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AssigneesWebasto Thermosysteme GmbH, Webasto Thermosystems Ltd.
InventorsErnst Mosig, Gunter Kahnau, Shahrzad Rahbar, Helmut Schmitter, Chris Kulaga, Frank David Williamson
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The invention relates to motor vehicle heating device with a burner, to which combustion air is supplied via combustion air inlet openings by means of a fan and to which furthermore fuel gas is supplied via a fuel gas supply line, combustion air and fuel gas entering on the intake side of the fan. It is provided according to the invention for a simpler structure and good mixing of the fuel gas/combustion air mixture that entry of fuel gas is controlled by means of a valve or switch controlled by the negative pressure of the fan. Fuel gas is supplied in doing so, preferably, with a negative pressure which is less than atmospheric pressure. For especially simple control of gas supply, there is a membrane which causes the fuel gas supply line to close when the fan stops.
Motor vehicle heating device comprising a burner, a fan for supplying a mixture of combustion air and fuel to the burner, a fuel gas supply line for supplying fuel gas to an intake side of the fan, and pressure responsive flow control means for controlling delivery of the fuel gas from said supply line to said fan as a function of a pressure differential between the intake side of the fan and a delivery side of the fan;
Dependencies are inferred from the claim text.