Method for detecting the direction of travel of a motor vehicle
First Claim
1. A method for determining the longitudinal direction of travel of a vehicle, said method comprising:
- a step (a) of collecting a first signal (Signal1) from a torque sensor, representing a first driving parameter, wherein the sign of the variations of said first signal does not depend on the longitudinal direction of travel of the vehicle, and the first parameter is a torque exerted by a driver of the vehicle on a steering wheel of the vehicle,a step (b) of collecting a second signal (Signal2) from a stability control system sensor, representing a second driving parameter distinct from the first driving parameter, and wherein the sign of the variations of said second signal changes depending on the longitudinal direction of travel of the vehicle, wherein the second parameter is a yaw rate (ψ
′
) of the vehicle, thena step (c) of comparing signs, said step (c) comprising;
a static comparison (c1) between the signs of respective instantaneous values of the first and second signal (Signal1), (Signal2), wherein the sign of the instantaneous value of the first signal (Signal1) is compared with the sign of the instantaneous value of the second signal (Signal2) in order to determine therefrom the longitudinal direction of travel of the vehicle, depending on whether said signs are identical or on the contrary different from each other, anda dynamic comparison (c2) wherein the sign of the variation of the first signal (Signal1) over a predefined time period is compared with the sign of the variation of the second signal (Signal2) over the predefined time period in order to determine therefrom the longitudinal direction of travel of the vehicle, depending on whether said signs are identical or on the contrary different from each other,a step of determining a confirmed longitudinal direction of travel based on the longitudinal direction of travel determined by the static comparison (c1) and the longitudinal direction of travel determined by the dynamic comparison (c2), anda step of using, by an onboard computer in the vehicle, the determined confirmed longitudinal direction of travel of the vehicle to inhibit determination of an absolute angular position of a steering wheel of the vehicle.
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Accused Products
Abstract
The invention concerns a method for determining the direction of longitudinal travel of a vehicle comprising a step (a) of collecting a first signal (Signal1), representative of a first driving parameter, such as the steering-wheel torque, and of which the sign of the value and/or the sign of the variations is not dependent on the direction of longitudinal travel of the vehicle, a step (b) of collecting a second signal (Signal2), representative of a second driving parameter separate from the first driving parameter, such as the yaw rate, and of which the sign of the value and/or the sign of the variations changes on the basis of the direction of longitudinal travel of the vehicle, then a step (c) of comparing signs during which the sign of the value, or of the variation, of the first signal (Signal1) is compared with the sign of the value, or of the variation, of the second signal (Signal2) in order to deduce therefrom the direction of longitudinal travel of the vehicle, depending on whether said signs are identical or, on the contrary, different.
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Citations
12 Claims
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1. A method for determining the longitudinal direction of travel of a vehicle, said method comprising:
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a step (a) of collecting a first signal (Signal1) from a torque sensor, representing a first driving parameter, wherein the sign of the variations of said first signal does not depend on the longitudinal direction of travel of the vehicle, and the first parameter is a torque exerted by a driver of the vehicle on a steering wheel of the vehicle, a step (b) of collecting a second signal (Signal2) from a stability control system sensor, representing a second driving parameter distinct from the first driving parameter, and wherein the sign of the variations of said second signal changes depending on the longitudinal direction of travel of the vehicle, wherein the second parameter is a yaw rate (ψ
′
) of the vehicle, thena step (c) of comparing signs, said step (c) comprising; a static comparison (c1) between the signs of respective instantaneous values of the first and second signal (Signal1), (Signal2), wherein the sign of the instantaneous value of the first signal (Signal1) is compared with the sign of the instantaneous value of the second signal (Signal2) in order to determine therefrom the longitudinal direction of travel of the vehicle, depending on whether said signs are identical or on the contrary different from each other, and a dynamic comparison (c2) wherein the sign of the variation of the first signal (Signal1) over a predefined time period is compared with the sign of the variation of the second signal (Signal2) over the predefined time period in order to determine therefrom the longitudinal direction of travel of the vehicle, depending on whether said signs are identical or on the contrary different from each other, a step of determining a confirmed longitudinal direction of travel based on the longitudinal direction of travel determined by the static comparison (c1) and the longitudinal direction of travel determined by the dynamic comparison (c2), and a step of using, by an onboard computer in the vehicle, the determined confirmed longitudinal direction of travel of the vehicle to inhibit determination of an absolute angular position of a steering wheel of the vehicle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification