Wheel slip determination for vehicles
AssigneeGM Global Technology Operations LLC
InventorsMahir Hodzic, Eric J. Holdorf, Eric E. Krueger, Kevin S. Kidston
Life of this patent
Estimating the term…
Abstract
A method for assessing slippage of wheels in a vehicle includes the steps of measuring, via a sensor, an initial value of vehicle speed, determining, via a processor, at least one of a minimum vehicle speed and a maximum vehicle speed, and determining, via the processor, wheel slip using the initial value and the at least one of the minimum vehicle speed and the maximum vehicle speed.
Claims20
A method for assessing slippage of wheels in a vehicle, the method comprising the steps of:
- measuring, via a sensor, an initial value of vehicle speed;
- determining, via a processor, at least one of a minimum vehicle speed and a maximum vehicle speed, the minimum vehicle speed comprising a forward-looking estimate of the minimum speed that the vehicle is capable to be able to obtain under current conditions, and the maximum vehicle speed comprising a forward-looking estimate of the maximum speed that the vehicle is capable to be able to obtain under current conditions;
- and
- determining, via the processor, wheel slip using the initial value and the at least one of the minimum vehicle speed and the maximum vehicle speed.
A method of assessing slippage of wheels in a vehicle, the method comprising the steps of:
- measuring, via a transmission output shaft speed sensor, an average wheel driven speed of the vehicle;
- determining, via a processor, a minimum vehicle speed and a maximum vehicle speed, the minimum vehicle speed comprising a forward-looking estimate of the minimum speed that the vehicle is capable to be able to obtain under current conditions, and the maximum vehicle speed comprising a forward-looking estimate of the maximum speed that the vehicle is capable to be able to obtain under current conditions;
- calculating, via the processor, a bounded vehicle speed using the average wheel driven speed, the minimum vehicle speed, and the maximum vehicle speed;
- and
- calculating, via the processor, wheel slip using the average wheel driven speed and the bounded vehicle speed.
A system for assessing slippage of wheels in a vehicle, the system comprising:
- a transmission output shaft speed sensor configured to provide signals pertaining to the wheels of the vehicle;
- and
- a processor coupled to the transmission output shaft speed sensor and configured to:
- determine an average wheel driven speed of the vehicle using the signals;
- calculate a minimum vehicle speed and a maximum vehicle speed, the minimum vehicle speed comprising a forward-looking estimate of the minimum speed that the vehicle is capable to be able to obtain under current conditions, and the maximum vehicle speed comprising a forward-looking estimate of the maximum speed that the vehicle is capable to be able to obtain under current conditions;
- calculate a bounded vehicle speed using the average wheel driven speed, the minimum vehicle speed, and the maximum vehicle speed;
- and
- determine wheel slip using the average wheel driven speed and the bounded vehicle speed.
Dependencies are inferred from the claim text.