Brake Control Unit

摘要

A brake control unit includes a primary piston and a secondary piston that respectively define a primary chamber and a secondary chamber. The primary piston carries an intermediate piston that slides in the secondary piston. A primary insulating seal is disposed between the pistons such that the primary insulating section of the primary insulating seal only depends on the equivalent section connecting the force applied at the inlet and the secondary pressure. The ratio of the hydraulic sections is configured to be modified without having to intervene on the primary and secondary pressure seals for the main piston and the secondary seal by way of modifying the section of the plunger piston and that of the seal thereof.

主权项

1. A brake control unit, comprising:
a primary piston defining a primary chamber connected to a primary circuit; a secondary piston defining a secondary chamber connected to a secondary circuit, the primary piston configured to push against the secondary piston so as to generate a pressure inside the primary chamber which then exerts a hydraulic thrust on a rear cross section of the secondary piston; a braking demand signal supplied via a push-rod actuated by a driver, the brake control unit configured to receive the braking demand signal; a displacement sensor configured to detect the braking demand signal for the movement of the push-rod in order to control the primary piston; and a plunger piston carried by the primary piston, the plunger piston being integral in translation with the primary piston and penetrating freely into the secondary piston such that the primary chamber is defined between the primary piston, the secondary piston in their bore and the plunger piston, wherein the primary piston has a primary pressure seal, the secondary piston has a secondary pressure seal, and the plunger piston is equipped with a primary insulating seal for its engagement in the secondary piston, such that
the primary piston has a front hydraulic cross section equal to the difference in its primary pressure cross section and in its primary insulating cross section,the secondary piston has a rear hydraulic cross section equal to the difference between its secondary insulating cross section and its primary insulating cross section, andthe front cross section of the secondary piston is connected to the equivalent cross section connecting the inlet force to the secondary pressure by the equationS1b=ASe-BSe-C,and
wherein the equation indicates the primary insulating cross section and the diameter of the primary insulating seal as a function of the equivalent cross section.