US 10,471,942 B2Granted

Valve unit for modulating pressure in a compressed-air brake system

AssigneeWABCO Europe BVBA

InventorsRafal Bialon, Andreas Teichmann

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Abstract

A valve unit for modulating pressure in a compressed-air brake system comprises an inlet valve (6) and an outlet valve (7) configured as diaphragm valves, a brake pressure output (4) configured to be connected to or shut off from a brake pressure input (3) or a vent output (5), two pilot valves (8, 9) configured as 3/2-way solenoid valves, and a respective control chamber (31, 32) adjacent to the diaphragm (17, 18) of the diaphragm valves (6, 7). The diaphragms (17, 18) are each clamped between two housing parts (11, 14; 11′, 14′) via a respective ring bead (22, 23) placed in a housing-side ring groove (20, 21; 20′, 21′). In order to avoid damaging the diaphragms (17, 18), an annular continuous or partially interrupted recess (54) is arranged in the ring groove (20, 21) or immediately adjacent to the ring groove to receive displaced bead material from the diaphragm (17).

Claims11

Dependent claims

A valve unit for modulating pressure in a compressed-air brake system, the valve unit comprising:

an inlet valve (6) and an outlet valve (7), the inlet valve and the outlet valve being configured as diaphragm valves, each of the diaphragm valves having a diaphragm (17, 18),
a brake pressure output (4) configured to be connected to or shut off from a brake pressure input (3) or a vent output (5),
two pilot valves (8, 9) configured as 3/2-way solenoid valves,
a respective control chamber (31, 32) adjacent to the diaphragm (17, 18) of each of the diaphragm valves (6, 7), the control chamber (31, 32) being configured to be pressurized with a control pressure via a control pressure line (33, 34),
wherein the diaphragm valves (6, 7) are arranged with parallel actuation axes (15, 16) and radially adjacent to each other in a valve housing (2), and the diaphragms (17, 18) of the diaphragm valves (6, 7) are each clamped between two housing parts (11, 14;
11′, 14′) via a respective ring bead (22, 23) placed in a housing-side ring groove (20, 21;
20′, 21′) and oriented axially on a pilot valve side,
wherein an annular continuous recess (54, 60, 64, 67, 71, 71′) or a partially interrupted recess is arranged in the ring groove (20, 21;
20′, 21) or immediately adjacent to the ring groove (20, 21;
20′, 21′) of at least one of the diaphragm valves (6, 7) to receive displaced bead material from the diaphragm (17, 18),
wherein at least one of a radially outer side wall (43″) and a radially inner side wall (45″) of the ring groove (20″) is configured with an oversize or undersize and with axial webs (55, 56) evenly distributed circumferentially and protruding radially into the ring groove (20″) to form the partially interrupted recess (57, 58).

8 more elements

A valve unit for modulating pressure in a compressed-air brake system, the valve unit comprising:

an inlet valve (6) and an outlet valve (7), the inlet valve and the outlet valve being configured as diaphragm valves, each of the diaphragm valves having a diaphragm (17, 18),
a brake pressure output (4) configured to be connected to or shut off from a brake pressure input (3) or a vent output (5),
two pilot valves (8, 9) configured as 3/2-way solenoid valves,
a respective control chamber (31, 32) adjacent to the diaphragm (17, 18) of each of the diaphragm valves (6, 7), the control chamber (31, 32) being configured to be pressurized with a control pressure via a control pressure line (33, 34),
wherein the diaphragm valves (6, 7) are arranged with parallel actuation axes (15, 16) and radially adjacent to each other in a valve housing (2), and the diaphragms (17, 18) of the diaphragm valves (6, 7) are each clamped between two housing parts (11, 14;
11′, 14′) via a respective ring bead (22, 23) placed in a housing-side ring groove (20, 21;
20′, 21′) and oriented axially on a pilot valve side,
wherein an annular continuous recess (54, 60, 64, 67, 71, 71′) or a partially interrupted recess is arranged in the ring groove (20, 21;
20′, 21) or immediately adjacent to the ring groove (20, 21;
20′, 21′) of at least one of the diaphragm valves (6, 7) to receive displaced bead material from the diaphragm (17, 18),
wherein radial side walls (43*, 45*) of the ring groove (20*) and a groove base (44*) of the ring groove (20*) are arranged in the housing part (14*) on the pilot valve side, wherein the radial side walls (43*, 45*) of the ring groove (20*) and outer walls of the ring bead (22*) of the diaphragm (17′) slope axially convergently in a direction of the housing part (14*) on the pilot valve side, and wherein an axial depth of the ring groove (20*) exceeds an axial height of the ring bead (22*) to form the annular continuous recess (60).

8 more elements

A valve unit for modulating pressure in a compressed-air brake system, the valve unit comprising:

an inlet valve (6) and an outlet valve (7), the inlet valve and the outlet valve being configured as diaphragm valves, each of the diaphragm valves having a diaphragm (17, 18),
a brake pressure output (4) configured to be connected to or shut off from a brake pressure input (3) or a vent output (5),
two pilot valves (8, 9) configured as 3/2-way solenoid valves,
a respective control chamber (31, 32) adjacent to the diaphragm (17, 18) of each of the diaphragm valves (6, 7), the control chamber (31, 32) being configured to be pressurized with a control pressure via a control pressure line (33, 34),
wherein the diaphragm valves (6, 7) are arranged with parallel actuation axes (15, 16) and radially adjacent to each other in a valve housing (2), and the diaphragms (17, 18) of the diaphragm valves (6, 7) are each clamped between two housing parts (11, 14;
11′, 14′) via a respective ring bead (22, 23) placed in a housing-side ring groove (20, 21;
20′, 21′) and oriented axially on a pilot valve side,
wherein an annular continuous recess (54, 60, 64, 67, 71, 71′) or a partially interrupted recess is arranged in the ring groove (20, 21;
20′, 21) or immediately adjacent to the ring groove (20, 21;
20′, 21′) of at least one of the diaphragm valves (6, 7) to receive displaced bead material from the diaphragm (17, 18),
wherein each housing part (11′) facing away from the pilot valves (8, 9) has a stepped edge groove (68, 74), the stepped edge groove (68, 74) having a radially inner groove portion (69, 75) receiving flushly a supporting disk (42) for the diaphragm (17), and the stepped edge groove (68, 74) having an adjacent radially outer groove portion (70, 77) enclosing the ring bead (22) of the diaphragm (17) axially and radially on one side and delimiting the annular continuous recess (71, 71′).

8 more elements

A valve unit for modulating pressure in a compressed-air brake system, the valve unit comprising:

an inlet valve (6) and an outlet valve (7), the inlet valve and the outlet valve being configured as diaphragm valves, each of the diaphragm valves having a diaphragm (17, 18),
a brake pressure output (4) configured to be connected to or shut off from a brake pressure input (3) or a vent output (5),
two pilot valves (8, 9) configured as 3/2-way solenoid valves,
a respective control chamber (31, 32) adjacent to the diaphragm (17, 18) of each of the diaphragm valves (6, 7), the control chamber (31, 32) being configured to be pressurized with a control pressure via a control pressure line (33, 34),
wherein the diaphragm valves (6, 7) are arranged with parallel actuation axes (15, 16) and radially adjacent to each other in a valve housing (2), and the diaphragms (17, 18) of the diaphragm valves (6, 7) are each clamped between two housing parts (11, 14;
11′, 14′) via a respective ring bead (22, 23) placed in a housing-side ring groove (20, 21;
20′, 21′) and oriented axially on a pilot valve side,
wherein an annular continuous recess (54, 60, 64, 67, 71, 71′) or a partially interrupted recess is arranged in the ring groove (20, 21;
20′, 21) or immediately adjacent to the ring groove (20, 21;
20′, 21′) of at least one of the diaphragm valves (6, 7) to receive displaced bead material from the diaphragm (17, 18),
wherein each housing part (11′) facing away from the pilot valves (8, 9) has an edge groove (61′) with a single step, the edge groove (61′) having a radially inner groove portion (62′) holding a supporting disk (42) for the diaphragm (17), and the edge groove (61′) having a radially outer groove portion (63′) surrounding the ring bead (22) of the diaphragm (17) axially and radially on one side, the inner groove portion (62′) having a radial side wall (66) with a height less than a thickness (65) of the supporting disk (42) such that the radially outer groove portion (63′) delimits the annular continuous recess (67).

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/777,849Filed 7 Nov 2016
Priority: DE 10 2015 016 26515 Dec 2015
Published: US 2018/0345926 A16 Dec 2018
Granted: 12 Nov 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

B60T 8/3605
Including a pilot valve responding to an electromagnetic force: wherein the pilot valve is mounted in a circuit controlling the working fluid system
F16K 7/17
Arranged to be deformed against a flat seat: the diaphragm being actuated by fluid pressure
F16K 31/1262
The fluid acting on a diaphragm, bellows, or the like: one side of the diaphragm being spring loaded
F16K 31/1266
The fluid acting on a diaphragm, bellows, or the like: one side of the diaphragm being acted upon by the circulating fluid