Patent ID: 8938352
Filing Date: 2015-01-20
Classification: B60W,B60Y,F02D

Abstract:
1. A method for controlling a cruise control governor operable to maintain a set speed of a vehicle by commanding fueling to an engine of the vehicle according to a plurality of goal droop curves, where the goal droop curves comprise: an isochronous droop curve which coincides with the set speed and is bounded by a first point below a full torque curve of the engine and by a second point above a zero torque curve of the engine; a top droop curve which is bounded by the first point and by a third point on the full torque curve; a bottom droop curve which is bounded by the second point and by a fourth point on the zero torque curve, the method comprising the steps of: if the downshift is estimated to occur then performing a fuel saving action during the time period in order to avoid the downshift, where the fuel saving action being to during the time period performing command according to a second isochronous curve instead of performing command according to at least one of or both of the top and bottom droop curves.