| 主权项 |
1. A method to detect and control detonation phenomena in an internal combustion engine (1) provided with a number of cylinders (2) and with at least two detonation sensors (18), in particular two accelerometers (18*, 18**); the method comprising the steps of:
acquiring the signal (S*, S**) coming from each detonation sensor (18); processing the signal (S*, S**) coming from each detonation sensor (18) so as to determine a detonation energy (Sel*, Sel**) for each detonation sensor (18); determining a first indicator (α) for each detonation sensor (18) as a function of the cylinder (2) and of the engine point that is being explored, univocally identified by the revolutions per minute (rpm) and by the load; wherein the first indicator (α) is variable as a function of the observability of the detonation phenomena for each detonation sensor (18); defining a second global indicator (β) of observability of the combustion at a given engine point for a cylinder (2), in which the combustion can be fully observable by means of both detonation sensors (18) or by means of a preferred detonation sensor (18), or partially observable by means of the two detonation sensors (18) or not observable by any of the detonation sensors (18); and controlling the ignition advance implemented for the cylinder (2) in the next combustion cycle, as a function of the second global indicator (β) of observability of the combustion at the given engine point for the cylinder (2). |
