10. Brake and auxiliary systems
General information and security measures
General information
The scheme of the organization of a hydraulic actuator of brake mechanisms for three-channel ABS
5.04 — Main and auxiliary vacuum receivers |
26.03 — Pressure regulator 27.04 — Vacuum amplifier 31.01 — Electronic module of management 31.05 — Hydromodulator 34.02 — Tank of brake fluid |
The scheme of the organization of a hydraulic actuator of brake mechanisms for four-channel ABS
The scheme of an arrangement of the ABS/BAS/4-ETS/ESP components (1 of 4)
The scheme of an arrangement of the ABS/BAS/4-ETS/ESP components (2 of 4)
The scheme of an arrangement of the ABS/BAS/4-ETS/ESP components, - three-channel ABS (3 of 4)
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A1e17 — the Control lamp of ABS |
S76 — Switches of blocking of differentials |
The scheme of an arrangement of the ABS/BAS/4-ETS/ESP components, - four-channel ABS (4 of 4)
Forward and back all models considered in the present manual are equipped with disk brake mechanisms with supports of the fixed type in front and floating type behind.
The brake system consists of the main brake cylinder, the vacuum amplifier and disk brake mechanisms of forward and back wheels and is divided according to the diagonal scheme into two independent hydraulic contours. At refusal of any of contours (for example as a result of sealing violation) the second continues to function in the normal mode, providing adequate braking of the vehicle. In addition pressure valve regulator providing dynamic correction of effort of braking of back wheels according to change of load of a back axis of the car is built in contours of both back brake mechanisms. Liquid pressure in both contours is created by the main brake cylinder (MBC) having a tandem design. Activation of GTTs happens when squeezing a pedal of a foot brake.
The short description of the principles of functioning of auxiliary electronic systems of anti-blocking of brakes (ABS), strengthenings of emergency brake application (BAS), antiprobuksovochny (4-ETS) and antistrange (ESP) is provided in the Part Methods of operation and auxiliary systems.
The tank with brake fluid is fixed on the main thing brake cylinder (MTBC) and hydraulic a path of the brake system supplies with a working body all.
On petrol models the brake amplifier accumulates a part of the vacuum created in the inlet pipeline of the engine. On diesel models in view of lack of such source of depression the special vacuum pump is used. In case of need the special valve provides connection of the relevant source of depression, providing thereby strengthening of the influence developed by a pedal of a foot brake.
The parking brake with the manual drive influences through cables the special shoe assemblies which are a part of disk brake mechanisms of back wheels.
Operations procedure at operation of a control lamp of ABS during the movement
PERFORMANCE ORDER |
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Security measures
- Brake fluid is among highly toxic and chemically aggressive connections and at contact with body panels destroys a paint and varnish covering!
- The brake dust produced in the course of wear of brake shoes may contain unhealthy asbestos of the person, - at all do not inhale it when cleaning brake mechanisms!
- Work with the brake system demands special purity and exact observance of instructions. In the absence of necessary experience it is expedient to address on HUNDRED.
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At movement along wet roads it is necessary to press periodically a brake pedal for removal of moisture from brake disks; |
- In the course of rotation of a wheel moisture under the influence of centrifugal force is dumped from brake disks, but there is a silicone film, rubber attrition products, lubricant and other pollution reducing efficiency of braking!
- After installation of new brake shoes the last have to be earned extra, - try to avoid sharp braking the first 200 km of a run after replacement performance!
- The disk brake mechanisms damaged by corrosion when braking create the effect of jolting which is not disappearing over time, - replace disks!
- Burning of dirt to a surface of brake shoes is led to formation of furrows on a surface of brake disks that leads to decrease in efficiency of braking!