Dynamic Driving Safety Systems
ABS
•
The HU consists of the hydraulic pump and of 6…12 solenoid controlled hydraulic
valves. One inlet and one outlet valve for each wheel (for B-Series only one inlet and
one outlet valve for the rear axle), two traction control valves for vehicles with TCS and
two additional stability control valves for vehicles with DSC. The HU cannot be
disassembled.
•
Most HUs feature a flow control valve downstream of each inlet valve. The flow control
valve has been integrated to reduce the brake fluid flow noise by narrowing a passage,
and is actuated hydraulically in case of a high-pressure difference upstream and
downstream of the inlet valve.
NOTE: Always keep in mind, that the Dynamic Driving Safety Systems cannot override the
law’s of physics.
L2003_02002
1
Control module
4
ABS pump motor
2
Hydraulic unit
5
Lock lever for connector
3
Brake pipe
6
ABS connector / wiring loom
Curriculum Training
02-3