Exhaust Gas Treatment

Our valves control the flow of additional air to the exhaust system which supports catalytic converter heating. Modern catalytic converters reach their operating temperature at approximately 200 °C. During the warm-up phase, engines are operated with excess fuel to ensure smooth running and prevent misfiring.  The excess fuel can be used to reach the operating temperature of the catalytic converter more quickly. This is done by introducing air, so that hydrocarbons in the catalytic converter can react exothermically and contribute to faster heating. This helps to reduce emissions when starting the vehicle.