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:
May. 18, 2010
Filed:
Jun. 27, 2006
Ellen Greifenstein, Darmstadt, DE;
Wolfgang Haege, Oberheimbach, DE;
Dirk Wexel, Mainz, DE;
Jurgen Thyroff, Harxheim, DE;
Ellen Greifenstein, Darmstadt, DE;
Wolfgang Haege, Oberheimbach, DE;
Dirk Wexel, Mainz, DE;
Jurgen Thyroff, Harxheim, DE;
GM Global Technology Operations, Inc., Detroit, MI (US);
Abstract
A system and method for operating a cooling fluid pump and cooling fluid heater in a vehicle when the vehicle is not being used so that the temperature of the cooling fluid does not drop to low in a cold environment. The system includes an AC connector for plugging the system into an AC power outlet. The system also includes AC/DC converter that converts the AC power to a DC signal suitable to operate the pump. The system also includes a temperature switch that closes if the ambient temperature falls below a predetermined temperature, which electrically connects the AC connector to the AC/DC converter. When the AC/DC converter is powered, a switch is closed to connect the pump to a pulse width modulation (PWM) generator to operate the pump. Further, when the temperature switch is closed, power is provided to the heater.