Air pressure warning device of vehicle tire
First Claim
1. An air pressure warning device of a vehicle tire, which comprises tire air pressure detection means, attached to a vehicle tire, for detecting a tire air pressure, and informing means for informing a tire air pressure state on the basis of the tire air pressure detected by the tire air pressure detection means, comprising:
- storage means for storing a normal air pressure of the tire;
calculation means for calculating an excessive/deficient amount of a measured air pressure of the tire from the normal air pressure on the basis of a relationship between the normal air pressure stored in said storage means and the air pressure detected by the tire air pressure detection means;
expressway traveling detection means for detecting if the vehicle is traveling on an expressway or if the vehicle will travel on the expressway before the beginning of actual traveling; and
informing control means for controlling the informing means to inform the excessive/deficient amount calculated by said calculation means as an air pressure state of the tire, wherein said informing control means controls the informing means to inform a deficient amount larger than an actual amount upon informing the deficient amount of the measured air pressure of the tire from the normal air pressure, by correcting to increase the normal air pressure read out from said storage means by a predetermined value, and setting the corrected normal air pressure in said calculation means, when said expressway traveling detection means detects that the vehicle is traveling on the expressway, or detects possibility of traveling on the expressway before the beginning of actual traveling.
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Accused Products
Abstract
An air pressure warning device of a vehicle tire has an excessive/deficient amount calculation module (10b) for calculating an excessive/deficient amount on the basis of the difference between a normal air pressure stored in a normal air pressure storage module (10a) and a detected tire air pressure, an informing control module (10c) for controlling an informing module (11) to inform an excessive/deficient state of the tire air pressure determined based on the calculated excessive/deficient amount, and a normal air pressure correction module 10e for increasing the readout normal air pressure by a predetermined value when an expressway traveling detection module (10d) detects that the vehicle is on an expressway.
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Citations
12 Claims
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1. An air pressure warning device of a vehicle tire, which comprises tire air pressure detection means, attached to a vehicle tire, for detecting a tire air pressure, and informing means for informing a tire air pressure state on the basis of the tire air pressure detected by the tire air pressure detection means, comprising:
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storage means for storing a normal air pressure of the tire;
calculation means for calculating an excessive/deficient amount of a measured air pressure of the tire from the normal air pressure on the basis of a relationship between the normal air pressure stored in said storage means and the air pressure detected by the tire air pressure detection means;
expressway traveling detection means for detecting if the vehicle is traveling on an expressway or if the vehicle will travel on the expressway before the beginning of actual traveling; and
informing control means for controlling the informing means to inform the excessive/deficient amount calculated by said calculation means as an air pressure state of the tire, wherein said informing control means controls the informing means to inform a deficient amount larger than an actual amount upon informing the deficient amount of the measured air pressure of the tire from the normal air pressure, by correcting to increase the normal air pressure read out from said storage means by a predetermined value, and setting the corrected normal air pressure in said calculation means, when said expressway traveling detection means detects that the vehicle is traveling on the expressway, or detects possibility of traveling on the expressway before the beginning of actual traveling. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An air pressure warning device of a vehicle tire, which comprises a tire air pressure sensor, attached to a vehicle tire, for detecting a tire air pressure, and an informing unit for informing a tire air pressure state on the basis of the tire air pressure detected by the tire air pressure sensor, comprising:
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a storage module for storing a normal air pressure of the tire;
a calculation module for calculating an excessive/deficient amount of a measured air pressure of the tire from the normal air pressure on the basis of a relationship between the normal air pressure stored in said storage module and the air pressure detected by the tire air pressure sensor;
an expressway traveling detection module for detecting if the vehicle is traveling on an expressway or if the vehicle will travel on the expressway before the beginning of actual traveling; and
an informing control module for controlling the informing unit to inform the excessive/deficient amount calculated by said calculation module as an air pressure state of the tire, wherein said informing control module controls the informing unit to inform a deficient amount larger than an actual amount upon informing the deficient amount of the measured air pressure of the tire from the normal air pressure, by correcting to increase the normal air pressure read out from said storage module by a predetermined value, and setting the corrected normal air pressure in said calculation module, when said expressway traveling detection module detects that the vehicle is traveling on the expressway, or detects possibility of traveling on the expressway before the beginning of actual traveling. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification