Driving force control system for vehicle
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsKunihiko Usui, Keisuke Ushida
Life of this patent
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Abstract
A driving force control system that controls a driving force in line with a driver's intension to propel a vehicle on a slippery road surface without wheel slip. A controller is configured to obtain individual relations of a slip ratio on a road surface to parameters including the driving force, a running resistance of the vehicle, and an accelerating force of the vehicle, and to control the driving force based on the obtained relations of the slip ratio to each of said parameters.
Claims18
A driving force control system for a vehicle that controls a driving force to propel the vehicle in accordance with a road surface condition, comprising:
- a controller that controls the driving force, the controller is configured to:
- obtain individual relations of a slip ratio on a road surface on which the vehicle travels to parameters including the driving force, a running resistance of the vehicle, and an accelerating force of the vehicle,
- control the driving force based on the obtained relations of the slip ratio to each of the parameters,
- determine reliability of each of the parameters based on collecting data for a predetermined period of time that is relative to an approximated curve, and
- update, based on determining the reliability, each of the parameters to predetermined values.
A driving force control system fora vehicle that controls a driving force to propel the vehicle in accordance with a road surface condition, comprising:
- a controller that controls the driving force, the controller is configured to:
- obtain individual relations of a slip ratio on a road surface on which the vehicle travels to parameters including the driving force, a running resistance of the vehicle, and an accelerating force of the vehicle,
- control the driving force based on the obtained relations of the slip ratio to each of the parameters
- determine availability of learned values of each of the parameters for the vehicle having travelled on the road surface on which the vehicle will travel, and
- input, based on determining the availability, the learned values of each of the parameters into a map.
Dependencies are inferred from the claim text.