The New Generation of the Medium Four Cylinder – Spark Ignition Engines by FIAT-GM Powertrain

Authors

Dr.-Ing. U.-D. Grebe, Dr.-Ing. P. Gebhard, Dipl.-Ing. T. Löhnert, Dipl.-Ing. I. Opacak, Dipl.-Ing. H. G. Theis, Opel Powertrain GmbH, Rüsselsheim

Year

2003

Print Info

Fortschritt-Berichte VDI, Reihe 12, Nr. 539

Summary

The medium size gasoline engine family by FIAT-GM Powertrain, internally called Family 1, was redesigned with regard to fuel consumption, quality, maintenance and manufacturing cost. Next to the optimizations the refinement focused on modular use of components. The 1.6 l engine has the biggest production share and is the first variant of the new third generation of this engine family. The engine is using tappets with mechanical lash adjustment and a thermomanagement system. Next to the power output of 76 kW and the maximum torque of 147 Nm the development included the integration of a combustion system with port reactivation and high amounts of recirculated exhaust gas. This reduced the fuel consumption significantly. The new engine will be used in the Opel Astra first. The fuel consumption in the European MVEG test cycle is reduced by 7 % from 7.0 to 6.5 l/100km. This positions the vehicle in the upper segment. Alternative solutions use much more complex measures such as stratified charge gasoline direct injection to achieve comparable fuel consumptions. The described cost efficient system combines best customer benefit in terms of fuel consumption and vehicle performance with optimized manufacturing cost and excellent longterm reliability. This engine concept using modular components creates a platform for the medium four-cylinder gasoline engine family. This platform will be the basis for the entire redesigned engine family applying different combinations of the modules.

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