Brake system for a vehicle, and method for operating a brake system for a vehicle

Patent metadata

Field	Value
Publication number	US-10272889-B2
Application number	US-201715650009-A
Country	US
Kind code	B2
Filing date	Jul 14, 2017
Priority date	Jan 16, 2015
Publication date	Apr 30, 2019
Grant date	Apr 30, 2019

Abstract

A brake system for a vehicle includes a first brake device for braking a first wheel of the vehicle, a second brake device for braking a second wheel of the vehicle, a first brake pedal which is paired with the first wheel, a second brake pedal which is paired with the second wheel, a brake control valve which is designed to act on the first brake device and/or the second brake device, a first control valve for controlling a brake pressure in the first brake device, and a second control valve for controlling a brake pressure in the second brake device. The brake system further has an electromechanical switching module in order to block or at least reduce a braking effect of the second brake device while the first brake pedal is being actuated, and the switching module is designed to block or at least reduce a braking effect of the first brake device while the second brake pedal is being actuated.

First claim

What is claimed is:

1. A brake system for a vehicle, comprising:
a pneumatically and/or hydraulically operated first brake device for braking a first wheel of the vehicle;
a pneumatically and/or hydraulically operated second brake device for braking a second wheel of the vehicle;
a first brake pedal associated with the first wheel;
a second brake pedal associated with the second wheel;
a brake control valve configured to apply a pneumatic and/or hydraulic brake pressure to the first brake device and/or the second brake device when the first brake pedal and/or the second brake pedal is actuated;
a first control valve for controlling the brake pressure in the first brake device;
a second control valve for controlling the brake pressure in the second brake device; and
an electromechanical switch module actuatable by the first brake pedal and/or the second brake pedal and configured to activate the second control valve when the first brake pedal is actuated in order to remove or at least reduce a braking effect of the second brake device, and/or to activate the first control valve when the second brake pedal is actuated in order to remove or at least reduce a braking effect of the first brake device.

2. The brake system as claimed in claim 1 , further comprising at least a first brake circuit and a second brake circuit, wherein
the brake control valve is implemented to apply the brake pressure to the first brake device via the first brake circuit and/or the second brake circuit and to apply the brake pressure to the second brake device via the first brake circuit and/or the second brake circuit, and
the first brake circuit and the second brake circuit are connected in series.

3. The brake system as claimed in claim 1 , further comprising:
at least one pneumatically and/or hydraulically operated further brake device for braking at least one further wheel of the vehicle; and
at least one further control valve for controlling the brake pressure in the further brake device, wherein
the brake control valve is further implemented to apply the brake pressure to the further brake device when the first brake pedal and/or the second brake pedal is actuated, and
the switch module is implemented to further activate the further control valve when the first brake pedal and/or the second brake pedal is actuated in order to remove or at least reduce a braking effect of the further brake device.

4. The brake system as claimed in claims 2 , wherein:
the brake control valve is implemented to apply the brake pressure to the first brake device and/or the second brake device via the first brake circuit and to apply the brake pressure to the further brake device via the second brake circuit.

5. The brake system as claimed in claim 1 , wherein the switch module comprises:
a first control port that is electrically conductively connected to the first control valve,
a second control port that is electrically conductively connected to the second control valve,
a supply port for applying a supply voltage,
a first switch that is mechanically coupled to the first brake pedal, and
a second switch that is mechanically coupled to the second brake pedal, wherein
the first switch is implemented to electrically conductively connect the second control port to the supply port when the first brake pedal is actuated in order to activate the second control valve, and
the second switch is implemented to electrically conductively connect the first control port to the supply port when the second brake pedal is actuated in order to activate the first control valve.

6. The brake system as claimed in claim 3 , wherein the switch module comprises:
a first control port that is electrically conductively connected to the first control valve,
a second control port that is electrically conductively connected to the second control valve,
a supply port for applying a supply voltage,
a first switch that is mechanically coupled to the first brake pedal, and
a second switch that is mechanically coupled to the second brake pedal, wherein
the first switch is implemented to electrically conductively connect the second control port to the supply port when the first brake pedal is actuated in order to activate the second control valve, and
the second switch is implemented to electrically conductively connect the first control port to the supply port when the second brake pedal is actuated in order to activate the first control valve.

7. The brake system as claimed in claim 6 , wherein the switch module further comprises:
at least one further control port that is electrically conductively connected to the further control valve and/or a trailer control valve for controlling the brake pressure in a pneumatically and/or hydraulically operated trailer brake device for braking the trailer of the vehicle, wherein
the first switch is implemented to electrically conductively connect the further control port to the supply port when the first brake pedal is actuated, and
the second switch is implemented to electrically conductively connect the further control port to the supply port when the second brake pedal is actuated in order to activate the further control valve and/or the trailer control valve in order to remove or at least reduce a braking effect of the trailer brake device.

8. The brake system as claimed in claim 7 , further comprising:
at least one trailer switch disposed between the further control port and the trailer control valve for controlling a voltage supply of the trailer control valve.

9. The brake system as claimed in claim 8 , further comprising:
a first diode with a conducting direction from the first control port to the further control port disposed between the first control port and the further control port; and
a second diode with a conducting direction from the second control port to the further control port disposed between the second control port and the further control port.

10. The brake system as claimed in claim 7 , further comprising:
a first diode with a conducting direction from the first control port to the further control port disposed between the first control port and the further control port; and
a second diode with a conducting direction from the second control port to the further control port disposed between the second control port and the further control port.

11. The brake system as claimed in claim 5 , wherein:
the first switch and the second switch are connected in series,
the second switch is implemented to electrically conductively connect the second control port to the first switch with the second brake pedal in a rest position, and
the first switch is implemented to electrically conductively connect the first control port to the second switch with the first brake pedal in a rest position.

12. The brake system as claimed in claim 8 , wherein:
the first switch and the second switch are connected in series,
the second switch is implemented to electrically conductively connect the second control port to the first switch with the second brake pedal in a rest position, and
the first switch is implemented to electrically conductively connect the first control port to the second switch with the first brake pedal in a rest position.

13. The brake system as claimed in claim 1 , further comprising:
a control unit for controlling a voltage supply of the switch module, wherein
the control unit is implemented to interrupt the voltage supply if at least one of: (i) the vehicle exceeds a predetermined speed, (ii) the vehicle exceeds a predetermined tilt angle, (iii) a differential lock of the vehicle is activated, and (iv) a trail

Assignees

• Knorr Bremse Systeme Fuer Nutzfahrzeuge Gmbh

Inventors

• Finkl Florian
• Buch Andreas
• Herges Michael

Classifications

• B60T15/025

  Electrically controlled valves · CPC title

• B60T8/17 Primary

  Using electrical or electronic regulation means to control braking {(detecting or indicating faulty operation B60T8/885)} · CPC title

• B60T11/21 Primary

  with two pedals operating on respective circuits, pressures therein being equalised when both pedals are operated together, e.g. for steering (steering non-deflectable wheels or endless tracks by differentially driving ground-engaging elements on opposite vehicle sides using brakes as main steering effecting means B62D11/08) · CPC title

• B60T8/326

  Hydraulic systems · CPC title

• B60T8/327

  Pneumatic systems · CPC title