Title: Method of braking a vehicle having an antiskid brake circuit, and a modulator for such a circuit

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Abstract: A method of braking a vehicle having an antiskid brake circuit of the type having a modulator of which the modulator chamber is connected to a set of brake actuators, and a plunger projecting into the chamber, the plunger being moved by way of a driving assembly operated by a motor driven by an antiskid control device, responsive to rotary motion of the vehicle. The curve ploting the variation with time, in the volume of the modulation chamber from the position of maximum penetration by the plunger follows substantially the same course as the absorption curve for the set of brake actuators connected to the modulator. This absorption curve represents the increase in pressure in the brake actuator as a function of the increase in the volume of fluid contained in the brake actuator. A hydraulic pressure modulator for an antiskid brake circuit for a braked vehicle which comprises a housing containing a modulation chamber capable of being connected to a set of brake actuators for a vehicle and a plunger slidable in the housing and projecting into the chamber. The plunger is moved by way of a driving assembly operated by an antiskid control device responsive to rotary motion of at least one wheel of the vehicle, so as to permit variation of the braking pressure in the brake actuators. The driving assembly comprises a mechanical transmission with a cam driven by a continuously rotating electric motor. The angular motion of the cam in a given direction is associated with motion of the plunger in a given direction; whereas angular motion of the cam in the opposite direction causes motion of the plunger in the opposite direction. Each angular movement of the cam is responsive to rotation of the motor, said rotation being controlled by a signal generated by the antiskid device.


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