A system (200) for use in evaluating an operation of a combustion engine (205) including a flame sensor (235). The system includes a memory device (110) and a processor (115) coupled in communication with the memory device. The memory device is configured ...

The method involves storing sample signals of flame light signals in a database, where the flame light signal, particularly the flame intensity of the combustion in the combustion chamber is detected and is compared with the stored sample signals. An evalu...