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Source: Toyota Motor Corp.
Toyota Global Vision President’s Message Launching a New Structure Special Feature Review of Operations
Consolidated Performance
Highlights
Management and
Corporate Information Investor InformationFinancial Section
Page 15
NextPrev
ContentsSearchPrint
ANNUAL REPORT 2013
Promoting the further uptake of hybrid vehicles
Toyota aims to make hybrid vehicles more appealing to
a wider range of customers by improving performance,
reducing costs, and expanding its lineup.
Toyota is improving aerodynamic performance by
reducing the vehicles’ air resistance. Air resistance
accounts for approximately 70% of the resistance to vehi-
cle motion at 100 kilometers per hour. If the coeffi cient of
drag for a compact hybrid vehicle is reduced from 0.30
to 0.25 at this speed, fuel economy improves by about
8%. Toyota has already achieved a high level of aerody-
namic performance in its cars, with the Prius as a prime
example. Nevertheless, Toyota continues to develop
technologies to enhance aerodynamic performance
even further by improving the exterior shape, vehicle
package, ventilation, airfl ow around the tires, and airfl ow
under the body of the car. The Head Offi ce Technical
During the 12 years between the launch of the fi rst Prius
and the launch of today’s third-generation Prius, Toyota
managed to reduce the cost of the hybrid system to
only one-third of the original cost.
Toyota plans to launch 15 new hybrid vehicle models
globally between August 2013 and December 2015.
Center contains a newly constructed Aerodynamics
Laboratory for conducting research into reducing air
resistance, improving driving performance, and reducing
wind noise, all of which will enable us to develop ever-
better cars.
With regard to cost reductions, Toyota has substan-
tially reduced the cost of hybrid systems while signifi -
cantly improving fuel economy by optimizing the hybrid
system with each successive generation of the Prius.
What is essential to building the better cars of the future?
Making Ever-Better Cars [9 of 10] Enriching Lives of Communities Stable Base of Business
Vehicle testing at the Aerodynamics Laboratory
Aerodynamics Laboratory
Large wind tunnel fan
Resistance to vehicle motion
when driving at 100km/h
Air resistance:
about 70%
Rolling
resistance:
30%
[Overview of the Aerodynamics Laboratory]
Wind tunnel type: Circuit, low-noise driving simula-
tion wind tunnel
Maximum wind speed: 250 km/h
Fan: 9m fan diameter;
8,000kW output
Air portal dimensions: 7m wide × 4.5m high
Tunnel dimensions: 110m long, 52m wide,
27m high
Main equipment: Six-component balance with
5-belt moving belt system,
sound analysis system,
wide-area, three-dimensional
fl ow analysis system
0.55
0.50
0.35
0.40
0.45
0.25
0.30
1980 1990 2000 2010 2020
0.20
Unit: Coefficient of drag
(Year)
Measures to reduce air resistance
LAND CRUISER
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