Method for operating brake system for motor vehicles, and brake system

Abstract

The invention relates to a method for operating a brake system for motor vehicles, comprising several wheel brakes (8, 9, 10, 11), an electrically controllable pressure supply device (5, 100), which can dispense a determinable pressure medium volume (V) for actuating the wheel brakes, and an analogized or analog-controlled inlet valve (6a-6d), which is arranged in each wheel brake between the pressure supply device and the wheel brake, for adjusting wheel-individual brake pressures (pn). A check valve (50a-50d) is connected in each case in parallel to the inlet valves, which opens in the direction of the pressure supply device, wherein, at the start of a wheel-individual brake pressure control, all the inlet valves (6a-6d) are closed, and wherein a pressure build-up is carried out in a predetermined group (A1, A2) of one or more wheel brakes (8, 11, 8, 11) by displacing a pressure medium volume (VA) into the predetermined group (A1, A2) of wheel brakes by means of the pressure supply device (5, 100). Each inlet valve of the one or more wheel brakes (8, 11, 8, 11) of the predetermined group (A1, A2) is controlled in such a way that the inlet valve is overflowed, wherein each inlet valve of the remaining wheel brakes (9, 10, 11, 8, 9, 10, 9, 10) is controlled in such a way that the inlet valve remains closed. The invention also relates to a brake system.

Description

technical field [0001] The invention relates to a method for operating a brake system according to the preamble of claim 1 and a brake system according to the preamble of claim 14 . Background technique [0002] In motor vehicle technology, "brake-by-wire" braking systems are becoming more and more popular. Brake systems of this type usually comprise, in addition to the brake master cylinder, which can be operated by the vehicle driver, an electrically controllable pressure supply device, by means of which in the "brake-by-wire" operating mode the wheel brakes or brakes are activated. operation of the master cylinder. In order to convey a pleasant pedal feel to the driver of the vehicle in the "brake-by-wire" operating mode, the brake system usually includes a brake pedal feel simulator. In the braking system, the wheel brakes can also be actuated on the basis of electronic signals without active assistance from the vehicle driver. Such an electronic signal can be output,...

AI Technical Summary

Problems solved by technology

What is regarded as a disadvantage here is the not inconspicuous noise development, which mainly arises from the fact that, on the one hand, the electric motor must carry out the reversing process of the piston-cylinder system at a high frequency, and on the other hand, the combined valve must Closing and opening one after the other, which causes pounding noise inside the compound valve

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