Auxiliary heating device for a passenger compartment of an a vehicle, has fuel feed and/or combustion air feed controlled in dependence on indicated air density

摘要

The auxiliary heating device has a burner (14) supplied via a fuel feed (16) and a combustion air feed (18), either or both of which are controlled by a signal representing the air density of the combustion air, obtained by evaluation of the revs and power requirement of an electric fan motor. (32,44). Also included are Independent claims for the following: (a) an automobile with an auxiliary heating device; (b) a method for providing an air density signal for the air feed to an auxiliary heating device