The New 1.2 l Turbo Engine for the Opel Astra: The 3rd Generation of 3-Cylinder Engines

Autoren

Dr.-Ing. Matthias Alt, Dipl.-Ing. Jan Sporleder, Dipl.-Ing. Klaus Thiele, Dipl.-Ing. Guido Hartmann, Dipl.-Ing. Arno Noe, Dipl.-Ing. Waldemar Schlidt, Opel Automobile GmbH, Rüsselsheim;
Dipl.-Ing. Kendell Fulton, General Motors, Warren, USA

Zusammenfassung

Opel and General Motors (GM) have launched 2 successful generations of 3-cylinder engines. With the knowledge of more than 20 years of 3-cylinder work, Opel and General Motors have developed an all new engine family of 3-cylinder engines to be even more efficient and to create more fun to drive while being ready for electrification. Stateof-the-art technologies such as central direct injection, variable valve timing, a lightweight aluminium cylinder-block and a two-stage variable oil pump but also a combustion chamber optimization are key efficiency enablers. These engines are not only climate-friendly, they also represent a new benchmark for refinement for 3-cylinder engines. To exceed market requirements in all global markets, this new engine family is setup with the principle of a set of building bricks, so that different component sets can deliver the best solution for the individual market including electrification. The new engine family will explore further markets as North and South America.

The intent of this paper is to review the European Market version of this engine family in the Opel Astra. It features a displacement of 1.2 l and more fun to drive with 145 hp and 225 Nm while reducing the CO2 in this vehicle significantly. This is going along with a weight reduction of the engine down to 94 kg (DIN). This generation of engines will be showing once more that there is still potential in the development of the internal combustion engine.

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