Method for controlling and reducing thermal load of internal combustion engine e.g. diesel engine of motor car, involves reducing air ratio when temperature of cylinder head exceeds predetermined upper limit temperature

摘要

The method involves providing a cylinder head (6) with a cylinder (3), and determining temperature of the cylinder head by a sensor unit (16). Air ratio is reduced when the temperature (Tcyl) of the cylinder head exceeds predetermined upper limit temperature based on stoichiometric operation of a combustion engine (1). The air ratio is increased when the temperature of the cylinder head falls below of predetermined lower limit temperature based on under-stoichiometric operation of the combustion engine. The combustion engine is equipped with a liquid cooling unit (12).