Mazda 2011 Annual Report Download - page 18

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1 Pursuing ideal combustion with highly efficient engines that achieve world-beating
compression ratios
Mazda is focusing on the 70–80% of energy created by the engine that is lost before reaching the wheels as power. By pursuing ideal combustion, we
have increased efficiency and made significant advances in fuel efficiency, power, exhaust functions, etc.
2 Pursuing ideal energy transfer with highly efficient transmissions
The transmission not only improves fuel economy, it also has a major influence on the car’s performance. In the pursuit of ideal energy transfer, Mazda has
developed transmissions that maximize engine performance by efficiently transmitting energy to the wheels and responding to the driver’s intentions.
3 Pursuing ideal structure with a body and chassis that are lightweight yet rigid with
outstanding crash safety performance
Reducing the weight of a vehicle not only improves fuel economy, it also dramatically improves the car’s basic functions of “driving, turning, and
stopping.” In the pursuit of an ideal body structure, Mazda has applied new construction methods and replaced materials used for comprehensive
weight reduction while maintaining high rigidity and crash safety with a lighter body weight.
ENGINES
1 Pursuing ideal combustion with highly efficient engines that achieve world-beating compression ratios
New-Generation SKYACTIV TECHNOLOGY
Mazda has named the breakthrough new-generation tech-
nology being developed under the Building Block Strategy
SKYACTIV TECHNOLOGY, and this technology is successively
being incorporated into new products sold from 201 1 onward.
SKYACTIV TECHNOLOGY is an umbrella name for a range of
breakthroughs. Rather than aiming for a best balance among
conflicting targets, this technology makes it possible to
significantly improve functionality and resolve all of these
targets simultaneously. SKYACTIV TECHNOLOGY comprises
the following three main technologies.
SKYACTIV-G new-generation highly efficient direct-injection gasoline engine
A new-generation highly efficient direct-injection gasoline engine that achieves the world’s highest gasoline
engine compression ratio and improves fuel efficiency and low- to mid-speed torque by 15%*
Significantly improved engine efficiency thanks to the high compression combustion, resulting in 15% increases in fuel
efficiency and torque
Improved everyday driving thanks to increased torque at low- to mid-engine speeds
A 4-2-1 exhaust system, cavity pistons, multihole injectors and other innovations enable the high compression ratio
SKYACTIV-D new-generation highly efficient clean diesel engine
With the world’s lowest diesel-engine compression ratio, this clean, highly efficient diesel engine will
comply with strict exhaust gas regulations globally without the aid of expensive NOx (nitrogen oxides)
after-treatment systems.
20% better fuel efficiency thanks to the low compression ratio of 14.0:1
A new two-stage turbocharger realizes smooth and linear response from low to high engine speeds, and greatly increases
low- and high-end torque
Complies with global emissions regulations (Euro6 in Europe, Tier2Bin5 in North America, and the Post New Long-Term
Regulations in Japan) without expensive NOx after-treatment
95RON
Torque distribution
of competitor vehicles
in third-party tests
Performance improvement
SKYACTIV-G 2.0-liter
15%
Current Mazda 2.0-liter
gasoline engine
Good
Poor
0 1,000 2,000 3,000 4,000 5,000 6,000 7,000
Torque (Nm)
Engine rpm
Brake specific fuel consumption (g/kwh)
Load (BMEP)
95RON
Fuel economy improvement
SKYACTIV-G 2.0L
15%
1,500rpm
Current Mazda 2.0-liter
gasoline engine
Current Mazda 2.2-liter
diesel engine
Poor
Good
0 200 400 600 800 1,000 1,200 1,400 1,600
Torque (Nm)
Engine rpm
Performance improvement
SKYACTIV-D
Current Mazda 2.2-liter diesel engine
Good
Poor
1,000 1,500 2,000 2,500 3,000 3,500 4,000 4,500 5,000
2,000rpm
Fuel consumption
distribution of competitor
vehicles in third-party tests
Fuel economy improvement
SKYACTIV-D
Current Mazda 2.2-liter
diesel engine
Poor
Good
0 200 400 600 800 1,000 1,200 1,6001,400
Brake specific fuel consumption (g/kwh)
Load (BMEP)
* The 15% improvement in fuel effi-
ciency and torque was calculated
by comparing SKYACTIV-G to Mazda’s
current gasoline engine. Compres-
sion ratio, fuel economy and torque
vary accord ing to market, carline
and transmission.
SPECIAL FEATURE
SKYACTIV-G
SKYACTIV-D
16 Mazda Annual Report 201 1