Mazda announces the ‘SKYACTIV-G 1.3’ direct-injection gasoline engine

Article by Christian Andrei, on May 18, 2011

As part of a strategy to cut fuel economy by 30% after five years, Mazda has detailed a brand new engine 1.3-liter gasoline direct injection that will debut in the facelifted Mazda2 (known as Domio in certain markets). The unit was recently introduced at the Pacifico Yokohama convention center near Tokyo, Japan. It features dual sequential valve timing and an ultra high compression ratio.

It was actually in 2010 that the unit was revealed but Mazda only released the complete details of this model a few weeks before it goes on sale in Japan. The SKYACTIV G 1.3 is combined with Mazda’s i-stop idling stop system.

It features a record high compression ratio of 14.0:1 and has piston cavities that are meant to support ideal combustion and multi hole injectors for precise fuel injection.

Mazda has applied for over 130 patents related to the SKYACTIV G 1.3 engine, which has an output of 82 hp at 5,400 rpm (62 kW) and 112 Nm (83 LB-FT) of torque at 4,000 rpm. However, Mazda claims that the Domio will receive about 70 mpg in Japan’s domestic market testing. The Domio’s four-cylinder engine is coupled to a CVT that will make the most of the latest technologies.

Mazda Motor Corporation announced that its SKYACTIV-G 1.3-liter petrol engine has succeeded in getting the 2012 ‘Technology of the Year’ award. This award is given each year through the highly-respected Automotive Researchers’ and Journalists Conference of Japan with its chairman Hiroshi Fukunaga. One of the main innovations presented by this engine is that it sports a lightweight design that creates more from less.

At the core of the engine is the ultra-high compression ratio at 14.0:1, the highest so far for a mass-production model. Such figures have only been previously seen inside high-performance racing engines. With the use of direct-injection, this 1.3-liter unit delivers outstanding efficiency, most especially when running at high load and low rpm. This engine also makes use of various advanced technologies made by the company for the SKYACTIV-G 2-liter engine.

This 2-liter unit has already been disclosed to be part of the engine line-ups for the CX-5 compact SUV, coming out in 2012. Since the 1.3-liter unit experiences less internal friction, it is able to offer more torque and thus results in improved fuel economy as well as reduced emissions. One of the issues that many standard high-compression petrol units face is known as “knocking”. To solve this particular problem the SKYACTIV-G 1.3 utilizes different technologies.

An example of this is the special piston cavities that have been designed in order to maintain ideal combustion. Another is the special multi-hole injectors which allow for exceptional precise control when it comes to injecting fuel to its cylinders. Scheduled to be released to the U.K. and Europe market by early next year, the Mazda CX-5 compact SUV will be the first vehicle from the company to be equipped with the complete range of advanced SKYACTIV technologies. This new vehicle is expected to combine the lower fuel consumption and CO2 emissions with the exciting Jinba Ittai driving experience the company is known for. Jinba Ittai relates to the driver and the car being one as exhibited by the MX-5 sports car.

Topics: mazda, engine

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