Integrated trailer control module with external electro-pneumatic parking brake unit

Patent metadata

Field	Value
Publication number	US-11807208-B2
Application number	US-201816494357-A
Country	US
Kind code	B2
Filing date	Mar 20, 2018
Priority date	Mar 21, 2017
Publication date	Nov 7, 2023
Grant date	Nov 7, 2023

Abstract

An electropneumatic trailer control module (1) for an electronically controllable pneumatic brake system (520) for a vehicle combination (500) with a tractor vehicle (502) and a trailer vehicle (504), has an electronic control unit (ECU), a pneumatic reservoir input (11), a trailer control valve unit (65) with electropneumatic valves (RV, IV, OV), a trailer brake pressure port (22), and a trailer supply pressure port (21). The electronic control unit (ECU) has a parking brake signal input (200) for receiving an electronic brake representation signal (SB1, SB2, SB3) for an immobilizing brake (6, 532a, 532b) of the tractor vehicle (502) and is configured to, on the basis of the brake representation signal (SB1, SB2, SB3), switch at least one of the one or more electropneumatic valves (RV, IV, OV) of the trailer control valve unit (65) in order to output a brake pressure.

First claim

The invention claimed is:

1. An electropneumatic trailer control module ( 1 ) for an electronically controllable pneumatic brake system ( 520 ) for a vehicle combination ( 500 ) with a tractor vehicle ( 502 ) and a trailer vehicle ( 504 ), the electropneumatic trailer control module ( 1 ) comprising:
an electronic control unit (ECU),
a pneumatic reservoir input ( 11 ), which is connectable to a compressed-air reservoir ( 525 ),
a trailer control valve unit ( 65 ) with one or more electropneumatic valves (RV, IV, OV),
a trailer brake pressure port ( 22 ), and a trailer supply pressure port ( 21 ),
wherein the electronic control unit (ECU) has a parking brake signal input ( 200 ) and receives an electronic brake representation signal (SB 1 , SB 2 , SB 3 ) representing an actuation of an immobilizing brake ( 6 , 532 a , 532 b ) of the tractor vehicle ( 502 ), wherein
the electronic control unit (ECU) switches at least one valve (IV) of the one or more electropneumatic valves (RV, IV, OV) of the trailer control valve unit ( 65 ) based on the received brake representation signal (SB 1 , SB 2 , SB 3 ) and outputs a brake pressure (PB) at the trailer brake pressure port ( 22 ), and
further comprising a relay valve ( 20 ) including a relay valve working input ( 23 ) connected to the reservoir input ( 11 ), a relay valve output ( 24 ) connected to the trailer brake pressure port ( 22 ), and a relay valve control input ( 25 ) opening into a common inner control chamber ( 100 ), wherein the relay valve selectively directs a service brake control pressure (P 1 ) or a redundancy pressure (PR) into the common inner control chamber ( 100 ).

2. The electropneumatic trailer control module ( 1 ) as claimed in claim 1 , wherein the trailer control valve unit ( 65 ) has at least one inlet valve (IV) with a first inlet valve port ( 67 a ) and with a second inlet valve port ( 67 b ), wherein the first inlet valve port ( 67 a ) is connected to the reservoir input ( 11 ) and the electronic control unit (ECU) switches the inlet valve (IV) based on the received brake representation signal (SB 1 , SB 2 , SB 3 ) and outputs the brake pressure (PB) at the trailer brake pressure port ( 22 ).

3. The electropneumatic trailer control module ( 1 ) as claimed in claim 1 , wherein the electronic control unit (ECU) receives the brake representation signal (SB 1 ) from a further control unit.

4. The electropneumatic trailer control module ( 1 ) as claimed in claim 3 , wherein the further control unit is an electronic control unit of an immobilizing brake unit ( 541 ) providing an immobilizing brake pressure to the immobilizing brake ( 6 , 532 a , 532 b ) of the tractor vehicle ( 502 ).

5. The electropneumatic trailer control module ( 1 ) as claimed in claim 3 , wherein the further control unit is a central module ( 527 ).

6. The electropneumatic trailer control module ( 1 ) as claimed in claim 1 , wherein the parking brake signal input ( 200 ) is connected to a pressure sensor ( 208 , 209 , 212 ), and wherein the electronic control unit (ECU) receives the electronic brake representation signal (SB 2 , SB 3 ) from the pressure sensor ( 208 , 209 , 212 ).

7. The electropneumatic trailer control module ( 1 ) as claimed in claim 6 , further comprising a parking brake pressure input ( 43 ) that receives an immobilizing brake pressure (PP) of the immobilizing brake ( 6 , 532 a , 532 b ) of the tractor vehicle ( 502 ).

8. The electropneumatic trailer control module ( 1 ) as claimed in claim 7 , wherein the pressure sensor ( 208 , 212 ) detects the immobilizing brake pressure (PP) at the parking brake pressure input ( 43 ) and is connected to the parking brake signal input ( 200 ) and provides an electronic pressure signal (SDi) as a brake representation signal (SB 3 ) at the electronic control unit (ECU).

9. The AR electropneumatic trailer control module ( 1 ) as claimed in claim 1 ,
wherein the parking brake signal input ( 200 ) is connected to a pressure sensor ( 208 , 209 , 212 ), and wherein the electronic control unit (ECU) receives the electronic brake representation signal (SB 2 , SB 3 ) from the pressure sensor ( 208 , 209 , 212 ), and
further comprising a parking brake valve unit ( 12 ), having a pneumatically controlled switching valve ( 13 ) which has a pneumatic control input ( 15 ) that receives a pneumatic control pressure (P 3 ), wherein, when the parking brake pressure input ( 43 ) is ventilated, the pneumatically controlled switching valve ( 13 ) is switched and directs the brake pressure (PB) to the trailer brake pressure port ( 22 ).

10. The electropneumatic trailer control module as claimed in claim 9 , wherein the pneumatic control pressure (P 3 ) is an immobilizing brake pressure (PP) of the immobilizing brake ( 6 , 532 a , 532 b ) or a trailer parking brake pressure of a parking brake valve.

11. The electropneumatic trailer control module as claimed in claim 9 , wherein the pneumatic control pressure (P 3 ) is an immobilizing brake control pressure in an upstream pilot-control unit of an immobilizing brake unit ( 541 ) providing an immobilizing brake pressure to the immobilizing brake ( 6 , 532 a , 532 b ) of the tractor vehicle ( 502 ).

12. The electropneumatic trailer control module ( 1 ) as claimed in claim 9 , further comprising a redundancy pressure port ( 42 ) with a first redundancy pressure line ( 16 ), and wherein the pneumatically controlled switching valve ( 13 ) is connected to a second redundancy pressure line ( 17 ), to which the first redundancy pressure line ( 16 ) is also connected, such that, when the pneumatically controlled switching valve ( 13 ) is switched, a pressure is directed to the second redundancy pressure line ( 17 ).

13. The electropneumatic trailer control module ( 1 ) as claimed in claim 12 , wherein a pneumatic control output ( 528 a ) of a brake transducer ( 528 ) is connected to the redundancy pressure port ( 42 ).

14. The electropneumatic trailer control module ( 1 ) as claimed in claim 12 , wherein a third redundancy pressure line ( 694 ) is connected to the redundancy pressure port ( 42 ) to output a service brake pressure (PBV) at the redundancy pressure port ( 42 ).

15. The electropneumatic trailer control module ( 1 ) as claimed in claim 12 , wherein the pneumatically controlled switching valve ( 13 ) is a 3/2 directional valve ( 14 ) with a first port ( 14 a ), a second port ( 14 b ) and a third port ( 14 c ).

16. The electropneumatic trailer control module ( 1 ) as claimed in claim 15 , wherein the second port ( 14 b ) is connected to the reservoir input ( 11 ) and the first port ( 14 a ) is connected to the redundancy pressure port ( 42 ).

17. The electropneumatic trailer control module ( 1 ) as claimed in claim 15 , wherein the first port ( 14 a ) of the pneumatically controlled 3/2 directional valve ( 14 ) is connected to a pressure sink ( 3 ).

18. The electropneumatic trailer control module ( 1 ) as claimed in claim 15 , wherein the third port ( 14 c ) of the pneumatically controlled switching valve ( 13 ) is connected to a first shuttle valve input ( 18 a ) of a shuttle valve ( 18 ), wherein a second shuttle valve input ( 18 b ) of the shuttle valve ( 18 ) is connected to the redundancy pressure port ( 42 ), and a shuttle valve output ( 18 c ) of the shuttle valve ( 18 ) is connected to the second redundancy pressure line ( 17 ).

19. The electropneumatic trailer control module ( 1 ) as claimed in claim 18 , wherein the shuttle valve ( 18 ) is a select-

Assignees

• Wabco Gmbh
• Zf Cv Systems Europe Bv

Inventors

• Van Thiel Julian

Classifications

• B60T8/362 Primary

  in pneumatic systems (B60T8/3655, B60T8/3675 and B60T8/369 take precedence) · CPC title

• B60T8/1708

  for lorries or tractor-trailer combinations · CPC title

• B60T15/027

  in pneumatic systems · CPC title

• B60T13/683 Primary

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

• B60T13/263

  specially adapted for coupling with dependent systems, e.g. tractor-trailer systems · CPC title