Method and apparatus for controlling vehicle rollback
First Claim
1. System for maintaining a vehicle at a predetermined velocity on a graded surface, comprising:
- a propulsion system operable to supply motive torque to at least one wheel of the vehicle;
a vehicle stability sensor; and
, a control system, adapted to receive signal input from the vehicle stability sensor, and, control magnitude of the motive torque supplied to the wheel in response thereto.
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Accused Products
Abstract
A system and method for maintaining a vehicle at a predetermined velocity on a graded surface is provided, which includes a propulsion system to supply motive torque to a vehicle wheel, a vehicle stability sensor, and a control system adapted to receive signal input from the vehicle stability sensor. The control system controls magnitude of the motive torque supplied to the wheel. The propulsion system may include an electric wheel motor powered by an electrical energy storage system, a hybrid powertrain system, and an internal combustion engine and transmission. The vehicle stability sensor determines orientation of the vehicle relative to a horizontal plane, including a longitudinal acceleration sensor and a virtual longitudinal acceleration sensor. The control system receives inputs from a wheel speed sensor, an accelerator pedal sensor, and a brake pedal sensor to control motive torque. Motive torque is controlled to maintain wheel speed sensor at a null output.
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Citations
24 Claims
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1. System for maintaining a vehicle at a predetermined velocity on a graded surface, comprising:
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a propulsion system operable to supply motive torque to at least one wheel of the vehicle;
a vehicle stability sensor; and
,a control system, adapted to receive signal input from the vehicle stability sensor, and, control magnitude of the motive torque supplied to the wheel in response thereto. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. Method to maintain a vehicle at a predetermined velocity on a graded surface, comprising:
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monitoring orientation of the vehicle relative to a horizontal plane; and
,controlling motive torque to at least one wheel of the vehicle based upon the orientation of the vehicle. - View Dependent Claims (18, 19, 20, 21)
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22. Method to control motive torque to at least one wheel of a vehicle, the vehicle having a propulsion system comprising an electrical energy storage system operable to power an electric motor operable to deliver the motive torque to the wheel, comprising:
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determining vehicle velocity, operator command for acceleration, and, operator command for braking force; and
,controlling the motive torque based upon the vehicle velocity, the operator command for acceleration, and the operator command for braking force. - View Dependent Claims (23, 24)
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Specification