Electric heating device for a vehicle
AssigneeMorgan & Finnegan, L.L.P.
InventorHorst Jirmann
Life of this patent
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Abstract
A heating device has PTC heating thermistors connected in groups, and a circuit for selectively turning on one or more groups. At least two of the groups have different rated heating powers. The circuit turns on the selection of the groups at least on the basis of the available electrical power. A method for electrically heating a vehicle is also disclosed.
Claims11
An electrical heating device, in particular a PTC heating device, for a vehicle, having a plurality of heating resistors, in particular PTC heating thermistors, which are connected in groups, and having a circuit by means of which one or more groups can be turned on selectively, wherein the circuit turns on a selection of the groups at least on the basis of the available electrical power:
A method for electrically heating a vehicle by using electrical heating elements, in particular PTC heating elements, which are connected in groups, with the step of turning on one or more groups, wherein the said step of turning-on is carried out in relation to a selection of groups, at least on the basis of the available power.
Dependencies are inferred from the claim text.