The catalyzed diesel engine is characterized by reduced smoke production and reduced carbon content in the exhaust gases. The old turbodiesel engine is installed as the base engine.
The turbocharger provides a high excess of air. As a result, the fuel burns better than in a conventional diesel engine, resulting in a noticeable reduction in smoke.
Reduced smoke generation makes it possible to use an oxidizing catalyst, which is located under the bottom of the car in the exhaust gas path instead of a pre-muffler. As with gasoline engines, the catalyst consists of honeycomb monoliths with a platinum-rhodium coating. When flowing through the catalyst, more than half of the environmentally harmful carbon compounds contained in the exhaust gases are burned. In addition, the smell characteristic of diesel engine exhaust gases is reduced. Lambda regulation by means of a lambda probe, as on petrol engines, is not available on diesel engines.