PNEUMATIC CIRCUIT FOR TIRE TESTING DEVICE, TIRE TESTING DEVICE, AND TIRE TESTING METHOD
First Claim
1. A pneumatic circuit for tire testing device provided in a tire testing device having a tire holding unit for holding a tire, comprising:
- an air supply source for supplying compressed air to the tire held by the tire holding unit;
a pressure regulating valve for regulating the pressure of the compressed air, which is supplied from said air supply source to the tire, to a testing air pressure;
a pressure detection unit for detecting an air pressure to be exerted on the inside of the tire by the supply of the compressed air; and
a volume adjustment mechanism connected to an airflow path between the inside of the tire and said pressure regulating valve, said volume adjustment mechanism increasing/decreasing, according to variation of the air pressure, the volume of the compressed air that exerts pressure on the inside of the tire, which is pressure-regulated by said pressure regulating valve.
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Accused Products
Abstract
A pneumatic circuit whereby small amounts of variations in pneumatic pressure in a tire occurring during tire testing can be adjusted in a short time. The pneumatic circuit includes an air supply source which generates compressed air to be supplied to a tire retained in a tire testing device; a pressure regulating valve which regulates the pressure of the compressed air generated; a discharge/supply valve provided downstream of the pressure regulating valve and by which compressed air is supplied to, or discharged from, the tire; a pressure detection unit provided downstream of the discharge/supply valve and which detects the tire pressure inside the tire; and a volume adjustment mechanism provided between the pressure regulating valve and the tire and which increases or decreases the volume of compressed air in an airflow path between the tire and the pressure regulating valve, as well as in the tire.
23 Citations
12 Claims
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1. A pneumatic circuit for tire testing device provided in a tire testing device having a tire holding unit for holding a tire, comprising:
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an air supply source for supplying compressed air to the tire held by the tire holding unit; a pressure regulating valve for regulating the pressure of the compressed air, which is supplied from said air supply source to the tire, to a testing air pressure; a pressure detection unit for detecting an air pressure to be exerted on the inside of the tire by the supply of the compressed air; and a volume adjustment mechanism connected to an airflow path between the inside of the tire and said pressure regulating valve, said volume adjustment mechanism increasing/decreasing, according to variation of the air pressure, the volume of the compressed air that exerts pressure on the inside of the tire, which is pressure-regulated by said pressure regulating valve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A tire testing method for testing a tire held by a tire holding unit, comprising:
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regulating the pressure of compressed air by a pressure regulating valve to a predetermined testing air pressure and testing the tire while exerting the regulated pressure on the inside of the tire; and increasing/decreasing the volume of the compressed air that exerts pressure on the inside of the tire, which is pressure-regulated by the pressure regulating valve, according to minor variation of air pressure inside the tire, which is caused in spite of the regulation by the pressure regulating valve, so as to compensate the variation. - View Dependent Claims (12)
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Specification