Engine Misfire Detection for Intermittent and Singular Events

The patent applies dynamics by making the detection method adaptive to different operating conditions and misfire types. The control unit dynamically adjusts detection parameters and thresholds based on engine operating state, enabling it to detect continuous, intermittent, and singular misfires that static methods cannot identify. This dynamic approach resolves the contradiction by allowing the system to maintain high reliability across varying conditions while expanding detection versatility.

The patent utilizes parameter changes by monitoring multiple engine parameters (torque, speed, intake manifold pressure, exhaust pressure) simultaneously and analyzing their variations to detect different misfire types. By changing and comparing multiple parameters rather than relying on a single fixed threshold, the system can identify intermittent and singular misfires while maintaining continuous detection capability, thus resolving the technical contradiction.

The patent applies universality by making existing multi-functional engine sensors serve the additional purpose of misfire detection. The control unit repurposes sensors already present for other engine control functions (torque sensors for power management, speed sensors for RPM control, pressure sensors for fuel injection timing) to also detect misfire conditions. This eliminates the need for dedicated misfire sensors, maintaining high detection precision while avoiding increased device complexity.

The system applies self-service by using the engine's own existing sensor network to perform misfire detection without requiring external or additional measurement equipment. The control unit processes data from sensors already installed for engine operation, making the system self-sufficient for misfire detection and avoiding the complexity of adding specialized detection hardware.

The patent applies partial action by implementing a two-stage detection process: continuous monitoring of basic parameters with simplified thresholds for rapid assessment, followed by more comprehensive analysis only when initial indicators suggest potential misfire. This allows the system to maintain high detection reliability through continuous oversight while reducing computational load by performing intensive processing only when necessary, thus minimizing processing time loss.

The system applies preliminary action by pre-calculating and storing threshold values and detection criteria for different operating conditions before actual misfire detection begins. The control unit prepares detection parameters in advance based on expected engine states, so when real-time data arrives, comparison and decision-making can occur rapidly without extensive real-time computation, maintaining continuous detection reliability while reducing processing time.