Installation for the control of valves in brake lines of a motor vehicle

Claim 2

An installation for the control of valves which are connected in the brake lines of a motor vehicle, and which includes generator means driven by the respective wheels and producing output signals corresponding to the rotational speed of the wheels, amplifier means for each wheel, and rectifier means connected between the generator means and the amplifier means associated with a corresponding wheel, characterized in that each generator means is connected with one input of a differential amplifier means by way of a rectifier means, each generator means being operatively connected with a voltage indicative of a speed of the vehicle by way of another rectifier means, a voltage divider having a tap connected with the other input of the differential amplifier means, one side of the voltage divider being connected with said voltage and the other side thereof with a reference potential, and switch means for said valves controlled by the differential amplifier means and connected between said tap and the reference potential.

Claim 3

An installation according to claim 1, wherein said voltage is the voltage applied to a maximum voltage line from the generator means rotating the fastest.

Claim 4

An installation according to claim 2, wherein said generator means operate by appropriately shaped portions present in at least one of the two parts consisting of wheel and brake.

Claim 5

An installation according to claim 3, wherein said generator means are frequency generators having a frequency-voltage converter means connected in the output thereof.

Claim 6

An installation according to claim 4, characterized in that each generator means is operatively connected with a slip-change measuring means, all slip-change measuring means being connected with an AND circuit means, and the output of the AND circuit means being operatively connected with magnetic valves.

Claim 7

An installation according to claim 5, characterized in that means are provided as slip-change measuring means comparing the true vehicle speed with the wheel rotational speed.

Claim 8

An installation according to claim 6, wherein said last-mentioned mentioned means includes doppler effect measuring means.

Claim 9

An installation according to claim 7, characterized by monitoring means monitoring an interruption of short circuit in a line in or leading to a generator means which includes means for monitoring the energizing current for the switch means to turn off the blocking prevention effect of the installation in case of such interruption or short circuit.

Claim 10

An installation according to claim 1, wherein said generator means operate by appropriately shaped portions present in at least one of the two parts consisting of wheel and brake.

Claim 11

An installation according to claim 1, wherein said generator means are frequency generators having a frequency-voltage converter means connected in the output thereof.

Claim 12

An installation according to claim 1, characterized in that each generator means is operatively connected with a slip-change measuring means, all slip-change measuring means being connected with an AND circuit means, and the output of the AND circuit means being operatively connected with magnetic valves.

Claim 13

An installation according to claim 11, characterized in that means are provided as slip-change measuring means comparing the true vehicle speed with the wheel rotational speed.

Claim 14

An insTallation according to claim 12, wherein said last-mentioned means includes doppler effect measuring means.

Claim 15

An installation according to claim 13, characterized by monitoring means monitoring an interruption or short circuit in a line in or leading to a generator means which includes means for monitoring the energizing current for the switch means to turn off the blocking prevention effect of the installation in case of such interruption or short circuit.

Claim 16

An installation according to claim 1, characterized by monitoring means monitoring an interruption or short circuit in a line in or leading to a generator means which includes means for monitoring the energizing current for the switch means to turn off the blocking prevention effect of the installation in case of such interruption or short circuit.

Claim 17

An installation for the control of valves in the brake lines of a motor vehicle, which includes generator means driven by the respective wheels and producing an output signal corresponding to rotational speed of the corresponding wheel, each generator means being connected with a control means for controlling the respective valve comprising first means for actuating the respective valve in a closing direction to render the brake at the corresponding wheel ineffective and second means for opening again a respective valve, said first means responding at a predetermined first value of slippage and the second means overriding the control effect of the first means only when said slippage has reached a second predetermined value that is lower than said first value, characterized in that each generator means is operatively connected with a slip-change measuring means, all slip-change measuring means being connected with an AND circuit means, and the output of the AND circuit means being operatively connected with the values.

Claim 18

An installation for the control of valves in the brake lines of a motor vehicle, which includes generator means driven by the respective wheels and producing an output signal corresponding to rotational speed of the corresponding wheel, each generator means being connected with a control means for controlling the respective valve comprising first means for actuating the respective valve in a closing direction to render the brake at the corresponding wheel ineffective and second means for opening again a respective valve, said first means responding at a predetermined first value of slippage and the second means overriding the control effect of the first means only when said slippage has reached a second predetermined value that is lower than said first value, characterized in that each generator means is operatively connected with a slip-change measuring means, all slip-change measuring means being connected with an AND circuit means, and the output of the AND circuit means being operatively connected with the values.

Claim 19

An installation for the control of valves in the brake lines of a motor vehicle, which includes generator means driven by the respective wheels and producing an output signal corresponding to the rotational speed of the corresponding wheel, each generator being connected with a control means for controlling the respective valve comprising first means for actuating the respective valve in a closing direction to render the brake at the corresponding wheel ineffective and second means for opening again a respective valve, said first means responding at a predetermined first value of slippage and the second means overriding the control effect of the first means only when said slippage has reached a second predetermined value that is lower than said first value, characterized by monitoring means monitoring an interruption or short circuit in the installation and operable to render inoperable the blocking prevention effect of the installation in case of such interruption or short circuit.

Claim 20

An installation for the control of valves in the brake lines of a motor vehicle, which includes generator means driven by the respective wheels and producing an output signal corresponding to the rotational speed of the corresponding wheel, each generator being connected with a control means for controlling the respective valve comprising first means for actuating the respective valve in a closing direction to render the brake at the corresponding wheel ineffective and second means for opening again a respective valve, said first means responding at a predetermined first value of slippage and the second means overriding the control effect of the first means only when said slippage has reached a second predetermined value that is lower than said first value, characterized by monitoring means monitoring an interruption or short circuit in the installation and operable to render inoperable the blocking prevention effect of the installation in case of such interruption or short circuit.