Hybrid road grade determination system
AssigneeGM Global Technology Operations LLC
InventorsMark A. Zerbini, Goro Tamai
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Abstract
A method of regulating operation of a hybrid vehicle traveling on a surface having a grade includes determining a drive force of the hybrid vehicle, calculating a brake pressure value and determining whether a grade freeze condition exists based on the brake pressure value. The method further includes calculating a grade value of the surface based on the drive force when the freeze condition does not exist and regulating operation of the hybrid vehicle based on the grade value.
Claims18
A grade determination system for a hybrid vehicle that travels on a surface, comprising:
- a first module that determines a net force on said hybrid vehicle;
- a second module that calculates a grade value of said surface based on said net force;
- and
- a third module that, based on said grade value, at least one of maintains a lower gear when said hybrid vehicle is in cruise control and adjusts an idle speed of an engine of said hybrid vehicle.
A method of regulating operation of a hybrid vehicle traveling on a surface having a grade, comprising:
- determining a net force on said hybrid vehicle;
- calculating a grade value of said surface based on said net force;
- and
- based on said grade value, at least one of maintaining a lower gear when said hybrid vehicle is in cruise control and adjusting an idle speed of an engine of said hybrid vehicle.
Dependencies are inferred from the claim text.