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 entirelyvoluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefro
2、m, 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 InternationalAll rights reserved. No part of this publication may be
3、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)Fax: 724-
4、776-0790Email: CustomerServicesae.orgSAE WEB ADDRESS: http:/www.sae.orgSURFACEVEHICLERECOMMENDEDPRACTICEJ1444REAF.JAN2009Issued 1983-12Reaffirmed 2009-01Superseding J1444 AUG2003Procedure for Evaluating Transient Response of Small Engine Driven Generator SetsThis document is similar to ISO 8528 part
5、 2.1. ScopeThe scope of this SAE Recommended Practice is to provide a uniform practice for the testing of smallengine powered alternating current generator sets. This document is limited to reciprocating piston engines ofless than 14.9 kW (20 BHP).2. References2.1 Applicable PublicationsThe followin
6、g publications form a part of this specification to the extent specifiedherein. Unless otherwise indicated, the latest issue of SAE publications shall apply.2.1.1 SAE PUBLICATIONSAvailable from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.SAE J1349Engine Power Test CodeSpark Ignition and D
7、iesel3. Test Set-UpThe engine and generator set shall be assembled as a complete unit and connected to a 100%resistive load bank with a maximum of 5% light bulb load. The engine fuel and oil shall be consistent with therecommendations of the engine manufacturer. The type of fuel used shall be record
8、ed on the test log. Thelubricating oil shall be identified in the test log.4. InstrumentsThe principal instruments for measuring the performance of an engine generator set are: arecording frequency meter, a volt meter, and either an ammeter or watt meter, or both. All electrical metersshould be labo
9、ratory quality RMS reading instruments with accuracy within 0.75% of full scale value.5. Engine Run-InIf the engine is new, it must be run-in and stabilized according to the engine manufacturersrecommendation prior to the test run.6. Correction FactorSAE J1349 contain instructions for instrumentatio
10、n and calculations for the ambientcondition correction factor (see 7.2). The engine manufacturer will specify which of the documents should bereferred to for each specific engine.SAE J1444 Reaffirmed JAN2009-2-7. Governor Performance Test7.1 StabilizationStart and operate the generator set and allow
11、 the set to stabilize at rated load, rated voltage,and rated frequency. During this period, operate the recording frequency meter at a chart speed of not lessthan 152 mm/h and record all instrument readings including thermal instrumentation at maximum intervals of10 minutes. The load, voltage, prime
12、 speed control (governor), and the speed and droop portions of thecontrol may be adjusted at this time. Record adjustments to load, voltage, or frequency controls on the chart atthe time of adjustment. The engine generator stabilization starts after the last adjustment and is consideredstabilized wh
13、en run continuously for a minimum of 1/2 hour at rated load.7.2 After 20 minutes of the stabilization period has elapsed, the correction factor parameters will be measured andrecorded on the data sheet Figure 1. The correction factor can then be calculated per SAE J1349 section 9.1.The generator loa
14、d will then be adjusted from rated load to corrected rated load. This corrected rated load andfractions of it will then prevail for the remainder of the test.(Eq. 1)7.3 TestThe recording meter chart speed shall be not less than 2.54 mm/s (6 in/min) during this period.After the generator set is stabi
15、lized, operate the set at each of the load conditions listed as follows in thesequence indicated. Running time at each load condition shall be the recovery time plus at least 10 s.The loading sequence is:1. Corrected Rated Load2. No Load3. Corrected Rated Load4. No Load5. 3/4 Corrected Rated Load6.
16、No Load7. 3/4 Corrected Rated Load8. No Load9. 1/2 Corrected Rated Load10. No Load11. 1/2 Corrected Rated Load12. No Load13. 1/4 Corrected Rated Load14. No Load15. 1/4 Corrected Rated Load16. No Load17. Corrected Rated Load18. No Load19. 1/4 Corrected Rated Load20. 1/2 Corrected Rated Load21. 3/4 Co
17、rrected Rated Load22. Corrected Rated Load23. 3/4 Corrected Rated Load24. 1/2 Corrected Rated Load25. 1/4 Corrected Rated Load26. No LoadCorrected Rated LoadRated LoadCorrection Factor=SAE J1444 Reaffirmed JAN2009-3-8. Data Reduction8.1 Prepare the recording instrument chart according to Figures 1 a
18、nd 2. Record all 26 steps in the loadingsequence on the data sheet, Figure 1.FIGURE 1FREQUENCY REGULATION FORM EXAMPLESAE J1444 Reaffirmed JAN2009-4-FIGURE 2DIAGRAM ILLUSTRATING DEFINITION OF TERMS9. Prescribed Standards(See Table 1.)TABLE 1PRESCRIBED STANDARDSGovernorPerformanceClass“A“GovernorPerf
19、ormanceClass“B“A-Steady-State Speed Regulation Droop 3 Hz 4 HzB1-Recovery Time, Increasing Load 4 s 8 sB2-Recovery Time, Decreasing Load 4 s 8 sC-Overshoot 3 Hz 5 HzD-Undershoot 3 Hz 5 HzF-Allowable Steady-State Speed Band 0.6 Hz 0.8 HzSee Figure 2 for definition of terms.SAE J1444 Reaffirmed JAN200
20、9-5-10. Notes10.1 Marginal IndiciaThe change bar (l) located in the left margin is for the convenience of the user in locatingareas where technical revisions have been made to the previous issue of the report. An (R) symbol to the leftof the document title indicates a complete revision of the report
21、.PREPARED BY THE SAE SMALL ENGINE AND POWERED EQUIPMENT COMMITTEESAE J1444 Reaffirmed JAN2009RationaleThe changes made address errors and provide clarification.Relationship of SAE Standard to ISO StandardThis document is similar to ISO 8528 part 2.ApplicationThe scope of this SAE Recommended Practic
22、e is to provide a uniform practice for the testing ofsmall powered alternating current generator sets. This document is limited to reciprocating pistonengines of less than 14.9 kW (20 BHP).Reference SectionSAE J1349Engine Power Test CodeSpark Ignition and DieselDeveloped by the SAE Small Engine and Powered Equipment Standards Committee
