Measures to Reduce Fuel Consumption and Emissions for the New BMW Diesel Generation

Authors

Wolfgang Stütz, Johannes Dworschak, Josef Honeder, Peter Staub, BMW Motoren GmbH, Steyr

Year

2007

Summary

To meet growing requirements in the coming years BMW has developed and introduced to market a completely new 2.0 l four cylinder diesel engine. The main objective during development was a marked decrease in fuel consumption whilst at the same time increasing the driving dynamics and complying with all current and future legislative requirements. Apart from the array of friction reducing measures such as rolling bearings for the balancer shafts, the newly designed combustion process with ceramic glow plugs and new control algorithms allows for a very efficient fuel conversion with low raw emissions. The power spectrum of the engine begins at 105 kW and extends up to a two stage twin turbo charged version with 150 kW. Vehicles equipped with the new engine achieve the EU4 emissions standard and have the potential to achieve the EU5 standard. Together with additional fuel-consumption reducing measures in the vehicle and the implementation of hybrid systems such as automatic start stop, it was possible to dramatically sink fuel consumption compared to that of the previous model years. Coupled with the increases in power and torque this clearly underlines the BMW philosophy of “Efficient Dynamics”.

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