Internal combustion engine with selective catalytic converter for the reduction of nitrogen oxides and method for operating an internal combustion engine of said type

摘要

An internal combustion engine comprising a turbocharger wherein a bypass line in an exhaust gas discharge system delivers an aqueous urea reductant to an at least one SCR catalyst and a method to maintain the reductant at a desired temperature to maximize its conversion to ammonia and optimize the reduction of NOx in the SCR.