Diesel fueled engine coolant heater

A coolant fluid heater comprising in combination:

• a combustion chamber;
• a fuel-primary air injection nozzle supported by a burner head;
• said combustion chamber being generally cylindrical and defined by said burner head, essentially cylindrical side walls and a bottom plate;
• said cylindrical side walls being defined by an inner burner wall and an outer burner wall with aperture means defined in said inner burner wall;
• said inner burner wall and said outer burner wall together defining a first generally annular space for the passage of exhaust gases which are the products of combustion;
• an inner boiler wall adjacent to but spaced apart from said outer burner wall with aperture means provided in said outer burner wall;
• said outer burner wall and said inner boiler wall defining a second generally annular space for passage of exhaust gases from said first annular space;
• first supply means to admit fuel and primary air, under pressure, to said nozzle;
• means providing for the atomization of fuel at said nozzle for the introduction of a fuel-primary air mixture into said combustion chamber;
• said fuel-primary air mixture being admitted into said combustion chamber in substantially a conical pattern having an axis substantially coincident with the axis of said nozzle;
• second supply means providing for the introduction of secondary air into said combustion chamber, said second supply means providing for the passage of secondary air in a rotating pattern about said nozzle and into said combustion chamber substantially outside of said conical pattern;
• third supply means providing for the introduction of tertiary air into said combustion chamber, said tertiary air being admitted into said combustion chamber at a location spaced apart and downstream from said nozzle and on approximately the center line thereof so as to be introduced within said conical pattern;
• said secondary air and said tertiary air contributing to complete combustion of said fuel both inside and outside of said conical pattern;
• ignition means in said combustion chamber to ignite fuel and air in said combustion chamber to provide for combustion therein;
• means to pass coolant fluid in heat exchange relationship to the products of combustion generated in said combustion chamber.

A coolant fluid heater comprising in combination:

• a combustion chamber;
• a fuel-primary air injection nozzle supported by a burner head;
• said combustion chamber being defined by said burner head, essentially cylindrical side walls, and a bottom plate, said side walls including a generally cylindrical inner burner wall, a generally cylindrical outer burner wall and a generally cylindrical inner boiler wall;
• said inner burner wall and said outer burner wall being concentric and spaced apart to define a first annular space;
• said outer burner wall and said inner boiler wall being concentric and spaced apart to define a second annular space;
• aperture means being provided in said inner burner wall and in said outer burner wall to provide for the flow of exhaust gases in said first annular space and said second annular space;
• first supply means to admit fuel and primary air, under pressure, to said nozzle;
• means providing for the atomization of fuel at said nozzle for the introduction of a fuel-primary air mixture into said nozzle combustion chamber;
• said fuel-primary air mixture being admitted into said combustion chamber in substantially a conical pattern having an axis substantially coincident with the axis of said nozzle;
• second supply means providing for the introduction of secondary air into said combustion chamber;
• said second supply means providing for the passage of secondary air in a rotating pattern about said nozzle and into said combustion chamber substantially outside of said conical pattern;
• third supply means providing for the introduction of tertiary air into said combustion chamber, said tertiary air being admitted into said combustion chamber at a location spaced apart and downstream from said nozzle and on approximately the center line thereof so as to be introduced within said conical pattern;
• said third supply means being comprised of conduit means which is caused to be passed into heat exchange relationship with exhaust gases within said heater in order to provide for the preheating of tertiary air prior to the introduction thereof into said combustion chamber;
• said conduit means for said tertiary air being disposed within said second annular space in heat exchange relationship to exhaust gases flowing in said space;
• said secondary air and said tertiary air contributing to complete combustion of said fuel both inside and outside of said conical pattern;
• ignition means in said combustion chamber to ignite fuel and air in said combustion chamber to provide for combustion therein;
• means to pass coolant fluid in heat exchange relationship to the products of combustion generated in said combustion chamber.

A coolant fluid heater comprising in combination:

• a combustion chamber;
• a fuel-primary air injection nozzle supported by a burner head;
• an air spread cup;
• first supply means to admit fuel and primary air, under pressure, to said nozzle;
• means providing for the atomization of fuel at said nozzle for the introduction of a fuel-primary air mixture into said combustion chamber through said air spread cup;
• said fuel-primary air mixture being admitted into said combustion chamber in substantially a conical pattern having an axis coincident with the axis of said nozzle;
• a secondary air supply means;
• a first generally annular space surrounding the tip portion of said nozzle defined by said air spread cup;
• communication means between said first annular space and said combustion chamber;
• means providing for the introduction of secondary air from said secondary air supply means to said first annular space and into said combustion chamber, the passage of secondary air through said first annular space providing cooling for said nozzle;
• a second generally annular space surrounding the discharge tip of said nozzle;
• means to introduce secondary air from said secondary air supply means to said second annular space in a rotating pattern about said nozzle and into said combustion chamber substantially outside of said conical pattern;
• third supply means providing for the introduction of tertiary air into said combustion chamber, said third supply means being defined by an air pipe extending into said combustion chamber from the bottom portion thereof and approximately concentric with the axis of said conical pattern there being provided discharge means in said air pipe for the introduction of tertiary air within said conical pattern at a location approximately midway between the discharge end of said nozzle and the bottom of said combustion chamber;
• said secondary air and said tertiary air contributing to complete combustion of said fuel both inside and outside of said conical pattern at essentially atmospheric pressure;
• ignition means in said combustion chamber to ignite fuel and air in said combustion chamber to provide for combustion therein;
• means to pass coolant fluid in heat exchange relationship to the products of combustion generated in said combustion chamber.