| 摘要 |
<p>A clutch device for a vehicle, including a spring device ( 4 ), which attempts to force a friction plate ( 3 ) in a first direction for engagement of the clutch, a pneumatic actuator ( 10 ) with a cylinder ( 11 ) and a piston ( 16 ), which divides the cylinder ( 11 ) into a main chamber ( 20 ) and an auxiliary chamber ( 21 ), and a compressed air source ( 31 ), which is arranged via a controllable valve device ( 32,33 ) for communication with the main chamber ( 20 ) for movement of the friction plate ( 3 ) in a second, opposite direction for disengagement of the clutch. The clutch device includes a computer ( 50 ) with a memory ( 54 ), wherein there is stored a desired auxiliary force exerted against the release bearing ( 19 ) as a second function (C 2 ) of the release bearing's ( 19 ) position. The clutch device further includes a sensor ( 22 ), which is arranged to establish the release bearing's position, and a sensor ( 23 ), which is arranged to establish the pressure of the air in the auxiliary chamber. A valve device ( 36 ) can connect the compressed air source ( 31 ) with the auxiliary chamber ( 21 ), and the computer ( 50 ) can receive signals from the sensors ( 22,23 ), establish any difference between the measured auxiliary chamber pressure and the desired auxiliary chamber pressure and control the controllable valve device and the valve device ( 32,33,36 ) in accordance with the difference and thereby provide the auxiliary force.</p> |
