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:
Aug. 16, 1994
Filed:
Dec. 27, 1991
Winfried Sturmer, Euerbach, DE;
Hans-Jurgen Drexl, Schonungen-Mainberg, DE;
Fichtel & Sachs AG, Schweinfurt, DE;
Abstract
For the protection of an automatized friction clutch of a motor vehicle it is proposed, by means of a computer device (23) to compute periodically data for the instantaneous friction performance of the clutch (5) and to add them up in several also periodically actualized time window stores. The time window stores have different time windows and correspondingly store a range of friction work mean values. Associated with the individual time window stores are respectively several limit values, the magnitude is additionally a function of the air temperature of a clutch casing (37) surrounding the clutch (5). A computer device (23), depending upon the temperature measured by means of a temperature sensor (35) and upon the limit values ruling for this temperature, institutes graded protective measures. For safety reasons, none of the protective measures completely prevents the operativeness of the clutch (5). As the heat loading of the clutch (5) increases only the clutch comfort is increasingly reduced, and as the maximum loading limit is approached, active comfort-impairing measures, such as, e.g., oscillations of a regulating drive (19) of the clutch (5) causing 'grab' of the clutch (5), are brought about.