The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 25, 2014
Filed:
May. 26, 2009
Ender Ergun, St. Marein, AT;
Manfred Gollner, Hellgenkreuz am Waasen, AT;
Martin Parigger, Eggersdorf, AT;
Ender Ergun, St. Marein, AT;
Manfred Gollner, Hellgenkreuz am Waasen, AT;
Martin Parigger, Eggersdorf, AT;
Magna Powertrain AG & Co KG, Lannach, AT;
Abstract
A clutch unit () comprises a wet friction clutch for controllable transmission of a torque from an input element () to an output element (), housing that contains the friction clutch and oil for cooling the friction clutch, and an actuator () for actuating the friction clutch. The actuator is attached to the housing in a thermally conductive way and has a temperature sensor () for sensing a temperature of the actuator. In order to computationally determine the oil temperature (T) in the clutch unit (), a thermal input power to the clutch unit is determined as a function of at least a speed of the input element and/or of the output element. The difference between the thermal input power and the thermal output power is determined, and the oil temperature is determined as a function of the difference that was determined.