Method and apparatus for detecting decrease in tire air-pressure, and program for judging decompression of tire
First Claim
1. A method for detecting decrease in tire air-pressure, which detects decrease in internal pressure of a tire on the basis of rotational information obtained from tires attached to a vehicle, the method comprising the steps of:
- detecting rotational information of the respective tires;
storing rotational information of the respective tires;
detecting whether the vehicle is running on a flat road or not;
detecting whether the vehicle is accelerating or decelerating;
comparing rotational information of both front wheels with rotational information of both rear wheels when it has been determined that the vehicle is running on a flat road and that the vehicle is neither accelerating nor decelerating; and
judging simultaneous decompression of both front wheel tires or simultaneous decompression of both rear wheel tires on the basis of a relationship between a value obtained through comparison of the rotational information of both front wheels and both rear wheels and a specified threshold.
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Accused Products
Abstract
A method for detecting decrease in tire air-pressure including the steps of: detecting rotational information of the respective tires; storing rotational information; detecting whether the vehicle is running on a flat road or not; detecting whether the vehicle is accelerating or decelerating; comparing rotational information of both front wheels with rotational information of both rear wheels when it has been determined that the vehicle is running on a flat road and that the vehicle is neither accelerating nor decelerating; and judging simultaneous decompression of both front wheel tires or simultaneous decompression of both rear wheel tires on the basis of a relationship between a value obtained through comparison of the rotational information of both front wheels and both rear wheels and a specified threshold. It is possible to judge simultaneous decompression of both front wheel tires or both rear wheel tires when employing the present invention.
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Citations
6 Claims
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1. A method for detecting decrease in tire air-pressure, which detects decrease in internal pressure of a tire on the basis of rotational information obtained from tires attached to a vehicle, the method comprising the steps of:
- detecting rotational information of the respective tires;
storing rotational information of the respective tires;
detecting whether the vehicle is running on a flat road or not;
detecting whether the vehicle is accelerating or decelerating;
comparing rotational information of both front wheels with rotational information of both rear wheels when it has been determined that the vehicle is running on a flat road and that the vehicle is neither accelerating nor decelerating; and
judging simultaneous decompression of both front wheel tires or simultaneous decompression of both rear wheel tires on the basis of a relationship between a value obtained through comparison of the rotational information of both front wheels and both rear wheels and a specified threshold. - View Dependent Claims (2)
- detecting rotational information of the respective tires;
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3. An apparatus for detecting decrease in tire air-pressure, which detects decrease in internal pressure of a tire on the basis of rotational information obtained from tires attached to a vehicle, the apparatus comprising:
- rotational information detecting means which detect rotational information of the respective tires;
a rotational information storing means which stores the rotational information of the respective tires;
a running condition detection means which detects whether the vehicle is running on a flat road or not;
an acceleration/deceleration detection means which detects whether the vehicle is accelerating or decelerating;
a comparison means which compares rotational information of both front wheels with rotational information of both rear wheels when it has been determined that the vehicle is running on a flat road and that the vehicle is neither accelerating nor decelerating; and
a decompression judging means which judges simultaneous decompression of both front wheel tires or simultaneous decompression of both rear wheel tires on the basis of a relationship between a value obtained through comparison of the rotational information of both front wheels and both rear wheels and a specified threshold. - View Dependent Claims (4)
- rotational information detecting means which detect rotational information of the respective tires;
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5. A program for judging decompression of a tire, in which for judging decrease in tire air-pressure of a tire, a computer is made to function as a rotational information storing means which stores the rotational information of the respective tires;
- a running condition detection means which detects whether the vehicle is running on a flat road or not;
an acceleration/deceleration detection means which detects whether the vehicle is accelerating or decelerating;
a comparison means which compares rotational information of both front wheels with rotational information of both rear wheels when it has been determined that the vehicle is running on a flat road and that the vehicle is neither accelerating nor decelerating; and
a decompression judging means which judges simultaneous decompression of both front wheel tires or simultaneous decompression of both rear wheel tires on the basis of a relationship between a value obtained through comparison of the rotational information of both front wheels and both rear wheels and a specified threshold. - View Dependent Claims (6)
- a running condition detection means which detects whether the vehicle is running on a flat road or not;
Specification