Hans-Joachim Langer

Exhaust gas system for an internal combustion engine

In an exhaust gas system for an internal combustion engine for a vehicle which includes an exhaust gas conduit with an exhaust gas cleaner and a silencer, the structure-borne noise emission is reduced by coating surface areas of the exhaust system with a silencing layer consisting of metal powder which is applied by plasma spraying or sintering.

The Regenerable Trap Oxidizer-An Emission Control Technique for Diesel Engines

The paper examines the work carried out by Daimler-Benz with the development of systems for the after-treatment of the exhaust gas emitted by diesel engines. The more important limiting conditions could best be met by the provision of a ceramic, self-cleaning trap oxidizer (to). In such filters, self-regeneration is effected continuously while driving without any external control. Either partial or complete regeneration is effected, depending on the temperature, oxygen content and rate of flow of the exhaust gas, the amount of soot in the filter and the period for which a given operating condition is maintained. Such a trap oxidizer was developed for a 3.0 liter turbocharged diesel engine to the extent necessary for series production and has been fitted to type 300 SD and 300 D turbocharged diesel of model year 1985 in California. For the covering abstract see IRRD 287303.