The LSV is fixed to the vehicle chassis with two M 8 bolts. The vent must point downwards. The pneumatic lines have to be connected according to the Port markings 1, 2, 41, 42. The values of the settings have to be stamped on the accompanying LSV information plate Part. No. 028 0280 09.

The information plate must not be capable of becoming detached and must be attached to the vehicle where it is easily visible (German road traffic licensing regulation: StVZO - SP - Rili. - 2.5).

Function

Pneu LSV Internal WITH id1 fUNCTION.png

The connectors 41 and 42 of the actuating cylinder are attached to the connecting lines of the pneumatic suspension valves/bellows on the right and left sides of the vehicle. The pistons in the actuating cylinder are held in the end position when the vehicle is empty (suspension pressure empty connections 41, 42).

When the vehicle is loaded and the pressure rises at the connections 41 and 42, the control pistons and the slider 1 attached to them by the connecting rod are shifted to the right which results in a change in the effective movement translation ratio. The translation movement between the pistons and balance arm is so adjusted that with suspension pressure empty the control inlet brake pressure P1 at connection 1 is transferred to the outlet control pressure at connection 2 but reduced by the pressure ratio iR.

The system is normally designed so that in the laden position the controlled inlet pressure in connection 1 remains unmodified, i.e. the controlled outlet pressure at connection 2 is in 1:1 relation to it.

The LSV is fitted with a proportional control characteristic that has a start pressure control (pD) of approx. 0.4 bar in the uncontrolled range to overcome the start force (valves, wheel brakes) The LSV works “statically”, i.e. a change in the pressure ratio, e.g. from a change in suspension pressure following a change in axle loading, is suppressed during braking.

funct diagramm pneu LSV.PNG

Maintenance

Function and leak test
Check that P2 unladen and P2 laden correspond to the data on the LSV instruction plate.
It is mandatory that the LSV be so mounted that it is in a vertical position and the vent point downwards during examination and adjustment

Simulation connection

Variable installation (good access)
Makes it possible to test to EG/ECE as well as the German § 29 StVZO