Environmental Engineering Reference
In-Depth Information
2010 Chevy Camaro SS
Zeta platform
Engine: 426 hp (318 kW), 570 Nm
Transmission: 6L80E six speed
Trans. Input shaft torque: 553 Nm
t
z60
= 5.0 s
Standing ¼ mi: 13.38 s
Speed in ¼ mi: 105.5 mph
Figure 3.1 The 2010 Camaro SS (SAE Automotive Engineering International,
October 2009, pp. 29-31)
Table 3.1 Specifications of the Chevy Camaro SS
Transmission 6L80E
Vehicle specifications
1st
4.03
Engine
kW
318
2nd
2.36
Tyres,
r
w
=
P275/40R20
0.364m
3rd
1.53
Curb mass
M
v
1,754 kg
4th
1.15
Aerodynamic drag
C
d
~0.25
2.37m
2
5th
0.85
Frontal area
A
f
6th
0.67
Roll resistance
C
rr
~0.009
Reverse
3.06
Max engine speed
n
eng
rpm
Final drive
3.27
Max veh. speed
V
WOT
mph
is taken as the tyre to road adhesion limit. The axle torque breakpoint shown in
Figure 3.2 is taken as the wheel speed representing this traction limit when the tyre
to road friction coefficient is 0.85. In comparison, the Jaguar XJ-S (3-speed auto-
matic: first 2.5:1, second 1.5:1 and third 1.0:1 with 2.88:1 final drive) has a drive-
line gear ratio of 7.2:1 in low gear.
In the second row of Table 3.2, the Jaguar XJ-S is taken as the reference
point since the gearbox ratios are known and the larger engines are then used
to replace the production V12 to determine their effect on driveline matching.
The immediate difference is the fact that driveline gear ratio in low gear
(maximum ratio) quickly trends towards an overall ratio of 2:1. The second
Table 3.2 Characterizing the vehicle power plant
Engine
type
Vehicle
mass
(kg)
Engine
power
(kW)
Engine
torque
(Nm)
Gear
ratio
high
Gear
ratio
low
Traction
limited
force (N)
Axle
torque
limit
(Nm)
Speed
low
gear
Max.
vehicle
speed
0-60
time (s)
V10
1,800
373
712
2.88 3.8
7,500
2,370
107
200
8.6
V12
1,900
208
415
2.88 7.2
7,914
2,500
58
162
7.2
V16
2,270
746
1,356
2.1
2.23 9,454
2,787
180
260
8.4
