Apparatus for controlling actuating fluid pressure on vehicular

Details Apparatus for controlling actuating fluid pressure on vehicular Apparatus for controlling actuating fluid pressure on vehicular

1976-06-23

1978-02-07

Wyche, Benjamin W.

192 clutches and power-stop control

Vortex-flow drive and clutch

With brake

192 0076, 192 358, 192 359, 192 82T, 337320, B60K 2100

Patent

active

040722201

ABSTRACT:
A control apparatus provided with an electromagnetic valve assembly to selectively change the variation rate of a fluid pressure to actuate the clutch in dependence on the degree of opening of the throttle valve for the vehicular engine, a pulse-generating logic circuit governs the operational sequence of the electromagnetic valves, and a temperature sensor which includes a reed relay located close to the clutch, a permanent magnet attached to the flywheel of the clutch and a heat-sensitive element capable of varying the magnetic flux density passing through the reed relay when the temperature of the clutch disc exceeds a predetermined temperature. A monostable multivibrator of the control circuit has a variable resistance r-c circuit, and the resistance is varied by a signal from the temperature sensor so that a pulse for determining the duration of a relatively high increase rate of the actuating pressure at an early stage of the clutch engagement can be prolonged to compensate for a decrease in the friction coefficient of the clutch disc at elevated temperatures.

REFERENCES:
patent: 3177993 (1965-04-01), Riehl
patent: 3536176 (1970-10-01), Cappa
patent: 3684071 (1972-08-01), Wheymann
patent: 3709340 (1973-01-01), Murakami et al.

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