
Chassis electrical
546
Figure 14.4 ABS Hydraulic modulator; (a) Normal pressure build-up; (b) holding phase;
(c) Reducing
M
8
1
7
6
3
2
LH
RV
RH
LV
5
4
Figure 14.5 Hydraulic system for Bosch ABS-8 system 1 Master cylinder, 2 Wheel-
brake cylinder, 3 Hydraulic modulator, Inlet valves, 5 Outlet valves, 6 Return pump,
7 Accumulator, 8 Pump motor. V front, H rear, R right, L left.
14.1.5 Anti-lock brake system control
The control of ABS can be summarized under a number of headings as given below.
Brake pressure control commencement
The start of ABS engagement is known as ‘rst control cycle smoothing’. This
smoothing stage is necessary in order not to react to minor ...