Controller for catalyser activation for internal combustion engines can activate a catalyser rapidly when the engine is cold

摘要

The arrangement has a catalyser (13,14) in the engine exhaust gas line (3), a variable valve setting mechanism (23,24) for variable control of the open/closed setting of at least one induction valve (11) and a valve controller (30) for controlling the valve opening overlap of the induction and exhaust (12) valves to a predefined amount by controlling the variable valve setting mechanism when the engine is cold.