| 摘要 |
<p>PCT No. PCT/EP85/00453 Sec. 371 Date May 7, 1986 Sec. 102(e) Date May 7, 1986 PCT Filed Sep. 6, 1985 PCT Pub. No. WO86/01864 PCT Pub. Date Mar. 27, 1986.A clutch protection system to guard against overheating due to excessive slippage in a friction clutch (12). The system which is particularly suitable for use with a tractor power take-off clutch includes sensors (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 indicative of the cooling effect on the clutch due to its own rotation. A comparator (56) compares the signal level of the indicating device with a predetermined signal level indicative of, for example, a potentially damaging clutch operating condition and actuates a warning device (40) and disengages the clutch when the predetermined clutch operating condition occurs.</p> |
