Remote vacuum brake servos

[jamesgritt]

Can anyone tell me the relationship between input fluid presure and displacement vs outlet fluid pressure and displacement in a remote vacuum servo?
As far as I can tell the outlet fluid pressure is the inlet fluid pressure multiplied by the boost ratio (for a set vacuum pressure) but I am unsure of the ratio between the two displacements.

Any help is greatly appreciated

Thanks

James

 

[IceStationZebra]

Basic hydraulic principles would lead one to believe that if you double one you have to halve the other. double the pressure, halve the volume