Reducing CO_2 emissions by way of injection lubrication on manual gearboxes MLxx2

摘要

In the course of developing MLxx2 gearbox modules, a number of measures were implemented to enhance efficiency compared to the predecessor gearbox ML311. Initially, the new gearbox also employed immersion lubrication. To further reduce CO_2 emissions, we developed an injection lubrication system that entered series production in August 2017. All measures taken together reduced the degree of loss in the WLTP from a full 12% to about 8.5% compared to the predecessor gearbox ML311. The actual injection lubrication, which is the primary subject of this article, reduced CO_2 emissions in the Audi A4/A5 by between 1.2 and 1.6 g/km.