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 revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions.Copyright 2011 SAE International All rights reserved. No part of this pub
3、lication may 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: +1 724-776-4970
4、(outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.orgSAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/J1517_201110SURFACEVEHICLERECOMMENDEDPRACTICEJ1517 OCT2011 Issued 1985-10Revised 201
5、1-10 Superseding J1517 FEB2009 Driver Selected Seat Position for Class B Vehicles - Seat Track Length and SgRP RATIONALEPreviously this practice provided procedures for determining the seat track placement and length necessary to accommodate a given percentage of drivers in both Class A vehicles (Pa
6、ssenger Cars and Light Trucks) and Class B vehicles (Heavy Trucks and Buses. Procedures for Class A vehicles have been updated and moved to SAE J4004 Positioning the H-Point Design Tool Seating Reference Point and Seat Track Length. This practice has been revised to apply only to Class B vehicles.Th
7、is edition of SAE J1517 includes a recommended location for the SgRP, clarification of the procedure for determining seat track length and location, and utilization of new definitions and procedures in SAE J1100. The seat track procedure is similar to the Class A procedure given in SAE J4004. Since
8、several SAE J1100 vehicle interior dimensions are related to the SgRP, it is important that SgRP be determined in a consistent manner across Class B vehicles. 1. SCOPE This Recommended Practice provides a procedure to locate driver seat tracks, establish seat track length, and define the SgRP in Cla
9、ss B vehicles (heavy trucks and buses). Three sets of equations that describe where drivers position horizontally adjustable seats are available for use in Class B vehicles depending on the percentages of males to females in the expected driver population (50:50, 75:25, and 90:10 to 95:5). The equat
10、ions can also be used as a checking tool to estimate the level of accommodation provided by a given length of horizontally adjustable seat track. These procedures are applicable for both the SAE J826 HPM and the SAE J4002 HPM-II. 2. REFERENCES 2.1 Applicable Documents The following publications are
11、provided for information purposes only and are not a required part of this SAE Technical Report.2.1.1 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 J1100 M
12、otor Vehicle Dimensions SAE J1516 Accommodation Tool Reference Point SAE J1517 Revised OCT2011 Page 2 of 8 2.2 Related Publications The following publications are provided for information purposes only and are not a required part of this SAE Technical Report.2.2.1 SAE Publications Available from SAE
13、 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.N. L. Philippart, R. W. Roe, A. J. Arnold, T. J. Kuechenmeister (1984), “Driver Selected Seat Position Model,” SAE Paper No. 840508, Detroit, MI. M.
14、 S. Sanders (1983), “U. S. Truck Driver Anthropometric and Truck Workspace Data Survey,” Final Report Submitted to: SAE International, Warrendale, PA. B. E. Shaw and M. S. Sanders (1984), “Female U. S. Truck Driver Anthropometric and Truck Workspace Data Survey,” Final Report Submitted to: SAE Inter
15、national, Warrendale, PA. 3. DEFINITIONS The following definitions are given in SAE J1100: a. H-point b. Seat SgRP height (H30) c. Steering wheel diameter (W9) d. Accelerator heel point (AHP) e. Seating reference point (SgRP) 3.1 CLASS B VEHICLES Vehicles whose seat SgRP height (H30) is between 405
16、and 530 mm, and steering wheel diameter (W9) is between 450 and 560 mm. NOTE: Class B vehicles include heavy trucks, some medium duty trucks, and some buses. In most cases these vehicles have flat treadle accelerator pedals and horizontal fore/aft seat travel paths. 3.2 H-POINT TRAVEL PATH Travel pa
17、th of seat H-point when the seat is moved through its full range of vertical and fore/aft adjustments. NOTE: The seat is loaded with a weight equal to that of an SAE H-point machine (or an HPM is installed in the seat per SAE J826 or J4002) and all other seat adjustments are set to the manufacturers
18、 design nominal condition. 3.3 DESIGN H-POINT TRAVEL PATH Fore/aft H-point travel path with the seat vertical adjustment set at its mid-height value. NOTE: The design H-point travel path is used to determine SgRP and H30. SAE J1517 Revised OCT2011 Page 3 of 8 3.4 DRIVER SELECTED SEAT POSITION LINES
19、Series of two-dimensional side-view lines which express driver selected seat position aft of AHP for various accommodation levels as a function of seat H-point height above AHP. NOTE 1: Three sets of lines are provided to accommodate truck driver populations with male-to-female ratios of 50:50, 75:2
20、5, and 90:10 to 95:5.NOTE 2: The AHP location is determined using SAE J1516. 3.5 SGRP LINE Two-dimensional side-view line which defines the SgRP x location as a function of H30 relative to the AHP for the purpose of defining a specified level of driver fore/aft seat accommodation. NOTE 1: This line
21、is the 95thpercentile driver seat position line for a 50/50 male/female driver population. NOTE 2: This line is used to define the SgRP in a consistent way across vehicle manufacturers, enabling meaningful comparisons of several SAE J1100 dimensions reported by each manufacturer. 4. BACKGROUND Seat
22、position data used to develop the driver selected seat position lines for Class B vehicles were collected from a heavy truck workspace study (see Reference M. S. Sanders, 1983 and B. E. Shaw and M. S. Sanders, 1984).1The workspace simulated three truck cab configurations with H-point heights of 405,
23、 468, and 530 mm and steering wheel diameters of 457, 508, and 560 mm. All configurations had a treadle accelerator pedal and suspended clutch. Driver selected seat position of male and female heavy truck drivers were collected in the workspace. Data were converted to H-point locations relative to a
24、n accelerator heel point reference for each package. See SAE J1516 for determining the accelerator heel point. A statistical technique was used to generate four populations from the original truck workspace data with the following male-to-female ratios 50:50, 75:25, 90:10, and 95:5. The 2.5, 5th, 10
25、th, 50th, 90th, 95th, and 97.5 percentile H-point locations were determined for the cab configurations by population mix and plotted as a function of H-point height (H30). Straight lines were fit to each of the four mixes of data for each percentile level. (Second degree equations were not used due
26、to paucity of data.) Separate sets of equations define horizontal H-point locations as a function of H-point height for truck driver populations with 50:50 and 75:25 male-to-female ratios. The sets of linear expressions for populations with 90:10 and 95:5 male-to-female ratios were very similar. The
27、refore, one equation, appropriate for both mixes, was developed to define horizontal H-point location as a function of H-point height. These three sets of accommodation lines define horizontal H-point location as a function of H-point height for three separate truck driver populations for Class B ve
28、hicles.The intersection of the design H-point travel path with the accommodation lines can be used to estimate the seat track location (aft of the accelerator point) and length of horizontal seat travel heel needed to provide a specified level of accommodation for the target gender percentages of dr
29、ivers. 1Changes in the stature and weight of the current truck driver population relative to the driver population in the Sanders, et.al., study may require some adjustments to the seat track length and location in section 6. SAE J1517 Revised OCT2011 Page 4 of 8 5. DRIVER SELECTED SEAT POSITION ACC
30、OMMODATION LINES Equations are given that define driver selected seat position as a function of H-point height. Three sets of first degree equations as a function of H-point height (z) define horizontal H-point location for Class B vehicles at the 2.5, 5th, 10th, 50th, 90th, 95th, and 97.5 percentil
31、e accommodation levels for three different male/female driver populations. See Figure 1 and equation sets 1, 2 and 3.For 50:50 male-to-female ratios: X_97.5= 916.50 0.471z X_95= 900.23 0.471z X_90= 888.44 0.487z X_50= 798.74 0.446z X_10= 668.97 0.340z X_5= 637.76 0.317z X_2.5= 625.21 0.327z (Eq. 1)
32、For 75:25 male-to-female ratios: X_97.5= 941.88 0.514z X_95= 928.86 0.519z X_90= 909.79 0.512z X_50= 822.44 0.460z X_10= 699.71 0.354z X_5= 668.86 0.339z X_2.5= 641.35 0.329z (Eq. 2) For 90:10 to 95:5 male-to-female ratios: X_97.5= 929.13 0.480z X_95= 922.49 0.494z (SgRP line) X_90= 903.03 0.485z X_
33、50= 855.31 0.509z X_10= 785.36 0.492z X_5= 762.17 0.485z X_2.5= 732.62 0.460z (Eq. 3) where:xiis the location in mm of the ithpercentile of the driver seat position distribution aft of the accelerator heel point, and z is the vertical distance from AHP to the seat H-point, in mm. SAE J1517 Revised O
34、CT2011 Page 5 of 8 FIGURE 1: CLASS B VEHICLE DRIVER SEAT POSITION ACCOMMODATION LINES AND SGRP LOCATION 6. PROCEDURE FOR SEAT TRACK LENGTH AND LOCATION 6.1 Refer to SAE J1516 for determining the accelerator heel point location to position the driver accommodation lines. 6.2 Determine H30. For a hori
35、zontal design H-point travel path, H30 is the height of this path above the AHP. For an inclined H-point travel path, the SgRP location must first be determined. The SgRP is located graphically at the intersection of the design H-point travel path and the SgRP line. H30 is the vertical distance of t
36、he SgRP above the AHP. See 7.2. 6.3 Select the driver accommodation lines that correspond to the desired population mix of males and females. Locate these lines to the same accelerator heel point reference used to locate the accommodation tool reference point in SAE J1516. Note that the 50th percent
37、ile selected seat position line will coincide with the accommodation tool reference line. 6.3.1 Designing a vehicle to provide accommodation for 95% of drivers requires locating the H-point travel path between the 2.5 and 97.5 percentile seat position accommodation lines for the given seat H-point h
38、eight (H30).Seat Track Length: Figure 2 illustrates the seat track length needed to accommodate 95% of drivers for the 3 different driver population mixes as a function of H30. SAE J1517 Revised OCT2011 Page 6 of 8 FIGURE 2: SEAT TRACK LENGTHS FOR 95% ACCOMMODATION OF THE 3 DRIVER POPULATIONS FOR VA
39、RIOUS H-POINT HEIGHTS Seat Track Location: Figure 3 illustrates the placement of the seat track for a 75:25 male/female driver population and a seat track length that accommodates 95% of that driver population. Similar plots for the other population mixes are readily constructed from the accommodati
40、on equations. FIGURE 3: SEAT TRACK AND SGRP LOCATIONS FOR 95% ACCOMMODATION OF A 75:25 DRIVER POPULATION FOR 3 DIFFERENT SEAT HEIGHTS SAE J1517 Revised OCT2011 Page 7 of 8 6.3.2 To check driver seat track accommodation for any given seat track length and location, examine the pattern of intersection
41、s between the design H-point travel path and the various accommodation lines. Estimate accommodation values for seat track endpoints that are between 2 accommodation lines. 7. PROCEDURE FOR LOCATING SGRP 7.1 Define SgRP Line The SgRP line is the 95thpercentile driver seat position accommodation line
42、 for a 90:10 to 95:5 male/female driver population.SgRPx=922.490.494z (Eq. 4) where:SgRPxis the SgRP x location in mm aft of the accelerator heel point, andz is the height of the SgRP above the accelerator heel point in mm. 7.2 SgRP Locating Procedure In side view the SgRP is at the intersection of
43、the SgRP line with the design (mid-vertical) H-point travel path. See Figures 1 and 3.For a horizontal H-point design travel path, H30 is height of the path above AHP. The SgRP x rear of AHP is calculated by setting z=H30 in equation 4. For an inclined design H-point travel path, a few iterations ma
44、y be needed to locate the SgRP line with respect to the AHP with the correct shoe plane angle as defined in SAE J1516. Once this is done the intersection of the SgRP line with the design H-point travel path, and the value of H30, can be determined. See Figure 4. 7.2.1 SgRP for Short Seat Track Trave
45、l If the H-point travel path is not long enough to include the SgRP calculated from the SgRP equation, then the SgRP shall be defined and positioned at the rearmost point of the (mid-height) H-point travel. FIGURE 4: SGRP, SGRP LINE, AND H30 FOR AN INCLINED DESIGN H-POINT TRAVEL PATH SAE J1517 Revis
46、ed OCT2011 Page 8 of 8 8. NOTES 8.1 Marginal Indicia A change bar (l) located in the left margin is for the convenience of the user in locating areas where technical revisions, not editorial changes, have been made to the previous issue of this document. An (R) symbol to the left of the document tit
47、le indicates a complete revision of the document, including technical revisions. Change bars and (R) are not used in original publications, nor in documents that contain editorial changes only. PREPARED BY THE SAE TRUCK AND BUS HUMAN FACTORS COMMITTEE OF THE TRUCK AND BUS BODYAND OCCUPANT ENVIRONMENT STEERING COMMITTEE
