Axle valve module and relay valve module of a compressed-air brake system

Patent metadata

Field	Value
Publication number	US-11511719-B2
Application number	US-201816757781-A
Country	US
Kind code	B2
Filing date	Sep 3, 2018
Priority date	Oct 26, 2017
Publication date	Nov 29, 2022
Grant date	Nov 29, 2022

Abstract

An axle valve module of a compressed air brake system includes a relay valve with a control pressure input connected to a control pressure line which can be connected via a changeover valve alternately to a brake pressure line conducting an introduced brake pressure or to a reservoir pressure line conducting a reservoir pressure. ABS inlet and outlet valves are each formed as a pressure-controlled diaphragm valve with assigned pilot valve, wherein the pilot valves are configured as cyclically controllable 3/2-way magnetic switching valves, A shut-off valve is arranged in the control pressure line of the relay valve, between the changeover valve and the control pressure input of the relay valve or the branch point of a control pressure line of the ABS valves, via which shut-off valve the control pressure present at the control pressure input of the relay valve can be locked in as required.

First claim

What is claimed is:

1. An axle valve module ( 2 ′, 2 ″) for a compressed air brake system for actuating wheel brakes of a vehicle axle of a wheeled vehicle, the axle valve module comprising:
a relay valve ( 26 ), and
a control pressure input ( 36 ) connected to a control pressure line ( 48 ) configured to be alternately connected via a changeover valve ( 50 , 74 ) to a brake pressure line ( 20 , 20 ′) conducting an introduced brake pressure or to a reservoir pressure line ( 14 , 14 ′) conducting a reservoir pressure, and with an ABS inlet valve ( 28 , 32 ) and an ABS outlet valve ( 30 , 34 ) for at least one wheel brake cylinder on each side of the vehicle axle, wherein each of the ABS inlet and outlet valves is formed as a pressure-controlled diaphragm valve with an associated pilot valve ( 62 , 64 , 66 , 68 ), wherein the pilot valves ( 62 , 64 , 66 , 68 ) are configured as cyclically controllable 3/2-way magnetic switching valves configured to load a the control pressure chamber of the associated diaphragm valve ( 28 , 30 , 32 , 34 ) with a control pressure alternatively taken from an axle brake line ( 56 ) connected to a working pressure output ( 40 ) of the relay valve ( 26 ) or from the control pressure line ( 48 ) of the relay valve ( 26 ), or with ambient pressure,
wherein a shut-off valve ( 76 , 78 ) is arranged in the control pressure line ( 48 ) leading to the relay valve ( 26 ), between the changeover valve ( 50 , 74 ) and the control pressure input ( 36 ) of the relay valve ( 26 ) or a branch point of an ABS control pressure line ( 70 ′) for the ABS inlet and outlet valves ( 28 , 30 , 32 , 34 ), the shut-off valve being configured to selectively lock in the control pressure present at the control pressure input ( 36 ) of the relay valve ( 26 );
wherein no bypass pressure line is provided from the relay valve such that the control pressure present at the control pressure input is selectively locked in by the shut-off valve; and
wherein the changeover valve ( 74 ) is configured as a cyclically controllable 3/2-way magnetic switching valve with a non-actuated state and an actuated state, with a first compressed air input to which the brake pressure line ( 20 ′) is connected, with a second compressed air input to which the reservoir pressure line ( 14 ′) is connected, and with a compressed air output to which the control pressure line ( 48 ) of the relay valve ( 26 ) is connected, wherein the first compressed air input is connected to the compressed air output in the non-actuated state and is blocked therefrom in the actuated state, and the second compressed air input is blocked against the compressed air output in the non-actuated state and connected thereto in the actuated state;
wherein the changeover valve is biased toward the non-actuated state.

2. The axle valve module as claimed in claim 1 , wherein the shut-off valve ( 76 ) is configured as a cyclically controllable 2/2-way magnetic switching valve with compressed air input and output, each of which is connected to a portion of the control pressure line ( 48 ) of the relay valve ( 26 ), and which are connected together in a non-actuated state and blocked against each other in an actuated state.

3. The axle valve module as claimed in claim 1 , wherein the changeover valve ( 74 ) is structurally identical to at least one of the shut-off valve ( 78 ), the pilot valves ( 64 , 68 ) of the ABS outlet valves ( 30 , 34 ), and the pilot valves ( 62 , 66 ) of the ABS inlet valves ( 28 , 32 ).

4. An axle valve module ( 2 ′, 2 ″) for a compressed air brake system for actuating wheel brakes of a vehicle axle of a wheeled vehicle, the axle valve module comprising:
a relay valve ( 26 ), and
a control pressure input ( 36 ) connected to a control pressure line ( 48 ) configured to be alternately connected via a changeover valve ( 50 , 74 ) to a brake pressure line ( 20 , 20 ′) conducting an introduced brake pressure or to a reservoir pressure line ( 14 , 14 ′) conducting a reservoir pressure, and with an ABS inlet valve ( 28 , 32 ) and an ABS outlet valve ( 30 , 34 ) for at least one wheel brake cylinder on each side of the vehicle axle, wherein each of the ABS inlet and outlet valves is formed as a pressure-controlled diaphragm valve with an associated pilot valve ( 62 , 64 , 66 , 68 ), wherein the pilot valves ( 62 , 64 , 66 , 68 ) are configured as cyclically controllable 3/2-way magnetic switching valves configured to load a the control pressure chamber of the associated diaphragm valve ( 28 , 30 , 32 , 34 ) with a control pressure alternatively taken from an axle brake line ( 56 ) connected to a working pressure output ( 40 ) of the relay valve ( 26 ) or from the control pressure line ( 48 ) of the relay valve ( 26 ), or with ambient pressure,
wherein a shut-off valve ( 76 , 78 ) is arranged in the control pressure line ( 48 ) leading to the relay valve ( 26 ), between the changeover valve ( 50 , 74 ) and the control pressure input ( 36 ) of the relay valve ( 26 ) or a branch point of an ABS control pressure line ( 70 ′) for the ABS inlet and outlet valves ( 28 , 30 , 32 , 34 ), the shut-off valve being configured to selectively lock in the control pressure present at the control pressure input ( 36 ) of the relay valve ( 26 );
wherein the shut-off valve ( 78 ) is configured as a cyclically controllable 3/2-way magnetic switching valve with two compressed air inputs and one compressed air output, in which the first compressed air input and the compressed air output, each of which is connected to a portion of the control pressure line ( 48 ) of the relay valve ( 26 ), are connected together in a non-actuated state and blocked against each other in an actuated state, and the second compressed air input is permanently blocked.

5. The axle valve module as claimed in claim 4 , wherein the shut-off valve ( 78 ) is structurally identical to the pilot valves ( 64 , 68 ) of the ABS outlet valves ( 30 , 34 ) or the pilot valves ( 62 , 66 ) of the ABS inlet valves ( 28 , 32 ).

Assignees

• Wabco Gmbh

Inventors

• Bialon Rafal
• Otremba Robert
• Schmidt Detlef

Classifications

• B60Y2400/81

  Braking systems · CPC title

• B60T8/4818

  in pneumatic brake systems · CPC title

• B60T2270/10

  ABS control systems · CPC title

• B60T8/361

  wherein the pilot valve is mounted in a circuit controlling an auxiliary fluid system · CPC title

• B60T13/683 Primary

  in pneumatic systems or parts thereof (in vacuum systems B60T13/72) · CPC title