Electropneumatic control module

Patent metadata

Field	Value
Publication number	US-12109985-B2
Application number	US-202217715720-A
Country	US
Kind code	B2
Filing date	Apr 7, 2022
Priority date	Nov 14, 2019
Publication date	Oct 8, 2024
Grant date	Oct 8, 2024

Abstract

An electropneumatic control module has a trailer control unit, which has a trailer brake pressure port and a trailer feed pressure port, a holding brake unit, which has a spring-type actuator port and a holding brake pilot control unit, and an electronic control unit, which switches a holding brake pilot control unit into a ventilation position, wherein a second holding brake pilot control port is connected in pressure-conducting manner to a first holding brake pilot control port and the spring-type actuator port is connectable to a vent. The holding brake unit is connected to a redundancy port and is configured to output a first holding brake pressure at the spring-type actuator port when the holding brake pilot control unit is in the ventilation position and a redundancy pressure is provided. The trailer control unit outputs a brake pressure at the trailer brake pressure port when a redundancy pressure is provided.

First claim

What is claimed is:

1. An electropneumatic control module for an electronically controllable pneumatic brake system of a vehicle including a utility vehicle, the vehicle having at least one spring-type actuator and the electronically controllable pneumatic brake system including a compressed air supply and said electropneumatic control module comprising:
a pneumatic supply port connectable to said compressed air supply for receiving a supply pressure (pV);
a trailer control unit (TCV) including a trailer control valve unit having at least one electropneumatic valve, a trailer brake pressure port and a trailer feed pressure port;
a holding brake unit (EPH) having a spring-type actuator port for said at least one spring-type actuator and having a holding brake pilot control unit with at least one electropneumatic valve;
a first vent;
said holding brake pilot control unit having a first holding brake pilot control port connected to said first vent;
said holding brake pilot control unit further having a second holding brake pilot control port;
an electronic control unit (ECU) configured to cause said holding brake unit (EPH) to switch said holding brake pilot control unit into a ventilation position in response to receipt of an electronic holding signal (S 2 ) and, in said ventilation position, said second holding brake pilot control port being connected in pressure-conducting manner to said first holding brake pilot control port and said spring-type actuator port being connectable to said first vent or a second vent;
said holding brake unit (EPH) being connected in a pressure-conducting manner to a redundancy port and is configured to, in lieu of a connection of said spring-type actuator port to said first vent, output a first holding brake pressure (pF 1 ) at said spring-type actuator port when said holding brake pilot control unit is in said ventilation position and a redundancy pressure (pR) is provided at said redundancy port; and,
said trailer control unit (TCV) being configured to output a brake pressure (pB) at said trailer brake pressure port when said redundancy pressure (pR) is provided at said redundancy port.

2. The electropneumatic control module of claim 1 , wherein said holding brake unit (EPH) is configured to output the first holding brake pressure (pF 1 ) only when said holding brake pilot control unit is in said ventilation position and to output said supply pressure (pV) when said holding brake pilot control unit is switched into an open position.

3. The electropneumatic control module of claim 1 , wherein the spring-type actuator port is connected to said first vent when no redundancy pressure (pR) is provided at said redundancy port and said holding brake pilot control unit is in said ventilation position.

4. The electropneumatic control module of claim 1 , wherein:
said holding brake unit (EPH) further comprises a shuttle valve having a first shuttle valve port, a second shuttle valve port and a third shuttle valve port;
said first shuttle valve port is connected to said redundancy port for receiving said redundancy pressure (pR);
said second shuttle valve port is connected to said holding brake pilot control unit for receiving a pilot control pressure (pVS); and,
said shuttle valve is configured to provide in each case the higher out of said redundancy pressure (pR) and said pilot control pressure (pVS) at said third shuttle valve port.

5. The electropneumatic control module of claim 4 , wherein said holding brake unit (EPH) further has a first relay valve having a control port connected to said third shuttle valve port and has a working port connected to said spring-type actuator port.

6. The electropneumatic control module of claim 1 , further comprising a parking brake valve unit having a first pneumatically controlled switching valve having a first pneumatic control port for receiving a first pneumatic control pressure (pS 1 ); and, wherein, when said spring-type actuator port is connected to said first vent, said pneumatically controlled switching valve is so switched that the supply pressure (pV) can be output at said trailer brake pressure port.

7. The electropneumatic control module of claim 6 , wherein said first pneumatic control pressure (pS 1 ) is the pressure at the spring-type actuator port.

8. The electropneumatic control module of claim 6 , wherein said pneumatically controlled switching valve is configured as a pneumatically controlled 3/2 directional valve with a first port, a second port and a third port.

9. The electropneumatic control module of claim 8 , wherein said first port of the pneumatically controlled 3/2 directional valve is connected to said redundancy port and said second port of said pneumatically controlled 3/2 directional valve is connected to said pneumatic supply port.

10. The electropneumatic control module of claim 9 , wherein said third port of the pneumatically controlled 3/2 directional valve is connected to a redundancy valve of said trailer control valve unit of said trailer control unit (TCV).

11. The electropneumatic control module of claim 1 , wherein said trailer control valve unit of said trailer control unit (TCV) has a redundancy valve; and, said redundancy port is pneumatically connected to a first redundancy valve port.

12. The electropneumatic control module of claim 11 , further comprising a parking brake valve unit, wherein said electronic control unit (ECU) is configured to cause said parking brake valve unit, on the basis of an electronic holding signal, to switch at least one valve of the parking brake valve unit so as to cause a pneumatic connection between said trailer feed pressure port and said supply port to be interrupted.

13. The electropneumatic control module of claim 12 , wherein the parking brake valve unit has a second pneumatically controlled switching valve having a second pneumatic control port for receiving a second pneumatic control pressure (pS 2 ); and, when said second control pressure (pS 2 ) undershoots a second limit pressure (pG 2 ), said second pneumatically controlled switching valve is switched such that the pneumatic connection between said trailer feed pressure port and said supply port is interrupted.

14. The electropneumatic control module of claim 13 , wherein said second pneumatically controlled switching valve is configured as a pneumatically controlled 3/2 directional valve with a second port, a third port and a fourth port; said second port is connected to said trailer feed pressure port; said third port is connected to said supply port; and, said fourth port is connected to said first vent or said second vent.

15. The electropneumatic control module of claim 13 , wherein said trailer control unit (TCV) has a third pneumatically controlled switching valve having a third pneumatic control port for receiving a third pneumatic control pressure (pS 3 ); and, said third pneumatic control port of said third pneumatically controlled switching valve is connected in pressure-conducting manner to said second pneumatic control port of the second pneumatic switching valve.

16. The electropneumatic control module of claim 15 , wherein said third pneumatically controlled switching valve is configured to provide a trailer control pressure at said trailer brake pressure port when said third control pressure (pS 3 ) overshoots a third limit pressure (pG 3 ).

17. The electropneumatic control module of claim 1 , wherein said electronic control unit (ECU), said trailer control unit (TCV) and said holding brake unit (EPH) are integrated in one module.

18. The elect

Assignees

• Zf Cv Systems Europe Bv

Inventors

• Klostermann Thilo
• Van Thiel Julian

Classifications

• B60T2270/88

  Pressure measurement in brake systems · CPC title

• B60T2270/413

  Plausibility monitoring, cross check, redundancy · CPC title

• B60T13/683

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

• B60T8/171

  Detecting parameters used in the regulation; Measuring values used in the regulation · CPC title

• B60T8/1708

  for lorries or tractor-trailer combinations · CPC title