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    SAE J 1144-2000 Towed Vehicle Drivetrain Test Procedure Passenger Cars Vans and Light-Duty Trucks《拖车驱动机车试验程序 轿车、铁路货车和卡车》.pdf

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    SAE J 1144-2000 Towed Vehicle Drivetrain Test Procedure Passenger Cars Vans and Light-Duty Trucks《拖车驱动机车试验程序 轿车、铁路货车和卡车》.pdf

    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.TO PLACE A DOCUMENT ORDER; (724) 776-4970 FAX: (724) 776-0790SAE WEB ADDRESS http:/www.s

    3、ae.orgCopyright 2000 Society of Automotive Engineers, Inc.All rights reserved. Printed in U.S.A.SURFACEVEHICLE400 Commonwealth Drive, Warrendale, PA 15096-0001RECOMMENDEDPRACTICESubmitted for recognition as an American National StandardJ1144REV.SEP2000Issued 1976-07Revised 2000-09Superseding J1144 F

    4、EB1994Towed Vehicle Drivetrain Test ProcedurePassenger Cars, Vans, and Light-duty TrucksForewordThis Document has also changed to comply with the new SAE Technical Standards Board Format.Definitions changed to Section 3. All other section numbers have changed accordingly.TABLE OF CONTENTS1. Scope .

    5、12. References . 22.1 Applicable Publications 23. Definitions. 24. Test Equipment 24.1 Tow Truck. 24.2 Vehicle Ballast 25. Towed Vehicle Drivetrain Test ProcedurePassenger Cars, Vans, and Light-Duty Trucks . 25.1 Towed Vehicle Preparation 25.2 Vehicle Test Procedure 46. Notes 56.1 Marginal Indicia 5

    6、6.2 Key Words 51. ScopeThis SAE Recommended Practice provides a means for evaluating the drivetrain of the passengercar, van, or light-duty truck being towed under a variety of road conditions. The towing equipment used isexplained in SAE J1142.NOTEFor the purpose of this document, the drivetrain re

    7、fers to the combination of a specific transmission(make, model, size, type), a specific differential assembly (make, model, size, type), and a specificdriveline, if required.SAE J1144 Revised SEP2000-2-2. References2.1 Applicable PublicationsThe following publications form a part of the specificatio

    8、n to the extent specifiedherein. Unless otherwise indicated, the latest version of SAE publications shall apply.2.1.1 SAE PUBLICATIONSAvailable from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.SAE J1142Towability Design Criteria and Equipment UsePassenger Cars, Vans, and Light-DutyTrucksS

    9、AE J1143Towed Vehicle/Tow Equipment Attachment Test ProcedurePassenger Cars, Vans, andLight-Duty Trucks3. DefinitionsSee SAE J1142, paragraph 3.4. Test Equipment4.1 Tow Truck4.1.1 TOW SLING EQUIPMENTPASSENGER CARS, VANS, AND LIGHT-DUTY TRUCKS BEING TOWED WITH TOW SLINGEQUIPMENTThe tow vehicle used s

    10、hould conform to criteria set in SAE J1142, 4.2.1 through 4.2.3.1.4.1.2 WHEEL-LIFT EQUIPMENTPASSENGER CARS, VANS, AND LIGHT-DUTY TRUCKS BEING TOWED WITH WHEEL-LIFTEQUIPMENTThe tow vehicle used should conform to criteria set in SAE J1142, 4.3.1 through 4.3.3.4.1.3 Additional towing equipment, as nece

    11、ssary, to safely tow the vehicle. See SAE J1142, 4.1 through 4.1.6.4.1.4 Other equipment and information as required. See SAE J1142, Section 6.4.2 Vehicle Ballast5. Towed Vehicle Drivetrain Test ProcedurePassenger Cars, Vans, and Light-Duty Trucks5.1 Towed Vehicle Preparation5.1.1 The vehicle shall

    12、be the model with the heaviest maximum curb weight for which the drivetrain combinationto be tested is used. A ballast may be used, if required.5.1.2 The vehicle shall be equipped with a combination of tires and differential ratio, which gives the highest N/V(engine rpm per vehicle km/h (mph) ratio

    13、as recommended by the vehicle manufacturer for which thedrivetrain combination to be tested is used).5.1.3 The fluid levels in transmission and differential shall meet the minimum specifications for normal vehicleoperation.5.1.4 The ride height shall be within the vehicle manufacturers specification

    14、s prior to testing.5.1.5 TEST VEHICLE LOADS5.1.5.1 The passenger cars shall be loaded to the vehicle manufacturers recommended cargo weight rating.5.1.5.2 The vans and light-duty trucks shall be loaded as specified by the vehicle manufacturer.5.1.6 Record final vehicle weights (See Figure 1).SAE J11

    15、44 Revised SEP2000-3-FIGURE 1TOWED VEHICLE DRIVETRAIN TESTSAE J1144 Revised SEP2000-4-5.1.7 DRIVETRAIN COMBINATION BREAK-INDrive the test vehicles for 80 km (50 miles) at 88 km/h (55 mph)constant speed, with the transmission selector in Drive position for automatic transmissions and Highposition for

    16、 manual transmission. After each 8 km (5 miles), make a moderate stop and subsequentmoderate acceleration back to 88 km/h (55 mph).5.1.8 The drivetrain shall meet acceptable noise levels after break-in.5.2 Vehicle Test Procedure5.2.1 Park the test vehicle on level ground for 8 h minimum for oil drai

    17、n down.5.2.2 For front-wheel-drive and four-wheel-drive vehicles, set the front wheels in a straight-ahead position andsecure the steering wheel according to SAE J1142, 4.1.5.5.2.3 With the tow truck and vehicle on level ground, attach the towing equipment to the vehicle following thevehicle manufac

    18、turers recommended procedure for the towing of vehicles on their drive wheels.5.2.3.1 For tow sling equipment, raise the lifted wheels to 102 mm (4 in) from the bottom of the tire above theground.5.2.3.2 For wheel-lift equipment, position retaining/L arms as recommended by the equipment manufacturer

    19、 andraise the front wheels to a minimum of 255 mm (10 in) from the bottom of the tire above ground.5.2.4 Place the ignition switch and the transmission selector in an applicable position for towing and release theparking brake.5.2.5 TOWING TEST PROCEDURE (REAR-WHEEL-DRIVE VEHICLES)NOTEFor recording

    20、purposes, use the towed vehicle drivetrain test data sheet or equivalent (see Figure1).5.2.5.1 Tow the vehicle at 88 km/h (55 mph) for 80 km (50 miles). Refer to SAE J1143, 5.2.12.5.2.5.2 Detach the vehicle from the tow truck and drive the vehicle to evaluate the vehicle drivetrain for normaloperati

    21、on.5.2.5.3 Remove the drivetrain combination from the vehicle, disassemble, and inspect for damage that couldcause a premature failure and record.5.2.5.4 Install drivetrain.5.2.5.5 Drive the vehicle to determine if the vehicle is operating at normal functionality.5.2.6 TOWING TEST PROCEDURE (FRONT-W

    22、HEEL-DRIVE VEHICLE)NOTEFor recording purposes, use the towed vehicle drivetrain test data sheet or equivalent (See Figure1).5.2.6.1 Perform 5.2.5.1 through 5.2.5.5.5.2.7 TOWING TEST PROCEDURE (FOUR-WHEEL-DRIVE VEHICLES)NOTEFor recording purposes, use the towed vehicle drivetrain test data sheet or e

    23、quivalent (See Figure1).SAE J1144 Revised SEP2000-5-5.2.7.1 Depending on which wheels (front or rear) will be on the ground, place the transmission and transfer caseselectors in the vehicle manufacturers recommended position for towing.5.2.7.2 Tow on rear drive wheels per 5.2.5.1.5.2.7.3 Repeat 5.2.

    24、5.2 through 5.2.5.5.5.2.7.4 Place the transmission and transfer case selectors in the vehicle manufacturers recommended position fortowing and attach the towing equipment to the vehicle following the manufacturers recommendedprocedure.5.2.7.5 Tow on front drive wheels per 5.2.5.1.5.2.7.6 Repeat 5.2.

    25、5.2 through 5.2.5.5.6. Notes6.1 Marginal IndiciaThe change bar (I) 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

    26、 of the report.6.2 Key WordsAutomobile, car, pickup truck, minivan, towability.PREPARED BY THE SAE TOWABILITY COMMITTEESAE J1144 Revised SEP2000RationaleNot applicable.Relationship of SAE Standard to ISO StandardNot applicable.ApplicationThis SAE Recommended Practice provides a means for evaluating

    27、the drivetrain of thepassenger car, van, or light-duty truck being towed under a variety of road conditions. The towingequipment used is explained in SAE J1142.NOTE 1For the purpose of this document, the drivetrain refers to the combination of a specifictransmission (make, model, size, type), a spec

    28、ific differential assembly (make, model, size,type), and a specific driveline, if required.NOTE 2The definitions as included in Section 3 of SAE J1142 will be used in conjunction with thisdocument.Reference SectionSAE J1142Towability Design Criteria and Equipment UsePassenger Cars, Vans, and Light-DutyTrucksSAE J1143Towed Vehicle/Tow Equipment Attachment Test ProcedurePassenger Cars, Vans, andLight-Duty TrucksDeveloped by the SAE Towability Committee


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