Brake system and vehicle including the brake system

Patent metadata

Field	Value
Publication number	US-9296375-B2
Application number	US-73555109-A
Country	US
Kind code	B2
Filing date	Jan 30, 2009
Priority date	Feb 4, 2008
Publication date	Mar 29, 2016
Grant date	Mar 29, 2016

Abstract

A brake system for a vehicle, in particular for a utility vehicle, having at least one wheel brake device on each of at least one front axle and at least one rear axle, the device including a service brake actuator and a spring-type brake actuator, it being possible to actuate the wheel brake device by a service brake actuation device and a parking brake actuation device. Also described is a vehicle having such a brake system.

First claim

The invention claimed is:

1. A brake system for a vehicle, comprising:
a service brake actuation device;
a parking brake actuation device of a parking brake system; and
at least two wheel brake devices, each including a service brake actuator and a spring-type brake actuator, wherein at least one of the wheel brake devices is actuatable on each of at least two axles by the service brake actuation device and the parking brake actuation device;
wherein the spring-type brake actuator of at least one of the wheel brake devices is releasable by a control pressure applied by control pressure source by way of a control line,
wherein at least one further wheel brake device for immobilizing the vehicle is actuated by at least one of (i) a spring force of the spring-type brake actuator assigned to this device, and (ii) a force of the service brake actuator,
wherein when the parking brake actuation device is engaged, the wheel brake devices on axles of the vehicle are releasable continuously or in stages, so as to prevent strain in the event of an air suspension ride height adjustment by a control unit without neutralizing the parking brake system, and
wherein release of the spring-type brake actuators is initiate-able by a signal from the control unit for the air suspension ride height adjustment, so that in operational service the spring-type brake actuators are available at any time as auxiliary, emergency or additional brakes.

2. The brake system of claim 1 , wherein the control pressure source is an ASR valve.

3. The brake system of claim 2 , wherein the ASR valve can be activated by an electronic control unit (ECU) for releasing the spring-type brake actuators.

4. The brake system of claim 3 , wherein the pressure control module is connected to a control connection of a shuttle valve device, the second connection of which is connected directly or via a relay valve to the spring-type brake actuators to be released and the third connection of which is connected directly or via a relay valve to the parking brake actuation device for actuating the spring-type brake actuators.

5. The brake system of claim 3 , wherein the pressure control module is arranged between the service brake actuation device and at least one ABS valve assigned to the service brake.

6. The brake system of claim 3 , wherein the pressure applied by the pressure control module can be isolated by at least one ABS valve from the spring-type brake actuators to be released.

7. The brake system of claim 2 , wherein the ASR valve is connected to a control connection of a further shuttle valve device, the second connection of which is connected to the service brake actuation device and the third connection of which is connected to an overload protection relay valve for releasing the spring-type brake actuators and directly or indirectly via a relay valve to at least one service brake actuator of at least one of the axles.

8. The brake system of claim 7 , wherein the shuttle valve device is connected to the pressure control module of at least one axle, which is not to be released or which does not have any spring-type brake actuators.

9. The brake system of claim 1 , wherein at least one pressure circuit of the service brake actuation device is the control pressure source.

10. The brake system of claim 9 , wherein at least one of the pressures modulated by the service brake actuation device is restrained by at least one ABS valve of at least one assigned service brake actuator.

11. The brake system of claim 10 , wherein at least one service brake actuator remains connected to the service brake actuation device, and wherein at least one service brake actuator prevents the vehicle from rolling away.

12. The brake system of claim 9 , wherein the actuation of the service brake actuation device acts on at least one service actuator of at least one axle and at the same time serves as a control pressure source of at least one of the axles.

13. The brake system of claim 9 , wherein at least one of the pressures modulated by the service brake actuation device is restrained by at least one ABS valve of all assigned service brake actuators, and wherein the vehicle is prevented from rolling away by at least one spring-type brake actuator.

14. The brake system of claim 1 , wherein at least one spring-type brake actuator of at least one of the axles is releasable by a control pressure independently of the spring-type brake actuator of at least one further axle of the vehicle.

15. The brake system of claim 14 , wherein the vehicle is prevented from rolling away by at least one unreleased spring-type brake actuator.

16. The brake system of claim 1 , wherein a first connection of a shuttle valve device is coupled to the parking brake actuation device, a second connection is connected to the spring-type brake actuators to be released and a third connection is connected to the control pressure source, so that the spring-type brake actuators to be released can be subjected to a higher one of the two pressures from the control pressure source and the parking brake actuation device.

17. The brake system of claim 16 , wherein the shuttle valve device can be brought by the pressure applied indirectly or directly via the ASR valve into a working position in which the spring-type brake actuators of at least one axle to be opened are released.

18. The brake system of claim 1 , further comprising:
an overload protection relay valve, which has a connection connected to the service brake actuation device via a connecting line, a connection connected to the parking brake actuation device and a connection connected to the spring-type brake actuators.

19. The brake system of claim 18 , wherein the control pressure for releasing the spring-type brake actuators of at least one axle is applied indirectly or directly through actuation of the service brake actuation device by the overload protection relay valve.

20. The brake system of claim 1 , wherein the vehicle is prevented from rolling away by at least one service brake actuator.

21. The brake system of claim 1 , wherein a wheel brake device that is not to be released is braked by the service brake actuator.

22. The brake system of claim 1 , wherein the service brake actuation device is a footbrake valve.

23. The brake system of claim 1 , wherein the service brake actuation device includes at least one pressure control module.

24. The brake system of claim 1 , wherein the parking brake actuation device is a handbrake valve.

25. The brake system of claim 1 , wherein a shuttle valve serves as shuttle valve device.

26. The brake system of claim 1 , wherein an overload protection relay valve serves as shuttle valve device.

27. The brake system of claim 1 , wherein the shuttle valve device can be brought by the pressure applied indirectly or directly via the service brake actuation device into a working position in which the spring-type brake actuators of at least one axle to be opened are released.

28. The brake system of claim 1 , wherein the control pressure for releasing at least one spring-type brake actuator ( 12 a , 12 b ; 12 e , 12 f ) of at least one axle ( 2 , 6 ) is applied by a pressure control module ( 74 ) of the electronic brake system (EBS).

29. A vehicle, comprising:
a brake system brake system, including:
a service brake actuation device;
a pa

Assignees

• Balogh Levente
• Herges Michael
• Knorr Bremse Systeme Fuer Nutzfahrzeuge Gmbh

Inventors

• Balogh Levente
• Herges Michael

Classifications

• B60T13/385 Primary

  Control arrangements therefor · CPC title

• B60T17/083

  Combination of service brake actuators with spring loaded brake actuators · CPC title