Pistons account for up to 17% of all losses from friction of internal combustion engines. The manufacturer of power units Federal-Mogul announced the creation of two types of coatings of a new generation, reducing friction by 14% compared to conventional materials.
Engineers have long been trying to overcome losses in the friction of pistons and pins by optimizing the geometry of the piston clearance and using improved materials of the walls of the cylinders and piston skirts. According to representatives of Federal-Mogul, their EcoTough coatings for all types of engines will reduce wear of these parts by 40%.
The coating consists of a polymer, which includes metal oxide and reinforced microparticles of solid lubricant. The thickness of the layer is only 16 microns, which in the end reduces friction by 14%.
The material for diesel engines is called EcoTough-D and is designed for pistons of cars of all classes. It is also based on a polymer reinforced with short carbon fibers with graphite additions as a solid lubricant. This reduces the friction of the pistons by 35% and increases the wear resistance by 30%. Exit coatings on the market is planned for next year.