Patent ID: 7212900

Claim:
A method of reducing resonance phenomena in a transmission train ( 6 ) of a vehicle internal combustion engine ( 2 ); the internal combustion engine ( 2 ) having a number of cylinders ( 5 ) normally controlled in a standard control mode to generate a drive torque (T), which has a standard pulsating pattern as a function of the engine angle (α), and has at least one disturbance harmonic component (C 4 ); the transmission train ( 6 ) having an intrinsic resonance mode having a given resonance frequency (Fr); and the method providing for modifying the standard control mode of the cylinders ( 5 ) to modify the standard pattern of the drive torque (T) as a function of the engine angle (α), and so modify the distribution of the harmonic components (C) of the drive torque (T) to reduce the amplitude of the disturbance harmonic component (C 4 ) when the rotation speed (N) of at least part of the transmission train ( 6 ) is such that the frequency of the disturbance harmonic component (C 4 ) of the drive torque (T) lies in the neighbourhood of the resonance frequency (Fr) of the transmission train ( 6 ).