Mercedes fitting a particulate filter in its petrol engines


New particulate filter Mercedes-Benz for petrol engines.

After more than two years of experience in the S-Class 500, in 2017, the petrol versions of the S-Class Facelift debut the new engines M256 and M176 which will be equipped with this new filter, an item that will be incorporated progressively in the versions of this fuel models are completely new, facelifts and new generations of engines, including the new gasoline engine M264 four-cylinder Turbo.

The filter particles from gasoline engines reduces emissions of fine particles, or soot, working in a way similar to the technology of the diesel, in which the exhaust gas stream arrives at a system of particle filter, which in the new S-Class will be located under the floor of the vehicle.

The filter with a honeycomb structure with input and output channels are alternately sealed, to force the exhaust gas to flow through a wall filter porous that traps the soot. The filter can be regenerated continuously under driving conditions determined.


M256, new engine six-cylinder in-line Mercedes-Benz.

While Mercedes used particle filters, ceramic, silicon carbide (SiC) in their diesel technology particulate filter for gasoline engines is based on the cordierite, a material of ciclosilicato of iron and of magnesium that is more tolerant to the higher temperatures reached in an exhaust system of gasoline, burning the particles each time that there is excess oxygen in the exhaust stream, what tends to happen each time you lift the throttle.

This new filter doesn’t need maintenance throughout the life of the vehicle, it is optimized for the backpressure added (only 1.7 to 1.9 psi) has a high filtration efficiency and is self-regulating.