Kiyoshi Fujiwara Senior Managing Director Mazda Motor Corporation
Sustainable Zoom-Zoom 2030 At Mazda, we see it as our mission to bring about a beautiful earth and to enrich people’s lives as well as society. We will continue to seek ways to inspire people through the value found in cars
People
Earth
Society Mazda Motor Corporation│ 2
Mazda’s Approach to Issues Facing the Earth
Approach CO2 reduction from a well-to-wheel perspective to reduce CO2 emissions throughout the vehicle’s life cycle
CO2
CO2
CO2
Combustion engine
Refinery
Tank
Wheel
CO2
Oil Well EV/PHEV
E
Power generation
Tank
Wheel
Material manufacture, assembly, disposal
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Forecast Expansion of Environmental Technologies
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Launch plan for next-generation technologies (CY)
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Next-Generation Gasoline Engine SKYACTIV-X
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Road Map to Ideal Combustion
Old Generation
World highest
World lowest CR
Higher CR
CR More homogeneous
Lean CI
Better mixing
Partial Premixing combustion TDC combustion
Thermal manage ment Miller cycle
Lean CI
Friction reduction
Friction reduction
Adiabatic
Lower temp. Adiabatic
Friction reduction
Friction reduction
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Features of SKYACTIV-X
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Next-Generation Gasoline Engine SKYACTIV-X
SKYACTIV-X A gasoline engine using compression ignition Fuel Type：Gasoline Combustion Method：Diesel
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Features of SKYACTIV-X
C u s to m e r V a lu e
Gasoline Engine
Next-Gen Engine
Diesel Engine
Fuel economy
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Torque
▲
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Response
▲
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Output (expansion)
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Heating
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Exhaust purification
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Difference between SI and HCCI Spark Ignition (SI)
Homogeneous Charge Compression Ignition (HCCI)
High temperature・ High compression
Ignition by plug Combust by flame propagation Air/Fuel＝Const.
Compression ignition Combust at multiple points Air>>Fuel ：leaner
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Why is Compression Ignition Significant? SI Combustion
Ordinary SI combustion@750rpm: air fuel ratio of 14.7:1
Aiming to improve fuel economy with spark ignition, we try to achieve lean combustion.
Challenge: Lean, spark ignition combustion : air fuel ratio of 29.4:1
But if we increase the amount of air or gas
the flame will not propagate
CI Combustion
@750rpm : air fuel ratio of 36.8:1
Even lean air/fuel mixtures will ignite and burn in many places simultaneously if highly compressed
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Why is Compression Ignition Significant? ＜
＞
High combustion pressure
Burns out in short time
Takes time for flame to propagate
TDC
Top dead center
BDC
下死 点
Bottom dead center
Top dead center ≒ ignition to start
Finish burning by CI
Finish burning by SI
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Issues with Conventional HCCI Other OEMs/research institute
) a P k ( d a lo e in g n E
SI（spark ignition）
Switch Switch
HCCI
Misfire due to insufficient time
Switch
Engine RPM
Compression Ignition
Data under development as Aug. 2017
Spark Ignition
Very difficult to achieve stable switching Mazda Motor Corporation│ 16
Breakthrough
Breakthrough Point （Mazda srcinal technology ）
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Technique to completely control the switch between combustion types and expand the operating region of compression ignition
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Breakthrough
‘CCI’ is our target for ideal combustion CCI（Controlled Compression Ignition ）
Use spark plug as a control factor Mazda Motor Corporation│ 19
Breakthrough ＜Compression ignition using spark plug as control factor＞ Additional Compression Expanding fire ball =Air Piston
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SPCCI Combustion
“SPCCI” （Spark Controlled Compression Ignition ）
CI combustion
Expanding fire ball (Air piston)
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Air Supply Unit
Highly responsive air supply unit
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Air Supply Unit
EGR
空気
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SPCCI Combustion ＜ Spark Controlled Compression Ignition is seamless over a wide region ＞
] a P k [ d a o l e in g n E
HCCI （圧縮着火）
Engine speed（rpm）
Data under development as Aug. 2017
wide range of rpms and engine loads switching between HCCI and SI Mazda Motor Corporation│ 24
Value Provided
Value Provided by SKYACTIV-X Ⅰ Performance Ⅱ Fuel Economy Ⅲ Driving pleasure that comes from the combination of performance & efficiency
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Value Provided
Ⅰ Performance
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① Responsiveness (launch response) ＜Improved launch response to throttle pedal operation＞ Accelerator position
〈Conventional〉
〈SKYACTIV-X〉
GE SKYACTIV-X o n it a r e l e c c A
DE(1.5L)
GE(2.0L)
Throttle valve (Initial position)
DE Initial response
Intake air enters cylinders without delay thanks to low resistance of throttle valve, providing good launch response
Time
Data under development as Aug. 2017 Mazda Motor Corporation│
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① Responsiveness (launch response) Initial vehicle response when accelerating from 40 km/h Good launch response essential for responsive driving
SKYACTIV-X
Competitors Downsizing Turbo
0.5 1.0 s s
0.5 1.0 s s
1.5 s
1.5 s
2.0 s
2.0 s
2.5 s
2.5 s
3.0 s
3.0 s
1.7m
Data under development as Aug. 2017 Mazda Motor Corporation│
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Value Provided
Ⅰ Performance ②
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Expansive at High RPM Acceleration characteristics
Acceleration continues and expands to high RPM n o ti a r e l e c c a f o e t a R
SKYACTIV-X SKYACTIV-D
Time
Data under development as Aug. 2017 CONFIDENTIAL
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Power Output 91RON
95RON SKYACTIV-X
0 2
0 2
] m N [ u e q r o T
Current SKYACTIV-G
Old MZR
0
1000 2000 3000 4000 5000 6000 Engine speed [rpm]
] m N [
SKYACTIV-X
Current SKYACTIV-G
u e rq o T
Old MZR
0
1000 2000 3000 4000 5000 6000 Engine speed [rpm]
Data under development as Aug. 2017 Mazda Motor Corporation│
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Value Provided
Ⅱ Fuel Economy ①
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Drastic improvement in fuel consumption rate
@2000rpm Old MZR ] h W k / g [ )C F S (B io t a r E F
Current SKYACTIV-G
SKYAVTIV-D Upgrade
0
200
400 600 800 1000 Engine load (BMEP) [kPa]
Data under development as Aug. 2017
1200
1400
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Value Provided
Ⅱ Fuel Economy ②
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② Flat Fuel Consumption Curve
〈SKYACTIV-X〉
〈Conventional Engine〉
] m
] m
[N e u rq o T
e u q r o T
[N
[rpm]
[rpm]
Data under development as Aug. 2017 Mazda Motor Corporation│
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Value Provided
pleasure comes from the Ⅲ Driving combination ofthat performance & efficiency
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Ⅲ Driving pleasure 〈SKYACTIV-X〉
〈Conventional Engine〉
6th FGR：BASE
] m [N e u rq o T
6th FGR：BASE
] m [N
e u q r o T
a b
6th FGR：Lower speed （Prioritize driving）
[rpm]
a b
6th FGR：Lower speed （Prioritize driving）
[rpm]
Data under development as Aug. 2017 Mazda Motor Corporation│
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Ⅲ Driving pleasure
> y m o n o c e l e u F <
Gear ratio Good fuel economy
Good driving
Data under development as Aug. 2017 Mazda Motor Corporation│
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Ⅲ Driving pleasure
] m k / g [ 2 O C P T L W
2.5
European 1.5L Downsizing turbo w/ cylinder deactivation
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
Good launch - Acceleration from 40km/h [m/3 seconds] 40km/h→Acceleration
Data under development as Aug. 2017
Acceleration position
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Feedback on SKYACTIV-G and Upgrade SKYACTIV-G
SKYACTIV-G
1.0L 1.4L T
Data under development as Aug. 2017
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Feedback on SKYACTIV-G and Upgrade
SAE 2016-01-1007: SAE 2016-01-0565:
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Product Strategy ~ Enhance SKYACTIV Lineup
SKYACTIV-X
Gasoline engine lineup
Diesel engine lineup Mazda Motor Corporation│43
Building Block Strategy and Process Innovation Provide unique, world-leading products with the most appropriate technologies for each market Process Innovation ・Monotsukuri Innovation (Common Architecture & Flexible Production)
