2.Design and Development
AISIN AW ENVIRONMENTAL REPORT 2012
EV (Electric Vehicle) and Hybrid Drive Systems
2.4
AISIN AW's contribution to society originates in the development of forward-looking, environmentally
responsible automobiles. Our drive systems for EV and hybrid vehicles help reduce exhaust gases and improve
fuel economy.
Comparison of Energy Use
ÿ10-15 Mode ÿ
Gasoline-powered car
Hybrid car

EV(electric vehicle)

Energy utilization index
We have been developing compact, highly efficient drive systems for EVs and hybrid vehicles by combining
our experience and know-how as a specialized maker of automatic transmissions with state-of-the-art motor
technology.
Our EV drive system program began with the development of a four-wheel electric car in 1986 and continued
as Toyota selected our EV drive system for the Crown Majesta EV in1993. In 1998, we produced an EV
system for Toyota's "e-com," an ultra-compact EV.
The system was also used as the drive system for a super-compact EV (Coms) sold by Toyota Auto Body
from 2000 to 2011.
For hybrid vehicle drive systems, which have been attracting increased attention recently, we are producing
two 2-motor hybrid systems for FF vehicles and two for FR vehicles.
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2.Design and Development
AISIN AW ENVIRONMENTAL REPORT 2012
FF 2-motor hybrid transmission
This 2-motor hybrid transmission combines the advantages of series hybrid and parallel hybrid architectures to
achieve optimal engine operation and super-high fuel efficiency through brake energy recovery and other
means.
The Toyota Camry Hybrid features an AW FF 2-motor
hybrid transmission.
The Toyota Prius, which has lower capacity than the
Camry Hybrid, features an AW FF 2-motor hybrid
transmission.
RWD 2-motor Hybrid Transmission / 4WD Hybrid Transmission
This 2-motor hybrid system delivers improved fuel economy without sacrificing the power and speed that are
expected of a luxury passenger car. A double reduction design that can select from two reduction gear ratios
for the drive motor output shaft enabled a design that was compact enough to be integrated into existing
RWD platforms.
The system is featured in the Lexus
0GS450h, which was launched in0
0March 2006, and the Toyota Crown
0Hybrid, which was launched in May 2008.
Lexus selected an AISIN AW 4WD
0hybridztransmission featuring00
0improved quietness for use in its
0flagship LS600h (available May 2007).
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