SAE J4004_200808

Foreword
1 Scope
  1.1 Rationale
2 References
  2.1 Applicable Publications
  2.2 Related Publications
3 Definitions
  3.1 SAE J1100 Definitions
  3.2 SAE J4004 Definitions
4 Determining the Driver Seating Reference Point and
  Positioning the HPD
  4.1 Overview of Design Procedures
  4.2 Driver Designated Seating Position Design Procedure
5 Driver Seat Track Accommodation for a U.S. Driver
  Population
  5.1 Determine H-point Reference X Position
  5.2 Determine Seat Track Length
  5.3 Position H-point Travel Path in Vehicle
  5.4 Position Seat Track in Vehicle
6 Design Procedures for 2nd or 3rd Row Outboard Seating
  Positions
  6.1 Determine the Initial Target Values
  6.2 Establish Seat Positions
  6.3 Position HPD (Cushion and Back Pan Assemblies),
       Determine SgRP
  6.4 Position Shoe Tool
  6.5 Position Thigh and Lower Leg
  6.6 Short-coupled Seating
  6.7 Determine Dimensions
Appendix A Model Description and Applications for Other
           Driver Populations
  A.1 Background
  A.2 Model Description
  A.3 Tolerance
  A.4 Procedure
Appendix B HPD Specification and Tolerances
  B.1 Tolerances
  B.2 Reference posture for specifications
  B.3 Shoe tool dimensions
  B.4 Lengths
  B.5 Widths
  B.6 Heights
  B.7 Radii
  B.8 Back pan linkage mechanism
  B.9 Support points
  B.10 Divot points
  B.11 File format
Appendix C Background an the Prior Model of Driver-Selected
           Seat Position
  C.1 SAE J 1517 Method
  C.2 Key Differences Between Old and New Models

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 both driver and passenger seat positions.

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 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 male 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 selected 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.