Chery S11 / Chery QQ. Manual — part 22

Chery QQ Service Manual Chassis System

Chapter 1 Braking System

Section one: Hydraulic brake

I. Special features of brake system configuration

QQ model is equipped with diagonal-split dual-circuit vacuum boost hydraulic

system. The braking system consists of two braking devices for driving and
parking respectively. The front wheel adopts the disc brake while the rear wheel
adopts the drum brake with automatic lash adjusting device. The whole system
is equipped with the highly efficient vacuum booster and dual-circuit hydraulic
master cylinder.

The QQ cars (for some models) are also equipped with the ABS system. By

applying the ABS system, the control for steering in the process of braking as
well as the efficiency for braking has been greatly improved. The adoption of
the ABS system can avoid the abrupt braking of the wheels, and keep the tires
always in the status of maximum vertical adhesion force, which ensures both the
operability of the front wheels and the prevention of side slips of the rear
wheels so as to ensure that the car brake can be made under the maximum road
surface adhesion factors.

QQ Car Brake System

1-Brake mast cylinder; 2- Liquid storage tank;3 -Vacuum actuator; 4-Brake

pedal;5-B raking line;6-Rear wheel drum type brake;7-Front wheel disc type
brake;

The static status braking control mechanisms are arranged in between the

front seats, which directly act on the brake arms of the two rear wheels by way
of the sheathed wires with small friction resistance. The rear wheel brake also

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Chery QQ Service Manual Chassis System

acts as the static status brake, featuring simple configuration and practicality
as well as high efficiency in operations. The braking pipeline system of the
QQ cars adopts the diagonally arrayed dual-loop braking system. The front chamber
of the main cylinder is connected to the brake of the left front wheel and the
brake on the right of the rear shaft. The rear chamber of the main cylinder is
connected to the brakes of the right front wheel and the left rear wheel. Such
arrangement is based on the idea of simple configuration. In the event that either
loop fails to perform properly, the remaining braking force will keep up to 50
% of the normal value. That means no matter which loop fails to work, the basic
requirements for braking can still be satisfied.

1、 Front steering knuckle and disk type brake assembly; 2、Braking pawl
fastening screw; 3、Steering knuckle; 4、Bearing; 5、Dust shield; 6、
Brake disk; 7、Front wheel hub; 8、Jump ring; 9、Fastening screw; 10、
Braking branch pump; 11、Friction block;

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Chery QQ Service Manual Chassis System

1. Brake base plate; 2. Branch pump; 3. Brake shoe; 4. Upper reset spring of
brake shoe; 5. Brake spacing self adjustment assembly; 6. Bolt; 7. Lower reset
spring of brake shoe; 8. Spring; 9. Dust-proof cover; 10. Brake drum locking
screw nut; 11. Jump ring; 12. Guard ring; 13. Bearing; 14. Brake drum; 15. Rear
wheel brake assembly;

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Chery QQ Service Manual Chassis System

1. Parking brake system;2. Bolt; 3. Nut; 4. Lock pin; 5. Parking brake cable;
7. Axis pin;8..Ap ron;9. Cable rubber sheath

1. Schematic diagram of brake alarming system

1）. Refer to the “Schematic Diagram of Instruments” for the brake liquid sensor

and static brake switch electric circuitry;

2）. Refer to the Schematic Diagram of Brake Lights for the electric circuitry

of the brake switch.

2. Diagnostic information and procedures

1). Checklist for hydraulic brake diagnostic system

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