System and method for determining a steering angle for a vehicle and system and method for controlling a vehicle based on same
First Claim
1. A system for determining an angular position of a pair of steerable wheels of a vehicle having a plurality of wheels comprising:
- a steering angle sensor configured to output sensor angle data representative of a toe angle of the steerable pair of wheels, the steering angle sensor being a relative position sensor;
a yaw rate sensor configured to output data representative of an angular velocity of the vehicle about a vertical axis of the vehicle;
a pair of wheel speed sensors, wherein each wheel speed sensor is configured to output data representative of a rotational velocity of a respective one of the plurality of wheels; and
a controller in electrical communication with each of the pair of wheel speed sensors and the yaw rate sensor, one of the relative position sensor and the controller being configured to determine a neutral position of the relative position sensor such that the neutral position corresponds to a position of the relative position sensor when the vehicle travels along a substantially straight path, and the controller being configured to;
determine a first steering angle based on data received from the plurality of wheel speed sensors;
determine a second steering angle based on data received from the yaw rate sensor; and
determine the angular position of the pair of steerable wheels to be one of the first steering angle and the second steering angle until one of the relative position sensor and the controller determines the neutral position.
1 Assignment
0 Petitions
Accused Products
Abstract
A system for determining an angular position of a pair of steerable wheels of a vehicle having a plurality of wheels can include a yaw rate sensor, a pair of wheel speed sensors and a controller. The yaw rate sensor can be configured to output data representative of an angular velocity of the vehicle about a vertical axis of the vehicle. Each of the pair of wheel speed sensors can be configured to output data representative of a rotational velocity of a respective one of the plurality of wheels. The controller can be in electrical communication with each of the pair of wheel speed sensors and the yaw rate sensor. The controller can be configured to determine a first steering angle based on data received from the yaw rate sensor, to determine a second steering angle based on data received from the plurality of wheel speed sensors, and to select one of the first steering angle and the second steering angle for use in manipulating various vehicle parameters, including torque vectoring parameters, among other parameters.
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Citations
21 Claims
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1. A system for determining an angular position of a pair of steerable wheels of a vehicle having a plurality of wheels comprising:
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a steering angle sensor configured to output sensor angle data representative of a toe angle of the steerable pair of wheels, the steering angle sensor being a relative position sensor; a yaw rate sensor configured to output data representative of an angular velocity of the vehicle about a vertical axis of the vehicle; a pair of wheel speed sensors, wherein each wheel speed sensor is configured to output data representative of a rotational velocity of a respective one of the plurality of wheels; and a controller in electrical communication with each of the pair of wheel speed sensors and the yaw rate sensor, one of the relative position sensor and the controller being configured to determine a neutral position of the relative position sensor such that the neutral position corresponds to a position of the relative position sensor when the vehicle travels along a substantially straight path, and the controller being configured to; determine a first steering angle based on data received from the plurality of wheel speed sensors; determine a second steering angle based on data received from the yaw rate sensor; and determine the angular position of the pair of steerable wheels to be one of the first steering angle and the second steering angle until one of the relative position sensor and the controller determines the neutral position. - View Dependent Claims (2, 3, 4, 5)
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6. A method for determining a steering angle of a pair of steerable wheels of a vehicle having a plurality of wheels comprising:
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providing a relative position steering angle sensor; determining a neutral position of the steering angle sensor, where the neutral position corresponds to a position of the steering angle sensor when the vehicle travels a substantially straight path; determining a first steering angle based on rotational velocity data of the plurality of wheels; determining a second steering angle based on a yaw rate of the vehicle; and determining the steering angle of the pair of steerable wheels to be one of the first steering angle and the second steering angle during the determining a neutral position. - View Dependent Claims (7, 8, 9, 10)
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11. A control system for an all-wheel drive powertrain of a vehicle having a power source configured to produce torque, a steerable pair of wheels configured to be driven by the torque, and a second pair of wheels configured to be selectively driven by the torque, the control system comprising:
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a first clutch assembly selectively connecting a first wheel of the second pair of wheels to the power source; and a second clutch assembly selectively connecting a second wheel of the second pair of wheels to the power source; a relative position steering angle sensor configured to output sensor angle data representative of a toe angle of the steerable pair of wheels, a yaw rate sensor configured to output data representative of an angular velocity of the vehicle about a vertical axis of the vehicle; a pair of wheel speed sensors, wherein each wheel speed sensor is configured to output data representative of a rotational velocity of a respective one of the second pair of wheels; and a controller in electrical communication with each of the plurality of wheel speed sensors and the yaw rate sensor, one of the relative position steering angle sensor and the controller being configured to determine a neutral position of the relative position steering angle sensor such that the neutral position corresponds to a position of the relative position steering angle sensor when the vehicle travels a substantially straight path, and the controller being configured to, determine a first steering angle based on data received from the plurality of wheel speed sensors; determine a second steering angle based on data received from the yaw rate sensor; determine an angular position of the steerable pair of wheels to be one of the first steering angle and the second steering angle until the one of the relative position steering angle sensor and the controller has determined the neutral position; and modulate the clutch assemblies based on the angular position of the steerable pair of wheels to vary transmission of torque from the power source to the second pair of wheels. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A method for controlling an on-demand all-wheel drive system of a vehicle to supplement an operator'"'"'s input to the vehicle comprising:
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providing a power source, a pair of steerable wheels driven by the power source, a pair of rear wheels selectively driven by the power source, a pair of rear clutch assemblies selectively connecting a respective one of the pair of rear wheels to the power source, a yaw rate sensor configured to output data representative of an angular velocity of the vehicle about a vertical axis of the vehicle, and a pair of wheel speed sensors configured to output data representative of a rotational speed of a respective one of the pair of rear wheels; providing a relative position steering angle sensor configured to output data representative of angular position of the pair of steerable wheels; calibrating the relative position steering angle sensor; determining a first steering angle based on the rotational speed data; determining a second steering angle based on the data from the yaw rate sensor; and determining the angular position of the pair of steerable wheels to be one of the first steering angle and the second steering angle during the calibrating. - View Dependent Claims (18, 19, 20, 21)
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Specification