Filters (Hardparts)

The optimised particulate separation efficiency of the air filter minimises the wear on pistons, piston rings and the running surface of cylinder liners. The air filter, adapted to the engine characteristics and installation space, effectively suppresses disruptive intake noises.

Cabin filters prevent foreign particles such as dust, pollen, spores and soot in the ambient air from entering the passenger compartment through the ventilation system. Cabin filters with activated carbon are not only fine filters for solid particles, they also absorb unpleasant odours and harmful gases such as nitrogen oxides, sulphur dioxide, ozone and hydrocarbons, and prevent them from entering the passenger compartment at a rate of 95 %.

Even minor impurities in the fuel system can lead to severe malfunctions. Modern injection systems, in particular, require an extremely clean, pulsation-free and homogeneous fuel supply.

Foreign bodies that get into the engine with the fuel or via the intake air and abraded metal that arises within the engine are filtered out of the oil circuit and trapped by the oil filter.

Coolant filters protect the engine cooling system by filtering out impurities. The additives in the filter are also released into the cooling system at a controlled rate.

In modern exhaust treatment systems with SCR (selective catalytic reduction) catalytic converters, urea filters filter the urea solution, thereby protecting system components against wear.