2012 SSANGYONG NEW ACTYON SPORTS brake

09-26
1. OVERVIEW
Even though a driver cuts off the power, while driving, the vehicle continues to move due to the
law of inertia. Therefore, a braking device is needed to stop the vehicle. The brake system
normally uses the frictional discs that converts the kinetic energy to the thermal energy by
frictional operation. The brake system consists of the brake disc (front wheel), brake disc or drum
(rear wheel), parking brake (mechanical type), master cylinder, booster, pedal and supply lines
(pipes and hoses).
Hydraulic Brake ▶
Brake Pedal ▶This system uses the leverage effect and
Pascal's principle. When depressing the
brake pedal, the pedal pressure is increased
by booster and is delivered to master cylinder
to generate hydraulic pressure. The hydraulic
pressure generated by the master cylinder is
delivered to the brake caliper through the
brake pipes or hoses. This hydraulic pressure
pushes the brake calipers, accordingly the
caliper pads are contacted to brake disc to
generate the braking force.
Brake pedal uses the leverage effect to apply
bigger force to the brake master cylinder.

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Braking distance & stopping distance ▶
Stopping distance = free running distance + braking distance
What is stopping distance?
A certain distance (free running distance + braking distance) is needed from the moment an
obstacle appears ahead until you bring your vehicle to a complete stop. This is called as stopping
distance.
What is braking distance?
Tire slip occurs until the vehicle stops completely when the the brake is applied.
This slip is what we call a braking distance.
What is free running distance?
The free running distance is the time from the driver sees the obstacles and begins to prepare for
depressing the brake pedal until the moment the brake pedal is depressed.

09-28
Front Brake AssemblyFront Wheel Speed Sensor (4WD)
HECU
2. SYSTEM LAYOUT
Master Cylinder and Booster
Brake Pedal

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Rear Wheel Speed Sensor (4WD)
Rear Brake Assembly
ABS/EBD Indicators
Parking Brake Lever
Parking Brake

09-30
3. PARKING BRAKE
Front Disc Brake ▶
Brake caliper
Brake hubBrake disc Air breather
Drive shaft
Lower arm ball jointBrake pad
Upper arm connection
2-way piston
Brake caliper
Tie rod end connection
Knuckle
Backing plate
Lower arm connection

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Rear Disc Brake ▶
Brake caliper
Rear shock absorberBrake disc Air breather
Brake hub Brake pad
Brake hose
one-way pistonBrake caliper
Air breather
Backing plate

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4. HYDRAULIC CIRCUIT
Brake booster
Brake fluid reservoir and master cylinder
Front disc brake and caliper 1.
2.
3.HECU (Hydraulic & Electric Control Unit)
Rear disc brake and caliper 4.
5.

10-6
1. SYSTEM OVERVIEW
1) What is ABS?
When braking suddenly or braking on slippery roads, the vehicle keeps moving forward but the
wheels are locking and not rotating. If these happen, the vehicle may lose stability or rotate
resulting in an accident. ABS helps to maintain directional stability and control of the vehicle. ABS
is designed to secure more safety and increase the control of steering wheel during emergency
braking situation. But, ABS does not guarantee perfect safety beyond its physical limit. ABS in
this vehicle contains EBD function. In normal driving conditions, the brake system operates
without ABS function.
2) What is EBD (Electronic Brake-force Distribution)?
EBD is an automobile brake technology that automatically varies the amount of force applied to
each of a vehicle's brakes, based on road conditions, speed, loading, etc. Always coupled with
anti-lock braking systems, EBD can apply more or less braking pressure to each wheel in order to
maximize stopping power whilst maintaining vehicular control. EBD does not operate when ABS is
working.
ABS effect according to braking conditions ▶
Braking on split road Maneuvering while braking