Monitoring pollutant emissions from a vehicle engine comprises measuring one pollutant and producing an error signal when the pollutant measured value exceeds a predetermined threshold value

摘要

Monitoring the pollutant emissions from a vehicle engine comprises measuring one pollutant and producing an error signal when the pollutant measured value exceeds a predetermined threshold value. An Independent claim is also included for an apparatus for monitoring the pollutant emissions from a vehicle engine comprising a pollutant sensor (24,26) arranged in the exhaust pipe (8), and a control device (13) that triggers an alarm (28) when the starting signal of a pollutant sensor exceeds the predetermined threshold value.