Hydraulic system useful for the control of motor vehicles, comprises a lubricant having a specific density greater than that of the hydraulic fluid or that is insoluble in the hydraulic fluid.

摘要

A hydraulic system preferably for a motor vehicle comprises a subsidiary cylinder consisting of a casing with an axially arranged sealed piston and an inlet for hydraulic fluid as well as a master cylinder whereby at least one sealing face between a piston and casing has a lubricant having a specific density greater than that of the hydraulic fluid or that is insoluble in the hydraulic fluid. A hydraulic system preferably for a motor vehicle comprises a subsidiary cylinder consisting of a casing with an axially arranged sealed piston and an inlet for hydraulic fluid as well as a master cylinder consisting of a casing with an axially arranged sealed piston and an outlet for hydraulic fluid with interconnecting pipework between the inlet and outlet as well as a pressure medium for filling the hydraulic system and optionally a hydraulic fluid reservoir whereby at least one sealing face between one of the pistons and the corresponding casing has a lubricant having a specific density greater than that of the hydraulic fluid or that is insoluble in the hydraulic fluid.