Flame glow plug for a diesel engine

A flame glow plug for a Diesel engine comprising:

• a cylindrical glow plug body, an insert structure mounted on said glow plug body for supplying fuel thereto, a heating rod centrally disposed in said cylindrical glow plug body and being mounted thereto at one end and having an opposite free end, said heating rod including a heating coil and, adjacent its free end, a control coil, a full vaporizing tube surrounding said heating rod in spaced relationship therefrom so as to form an annular intermediate space therebetween receiving a vaporizing sieve, a flame tube connected to said plug body and having a free end extending axially beyond said heating rod so as to be disposed in the path of the intake air when said glow plug is installed in an engine for protecting the free end of said heating rod, said flame tube having flow passages formed therein and an inner tube extending from said free end of said flame tube backwards up to said flow passages and having a diameter larger than the diameter of said vaporizing tube, said vaporizing tube extending axially down to said flow passages and defining with said heating rod a mixing chamber, said vaporizer tube having, adjacent said mixing chamber, an inwardly projecting collar supporting said vaporizing sieve and defining a narrow annular gap around said heating rod and having, between said collar and its free end thereof, at least one circumferential row of openings providing for good air and fuel mixture and for scavenging cooling of said mixing chamber.