Abstract
With BMW providing leadership, the BMW Group and PSA have developed a new series of small petrol engines. For both partners, the new engines are a significant improvement in the task of reducing CO2 emissions. A fully variable valve drive and the combination of direct injection with turbocharging by means of a twin scroll turbocharger are being used for the first time in this vehicle class. A volume-controlled oil pump, a mechanical on-demand water pump and consistent frictional power optimisation make a considerable contribution towards achieving a generous torque characteristic and good specific fuel consumption in all variants.
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