ISO 20176:2006
Road vehicles — H-point machine (HPM II) — Specifications and procedure for H-point determination
ISO 20176:2006 provides the specifications and procedures for using the H-point machine (HPM) to audit vehicle seating positions. The HPM is a physical tool used to establish key reference points and measurements in a vehicle. The H-point design tool (HPD) is a simplified CAD 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.
These H-point devices provide a method for reliable layout and measurement of occupant seating compartments and/or seats. ISO 20176:2006 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.
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1 Scope
2 Normative references
3 Definitions
3.1 H-point
3.2 H-point travel path
3.3 SgRP (Seating Reference Point), R-point, design H-point
3.4 AHP (Accelerator Heel Point)
3.5 PRP (Pedal Reference Point)
3.6 FRP (Floor Reference Point, rear passenger)
4 Measurement procedure for the three-dimensional H-point machine
4.1 Summary of installation procedure
4.1.1 Measured versus design values
4.2 Prepare vehicle and seat
4.2.1 Vehicle
4.2.2 Seat
4.3 Determine the H-point travel path (optional)
4.4 Adjust seat to design intent
4.4.1 Move seat to design intent position
4.4.2 Torso angle and cushion angle
4.4.2.1 Audit of seat and vehicle build
4.4.2.2 Audit of vehicle build
4.4.2.2.1 Position seat at design intent: Method 1
4.4.2.2.2 Position seat at design intent: Method 2
4.4.3 Seat in front of test seat
4.5 Install HPM cushion and back pan assembly
4.5.1 Install the cushion pan
4.5.2 Install the back pan
4.5.3 Level the HPM
4.6 Load the HPM
4.6.1 Load the cushion pan
4.6.2 Load the back pan
4.7 Soak time
4.8 Record measurements—digitise HPM points
4.8.1 H-point
4.8.2 Torso angle and cushion angle
4.8.3 Lumbar support prominence
5 Optional measurements for driver seat
5.1 Leg and shoe installations
5.1.1 Mark accelerator pedal centreline
5.1.2 Install the shoe fixture
5.1.3 Install the shoe tool
5.1.3.1 Interference
5.1.4 Install leg segments
5.2 Record measurements
5.2.1 Pedal Plane Angle
5.2.2 Pedal Reference Point
5.2.3 Accelerator Heel Point
5.2.4 AHP to PRP lateral offset
5.2.5 Knee angle and ankle angle
5.2.6 Thigh angle and hip angle
6 Optional measurements for 2nd or succeeding row passenger seats
6.1 Leg and shoe installation
6.1.1 Install the shoe tool
6.1.2 Install leg segments
6.1.2.1 Reposition the shoe tool (if necessary)
6.1.2.1.1 Interference
6.1.2.1.2 Long-coupled seating
6.1.2.2 Short-coupled seating
6.2 Record measurements for rear passengers
6.2.1 Floor Reference Point (FRP)
6.2.2 Floor Plane Angle
6.2.3 Knee clearance and leg room
7 Additional optional measurements
7.1 Effective head room
7.1.1 Install the head room fixture
7.1.2 Measure effective head room
8 Remove the HPM
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1 Scope
2 Normative references
3 Definitions
3.1 H-point
3.2 H-point travel path
3.3 SgRP (Seating Reference Point), R-point, design H-point
3.4 AHP (Accelerator Heel Point)
3.5 PRP (Pedal Reference Point)
3.6 FRP (Floor Reference Point, rear passenger)
4 Measurement procedure for the three-dimensional H-point machine
4.1 Summary of installation procedure
4.1.1 Measured versus design values
4.2 Prepare vehicle and seat
4.2.1 Vehicle
4.2.2 Seat
4.3 Determine the H-point travel path (optional)
4.4 Adjust seat to design intent
4.4.1 Move seat to design intent position
4.4.2 Torso angle and cushion angle
4.4.2.1 Audit of seat and vehicle build
4.4.2.2 Audit of vehicle build
4.4.2.2.1 Position seat at design intent: Method 1
4.4.2.2.2 Position seat at design intent: Method 2
4.4.3 Seat in front of test seat
4.5 Install HPM cushion and back pan assembly
4.5.1 Install the cushion pan
4.5.2 Install the back pan
4.5.3 Level the HPM
4.6 Load the HPM
4.6.1 Load the cushion pan
4.6.2 Load the back pan
4.7 Soak time
4.8 Record measurements—digitise HPM points
4.8.1 H-point
4.8.2 Torso angle and cushion angle
4.8.3 Lumbar support prominence
5 Optional measurements for driver seat
5.1 Leg and shoe installations
5.1.1 Mark accelerator pedal centreline
5.1.2 Install the shoe fixture
5.1.3 Install the shoe tool
5.1.3.1 Interference
5.1.4 Install leg segments
5.2 Record measurements
5.2.1 Pedal Plane Angle
5.2.2 Pedal Reference Point
5.2.3 Accelerator Heel Point
5.2.4 AHP to PRP lateral offset
5.2.5 Knee angle and ankle angle
5.2.6 Thigh angle and hip angle
6 Optional measurements for 2nd or succeeding row passenger seats
6.1 Leg and shoe installation
6.1.1 Install the shoe tool
6.1.2 Install leg segments
6.1.2.1 Reposition the shoe tool (if necessary)
6.1.2.1.1 Interference
6.1.2.1.2 Long-coupled seating
6.1.2.2 Short-coupled seating
6.2 Record measurements for rear passengers
6.2.1 Floor Reference Point (FRP)
6.2.2 Floor Plane Angle
6.2.3 Knee clearance and leg room
7 Additional optional measurements
7.1 Effective head room
7.1.1 Install the head room fixture
7.1.2 Measure effective head room
8 Remove the HPM
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