Indirect tire pressure monitoring apparatus and method
AssigneeHl Mando Corporation
InventorJehyun Bang
Life of this patent
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Abstract
Disclosed herein is an indirect tire pressure monitoring apparatus including a wheel speed sensor installed in each wheel to detect a wheel speed, and a controller electrically connected to the wheel speed sensor, wherein the controller determines a decompression determination indicator according to the wheel speed detected by the wheel speed sensor, determines a turning compensation amount for turning compensation of the decompression determination indicator, compensates the decompression determination indicator based on the turning compensation amount, and determines whether the tire is decompressed based on the compensated decompression determination indicator.
Claims14
An indirect tire pressure monitoring apparatus comprising:
- a controller electrically connected to a wheel speed sensor configured to detect a wheel speed,
- wherein the controller is configured to:
- obtain a first time taken for one rotation of a tone wheel of a rear left wheel RL, a second time taken for one rotation of a tone wheel of a front left wheel FL, a third time taken for one rotation of a tone wheel of a rear right wheel RR, and a fourth time taken for one rotation of a tone wheel of a front right wheel FR,
- determine a decompression determination indicator including a first indicator which is a time difference between the second time and the first time in comparison to the first time, a second indicator which is a time difference between the fourth time and the third time in comparison to the third time, a third indicator which is a time difference between the second time and the third time in comparison to the third time, and a fourth indicator which is a time difference between the fourth time and the first time in comparison to the first time,
- determine a turning compensation amount for turning compensation of the decompression determination indicator based on the wheel speed or a yaw rate detected by a yaw rate sensor,
- compensate the decompression determination indicator based on the turning compensation amount, and
- determine whether the tire is decompressed based on the compensated decompression determination indicator.
An indirect tire pressure monitoring method comprising:
- obtaining a wheel speed of each wheel through a controller electrically connected to a wheel speed sensor;
- obtaining a first time taken for one rotation of a tone wheel of a rear left wheel RL, a second time taken for one rotation of a tone wheel of a front left wheel FL, a third time taken for one rotation of a tone wheel of a rear right wheel RR, and a fourth time taken for one rotation of a tone wheel of a front right wheel FR;
- determining a decompression determination indicator including a first indicator which is a time difference between the second time and the first time in comparison to the first time, a second indicator which is a time difference between the fourth time and the third time in comparison to the third time, a third indicator which is a time difference between the second time and the third time in comparison to the third time, and a fourth indicator which is a time difference between the fourth time and the first time in comparison to the first time;
- determining a turning compensation amount for turning compensation of the decompression determination indicator based on the wheel speed or a yaw rate detected by a yaw rate sensor;
- compensating the decompression determination indicator based on the turning compensation amount;
- and
- determining whether a tire is decompressed based on the compensated decompression determination indicator.
Dependencies are inferred from the claim text.