SAE J1469-2019

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Carl 2024-09-06 50 768.81KB 21 页 15星币
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suggestions.
Copyright © 2019 SAE International
All rights reserved. No part of this publication may 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.
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Technical Report, please visit
http://standards.sae.org/J1469_201903
SURFACE VEHICLE
RECOMMENDED PRACTICE
J1469™
MAR2019
Issued 1988-06
Revised 2019-03
Superseding J1469 FEB2017
(R) Air Brake Actuator Test Procedure, Truck-Tractor, Bus, and Trailers
RATIONALE
This revision, after a request from a document user, adds clarification with regard to Section 13 and the stroke-identifing
device called out in SAE J2899. The requirements of 13.1.2.2.d, 13.2.2.3, and 13.3.2.3.s will apply only if the subject actuator
is equipped with such a stroke-identifing mark.
1. SCOPE
This SAE Recommended Practice provides procedures and methods for testing service, spring applied parking, and
combination brake actuators with respect to durability, function, and environmental performance. A minimum of six test units
designated A, B, C, D, E, and F are to be used to perform all tests per 1.1 and 1.2.
1.1 Test Procedures
a. Leak Rate - Parking and Service Chambers (see Section 4)
b. Maximum Release and Hold-Off Pressure - Parking Chamber (see Section 5)
c. Minimum Pressure Response - Service Chambers (see Section 6)
d. Force Output and Stroke - Parking and Service Chambers (see Section 7)
e. Low-Temperature Leakage (Arctic Option Included) - Parking and Service Chambers (see Section 8)
f. Low-Temperature Maximum Release and Hold-Off Pressure (see Section 9)
g. Low-Temperature Force Output - Parking Chamber (see Section 10)
h. Low-Temperature Operational Test - Service Chamber (see Section 11)
i. Chamber Volume - Service Chambers (see Section 12)
j. Corrosion Resistance - Parking and Service Chamber (see Section 13)
k. Mechanical Back-Off Release Mechanism (see Section 14)
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SAE INTERNATIONAL J1469™ MAR2019 Page 2 of 21
l. Elevated Temperature Cycle Test - Parking and Service Chambers (see Section 15)
m. Cycle Test - Parking and Service Chambers (see Section 16)
n. Proof Pressure Test - Parking and Service Chambers (see Section 17)
o. Vibration Test (see Section 18)
1.2 Test Sequence Chart
The test sequence as charted in the “Test Sequence Chart” shall be mandatory except where indicated as optional
(see Figure 1).
Figure 1 - Test sequence chart
A B C D E F A B C D E F A B C D E F
Park 4.1 XXXXXXXXXXXX
Service 4.2 XXXXXX XXXXXX
5X X
6O O
Park 7.1 XXXXXXXXXXXX
Service 7.2 XXXXXX XXXXXX
Park 8.1 X X
Service 8.2 X X
9O O
Low Temp. Force Output Park 10 O O
11 X X
Park 12.1 O O
Service 12.2 X X
13 XXX
14 X X X X
Park 15.1 X X
Service 15.2 X X
Park 16.1 X X X X X X
Service 16.2 X X X X X X
Park 17.1 X X
Service 17.2 X X
18 XXX
Cycle Test
Elevated Temp. Test
Low Temp. Leakage
1. Items marked with "X" are mandatory.
2. Items marked with "O" are optional.
Chamber Volume
TESTS FOR PARKING CHAMBERS
ONL Y
TEST UNIT
DESIGNATION
TESTS FOR COMBINA TIONS
TEST UNIT
DESIGNATION
Force Output and Stroke
Test
Procedure
Section
NO.
TESTS FOR SERVICE CHAMBERS
ONL Y
TEST UNIT
DESIGNATION
Leakage Rate
Proof Pressure
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SAE INTERNATIONAL J1469™ MAR2019 Page 3 of 21
1.3 Purpose
This document provides uniform procedures and methods for laboratory testing of brake actuators used in air brake systems.
2. REFERENCES
2.1 Applicable Document
The following publications form a part of this specification to the extent specified herein. Unless otherwise indicated, the
latest issue of SAE publications shall apply.
2.1.1 ASTM Publications
Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959,
Tel: 610-832-9585, www.astm.org
ASTM B117 Method of Salt Spray (Fog) Testing
3. DEFINITIONS
3.1 HOLD-OFF PRESSURE
A decrease of parking chamber air pressure for parking brake application (extend power spring).
3.2 RELEASE PRESSURE
An increase of parking chamber air pressure to release the parking brake (compress power spring).
3.3 PARKING CHAMBER APPLY
Extend power spring.
3.4 PARKING CHAMBER RELEASE
Compress power spring.
3.5 FULL STROKE
Maximum stroke of a unit.
3.6 RATED STROKE
Minimum design stroke of a unit.
3.7 SERVICE BRAKE ACTUATOR
Air-activated actuator for applying the foundation brake.
3.8 PARKING BRAKE ACTUATOR
Mechanically applied actuator for restraining the vehicle.
3.9 COMBINATION BRAKE ACTUATOR
Combined service and parking section actuator.
Downloaded from SAE International by Univ of Toronto, Tuesday, November 24, 2020
摘要：

SAE J1469-2019是由国际自动机工程师学会（SAE International）发布的最新版本标准规范，主要针对汽车与重型车辆系统中使用的密封环设计与性能测试要求进行了详细规定。该标准旨在统一密封件的材料选择、尺寸公差、安装规范及耐久性评估方法，以确保在高温、高压及复杂油液环境下仍能维持可靠的密封效果。SAE J1469-2019更新了原有的测试流程与判据，纳入了更严格的环境模拟条件和失效分析标准，适用于发动机、变速箱及液压系统等关键部件的密封设计。通过遵循这一标准，工程师能够有效降低

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作者：Carl 分类：国外协会 价格：15星币 属性：21 页 大小：768.81KB 格式：PDF 时间：2024-09-06

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