This Standard provides the specifications and procedures for using the H-point machine (HPM(Footnote 1)) to audit vehicle seating positions. The HPM is a physical tool used to establish key reference points and measurements in a vehicle (see Figure 1 and Appendix A). The H-point design tool (HPD) is a simplified CAD(Footnote 2) version of the HPM@ which can be used in conjunction with the HPM to take the optional measurements specified in this document@ or used independently during product design (see Appendix D). These H-point devices provide a method for reliable layout and measurement of occupant seating compartments and/or seats. This document specifies the procedures for using the H-point machine (HPM) to audit (verify) key reference points and measurements in a vehicle. The devices are intended for application at designated seating positions. They are not to be construed as tools that measure or indicate occupant capabilities or comfort. They are not intended for use in defining or assessing temporary seating@ such as folding jump seats. Rationale With this revision@ the 2004 version of SAE J4002 has been subdivided into three separate standards in order to specify in more detail the uses of the HPM II and HPD in auditing vehicles (J4002:2005)@ benchmarking vehicles (J4003)@ and in designing vehicle interior packages (J4004). Footnote 1 - All references to H-point machine or HPM in this standard refer to the new SAE H-point machine (HPM-II)@ unless otherwise noted. Footnote 2 - CAD is an acronym for computer-aided design. In a general sense@ it has come to encompass any software system/approach to automotive design and development@ and is often used to refer to CAE (computer-assisted engineering) and CAM (computer-assisted manufacturing) software systems as well.
SAE J4002-2005 history
2022SAE J4002-2022 H-Point Machine (HPM-II) Specifications and Procedure for H-Point Determination—Auditing Vehicle Seats
2010SAE J4002-2010 H-Point Machine (HPM-II) Specifications and Procedure for H-Point Determination Auditing Vehicle Seats
2005SAE J4002-2005 (R) H-Point Machine and Design Tool Procedures and Specifications
2004SAE J4002-2004 (R) H-Point Machine and Design Tool Procedures and Specifications