Abstract Exhaust gases emanating from an internal combustion engine, such as an Otto-cycle engine, have a swirl imparted thereto by a twist generator to expand the exhaust gases and to reduce the pressure thereof. Air is aspirated into the expanded exhaust gases for admixture therewith to provide a combustible gas-air mixture which is delivered to a diffusor for after-burning of the toxic ingredients of the exhaust gases with an increase in pressure of the products of combustion. The exhaust gases flowing to the twist generator pass through a heat exchanger serving to preheat the combustion air. The twist generator may be a set of stationary whirl-imparting vanes, or may be the rotor of an exhaust gas turbo charger directly driving an air compressor which delivers the air through the heat exchanger to the turbo charger, with some of the compressed air being delivered back to the engine. The flow area of the outlet of the twist generator is adjustable to adjust the quantity of air aspirated into the exhaust gases supplied to the diffusor.
Apparatus for the detoxification of the exhaust gases of an internal combustion engine having an exhaust gas discharge line, said apparatus comprising in combination, a twist generator connected to said discharge line to receive the exhaust gas, said twist generator imparting a whirl to the exhaust gases and expanding the exhaust gases to a substantially reduced pressure for the discharge through an outlet; an air supply line communicating with said outlet for aspiration of combustion air into the expanded exhaust gases at said outlet for admixture with the exhaust gases to provide a combustible gas-air mixture; and a diffusor connected to said outlet to receive the combustible mixture for after-burning of the toxic ingredients of the exhaust gases in said diffusor with an increase of pressure of the products of combustion; said twist generator comprising the turbine of an exhaust gas turbo-supercharger; and a compressor driven by said turbine and supplying air to said air supply line.
Claim 2
Dependent Claim
157 words
Apparatus for the detoxification of the exhaust gases of an internal combustion engine having an exhaust gas discharge line, said apparatus comprising in combination, a twist generator connected to said discharge line to receive the exhaust gas, said twist generator imparting a whirl to the exhaust gases and expanding the exhaust gases to a substantially reduced pressure for the discharge through an outlet; an air supply line communicating with said outlet for aspiration of combustion air into the expanded exhaust gases at said outlet for admixture with the exhaust gases to provide a combustible gas-air mixture; and a diffusor connected to said outlet to receive the combustible mixture for after-burning of the toxic ingredients of the exhaust gases in said diffusor with an increase of pressure of the products of combustion; said twist generator comprising the turbine of an exhaust gas turbo-supercharger; and a compressor driven by said turbine and supplying air to said air supply line.
Claim 3
Dependent Claim
38 words
The apparatus according to claim 1, characterized in that only a part of the air supplied by said compressor is used for the after-combustion, while the remainder of said supplied air is directed to the engine for supercharging.
Claim 4
Dependent Claim
68 words
The apparatus according to claim 1, characterized in that said exhaust gas turbine (T) and said compressor (V) are arranged on a common shaft and that the turbine (T) is designed as a substantially radial flow-type turbine with external inflow and axial outflow, said turbine including a rotor (5) actuable as a twist generator, said radial flow-type diffusor being disposed at the discharge outlet of said turbine rotor.