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:
Jan. 21, 1992
Filed:
Jun. 15, 1990
Fumihiko Nishiwaki, Hyogo, JP;
Munehiko Mimura, Hyogo, JP;
Mitsubishi Denki K.K., Tokyo, JP;
Abstract
A temperature detection device for an electromagnetic clutch of a vehicle comprises an output circuit operation detection device for detecting an output terminal voltage of the clutch and a current feedback signal corresponding to a clutch current, clutch current a calculation device which responds to running control information and engine control information for providing a clutch current instruction signal and a clutch open signal, responds to the clutch output terminal voltage fedback from the clutch output circuit operation detection device for calculating a clutch voltage by taking a voltage drop in a wiring and a feeding mechanism of the clutch and responds to this clutch voltage and the clutch current corresponding to the current feedback signal for calculating a clutch resistance to thereby calculate a clutch temperature and the clutch current instruction signal and clutch current control device responsive to a deviation between the clutch current instruction signal and the current feedback signal and the open signal for controlling the clutch current of the clutch.