Patent ID: 7905249
Filing Date: 2011-03-15
Classification: F16H,F16K,G05D,Y10T

Abstract:
1. An electromagnetic proportional pressure-control valve ( 1 ) in a vehicle transmission, comprising at least a magnet part ( 2 ), a hydraulic part ( 3 ) and a spring element ( 4 ) in the operative connection between the magnet part ( 2 ) and the hydraulic part ( 3 ), the magnet part ( 2 ) comprises at least one coil ( 5 ), an armature ( 6 ) and an armature bar ( 7 ), and the hydraulic part ( 3 ) comprises at least a first closing element ( 8 ) and a second closing element ( 9 ), the first closing element ( 8 ) forms a flat seat ( 10 ) which encloses a first aperture and the second closing element ( 9 ) forms a ball seat ( 11 ), the first closing element ( 8 ) and the second closing element ( 9 ) are opened and closed via a tappet rod ( 12 ), the second closing element ( 9 ) is closed when no electricity is applied to the pressure-control valve ( 1 ) and a maximum gap (ü) in the flat seat ( 10 ) is larger than one seventh of a nominal width (NW) of the first aperture; a second closure area (A_ a diameter(s) of the tappet rod (