Granted Patent B2

US 12,606,141 · App. 17/832,286 · Granted Apr 21, 2026

Inventors: Thomas Dieckmann (Pattensen, DE); Ralph-Carsten Lülfing (Garbsen, DE); Julian van Thiel (Grossburgwedel, DE); Oliver Wulf (Neustadt, DE)

Assignee: ZF CV Systems Global GmbH

B60T13/683B60T13/385B60T13/662B60T2270/402

Abstract

Claims (73)

1 . A parking brake valve assembly for an electronically controllable pneumatic braking system of a vehicle, the parking brake valve assembly having first and second modules performing respective functions different from each other, the parking brake valve assembly comprising:

a first compressed air path receiving a first or second supply pressure (pV, pV 1 , pV 2 ) and having a first monostable valve unit for providing a first parking brake pressure (pF 1 );

a second compressed air path receiving said first or second supply pressure (pV, pV 1 , pV 2 ) and having a second monostable valve unit for providing a second parking brake pressure (pF 2 );

a first shuttle valve having: a first shuttle valve port with said first compressed air path and receiving said first parking brake pressure (pF 1 ); a second shuttle valve port with said second compressed air path and receiving said second parking brake pressure (pF 2 ); and, a third shuttle valve port connectable to a spring brake cylinder;

said first shuttle valve being configured to respectively output the higher of said first parking brake pressure (pF 1 ) and of said second parking brake pressure (pF 2 ) to said third shuttle valve port;

a first electronic control unit (ECU 1 );

a second electronic control unit (ECU 2 );

said first monostable valve unit being switchable by said first electronic control unit (ECU 1 ) and said second monostable valve unit being switchable by said second electronic control unit (ECU 2 );

said first electronic control unit (ECU 1 ) and said second electronic control unit (ECU 2 ) being assigned independently of each other to corresponding ones of said first and second modules as respective control units thereof;

a first voltage source;

a second voltage source;

said first monostable valve unit being supplied by said first voltage source;

said second monostable valve unit being supplied by said second voltage source; and,

said first and second voltage sources being independent of each other so as to ensure that, as long as one of said first electronic control unit (ECU 1 ) and said second electronic control unit (ECU 2 ), or one of said first and second voltage sources functions correctly, at least one of the first parking brake pressure (pF 1 ) and the second parking brake pressure (pF 2 ) is output such that, when one of said first electronic control unit (ECU 1 ) and said second electronic control unit (ECU 2 ) is functional, the parking brake pressure (pF 1 , pF 2 ) is output at the third shuttle valve port.

2 . The parking brake valve assembly of claim 1 , wherein said first compressed air path for ventilating the first shuttle valve port and said second compressed air path for ventilating said second shuttle valve port are respectively connected to a single, ventilating valve.

3 . The parking brake valve assembly of claim 1 , further comprising:

a trailer valve unit for providing a trailer pressure (pA),

wherein the trailer valve unit is connected to said first compressed air path and to said second compressed air path.

4 . The parking brake valve assembly of claim 3 , wherein the trailer valve unit is connected to said first compressed air path and to said second compressed air path.

5 . The parking brake valve assembly of claim 4 , wherein said trailer valve unit receives a first trailer preliminary pressure (pAV 1 ) from the first compressed air path and a second trailer preliminary pressure (pAV 2 ) from the second compressed air path, and outputs the respectively higher first or second trailer preliminary pressure (pAV 1 , pAV 2 ) as the trailer pressure (pA).

6 . The parking brake valve assembly of claim 3 , wherein said trailer valve unit has a first monostable trailer switching valve connected to said first compressed air path, and a second monostable trailer switching valve connected to said second compressed air path.

7 . The parking brake valve assembly of claim 6 , wherein:

said first monostable trailer switching valve has a first trailer switching valve port connected to said second switching valve port, a second trailer switching valve port connected to a second shuttle valve, and a third trailer switching valve port connected to a vent or the vent; and,

the second monostable trailer switching valve has a fourth trailer switching valve port connected to an eighth switching valve port, a fifth trailer switching valve port connected to said second shuttle valve, and a sixth trailer switching valve port connected to a vent or said vent.

8 . The parking brake valve assembly of claim 6 ,

wherein said first monostable trailer switching valve is configured as a first 3/2-way trailer switching valve, and said second monostable trailer switching valve is configured as a second 3/2-way trailer switching valve.

9 . The parking brake valve assembly of claim 8 , wherein:

said first monostable trailer switching valve has: a first trailer switching valve port connected to a second switching valve port; a second trailer switching valve port connected to a second shuttle valve; and, a third trailer switching valve port connected to a vent or said vent; and,

the second monostable trailer switching valve has: a fourth trailer switching valve port connected to an eighth switching valve port; a fifth trailer switching valve port connected to said second shuttle valve; and, a sixth trailer switching valve port connected to a vent or said vent.

10 . A parking brake valve assembly for an electronically controllable pneumatic braking system of a vehicle, the parking brake valve assembly comprising:

a first compressed air path receiving a first or second supply pressure (pV, pV 1 , pV 2 ) and having a first monostable valve unit for providing a first parking brake pressure (pF 1 );

a second compressed air path receiving said first or second supply pressure (pV, pV 1 , pV 2 ) and having a second monostable valve unit for providing a second parking brake pressure (pF 2 );

a first shuttle valve having: a first shuttle valve port with said first compressed air path and receiving said first parking brake pressure (pF 1 ); a second shuttle valve port with said second compressed air path and receiving said second parking brake pressure (pF 2 ); and, a third shuttle valve port connectable to a spring brake cylinder;

said first shuttle valve being configured to respectively output the higher of said first parking brake pressure (pF 1 ) and of said second parking brake pressure (pF 2 ) to said third shuttle valve port;

said first monostable valve unit having a first switching valve and a second switching valve mutually connected in a pressure conducting manner so as to cause said first parking brake pressure (pF 1 ) to be output only when said first and second switching valves are energized; and,

wherein said second monostable valve unit has a third switching valve and a fourth switching valve mutually connected in a pressure-conducting manner so as to cause said second parking brake pressure (pF 2 ) to be output only when said third and fourth switching valves are energized.

11 . The parking brake valve assembly of claim 10 , wherein:

said first switching valve is configured as a first 3/2-way valve, said second switching valve is configured as a second 3/2-way valve, said third switching valve is configured as a third 3/2-way valve; and, said fourth switching valve is configured as a fourth 3/2-way valve; and,

said first and said second 3/2-way valves are pneumatically connected in series, and said third and said fourth 3/2-way valves are pneumatically connected in series.

12 . The parking brake valve assembly of claim 10 , wherein:

said first switching valve has: a first switching valve port receiving the supply pressure (pV, pV 1 , pV 2 ), a second switching valve port connected to said second switching valve; and, a third switching valve port connected to a vent;

wherein, in a first energized switching position, said first switching valve port is connected to said second switching valve port, and, in a deenergized second switching position, said second switching valve port is connected to said third switching valve port;

said second switching valve has: a fourth switching valve port connected to said second switching valve port of said first switching valve; a fifth switching valve port connected to said first shuttle valve port; and, a sixth switching valve port connected to a vent or said vent;

wherein, in a first energized switching position, said fourth switching valve port is connected to said fifth switching valve port, and, in a deenergized second switching position, said fifth switching valve port is connected to said sixth switching valve port;

said third switching valve has: a seventh switching valve port receiving said supply pressure (pV, pV 1 , pV 2 ); an eighth switching valve port connected to said fourth switching valve; and, a ninth switching valve port connected to a vent or said vent;

wherein, in a first energized switching position, said seventh switching valve port is connected to said eighth switching valve port, and, in a deenergized second switching position, said eighth switching valve port is connected to said ninth switching valve port;

said fourth switching valve has: a tenth switching valve port connected to said eighth switching valve port of the third switching valve; an eleventh switching valve port connected to said second shuttle valve port; and, a twelfth switching valve port connected to a vent or said vent; and,

wherein, in a first energized switching position, said tenth switching valve port is connected to said eleventh switching valve port, and, in a deenergized second switching position, said eleventh switching valve port is connected to said twelfth switching valve port.

13 . The parking brake valve assembly of claim 12 , wherein:

a first monostable trailer switching valve has: a first trailer switching valve port connected to said second switching valve port; a second trailer switching valve port connected to a second shuttle valve; and, a third trailer switching valve port connected to a vent or said vent; and,

a second monostable trailer switching valve has: a fourth trailer switching valve port connected to said eighth switching valve port; a fifth trailer switching valve port connected to said second shuttle valve; and, a sixth trailer switching valve port connected to a vent or said vent.

14 . A parking brake valve assembly for an electronically controllable pneumatic braking system of a vehicle, the parking brake valve assembly comprising:

a first compressed air path receiving a first or second supply pressure (pV, pV 1 , pV 2 ) and having a first monostable valve unit for providing a first parking brake pressure (pF 1 );

a second compressed air path receiving said first or second supply pressure (pV, pV 1 , pV 2 ) and having a second monostable valve unit for providing a second parking brake pressure (pF 2 );

a first shuttle valve having: a first shuttle valve port with said first compressed air path and receiving said first parking brake pressure (pF 1 ); a second shuttle valve port with said second compressed air path and receiving said second parking brake pressure (pF 2 ); and, a third shuttle valve port connectable to a spring brake cylinder; said first shuttle valve being configured to respectively output the higher of said first parking brake pressure (pF 1 ) and of said second parking brake pressure (pF 2 ) to said third shuttle valve port;

said first compressed air path for ventilating the first shuttle valve port and said second compressed air path for ventilating said second shuttle valve port being respectively connected to a single, ventilating valve; and,

said ventilating valve having a pressure limiter and a throttle which is arranged parallel to said pressure limiter and permits overflowing of said pressure limiter.

15 . An electronically controllable pneumatic braking system for a vehicle including utility vehicle, the electronically controllable pneumatic braking system having first and second modules for performing respective functions different from each other, the pneumatic braking system comprising:

a first electronic control unit (ECU 1 ) and a second electronic unit (ECU 2 ), wherein said first and second electronic control units (ECU 1 , ECU 2 ) are configured in such a manner that they can at least partially replace one another in the event of a fault;

a parking brake valve assembly including:

a first compressed air path receiving a first or second supply pressure (pV, pV 1 , pV 2 ) and having a first monostable valve unit for providing a first parking brake pressure (pF 1 );

a second compressed air path receiving said first or second supply pressure (pV, pV 1 , pV 2 ) and having a second monostable valve unit for providing a second parking brake pressure (pF 2 );

a first shuttle valve having: a first shuttle valve port with said first compressed air path and receiving said first parking brake pressure (pF 1 ); a second shuttle valve port with said second compressed air path and receiving said second parking brake pressure (pF 2 ); and, a third shuttle valve port connectable to a spring brake cylinder;

said first shuttle valve being configured to respectively output the higher of said first parking brake pressure (pF 1 ) and of said second parking brake pressure (pF 2 ) to said third shuttle valve port;

wherein said first electronic control unit (ECU 1 ) is connected to said first monostable valve unit for providing first switching signals (S 1 ) thereto;

said second electronic control unit (ECU 2 ) is connected to said second monostable valve unit for providing second switching signals (S 2 ) to the second monostable valve unit;

said first electronic control unit (ECU 1 ) and said second electronic control unit (ECU 2 ) being assigned independently of each other to corresponding ones of said first and second modules as respective control units thereof;

a first voltage source;

a second voltage source;

said first monostable valve unit being supplied by said first voltage source;

said second monostable valve unit being supplied by said second voltage source; and,

said first and second voltage sources being independent of each other so as to ensure that, as long as one of said first electronic control unit (ECU 1 ) and said second electronic control unit (ECU 2 ), or one of said first and second voltage sources functions correctly, at least one of the first parking brake pressure (pF 1 ) and the second parking brake pressure (pF 2 ) is output such that, when one of said first electronic control unit (ECU 1 ) and said second electronic control unit (ECU 2 ) is functional, the parking brake pressure (pF 1 , pF 2 ) is output at the third shuttle valve port.

16 . A vehicle comprising the electronically controllable pneumatic braking system claimed in claim 15 .

Assignments (2)

Priority Claims (1)

Continuity (2)

References Cited (77)