Environmental Engineering Reference
In-Depth Information
4.8.2 Weight tally
An assessment of vehicle mass comparing a conventional mid-sized vehicle and its
hybridized sister version was carried out by the Electric Power Research Institute
(EPRI) and documented in their final report [46]. The hybrid vehicle considered is
under the EPRI designation HEV0, which has a downsized engine that is aug-
mented with an M/G rated for an electric fraction, EF = 30%. Table 4.28 is
extracted from the EPRI study and modified for this mass budget example.
The salient features in Table 4.28 are the following:
The downsized engine introduces significant mass savings to the total.
●
Hybridization, including the traction battery, adds significant mass that vir-
tually displaces the entire mass gained through engine downsizing.
●
Table 4.28 Mass budget of CV and HV compared
Component
Conventional
vehicle (mass, kg)
Hybrid vehicle
(mass, kg)
Engine
155.6
87.1
Engine thermal
8.1
4.7
Lubrication
7.8
7.0
Engine mounts and cross members
37.7
15
Engine subtotal
209.2
113.8
Exhaust and evaporative system
41.0
31.6
Transmission
97.9
50
Alternator
4.7
-
Air conditioner compressor
6.2
11.2
Air conditioner condensor
2.2
2.3
Air conditioner plumbing + coolant, mounts
12.6
12.6
Accessory power module
-
10.0
Climate control and accessory
module subtotal
25.7
36.1
Cranking motor
6.1
-
Hybrid M/G
-
23.5
Power electronics/inverter
-
5.0
M/G and inverter thermal management
-
16.6
Electric system subtotal
6.1
45.1
Fuel system, tank + lines
13.4
9.0
12 V battery
14.8
5.0
Traction battery
-
75.2
Battery tray(s)
-
7.0
Installation hardware
-
13.5
Battery climate control
-
14.6
Energy storage system subtotal
28.2
124.3
Total power train
408.1
400.9
Glider (with chassis subsystems)
1,053
1,053
Fuel mass
38.4
27.7
Total curb mass
1,499.5
1,481.6
Occupant (1) plus cargo
136
136
Total vehicle mass
1,636
1,618
