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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 therefr
2、om, 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. QUESTIONS REGARDING THIS DOCUMENT: (724) 772-8512 FAX: (724) 776-0243 TO PLACE A DOCU
3、MENT ORDER; (724) 776-4970 FAX: (724) 776-0790 SAE WEB ADDRESS http:/www.sae.org Copyright 1997 Society of Automotive Engineers, Inc. All rights reserved.Printed in U.S.A. SURFACE VEHICLE 400 Commonwealth Drive, Warrendale, PA 15096-0001 RECOMMENDED PRACTICE Submitted for recognition as an American
4、National Standard J1578 REV. JUL1997 Issued1989-06 Revised1997-07 Superseding J1578 JUN89 (R) MOTORCYCLE SIDE STAND RETRACTION TEST PROCEDURE ForewordThis document has been changed to comply with the new SAE Technical Standards Board format. Section 2 is now References which makes all the other sect
5、ion numbers change. Also 7.8 has been revised. 1.Scope 1.1This test procedure provides a standard method for evaluating the side stand retraction performance of a side stand/motorcycle combination. 1.2This test procedure applies to any two-wheeled motorcycle without a sidecar, equipped with a side s
6、tand, and intended for highway use. (See SAE J213.) 1.3This SAE Recommended Practice is intended as a guide toward standard practice but may be subject to frequent change to keep pace with experience and technical advances. This should be kept in mind when considering the use of this document. 2.Ref
7、erences 2.1Applicable PublicationsThe following publication forms a part of this specification to the extent specified herein. Unless otherwise specified, the latest issue of SAE publications shall apply. 2.1.1SAE PUBLICATIONSAvailable from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001. SAE
8、 J213DefinitionsMotorcycles SAE J1846Characterizing a Test Surface for Motorcycle Side Stand Retraction Performance Testing 2.2Related PublicationThe following publication is provided for information purposes only and is not a required part of this document. 2.2.1SAE PUBLICATIONAvailable from SAE, 4
9、00 Commonwealth Drive, Warrendale, PA 15096-0001. SAE J1579Motorcycle Side Stand Retraction Performance Requirements SAE J1578 Revised JUL1997 -2- 3.Definitions 3.1Side StandA device attached to the motorcycle that provides support, in conjunction with the motorcycles two tires, for unattended parki
10、ng of the motorcycle. Three-point ground support for unattended parking is provided by leaning the motorcycle toward the side stand until the side stand and the two tires are in contact with the ground. 3.2Deployed PositionThe position of a side stand in which it provides support, in conjunction wit
11、h the two tires, for unattended parking of a motorcycle. 3.3Stowed PositionThe position of a side stand for driving a motorcycle, from which it shall neither interfere with the operators control nor return unaided to a deployed position. 3.4RetractFor a side stand to move from a deployed position to
12、 a stowed position. 3.5Longitudinal Plane of SymmetryA vertical plane as defined in SAE J213. 4.Test Vehicle 4.1Suspension SettingThe suspension components shall be set to the motorcycle manufacturers recommended damping and preload settings for the vehicle load and speed under the conditions of the
13、 test. If recommendations for suspension adjustment are not provided by the motorcycle manufacturer, suspension settings for damping and preload shall each be at the midpoint of their adjustment range, or if the adjustment increments include no midpoint setting, at the next setting below the midpoin
14、t of the range. 4.2Tire PressureThe tire pressure shall be set to the motorcycle manufacturers recommended pressure for the vehicle load and speed under the conditions of the test. 4.3Fuel LevelThe fuel tank shall be filled to at least 75% of the nominal fuel tank capacity. 4.4Fluid LevelsThe lubric
15、ants, coolants, and other fluids shall be at the normal full levels. 5.Test Operator 5.1The test operator shall be skilled at motorcycle operation, and shall be experienced with the machine under test and this test procedure before conducting any test runs. 5.2For solo test conditions, the combined
16、mass of the test operator, protective equipment, instrumentation, and other items added to the motorcycle for testing shall be 75 to 90 kg (165 to 198 lb). 5.2.1Protective equipment for the operator shall include helmet, eye protection, abrasion resistant jacket and trousers, gloves, and boots. 6.Te
17、st Site 6.1The test site on which the test course is laid out shall be a level area. Space shall be provided for acceleration, deceleration, and out of course excursion of the test vehicle. 6.2Test Course 6.2.1The test course consists of a target test path and 1.5 m (4 ft, 11 in) lane width centered
18、 upon the target test path. SAE J1578 Revised JUL1997 -3- 6.2.2The target test path shall be laid out as shown in Figure 1 according to the coordinates specified in Table 1. The target test path may be marked by a coating such as chalk. The test course perimeter as shown in Figure 1 may be identifie
19、d by a coating such as chalk or tape, or by small objects such as flexible cones which would not destabilize a motorcycle passing over them. FIGURE 1TEST COURSE LAYOUT SAE J1578 Revised JUL1997 -4- TABLE 1APPROACH, TEST PATH, AND STOPPING ZONE COORDINATES Point Y m Y ft Y in X m X ft X inComment 100
20、00Beginning of optional 100 mApproach Path 2266-3/44.58150-5/16 34131-1/28.522711-7/16 46198-1/411.99394-1/16 58262-15/1615.11496-7/8 610329-11/1617.955810-11/16 712394-7/1620.55675-1/16 814451-13/1622.94753-1/8 916525-15/1625.16826-9/16 1018590-5/827.22893-5/8 1120657-3/829.15957-5/8 1222722-1/830.
21、951016-1/2 1324788-7/832.631070-5/8 1426853-5/834.201122-7/16 15289110-3/835.681170-3/4 1630985-1/837.071217-7/16 173210411-13/1638.3712510-5/8 18341116-9/1639.5812910-1/4 19361181-5/1640.731337-9/16 20381248-1/1641.791371-1/4 21401312-13/1642.791404-5/8 22421399-9/1643.751436-7/16 23441444-1/444.58
22、1463-1/8 244615011-045.3814810-5/8 25481575-3/446.121513-3/4Beginning of 30 mApproach Path 26501640-1/246.801536-1/2 27521707-1/447.421556-15/16 28541772-047.991575-3/8 29561838-3/448.501591-7/16 30581903-7/1648.961607-9/16 316019610-3/1649.3616111-5/16 32622034-15/1649.711631-1/16 336420911-5/850.0
23、11640-7/8 34662166-7/1650.2616410-3/4 35682231-3/1650.461656-5/8 36702297-7/850.621660-15/16Starting PointBeginning of Roll Toward Side Stand 37722362-5/850.721664-7/8 38742429-3/850.771666-13/16 397825510-7/850.791667-5/80 degreeLean Angle 40822690-5/1650.811668-3/8 41832723-3/450.831669-3/16 42842
24、757-1/1650.8616610-3/8 438527810-7/1650.9016611-15/16 44862821-13/1650.971672-11/16 45872855-3/1651.041675-7/16 46882888-9/1651.141679-3/8 478929111-15/1651.251681-11/16 48902953-5/1651.391680-5/8 49912986-11/1651.561691-15/16 509230110-1/1651.751699-3/8 51933051-7/1651.981706-7/16 52943084-13/1652.
25、241714-11/16 53953118-1/852.541724-1/245 km/hTermination Point SAE J1578 Revised JUL1997 -5- 6.2.3The target test path is defined by the points given in Table 1 and laid out as shown in Figure 1. The origin (0,0) of the (Y,X) coordinate system is the beginning of the 100 m approach path. 6.2.3.1100
26、m Approach PathPoints 1 through 36. 6.2.3.230 km/h Test PathPoints 36 through 63. 6.2.3.345 km/h Test PathPoints 36 through 53. 6.2.4For simplicity, Figure 1 shows the target test path and the test course as laid out for a test motorcycle with a side stand on the left side. The target test path and
27、test course for a test motorcycle with a side stand on the right side shall be a mirror image of Figure 1. 6.2.5The exit zones provided allow deceleration at 1/4 g from the test speeds. The side boundaries of the exit zones are the tangent to the test path at the respective termination point and a l
28、ine 20 degrees to the inside of the tangent. 6.3Test Surface 6.3.1The test surface is the 1.5 m (4 ft, 11 in) lane width between points 36 and 63 of Table 1. The test surface shall consist of one or more coats of a coal-tar water emulsion, without aggregate, applied uniformly over a base surface of
29、bituminous asphalt concrete with a carpet sled ratio (CSR) less than or equal to 0.80 before coating, measured according to SAE J1846. The minimum number of coats required to achieve the CSR specified in 6.3.3.1 shall be used. 6.3.2The test surface shall be dry and free of surface discontinuities wh
30、ich could engage side stands during tests and influence retraction. This requirement includes indentations or gouges created during previous tests. 549631411-1/252.881735-7/8 55973182-7/853.271749-1/4 56983216-1/253.711762-9/16 57993249-5/854.2117710-1/4 581003281-054.771798-5/16 591013314-3/855.421
31、811-1/4 601023347-3/456.151842-5/8 6110333711-1/857.001870-1/8 621043412-1/258.001903-7/16 631053445-7/859.191942-5/1630 km/hTermination Point 64125.344112-5/862.202040-13/1645 km/hExit Zone Boundaries 65120.213944-13/1672.002362-5/845 km/hExit Zone Boundaries 66113.553726-1/270.472312-3/830 km/hExi
32、t Zone Boundaries 67109.173582-1/1672.712386-9/1630 km/hExit Zone Boundaries TABLE 1APPROACH, TEST PATH, AND STOPPING ZONE COORDINATES (CONTINUED) Point Y m Y ft Y in X m X ft X inComment SAE J1578 Revised JUL1997 -6- 6.3.3The carpet sled ratio (CSR) of the test surface shall be measured according t
33、o SAE J1846, on 10 surface specimens of the test course at the locations given as follows: a.Test specimen Location Point from Table 1: 36 39 42 45 48 51 54 57 60 63 6.3.3.1The average CSR value for the 10 measurements shall be not less than 0.50 and not more than 0.55. No individual CSR value shall
34、 be less than 0.45 or more than 0.60. 6.3.3.2The specified CSR measurement points provide a consistent procedure for judging the suitability of test surface characteristics. Any specimen of the test surface should produce a CSR value between the highest and lowest values produced at the 10 specified
35、 locations. 6.3.3.3If 30 days or more have elapsed since measurement of the test surface CSR, it shall be verified per 6.3.3 before conducting further side stand retraction tests. Visual inspection of surface condition in accordance with 6.3.2 shall be made also. Alternatives for surfaces no longer
36、meeting specifications are: coating a new base surface, stripping and reapplying the coating, or applying a new coating over the existing coating. No single alternative is preferred; the individual constraints of each situation must be considered. 6.3.4SURFACE TEMPERATUREThe surface temperature of t
37、he test course shall be within the range of 10 to 38 C (50 to 100 F) during the test runs. 7.Procedure 7.1Each test run shall include the required 30 m approach path, and the applicable test course and exit zone for the 30 km/h or 45 km/h test speeds. The 100 m approach path may be used if desired.
38、7.2For each test motorcycle with a maximum speed of 50 km/h (31.1 mph) or more, two test runs shall be made at each test speed of 30 and 45 km/h (18.6 and 28.0 mph). For each test motorcycle with a maximum speed of less than 50 km/h (31.1 mph), two test runs shall be made at a test speed of 30 km/h
39、(18.6 mph). Data for all runs shall be recorded. 7.3For each test run, the motorcycle shall enter the test course at the test speed with the side stand in the deployed position. 7.4For a test run to be valid, the motorcycle shall complete the course with an average speed within 2.0 km/h (1.2 mph) of
40、 the nominal test speed. The average speed shall be determined by measuring the elapsed time between the starting and termination points for the applicable test course, or entrance and exit speeds at the same staring and termination points, respectively. SAE J1578 Revised JUL1997 -7- 7.5The operator
41、 shall attempt to keep his center of gravity aligned with the motorcycles longitudinal plane of symmetry. 7.6The operator shall attempt to keep the motorcycle upon the target test path and within the exit zone. The operator shall keep the motorcycle within 0.15 m (6 in) of the target test path until
42、 the motorcycle side stand contacts the test course surface. 7.7Documentation 7.7.1The condition of the side stand and related components shall be reported. 7.7.2For each test run, the data to be recorded are: test course surface temperature, entry and exit speed for the test course, or alternativel
43、y, the elapsed time upon the test course; whether the tire contact patches remained within 0.15 m (6 in) of the target test path until the side stand contacted the test course surface; whether the motorcycles tire contact patches remained within the test course; whether the side stand contacted the
44、test course surface; if so, whether the side stand retracted by the termination point of the test course; and upon exit whether the motorcycle remained in control in the test course. 7.8For test motorcycles with a side stand on each side, or the right side only, each side stand shall be tested by th
45、e procedure outlined. However, the right side stand test course will be a “mirror” image of that shown in Figure 1. 7.9The test runs shall be made with one test operator as described in Section 5. Other load conditions may also be tested, but these shall be reported in the results as non-SAE J1578 t
46、est conditions. 7.10 During the test run, no portion of the motorcycle or operator except the tires or side stand shall touch the test course surface. 7.11 The operator shall maintain contact with the seat, handgrips, and footrests, and shall attempt to maintain control of the motorcycle. 8.Notes 8.
47、1Marginal IndiciaThe change bar (l) located in the left margin is for the convenience of the user in locating areas where technical revisions have been made to the previous issue of the report. An (R) symbol to the left of the document title indicates a complete revision of the report. PREPARED BY T
48、HE SAE PARKING STAND TASK FORCE OF THE SAE MOTORCYCLE COMMITTEE SAE J1578 Revised JUL1997 RationaleThe changes to this document include: a.Updating the document to comply with the SAE Technical Standards Board format. Section 2 is now References and all other section numbers have changed. b.Section
49、6.2.2 Figure 1 was changed: 30 m Approach Path was added to the left side and Exit Zone (Reference) was added to the right side. c.Section 7.7.2, third line down after 0.15 m (6 in), “or” was changed to “of”. d.Section 7.8 has been revised. Relationship of SAE Standard to ISO StandardNot applicable. ApplicationThis test procedure provides a standard method for evaluating the side stand retraction performance of a side stand/motorcycle combination. This test procedure applies to any two-wheeled motorcycle without a sidecar, equipped with a side s