WABCO · 32 стр.
Оригинальное название: EBS Electronically controlled Brake system in motor coaches
EBS Electronically controlled Brake system in motor coaches System and functional description 1. Edition © Copyright WABCO 2003 Vehicle Control Systems An American Standard Company 8150004083 The right of amendment is reserved Version 001/07.01
Page 1. Introduction / Advantages of EBS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. System structure in buses System structure 2-axle bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 WABCO EBS construction kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 System variants . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Wiring diagram 2-axle bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.7 Wiring diagram 3-axle bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8 3. Description of components Brake signal transmitter 480 00. ... 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 EBS central module 446 135 ... 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 Proportional relay valve 480 202 ... 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11 3/2 relay valve 480 205 ... 0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12 Axle modulator 480 103 ... 0. .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13 4. Description of EBS function Function of the electro-pneumatic unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14 Function of pneumatic redundancy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14 Additional redundancy on the front axle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Rear axle redundancy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15 Electrical / electronic structure . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . 15 Control functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 Backup functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17 Halt brake, brake hold and release aid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17 5. Error recognition and display Error recognition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18 Error display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . .19 6. EBS ”emergency modes” / EBS test types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20 7. WABCO PC - Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21 Diagnostic equipment for WABCO EBS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22 Diagnostic Software EBS Euro . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 8. Parameter Setting Parameter setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.30 Table of Contents EBS 2
Introduction Increased brake safety The demands made on braking systems are increasing steadily. Therefore, the development and introduction of an electronic braking system (EBS) is a logical step. WABCO did not only take existing regulations into consideration while developing EBS. Top priority was given to safety and user advantages. This is why a vehicle with EBS can clearly do more than is required by law. EBS increases traffic safety through reduced stopping distance and improved brake stability. The full diagnosis and surveillance functions as well as the display of brake lining wear offer an effective fleet logistics.
The high safety quality attributed to EBS is due to several factors: Braking time is reduced through shorter response time and pressure build-up time of the brakes on the front and rear axle(s). Advantages of EBS EBS reduces service costs considerably. The improved ABS function increases vehicle stability when brakes are activated. The components of the front and rear axle braking system and brake lining wear are monitored permanently. The electronic braking system has a lot of functions. The aim is to maximise braking safety at reduced costs, for instance by optimising wheel brake lining wear.
The integrated ASR function also provides optimum vehicle stability and traction during start and acceleration. Setting pressure, according to wear criteria, to the front and rear axle results in uniform lining wear. Overall wear is minimised by making the load on all wheel brakes uniform. Moreover, servicing and lining replacement are done at the same time. This reduces down-time costs. Depending on the vehicle utilisation profile and other factors, this also means considerable savings for the vehicle user. In terms of wheel brake service costs alone, a firsthand owner will save more money with an electronically braked bus than with a vehicle with a conventional braking system.
Introduction / Advantages of EBS EBS 1. 3
EBS braking system for buses with no attachment (4S/4M system) 9 10 8 11 1 2 12 13 6 7 3 4 14 5 Legend: EBS components: Other components: 2 Brake signal transmitter 1 EBS central module 8 Compressor 9 Air dryer 3 Proportional relay valve 10 Four-circuit protection valve 4 ABS solenoid valve 11 Air reservoir 5 Axle modulator 12 Hand brake valve 6 3/2 relay valve 13 Relay valve FBA 7 ABS sensors 14 Brake cylinder System structure in buses 2. EBS 4