Abstract: A method for cleaning particle filters in exhaust gas systems of combustion engines, in particular diesel engines in vehicles. In order to clean a particle filter, a noncombustible, ash-free cleaning fluid is sprayed into the particle filter at high pressure by a spray nozzle, across an area of said filter through which the exhaust gas flows during the operation of the combustion engine, in a quantity such that the interior of the particle filter is substantially completely soaked. Also provided is an apparatus for carrying out the method, which includes a container containing, under pressure, the fluid to be injected into the particle filter to be cleaned, an outlet valve, and a spray nozzle, which can be connected to the outlet valve via a hose and can be inserted into a space in the exhaust gas system situated before or after the particle filter.

Abstract: The invention relates to a method for cleaning coked cavities, in particular inlet, channels (10) and valves (15) of an internal combustion engine (12), comprising the following steps: introducing an alkaline liquid into a cavity to be cleaned; heating the alkaline liquid; and extracting the alkaline liquid and the dirt particles contained therein by suction from the cavity. Said method can be carried out especially simply and effectively using a device comprising a first probe (21), which is provided at the leading end thereof with one or more nozzles (23) for injecting an alkaline liquid into the cavity to be cleaned and which is connected at the other end thereof to the delivery side (24) of a pump (25), wherein warmed alkaline liquid can be supplied to the intake side (26) of said pump. A second probe (22) is provided for extracting the alkaline fluid and the dirt particles contained therein by suction from the cavity.

Abstract: A friction and abrasion controlling additive for friction coating mixtures, especially for the formation of brake pad materials is provided which utilizes TiS.sub.2 as the additive.