System and method for braking a vehicle

Patent metadata

Field	Value
Publication number	US-10131336-B2
Application number	US-201615275914-A
Country	US
Kind code	B2
Filing date	Sep 26, 2016
Priority date	Sep 26, 2016
Publication date	Nov 20, 2018
Grant date	Nov 20, 2018

Abstract

A valve includes at least one of an electrical port adapted to receive an electronic control signal and a pneumatic control port adapted to receive a pneumatic control signal. The valve also includes a pneumatic delivery port. The pneumatic delivery port is adapted to transmit a pneumatic fluid, based on the at least one of the received electronic control signal and the received pneumatic control signal, from a second independent source to control i) a second associated service brake and ii) delivery of the pneumatic fluid from a first independent source to control a first associated service brake.

First claim

We claim:

1. A valve, comprising:
at least one of an electrical port adapted to receive an electronic control signal and a pneumatic control port adapted to receive a pneumatic control signal; and
a pneumatic delivery port adapted to transmit a pneumatic fluid, based on at least one of the received electronic control signal and the received pneumatic control signal, from a second independent source to control i) a second associated service brake and ii) delivery of the pneumatic fluid from a first independent source to control a first associated service brake.

2. The valve as set forth in claim 1 , wherein:
a first pressure of the pneumatic fluid controlling the first associated service brake is within a predetermined pressure differential of a second pressure of the pneumatic fluid controlling the second associated service brake.

3. The valve as set forth in claim 2 wherein:
the second pressure of the pneumatic fluid controlling the second associated service brake is within the predetermined pressure differential of the first pressure of the pneumatic fluid controlling the first associated service brake during a steady-state braking period.

4. The valve as set forth in claim 3 wherein:
the second pressure of the pneumatic fluid controlling the second associated service brake is within the predetermined pressure differential of the first pressure of the pneumatic fluid controlling the first associated service brake when the pneumatic delivery port transmits the pneumatic fluid based on both of the received electronic control signal and the received pneumatic control signal.

5. The valve as set forth in claim 3 , wherein:
the first and second pressures cause the first and second associated service brakes, respectively, to be brake balanced with respect to each other during the steady-state braking period.

6. The valve as set forth in claim 1 , wherein:
the first independent source of the pneumatic fluid is associated with a first braking circuit; and
the second independent source of the pneumatic fluid is associated with a second braking circuit.

7. The valve as set forth in claim 6 , wherein:
the first braking circuit is associated with a rear braking circuit of an associated vehicle; and
the second braking circuit is associated with a front braking circuit of the associated vehicle.

8. The valve as set forth in claim 1 , wherein:
the pneumatic control signal is an operator initiated pneumatic control signal.

9. A vehicle braking system, comprising:
a pneumatic brake operator valve delivering a pneumatic control signal;
an electronic control unit delivering an electronic control signal;
a valve, comprising:
at least one of a valve pneumatic control port adapted to receive the pneumatic control signal and an electrical port adapted to receive the electronic control signal; and
a valve pneumatic delivery port adapted to transmit a pneumatic fluid, based on at least one of the received pneumatic control signal and the received electronic control signal, from a second independent source to control i) a second associated service brake and ii) delivery of the pneumatic fluid from a first independent source to control a first associated service brake.

10. The vehicle braking system as set forth in claim 9 , wherein:
the pneumatic brake operator delivers the pneumatic control signal when an operator of an associated vehicle actuates a pedal of the pneumatic brake operator; and
the electronic control unit delivers the electronic control signal when an automatic braking system of the associated vehicle is initiated.

11. The vehicle braking system as set forth in claim 9 , wherein:
a first pressure of the pneumatic fluid controlling the first associated service brake is within a predetermined pressure differential of a second pressure of the pneumatic fluid controlling the second associated service brake.

12. The vehicle braking system as set forth in claim 9 , further including:
a relay valve controlling the delivery of the pneumatic fluid from the first independent source to the first associated service brake, the relay valve including:
a relay pneumatic control port fluidly communicating with the valve pneumatic delivery port;
a relay pneumatic supply port fluidly communicating with the first independent source; and
a relay pneumatic delivery port fluidly communicating with the first associated service brake.

13. The vehicle braking system as set forth in claim 12 , wherein:
the relay pneumatic control port receives the pneumatic fluid from the valve pneumatic delivery port; and
the relay pneumatic delivery port transmits the pneumatic fluid from the first independent source to the first associated service brake based on a pressure level of the pneumatic fluid at the relay pneumatic control port.

14. The vehicle braking system as set forth in claim 9 , wherein:
a first pressure of the pneumatic fluid controlling the first associated service brake is within the predetermined pressure differential of a second pressure of the pneumatic fluid controlling the second associated service brake during a steady-state braking period.

15. The vehicle braking system as set forth in claim 9 , wherein:
if the at least one of the received pneumatic control signal and the received electronic control signal is the received pneumatic control signal, the pressure level of the pneumatic fluid at the valve pneumatic delivery port is based on an actuation level of a brake pedal by an operator of an associated vehicle.

16. The vehicle braking system as set forth in claim 9 , wherein:
the second independent source of the pneumatic fluid is associated with one of a first braking circuit and a second braking circuit of the associated vehicle; and
the second independent source of the pneumatic fluid is associated with the other of the first braking circuit and the second braking circuit of the associated vehicle.

17. A method for controlling a vehicle braking system, the method comprising:
receiving at least one of i) a pneumatic control signal of pneumatic fluid from a second independent source of the pneumatic fluid at a valve pneumatic control port and ii) an electronic control signal at an electrical port; and
controlling a first service brake and a second service brake, based on the at least one of the pneumatic control signal and the electronic control signal, with the pneumatic fluid from the second independent source of the pneumatic fluid, the controlling step including:
applying the second service brake with the pneumatic fluid from the second independent source; and
applying the first service brake with the pneumatic fluid from a first independent source of the pneumatic fluid.

18. The method for controlling a vehicle braking system as set forth in claim 17 , wherein the controlling step includes:
controlling a first pressure of the pneumatic fluid applying the first service brake to be within a predetermined pressure differential of a second pressure of the pneumatic fluid applying the second service brake.

19. The method for controlling a vehicle braking system as set forth in claim 18 , wherein the controlling step includes:
controlling the first pressure of the pneumatic fluid applying the first service brake to be within the predetermined pressure differential of the second pressure of the pneumatic fluid applying the second service brake during a steady-state braking period.

20. The method for controlling a vehicle braking system as set forth in claim 17 , further includi

Assignees

• Bendix Commercial Vehicle Systems Llc

Inventors

• Niglas Paul C
• Tober Michael D
• Howell David W
• Wieder Gerhard
• Mustapha Adnan
• Roether Friedbert

Classifications

• B60T13/66

  Electrical control in fluid-pressure brake systems · CPC title

• B60T8/263

  for pneumatic brake systems · CPC title

• B60T13/662

  characterised by specified functions of the control system components · CPC title

• B60T13/683

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

• B60T8/327

  Pneumatic systems · CPC title