Service Infiniti QX4 since 1996 of release
1. Introduction
2. The maintenance instruction
3. Routine maintenance
4. The engine
5. Cooling and heating systems
6. Power supply systems and managements
7. Start and charge systems
8. A transmissionnaja line
9. Brake system
9.1. Specifications
9.2. System of antiblocking of brakes (ABS) - the general information and codes of malfunctions
9.3. Check of a condition and replacement of brake lines and hoses
9.4. Replacement колодок disk brake mechanisms of forward wheels
9.5. Removal and installation of a support of the disk brake mechanism
9.6. Removal and installation of a brake disk
9.7. Replacement of brake boots of drum-type brake mechanisms of back wheels
9.8. Removal and installation of the main brake cylinder (ГТЦ)
9.9. Removal and installation of assemblage of the vacuum amplifier of brakes
9.10. Prorolling of brake system
9.11. Adjustment of a drive of a lay brake
9.12. Adjustments of a pedal of a foot brake
9.13. Adjustment of a spring of the valve-regulator sensitive to loading (LSV)
9.14. Adjustment of gauges-switches of stoplights and темпостата
9.15. Removal and hydromodulator ABS installation
9.16. Removal and G-gauge installation
9.17. Check of serviceability of functioning of wheel gauges ABS
9.18. Check of serviceability of functioning of the G-gauge
9.19. Check of serviceability of functioning of the relay приводного the hydromodulator electromotor
9.20. Check of serviceability of functioning of the relay of the electromagnetic valve of hydraulic modulator ABS
10. A suspension bracket and a steering
11. A body
12. An electric equipment
 












9-tormoznaya-sistema.html

9. Brake system

All models of cars Infiniti are equipped by hydraulic brake system with vacuum strengthening. On forward wheels disk brake mechanisms, on back — drum-type are always established.

All brake mechanisms are equipped by self-regulators. Thus indemnification of deterioration brake колодок disk mechanisms is carried out automatically whereas, on drum-type brake mechanisms the special adjusting devices which activation occurs during braking, and also at raising of a lay brake are established.

The dual design of the main brake cylinder (ГТЦ) allows to break a hydraulic path into two, operating independently from each other, a contour (forward and back) (the Function chart of a hydraulic path see an illustration). In default one of the contours, the second continues to work in a former mode, providing adequate braking of the car. Infringement of serviceability of functioning of any of contours, naturally, conducts to decrease in efficiency of braking and is accompanied by operation of a corresponding control lamp on an instrument guard (see the Head of System of cooling and heating) at squeezing of a pedal of a foot brake.

The back brake contour is equipped by the valve-regulator providing updating of hydraulic pressure at change of height of a road gleam of a back axis.

ГТЦ it is established on assemblage of the servo-driver of the vacuum amplifier of the brakes, fixed on a back partition of an impellent compartment. From above on the cylinder the big tank of a hydraulic liquid equipped with a plastic cover is located. The tank fastens in the cylinder by means of plugs through passage and a cylindrical pin.

As already it was mentioned above, ГТЦ has the dual design providing functioning of two independent hydraulic contours. Pressure of a liquid in each of contours is forced by the individual piston in the main cylinder.

The servo-driver of the vacuum amplifier is fixed on a back partition of an impellent compartment. The amplifier uses depression created in the inlet pipeline for increase of efficiency of functioning of a hydrodrive of brake system. From told clearly that the servo-driver functions only at the working engine that it is necessary to consider at towage of the car with the switched off engine, — resistance of a pedal of a foot brake to squeezing considerably increases, and the brake way increases.

The control lever of a lay brake is located in salon of the car and influences a draught rod to which the pair приводных cables (on one on each of brake mechanisms of back wheels is attached). At raising of the lever cables delay the executive levers attached to assemblages of brake boots in mechanisms of both back wheels. Thus boots get divorced in the parties, nestling on a working surface of drums. On models with disk brake mechanisms of back wheels levers are attached to actuation mechanisms of screw type in cases of supports. Levers influence pistons of supports, forcing колодки to nestle on brake disks.


Function chart of a hydraulic path


On page back
8.4.3. Condition check карданных shaft
On the following page
9.1. Specifications