Management system for IC engine has sensor outlets checked against a first level for likely failures and checked against a second level for potential failures

摘要

A management system for an IC engine has the output signal (S) from a sensor passed to a checking stage (110) to compare with a first failure level (W1). Any signals in excess are checked in a second stage (130) against a second failure level to determine potential failures. The first level is set to be unacceptable in all conditions while the second level is unacceptable in certain conditions. The signal can be a combined signal from several sensors.