Anti-lock braking system (ABS) (Renault Espace I)

Second-generation cars can be equipped with an anti-lock braking system. The system does not require frequent repairs. The diagram of the braking system with ABS and the location of its individual components are shown in Illustration 21.1. The main difference of such a system is the installation of disc rear brakes on cars that usually have drum rear brakes.



The main part of the system is the hydraulic pressure sensor in the system, which consists of a hydraulic module (1) with an electric pump (b) and four control valves (a). Further connected to the system is a computer with an automatic recording of damage diagnostics (2), four speed sensors on each wheel (4), four toothed rims (5), which are installed on the drive shafts of the front wheels and the hubs of the rear wheels, as well as a warning lamp installed on the instrument panel. The main brake cylinder and brake booster (9) in assembly provide pressure to all four brake calipers (8).



A microcomputer controls the system and is located in the engine compartment. The ABS relay is also located in the engine compartment in a black box. The hydraulic module is shown in Figure 21.2. Each wheel is equipped with a speed sensor. Toothed rims in each brake disc receive the speed of each wheel in time intervals and transmit the corresponding data to the control module. The toothed rims of the rear wheels are mounted in the hubs and cannot be separated.

Text provided by an online resource (RenaultBook)



A warning light on the instrument panel indicates that the system is functioning.