Patent ID: 6336070
Filing Date: 2002-01-01
Classification: B60K,B60W,F02D,G01L,G05B,Y02T

Abstract:
A control system for a powerplant that comprises a combustion engine including a rotating crankshaft that delivers output torque and a dynamoelectric machine arranged for interaction with the combustion engine to modify the output torque delivered by the crankshaft, the control system comprising:a processor for developing data for controlling the combustion engine and the dynamoelectric machine, including an observer for developing observed data that comprises estimated engine output torque represented as an estimated average value torque component on which is superimposed an estimated alternating polarity ripple torque component whose mean value over a time interval of interest is substantially zero; the observer comprising an engine model that models operation of the engine and a filter model developing the estimated alternating polarity ripple torque component from the estimated engine output torque, and a dynamoelectric machine model modeling the dynamoelectric machine; the processor operating to process data through the engine model to develop estimated torque contribution due to engine operation; the processor further operating to process data through the filter model to develop the estimated alternating polarity ripple torque component, to process the estimated alternating polarity ripple torque component through the dynamoelectric machine model to develop estimated dynamoelectric machine torque output, and to develop, from the estimated alternating polarity ripple torque component, dynamoelectric machine torque data representing torque that the dynamoelectric machine is commanded to deliver to substantially cancel, from output torque delivered by the crankshaft, the engine-induced ripple torque, resulting in crankshaft torque that has substantially zero mean value RMS dynamic content over a time interval of interest.