Clutch withdrawal system used on utility vehicle

• Main Authors: LINDNER, JOACHIM., 97456 DITTELBRUNN, DE, WILLERT, JOERG.., 97422 SCHWEINFURT, DE, LIEBLER, JUERGEN., 97421 SCHWEINFURT, DE
• Format: Patent
• Language: English; German
• Published: 08.10.1998
• Edition: 6
• 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; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR; ENGINEERING ELEMENTS AND UNITS; FLUID-PRESSURE ACTUATORS; FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HYDRAULICS OR PNEUMATICS IN GENERAL; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; LIGHTING; MECHANICAL ENGINEERING; PERFORMING OPERATIONS; SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; THERMAL INSULATION IN GENERAL; TRANSPORTING; VEHICLES IN GENERAL; WEAPONS

The pneumatic actuating system (10) is for a friction clutch, especially in a utility vehicle. The clutch is accommodated in a bell-housing (12) between the internal combustion engine and the change-speed gearbox. The clutch assembly incorporates a clutch release bearing (32) which is connected to an actuator cylinder (14). This cylinder surrounds the drive input shaft (28) and has an annular working chamber (16) containing a coil spring under pressure. The annular piston (22) has seals (26) on its inner diameter and its outer diameter and presses against the outer race of the clutch withdrawal bearing. Air is brought through first a line (50) from a compressed-air source (51) to a control valve (70) which is connected via a second line (56) to a signal generator (60) in direct connection with the clutch pedal (62).