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 theref
2、rom, is the sole responsibility of the user.”SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions.Copyright 2016 SAE InternationalAll rights reserved. No part of this publi
3、cation 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.TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada)Tel: +1 724-776-4970 (out
4、side USA)Fax: 724-776-0790Email: CustomerServicesae.orgSAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedbackon this Technical Report, please visithttp:/standards.sae.org/J2318_201611SURFACE VEHICLEVEHICLE STANDARDJ2318 NOV2016Issued 2002-01Revised 2016-11Superseding J2318 NOV2
5、008Air Brake Actuator Test Performance Requirements - Truck and BusRATIONALEUpdated to be consistent with SAE J2932 (Disc Brake), aligned sections to match SAE J1469. Parking force requirements redefined to be consistent with service force requirements, from 33% to 90% of rated stroke. Added 130psig
6、 Force Output Service Chamber requirement.TABLE OF CONTENTS1. SCOPE 12. REFERENCES 23. DEFINITIONS . 24. LEAK RATE - PARKING AND SERVICE CHAMBER 25. RELEASE AND HOLD-OFF PRESSURE - PARKING CHAMBER 36. PRESSURE RESPONSE - SERVICE CHAMBER . 37. FORCE OUTPUT AND STROKE - PARKING & SERVICE CHAMBER 38. L
7、OW TEMPERATURE LEAKAGE - PARKING AND SERVICE CHAMBER 69. LOW TEMPERATURE MAXIMUM RELEASE AND HOLD-OFF PRESSURE 610. LOW TEMPERATURE FORCE OUTPUT - PARKING CHAMBER . 611. LOW TEMPERATURE OPERATIONAL TEST - SERVICE CHAMBER 612. CHAMBER VOLUME - PARKING AND SERVICE CHAMBER 713. CORROSION RESISTANCE-COM
8、BINATION, PARKING, AND SERVICE ACTUATORS. 714. MECHANICAL BACK-OFF RELEASE MECHANISM 715. ELEVATED TEMPERATURE CYCLE TEST - PARKING AND SERVICE CHAMBER 816. CYCLE TEST PARKING CHAMBER. 817. PROOF PRESSURE TEST - PARKING AND SERVICE CHAMBER 918. VIBRATION TEST. 919. NOTES 101. SCOPEThis procedure pro
9、vides test performance requirements for service, spring applied parking, and double diaphragm combination air brake actuators with respect to durability, function, and environmental performance when tested in accordance to SAE J1469.1.1 PurposeThis SAE recommended procedure provides uniform minimum
10、requirements for air brake actuators used in air brake systems for trucks, truck-tractor, bus, and trailers.SAE INTERNATIONAL J2318 NOV2016 Page 2 of 102. REFERENCES2.1 Applicable DocumentsThe following publications form a part of the specification to the extent specified herein. Unless otherwise in
11、dicated, the latest issue of SAE publications shall apply.2.1.1 SAE PublicationsAvailable from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or +1 724-776-4970 (outside USA), www.sae.org.SAE J1469 Air Brake Actuator Test Procedure, Tr
12、uck-Tractor, Bus, and Trailers2.1.2 U. S. Government PublicationsAvailable from the Document Automation and Production Service (DAPS), Building 4/D, 700 Robbins Avenue, Philadelphia, PA 19111-5094, Tel: 215-697-6257, http:/assist.daps.dla.mil/quicksearch/.FMVSS 121 Air Brake Systems, 49 CFR Parts 57
13、1.1213. DEFINITIONSRefer to SAE J1469, Section 3.4. LEAK RATE - PARKING AND SERVICE CHAMBERFor allowable leak rate, refer to Table 1.4.1 Ref: SAE J1469 Section 4.Table 1 - Leak rate - parking and service chambersChamberTestedMaximum AllowableLeakage Rate(Calculated)Alternate Test ProcedureMaximum Al
14、lowablePressure ChangeApplicableSAE J1469 TestProcedureParking Chamber 23 cc/min.(1.40 in3/min.)4.1.210.34 kPa(1.5 psig)4.1.3Service Chamber 23 cc/min.(1.40 in3/min.)4.2.110.34 kPa(1.5 psig)4.2.3SAE INTERNATIONAL J2318 NOV2016 Page 3 of 105. RELEASE AND HOLD-OFF PRESSURE - PARKING CHAMBER5.1 Ref: SA
15、E J1469 Test Procedure 5.5.2 Hold-off pressure (pressure decreasing) is typically measured at 5 mm (0.20 inch) stroke of the parking chamber from the actuator zero stroke position. A maximum target hold-off pressure of 483 kPa (70 psi) will in most applications, ensure the brakes will not drag. This
16、 requirement may vary depending on a vehicle air brake system, which may allow a higher hold-off pressure or require a lower hold-off pressure. A low hold-off pressure is preferred to ensure brakes do not drag.6. PRESSURE RESPONSE - SERVICE CHAMBER6.1 Ref: SAE J1469 Test Procedure 6.6.2 The minimum
17、pressure response is to be measured and recorded and made available upon customer request.7. FORCE OUTPUT AND STROKE - PARKING & SERVICE CHAMBER7.1 Ref: SAE J1469 Test Procedure 7.1.7.1.1 Parking force output requirements for the most common standard and long-stroke diaphragm actuated parking chambe
18、rs are given in Table 2 for reference purposes only. Forces given are the minimum and maximum allowed. Parking chamber force output is measured for a complete (tandem) actuator after the power spring has been fully caged1 for 24 hours. Test procedures other than SAE J1469 may require the spring be f
19、ully caged for 56 days or some other time period. The forces given in Table 2 are only applicable to test procedure SAE J1469.7.1.2 There are various levels of parking forces for the same type (size) parking chambers, only the most common forces are given in Table 2. It is therefore incumbent upon O
20、EM vehicle manufacturers to assure each vehicle meets grade holding or draw bar holding requirements, as well as, required stopping distances in accordance to FMVSS 121 for the specified parking chamber.Table 2 - Parking chamber force output(1)1 Cage power spring restrained at its most compressed po
21、sition within the parking chamber.SAE INTERNATIONAL J2318 NOV2016 Page 4 of 107.2 Force Output and StrokeService Chamber7.2.1 Ref: SAE J1469 Test Procedure 7.2.7.2.2 Service chamber force output versus stroke at applied air pressures are given in the following tables:Table 3 Service Chamber Force Ou
22、tputTable 4 Rotochamber Force Output Service at StrokeData given is for the most common type (size) clamp band/sealed design service chambers and service side of tandem (combination) spring brake actuators. The forces charted are for double diaphragm actuators, as well as for Rotochambers - service.
23、NOTE: The intent of these tables is to provide industry minimum service application forces for the purpose of engineering calculations. There may however, be some variations to these values due to manufacturers design differences.Table 3 - Service chamber force output stroke(1)SAE INTERNATIONAL J231
24、8 NOV2016 Page 5 of 10Table 4 - Rotochamber force output - service strokeSAE INTERNATIONAL J2318 NOV2016 Page 6 of 108. LOW TEMPERATURE LEAKAGE - PARKING AND SERVICE CHAMBERFor allowable leakage, refer to Table 5.8.1 Ref: SAE J1469 Test Procedure 8.8.2 Allowable leakage is shown in Table 5 for test
25、performed at -40C/F. Artic leakage testing at -54C 1C (-65F 2F) is an optional test and requirements shall be agreed to with the vehicle manufacture or customer.Table 5 - Low temperature leakage - parking and service chamberChamberTestedMaximum AllowableLeakage Rate(Calculated)Alternate Test Procedu
26、reMaximum AllowablePressure ChangeApplicableSAE J1469 TestProcedureParking Chamber 30 cc/min(1.83 in3/min)9.1.213.79 kPa(2.0 psig)9.1.3Service Chamber 30 cc/min(1.83 in3/min)9.2.213.79 kPa (2.0 psig)9.2.39. LOW TEMPERATURE MAXIMUM RELEASE AND HOLD-OFF PRESSURE9.1 Ref: SAE J1469 test procedure 9.Same
27、 as Section 5.10. LOW TEMPERATURE FORCE OUTPUT - PARKING CHAMBER10.1 Ref: SAE J1469 Test Procedure 10.Same as 7.1.11. LOW TEMPERATURE OPERATIONAL TEST - SERVICE CHAMBER11.1 Ref: SAE J1469 Test Procedure 11.11.2 The service chamber diaphragm shall return to within 6.4 mm (0.25 inch) of zero stroke wi
28、thin 60 seconds without assistance.11.3 Upon disassembly there shall be no visual damage or cracking to the diaphragm.11.4 Ref: SAE J1469 Test Procedure 11.2.Same as Section 6.SAE INTERNATIONAL J2318 NOV2016 Page 7 of 1012. CHAMBER VOLUME - PARKING AND SERVICE CHAMBER12.1 Ref: SAE J1469 Test Procedu
29、re 12.12.1.1 Parking ChamberPer FMVSS121 air reservoir sizes are calculated from the service chamber volumes, therefore it is not required to provide recommended parking chamber volumes.12.2 Service ChamberService chamber volumes should be in compliance with FMVSS 121 5.1.2.1 for trucks and buses an
30、d 5.2.2.1 for trailers which references Table V “Brake Chamber Rated Volumes”.13. CORROSION RESISTANCE-COMBINATION, PARKING, AND SERVICE ACTUATORS13.1 Ref: SAE J1469 Test Procedure 13.13.2 After units have been air dried, they shall meet the following minimum requirements:13.2.1 Output Force for Par
31、king Chamber of a Combination ActuatorSame as Section 7.1.13.2.2 Release Pressure for a Parking Chamber of a Combination ActuatorSame as Section 5.13.2.3 Leakage - Parking ChamberSame as Section 813.2.4 Leakage - Service ChamberSame as Section 8.13.2.5 Mechanical Back-Off Release Mechanism for Sprin
32、g Brake Actuators with Integral Release MechanismsSame as Section 14.2.14. MECHANICAL BACK-OFF RELEASE MECHANISM14.1 Ref: SAE J1469 Test Procedure 14.14.2 The running torque shall not be greater than 67.8 Nm (50 lb-ft) to manually cage (compress) the power spring for all 5 applications.14.3 No evide
33、nce of galling of the threads on any internal or external threaded parts is permitted.SAE INTERNATIONAL J2318 NOV2016 Page 8 of 1015. ELEVATED TEMPERATURE CYCLE TEST - PARKING AND SERVICE CHAMBER15.1 Ref: SAE J1469 Test Procedure 15.15.1.1 Parking Chamber15.1.2 LeakageSame as Section 8.15.2 Service
34、Chamber15.2.1 LeakageSame as Section 8.15.3 There shall be no component failures.16. CYCLE TEST PARKING CHAMBER16.1 Cycle Test Parking Chamber16.1.1 Ref: SAE J1469 Test Procedure 16.1.16.1.2 Test unit must complete a minimum of 200000 cycles.16.1.3 LeakageSame as Section 8.16.1.4 Force OutputFor ref
35、erence and reporting only.16.1.5 Maximum Release and Hold-Off PressureSame as Section 5.16.1.6 There shall be no component failure.16.2 CYCLE TEST SERVICE CHAMBER16.2.1 Ref: SAE J1469 Test Procedure 16.2.16.2.2 Test unit must complete a minimum of 1000000 cycles.16.2.3 LeakageSame as Section 8.16.2.
36、4 There shall be no component failures.SAE INTERNATIONAL J2318 NOV2016 Page 9 of 1017. PROOF PRESSURE TEST - PARKING AND SERVICE CHAMBER17.1 Ref: SAE J1469 Test Procedure 17.17.1.1 Parking Chamber17.1.2 LeakageSame as Section 8.17.1.3 Unit shall have no structural failure.17.2 Service Chamber17.2.1
37、LeakageSame as Section 8.17.2.2 Unit shall have no structural failure.18. VIBRATION TEST18.1 Ref: SAE J1469 Test Procedure 18.18.2 Unless otherwise specified by the equipment manufacturer, after applying a minimum of 8.5G input acceleration at resonant frequency, the resonant frequency should not ch
38、ange by more than 10% during a 1 million cycle test.18.3 Mounting Nut Torque18.3.1 Mounting nut torque to be measured by tightening the nut. The recorded torque shall be within the limits of theinitial recommended application.18.4 Leakage Test18.4.1 Leakage Test - Parking ChamberSame as Section 8.18
39、.4.2 Leakage Test - Service ChamberSame as Section 8.18.5 Performance Test18.5.1 Force Output and Stroke - Parking ChamberSame as 7.1, where applicable.18.6 Structural18.6.1 No structural failures detected by a 10% output frequency change will be acceptable.SAE INTERNATIONAL J2318 NOV2016 Page 10 of
40、 1019. NOTES19.1 Revision IndicatorA change bar (I) located in the left margin is for the convenience of the user in locating areas where technical revisions, not editorial changes, have been made to the previous issue of this document. An (R) symbol to the left of the document title indicates a com
41、plete revision of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only.PREPARED BY THE SAE TRUCK AND BUS BRAKE ACTUATOR COMMITTEEOF THE SAE TRUCK AND BUS BRAKE AND STABILITY CONTROL STEERING COMMITTEE
