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
25、CE 25A.4 PROCEDURE . 26SAE J4004 Revised AUG2008 - 4 -A.4.1 Define Distributions. 26A.4.2 Compute Percent Accommodation . 26A.4.3 Select Cutoff with Desired Accommodation Level 27A.4.4 Incorporate Tolerance. 27APPENDIX B HPD SPECIFICATION AND TOLERANCES 28B.1 TOLERANCES 28B.2 REFERENCE POSTURE FOR S
26、PECIFICATIONS 28B.3 SHOE TOOL DIMENSIONS . 29B.4 LENGTHS . 29B.5 WIDTHS 30B.6 HEIGHTS 30B.7 RADII. 31B.8 BACK PAN LINKAGE MECHANISM 31B.9 SUPPORT POINTS 31B.10 DIVOT POINT LOCATIONS . 32B.11 OPTIONAL FORM OF HPD 33B.12 FILE FORMAT 34B.12.1 Datum Lines 34APPENDIX C USE OF THE SAE J826 BOTTOM OF SHOE
27、36APPENDIX D DESIGNING ACCELERATOR PEDAL SIDE VIEW ORIENTATION . 37D.1 BACKGROUND 37D.2 MODEL DESCRIPTION 37APPENDIX E BACKGROUND ON THE SAE J1517 MODEL FOR DRIVER-SELECTED SEAT POSITION 38E.1 SAE J1517 METHOD . 38E.2 KEY DIFFERENCES BETWEEN SAE J1517 AND SAE J4004 DRIVER SELECTEDSEAT POSITION MODEL
28、S 391. SCOPE This SAE Recommended Practice describes how to position and posture the H-point design tool (HPD) described in Appendix B, and how to establish the seating reference point (SgRP), design H-point travel path, and other key reference points that are used in the design and specification of
29、 both driver and passenger seat positions.This practice also provides a method for determining the length of the seat track for a driver seat that adjusts fore/aft. The seat track length is based on a desired level of driver accommodation, assuming a U.S. population containing an equal number of mal
30、e and female drivers. The procedure can be used to establish driver seat track accommodation for new vehicle designs or to evaluate accommodation in existing vehicles.A general method for determining driver seat track length for any driver population (male and female stature distribution) at any sel
31、ected accommodation percentile and gender mix is given in Appendix A.Application of this document is limited to Class A Vehicles (Passenger Cars, Multipurpose Passenger Vehicles, and Light Trucks) as defined in SAE J1100. SAE J4004 Revised AUG2008 - 5 -2. REFERENCES 2.1 Applicable Publications This
32、document contains provisions which reference the following documents. At the time of publication, the indicated editions of these references were valid. Since all publications are subject to revision or deletion, users of this document are encouraged to refer to the most recent published editions of
33、 these referenced documents. Information obtained using the following publications is needed for application of the procedures described in this Practice. 2.1.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Can
34、ada) or 724-776-4970 (outside USA), www.sae.org.SAE J4002 H-Point Machine (HPM-II) Specifications and Procedure for H-Point DeterminationAuditing Vehicle SeatsSAE J1100 Motor Vehicle Dimensions 2.2 Related Publications The following publications were discussed or used to develop the seating accommod
35、ation procedures and are not required for application of this document. 2.2.1 SAE Publications Available from SAE International, 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 J826 Devices for Use in Definin
36、g and Measuring Vehicle Seating Accommodation SAE J1516 Accommodation Tool Reference Point SAE J1517 Driver Selected Seat Position SAE J4003 H-Point Machine (HPM-II)Procedure for H-Point DeterminationBenchmarking Vehicle Seats 2.2.2 Philippart, N.L., Roe, R.W., Arnold, A.J., and Kuechenmeister, T.J.
37、 (1984). Driver selected seat position model.SAE Technical Paper 840508. SAE International, Warrendale, PA. 2.2.3 Flannagan, C.C., Schneider, L.W., and Manary, M.A. (1996). Development of a Seating Accommodation Model. SAE Technical Paper 960479. SAE International, Warrendale, PA. 2.2.4 Abraham, S.,
38、 Johnson, C.L., and Najjar, M.F. (1979). Weight and height of adults 18-74 years of age. Vital and Health Statistics. Series 11, No. 211. 2.2.5 U. S. National Heath and Nutrition Examination Survey (NHANES III): Height for males and females 20 years and older: United States, 1988-1994. 2.2.6 Flannag
39、an, C. C., Schneider, L.W., and Manary, M.A., and Reed, M. P. (1998). An Improved seating Accommodation Model with Application to Different User Populations. SAE Technical Paper 980651. SAE International, Warrendale, PA. SAE J4004 Revised AUG2008 - 6 -3. DEFINITIONS 3.1 SAE J1100 Definitions Acceler
40、ator Heel Point (AHP) Ball of Foot (BOF) Ball of Foot Reference Point (BOFRP) Floor Reference Point (FRP) Heel of Shoe (HOS) H-pointH-Point Travel PathPedal Contact Point (PCP) Seating Reference Point (SgRP) A27 Cushion Angle A47 Shoe Plane Angle (SPA) H30 Seat HeightL6 BOFRP to Steering Wheel Cente
41、r PW86 AHP to BOFRP Lateral Offset TH21 Rearmost Lowest to Rearmost Highest H-Point Height Driver BOFRP and AHP are reference points in the shoe plane that are coincident with the BOF and HOS points on the HPD shoe, when the HPD shoe is on the accelerator pedal. BOF and BOFRP are not coincident when
42、 there is an interference condition (4.2.2.1). When BOF and HOS are on the floor, HOS defines the FRP. The terms “shoe tool” and “shoe” are both used to describe the HPD shoe. (See Figures 1, 5 and 10.) FIGURE 1 - SEATING PACKAGE DESCRIPTION SHOWING PACKAGE FACTORS USED TO CALCULATE DRIVER SEAT POSI
43、TIONS SAE J4004 Revised AUG2008 - 7 -3.2 SAE J4004 Definitions 3.2.1 Driver Seat Position Accommodation Percent of a 50/50 male/female driver population whose preferred fore/aft seat track position is within the seat track travel path. 3.2.2 Driver Seat Position Accommodation Point Point on design H
44、-point travel path that provides a specified level of driver seat position accommodation for a given driver population and vehicle package. 4. DETERMINING THE DRIVER SEATING REFERENCE POINT AND POSITIONING THE HPD This procedure is used to position the H-point design tool (HPD, Figure 2) in the corr
45、ect location for the driver, and to establish the driver Seating Reference Point (SgRP-Front), Ball of Foot Reference Point (BOFRP), Accelerator Heel Point (AHP) and driver Shoe Plane Angle (SPA). Specifications and tolerances for the HPD are given in Appendix B. Note that shoe plane and SPA replace
46、s pedal plane and pedal plane angle terminology used in SAE J1516. Design procedures in this document can be used with both the HPM and HPM-II CAD tools. The SAE J826 HPM has a non-articulated torso that does not provide a measure of Lumbar Support Prominence (LSP). The SAE J826 manikin shoe has a s
47、tandard bottom-of-shoe profile with a heel pocket, and an optional flat shoe bottom without the heel pocket. Procedures in this document use the flat bottom-of-shoe profile. 4.1 Overview of Design Procedures The HPD is used during design to establish key reference points within the vehicle for each
48、occupant seating position, including the SgRP and heel points (AHP for the driver and FRPs for passengers). These points are then used to configure and measure many aspects of the vehicle interior compartment. SAE J4004 Revised AUG2008 - 8 -FIGURE 2 - H-POINT DESIGN TOOL (HPD) - ELEMENTS ARE COMMON
49、WITH H-POINT MACHINE (HPM-II) EXCEPT FOR PARTS OF THE 2-D PROFILE The SgRP is a specific and unique H-point location for each designated seating position. (Although adjustable seats will have many H-point locations within their H-point travel path, only one H-point location is defined as the SgRP for any designated occupant seating position.) The most critical SgRP is the one defined for the driver (SgRP-Front). It is used to p
