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.orgJ4003 OCT2008 SURFACEVEHICLERECOMMENDEDPRACTICEIssued 2005-08Revised 2008-10 Superseding J4003 AUG2005 H-Point Machine (HPM-II)Procedure for H-Point DeterminationBenchmarking Vehicle Seats RATIONALEThe 2008 revision of
5、 this Practice relates to revisions in SAE J4004 (2008) that change the way foot and pedal reference points are established. The PRP is replaced with the BOFRP which is now a point on the shoe when the shoe is in contact with the accelerator pedal. The AHP to BOF distance was changed from 200 mm to
6、203 mm for better agreement with the previous SAE J826 and SAE J1100:2008. NOTE: Some key differences from the previous version of SAE J4003 are: Use of the SAE 95th SgRP equation with an 87 degree driver ankle angle is recommended. When H30-1 is known, it potentially reduces the number of iterative
7、 calculations that may be required to complete the Benchmarking procedure. Even though manufacturers are encouraged to report the driver seat height (H30), a procedure for determining H30 is now provided. When applied to seats with vertical adjustment (H21) of 40 mm or greater, H30 (and the SgRP) is
8、 established at 20 mm directly above the full down H-point travel path in order to make consistent comparisons of seating packages across vehicles. For vertical adjustment less than 40 mm, the SgRP should be established on the SgRP curve at mid-vertical H-point travel height. This document should yi
9、eld similar results to those from the SAE J826 (2008) design tool, provided that the flat shoe defined in SAE J826 is used. FOREWORDThe tools and procedures for H-point determination given in this standard are based on the SAE H-Point Machine (HPM-II), which is described in SAE J4002. Compared to th
10、e H-point machine described in SAE J826, the changes made to HPM-II have resulted in improved repeatability, greater ease of use, and additional features and measurement capabilities. All efforts were made to achieve these improvements while minimizing their impact on the location of reference point
11、s and measurements. H-point devices are used for the design, audit, and benchmarking of seats. SAE J4002 describes the use of the HPM-II in auditing vehicle seats and other interior compartment dimensions. SAE J4003 describes the use of the HPM-II in benchmarking. Audits are conducted by regulatory
12、agencies and OEMs to assess how closely the vehicle is manufactured to its design intent. Although serving different purposes, auditing and benchmarking procedures are very similar. The most significant difference between them is that audits use actual design intent values to set up the vehicle and
13、position the seat, whereas benchmarking is used to discover the design intent values for competitor vehicles.SAE J4004 describes the use of the H-Point Design tool (HPD) for establishing key vehicle interior reference points used in designing vehicle interior compartments. The HPD is a simplified CA
14、D representation of the HPM. It replaces the 2-D H-point template. The HPD is often used in CAD in conjunction with the physical installation of the HPM during the auditing and benchmarking process. SAE J4003 Revised OCT2008 - 2 -TABLE OF CONTENTS FOREWORD 1 INTRODUCTION. 3 1. SCOPE 32. REFERENCES 4
15、2.1 Applicable Publications . 42.1.1 SAE Publications. 43. DEFINITIONS . 54. HPM BENCHMARKINGOVERVIEW AND PREPARATIONS 54.1 Use of the Physical Tool (HPM) and the CAD Tool (HPD). 54.1.1 Use of HPM. 54.1.2 Use of HPD in CAD. 64.2 Prepare the Property for HPM Installation 64.2.1 Temperature 64.2.2 Lev
16、eling. 64.2.3 Grid Reference 74.2.4 Accelerator Pedal 74.2.5 Seat Break-in 74.2.6 Seat Recovery. 74.2.7 Muslin Cloth 74.2.8 Seat Attitude and Location 75. BENCHMARKING THE DRIVER SEAT . 85.1 Prepare the Physical Property 85.2 Digitize Interior Components. 85.2.1 Seat Travel Path . 95.2.2 Other Inter
17、ior Features 95.3 Establish BOFRP, AHP, PCP and Shoe Plane 95.3.1 Install the Shoe Fixture . 105.3.2 Install the Shoe Tool . 115.3.3 Record Pedal Reference Points . 125.4 Install HPM Cushion and Back Pan Assembly . 135.4.1 Install the Cushion Pan . 135.4.2 Install the Back Pan 145.4.3 Install the He
18、ad Room Fixture (optional) 155.4.4 Set Initial Torso Angle. 165.4.5 Level the HPM. 165.5 Load the HPM . 165.5.1 Load the Cushion Pan 175.5.2 Load the Back Pan 175.5.3 Soak Time . 175.6 Digitize HPM Points 175.6.1 H-point. 175.6.2 Cushion Angle, Torso Angle, LSP 175.7 Calculate SgRP. 185.7.1 Translat
19、e Seat Travel to H-Point Travel Path . 185.7.2 SgRP for Seats with No Fore/Aft Adjustment . 185.7.3 SgRP for Seats with Fore/Aft Adjustment. 185.8 Reposition Seat to SgRP 195.9 Install Leg Segments (optional) 205.10 Record Measurements 205.11 Remove the HPM 21SAE J4003 Revised OCT2008 - 3 -6. BENCHM
20、ARKING 2ND OR SUCCEEDING ROWS, OUTBOARD PASSENGER POSITIONS 216.1 Prepare the Physical Property 216.2 Position Seats . 216.3 Install the Shoe Tool . 226.3.1 Interference at the Ankle Circumference 226.3.2 Interference at the Front of the Shoe with Short-Coupled Seating. 236.4 Install and Load Cushio
21、n Pan, Back Pan, and Head Room Fixture. 236.5 Install Leg Segments (optional) 236.5.1 Short-Coupled Seating 246.5.2 Long-Coupled Seating 256.6 Record Measurements 256.6.1 Digitize HPM Points 256.6.2 Floor Reference Points . 256.7 Remove the HPM 277. NOTES 277.1 Marginal Indicia. 27APPENDIX A (INFORM
22、ATIVE) CAD PROCEDURES USING HPD IN BENCHMARKING . 28A.1 OVERVIEW OF CAD PROCEDURES . 28A.2 DRIVER SEAT POSITION 29A.2.1 ESTABLISH SHOE PLANE, SHOE PLANE ANGLE (SPA), BOFRP, AND AHP 29A.2.2 TRANSLATE SEAT TRAVEL TO H-POINT TRAVEL PATH 30A.2.3 DETERMINE SGRP FOR ADJUSTABLE SEATS 30A.2.4 POSITION HPD A
23、T SGRP . 30A.2.5 POSITION HPD SHOE, THIGH AND LOWER LEG. 31A.2.6 RECORD MEASUREMENTS. 31A.3 PROCEDURE FOR 2ND OR SUCCEEDING ROW OUTBOARD SEATING POSITIONS . 31A.3.1 ESTABLISH SEAT POSITIONS . 31A.3.2 POSITION THE HPD CUSHION AND BACK PAN ASSEMBLIES IN TEST SEAT . 31A.3.3 POSITION SHOE TOOL, THIGH AN
24、D LOWER LEG 31A.3.4 RECORD MEASUREMENTS. 32APPENDIX B (INFORMATIVE) SUMMARY OF BENCHMARKING PROCEDURES 33APPENDIX C (INFORMATIVE) SUMMARY OF BENCHMARKING MEASUREMENTS . 35BIBLIOGRAPHY . 38 INTRODUCTIONH-point devices are used (1) during vehicle design and development to establish interior reference
25、points and dimensions for occupant packaging, (2) to validate (audit) the location of these key reference points and dimensions on physical properties, and (3) to measure competitive vehicles for benchmarking. The procedures employed for each usage vary somewhat. This document describes the use of t
26、he HPM-II for benchmarking.H-point devices are also used for designing, auditing, and benchmarking seats independent of the vehicle. However, in these instances, the reference points and dimensions are defined relative to the seat structure and/or surface, rather than the vehicles interior. The proc
27、edures for positioning the H-point devices in seats do not require the use of the shoe tool or leg segments.For convenience and simplicity, many terms associated with H-point devices use human body parts in their name. However, they should not be construed as measures that indicate occupant accommod
28、ation, human capabilities, or comfort. H-point devices do not represent the size or posture of any category of occupant. 1. SCOPE Benchmarking is used to discover the design intent measurements for seating compartments in vehicles when these measurements are either unknown or are specified using dif
29、fering measurement procedures.SAE J4003 Revised OCT2008 - 4 -This document provides the specifications and procedures to establish consistent measurements for benchmarking vehicle seating positions using the H-Point Machine (HPM-II1) described in SAE J4002 and the H-Point Design tool (HPD) described
30、 in SAE J4004. The HPM-II is a physical tool used to establish key reference points and measurements in a vehicle (Figure 1). The HPD is a CAD tool that aids in the benchmarking process (see Appendix A and SAE J4004). FIGURE 1 - SIDE VIEW OF THE HPM 2. REFERENCES This document contains provisions wh
31、ich reference the following documents. The latest edition of the reference applies.2.1 Applicable Publications The following publications form a part of this specification to the extent specified herein. Unless otherwise indicated, the latest version of SAE publications shall apply. 2.1.1 SAE Public
32、ations 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 J182 Motor Vehicle Fiducial Marks and Three-Dimensional Reference System SAE J826 Devices for Use in Defining and Measu
33、ring Vehicle Seating Accommodation SAE J1100 Motor Vehicle Dimensions SAE J4002 H-Point Machine (HPM-II) Specifications and Procedure for H-Point DeterminationAuditing Vehicle SeatsSAE J4004 Positioning the H-Point Design ToolSeating Reference Point and Seat Track Length 1In this document the terms
34、H-point machine, HPM, and HPM-II are used interchangeably to refer to the new H-point machine that is described in SAE J4002. The older H-point machine described in SAE J826 uses the term H-point machine.SAE J4003 Revised OCT2008 - 5 -3. DEFINITIONS See SAE J1100 for definitions of H-point, SgRP (se
35、ating reference point), LSP (lumbar support prominence), AHP (accelerator heel point), BOFRP (ball of foot reference point), SPA (shoe plane angle) and FRP (floor reference point). See SAE J4002 for a complete description and specifications for the HPM, as well as dimensional verification procedures
36、 for the HPM elements.4. HPM BENCHMARKINGOVERVIEW AND PREPARATIONS These procedures can be used to measure and assess vehicle interiors of physical properties whenever design intent information is not available. Most often, benchmarking is used to reliably quantify competitive vehicles.4.1 Use of th
37、e Physical Tool (HPM) and the CAD Tool (HPD) Benchmarking usually involves a mix of CAD and physical assessment; different users rely more on one type of assessment or the other. The extent that CAD is used will depend on the individual company, organization, and/or particular goals of the benchmark
38、ing activity.The HPM is a physical tool used in physical properties. By using the HPM in conjunction with CMM equipment and the HPD, key reference points in the vehicles interior can be established (e.g. SgRP, AHP, BOFRP, FRP). With this information, other design devices can then be used in the CAD
39、environment (e.g. eyellipses, head contours, reach curves). These measurements are described in more detail in Appendix C.4.1.1 Use of HPM At minimum, the HPM shall be installed to determine the following seat measurements: H-point location Torso angle Cushion angle Lumbar support prominence - The b
40、ack pan of the HPM is articulated to fit various seat back contours. LSP is measured with a scale attached to the HPM back pan linkage (Figure 2).FIGURE 2 - LUMBAR SUPPORT PROMINENCE (LSP) These four seat measurements can be determined without installing the HPM shoe, lower leg and thigh assemblies.
41、 SAE J4003 Revised OCT2008 - 6 -Additional measurements that are taken using the HPM or the HPD in CAD are as follows: SgRP location Shoe Plane and Floor Plane Angles BOFRP, FRP, and AHP coordinates Hip, Knee, Thigh, and Ankle Angles Head room Leg room Knee clearance Leg clearance Often users will f
42、ind it helpful to physically install the HPM shoe tool in order to directly obtain pedal and floor measurements. Setting the seat (with the HPM or HPD in it) to the driver SgRP position, and installation of the leg assemblies, will often be done in CAD. When using the H-Point Machine (HPM), interact
43、ions can occur between adjacent seating positions (i.e. having two HPMs installed in adjacent seating positions can change the results obtained for both seating positions). Therefore, only one machine should be installed in a particular row of seats during each test. 4.1.2 Use of HPD in CAD Except f
44、or the four seat measurements cited in 4.1.1, it is possible to take all other measurements in CAD using the HPD. Following is a list of data that will need to be digitized in order to benchmark in CAD with the HPD: geometry of the accelerator pedal pad at pedal centerline floor surface (depressed f
45、loor covering) around the approximate location of the heel of shoe tunnel surface near accelerator pedal, if it could interfere with the HPM shoe seat travel window, for positions with adjustable seats an H-point location, obtained by installing the HPM divot points on the cushion and back pans to a
46、id in posturing the HPD floor and seatback profile of preceding seat, for 2nd and 3rd row passenger positions headliner surface in the area where head room will be measured 4.2 Prepare the Property for HPM Installation When the HPM is used for benchmarking of vehicles, bucks (vehicle mock-ups), seat
47、s or seat assemblies, the following considerations apply. 4.2.1 Temperature and Relative Humidity Seat coverings and foam may respond differently to the weight of the HPM depending on their temperature and humidity. Sufficient time (at least 4 h) shall be allowed to ensure that the seat material rea
48、ches room temperature. Room temperature shall be 19 to 26 C (66 to 79 F). Room relative humidity should be within a range of 50% 5%. If this relative humidity is not met, record both relative humidity and room temperature. 4.2.2 Leveling The property (e.g., vehicle) shall be leveled prior to any HPM
49、 installation or measurement. Once the property is leveled, care should be taken to not lean on it, rock it, or in some other way knock it off level. Usually the top or bottom of the vehicle rocker structure is level with grid. SAE J4003 Revised OCT2008 - 7 -4.2.3 Grid Reference Unlike auditing, benchmarking will not have fiducial points available to establish vehicle grid references. Arbitr
