Method, apparatus and program for alarming abnormality in tire air-pressure

• US 20080021610A1
• Filed: 06/29/2007
• Published: 01/24/2008
• Est. Priority Date: 07/20/2006
• Status: Active Grant

• Current Assignee: Sumitomo Rubber Industries Limited
• Original Assignee: Sumitomo Rubber Industries Limited
• Inventors: Oshiro, Yuji
• Granted Patent: US 7,912,604 B2
• Time in Patent Office: Days
• US Class Current: 701/37
• CPC Class Codes: B60C 23/061 by monitoring wheel speed measuring distance traversed on the ground by vehicles G01C22/00

Abstract

It is the purpose of the present invention to provide a method, apparatus and program for alarming abnormality in tire air-pressure capable of precisely detecting decrease in tire air-pressure even at actuation of air suspension in a vehicle equipped with air suspensions.

The present invention discloses a method for alarming abnormality in tire air-pressure informing decrease in tire air-pressure mounted on a vehicle, comprising a step of judging whether loads applied on respective tires are changed by the influence of air suspensions based on the difference of the heights of strokes between left wheel and right wheel in a vehicle equipped with the air suspensions and affect the rotational wheel speeds of tires or not, and increasing threshold for carrying out the judgment of decrease in tire air-pressure when the air suspensions provide influence.

Claims

1. A method for alarming abnormality in tire air-pressure informing decrease in tire air-pressure mounted on a vehicle, comprising a step of judging whether loads applied on respective tires are changed by the influence of air suspensions based on the difference of the heights of strokes between left wheel and right wheel in the vehicle equipped with the air suspensions and affect the rotational wheel speeds of tires or not, and not carrying out the judgment of decrease in tire air-pressure when the air suspensions provide influence.

2. A method for alarming abnormality in tire air-pressure informing decrease in tire air-pressure mounted on a vehicle, comprising a step of judging whether loads applied on respective tires are changed by the influence of air suspensions based on the difference of the heights of strokes between left wheel and right wheel in the vehicle equipped with the air suspensions and affect the rotational wheel speeds of tires or not, and increasing threshold for carrying out the judgment of decrease in tire air-pressure when the air suspensions provide influence.

3. A method for alarming abnormality in tire air-pressure informing decrease in tire air-pressure mounted on a vehicle, comprising a step of judging whether loads applied on respective tires are changed by the influence of air suspensions based on the difference of the heights of strokes between left wheel and right wheel in a vehicle equipped with the air suspensions and affect the rotational wheel speeds of tires or not, and correcting a judgment value for carrying out the judgment of decrease in tire air-pressure when the air suspensions provide influence.

4. An apparatus for alarming abnormality in tire air-pressure informing decrease in tire air-pressure mounted on a vehicle, comprising means of judging whether loads applied on respective tires are changed by the influence of air suspensions based on the difference of the heights of strokes between left wheel and right wheel in the vehicle equipped with the air suspensions and affect the rotational wheel speeds of tires or not, and not carrying out the judgment of decrease in tire air-pressure when the air suspensions provide influence.

5. An apparatus for alarming abnormality in tire air-pressure informing decrease in tire air-pressure mounted on a vehicle, comprising means of judging whether loads applied on respective tires are changed by the influence of air suspensions based on the difference of the heights of strokes between left wheel and right wheel in the vehicle equipped with the air suspensions and affect the rotational wheel speeds of tires or not, and increasing threshold for carrying out the judgment of decrease in tire air-pressure when the air suspensions provide influence.

6. An apparatus for alarming abnormality in tire air-pressure informing decrease in tire air-pressure mounted on a vehicle, comprising means of judging whether loads applied on respective tires are changed by the influence of air suspensions based on the difference of the heights of strokes between left wheel and right wheel in a vehicle equipped with the air suspensions and affect the rotational wheel speeds of tires or not, and correcting a judgment value for carrying out the judgment of decrease in tire air-pressure when the air suspensions provide influence.

7. A program for alarming abnormality in tire air-pressure informing decrease in tire air-pressure mounted on a vehicle, for making a computer execute a procedure of judging whether loads applied on respective tires are changed by the influence of air suspensions based on the difference of the heights of strokes between left wheel and right wheel in the vehicle equipped with the air suspensions and affect the rotational wheel speeds of tires or not, and not carrying out the judgment of decrease in tire air-pressure when the air suspensions provide influence.

8. A program for alarming abnormality in tire air-pressure informing decrease in tire air-pressure mounted on a vehicle, for making a computer execute a procedure of judging whether loads applied on respective tires are changed by the influence of air suspensions based on the difference of the heights of strokes between left wheel and right wheel in the vehicle equipped with the air suspensions and affect the rotational wheel speeds of tires or not, and increasing threshold for carrying out the judgment of decrease in tire air-pressure when the air suspensions provide influence.

9. A program for alarming abnormality in tire air-pressure informing decrease in tire air-pressure mounted on a vehicle, for making a computer execute a procedure of judging whether loads applied on respective tires are changed by the influence of air suspensions based on the difference of the heights of strokes between left wheel and right wheel in a vehicle equipped with the air suspensions and affect the rotational wheel speeds of tires or not, and correcting a judgment value for carrying out the judgment of decrease in tire air-pressure when the air suspensions provide influence.