Environmental Engineering Reference
In-Depth Information
Electric motor
Electric motor
Battery
Battery
Gas
Gas
Engine
Engine
Plug-in at home at night;
use gasoline for longer trips
(a)
(b)
Figure 1.44 Charge sustaining and plug-in hybrids: (a) charge sustaining, or H0,
hybrid architecture; (b) plug-in hybrid with electric range capability
Figure 1.44 is the slide used to educate the respondents to CS and electric range
capable hybrids.
An interesting finding from the survey was that a CS hybrid was preferred over
the CV and that each successive increment in electric-only range of the plug-in
hybrid was preferred over its predecessor vehicle, that is H0 over CV, H20 over H0,
H60 over H40 etc. The distinction appears to be in the flexibility to drive off
electricity-only versus gasoline in a CS mode. The H0 vehicle, or power assist
hybrid, will be the principal focus of this topic. Dual mode vehicles such as H20 up
are interesting, but at present their cost is very high due to the large battery systems
needed (6-20 kWh). H60 vehicles cost as much as $5,000 more than an H20.
Amenities offered by hybrids included off-board ac power (110 V
ac
outlet at
cost of $300 was part of the survey). Interestingly, customers were not as interested
in these ac power points as they were for fast cabin heating and cooling options of
plug-in hybrids.
The key attributes of the CV, parallel hybrid H0, and plug-in hybrids H20 and
H60 are summarized in Table 1.18. The battery pack in the hybrids is assumed to
Table 1.18 Attributes of plug-in hybrids versus conventional vehicles
Attribute
Units
CV
HEV0
HEV20
HEV60
Vehicle purchase price
$
18,900
23,000
24,900
29,000
Vehicle mass
kg
1,682
1,618
1,664
1,782
Fuel economy, city/hwy
mpg
20.9/32.3
36.5/32.3
41.7/41.9
38.2/38.8
Fuel consumption, city/hwy
kWh/mi
-
-
0.30/0.34
0.31/0.35
Fuel tank capacity for
350 mi range
gallon (US)
14
9.9
8.4
9.1
Battery price
$
0
2,200
3,150
6,680
Engine power
kW
127
67
61
38
Motor-generator power
kW
-
44
51
75
Battery capacity
kWh
-
2.9
5.9
17.9
