Patent · US Active

External control of a vehicle coolant pump with remote heating option

US7716938B2 · kind B2 · utility

0Cited by

6References

19Claims

0Family size

Assignee

GM GLOBAL TECHNOLOGY OPERATIONS LLC · US

Inventors

Ellen Greifenstein · Darmstadt, DE
Wolfgang Haege · Oberheimbach, DE
Dirk Wexel · Mainz, DE
Jurgen Thyroff · Harxheim, DE

Key dates

Filing date	Jun 27, 2006
Grant date	May 18, 2010
Priority date	—
Expiry date	Dec 21, 2028

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T90/40
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.