Spark ignition for motor vehicle combustion heater has a glow plug with two resistances operating in parallel or series depending on switching

摘要

The ignition for a motor vehicle combustion heater has a glow plug (10) with two resistances (12,14). The closure contacts (16,18,20) of the glow plug are positioned so that the resistances are in parallel or series switching circuits. The glow plug can have a sensor for flame monitoring, with the resistances in series. An Independent claim is included for an ignition circuit operating method.