Road gradient estimation arbitration
First Claim
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1. A vehicle comprising:
- a controller configured to generate output indicative of a road gradient derived from a first gradient estimation when a vehicle speed is less than a speed threshold and a signal indicative of longitudinal acceleration sensor input quality exceeds a threshold, a second gradient estimation when the vehicle speed exceeds the speed threshold and the signal exceeds the threshold, and a third gradient estimation when the signal does not exceed the threshold.
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Abstract
A vehicle and vehicle system are provided with a controller that is configured to generate output indicative of a road gradient based on at least one of a first estimation, a second estimation and a third estimation. The road gradient is based on the first estimation when a vehicle speed is less than a speed threshold and an input indicative of a longitudinal acceleration is available. The road gradient is based on the second estimation when the vehicle speed is greater than the speed threshold and the longitudinal acceleration is available. The road gradient is based on the third estimation when the longitudinal acceleration is not available.
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Citations
20 Claims
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1. A vehicle comprising:
a controller configured to generate output indicative of a road gradient derived from a first gradient estimation when a vehicle speed is less than a speed threshold and a signal indicative of longitudinal acceleration sensor input quality exceeds a threshold, a second gradient estimation when the vehicle speed exceeds the speed threshold and the signal exceeds the threshold, and a third gradient estimation when the signal does not exceed the threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A vehicle system comprising:
a controller configured to; generate output indicative of a road gradient based on a selected estimation that is a static estimation when a vehicle speed is less than a speed threshold and a signal indicative of longitudinal acceleration sensor input quality exceeds a threshold, a kinematic estimation when the vehicle speed is greater than the speed threshold and the signal exceeds the threshold, and a dynamic estimation when the signal does not exceed the threshold, and generate output indicative of a quality factor corresponding to the selected estimation. - View Dependent Claims (12, 13, 14, 15)
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16. A method for arbitrating road gradient estimation, comprising:
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generating, by a controller, output indicative of a road gradient based on a static estimation when a vehicle speed is less than a speed threshold and a signal indicative of longitudinal acceleration sensor input quality exceeds a threshold, a kinematic estimation when the vehicle speed is greater than the speed threshold and the signal exceeds the threshold, and a dynamic estimation when a longitudinal acceleration signal does not exceed the threshold, and generating, by the controller, output indicative of a quality factor corresponding to a selected estimation. - View Dependent Claims (17, 18, 19, 20)
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Specification