Title:
PNEUMATIC CONTROL VALVE COMPRISING SEVERAL C-PISTONS
Document Type and Number:
WIPO Patent Application WO/2012/038278
Kind Code:
A3
Abstract:
The invention relates to a pneumatic control valve as an actuator for a regulated application of compressed air to a brake cylinder (8), which can be connected to a valve housing (1) via a C-port (7), in accordance with a pressure difference between a control pressure supplied by an S-port (3) and a reference pressure which is supplied via an A-port (4) and acts in the opposite direction on a control piston (2). According to the invention, said control piston, in cooperation with at least one pressure spring (5), actuates a double-seat valve (6) either for connecting the C-port (7) to an O-port (9) for discharging air or for connecting the C-port (7) to an R-port (10) for ventilation. Several additional C-pistons (12a, 12b), which cooperate with the control piston (2) and can be alternatively selected, are provided for adjusting several brake pressure levels, wherein a first C-piston (12a) having a smaller diameter and an associated C1-port (13a) is arranged on the piston rod (11), which actuates the double-seat valve (9), at a distance from a second C-port (12b) having a larger diameter and an associated C2-port (13b), wherein a first brake pressure level can be adjusted by subjecting the first C-piston (12a) to a brake cylinder pressure, a second brake pressure level can be adjusted by subjecting the second C-piston (12b) to a brake cylinder pressure and a third brake pressure level can be adjusted by subjecting both C-pistons (12a, 12b) to the brake cylinder pressure.
Inventors:
CZYPIONKA SIMON (DE)
KRUSCHE MICHAEL (DE)
SIMON TIMM (DE)
HELLER MARTIN (DE)
PETTER THOMAS (DE)
KRUSCHE MICHAEL (DE)
SIMON TIMM (DE)
HELLER MARTIN (DE)
PETTER THOMAS (DE)
Application Number:
PCT/EP2011/065715
Publication Date:
May 24, 2012
Filing Date:
September 12, 2011
Export Citation:
Assignee:
KNORR BREMSE SYSTEME (DE)
CZYPIONKA SIMON (DE)
KRUSCHE MICHAEL (DE)
SIMON TIMM (DE)
HELLER MARTIN (DE)
PETTER THOMAS (DE)
CZYPIONKA SIMON (DE)
KRUSCHE MICHAEL (DE)
SIMON TIMM (DE)
HELLER MARTIN (DE)
PETTER THOMAS (DE)
International Classes:
B60T15/30; B60T15/24
Foreign References:
US2940799A | 1960-06-14 |
Attorney, Agent or Firm:
SCHOENMANN, Kurt (Moosacher Str. 80, München, DE)
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