Vehicle direction estimation using transmission control information
First Claim
Patent Images
1. A work vehicle, comprising:
- a chassis;
an engine mounted on the chassis;
a transmission driven by the engine, the transmission including at least one clutch configured to engage the transmission in a forward gear ratio and at least another clutch configured to engage the transmission in a reverse gear ratio;
a plurality of wheels supporting the chassis for movement over the ground, at least one of said wheels being coupled to the transmission to be driven thereby;
at least one steering actuator coupled to the chassis to steer the chassis with respect to the g round;
a navigation controller coupled to the at least one steering actuator to control the steering actuator; and
a transmission controller coupled to the transmission and to the navigation controller to sense a transmission parameter and communicate a vehicle direction to the navigation controller based upon the transmission parameter.
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Abstract
A work vehicle has a transmission controller that is configured to determine the direction of travel of the vehicle based upon the state of the transmission. The transmission controller is also configured to communicate this information to navigation system to assist the navigation system in determining the vehicle'"'"'s movement. The transmission controller determines the direction of travel based upon looking at the clutch state and the vehicle speed.
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Citations
20 Claims
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1. A work vehicle, comprising:
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a chassis;
an engine mounted on the chassis;
a transmission driven by the engine, the transmission including at least one clutch configured to engage the transmission in a forward gear ratio and at least another clutch configured to engage the transmission in a reverse gear ratio;
a plurality of wheels supporting the chassis for movement over the ground, at least one of said wheels being coupled to the transmission to be driven thereby;
at least one steering actuator coupled to the chassis to steer the chassis with respect to the g round;
a navigation controller coupled to the at least one steering actuator to control the steering actuator; and
a transmission controller coupled to the transmission and to the navigation controller to sense a transmission parameter and communicate a vehicle direction to the navigation controller based upon the transmission parameter. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of determining a direction of travel of a work vehicle comprising a transmission, said transmission comprising a plurality of clutches and communicating that direction to a vehicle navigation system, the method comprising the steps of:
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determining at least one operating state of the transmission;
determining a first direction of vehicle travel based upon the at least one operating state; and
communicating the first direction of vehicle travel to the vehicle navigation system. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A control system for a work vehicle including a transmission, the transmission including a plurality of clutches for driving the vehicle over the ground, the vehicle also including a navigation system and steering actuators coupled to the navigation system, the steering actuators being configured to steer the vehicle, the control system comprising:
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means for determining a direction of travel of the vehicle; and
means for communicating the direction of travel to the navigation system. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification