| 摘要 |
The invention relates to a method for operating a fuel-operated auxiliary heater (10) in a motor vehicle, wherein by means of at least one fuel type sensor (18a-f), the type and/or composition of a fuel (26) which is provided for combustion in the auxiliary heater (10) or which burns or is burned in the auxiliary heater (10) is determined, and a control unit (12) for controlling the auxiliary heater (10) sets present operating parameters as a function of the determined fuel type and/or composition. In order to avoid damage during relatively long standstill times, it is proposed that the standstill time of the auxiliary heater (10) following a previous operation of the auxiliary heater (10) is measured and compared with a threshold value which is determined as a function of the fuel type and/or composition determined during the previous operation of the auxiliary heater (10), and that, if an exceedance of the threshold value is determined, the control unit (12) generates and outputs a signal in order to initiate renewed operation of the auxiliary heater (10). By means of the embodiment according to the invention, it is obtained that fuel-type-dependent maximum standstill times of the auxiliary heater (10) are not exceeded. The invention also relates to a corresponding auxiliary heater (10). |
