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30-11-2018 | Engine Technology | News | Article

Compression-Ignition Petrol Engine Goes into Production in Mazda3

Patrick Schäfer

Mazda has unveiled the new Mazda3 at the Los Angeles Auto Show. The Skyactiv-X engine is particularly interesting as it is the first production petrol engine with homogeneous charge compression ignition.

The body of the new Mazda3 adopts a matured Kodo design. Clear surfaces dominate: the large radiator grille at the front is flanked by narrow headlamps, while the rear with its wide C-pillar looks somewhat chubby. The C-segment vehicle is based on the newly developed Skyactiv-Vehicle Architecture and debuts as a five-door and four-door fastback.

The new Mazda3 is the first production vehicle with the 2.0-l Skyactiv-X petrol engine. Similar to a diesel engine, it works with excess air and compression ignition. With a HCCI (homogeneous charge compression ignition) engine, the homogeneous lean fuel-air mixture auto-ignites when compressed in the combustion chamber – like a diesel engine. Similar to the other engines, the engine is coupled to the M-Hybrid system. For petrol engines, this is a 2.0-l Skyactiv-G, and for diesel engines the new 1.8-l Skyactiv-D.

Mazda3 with new assistance systems

The new driver assistance systems include the radar-based Front Cross Traffic Alert (FCTA), which is designed to reduce the risk of accidents at T-junctions; the semi-autonomous Cruising & Traffic Support (CTS) system, which can independently accelerate, steer and brake on motorway journeys; and a driver monitoring system. The new Mazda3 will be launched in March 2019.

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