Combustion engine device

Claim 2

An afterburner for the treatment of exhaust gases of a combustion engine having an exhaust pipe, characterized in that an interior main pipe (6) of the afterburner is a continuation of the exhaust pipe of the combustion engine, an exterior pipe (14) enclosing said interior pipe (6) so that an annular chamber is formed around the interior pipe, said chamber having an exit, catalytic material (5) provided in at least one part of the annular chamber, an eccentrically mounted, spring-loaded throttle valve (3,11) is provided in the main pipe (6), there being openings (7) arranged in the main pipe upstream of the throttle valve which divert part of the exhaust gases, dependent on the flow pressure of the exhaust gases and so dependent on the angle of the throttle valve (3) into the annular chamber, said outside pipe (14) decreasing conically at the exit of the annular chamber and forming a ring slot in the area of which both flows are mixed homogeneously with one anOther.

Claim 3

Apparatus for treating exhaust gases from a mixture compressing combustion engine that includes an exhaust pipe and with applied ignition and a catalytic afterburner comprising a coaxial annular chamber surrounding the exhaust pipe, said chamber including inlet and exit ends, at least a portion of said chamber being substantially filled with catalytic material therein for the passage of exhaust gas during idling and partial load, an eccentrically mounted throttle valve mounted in the exhaust pipe at a position intermediate the ends of said annular chamber, inlet openings for the exhaust gases to pass ahead of the throttle from the exhaust pipe into said annular chamber, said annular chamber being longitudinally divided into a heater chamber adjacent said inlet openings and an after-combustion chamber adjacent a discharge conduit therefrom connecting to the exhaust pipe through a conically narrowing outer pipe at the exit end of the annular chamber provided as a suction nozzle, a plurality of heater bodies positioned within said heater chamber comprising electrically heated glow coils, and a series of heaters of high heat capacity providing essentially constant temperature values within said after-combustion chamber, said throttle valve being maintained closed by an adjustment spring so that the throttle valve opens due to dynamic pressure at excessive speed.

Claim 4

Apparatus for treating exhaust gases from a mixture compressing combustion engine that includes an exhaust pipe and with applied ignition and a catalytic afterburner comprising a coaxial annular chamber surrounding the exhaust pipe, said chamber including inlet and exit ends, at least a portion of said chamber being substantially filled with catalytic material therein for the passage of exhaust gas during idling and partial load, an eccentrically mounted throttle valve mounted in the exhaust pipe at a position intermediate the ends of said annular chamber, inlet openings for the exhaust gases to pass ahead of the throttle from the exhaust pipe into said annular chamber, said annular chamber being longitudinally divided into a heater chamber adjacent said inlet openings and an after-combustion chamber adjacent a discharge conduit therefrom connecting to the exhaust pipe through a conically narrowing outer pipe at the exit end of the annular chamber provided as a suction nozzle, a plurality of heater bodies positioned within said heater chamber comprising electrically heated glow coils, and a series of heaters of high heat capacity providing essentially constant temperature values within said after-combustion chamber, said throttle valve being maintained closed by an adjustment spring so that the throttle valve opens due to dynamic pressure at excessive speed.

Claim 5

The apparatus as defined in claim 2, wherein the throttle valve is closed up to a speed of about 50-80 km. per hour.

Claim 6

The apparatus as defined in claim 2, wherein the inlet openings in the direction of flow upstream of the throttle valve are so constructed that at higher flow velocities the dynamic pressure on the throttle valve is increased.

Claim 7

The apparatus as defined in claim 2, wherein the exhaust gases encounter circuitous flow paths in the afterburner.

Claim 8

The apparatus as defined in claim 2, including means to add water, water vapor or steam to the exhaust gas for the afterburner chamber.

Claim 9

The apparatus as defined in claim 2, wherein an outlet of the exhaust pipe adjacent said exit end is of such dimensions that even at full load and with the choke valve wide open, a portion of the exhaust gas flows via the after burner chamber.

Claim 10

The apparatus as defined in claim 2, wherein at a tapering end of the exhaust pipe the partial flow led over the catalytic material is intimately mixed with the main flow via an annular slit in the same direction of flow thereof.