Mazda To Launch Petrol Engine With Diesel Economy

2017 Mazda3

Mazda's method for making this combustion process work for a petrol engine is to maximise the zone in which compression ignition is possible and to retain the spark plugs, thereby enabling "a seamless transition between compression ignition and spark ignition", as Mazda puts it.

Mazda has detailed the next-generation of its SkyActiv engine family, which will feature innovative compression ignition technology. Infiniti unveiled a variable compression ratio engine past year, and hybrid technology is getting smarter, but Mazda has a different solution.

At the core of Mazda's upcoming range of engines is technology called Spark Controlled Compression Ignition. They use compression ignition technology that has previously only been used in diesel engines. According to the company, the technology is an evolution of the ultra-high compression ratio being used in its current range of engines.

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The system combines fuel and air in the engine's cylinder similar to a regular spark ignition engine. This, in turn, allows Mazda to run with a much leaner air-fuel mix for better fuel consumption and lower emissions. SkyActiv-X will avoid the issue by operating as a conventional, spark plug-ignited engine when conditions demand it.

The company says their efficiency will be 20 to 30 percent better than its current SkyActiv engines, launched in 2012.

Mazda has announced its next-generation petrol engines will utilise technology more commonly found in diesels to improve economy and emissions.

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The new Skyactiv-X engines will also come fitted with a supercharger for an increased torque by 10 to 30 percent when compared to today's Skyactiv-G engines.

The new engines are part of Mazda's long-term strategy to create a more eco-friendly product range known as the Sustainable Zoom-Zoom 2030 initiative.

Mazda said this will enable Skyactiv-X engines to produce lower carbon dioxide emissions than electric drivetrains from a "well-to-wheel" perspective - which accounts for the whole life cycle of a vehicle and the fuel needed to power it.

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"We think it is an imperative and fundamental job for us to pursue the ideal internal combustion engine", said Mazda's head of R&D Kiyoshi Fujiwara.

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