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 reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. Copyright 2007 SAE International All rights reserved. No part of this publication m
3、ay 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: 724-776-4970 (outside USA)
4、 Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org J2208 REV. OCT2007 SURFACE VEHICLE RECOMMENDED PRACTICE Issued 1993-06 Revised 2007-10 Superseding J2208 JUN1993 Park Standard for Automatic Transmissions RATIONALE This document has been updated for improved clarifi
5、cation and also to reflect new reference standards. 1. SCOPE To provide a Recommended Practice for validating the function and integrity of an automatic transmission park mechanism with its associated control system and environment. 1.1 Purpose To define the requirements for parking mechanisms of au
6、tomatic transmissions through evaluation in designated usages. 1.2 Vehicle Application Encompasses all vehicle usages, up to maximum GVW, with all available production released axle ratios and tire sizes. 2. REFERENCES 2.1 Applicable Publications The following publications form a part of this specif
7、ication to the extent specified herein. The latest issue of SAE publications shall apply. 2.1.1 SAE Publications Available from SAE, 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 HS J447 Prevention of Corr
8、osion of Motor Vehicle Body and Chassis Components SAE J915 Manual Control SequenceAutomatic Transmissions SAE J1083 Unauthorized Starting or Movement of Machines SAE J1145 Emissions Terminology and Nomenclature Copyright SAE International Provided by IHS under license with SAENot for ResaleNo repro
9、duction or networking permitted without license from IHS-,-,-SAE J2208 Revised OCT2007 - 2 - 2.1.2 FMVSS and CMVSS Publications Available from the Superintendent of Documents, U.S. Government Printing Office, Mail Stop: SSOP, Washington, DC 20402-9320. FMVSS 102 Transmission Shift Lever Sequence, St
10、arter Interlock, and Transmission Braking Effect FMVSS 105 Hydraulic and Electric Brake Systems FMVSS 114 Theft Protection CMVSS 105 Hydraulic and Electric Brake Systems 3. DEFINITIONS 3.1 Control System Those systems which, when activated, impart motion to the mechanism or any of its working tools
11、and include the hardware and logic (if applicable), shift lever/mechanism (operator actuator device), and such devices being external to the transmission. 3.2 Ratchet The activity of the park pawl and gear which occurs with the transmission in Park detent and the pawl unable to engage the park gear
12、due to the gears rotating above a given velocity. 3.3 Pull Out The operator-initiated action of disengaging the parking pawl from the parking gear. 3.4 Gross Vehicle Weight (GVW) The manufacturers gross weight rating, consisting of the curb weight plus payload, without any trailer. 4. TESTS 4.1 FMVS
13、S 105, CMVSS 105 Mandatory requirement for all portions relating to automatic transmission park mechanism (including impact barrier test). 4.2 FMVSS 114 Rollback testing requirements testing. 4.3 Ratchet test is conducted: a. To assure ratchet above a target speed. b. To assure engagement below a ta
14、rget vehicle speed. c. As an “abuse“ test. d. As indicated in Table 1. Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SAE J2208 Revised OCT2007 - 3 - TABLE 1 - RATCHET TEST, CURRENT INDUSTRY PRACTIC
15、E Test Track Level Ratchet to Engagement Cycles 50 to 100 cycles Vehicle Speed 8 to 70 km/h Engagement Speed (Target) up to 6 km/h 4.4 Pull out effort test is conducted: a. To assure pull out capable. b. To assure engagement at or below targeted engagement speed. c. As indicated in Table 2. TABLE 2
16、- PULL OUT EFFORT TEST, CURRENT INDUSTRY PRACTICE Test Practice Test Track 30 to 32% Grade uphill and downhill Vehicle Application Max GVW Number of Cycles 200 total 4.5 Other tests are conducted as determined by the manufacturer to satisfy unique or specific conditions. 5. NOTES 5.1 Marginal Indici
17、a The 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 THE SAE AUTOMATIC TRANSMISSION AND TRANSAXLE STANDARDS COMMITTEE Copyright SAE International Provided by IHS under license with SAENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
