1、SURFACE VEHICLE RECOMMENDED PRACTICE J1521 DEC2014 Issued 1985-10 Reaffirmed 2014-12 Superseding J1521 FEB2009 Truck Driver Shin-Knee Position for Clutch and AcceleratorRATIONALE J1521 has been reaffirmed to comply with the SAE five-year review policy. _ SAE Technical Standards Board Rules provide t
2、hat: “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 therefrom, is the sole responsibility of the user.”
3、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 2014 SAE International All rights reserved. No part of this publication may be reproduced, stored in a retri
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5、erServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/www.sae.org/technical/standards/J1521_201412 1. ScopeThis SAE Recommended Practice describes two-dimensional, 95th percentile truck driver, side view,seated shi
6、n-knee contours for both the accelerator operating leg and the clutch operating leg for horizontallyadjustable seats (see Figure 1). There is one contour for the clutch shin-knee and one contour for theaccelerator shin-knee. There are three locating equations for each curve to accommodate male-to-fe
7、maleratios of 50:50, 75:25, and 90:10 to 95:5.2. References2.1 Applicable PublicationsThe following publications form a part of the specification to the extent specifiedherein. Unless otherwise indicated, the latest revision of SAE publications shall apply.2.1.1 SAE PUBLICATIONSAvailable from SAE, 4
8、00 Commonwealth Drive, Warrendale, PA 15096-0001.SAE J1100Motor Vehicle DimensionsSAE J1516Accommodation Tool Reference PointM. S. Sanders (1983), “U.S. Truck Driver Anthropometric and Truck Workspace Data Survey,“ FinalReport Submitted to: Society of Automotive Engineers, Inc., Warrendale, PA.B. E.
9、 Shaw and M. S. Sanders (1984), “Female U.S. Truck Driver Anthropometric and Truck WorkspaceData Survey,“ Final Report Submitted to: Society of Automotive Engineers, Inc., Warrendale, PA.3. Definitions3.1 Drivers Shin-Knee Range (Clutch and Accelerator)A statistical representation of the drivers shi
10、n-kneelocation in a heavy-duty truck or bus with horizontally adjustable seats.3.2 Drivers Shin-Knee Contour (Clutch)An arc with a radius of 103.25 mm which defines the drivers shin-kneerange (Clutch).a. (H30) H-point heightb. (CX) Clutch horizontalhorizontal distance from accommodation heel referen
11、ce point to center ofclutch face in mm.c. (CZ) Clutch heightvertical distance from accommodation heel reference point to center of clutch facein mm.d. (CHX) Chair horizontalhorizontal distance from accommodation heel reference point toaccommodation tool reference point.3.3 Drivers Shin-Knee Contour
12、(Accelerator)An arc with a radius of 113.25 mm which defines the driversshin-knee range (accelerator).a. (H30) H-point height3.4 Vehicle Accommodation Tool Reference LineA two-dimensional side view line which defines a horizontalreference point as a function of H-point height (H30) to which shin-kne
13、e contours are referenced in vehiclespace. Three different lines are provided to accommodate truck driver populations with male-to-female ratiosof 50:50, 75:25, and 90:10 to 95:5. (See SAE J1516.)3.5 Shin-Knee Position Locator LineA series of two-dimensional side view lines which define the shin-kne
14、econtour x and z locations as a function of seat height (H30). Three sets of locator lines are defined toaccommodate truck driver populations with male-to-female ratios of 50:50, 75:25, and 90:10 to 95:5. The threelines are determined using one of two methods.3.5.1 The x and z values for the shin-kn
15、ee locator lines for the clutch can be determined by using the followingequations:For 50:50 male-to-female ratio:(Eq. 1)(Eq. 2)For 75:25 male-to-female ratio:(Eq. 3)(Eq. 4)x 12049.4057 CHX()15.7837 0.0222 CX()CZ()0.04836.5 109()H30()CX()()+() H30()6.7718 0.0105 CX() 0.0201 CZ()+CX()17.9401 0.0001 CX
16、() 0.0030 CZ()+ CZ()37.9352 0.0010 CZ()+=z 2210.6823 CHX()3.3278 0.0370 CX()CZ()0.0403 2.7 109()H30()CX()+()+() H30()0.4561 0.0155 CX()0.0167 CZ()+ CX()28.7615 0.0009CX()0.0003 CZ()() CZ()32.7120 0.0007 CZ()+=x 4229.4784 CHX()5.8753 0.0789+CX()CZ()0.0473 3.9 109()H30()CX()+H30()2.3832 0.0351 CX()0.0
17、232 CZ()+ CX()64.3385 0.0002 CX() 0.0024 CZ()+CZ()39.6780 0.0007 CZ()+=z 12254.3381 CHX()14.3121 0.0450 CX() CZ()0.0692 6.6 109()H30()CX()+H30()7.6863 0.0219 CX() 0.0326 CZ()+ CX()37.9286 0.0009 CX() 0.0016 CZ()CZ()56.1338 0.0006 CZ()+=SAE INTERNATIONAL J1521 Reaffirmed DEC2014 Page 2 of 7_ For 90:1
18、0 to 95:5 male-to-female ratio:(Eq. 5)(Eq. 6)3.5.2 The shin-knee locator lines for the accelerator can be determined by using the following equations:For 50:50 male-to-female ratio:(Eq. 7)(Eq. 8)For 75:25 male-to-female ratio:(Eq. 9)(Eq. 10)For 90:10 to 95:5 male-to-female ratio:(Eq. 11)(Eq. 12)4. B
19、ackgroundThe shin-knee contours were obtained by developing data gathered during the Truck DriverAnthropometric and Work Space Survey (see M.S. Sanders 1983 and B.E. Shaw and M.S. Sanders 1984).This survey utilized a static seating buck in which drivers were photographed in three seat heights in thr
20、eedifferent configurations. From the photographs, points on each subject were defined at the forward point of theknee where the knee and shin meet. This was done for the right leg in position for operating the acceleratorpedal, and the left leg in position to operate the clutch pedal. The clutch was
21、 locked in an undepressedposition while the accelerator was allowed to move to the drivers selected operating position. These pointswere related in true scale and referenced from the seat H-point. At this point, the data was separated into maleand female. Utilizing statistical techniques, the male a
22、nd female data was recombined to form four male-to-female population ratios: 50:50, 75:25, 90:10, and 95:5. Ellipses were generated based on the four populationmixes representing 95% accommodation levels, for each population mix, for both the clutch and acceleratorshin-knee points. The contours for
23、clutch and accelerator were determined by rotating the SAE manikin legabout the respective heel points with the forward knee point kept on the ellipse itself. This identified the 2 inknee curve in several locations about the ellipse. A best fit curve was drawn to encompass these kneelocations which
24、defines the final contour for the clutch and accelerator. Due to curve similarities, the locatingequation for the 90:10 and 95:5 male-to-female population ratios were combined.x 14601.7633 CHX()17.7652 0.0081 CX()CZ()0.0506 8.6 109()H30()CX()+H30()8.7461 0.0034 CX()0.0243 CZ()+ CX()6.6220 5.7610 CX(
25、)0.0035 CZ()+CZ 42.6080 0.0010 CZ()+=z 13495.0413 CHX()15.2231 0.3160 CX() CZ()0.1508 3.4 108()H30()CX()+H30()8.8427 0.1641 CX() 0.0769 CZ()+ CX()271.9531 0.0013 CX() 0.0085CZ()() CZ()127.735 0.0012 CZ()+=x991.525 0.8658 H30()+()2 991.525 0.8658 H30()+718.243 0.4462 H30()+()=z 334.882 0.637 H30()=x
26、1036.737 0.9074 H30()+()2 1036.737 0.9074 H30()+741.943 0.4595 H30()+()=z 373.098 0.696 H30()=x 1093.64 0.9932 H30()+()2 1093.64 0.9932 H30()+774.852 0.5087 H30()+()=z 324.916 0.5832 H30()=SAE INTERNATIONAL J1521 Reaffirmed DEC2014 Page 3 of 7_ There is one general contour for both the clutch shin-k
27、nee and the accelerator shin-knee which are to be usedto accommodate drivers in heavy truck design for three ranges of male-to-female population mixes. Thesecurves or contours are representative of shin-knee locations in a truck environment and are to be used toprovide shin-knee definition.5. Applic
28、ation5.1 The shin-knee locator lines and contours provide a drafting tool from which truck driver shin-knee locations canbe described in vehicles with horizontally adjustable seats.5.2 The shin-knee locator lines and contours are applicable only to motor vehicles, whether trucks, buses, ormultipurpo
29、se passenger vehicles with bucket or bench seats, that are within the following range of driverworkspace dimensions:a. (L40) Back angle: 11.0 to 18 degreesb. (H30) H point height: 405 to 530 mmc. (W9) Steering wheel diameter: 450 to 560 mmd. (L23) Normal driving seat track travel: 100 mm or greatere
30、. (CX) Clutch horizontal: 55 to 160 mmf. (CZ) Clutch height: 130 to 320 mm5.3 The shin-knee locator lines and contours are applicable to three male-to-female population ratios: 50:50,75:25, and for the range of 90:10 to 95:5.6. Shin-Knee Position Contour Location6.1 Identify which contour is to be u
31、sed, the clutch or accelerator.6.2 Identify which of the three male-to-female population ratios that is to be accommodated, 50:50, 75:25, or 90:10to 95:5.6.3 Use the method described in SAE J1516 to locate the reference point in vehicle space. Select the point on thisline at the workspace H-point he
32、ight (H30). This point defines the shin-knee contour reference station.6.4 Use the appropriate shin-knee position locator line for the population mix to be accommodated (see 6.2).Solve the equations in 3.5 or use Tables 1, 2, and 3 (for accelerator shin knee only) to determine the x and zcoordinates
33、 for the shin-knee contour. Clutch shin-knee contour must use equations:(Eq. 13)(Eq. 14)These coordinates will be in millimeters forward and above, in vehicle space, H30 on the accommodation toolreference point.6.4.1 CLUTCH CONTOURUsing the point obtained in 6.4 as the center, draw an arc on the for
34、ward side of thispoint in vehicle space with a radius of 103.25 mm. This arc should approximate 1/4 of a circle drawn througha vertical line through the point forward in 6.4 to a horizontal line drawn through the same point such that thearc is above and forward of the point found in 6.4. (See Figure
35、 1.)6.4.2 ACCELERATOR CONTOURSame as 6.4.1 with a radius of 113.25 mm.CX() Clutch horizontal: 55 to 160 mmCZ() Clutch height: 130 to 320 mmSAE INTERNATIONAL J1521 Reaffirmed DEC2014 Page 4 of 7_ FIGURE 1CLUTCH AND ACCELERATOR SHIN-KNEE POSITION CONTOURSTABLE 1ACCELERATOR SHIN-KNEE LOCATION(50:50 MAL
36、E-TO-FEMALE RATIO)HP X Z405 434.188 76.897410 434.055 73.712415 433.922 70.527420 433.789 67.342425 433.656 64.157430 433.523 60.972435 433.39 57.787440 433.257 54.602445 433.124 51.417450 432.991 48.232455 432.858 45.047460 432.725 41.862465 432.592 38.677470 432.459 35.492475 432.326 32.307480 432
37、.193 29.122485 432.06 25.937490 431.927 22.752495 431.794 19.567500 431.661 16.382505 431.528 13.197510 431.395 10.012515 431.262 6.827520 431.129 3.642525 430.996 0.456999530 430.863 2.728SAE INTERNATIONAL J1521 Reaffirmed DEC2014 Page 5 of 7_ TABLE 2ACCELERATOR SHIN-KNEE LOCATION(75:25 MALE-TO-FEM
38、ALE RATIO)HP X Z405 442.451 91.218410 442.393 87.736415 442.335 84.258420 442.277 80.778425 442.219 77.298430 442.161 73.818435 442.103 70.338440 442.045 66.858445 441.987 63.378450 441.929 59.898455 441.871 56.418460 441.813 52.938465 441.755 49.458470 441.697 45.978475 441.639 42.498480 441.581 39
39、.018485 441.523 35.538490 441.465 32.058495 441.407 28.578500 441.349 25.098505 441.291 21.618510 441.233 18.138515 441.175 14.658520 441.117 11.178525 441.059 7.698530 441.001 4.218SAE INTERNATIONAL J1521 Reaffirmed DEC2014 Page 6 of 7_ PREPARED BY THE SAE TRUCK AND BUS OCCUPATIONAL PARAMETERS SUBC
40、OMMITTEEOF THE SAE TRUCK AND BUS OCCUPANT AND ENVIRONMENT COMMITTEEREAFFIRMED BY THE SAE TRUCK AND BUS HUMAN FACTORS SUBCOMMITTEETABLE 3ACCELERATOR SHIN-KNEE LOCATION(95:5 AND 90:10 MALE-TO-FEMALE RATIO)HP X Z405 446.263 88.72410 446.142 85.804415 446.021 82.888420 445.9 79.972425 445.779 77.056430
41、445.658 74.14435 445.537 71.224440 445.416 68.308445 445.295 65.392450 445.174 62.476455 445.053 59.56460 444.932 56.644465 444.811 53.728470 444.69 50.812475 444.569 47.896480 444.448 44.98485 444.327 42.064490 444.206 39.148495 444.085 36.232500 443.964 33.316505 443.843 30.4510 443.722 27.484515 443.601 24.568520 443.48 21.652525 443.359 18.736530 443.238 15.82SAE INTERNATIONAL J1521 Reaffirmed DEC2014 Page 7 of 7_
