| 摘要 |
A clutch for a vehicle having a change speed gear box transmission automatically performs control functions which have heretofore required skilled manipulation of a clutch pedal or the like by the operator. Springs exerting an engagement force on the clutch plates react against a movable piston which responds to a centrifugally generated fluid pressure to increase the spring force as a function of engine speed at the lower range of engine speeds. To facilitate start-ups and to avoid stalling, additional springs automatically disengage the clutch at the idling range of engine speed. The springs and variable fluid pressure provide modulated engagement or disengagement within an intermediate range of speeds and further means engage the clutch with a fixed clutch capacity at normal operating speeds. Fluid signal means force disengagement during shift transients at higher engine speeds. Clutch action differs under different operating conditions in a manner conforming with skilled manual control of a clutch under similar conditions.
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