A brake system for motor vehicles comprising a brake master cylinder which can be activated by means of a brake pedal and to which wheel brakes are connected. The brake system also comprises an electrically controllable pressure-generating device, a pressure-regulating valve arrangement to regulate
A brake system for motor vehicles comprising a brake master cylinder which can be activated by means of a brake pedal and to which wheel brakes are connected. The brake system also comprises an electrically controllable pressure-generating device, a pressure-regulating valve arrangement to regulate a wheel brake pressure set at a wheel brake, a first electronic control and regulating unit which controls at least one of the pressure-generating device, the pressure-regulating valve arrangement, and an electrically controllable auxiliary pressure-generating device by means of which the brake master cylinder can be activated by means of which a pressure in an intermediate chamber of the brake master cylinder can be controlled or regulated.
대표청구항▼
1. A brake system for motor vehicles comprising a brake master cylinder which can be activated by means of a brake pedal and to which wheel brakes are connected, an electrically controllable first pressure-generating device, a pressure-regulating valve arrangement to regulate a wheel brake pressure
1. A brake system for motor vehicles comprising a brake master cylinder which can be activated by means of a brake pedal and to which wheel brakes are connected, an electrically controllable first pressure-generating device, a pressure-regulating valve arrangement to regulate a wheel brake pressure set at the wheel brakes, a first electronic control and regulating unit which controls at least one of the first pressure-generating device and the pressure-regulating valve arrangement, an electrically controllable second pressure-generating device activating the brake master cylinder by means of which a servo pressure supplied to an intermediate chamber of the brake master cylinder is controlled or regulated; wherein in a normal brake by wire operating mode, a brake system pressure for activating the wheel brakes is generated by the first pressure-generating device and the brake master cylinder is isolated from the wheel brakes. 2. The brake system as claimed in claim 1, further comprising in that the second pressure-generating device is an independent module of the brake system. 3. The brake system as claimed in claim 1 further comprising an electric motor, a pump, a pressure sensor, a brake pedal travel or a brake pedal angle sensor, and an electrical energy accumulator, each associated with the second pressure generating device. 4. The brake system as claimed in claim 3, further comprising a second electronic control and regulating unit connected via a communication connection with the first electronic control and regulating unit. 5. The brake system as claimed in claim 1 wherein the second pressure-generating device activates the brake master cylinder to set the servo pressure at a nominal pressure supplied to the intermediate chamber and the brake master cylinder supplies brake pressure to the wheel brakes when the first electronic control and regulating unit or the first pressure-generating device is partly or fully inactive or non-functioning. 6. The brake system as claimed in claim 1 wherein the first electronic control and regulating unit is connected with a first sensor which determines a brake pedal travel or a brake pedal angle, and the second brake pressure-generating device is connected with a second sensor, which determines the brake pedal travel or the brake pedal angle. 7. The brake system according claim 6, wherein, using signals from the second sensor, a second electronic control and regulating unit determines the servo pressure of the brake master cylinder. 8. The brake system as claimed in claim 1 wherein the first pressure-generating device is formed by a cylinder-piston arrangement having a piston activated by an electromechanical actuator. 9. The brake system as claimed in claim 1 wherein, connected to the brake master cylinder is a hydraulically activated simulation device with at least one elastic element which, in a normal brake by wire operating mode, gives the vehicle driver pedal feel, and in the normal operating mode the brake master cylinder is isolated from supplying brake pressure to the wheel brakes. 10. The brake system as claimed in claim 1 wherein the second pressure-generating device comprises a second electronic control and regulating unit. 11. A brake system for motor vehicles comprising a brake master cylinder which can be activated by means of a brake pedal and to which wheel brakes are connected, an electrically controllable first pressure-generating device, a pressure-regulating valve arrangement to regulate a wheel brake pressure set at the wheel brakes, a first electronic control and regulating unit which controls at least one of the first pressure-generating device and the pressure-regulating valve arrangement, an electrically controllable second pressure-generating device activating the brake master cylinder by means of which a servo pressure supplied to an intermediate chamber of the brake master cylinder is controlled or regulated, and a second electronic control and regulating unit which controls the second pressure-generating device independent of the first pressure-generating device; wherein in a normal brake by wire operating mode, a brake system pressure for activating the wheel brakes is generated by the first pressure-generating device and the brake master cylinder is isolated from the wheel brakes. 12. The brake system as claimed in claim 11, wherein the system further comprises a brake pedal travel or brake pedal angle sensor connected to the second pressure generating device, the sensor determining the brake pedal travel or brake pedal angle or a value corresponding thereto. 13. The brake system as claimed in claim 12, wherein the sensor is separate from a further sensor that is connected with the first electronic control and regulating unit, wherein the further sensor determines brake pedal travel or brake pedal angle or a value corresponding thereto. 14. The brake system as claimed in claim 11, further comprising a pressure sensor for determining the pressure of the second pressure generating device.
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이 특허에 인용된 특허 (8)
Kajita, Hidenobu; Kojima, Seiichi, Brake apparatus for a vehicle.
Isono,Hiroshi, Braking system having valve device for delivering pressurized fluid to brake cylinder selectively from at least two pressurizing chambers or only one of them.
Ocvirk Norbert (Offenbach DEX) Weise Lutz (Mainz DEX) Becker Horst-Peter (Frankfurt Am Main DEX) Determann Otto (Darmstadt DEX), Valve arrangement for brake systems of automotive vehicles comprising an electronic antilocking and traction slip contro.
Hiroshi Isono JP; Yasuji Mizutani JP, Vehicle braking system having devices for controlling fluid flows between pressurizing and assisting chambers of master cylinder and pressure source and reservoir.
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