Environmental Engineering Reference
In-Depth Information
Table 11.1 Escape sports utility vehicle data
Vehicle system
Unit
Value
Body: 4-door
Height
M
1.774
Track
m
1.551
Length
m
4.256
m
2
Area:
A
fv
2.476
GVWR
kg
2,053
Engine
L
3.0 V6 16V Duratec
Transmission
4-speed, AT
Tyres: P235/70-R16
Section width:
w
s
mm
235
Section height:
h
s
mm
164.5
Rim diameter:
d
rim
in. (mm)
16 (406.4)
Hitch rating
kg
1,590 drawbar
Class
159 hitch load
In the coast down test the SUV is accelerated to 110 kph, held at speed for a
few seconds and then the transmission put into neutral. The speed intervals used
were 100 to 90 kph and then 20 to 15 kph.
Figure 11.3 is a photo of the section of level road used for the coast down
testing. This straight and level section of rural highway is protected from cross
winds by trees on both sides. The shadowing effect of the tree line helps to sig-
nificantly reduce testing errors due to ambient wind and gusts. During testing the
winds were calm to non-existent. The road surface is a typical asphalt and rock
Figure 11.3 Section of road used for coast down testing
