Brake system for motor vehicles

Patent metadata

Field	Value
Publication number	US-10137877-B2
Application number	US-201414770859-A
Country	US
Kind code	B2
Filing date	Feb 17, 2014
Priority date	Feb 27, 2013
Publication date	Nov 27, 2018
Grant date	Nov 27, 2018

Abstract

A brake system for motor vehicles, having a brake master cylinder actuated by a brake pedal with at least one first pressure chamber. The brake master cylinder communicating with wheel brakes; and a hydraulic fluid storage container. A pressure balancing connection connects to the fluid storage container. A first electrically controllable pressure supply device communicating with the wheel brakes. A pressure regulating valve arrangement for regulated wheel brake pressure. A first electronic control and regulating unit actuated the first pressure supply device and the pressure regulating valve arrangement. A second electrically controllable pressure supply device connected to the brake master cylinder and having a pressure outlet connection paired with a second electronic control and regulating unit. The first and the second pressure supply device generate braking pressures independently of each other, and the pressure outlet connection is connected to the pressure balancing connection.

First claim

The invention claimed is:

1. A brake system for motor vehicles, the brake system comprising:
a brake master cylinder which can be actuated by a brake pedal and which comprises at least one first pressure chamber, wherein the brake master cylinder is separably hydraulically connected to a plurality of wheel brakes,
a pressure medium storage container assigned to the brake master cylinder, wherein the first pressure chamber of the brake master cylinder has a pressure balancing port for connecting to the pressure medium storage container and a first pressure chamber output port hydraulically connected to at least one of the wheel brakes, wherein the first pressure chamber output port is separate from the pressure balancing port,
a first electrically controllable pressurization device which can be connected to the wheel brakes,
a pressure regulating valve arrangement for regulating and controlling a wheel brake pressure that is set at the wheel brakes,
a first electronic control and regulating unit for controlling the first pressurization device and the pressure regulating valve arrangement,
a second electrically controllable pressurization device connected to the brake master cylinder and having a pressure output port and the second electrically controllable pressurization device is assigned to a second electronic control and regulating unit,
wherein the first and the second pressurization devices can build up brake pressures independently of each other,
wherein the pressure output port of the second pressurization device is connected to the pressure balancing port, wherein the second pressurization device builds up pressure in the at least one first pressure chamber via the pressure output port of the second pressurization device and the pressure balancing port,
wherein the at least one first pressure chamber is separably hydraulically connected to at least one of the wheel brakes via the first pressure chamber output port.

2. The brake system as claimed in claim 1 further comprising in that a second valve arrangement is provided for blocking the connection between the pressure balancing port and the pressure medium storage container.

3. The brake system as claimed in claim 2 further comprising in that the second valve arrangement can be controlled by means of the second electronic control and regulating unit.

4. The brake system as claimed in claim 2 further comprising in that the pressure built up by the second pressurization device can be reduced via the second valve arrangement.

5. The brake system as claimed in claim 2 further comprising in that the second valve arrangement is configured as an analog controllable valve.

6. The brake system as claimed in claim 2 further comprising in that the second valve arrangement is arranged in an autonomous assembly with the second pressurization device.

7. The brake system as claimed in claim 1 wherein the brake master cylinder has a second pressure chamber to which a pressure sensor is connected, and an output signal of the pressure sensor is supplied to the second electronic control and regulating unit and the pressure sensor is supplied with electrical energy by the second electronic control and regulating unit.

8. The brake system as claimed in claim 7 , further comprising in that the second pressurization device is configured as a hydraulic module in which the pressure sensor is integrated.

9. The brake system as claimed in claim 8 , further comprising in that the brake master cylinder, the first pressurization device and the pressure regulating valve arrangement are combined in one assembly in which the hydraulic module comprising the second pressurization device is integrated.

10. The brake system as claimed in claim 9 , further comprising in that the first and the second electronic control and regulating units are mechanically connected to the assembly.

11. The brake system as claimed in claim 1 wherein the second pressurization device includes the second electronic control and regulating unit.

12. The brake system as claimed in claim 1 wherein a third electronic control and regulating unit is provided which controls a task division between the first and the second electronic control and regulating units.

13. The brake system as claimed in claim 1 , wherein the pressure output port of the second pressurization device is directly connected to the pressure balancing port.

14. The brake system as claimed in claim 1 , further comprising a piston, the piston delimitating the first pressure chamber, wherein the first pressure chamber is hydraulically separated from the pressure balancing port when the piston is moved from a first position to a second position.

Assignees

• Continental Teves Ag & Co Ohg

Inventors

• Feigel Hans-Jörg
• Biller Harald

Classifications

• B60T8/4081 Primary

  Systems with stroke simulating devices for driver input (B60T8/4077 takes precedence) · CPC title

• B60T13/686

  in hydraulic systems or parts thereof · CPC title

• B60T13/147 Primary

  In combination with distributor valve · CPC title