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:
Oct. 05, 1999
Filed:
Feb. 03, 1997
Gerhart Huemer, Munich, DE;
Heinz Lemberger, Unterfoehring, DE;
Winfrid Eckerskorn, Ottobrunn, DE;
Christian Absmeier, Hoergertshausen, DE;
Axel Temmesfeld, Raubling, DE;
Victor Brost, Aichtal, DE;
Karl Schuetterle, Walddorfhaeslach, DE;
Klaus Kalbacher, Rangendingen, DE;
Bayerische Motoren Werke Aktiengesellschaft, Munich, DE;
Modine Laengerer & Reich GmbH, Filderstadt, DE;
Abstract
In order to control the temperature of the transmission oil of a motor vehicle driven by a liquid-cooled engine, a coolant/transmission oil heat exchanger is provided. The coolant stream supplied to the heat exchanger is miscible in a thermostatic valve from recooled and non-recooled coolant in order to achieve a desired temperature. Preferably the thermostatic valve is controlled by the temperature of the transmission oil, but it is also possible to have two expanding material elements as control pistons of the thermostatic valve, with one control piston being provided in the oil chamber of the thermostatic valve and the other control piston being provided in the coolant mixing chamber of the thermostatic valve. It is also possible, for purposes of precontrol, to electrically heat at least one of the control pistons.