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US 10,099,575 B2Granted
Creep compensation using road grade and mass estimation
AssigneeFord Global Technlogies, LLC
InventorsMark Steven Yamazaki, Hai Yu, Rajit Johri, Wei Liang
Life of this patent
Estimating the term…
Abstract
A method according to an exemplary aspect of the present disclosure includes, among other things, controlling a torque output of an electric machine of an electrified vehicle during a vehicle creep condition, the torque output calculated based at least on a road grade estimate and a vehicle mass estimate.
Claims18
A method implemented by a vehicle system, the vehicle system comprising:
- a transmission gearbox;
- an electric machine that supplies torque to an input shaft of said transmission gearbox;
- and a control unit in communication with the electric machine, the control unit implementing the method, the method comprising:
- deriving a first torque compensation value from a road grade estimate;
- deriving a second torque compensation value from a vehicle mass estimate;
- and
- controlling a torque output of an electric machine of an electrified vehicle during a vehicle creep condition, the torque output calculated based at least on the first torque compensation value and the second torque compensation value;
- and
- modifying the torque output of the electric machine to compensate for variations in the road grade estimate and the vehicle mass estimate during the vehicle creep condition.
6 more elements
A vehicle system, comprising:
- a transmission gearbox;
- an electric machine that supplies torque to an input shaft of said transmission gearbox;
- and
- a control unit in communication with said electric machine and configured to estimate a road grade and a vehicle mass and modify a torque output of said electric machine to compensate for variations in the road grade and the vehicle mass during vehicle creep conditions.
1 more element
Dependencies are inferred from the claim text.