Control Device for a Brake System of a Utility Vehicle and Method for Controlling a Brake System

• US 20100252378A1
• Filed: 02/03/2010
• Published: 10/07/2010
• Est. Priority Date: 08/08/2007
• Status: Abandoned Application

• Current Assignee: Knorr-Bremse Systeme Fur Nutzfahrzeuge GMBH (Estate of Heinz Hermann Thiele)
• Original Assignee: Knorr-Bremse Systeme Fur Nutzfahrzeuge GMBH (Estate of Heinz Hermann Thiele)
• Inventors: HILBERER, Eduard
• Application Number:
  US12/699,640
• Publication Number:
  US 20100252378A1
• Time in Patent Office: Days
• US Class Current: 188/106.F
• CPC Class Codes: B60T 13/683 in pneumatic systems or parts thereof in vacuum systems B60T13/72
• CPC Class Codes: B60T 13/686 in hydraulic systems or parts thereof
• CPC Class Codes: B60T 17/221 Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems hydraulic pressure systems in general F15B19/00, F15B21/04; testing structures or apparatus G01M
• CPC Class Codes: B60T 7/107 with electrical power assistance
• CPC Class Codes: B60T 8/1708 for lorries or tractor-trailer combinations

Abstract

A control device and a method for a brake system of a utility vehicle are provided. The brake system includes service brake cylinders and spring brake cylinders for braking the utility vehicle, an electronic control device, sensors for detecting the state of motion of the utility vehicle, a foot brake valve for actuating the service brake, a manual control unit, a module encompassing electrically controllable valves for an anti-blocking system, and a module encompassing electrically controllable valves for an electrically controlled parking brake. The electronic control device influences both the anti-lock system and the electrically controlled parking brake.

Claims

1. A brake system for a utility vehicle, comprising:

service brake cylinders and spring brake cylinders operatively configured for braking the utility vehicle;

an electronic control device;

sensors for sensing a state of movement of the utility vehicle;

a foot brake valve for activating a service brake of the utility vehicle;

a manual control unit operatively configured to transmit to the electronic control device driver requests which are dependent on a method of activating the manual control unit;

a first module having electrically actuable valves for an anti-lock brake system;

a second module having electrically actuable valves for an electrically controlled parking brake; and

wherein the electronic control device is operatively configured to influence control of both the anti-lock brake system and the electrically controlled parking brake.

2. The system as claimed in claim 1, wherein the first module having electrically actuable valves for the anti-lock brake system and the second module having electrically actuable valves for the electrically controlled parking brake at least partially use common air pressure inlets and air pressure outlets.

3. The system as claimed in claim 2, wherein the first module having electrically actuable valves for the anti-lock brake system at least partially prevents the spring brake cylinders from being ventilated by the service brake if the parking brake is ventilated, wherein maximum pressure loading of the cylinder is taken into account.

4. The system as claimed in claim 2, wherein the first module having electrically actuable valves for the anti-lock brake system at least partially prevents the spring brake cylinders from being ventilated by the parking brake if the service brake is already activated, wherein maximum pressure loading of the cylinder is taken into account.

5. The system as claimed in claim 3, wherein the parking brake is also ventilatable when the service brake is being ventilated, wherein maximum pressure loading of the cylinder is taken into account.

6. The system as claimed in claim 3, wherein the parking brake is ventable when the service brake is simultaneously activated, wherein maximum pressure loading of the cylinder is taken into account.

7. The system as claimed in claim 1, wherein the electronic control device actuates the first module having electrically actuable valves for the electrically controlled parking brake such that when the spring brake cylinder of the utility vehicle is ventilated, the control line to a trailer is vented in order to test whether the utility vehicle can hold the entire train.

8. The system as claimed in claim 1, wherein a trailer brake is releasable by the manual control unit.

9. The system as claimed in claim 1, wherein the electronic control device can go into a standby state when a wakeup signal is received.

10. The system as claimed in claim 1, wherein the ABS system and the electrically controlled parking brake operate only when an ignition of the utility vehicle is switched on.

11. The system as claimed in claim 1, wherein the ABS system and the electrically controlled parking brake begin to operate after the ignition is switched on, and after the ignition is switched off, an oscillator-controlled run-on time occurs until the electronic control device is at least partially deactivated.

12. The system as claimed in claim 1, wherein a pressure sensor is configured to measure a pressure in parking brake cylinders connected to a connection, said pressure sensor being pneumatically connected to a parking brake relay outlet.

13. The system as claimed in claim 1, wherein a pressure sensor is connected by an electric line to the electronic control device and measures a pressure in parking brake cylinders which are connected to a connection, wherein said pressure sensor is arranged downstream of a shuttle valve.

14. The system as claimed in claim 1, wherein the first module having electrically actuable valves for the anti-lock brake system and the second module having electrically actuable valves for the electrically controlled parking brake are arranged on a housing which accommodates said electronic control device.

15. The system as claimed in claim 1, wherein a function of the anti-lock brake system and a function of the electric parking brake are deactivatable separately from one another.

16. The system as claimed in claim 1, wherein a pneumatic control connection, which is coupleable to a control inlet of a trailer control module, is provided on the second module for the electrically controlled parking brake;

and

further wherein the electronic control device makes available via the pneumatic control connection an anti-jackknifing braking function for a trailer if such anti-jackknifing braking is requested.

17. The system as claimed in claim 1, wherein a redundant voltage supply is provided for the electronic control device.

18. The system as claimed in claim 1, wherein the electronic control device has a connection to a serial bus system.

19. The system as claimed in claim 18, wherein vehicle acceleration measured values are transmitted to the electronic control device via the connection to the serial bus system.

20. The system as claimed in claim 1, wherein the sensors of the brake system for sensing the state of movement of the utility vehicle comprise yaw sensors;

and

further wherein that the service brake cylinders have a pressure subjected to closed-loop control as a function of the utility vehicle acceleration about its transverse axis and longitudinal axis.

21. The system as claimed in claim 20, wherein the service brake cylinder pressure is subjected to closed-loop control as a function of at least one of the following variables:

parking brake cylinder pressure,

parking brake value signal generator pressure,

fault state of the system,

status of the foot brake value signal generator, and

speed of utility vehicle and wheel size.

22. The system as claimed in claim 1, wherein the parking brake cylinder pressure is subjected to closed-loop control as a function of a handbrake value signal generator.

23. The system as claimed in claim 1, wherein the brake system makes available a traction control system function, wherein the electronic control device performs the closed-loop control of the traction control system.

24. A method for controlling a brake system for a utility vehicle coupleable to a trailer, the brake system comprising service brake cylinders and spring brake cylinders for braking the utility vehicle, an electronic control device, sensors for sensing a state of movement, a foot brake valve for activating the service brake, a manual control unit by which driver requests are transmitted to the electronic control device, and a first module having electrically actuable valves for an anti-lock brake system and a second module having electrically actuable valves for an electrically controlled parking brake having a trailer control valve for connecting the trailer, the method comprising the acts of:

monitoring the utility vehicle and trailer to determine if an anti-jackknifing braking is requested; and

initiating, by way of the electronic control device, controlled anti-jackknifing braking using the second module for the electrically controlled parking brake.

25. The method according to claim 24, wherein the act of using the second module for the electrically controlled parking brake uses a control connection present on the second module.