The future of the diesel engine as a means of propulsion in passenger cars

BMW meets future mobility requirements with a dual development. In addition to the introduction of alternative drive concepts, intensive work is under way on the enhancement of more efficient combustion drives. As a CO2 avoidance concept, diesel engines play an important role here. In Europe, this drive principle has captured very high market shares in the last 20 years – at BMW, more than 75%. Diesel vehicles are also well accepted in regions outside of Europe. The opportunity as a CO2 avoidance concept, however, faces stiff challenges in the form of future exhaust emissions legislation (RDE, US SULEV). This discussion points out the relevant challenges and technological solution approaches. In addition to approaches involving internal engine measures, possible exhaust re-treatment systems, a balanced engine portfolio (right-sizing), as well as efficient electrification approaches for diesel engines will also be discussed. Different packages to effectively address the challenges of the future can be compiled from the above-mentioned technology fields. With the required development boost, future passenger car diesel engines will become ’Blue Performance’ drives over the long term.