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 2013 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/J2474_201305 SURFACE VEHICLE STANDARD J2474 MAY2013 Issued 2000-08 Revised 2013-0
5、5 Superseding J2474 OCT2006 Self Propelled Sweepers and Scrubbers Battery Run-Time RATIONALE The document has been revised to update the referenced documents and removed references to canceled documents. 1. SCOPE This SAE standard applies to all electric battery-powered machines that fall within the
6、 scope of SAE J2130-2. 1.1 Purpose To define a uniform method of determining the time a battery-powered machine can continue operating normally with a given set of batteries. 2. REFERENCES 2.1 Applicable Documents The following publication form a part of the specification to the extent specified her
7、ein. Unless otherwise indicated, the latest issue of SAE publications shall apply. 2.1.1 SAE Publication 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 J2130-2 Identificati
8、on of Self-Propelled Sweepers and Cleaning Equipment Part 2 - Machines with a Gross Vehicle Mass Up to 5000 kg SAE J2474 Revised MAY2013 Page 2 of 4 3. DEFINITIONS 3.1 BATTERY A h RATING The capacity of a battery to supply a specified current for a specified time before reaching the cut-off terminal
9、 voltage. 3.2 CUT-OFF TERMINAL VOLTAGE The battery manufacturers recommended voltage cut-off point beyond which the battery shall not be used because damage to it and or the equipment it is powering can occur. 3.3 RUN-TIME The time between the start-of-test and the end-of-test. 3.4 START-OF-TEST The
10、 point during a test when the key switch is first placed in the on position, after following applicable manufacturers starting procedures. 3.5 END-OF-TEST The point in time during a test when the cut-off terminal voltage has been reached. 3.6 CLEANING MODE All brushes and brooms shall be in contact
11、with the floor and in operation. All brush and broom adjustments shall be in the floating or average load position as disclosed in the manufacturers operating instructions. All optional equipment shall be off unless otherwise declared in the test results. The cleaning solution flow rate shall be set
12、 to the middle or average position. All dust control systems and water pick-up systems shall be operating. The machine shall be driven at a speed mid-way between the fastest and slowest cleaning speeds. The resulting operating speed is to be listed in the result Section 7. 3.7 TRANSPORT MODE All mot
13、ors and systems except for the propulsion drive motor shall be shut-off. The machine should be traveling at the maximum transport speed. 3.8 CLEANING SOLUTION Water without any additional chemicals. 3.9 RECYCLING MACHINES Machines that can filter and reuse the recovered cleaning solution. These mach
14、ines are defined in SAE J2130-2. SAE J2474 Revised MAY2013 Page 3 of 4 4. TEST CONDITIONS AND INSTRUMENTATION COMMON TO ALL TESTS 4.1 Condition of Machine The machine shall have been operated for at least one h before a test. The machine shall be prepared for use as defined by the manufacturer. 4.2
15、Condition of the Battery The battery shall have been conditioned by being discharged and charged at least ten times but no more than one hundred times. Prior to the test the battery shall be fully charged. 4.3 Environmental Conditions Battery charge and run-time test shall be conducted within a temp
16、erature range of 15 to 27 C. 5. RUN-TIME TEST FOR SWEEPERS 5.1 The surface for cleaning shall consist of a level clean smooth concrete surface. A weight shall be secured in the hopper. This weight shall be equivalent to the mass of sand needed to fill half of the heaped capacity of the hopper. The s
17、weeper shall be run for one h in the cleaning mode followed by five minutes in the transport mode after which the machine shall be brought to rest and the hopper cycled through a dump cycle. This cleaning-transport-dump cycle shall be repeated to discharge the battery until the battery has reached t
18、he cut-off terminal voltage. 6. RUN-TIME TEST FOR SCRUBBERS 6.1 Non-Recycling Machines The surface for cleaning shall consist of a level clean smooth concrete surface. The scrubber is to be operated in the cleaning mode until the solution tank is empty. The machine is then stopped for ten minutes wh
19、ile the solution tank is filled and the recovery tank is emptied. This cleaning-drain-refill cycle should be repeated to discharge the battery until the battery has reached the cut-off terminal voltage. 6.2 Recycling Machines The surface for cleaning shall consist of a level clean smooth concrete su
20、rface. The scrubber is to be operated in the cleaning mode with the recycling system on for two h. The machine is then stopped for ten minutes while the solution tank is filled and the recovery tank is emptied. This cleaning-drain-refill cycle should be repeated to discharge the battery until the ba
21、ttery has reached the cut-off terminal voltage. 7. REPORTING METHOD OF TEST RESULTS 7.1 The following information shall be declared in the test results; a. Run-time in hours. b. Model name or number. c. Ampere-Hour rating of batteries used during the test. d. Which options were operating during the
22、test. e. The number of solution refill cycles for a wet floor scrubber or the number of dump cycles for a floor sweeper. SAE J2474 Revised MAY2013 Page 4 of7.2 The battery run-time test results may be declared in the following format (see Figure 1). FIGURE 1 - FORMAT OF TEST RESULTS 8. NOTES 8.1 Mar
23、ginal 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 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 MTC2, SWEEPER, CLEANER, AND MACHINERY COMMITTEE
