Procedure for detecting vibrational torque at an output member of an internal combustion engine of an automobile

摘要

A target wheel (1) attached to a crankshaft (2) has teeth (3) which enable a reluctance sensor (5) to time movements through successive 30 degree sectors ( alpha i-1) and ( alpha i). The corresponding speeds (Ni, Ni-1) are determined by the vehicle calculator and used to produce an average torque at a piston top dead centre. If this torque exceeds a threshold it is deemed due to road surface irregularity and is not taken into account in estimating misfires