A computational process where the engine control module constantly recalculates and adjusts when the spark plugs fire based on real-time sensor data. It factors in engine speed, load, temperature, and throttle position to optimize power and prevent knock. This replaces static timing where the distributor was manually set and locked into a single base position.
The dynamic ignition timing is pulling out five degrees of spark right now because the knock sensor is picking up bad gas.
When scanning live data, watch the dynamic timing advance curve under heavy load; sudden drops usually indicate the knock sensor is intervening to protect the engine.
Related terms
Ignition timing
The exact moment a spark plug fires relative to the position of the piston during the compression stroke.
Basic ignition timing
The baseline degree of crankshaft rotation at which the spark plug fires during idle.
Computer-controlled timing
An ignition system where an electronic control unit determines exactly when to fire the spark plugs.
ECU
The primary computer that manages engine performance, fuel delivery and emissions.
Knock
An abnormal and damaging combustion event where the air-fuel mixture self-ignites prematurely.