Method and apparatus for controlling a control variable of a powertrain system

摘要

A powertrain system is described, including a method for controlling a control variable for an element thereof. The method includes determining an initial state transition threshold and an associated hysteresis band for an operating parameter related to the control variable. The hysteresis band is decayed based upon operation in a present state of the control variable for powertrain element, and a preferred control variable for the powertrain element is selected based upon a comparison of the operating parameter and the initial state transition threshold accounting for the decayed hysteresis band for the operating parameter. The element of the powertrain system is controlled to the preferred state for the control variable.

主权项

1. A method for controlling a control variable for an element of a powertrain system, the method comprising:
determining an initial state transition threshold and an associated hysteresis band for an operating parameter related to the control variable; decaying the hysteresis band for the operating parameter based upon operation of the element of the powertrain system in a present state of the control variable; selecting a preferred state for the control variable of the element of the powertrain system based upon a comparison of the operating parameter and the initial state transition threshold combined with the decayed hysteresis band for the operating parameter; and controlling the element of the powertrain system to the preferred state for the control variable based upon the comparison of the operating parameter and the initial state transition threshold combined with the decayed hysteresis band for the operating parameter.