초록 ▼

An apparatus for monitoring and controlling the tire inflation pressure in a tire testing machine comprises first and second measuring rim portions for mounting a tire therebetween, and a pressure sensor operable to detect the inflation pressure of the tire. The pressure sensor has a pressure-receiv

An apparatus for monitoring and controlling the tire inflation pressure in a tire testing machine comprises first and second measuring rim portions for mounting a tire therebetween, and a pressure sensor operable to detect the inflation pressure of the tire. The pressure sensor has a pressure-receiving surface which is arranged to directly detect the pressure in the interior of the tire. The pressure sensor rotates with the tire in a tire testing run. A spindle connected to the measuring rim portions and rotatable therewith has conduit means for supplying compressed air to inflate the tire. A control means is operable to close off the conduit means, thereby constituting a closed volume of air defined by the space within the tire, the space between the measuring rim portions holding the tire, and the conduit means in the spindle, that volume of air rotating as a unit with the components defining same, during a tire testing operation.

대표청구항 ▼

Apparatus for monitoring and controlling the inflation pressure of a pneumatic tire to be tested in a tire testing machine, comprising: first and second rim portions which are rotatable about a common axis, for receiving the tire to be tested between them, thereby delimiting a pressure chamber forme

Apparatus for monitoring and controlling the inflation pressure of a pneumatic tire to be tested in a tire testing machine, comprising: first and second rim portions which are rotatable about a common axis, for receiving the tire to be tested between them, thereby delimiting a pressure chamber formed by the interior of the tire and the intermediate space between the measuring rim portions; means for relative axial displacement of the measuring rim portions; a spindle connected to and adapted to rotate with a said measuring rim portion; a stationary compressed air source; a compressed air conduit means disposed rotatably with the spindle and the measuring rim portions, for feeding compressed air for inflating the tire from the compressed air source and passing same into said pressure chamber; a pressure sensor mounted rotatably with the measuring rim portions and having at least one pressure-receiving surface operatively disposed in said pressure chamber, thereby to be directly subjected to the effect of the inflation pressure in the pressure chamber; a closure means adapted to rotate with said spindle and said measuring rim portions and actuable between an open position in which air can pass through said compressed air conduit means and a closed position in which said compressed air conduit means is closed thereby; and a control means adapted to control the feed of compressed air by way of the compressed air conduit means into the pressure chamber in dependence on the air pressure detected in said pressure chamber by the pressure sensor, said control means being operable to actuate said closure means in response to the inflation pressure in said pressure chamber as the control parameter for the control means.