Valve for limiting the pressure in a crankcase

Abstract

A valve for limiting the pressure in a crankcase of a motor vehicle, comprising a first line and a second line, which can be fluidically connected by a movable body, the body being connected to a rolling diaphragm and, together with the rolling diaphragm, being able to expose or close a flow duct, is characterized in that, with respect to the object of designing and refining a valve of the type mentioned above such that it has a compact construction and allows pressure to be reduced in the crankcase of a motor vehicle with low noise, the rolling diaphragm rolls on a separating element, which is positioned in the flow duct between the first line and second line at least in some regions.

1 . A valve for limiting the pressure in a crankcase of a motor vehicle, comprising a first line and a second line, which can be fluidically connected by a movable body, the body being connected to a rolling diaphragm and, together with the rolling diaphragm, being able to expose or close a flow duct, characterized in that the rolling diaphragm rolls on a separating element, which is positioned in the flow duct between the first line and second line at least in some regions. 
     
     
         2 . The valve according to  claim 1 , wherein the separating element comprises passages. 
     
     
         3 . The valve according to  claim 1 , wherein the separating element is provided with elongated slots, at least some of which extend parallel to the direction of movement of the body. 
     
     
         4 . A valve according to  claim 1 , wherein a woven fabric is incorporated in the rolling diaphragm. 
     
     
         5 . A valve according to  claim 1 , wherein the first body is held in a position that exposes the flow duct at least partially by a spring. 
     
     
         6 . A valve according to  claim 1 , wherein the rolling diaphragm exhibits residual stress, which forces the rolling diaphragm back into a basic position or basic shape after a deflection or deformation out of this basic position or basic shape.