Pre converter for internal combustion engine exhaust catalytic converter - has a hollow cylindrical catalyst support body with by=pass pipe to main converter and is highly efficient over short journeys

摘要

Catalytic converter, partic. pre-converter, for an internal combustion engine has a hollow cylindrical catalyst support body (12) in a housing (11). A valve cylinder (2) can divert the exhaust stream from the body to a by-pass pipe (17) after the main converter has reached operating temp. The gas passing through by-pass continuously heats the pre-converter body. ADVANTAGE - Highly efficiency over short journeys.