Automatic initialization method applied to device for detecting pneumatic abnormalities on the basis of variations in angular velocity of tire

Claim 2

An automatic initialization method in a device for detecting pneumatic abnormality of a tire on the basis of variations in angular velocity of the tire wherein angular velocities of tires are relatively compared with one another and if a predetermined difference exists an alarm for tire deflation is issued, comprising the steps of: measuring and monitoring acceleration of a vehicle in a lateral direction, obtaining for each tire 1, 2, 3 and 4, under normal tire pressure, an angular velocity of rotation A, B, C and D, respectively and only using the data of angular velocity of rotation of each corresponding tire when the acceleration of the vehicle in the lateral direction ranges from -0.03 g to +0.03 g, and obtaining a correction value for each tire Ac, Bc, Cc and Dc from the angular velocity of rotation A, B, C and D of corresponding tire 1, 2, 3 and 4, respectively, on the basis of the following formulas: Ac=A/A Bc=A/B Cc=A/C Dc=A/D wherein the device is so designed to relatively compare Ac×A'; Bc×B'; Cc×C' and Dc×D', A', B', C' and D' being defined as angular velocities of rotation detected for each corresponding tire, respectively, when the vehicle is running.

Claim 3

An automatic initialization method in a device for detecting pneumatic abnormality of a tire on the basis of variations in angular velocity of the tire wherein angular velocities of tires are relatively compared with one another and if a predetermined difference exists an alarm for tire deflation is issued, comprising the steps of: measuring and monitoring a steering angle of a vehicle, obtaining for each tire 1, 2, 3 and 4, under normal tire pressure, an angular velocity of rotation A, B, C and D, respectively, and only using the data of angular velocity of rotation of each corresponding tire when the steering angle of the vehicle ranges from -15° to +15°, and obtaining a correction value for each tire Ac, Bc, Cc and Dc from the angular velocity of rotation A, B, C and D of corresponding tire 1, 2, 3 and 4, respectively, on the basis of the following formulas: Ac=A/A Bc=A/B Cc=A/C Dc=A/D wherein the device is so designed to relatively compare Ac×A'; Bc×B'; Cc×C' and Dc×D', A', B', C' and D' being defined as angular velocities of rotation detected for each corresponding tire, respectively, when the vehicle is running.

Claim 4

An automatic initialization method in a device for detecting pneumatic abnormality of a tire on the basis of variations in angular velocity of the tire wherein angular velocities of tires are relatively compared with one another and if a predetermined difference exists an alarm for tire deflation is issued, comprising the steps of: measuring and monitoring a steering angle of a vehicle, obtaining for each tire 1, 2, 3 and 4, under normal tire pressure, an angular velocity of rotation A, B, C and D, respectively, and only using the data of angular velocity of rotation of each corresponding tire when the steering angle of the vehicle ranges from -15° to +15°, and obtaining a correction value for each tire Ac, Bc, Cc and Dc from the angular velocity of rotation A, B, C and D of corresponding tire 1, 2, 3 and 4, respectively, on the basis of the following formulas: Ac=A/A Bc=A/B Cc=A/C Dc=A/D wherein the device is so designed to relatively compare Ac×A'; Bc×B'; Cc×C' and Dc×D', A', B', C' and D' being defined as angular velocities of rotation detected for each corresponding tire, respectively, when the vehicle is running.

Claim 5

An automatic initialization method in a device for detecting pneumatic abnormality of a tire on the basis of variations of angular velocity of the tire wherein angular velocities of tires are relatively compared with one another and if a predetermined difference exists an alarm for tire deflation is issued, comprising the steps of: measuring and monitoring acceleration of a vehicle in the lateral direction, measuring and monitoring a steering addle of the vehicle, obtaining for each tire 1, 2, 3 and 4, under normal tire pressure, an angular velocity of rotation A, B, C and D, respectively, and only using the data of angular velocity of rotation of each corresponding tire when the acceleration in the lateral direction ranges from -0.03 g to +0.03 g and the steering angle of the vehicle ranges from -15° to +15°, and obtaining a correction value for each tire Ac, Bc, Cc and Dc from the angular velocity of rotation A, B, C and D of corresponding tire 1, 2, 3 and 4, respectively, on the basis of the following formulas: Ac=A/A Bc=A/B Cc=A/C Dc=A/D wherein the device is so designed to relatively compare Ac ×A'; Bc×B'; Cc×C' and Dc×D', A', B', C' and D' being defined as angular velocities of rotation detected for each corresponding tire, respectively, when the vehicle is running.

Claim 6

An automatic initialization method in a device for detecting pneumatic abnormality of a tire on the basis of variations of angular velocity of the tire wherein angular velocities of tires are relatively compared with one another and if a predetermined difference exists an alarm for tire deflation is issued, comprising the steps of: measuring and monitoring acceleration of a vehicle in the lateral direction, measuring and monitoring a steering addle of the vehicle, obtaining for each tire 1, 2, 3 and 4, under normal tire pressure, an angular velocity of rotation A, B, C and D, respectively, and only using the data of angular velocity of rotation of each corresponding tire when the acceleration in the lateral direction ranges from -0.03 g to +0.03 g and the steering angle of the vehicle ranges from -15° to +15°, and obtaining a correction value for each tire Ac, Bc, Cc and Dc from the angular velocity of rotation A, B, C and D of corresponding tire 1, 2, 3 and 4, respectively, on the basis of the following formulas: Ac=A/A Bc=A/B Cc=A/C Dc=A/D wherein the device is so designed to relatively compare Ac ×A'; Bc×B'; Cc×C' and Dc×D', A', B', C' and D' being defined as angular velocities of rotation detected for each corresponding tire, respectively, when the vehicle is running.