Level Control Valve Unit

Level Control Valve Unit






TASK
The valve unit Y36/6 is the central control module for the level control.

LOCATION
On front right longitudinal member

CONNECTIONS OF VALVE UNIT Y36/6






DESIGN AND FUNCTION OF LEVEL CONTROL VALVE UNIT





Design
The valve unit Y36/6 contains a distributor valve (a) for pressure oil control of the front and rear axle to suit requirements. The pressure relief valve (b) with an opening pressure of approx. 180 bar is used to limit pressure. The solenoid valves (Y36/6 yl, y2, y3 and y4) control the raising and lowering of the vehicle. The discharge valve (c) limits the quantity of oil flowing to the oil reservoir (2) it is designed as a basic pressure valve and closes at a basic pressure of approx. 33 bar. The non-return valves (d) lock the pressure channels to the distributor valve (a) during the discharge process.

Function
When the engine is running the pressure oil pump (1) sucks oil out of the oil reservoir (2) and delivers the pressure oil to the distributor valve (a)

If no adjustment of the vehicle level is required, the evenly distributed pressure oil flows back to the oil reservoir (2) via the distributor valve (a) and via the open valves (y1, y2) in the return line (T)

The non-return valves (d) secure the oil pressure in the suspension components of the front and rear axle.

Raising The Vehicle
The solenoid valves (y1, y2) "raising" the front and rear axle are closed and the pressure oil flows from the distributor valve (a) to the suspension components via the non-return valves (d)

The solenoid valves (y3, y4) "lowering" the front and rear axle are located in the basic position and are closed

Lowering The Vehicle
The solenoid valves (y3, y4) "lowering" the front and rear axle are opened and the pressure oil flowing at greater than 33 bar is led back to the oil reservoir via the discharge valve (c) and return line (T)

The non-return valves (d) are closed and the pressure oil supplied by the pressure oil pump (1) flows back into the oil reservoir (2) via the distributor valve (a) and the solenoid valves (y1, y2) which are opened in the basic position.