SAE J 4004-2008 Positioning the H-Point Design Tool Seating Reference Point and Seat Track Length《H点设计工具配置 就座参考点和座位轨道长度》.pdf
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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 theref
2、rom, 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 2008 SAE International All rights reserved. No part of this publication ma
3、y 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.orgJ4004 AUG2008 SURFACEVEHICLERECOMMENDEDPRACTICEIssued 2005-08Revised 2008-08 Superseding J4004 AUG2005 Positioning the H-Point Design ToolSeating Reference Point and Seat Track Length RATIONALEThe 2008 revision of this
5、 Recommended Practice aligns the document with current industry procedures while preserving the advantages of the new tools and methods described in SAE J4002 and SAE J4003. The new definitions and procedures allow manufacturers flexibility to change accelerator pedal shape and orientation without n
6、ecessitating changes in the Seating Reference Point (SgRP) location and simplify the communication of pedal and package requirements between manufacturers and suppliers.A new Shoe Plane and Shoe Plane Angle (SPA) replace the Pedal Plane and Pedal Plane Angle defined in the previous revision. The SPA
7、 equation is now cubic, based on an improved empirical fit to the kinematics of the SAE J4002 HPM-II and SAE J826 HPM geometry. The SPA equation is now also based on an ankle angle fixed at 87 degrees, which is a current industry practice and identical in intent to the SAE J1516 theta equation. Howe
8、ver, the new fit better characterizes the kinematics of the HPM and the H-point Design Tool (HPD).The new Ball of Foot Reference Point (BOFRP) replaces the Pedal Reference Point (PRP) in the previous version as the reference for the SgRP locator curve. The key difference is that the BOFRP need not l
9、ie on the pedal surface, giving flexibility to change accelerator pedal shape and orientation without changing SgRP. The BOFRP is now 203 mm from the Accelerator Heel Point (AHP), consistent with SAE J826, SAE J1100:2008, and vehicle manufacturers around the world. The recommended SgRP Z location fo
10、r seats with vertical adjustment was revised in response to some manufacturers increasing the range of seat height adjustments beyond the ranges used to develop this document. Depending on the amount of height adjustment provided, SgRP_Z will either be at mid-height of the H-point travel window or l
11、ower, with a maximum height of 20 mm above the full-down H-point travel path. The HPD has also been revised to include some elements of the SAE J826 2-D H-point template, based on requests from manufacturers. A 2-D profile that includes a shoulder reference point has been added to the standard form
12、of the HPD CAD tool. This document may be used with the SAE J826 design tool, provided that the flat shoe bottom defined in SAE J826 (2008) is used. SAE J4004 Revised AUG2008 - 2 -FOREWORDThis document describes how to position and posture the H-point design tool (HPD), and how to establish the seat
13、ing reference point (SgRP) and other key reference points that are used in the design and specification of both driver and passenger seat positions. Use of the HPD in conjunction with the H-point machine (HPM-II) for benchmarking vehicle occupant packages is described in SAE J4003. Prediction of whe
14、re drivers select seat positions on the seat adjuster path is important for many aspects of vehicle design related to comfort and safety. Vehicle designers use driver seat position models to determine the length and location of adjustable seat tracks to insure that drivers of varying size can comfor
15、tably reach and operate vehicle hand and foot controls.This document provides a new method for determining driver seat track length and for positioning the seat track in the vehicle package. It is based on studies and statistical models developed at the University of Michigan Transportation Research
16、 Institute. The new method for positioning driver seat tracks in the vehicle is based on H30 and two new variables, L6 and the presence or absence of a clutch pedal. The seat track length is independent of vehicle seat or package variables. It is based on accommodating with high statistical confiden
17、ce the range of statures represented by an equal number of U.S. male and female drivers. Background details of the new method are given in Appendix A. Historical information about the prior procedure is given in Appendix E. SAE J4004 will in the future fully replace SAE J1517:1990 for Class A vehicl
18、es. Until 2017 the ball-of-foot and accelerator heel point determined according to SAE J1517 may be used in lieu of the BOFRP cited in this document. However, SAE J4004 should be used to determine the seat track length and the accommodation levels for the U.S. driving population. SAE J4004 Revised A
19、UG2008 - 3 -TABLE OF CONTENTS FOREWORD 2 1. SCOPE 42. REFERENCES 52.1 Applicable Publications . 52.1.1 SAE Publications. 52.2 Related Publications . 52.2.1 SAE Publications. 53. DEFINITIONS . 63.1 SAE J1100 Definitions 63.2 SAE J4004 Definitions 73.2.1 Driver Seat Position Accommodation . 73.2.2 Dri
20、ver Seat Position Accommodation Point 74. DETERMINING THE DRIVER SEATING REFERENCE POINT AND POSITIONING THE HPD . 74.1 Overview of Design Procedures . 74.2 Driver Designated Seating Position Design Procedure 94.2.1 Determine the Initial Target Values. 94.2.2 Define Shoe Tool Location and Attitude .
21、 104.2.3 Position the SgRP Curve and Design H-point Travel Path. 134.2.4 Determine SgRP, Measure H30, Verify W20 134.2.5 Optional SPA Recalculation 144.2.6 Position HPD Cushion and Back Pan. 154.2.7 Position HPD Shoe, Thigh, and Lower Legs 155. DRIVER SEAT TRACK ACCOMMODATION FOR A U.S. DRIVER POPUL
22、ATION 155.1 Determine H-point Reference X Position 155.2 Determine Seat Track Length. 165.3 Position H-point Travel Path in Vehicle 165.3.1 Add Driver Seat Position Accommodation Points (optional). 165.3.2 Angle Seat Track in Side View 165.4 Position Seat Track in Vehicle 176. DESIGN PROCEDURES FOR
23、2ND OR 3RD ROW OUTBOARD SEATING POSITIONS. 176.1 Determine the Initial Target Values. 186.2 Establish Seat Positions . 186.2.1 Seat Position of Seat in Front . 186.2.2 Current Seat Position 186.3 Position HPD (Cushion and Back Pan Assemblies), Determine SgRP 186.4 Position Shoe Tool 186.5 Position T
24、high and Lower Leg 196.6 Short-coupled Seating 196.7 Decision Tree for Short- and Long-Couple Procedures . 206.8 Determine Dimensions 227. NOTES 227.1 Marginal Indicia. 22APPENDIX A MODEL DESCRIPTION AND APPLICATIONS FOR OTHER DRIVER POPULATIONS 23A.1 BACKGROUND 23A.2 MODEL DESCRIPTION 23A.3 TOLERAN
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