A method for avoiding thermally critical states of a exhaust gas after treatment before the direction for an internal combustion engine

摘要

Actual temp. of the exhaust gas is measured and compared with a desired value corresp. to correct operation of the ignition system in all cylinders. The absolute value of any discrepancy is assessed as well as its rate of change. Audible and visual warnings are given when e.g. excessive temp. is detected, and a faulty cylinder may be taken out of service to reduce the exhaust temp. to a safe level. ADVANTAGE - Any malfunction of ignition can be detected and remedied easily and reliably without risk to catalytic convertor.