direction. This force is called braking force. The vehicle braking system is the device generating braking TR
force.

b. The driver can control the braking force according to the situation of road and traffic to realize certain AX
forced braking so as to reduce the vehicle speed or stop the vehicle.
c. When driving down a slope, in order to maintain the speed of vehicle, it is necessary to use the braking FR
system.
2. Working principle
ST
The braking system adopts friction braking. The wheel brake utilizes friction to brake the wheels. The friction
force between the tyres and ground stops the vehicle. Therefore, the essence of braking is to convert the
BR
vehicle dynamic to other types of energy (normally heat energy) by force, which expands to atmospheric
environment.
BW
3. Composition
The brake system consists of air source, service brake, parking brake, wheel brake, exhaust brake and signal,
EL
auxiliary brake.
4. Requirements for the braking system
a. Good braking performance Including braking efficiency, stability of braking efficiency and direction
stability at braking.
The evaluation criteria for braking efficiency include braking distance, braking deceleration, braking force and
time. The constancy of braking efficiency refers to resistance to heat fading and water fading. The direction
stability during braking means the ability of keeping original driving direction when braking, i.e. no off
tracking, no side slipping.
b. Easy to operate

c. The braking stability is ok. The braking torque can increase rapidly and stably as well as release rapidly and
thoroughly.

BR-001