METHOD AND DEVICE FOR REDUCING TORSIONAL VIBRATIONS IN AN INTERNAL COMBUSTION ENGINE

摘要

The invention aims at damping torsional vibrations of an internal combustion engine, said vibrations being compensated according to the learned principle of disturbance variable compensation. To this end, a torque disturbance variable (Mz*(z)) is derived from an irregularity in engine speed (Ni). Said irregularity is detected by means of a transmission function (HD(z)) in the feedback branch (RZ) that is inverse in relation to transmission function (HI(z)) and that is formed by a controlled system (TS2) of the moment of inertia (J) of the internal combustion engine (VM) and of the starter/generator (SG). Said torque disturbance variable is then stored in a periodic memory (PS) in the form of discrete disturbance variable values (SW). A theoretical load moment (Ms(z)) is generated from a content stored in said periodic memory that is stagger read by at least one disturbance period (P). Said theoretical load moment is then fed to a field-oriented regulation system (FR) of a starter-generator (SG) for producing a load moment (MSG) compensating for a disturbance torque (Mz(z)).