Automatic Pneumatic Braking
Anti-Lock Braking System (ABS) and Anti-Slip Regulation (ASR)
2nd Edition
This publication is not subject to an updating service. New versions can be found in INFORM under www.wabco-auto.com
© Copyright WABCO 2011
Vehicle Control Systems
We reserve the right to make changes Version 002/02.11 815 010 194 3
ABS Training
Table of contents
Anti-Lock Braking System (ABS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Anti-Slip Regulation (ASR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 RSC and ESC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Development . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Theoretical ABS basics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Theoretical ASR basics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Operation of the ABS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Operation of ASR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 ABS and ASR components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Structure of an EC Air Braking System with ABS / ASR fitted in the towing vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Structure of an air braking system with ABS E (with ESC/RSC) and ASR in the towing vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Structure of an EC Air Braking System with ABS fitted in the trailer / semitrailer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Electronic Control Unit (ECU) 446 003/004 ... 0 on the towing vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 VARIO-C Control Unit for Trailer ABS 446 105 ... 0 . . . . . . . . . .
2nd Edition
This publication is not subject to an updating service. New versions can be found in INFORM under www.wabco-auto.com
© Copyright WABCO 2011
Vehicle Control Systems
We reserve the right to make changes Version 002/02.11 815 010 194 3
ABS Training
Table of contents
Anti-Lock Braking System (ABS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Anti-Slip Regulation (ASR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 RSC and ESC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Development . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Theoretical ABS basics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Theoretical ASR basics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Operation of the ABS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Operation of ASR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 ABS and ASR components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Structure of an EC Air Braking System with ABS / ASR fitted in the towing vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Structure of an air braking system with ABS E (with ESC/RSC) and ASR in the towing vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Structure of an EC Air Braking System with ABS fitted in the trailer / semitrailer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Electronic Control Unit (ECU) 446 003/004 ... 0 on the towing vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 VARIO-C Control Unit for Trailer ABS 446 105 ... 0 . . . . . . . . . .