Exhaust emission control device

Claim 2

In an exhaust emission control device comprising an oxidation reaction chamber connected to an exhaust manifold of an internal combustion engine to receive exhaust gases therefrom, and a vortical combustion chamber receiving a supply of secondary air and secondary fuel to produce an air-fuel mixture therein which is ignited to burn in flames in vortical form, said flames in vortical form being blown from said vortical combustion chamber into said oxidation reaction chamber so as to subject unburned components of the exhaust gases in the oxidation reaction chamber to recombustion, the improvement in that at least a portion of said vortical combustion chamber extends into said oxidation reaction chamber so that the exhaust gases introduced into said oxidation reaction chamber through said exhaust manifold may be brought into direct contact with outer wall surfaces of the vortical combustion chamber, and wherein fuel vaporizers made of a heat resisting porous material comprise a central fuel exit portion and peripheral fuel exit portion of one wall of said vortical combustion chamber so as to facilitate vaporiZation of the secondary fuel in the vortical combustion chamber.

Claim 3

The exhaust emission control device of claim 1, wherein said central fuel exit portion is disposed around an ignition means.

Claim 4

An exhaust emission control device comprising: an oxidation reaction chamber for receiving exhaust gases from an internal combustion engine: a cylindrical vortical combustion chamber having means for introducing secondary fuel thereto and means for introducing secondary air thereto tangentially to the inner surface of said cylindrical chamber, for producing an air-fuel mixture therein for burning in a vortical flame blown from said vortical chamber through an open end thereof into said oxidation reaction chamber for subjecting unburned components of said exhaust gases to recombustion, said cylindrical vortical combustion chamber extending along the direction of its axis into said oxidation reaction chamber, and the outside surface of said vortical chamber being adjacent an exhaust gas inlet opening in said oxidation reaction chamber, for directly contacting exhaust gases entering said reaction chamber with said outside surface of said vortical chamber, and a fuel vaporizer of heat resistant porous material at a closed end of said cylindrical vortical combustion chamber, said vaporizer comprising a central fuel exit portion near the axis of said cylindrical chamber and a peripheral fuel exit portion near the inner surface of said cylindrical chamber.

Claim 5

An exhaust emission control device comprising: an oxidation reaction chamber for receiving exhaust gases from an internal combustion engine: a cylindrical vortical combustion chamber having means for introducing secondary fuel thereto and means for introducing secondary air thereto tangentially to the inner surface of said cylindrical chamber, for producing an air-fuel mixture therein for burning in a vortical flame blown from said vortical chamber through an open end thereof into said oxidation reaction chamber for subjecting unburned components of said exhaust gases to recombustion, said cylindrical vortical combustion chamber extending along the direction of its axis into said oxidation reaction chamber, and the outside surface of said vortical chamber being adjacent an exhaust gas inlet opening in said oxidation reaction chamber, for directly contacting exhaust gases entering said reaction chamber with said outside surface of said vortical chamber, and a fuel vaporizer of heat resistant porous material at a closed end of said cylindrical vortical combustion chamber, said vaporizer comprising a central fuel exit portion near the axis of said cylindrical chamber and a peripheral fuel exit portion near the inner surface of said cylindrical chamber.

Claim 6

The exhaust emission control device of claim 3 wherein said oxidation reaction chamber is also cylindrical, and said cylindrical oxidation reaction chamber and said cylindrical vortical combustion chamber are substantially coaxial.

Claim 7

The exhaust emission control device of claim 3, wherein said central fuel exit portion is disposed around an ignition means.