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 revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2012 SAE International All rights reserved. No part of this p
3、ublication 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: +1 724-776-497
4、0 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/J2348_201212 SURFACE VEHICLE RECOMMENDED PRACTICE J2348 DEC2012 Issued 1997-03 Re
5、vised 2012-12 Superseding J2348 MAR2002 Electric Windshield Washer Switch - Trucks, Buses, and Multipurpose Vehicles RATIONALE The typo is an obvious error since a temperature cannot be 165 degrees C and 74 degrees C at the same time. The conversion was correct but the annotation should have been F
6、rather than C. 1. SCOPE This SAE Recommended Practice establishes for trucks, buses, and multipurpose passenger vehicles with GVW of 4500 kg (10 000 lb) or greater: a. Minimum performance requirements for the switch for activating electric or electro-pneumatic windshield washer systems. b. Uniform t
7、est procedures that include those tests that can be conducted on uniform test equipment by commercially available laboratory facilities. The test procedures and minimum performance requirements, outlined in this document, are based on currently available engineering data. It is the intent that all p
8、ortions of the document will be periodically reviewed and revised as additional data regarding windshield washing system performance is developed. 2. REFERENCES 2.1 Applicable Document The following publications form a part of this specification to the extent specified herein. Unless otherwise indic
9、ated, 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: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. SAE J2349 Electric Windshield Wiper Switch - Truck
10、s, Buses, and Multipurpose Vehicles SAE J2348 Revised DEC2012 Page 2 of 3 2.2 Related Publications The following publications are provided for information purposes only and are not a required part of this SAE Technical Report. 2.2.1 SAE Publications Available from SAE International, 400 Commonwealth
11、 Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or 724-776-4970 (outside USA), www.sae.org. SAE J198 Windshield Wiper System - Trucks, Buses, and Multipurpose Vehicles SAE J234 Electric Windshield Washer Switch - Passenger Car SAE J258 Circuit Breakers SAE J553 Circuit B
12、reakers SAE J1944 Windshield Washer Systems - Trucks, Buses, and Multipurpose Vehicles 2.2.2 ISO Publication Available from American National Standards Institute, 25 West 43rd Street, New York, NY 10036-8002, Tel: 212-642-4900, www.ansi.org. ISO 3469 Windscreen Washing System - Test Method 3. DEFINI
13、TION 3.1 ELECTRIC WINDSHIELD WASHER SWITCH That part of an electric or electro-pneumatic windshield washer system by which the operator of a vehicle causes the windshield washers to function. 4. TEMPERATURE TEST 4.1 To insure basic function, the switch shall be manually cycled for 10 cycles at desig
14、n electrical load at 24 C 5.5 C (75 F 10 F); 74, +0, 2.8 C (165, +0, 5 F); and 32, +2.8, 0 C (25, +5, 0 F) after a 1 h exposure at each of these temperatures. The switch shall be electrically and mechanically operable during each of these cycles. 4.2 This same switch shall be used for the endurance
15、tests described in Section 5. 5. ENDURANCE TEST SETUP 5.1 The switch shall be set up to operate its design electrical load. 5.2 The test shall be set up to operate the switch for the prescribed number of completed cycles. One complete cycle shall consist of sequencing through each position (with dwe
16、ll in each position) and return without dwell in intermediate positions to the initial position. The test equipment shall be so arranged as to provide the following mechanical time requirements: a. Travel Time - 0.1 to 0.5 s (time from one position to the next) b. Dwell Time - 1.0 to 2.0 s (time in
17、each position) SAE J2348 Revised DEC2012 Page 3 of 3 5.3 During the test, the switch shall be operated at 12.8 V dc for a 12 V system, or 25.6 V dc for a 24 V system. These voltages shall be measured at the input termination on the switch. The power supply shall not generate any adverse transients n
18、ot present in motor vehicles and shall comply with the following specification: a. Output Current - Capable of supplying the continuous current of the design electrical load. b. Regulation: 1. Dynamic - The output voltage at the supply shall not deviate more than 1.0 V from zero to maximum load (inc
19、luding inrush current), and should recover 63% of its maximum excursion within 100 ms. 2. Static - The output voltage at the supply shall not deviate more than 2% with changes in static load from zero to maximum (not including inrush current), and means shall be provided to compensate for static inp
20、ut line voltage variations. 3. Ripple Voltage - Maximum 300 mV peak-to-peak. 6. ENDURANCE REQUIREMENTS 6.1 The switch shall be capable of satisfactorily operating for 10 000 complete cycles at a temperature of 24 C 5.5 C (75 F 10 F). 6.2 The average voltage drop from the input terminal(s) to the cor
21、responding output terminal(s) shall be measured before and after the endurance test and shall not exceed 0.30 V (the average of three consecutive readings) at design load. If wiring is an integral part of the switch, the voltage drop measurement shall be made including 76 mm (3 in) of wire on each s
22、ide of the switch; otherwise, measurement shall be made at switch terminals. 7. COMBINATION WINDSHIELD WIPER AND WASHER SWITCH The same combination switch shall be used for the test of each function. If the washer and wiper functions are mechanically coordinated, the functions shall be tested simult
23、aneously. The washer switch shall meet the requirements of this document. The wiper switch shall meet the requirements of SAE J2349. 8. NOTES 8.1 Marginal Indicia A change bar (l) located in the left margin is for the convenience of the user in locating areas where technical revisions, not editorial
24、 changes, have been made to the previous issue of this document. An (R) symbol to the left of the document title indicates a complete 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 WINDSHIELD WIPERS AND CLIMATE CONTROL COMMITTEE
