| 摘要 |
<p>A clutch for a vehicle transmission includes a centrifugal overspeed relief valve for disengaging the clutch when overspeed is imminent. The clutch is frictionally engaged by hydraulic pressure. When overspeed is imminent, the overspeed relief valve vents the hydraulic pressure engaging the clutch so as to disengage the clutch plates. When overspeed is corrected, the valve again closes and the clutch plates are re-engaged.</p> |
