| 摘要 |
In a motor vehicle with an all-wheel drive, which is equipped with a thrust and anti-lock control device, each wheel brake has assigned to it a pressure modulator, within which a control-pressure space, into which the outlet pressure of a brake unit can be fed, and an outlet-pressure space, to which a particular wheel brake is connected, are limited by a control piston. This control piston ensures the hydraulic separation of the control circuit from the outlet circuit. Two drive pistons supported on the control piston limit, within the modulator housing, two drive-pressure spaces which, by being connected alternately to the outlet of an operating-pressure source, can control pressure build-up and pressure-reduction control movements of the control piston. To control the connection of the drive-pressure spaces to this operating-pressure source, there are two-way solenoid valves which can be activated by means of output signals from an electronic control unit provided jointly for the anti-lock control and the thrust control.
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