Exhaust gas decontamination device for vehicular combustion engine - exercises electronic control of relays for generator load shedding during warm=up of exhaust catalytic converter

摘要

The engine (10) drives (12) an electric generator (18) from which a first battery (30) is recharged, and vehicular electrical loads (68) are powered until a switching relay (38) energises a central relay (54) and isolates (64) a second battery (28). The switching relay (38) has a second contact (40) connecting this battery (28) to a heating element (36) of the catalytic convertor (24) in the exhaust pipe (22). The relaying is controlled (60) electronically in accordance with engine temp. (69), the lambda probe signal (26) and the converter temp. ADVANTAGE - Emission of noxious gases can be reduced in cold conditions below initiation temp. of catalytic converter.