CONTROL SYSTEM FOR AND METHOD OF CONTROLLING AN INTERNAL COMBUSTION ENGINE

摘要

A control system is provided for controlling the composition of a gas and fuel mixture supplied to an internal combustion engine (10). The output of an engine roughness detector (20, 21) (spark ignition engine) or an exhaust smoke detector (compression ignition engine) is compared (22) with a limit value from a look up table 14) and the result is supplied via a controller (23) to correct (18) the base value of mixture composition from a look up table (13) to a mixture control device (17). The amount of correction is limited by the controller (23) in accordance with a limit value from a look up table (15) so as to prevent the emission of unacceptable levels of oxides of nitrogen by the engine (10).