Closed loop pulse modulated viscous fan control

A clutch comprises viscous fluid circulated between shear surfaces (488.98) of an input shaft (18), e.g. vehicle engine driven, and of an output member (60), e.g. a cooling fan. The fluid circulation is modulated by a valve (158) operated by an actuator (30) in response to a periodic pulsed signal,...

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Bibliographische Detailangaben
Hauptverfasser:	MOHAN, ROBERT J, O'NEIL, WALTER K
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING BRAKES CLUTCHES COOLING OF INTERNAL-COMBUSTION ENGINES COOLING OF MACHINES OR ENGINES IN GENERAL COUPLINGS FOR TRANSMITTING ROTATION ENGINE PLANTS IN GENERAL ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING STEAM ENGINES THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	A clutch comprises viscous fluid circulated between shear surfaces (488.98) of an input shaft (18), e.g. vehicle engine driven, and of an output member (60), e.g. a cooling fan. The fluid circulation is modulated by a valve (158) operated by an actuator (30) in response to a periodic pulsed signal, e.g. indicating temperature, generated by a control means (176), e.g. in response to rotational speed signals.