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:
Dec. 02, 1997
Filed:
Jun. 07, 1996
Joachim Froeschl, Herrsching, DE;
Gerhart Huemer, Munich, DE;
Dieter Wittelsberger, Munich, DE;
Wolfgang Schmidt, Neuburg, DE;
Heinz Lemberger, Unterfoehring, DE;
Guenter Ranzinger, Garching, DE;
Dietmar Franz, Eching, DE;
Ralf Weiss, Emmering, DE;
Bayerische Motoren Werke Aktiengesellschaft, Munich, DE;
Abstract
A coolant temperature control system for an internal-combustion engine in a motor vehicle having an electrically heatable thermostatic valve whose method of operation can be shifted by electrical heating in the radiator operation direction. Control devices are provided for recognizing a defect of another system in the motor vehicle which controls the coolant flow. When a defect of this other system is recognized, the thermostatic valve is heated. Particularly when a defect is recognized, the heating of the thermostatic valve is controlled such that the coolant temperature is maintained below a preset coolant temperature threshold. Preferably, the recognition of a defect is carried out by means logically monitoring output signals of the other system.