1、_ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising there
2、from, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2009 SAE International All rights reserved. No part of this publication m
3、ay be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: 724-776-4970 (outside USA)
4、 Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SURFACE VEHICLE RECOMMENDED PRACTICE J2627 AUG2009 Issued 2002-09 Revised 2009-08 Superseding J2627 SEP2002 Braking System DefinitionsTruck and Bus RATIONALE The purpose of this revision is to update the Braking Syst
5、em definitions used by the Truck and Bus braking industry. 1. SCOPE This SAE Recommended Practice identifies and defines terms specifically related to truck and bus braking systems including Antilock Brake Systems (ABS) and Electronically Controlled Braking Systems (ECBS). 2. REFERENCES 2.1 Applicab
6、le Publications The following publications form a part of this specification to the extent specified herein. Unless otherwise specified, the latest issue of SAE publications shall apply. 2.1.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel:
7、877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. SAE J560 Primary and Auxiliary Seven Conductor Electrical Connector for Truck-Trailer Jumper Cable SAE J592 Sidemarker Lamps for Use on Road Vehicles Less than 2032 mm in Overall Width SAE J656 Automotive Brake Definiti
8、ons and Nomenclature SAE J1455 Recommended Environmental Practices for Electronic Equipment Design in Heavy-Duty Vehicle Applications SAE J1587 Electronic Data Interchange Between Microcomputer Systems in Heavy-Duty Vehicle Applications SAE J1708 Serial Data Communications Between Microcomputer Syst
9、ems in Heavy-Duty Vehicle Applications SAE J1922 Powertrain Control Interface for Electronic Controls Used in Medium- and Heavy-Duty Diesel On-Highway Vehicle Applications SAE J2627 Revised AUG2009 Page 2 of 13 SAE J1939 Recommended Practice for a Serial Control and Communications Vehicle Network SA
10、E J1939-01 Recommended Practice for Control and Communications Network for On-Highway Equipment SAE J1939-11 Physical Layer, 250K bits/s, Twisted Shielded Pair SAE J1939-13 Off-Board Diagnostic Connector SAE J1939-21 Data Link Layer SAE J1939-31 Network Layer SAE J1939-71 Vehicle Application Layer S
11、AE J1939-73 Application LayerDiagnostics SAE J1939-81 Network Management SAE J2497 Power Line Carrier Communications for Commercial Vehicles 2.1.2 FMVSS Publication Available from the Document Automation and Production Service (DAPS), Building 4/D, 700 Robbins Avenue, Philadelphia, PA 19111-5094, Te
12、l: 215-697-6257, http:/assist.daps.dla.mil/quicksearch/. Federal Motor Vehicle Safety Standard 121 Air Brake Systems Federal Motor Vehicle Safety Standard 105 Hydraulic and Electric Brake Systems 2.1.3 ECE Publication Available from United Nations Economic Commission for Europe, Palais des Nations,
13、CH-1211, Geneva 10, Switzerland, Tel: +41-0-22-917-12-34, www.unece.org. ECE R13 Uniform provisions concerning the approval of vehicles of categories M, N and O with regard to braking 2.1.4 ISO Publications Available from ANSI, 25 West 43rd Street, New York, NY 10036-8002, Tel: 212-642-4900, www.ans
14、i.org. ISO 9141 Road vehiclesDiagnostic systemsRequirements for interchange of digital information ISO 11992-1 Road vehiclesInterchange of digital information on electrical connections between towing and towed vehiclesPart 1: Physical layer and data-link layerSecond edition ISO 11992-2 Road vehicles
15、Interchange of digital information on electrical connections between towing and towed vehiclesPart 2: Application layer for brakes and running gearSecond edition ISO 14230 Road vehiclesDiagnostic systems KWP2000 (Parts 1-4) SAE J2627 Revised AUG2009 Page 3 of 13 3. DEFINITIONS 3.1 1P-1E ECBS Configu
16、ration An Electronically Controlled Braking System in which a single electronic control signal is overlaid onto a single pressure control signal to operate the foundation brakes under normal conditions. 3.2 2P Configuration A pneumatically controlled braking system in which two isolated pneumatic si
17、gnals control the service brake system. 3.3 2P-1E ECBS Configuration An Electronically Controlled Braking System in which a single electronic control signal is overlaid onto the traditional dual pneumatic brake signals to operate the foundation brakes under normal conditions. 3.4 2E ECBS Configurati
18、on An Electronically Controlled Braking System in which two isolated electronic signals control the service brake system. 3.5 2s-1m An ABS or ECBS control system in which two wheel speed sensors provide the input for control of a single pressure-modulation valve. 3.6 2s-2m An ABS or ECBS control sys
19、tem in which two wheel speed sensors provide the input for control of two modulation valves. 3.7 4s-2m Axle Control An ABS or ECBS control system in which four wheel speed sensors provide the input for the control of two pressure-modulation valves that are operated in axle-by-axle mode. 3.8 4s-2m Si
20、de Control An ABS or ECBS control system in which four wheel speed sensors provide the input for the control of two pressure-modulation valves that are operated in side-by-side mode. 3.9 4s-3m An ABS or ECBS control system in which four wheel speed sensors provide the input for control of three pres
21、sure-modulation valves. 3.10 4s-4m An ABS or ECBS control system in which four wheel speed sensors provide the input for control of four pressure-modulation valves. 3.11 6s-4m An ABS or ECBS control system in which six wheel speed sensors provide the input for control of four pressure-modulation val
22、ves. 3.12 6s-5m An ABS or ECBS control system in which six wheel speed sensors provide the input for control of five pressure-modulation valves. SAE J2627 Revised AUG2009 Page 4 of 13 3.13 6s-6m An ABS or ECBS control system in which six wheel speed sensors provide the input for control of six press
23、ure-modulation valves. 3.14 ABS (per FMVSS-121) Antilock brake system or ABS means a portion of a service brake system that automatically controls the degree of rotational wheel slip during braking by: (1) Sensing the rate of angular rotation of the wheels; (2) Transmitting signals regarding the rat
24、e of wheel angular rotation to one or more controlling devices which interpret those signals and generate responsive controlling output signals; and (3) Transmitting those controlling signals to one or more modulators which adjust brake actuating forces in response to those signals. 3.15 ABS (per EC
25、E R13) An “anti-lock braking system” is a part of a service braking system which automatically controls the degree of slip, in the direction of rotation of the wheel(s), on one or more wheels of the vehicle during braking. 3.16 ACC Active Cruise Control or Adaptive Cruise Control A system that uses
26、radar, laser or other sensors in addition to a traditional cruise-control system and ABS or ECBS to monitor traffic ahead of a vehicle, and automatically maintain a preset following interval via engine throttle, auxiliary brakes or the service braking system. ACC typically has three major functions:
27、 maintaining a set speed, detecting a vehicle in the travel lane ahead, and maintaining a predefined headway when slower vehicles ahead are detected. Also referred to as Intelligent Cruise Control. 3.17 ADB Air Disc Brake A pneumatically actuated disc brake. 3.18 Air Gap The distance between the fac
28、e of a wheel speed sensor and tone ring. 3.19 Antilock Malfunction Signal and Circuit (per FMVSS-121, S5.1.6.2) An indicator lamp, mounted in front of and in clear view of the driver, which is activated whenever there is a malfunction that affects the generation or transmission of response or contro
29、l signals in the vehicles antilock brake system. (b)(1) The lamp shall be designed to conform to the performance requirements of SAE International Recommended Practice J592 JUN92, or J592e, July 1972, Clearance, Side Marker, and Identification. 3.20 ALB Automatic Load-dependent Braking force control
30、 A system that balances the brake force between axles depending on vehicle load distribution. . 3.21 Anti-Compounding A mechanism that prevents the combined forces of spring brake and service brake from being applied to a foundation brake simultaneously. 3.22 ASR Automatic Slip Regulation. See ATC.
31、SAE J2627 Revised AUG2009 Page 5 of 13 3.23 ATC Automatic Traction Control An electronic control system, based on an ABS or ECBS system with additional software code and electro-pneumatic valving designed to automatically control engine torque levels and modulate drive-axle individual wheel-end brak
32、e pressure to a) improve vehicle mobility by utilizing otherwise unavailable tire-road traction and b)improve lateral vehicle stability by maintaining an appropriate slip level of the driven wheels (Also referred to as ASR). 3.24 ATC Deep Snow and Mud Switch A driver-operated electrical switch used
33、to request a mode of traction control operation that permits greater than usual slip before calling for a reduction in engine torque or brake application. This may enhance vehicle mobility under deep snow and mud conditions. The switch may also completely deactivate ATC as an optional traction aid.
34、3.25 Automatic Tire Diameter Compensation A software algorithm that compensates for variability in wheel speed signals caused by tire diameter differences. 3.26 Axle-Load Sensor A means for determining the load on an axle. Usually by measuring air bag pressure (air suspension systems) or by measurin
35、g suspension height (spring suspensions). 3.27 Biased Quick Release Valve A valve that delivers no pressure until a bias pressure (also referred to as hold off or crack pressure) level has been reached at the inlet. 3.28 Blink Codes A sequence of blinks of the ABS indicator lamp to communicate infor
36、mation about the ABS system, which allows a technician to troubleshoot ABS problems without special equipment. 3.29 Brake (per SAE J656) An energy conversion mechanism used to retard, stop or hold a vehicle. 3.30 Brake (per ECE R13) The part in which the forces opposing the movement of the vehicle d
37、evelop. It may be a friction brake (when the forces are generated by friction between two parts of the vehicle moving relatively to one another); an electrical brake (when the forces are generated by electro-magnetic action between two parts of the vehicle moving relatively to but not in contact wit
38、h one another); a fluid brake (when the forces are generated by the action of a fluid situated between two parts of the vehicle moving relatively to one another); or an engine brake (when the forces are derived from an artificial increase in the braking action, transmitted to the wheels, of the engi
39、ne). 3.31 Brake-by-Wire Slang term for ECBS. 3.32 Braking System Coefficient of Friction A parameter that relates the lateral or longitudinal force on a tire to normal or vertical force applied to the tire. Also, a parameter that relates the force of a brake pad or block to its clamping (normal) for
40、ce. SAE J2627 Revised AUG2009 Page 6 of 13 3.33 CAN Data Link Controller Area Network A hardware protocol licensed by Bosch for transmitting data over a multiplex data connection between multiple electronic control units on a vehicle. (SAE J1939 is an implementation of the CAN protocol). 3.34 Clear
41、Codes A system to erase historical diagnostic trouble codes from the ABS or ECBS ECU using a diagnostic switch or hand held diagnostic tool. Typically only repaired diagnostic codes may be cleared. 3.35 Controller (per ECE R13) A component designed to evaluate the data transmitted by the sensor(s) a
42、nd to transmit a signal to the modulator. 3.36 Coupling Force Control (per ECE R13) A system/function to balance automatically the braking rate of towing vehicle and trailer. 3.37 CMS Collision Mitigation System An expansion of the ACC system capable of applying the service brakes to decelerate the
43、vehicle in a collision imminent situation in an effort to reduce collision impact energy. 3.38 DBR German abbreviation for endurance brakes ie retarder, jake brake, exhaust brake. 3.39 Diagnostic Connector A receptacle in the vehicle cab for connection of SAE J1587 or SAE J1939 hand held or PC based
44、 test equipment. 3.40 Diagnostic Switch A switch used to activate diagnostic Blink Codes. 3.41 Diagnostic Trouble Code A code generated by the ECU indicating problems that may affect ABS or ECBS system functionality. 3.42 Differential Braking A term used to describe part of an ATC event where brake
45、force is applied to a spinning wheel so that drive torque will be transferred to the wheels which have more available traction. 3.43 Directly Controlled Wheel (per FMVSS-121) A wheel whose braking force is modulated according to data provided at least by its own sensor. 3.44 Driveline Retarder An en
46、ergy conversion mechanism mounted between the back of transmission and the drive axle differential used for the purpose of retarding vehicle motion. SAE J2627 Revised AUG2009 Page 7 of 13 3.45 DTC Drag Torque Control A system that reduces wheel slip due to driveline inertia drag on a driven axle by
47、increasing engine torque to overcome the inertia. Increases vehicle stability on low traction surfaces during drop throttle conditions, downshifting, or retarder braking. 3.46 EBD Electronic Brake Force Distribution (see Variable Proportioning Brake System). 3.47 EBS Electronic Brake System A term f
48、or ECBS commonly used in Europe. 3.48 ECAS Electronically Controlled Air Suspension. (A related term sometimes used in Europe is ELF). 3.49 ECBS Electronically Controlled Brake System The minimum requirement for a service brake system to be designated as an ECBS is that the service brake control is
49、done electronically. The power source (working circuit) is pneumatic or hydraulic. ECBS includes the basic functions and features of ABS. ECBS allows independent control of brake pressures on each axle. 3.50 ECBS Warning Light A red warning light that may be the same as the low air pressure warning light. This indicator is a signal to the operator that the vehicle should be sidelined as soon as is practicable. 3.5
