44 Ergonomics in the Automotive Design Process
TL2 = X
97.5
− X
95
= horizontal distance between the SgRP and the rearmost H-point
Total seat track length to accommodate 95% of the drivers = TL1
where TL1 = TL23 + TL2 = X
97.5
− X
2.5
.
If SAE standard J4004 is used to locate the seat track, then the X distance of the H-point
reference point aft the PRP is computed as follows:
X
ref
= 718 − 0.24(H30) + 0.41 (L6) − 18.2t
where L6 is the horizontal distance from the PRP to the steering wheel center (see Figure
3.18) and t is the transmission type (t = 1 if clutch pedal is present and t = 0 if no clutch
pedal is present).
The foremost and rearmost points on the seat track are obtained from data presented in
Figure3.8. It should be ...