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:
Jun. 03, 2014
Filed:
Oct. 23, 2006
Nikolaus Gerhardt, Oberschleissheim, DE;
Karl Göttl, Rosenheim, DE;
Markus Griner, Germering, DE;
Webasto AG, Stockdorf, DE;
Abstract
The invention relates to a control device () for an engine-independent heater () that heats a liquid heat transfer medium of a heat transfer medium circuit () especially for motor vehicles. Said control device () reduces a heater () capacity when an actual temperature gradient ((dT/dt) of the heat transfer medium is equal to or exceeds a temperature gradient threshold value ((dT/dt)). The control device () determines the temperature gradient threshold value ((dT/dt)) dynamically in accordance with a difference in temperature (Δφ) between a target temperature (φ) of the heat transfer medium and an actual temperature (φ) of the heat transfer medium. The invention further relates to a heater (), a heating system (), and a method for controlling the inventive heater ().