CLUTCH SERVO WITH SPECIAL DYNAMIC SEALING MEANS PROVIDED IN THE REGION OF THE PISTON ROD

• Main Authors: TASNÁDI, Tibor, HÖS, Levente
• Format: Patent
• Language: English; French; German
• Published: 11.01.2017
• Subjects: ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES; ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; BLASTING; BRAKES; CLUTCHES; COUPLINGS FOR TRANSMITTING ROTATION; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; LIGHTING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; THERMAL INSULATION IN GENERAL; TRANSPORTING; VEHICLES IN GENERAL; WEAPONS

The present invention relates to a clutch servo for boosting a hydraulic clutch pedal foot force by means of pneumatic pressure, comprising: - a piston rod (2), to which hydraulic pressure can be applied at a distal end via a hydraulic chamber (16) arranged in a housing (1), for the purpose of direct activation of the clutch, - a pneumatic booster piston (60) which is attached to the piston rod (2) and which can be acted on by compressed air from a pneumatic chamber (54) arranged in a housing (1) in order to additionally boost the clutch force, - a hydraulic control element (22), the position of which controls the feeding of compressed air to the booster piston (60), said position being influenced hydraulically by the clutch pedal force. The hydraulic chamber (16) is sealed with respect to the adjacent pneumatic chamber (54) with dynamic sealing means which are arranged in the region of the piston rod (2) and the dynamic sealing means are composed of - a hydraulic seal (3) which is arranged in the region of the distal end of the piston rod (2) and acts in an externally sealing fashion with respect to the hydraulic chamber (16), and - a pneumatic seal (4) which is arranged on the housing side and acts in an internally sealing fashion with respect to the piston rod (2).