Parking brake valve device

Inventor: Julian van Thiel (Grossburgwedel, DE)

Assignee: ZF CV SYSTEMS EUROPE BV

B60T15/041 B60T15/027

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Quick Facts

Patent No.: US 11,260,843
App. No.: 16/642,383
Granted: Mar 1, 2022
Kind: B2

External Links

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Abstract

A parking brake valve device for controlling a storage spring parking brake in an electropneumatic brake system includes a compressed air input configured to be connected to a compressed air supply, a parking brake output configured to control a storage spring parking brake, and a trailer-control control output configured to control a trailer control valve (TCV) for a trailer brake system. The parking brake valve device further includes a relay valve pilot control region and a relay valve, a TCV pilot control region configured to control the trailer-control control output, an inlet valve configured to be controlled with a first electrical control signal for supplying air to the TCV pilot control region and the relay valve pilot control region, and a connecting valve configured to be controlled by a second control signal to connect and disconnect the TCV pilot control region and the relay valve pilot control region.

Claims (58)

1. A parking brake valve device for controlling a storage spring parking brake in an electropneumatic brake system, wherein the parking brake valve device comprises:

a compressed air input configured to be connected to a compressed air supply;

a parking brake output configured to control the storage spring parking brake;

a trailer-control control output configured to control a trailer control valve (TCV) for a trailer brake system, the trailer-control control output being configured to be supplied with air for releasing the trailer brake system;

a relay valve pilot control region and a relay valve configured to be controlled by the relay valve pilot control region, which connects the compressed air input to the parking brake output when in an operated position and which vents the parking brake output when in a non-operated position;

a TCV pilot control region configured to control the trailer-control control output;

an inlet valve configured to be controlled with a first electrical control signal for supplying air to the TCV pilot control region and the relay valve pilot control region; and

a connecting valve configured to be controlled by a second control signal to connect and disconnect the TCV pilot control region and the relay valve pilot control region;

wherein the following settings are configured to be set by setting only the inlet valve and the connecting valve:

a driving setting with the parking brake output supplied with air and the trailer-control control output supplied with air,

a parking setting with the parking brake output vented and the trailer-control control output vented, and

a trailer control setting with the parking brake output vented and the trailer-control control output supplied with air; and

wherein the connecting valve is configured to connect, in the driving setting and the parking setting, the TCV pilot control region and the relay valve pilot control region.

2. The parking brake valve device as claimed in claim 1 , wherein the inlet valve is an electrically controlled 2/2 check valve.

3. The parking brake valve device as claimed in claim 2 , wherein the inlet valve is a self-locking 2/2 check valve.

4. The parking brake valve device as claimed in claim 1 , wherein the TCV pilot control region is directly connected to the TCV control output.

5. The parking brake valve device as claimed in claim 1 , wherein the TCV pilot control region is connected to the trailer control output via a select-high valve,

wherein the select-high valve is connected to the parking brake output for compressed air control of the trailer-control control output in case of actuation of the relay valve by the relay valve pilot control region and/or compressed air actuation of the TCV pilot control region.

6. The parking brake valve device as claimed in claim 1 , wherein the TCV pilot control region is connected to the trailer-control control output via a TCV control valve, the TCV control valve being a switching valve that can be pneumatically controlled depending on the TCV pilot control region, which is configured to connect the trailer control output to the parking brake output when the pressure is below the switching pressure in the TCV pilot control region and is configured to connect the trailer-control output to the TCV pilot control region above the switching pressure.

7. An electropneumatic brake system, comprising:

a parking brake valve device as claimed in claim 1 ;

an electronic control device configured to output the first electrical control signal to the inlet valve and the second electrical control signal to the connecting valve for setting the driving setting or the parking setting or the trailer control setting;

the storage spring parking brake connected to the parking brake output; and

the trailer control valve connected to the trailer-control control output for controlling the trailer brake system, wherein the trailer control valve is configured to vent the trailer brake system when the trailer-control control output is supplied with air and is configured to supply the trailer brake system with air when the trailer-control control output is vented.

8. A parking brake valve device for controlling a storage spring parking brake in an electropneumatic brake system, wherein the parking brake valve device comprises: