Traction control system for vehicle
AssigneeNissan Motor Co., Ltd.
InventorHaruhisa Tsuchikawa
Life of this patent
Estimating the term…
Abstract
In order to attain a stable traction control regardless of an inertia change in a driving system, when a driving force transmitted from driving wheels to a road surface is lowered by a certain quantity by torque control, the driving force is lowered according to a transmission torque capacity of a clutch element for connecting and disconnecting a power source and the driving wheels.
Claims18
A traction control system for driving wheels of a vehicle, comprising:
- a power source;
- a starting clutch having a variable transmission torque capacity and interposed between the power source and the driving wheels to connect and disconnect the power source and the driving wheels;
- a braking device associated with each of the driving wheels and capable of independently controlling a braking force to each wheel;
- and
- a controller configured to lower a driving force transmitted from the driving wheels to a road surface by controlling a driving torque of the power source and/or a braking force to the driving wheels when an acceleration slip in the driving wheels is above a certain value and further configured to reduce a lowering quantity of the driving force as the variable transmission torque capacity of the starting clutch decreases.
A traction control system controller for driving wheels of a vehicle comprising a power source, a starting clutch having a variable transmission torque capacity and interposed between the power source and the driving wheels to connect and disconnect the power source and the driving wheels, a braking device associated with each of the driving wheels and capable of independently controlling a braking force to each wheel, the controller comprising:
- means for lowering a driving force transmitted from the driving wheels to a road surface by controlling a driving torque of the power source and/or a braking force to the driving wheels when an acceleration slip of the driving wheels is above a certain value;
- and
- means for reducing a lowering quantity of the driving force as the variable transmission torque capacity of the starting clutch decreases.
A method of controlling a traction control system for driving wheels of a vehicle comprising a power source, a starting clutch having a variable transmission torque capacity and interposed between the power source and the driving wheels to connect and disconnect the power source and the driving wheels, a braking device associated with each of the driving wheels and capable of independently controlling a braking force to each wheel, the method comprising:
- lowering a driving force transmitted from the driving wheels to a road surface by controlling a driving torque of the power source and/or a braking force to the driving wheels when an acceleration slip of the driving wheels is above a certain value;
- and
- reducing a lowering quantity of the driving force as the variable transmission torque capacity of the starting clutch decreases.
Dependencies are inferred from the claim text.