Back to results
US 9,168,925 B2Granted
Method for estimating grade and rolling direction
AssigneeFord Global Technologies, LLC
InventorsEmrah Adamey, Mathew Alan Boesch
Life of this patent
Estimating the term…
Abstract
Systems and methods for determining vehicle rolling direction and road grade are disclosed. In one example, a vehicle rolling direction is determined from a correlation coefficient. The vehicle rolling direction is applied to a kinematic equation to determine road grade.
Claims20
A method for operating a vehicle, comprising:
- adjusting an actuator in response to a rolling direction estimated from a correlation coefficient, where the correlation coefficient is a summation of unsigned wheel speed values and vehicle longitudinal acceleration values.
A method for operating a vehicle, comprising:
- adjusting an actuator in response to a grade estimate, the grade estimate based on a kinematic equation and rolling direction estimated from a correlation coefficient based on an unsigned wheel speed and a vehicle longitudinal acceleration, and where the kinematic equation describes a relationship between accelerometer based vehicle acceleration, grade acceleration, and wheel speed based acceleration.
A vehicle system, comprising:
- an accelerometer;
- a wheel speed sensor;
- and
- a controller including executable instructions stored in non-transitory memory for adjusting an actuator in response to a road grade estimate determined from a correlation coefficient derived from a summation of vehicle acceleration indicated via the accelerometer and vehicle acceleration as determined via the wheel speed sensor.
1 more element
Dependencies are inferred from the claim text.