A derivative circuit (17), different to the circuit (15) containing the non return valve (16), has a cylinder (18), with differential pistons (22,23). Its larger diameter chamber (19) is connected to the section (5a) going to the master cylinder (2) and has a volume equal to that of the master cylinder (2). Its smaller diameter chamber (20) is connected on the section (5b) going to the slave cylinder (3) and has a volume less than that of that cylinder (3). The piston (22,23) travel is limited by an adjustable screw so that, in the anti-theft position, the volume of fluid absorbed by the chamber (20) is less than the volume necessary to supply the piston (12) from its de clutching to clutching position. ADVANTAGE - Avoids retaining fluid under pressure in the clutch cylinder after the driver releases the clutch pedal.
展开▼
