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209results about How to "Large mass" patented technology

Multiple-clutch device

The invention is directed to a multiple-clutch device, such as a double-clutch device, for arranging in a drivetrain of a motor vehicle between a drive unit and a transmission, wherein the clutch device has a first clutch arrangement associated with a first transmission input shaft of the transmission and a second clutch arrangement associated with a second transmission input shaft of the transmission for transmitting torque between the drive unit and the transmission. According to one aspect of the invention, it is suggested that plates in a plate stack of a clutch arrangement constructed as a plate clutch arrangement which have at least one friction facing can be brought into frictional engagement with plates having no friction facing, wherein at least one of the plates not having a friction facing is thicker in axial direction than friction facing carrying elements of adjacent plates having at least one friction facing. Alternatively or in addition, it is suggested that at least one plate which has at least one friction facing of sintered material and at least one plate which has at least one friction facing made of another friction facing material are provided in the plate stack, wherein the other friction facing material has a progressive frictional coefficient curve (dlambd / dDELTAN) in relation to a slip speed (DELTAN).
Owner:ZF FRIEDRICHSHAFEN AG +1

Thermo-magnetic actuator

A thermo-magnetic actuator includes a housing; a chamber within the housing; a working fluid changing phase upon heating and located in the chamber; an electrical heater disposed within the chamber for heating the working fluid upon application of electrical power to the electrical heater; a piston rod slidably disposed in the housing and movable between a retracted position, retracted with respect to the housing, and an extended position extending substantially outward of the housing, the piston rod being driven and sliding from the retracted position to the extended position in response to heating of the working fluid by the electrical heater; a spring biasing the piston rod toward the retracted position; an electromagnet disposed at an end of the housing and generating a magnetic field when an electric current is supplied to the electromagnet; and a ferromagnetic target assembly attached to the piston rod, sliding within the housing, and attracted toward the electromagnet, when an electrical current flows through the electromagnet, to maintain the piston rod in the extended position even if electrical power is no longer applied to the heater. Preferably, the position of the piston rod is detected by the actuator and electrical current flow to the electrical heater is terminated when the piston rod is detected at the extended position.
Owner:THERMOTION ACQUISITION
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