METHOD FOR CONTROLLING A BRAKE ACTUATION OF A HYBRID VEHICLE SIMULATOR

• US 20110254358A1
• Filed: 11/11/2009
• Published: 10/20/2011
• Est. Priority Date: 12/18/2008
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Strengert, Stefan, Weiberle, Reinhard, Jahnz, Timo
• Granted Patent: US 9,403,516 B2
• Time in Patent Office: Days
• US Class Current: 303/3
• CPC Class Codes: B60T 1/10 by utilising wheel movement for accumulating energy, e.g. driving air compressors
• CPC Class Codes: B60T 13/586 the retarders being of the electric type
• CPC Class Codes: B60T 13/745 acting on a hydraulic system, e.g. a master cylinder
• CPC Class Codes: B60T 7/042 by electrical means, e.g. using travel or force sensors
• CPC Class Codes: B60T 8/447 Reducing the boost of the power-assist booster means to reduce brake pressure
• CPC Class Codes: B60T 8/4872 pump-back systems

Abstract

The invention relates to a method for controlling the activation of a brake of a hydraulic vehicle brake system of a hybrid vehicle which can be braked by the generator mode of an electric drive motor. The invention proposes equipping the vehicle brake system with an electromechanical brake booster and generating a pedal force at a brake pedal with the brake booster when braking by the generator mode of the electric drive motor occurs.

Claims

1-11. -11. (canceled)

12. A method for controlling a brake actuation of a hybrid vehicle brake system of a motor vehicle that has an electrical machine which can be operated as a generator for braking the motor vehicle, and the vehicle brake system has a master cylinder, which is actuatable by muscle power via a muscle-power actuation element and to which a wheel brake is connected, and also has a controllable brake booster, the method including the step of:

upon braking of the motor vehicle with the electrical machine as a generator, exerting a pedal force on the muscle-power actuation element via the brake booster, the pedal force being oriented counter to a muscle power exerted by a vehicle driver on the muscle-power actuation element.

13. The method as defined by claim 12, wherein the electrical machine is an electric drive motor.

14. The method as defined by claim 12, wherein upon braking of the motor vehicle with the electrical machine as a generator, the brake booster effects a force/travel dependency at the muscle-power actuation element that corresponds to the force/travel dependency upon braking solely with the hybrid vehicle brake system

15. The method as defined by claim 12, wherein the vehicle brake system has an idle travel between the muscle-power actuation element and a piston of the master cylinder.

16. The method as defined by claim 13, wherein the vehicle brake system has an idle travel between the muscle-power actuation element and a piston of the master cylinder.

17. The method as defined by claim 14, wherein the vehicle brake system has an idle travel between the muscle-power actuation element and a piston of the master cylinder.

18. The method as defined by claim 15, wherein shortly before the idle travel is overcome, a hydraulic pressure is built up in the master cylinder.

19. The method as defined by claim 16, wherein shortly before the idle travel is overcome, a hydraulic pressure is built up in the master cylinder.

20. The method as defined by claim 17, wherein shortly before the idle travel is overcome, a hydraulic pressure is built up in the master cylinder.

21. The method as defined by claim 15, wherein the idle travel is capable of being switched off.

22. The method as defined by claim 16, wherein the idle travel is capable of being switched off

23. The method as defined by claim 17, wherein the idle travel is capable of being switched off.

24. The method as defined by claim 12, wherein the vehicle brake system has an electromechanical brake booster.

25. The method as defined by claim 17, wherein the vehicle brake system has an electromechanical brake booster.

26. The method as defined by claim 12, wherein the hybrid vehicle brake system is actuated with external force, if a braking action of the electrical machine in the generator mode is too weak to achieve a specified braking action.

27. The method as defined by claim 17, wherein the hybrid vehicle brake system is actuated with external force, if a braking action of the electrical machine in the generator mode is too weak to achieve a specified braking action.

28. The method as defined by claim 12, wherein the hybrid vehicle brake system is actuated with external force if a generator mode of the electrical machine is unwanted.

29. The method as defined by claim 17, wherein the hybrid vehicle brake system is actuated with external force if a generator mode of the electrical machine is unwanted.

30. The method as defined by claim 12, wherein the master cylinder is actuated by muscle power and optionally additionally by a booster force of the brake booster, if a braking action of the electrical machine in the generator mode is too weak to achieve a specified braking action.

31. The method as defined by claim 12, wherein the vehicle brake system has a brake fluid container and a disconnection valve disposed between the brake fluid container and the master cylinder.