Valve Body Test Machine VBTM-K is designed for testing and diagnostics of valve body (VB) of an automatic gearbox.

This machine emulates the operation of an automatic transmission by means of an electronic controller and supplies voltage to the valve body solenoids, according to the prescribed gear shift programs. Then the readings of the outlet pressure are taken from each channel, graphs are formed, displaying the deviation of the pressure of the tested VB from the reference (new VB). The testing process is carried out with an ATF working fluid heated to operating temperatures and at different inlet pressures. This eliminates the error that occurs when the ATF viscosity changes at different temperatures. Graphs with new VB benchmarks are pre-loaded into the software shell.
Graphs with new VB benchmarks are pre-loaded into the software shell.

Sequence of work:
1. The valve body is placed on the testing plate; sensors are connected to the output channels and the operator starts the first test (full cycle of automatic transmission operation).
2. The set of tests is repeated for different values of inlet pressure.
3. Upon completion of testing, a graph with the test result is displayed on the screen.

Please note: the VBTM-K diagnostic stand produces a specific algorithm that the valve body must perform. At the same time, the VBTM-K diagnostic stand can emulate the operation of certain valve body units in extreme modes, checking them for reliability and absence of malfunctions, “stress test”. Pressure sensors are installed on the output oil lines coming from the valve body, which take readings at each unit of time.