| 摘要 |
<p>Clutch Protection System A clutch protection system to guard against overheating due to excessive slippage in a friction clutch (12) having an engagement means which applies an engagement pressure to the clutch. The system which is particularly suitable for use with a tractor power take-off clutch includes sensing means (18,19) to provide signals indicative of the input and output speeds of the clutch and an indicating device (56) which receives a first signal (I) indicative of the clutch input speed and a second signal (X) indicative of either the clutch output speed when the clutch engagement pressure is applied or the clutch input speed when the clutch engagement pressure is not applied. The indicating device has a signal level indicative of the difference between the first and second signals minus a signal (S) indicative of the cooling effect on the clutch due to its own rotation. Comparison means (56) compare the signal level of the indicating device with a predetermined signal level indicative of a clutch operating condition and response means are responsive to a predetermined comparison result to action a warning device (40) and/or disengage the clutch when the predetermined clutch operating condition occurs. The system may be digital using a digital counter as the indicating device or may be analogue.</p> |
