Diagnostic system for engine

A method for the diagnosing an operation of a combustion condition sensor used within an engine that defines a combustion chamber for combusting air/fuel mixtures and a fuel supply system for supplying fuel for the air/fuel mixtures, the method comprising setting a first fuel amount of fuel supplied to the combustion chamber, adjusting the fuel amount, and determining an output value of the combustion condition sensor.

A diagnostic system for diagnosing a combustion condition sensor, comprising a controller configured to control at least one operational characteristic of an engine which defines at least one combustion chamber configured for combustion of an air/fuel mixture therein, the controller being configured to determine an output value of the combustion condition sensor and to compare the output value to a predetermined value.

A diagnostic system for diagnosing a combustion condition sensor, comprising a controller configured to control a fuel supply system of an engine which defines at least one combustion chamber configured for combustion of an air/fuel mixture therein, the controller being configured to control the fuel supply system so as to create at least one of a lean air/fuel mixture and a rich air/fuel mixture in the combustion chamber, adjust the air/fuel mixture, and determine a time required for the combustion condition sensor to switch from a first output value to a second output value.

A diagnostic system for diagnosing a combustion condition sensor, comprising a controller configured to control at least one operational characteristic of the engine which defines at least one combustion chamber configured for combustion of an air fuel mixture therein, the controller being configured to determine an output value of the combustion condition sensor and means for comparing the output value to a predetermined value.