A DIAGNOSTIC APPARATUS AND METHOD FOR A COMBUSTION SENSOR FEEDBACK SYSTEM

摘要

An apparatus for determining if a combustion condition in a combustion chamber (20) of an internal combustion engine (10) occurred includes a combustion sensor (26) for sensing the occurrence of the combustion condition in the combustion chamber (20) and producing a combustion signal responsive to the combustion condition, a temperature sensor (30) for sensing a temperature condition in an exhaust passage (28) from the combustion chamber (20) and producing a temperature signal having a characteristic indicative of the sensed temperature condition, and a controller (34) connected for receiving the combustion signal and the temperature signal and operable in the absence of receipt of an expected combustion signal to determine if the combustion condition occurred by comparing the temperature signal characteristic with a predetermined characteristic value indicative of the occurrence of the combustion condition in the combustion chamber (20).