公开(公告)号：EP0672003A1

公开(公告)日：1995-09-20

申请号：EP94902638.0

申请日：1993-11-30

Applicant: Danfoss A/S

Inventor： FRIEDRICHSEN, Welm

IPC: F15B11 ,  F15B13 ,  F15B21 ,  G05D7

CPC classification number: F15B13/0416 ,  F15B11/05 ,  F15B21/08 ,  F15B2211/20553 ,  F15B2211/30535 ,  F15B2211/329 ,  F15B2211/6051 ,  F15B2211/6054 ,  F15B2211/6313 ,  F15B2211/652 ,  F15B2211/653 ,  F15B2211/654 ,  F15B2211/665 ,  F15B2211/6653 ,  F15B2211/67

Abstract: A controlled proportional valve is provided, with a main slide valve section (4) containing a main slide valve, which section controls a flow of fluid between a pump connection (P) connected to a pump (2) and a tank connection (T) connected to a tank (6) and two work connections connected to a load (5) and which generates a load-sensing signal (LSINT) in dependence on the pressures at the work connections (A, B), and with a compensating slide valve section (3) which controls the pressure across the main slide valve section (4) in dependence on the load-sensing signal (LSINT). It is desirable to achieve a more rapid response time in a proportional valve of that kind, wherein the control means should be capable of being retroffited in existing proportional valves. To that end, a control arrangement (10) which controls the pressure of the load-sensing signal (LSINT) to influence the actual volume flow and/or the actual pressure in the work connections (A, B) is provided.