Not all vehicle emissions come out of the tailpipe. Brakes and tires account for 32 percent of driving-related particulate emissions, half of which is brake dust, according to German environmental officials. Now, Buderus Guss, a subsidiary of automotive supplier Bosch, has devised a cleaner disc brake.
The iDisc generates up to 90 percent less brake dust than a conventional brake disc. The technology is based on a conventional cast-iron brake disc but also has a tungsten-carbide coating made exclusively by the company. To transform a conventional disc into an iDisc, the friction rings are mechanically, thermally and galvanically treated before being coated
In addition to a substantial reduction in brake dust, the carbide coating also provides greater operating safety. The braking performance is like that of a ceramic brake, especially in terms of fading – the reduction in stopping power following repeated braking maneuvers. Similar to a ceramic brake disc, the iDisc is highly stable in this respect and loses little deceleration performance.
Wear is also significantly reduced. Depending on the strength of the carbide coating, the iDisc’s service life is twice that of a normal brake disc.
The iDisc also eliminates gouging marks on the friction ring, as well as corrosion—a major advantage, especially in electric cars. Because they recover braking energy via recuperation, electric cars put less strain on the brakes and have to contend with rust formation on friction rings. The temporary slight decline in responsiveness during braking associated with this does not occur with the iDisc.