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:
Nov. 20, 2012
Filed:
Oct. 12, 2007
Jürgen Brust, Lorch, DE;
Rolf Merte, Heidelberg, DE;
Klaus Lehmann, Oberderdingen, DE;
Andreas Mulczet, Affalterbach, DE;
Jürgen Brust, Lorch, DE;
Rolf Merte, Heidelberg, DE;
Klaus Lehmann, Oberderdingen, DE;
Andreas Mulczet, Affalterbach, DE;
BERU Aktiengesellschaft, Ludwigsburg, DE;
Abstract
The invention relates to a method for operating an electric add-heater in a motor vehicle having at least one rechargeable electrochemical cell as a power source and an electric generator which is connected with the cell and is driven by a drive engine of the motor vehicle and by which an electric add-heater can be supplied with current when the drive engine is running. It is provided according to the invention that in case of need the add-heater can be supplied with current even when no current is supplied by the generator, by switching over the add-heater to at least one electrochemical cell as a power source, monitoring the charging condition of at least one electrochemical cell, and interrupting the power supply of the electric add-heater realized by the at least one monitored electrochemical cell again when the charging condition of the at least one monitored electrochemical cell has dropped below a lower limit value.