Traction control system and method
AssigneeRobert Bosch GmbH
InventorJiamu Hu
Life of this patent
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Abstract
A method and system of controlling the traction of a vehicle having at least a front axle and a rear axle. One method includes determining a stability status of the vehicle, identifying a driving style of a driver of the vehicle, generating a first drive slip target, generating a second drive slip target, determining an engine torque produced by an engine of the vehicle, determining whether the engine torque is sufficient to support an application of the first and second drive slip targets, and generating at least one torque signal. The at least one torque signal is configured to alter an amount of torque that is applied to the front and rear axles of the vehicle according to the first and second drive slip targets, respectively.
Claims26
A traction control system comprising:
- a controller that generates a first drive slip target, a second drive slip target, and an output signal based on the first and second drive slip targets,
- wherein the first and second drive slip targets are generated according to a measured stability status of a vehicle and an estimation of a skill level of the driver of the vehicle,
- wherein the output signal is indicative of independent torque quantities to be applied to front and rear axles of the vehicle during turning, and
- wherein the controller analyzes loading characteristics of wheels of the vehicle to determine third and fourth drive slip targets, wherein the third and fourth drive slip targets at least partially determine a maximum amount of drive slip that is permitted at the front and rear axles.
A traction control system comprising:
- a controller that generates a first drive slip target, a second drive slip target, and an output signal based on the first and second drive slip targets,
- wherein the first and second drive slip targets are generated according to a measured stability status of a vehicle and an estimation of a skill level of the driver of the vehicle,
- wherein the first drive slip target indicates a first non-zero amount of slip that at least a first wheel of the vehicle is allowed with respect to a driving surface, and the second drive slip target indicates a second non-zero amount of slip that at least a second wheel of the vehicle is allowed with respect to the driving surface,
- wherein the output signal is indicative of independent torque quantities to be applied to front and rear axles of the vehicle during turning, and
- wherein the estimation of the skill level of the driver is based on a signal indicative of a braking force being applied to the wheels of the vehicle, a signal indicative of a steering angle of the vehicle, a signal indicative of an acceleration of the vehicle, a signal indicative of a yaw rate of the vehicle, a signal indicative of a lateral acceleration of the vehicle, or a combination thereof.
A traction control system comprising:
- a controller that generates a first drive slip target, a second drive slip target, and an output signal based on the first and second drive slip targets, and
- a desired driving style signal generator,
- wherein the first and second drive slip targets are generated according to a measured stability status of a vehicle and an estimation of a skill level of the driver of the vehicle,
- wherein the first drive slip target indicates a first non-zero amount of slip that at least a first wheel of the vehicle is allowed with respect to a driving surface, and the second drive slip target indicates a second non-zero amount of slip that at least a second wheel of the vehicle is allowed with respect to the driving surface,
- wherein the output signal is indicative of independent torque quantities to be applied to front and rear axles of the vehicle during turning, and
- wherein the controller receives a desired driving style signal from the desired driving style signal generator and generates signals that cause torque that is applied to the front and rear axles of the vehicle to vary from torque that would be applied based on the first and second drive slip targets.
Dependencies are inferred from the claim text.