Mazda introduces new 1.3 liter SKYACTIV-G engine - 70 mpgs

Mazda SKYACTIV-G 1.3 liter engine 19.05.2011
Mazda SKYACTIV-G 1.3 liter engine 19.05.2011

New engine will debut in the Mazda Demio in Japan soon - sold as the Mazda2 around the world

Mazda has unveiled a new engine at the Automotive Engineering Exposition which took place at the Pacifico Yokohama convention center near Tokyo inJapan.

The new direct-injection 1.3 liter SKYACTIV-G unit comes with 84 PS/62 kW and 112 Nm of torque and features a remarkable consumption rating of just 3.3 liters/100 km (71.2 mpg US / 85.6 mpg UK). The gasoline power plant is naturally aspirated and achieves a remarkable compression ratio of 14.0:1.

SKYACTIV technology on the new power plant includes special piston cavities for more optimized combustion process and multi-hole injectors for more precise fuel mixture.

The new power plant will debut in the facelifted JDM Mazda Demio model in Japan this summer - sold as the Mazda2 around the world.

Mazda's SKYACTIV technology is a group of next-generation features for improved fuel-economy and performance that extend beyond engine tech and into transmission, body and chassis designs.

Source: Mazda

Mazda Develops Highly Efficient "SKYACTIV-G 1.3" Direct-Injection Gasoline Engine

- Mazda's innovative combustion technology significantly improves fuel economy -

HIROSHIMA, Japan-Mazda Motor Corporation has announced that the "SKYACTIV-G 1.3" direct-injection 1.3-liter gasoline engine will be the first of its next-generation SKYACTIV technologies to be introduced to the market. Mazda will unveil the engine at the Automotive Engineering Exposition that will be held from May 18 through 20, 2011, at the Pacifico Yokohama convention center near Tokyo, Japan.

The breakthrough SKYACTIV-G 1.3 achieves a record high compression ratio (for a regular gasoline mass production automobile engine) of 14.0:1 and exhibits high efficiency, especially under high load at low rpm. In order to avoid knocking - an unavoidable issue with conventional high-compression engines - the SKYACTIV-G 1.3 features a number of new technologies, such as piston cavities that are specially designed to support ideal combustion, and multi-hole injectors that enable precise fuel injection control.

Mazda plans to introduce the SKYACTIV-G 1.3 to the Japanese market in the facelifted Mazda Demio (known overseas as the Mazda2) during the first half of 2011. It will be the first ever 1.3-liter direct-injection gasoline engine to be equipped in a compact car manufactured in Japan. Combined with Mazda's unique idling stop system, i-stop, and a continuously variable transmission (CVT), SKYACTIV-G 1.3 will achieve fuel economy of 30km/L under Japan's 10-15 mode test cycle.

Mazda has applied for over 130 patents in relation to the engine (as of the end of February, 2011).

SKYACTIV TECHNOLOGY is the umbrella term for Mazda's range of next-generation technologies - including gasoline and diesel engines, transmissions, and a new body and chassis - that significantly improve vehicle driving dynamics as well as environmental and safety performance. The SKYACTIV-G 1.3 that is equipped in the facelifted Mazda Demio adopts all of Mazda's SKYACTIV engine technologies except for the exhaust manifold. It also features other new components that are exclusive to the Demio, such as a cooled EGR* system.

Under its Sustainable Zoom-Zoom vision, Mazda aims to deliver outstanding driving pleasure as well as environmental and safety performance, and is committed to increasing its global fleet fuel economy by 30 percent by 2015, compared with the 2008 level.

* EGR: Exhaust Gas Recirculation

Main features of the SKYACTIV-G 1.3 engine

  • Highly efficient automobile gasoline engine and the world's first to achieve a compression ratio of 14.0:1
  • Multi-hole injectors enable precise fuel injection control for ideal combustion
  • Mazda's first dual sequential valve timing system (dual S-VT with electronically-operated intake) in combination with the high compression ratio achieves an unconventional Miller cycle (extremely delayed closure of intake valves) that improves efficiency
  • Compact combustion chambers have a longer stroke for better efficiency
  • Piston cavities are specially designed to support ideal combustion
  • 30 percent less mechanical friction, due to a narrower crankshaft, new roller followers and low-tension piston rings that also reduce oil consumption
  • Various countermeasures to prevent knocking, including a cooled EGR system
  • An updated version of Mazda's innovative idling stop system, i-stop, improves fuel economy by eight percent. It operates with a higher frequency, requires less fuel to restart, and achieves a smoother restart
  • A lightweight and highly rigid aluminum alloy engine block

Major specifications of the SKYACTIV-G 1.3

  • Inline four-cylinder 1.3-liter direct-injection engine (with i-stop)
  • Engine displacement: 1.298?
  • Bore and stroke: 71.0mm x 82.0mm
  • Compression ratio: 14.0:1
  • Maximum output (net): 62k?@5,400rpm (84ps@5,400rpm)
  • Maximum torque (net): 112Nm@4,000rpm

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Comments (9)

madofmazda madofmazda
This is AMAZING for a gasoline car....very good movement, I don't care about any supercar or any inrational car consumption. It's very rational for daily user of a gosoline car. Can't wait for it..
May 26th, 2011 1:22pm
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raycmwan raycmwan
A compression ratio of 14.0:1, that's crazy!
May 20th, 2011 9:48am
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dasoviet dasoviet
zoom zoom
May 20th, 2011 9:17am
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afterace2 afterace2
nice achievement, hopefully it wont be a reliability nightmare as the 2.0 MZR-CD we still remeber of.
May 20th, 2011 2:11am
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Great concept, who needs turbos, or diesel
May 19th, 2011 11:56pm
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DogFalcon DogFalcon
Such high compression ratio should figured out that it preferable to use premium gasoline... Btw: astonishing mpg values. Can't wait to try. Maybe other brands may follow.
May 19th, 2011 10:47pm
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wcfuser14369 wcfuser14369
Isn't that, like 84mpg Imperial? That's exceptional! I am assuming this thing is petrol driven rather than diesel, right?
May 19th, 2011 4:30pm
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BrianWCF BrianWCF
yes, it's gasoline and 85.6 mpg imperial
May 19th, 2011 11:23pm
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Douglas6250 Douglas6250
It just shows that the Japanese could still fight the Europeans on small engines without Turbos !!
May 20th, 2011 1:32pm
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