The devices of this SAE Standard provide the means by which passenger compartment dimensions can be obtained using a deflected seat rather than a free seat contour as a reference for defining seating space. All definitions and dimensions used in conjunction with this document are described in SAE J1100. These devices are intended only to apply to the driver side or center occupant seating spaces and are not to be construed as instruments which measure or indicate occupant capabilities or comfort. This document covers only one H-point machine installed on a seat during each test. Certified H-point templates and machines can be purchased from:
SAE International
400 Commonwealth Drive
Warrendale, PA 15096-0001
Specific procedures are included in Appendix A for seat measurements in short- and long-coupled vehicles and in Appendix B for measurement of the driver seat cushion angle. Specifications and a calibration inspection procedure for the H-point machine are given in Appendix C. Additional considerations are necessary when a Head Restraint Measuring Device (HRMD) is mounted to an H-point machine (Appendix D).
Rationale
The March 2008 revision incorporated an inspection procedure for checking calibration of the H-point machine (Appendix C). It also added specifications for the mounting surface of the head restraint measuring device.
Other changes included:
-
10 year phase-out period for the HPM
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Revision of HPM weight specification from 167 to 169.6 lb to reflect current HPM build
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New ambient humidity specification
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Narrower range of ambient test temperatures
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Clarification of muslin cloth specification
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Extensive revision of short couple method and addition of long couple method to Appendix A
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Terminology consistent with SAE J1100
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Editorial clarifications
This revision adds a check for knee and ankle rotation efforts to Appendix C. It also corrects an error in the specification for the H1 divot rearward to the vertical angle block surface. In addition, the length of the optional CAD shoe was changed from 200 to 203 mm to align with the current shoe length. A few other minor editorial changes were made to the text and to Figure A4.
SAE J4002 (HPM-II) and SAE J826 (HPM) shall co-exist for a transition period of at least 10 years, preferably no longer, from the first publication date of SAE J4002 (August 2005). Following this transition period SAE J826 will be withdrawn. During the transition period, it remains up to the vehicle designers to decide which HPM to use. Regulatory bodies and other parties that need to know shall be informed regarding which HPM was used.
The Human Accommodation and Design Devices Standards Committee is responsible for developing and maintaining SAE Standards, Recommended Practices, and Information Reports related to tools, models and procedures to create and improve the occupant package ergonomic layout of the vehicle's interior tools and procedures for consistent measurement of vehicle dimensions and seat dimensions taken during design, benchmarking, and auditing. The committee actively leads and works to have its standards adopted internationally. Participants in the SAE Human Accommodation and Design Devices Standards Committee include OEMs, suppliers, academicians, consulting firms, government, and other interested parties.
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Devices for Use in Defining and Measuring Vehicle Seating Accommodation
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Devices for Use in Defining and Measuring Vehicle Seating Accommodation
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