PNEUMATIC CIRCUIT FOR TIRE TESTING DEVICE, TIRE TESTING DEVICE, AND TIRE TESTING METHOD

摘要

Provided is a pneumatic circuit (1) whereby very small amounts of variations in the pneumatic pressure in a tire which occur during tire testing can be adjusted in a short time. This pneumatic circuit (1) is equipped with an air supply source (10) which generates compressed air to be supplied to a tire (T) retained in a tire testing device (2); a pressure regulating valve (13) which regulates the pressure of the compressed air generated; a discharge/supply valve (14) which is provided downstream of the pressure regulating valve (13) and by which compressed air is supplied to, or discharged from, the tire (T); a pressure detection unit (17) which is provided downstream of the discharge/supply valve (14) and which detects the tire pressure inside the tire (T); and a volume adjustment mechanism (21) which is provided between the pressure regulating valve (13) and the tire (T) and which increases or decreases the volume of compressed air in an airflow path between the tire (T) and the pressure regulating valve (13), as well as in the tire (T).