CO₂-Lighthouse Diesel Engine from Volkswagen Group Research

Autoren

Dr. Aiko Mork, Christian Heimermann, Martin Schüttenhelm, Michael Frambourg, Dr. Michael Henn, Dr. Tobias Lösche-ter Horst,
Volkswagen Group Research, Wolfsburg

Zusammenfassung

A major aim of Diesel engine research is to identify key technologies for a further significant reduction in CO₂ and NOₓ compared with current production vehicles. To this end, the individual potential technologies, as well as a package of comprehensive technology measures, are being examined in multiple different relevant test cycles and verified under RDE testing conditions on engine test beds as well as integrated into vehicles. A three-cylinder research engine with 1.5 litres of displacement and a power output of 77 kW installed in a Golf VII is serving as a basis for this project. The engine is equipped with a new combustion-chamber geometry, a variable valve train on both the intake and exhaust side as well as with extensive friction-reduction measures and a variable cooling circuit. The injection system allows a rail pressure of up to 3000 bar. Further benefits are contributed by a 48 V electric compressor and a 48 V mild hybrid system (P2). The potential achieved in CO₂ reduction adds up to 31 percent relative to the 1.6-litre TDI production engine. Based on the “all-in”-approach, a cost-optimised version has also been derived with the objective of improving the cost/benefit ratio.

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