Brake system with brake slip control

DETAILED DESCRIPTION According to the embodiment shown, two hydraulic pressure fluid circuits 2 and 3 are connected to a tandem master cylinder 1 of known design.
As a diagonal brake circuit split-up is chosen in this arrangement, the brake circuit 2 leads directly to the symbolically indicated right front wheel V.
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R and leads also to the left rear wheel H.
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L via a brake force distributor which serves as a pressure reducer 4 when there is a specific axle load distribution.
In the same fashion, the pressure fluid circuit 3 is connected directly to the left front wheel V.
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L and via the pressure reducer 5 to the right rear wheel H.
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R.
Said pressure reducers 4, 5 adapt in a known manner the sharing of the braking pressure between the front and the rear wheel to the static and dynamic axle load distribution which is dependent on the vehicle velocity, the braking pressure and other parameters.
The inventive brake system permits in many cases to obviate the need for pressure reducers in the pressure fluid line leading to the rear wheel because, under the conditions described, changing over will take place such that the rear wheels or the sensed rotational behavior of the rear wheels, respectively, take charge of controlling the brake slip control instead of the front wheels.
In the embodiment of the invention illustrated herein, electromagnetically actuatable valves 6 through 19 serve as pressure fluid modulators, which valves will only be excited in a specific sequence and thereby switched over upon the commencement of the brake slip control.
In the de-energized state, the two inlet valves 6, 7 are opened, while the outlet valves 8, 9 are closed.
Furthermore, the illustration shows the sensors S.
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1 through S.
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4 individually assigned to each wheel, the said sensors possessing each one inductive transducer 10 in which, with the toothed rim 11 rotating, a voltage will be induced dependent on the tooth pitch and the velocity of the wheel.
The output signals of the sensors S.
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