Patent ID: 7171292
Filing Date: 2007-01-30
Classification: B60W,F02B,F02D,Y02T

Abstract:
1. A system for processing vehicle powertrain torsional information, the system comprising: a vehicle powertrain having a plurality of powertrain components including an internal combustion engine and a number of downstream components driven by the engine; a speed sensor producing a speed signal indicative of rotational speed of one of the powertrain components; and a control computer determining a magnitude of an Nth-order torsional component of vehicle powertrain vibration as a function of the speed signal, the control computer executing either of a diagnostic routine relating to the Nth-order torsional component and a control routine controlling operation of the vehicle powertrain away from conditions at which the magnitude of the Nth-order torsional component exceeds a threshold magnitude if the magnitude of the Nth-order torsional component exceeds the threshold magnitude for at least a first predefined duration.