Apparatus for controlling the exhaust emissions from internal combustion engines

Claim 1

An apparatus for controlling the exhaust emissions from an internal combustion engine the combination comprising: a pair of exhaust collecting conduits each being positioned to collect exhaust gasses from the internal combustion engine in a timing sequence such that exhaust gasses enter one of said conduits at a time when exhaust gasses do not enter the other of said conduits; a pulse converter which includes a pair of inlet nozzles having a common wall, a mixing tube and a diffuser, said diffuser being coupled to an exhaust pipe, said inlet nozzles being coupled to said pair of exhaust collecting conduits; positive pressure means for blowing secondary air in the immediate vicinity of each cylinder outlet prior to entry into the exhaust collecting conduits and for initiating the reaction of said exhaust gases; said exhaust pipe including a reaction section at its end immediately adjacent the pulse converter; and means for thermally insulating at least a portion of said exhaust collecting conduits, the entire pulse converter and the entire reaction section, whereby the primary mixing of said secondary air with said exhaust gases takes place within said pulse converter, and the primary reaction of the exhaust gases takes place within said diffuser and said reaction section.

Claim 2

An apparatus for controlling the exhaust emissions from an internal combustion engine the combination comprising: a pair of exhaust collecting conduits each being positioned to collect exhaust gasses from the internal combustion engine in a timing sequence such that exhaust gasses enter one of said conduits at a time when exhaust gasses do not enter the other of said conduits; a pulse converter which includes a pair of inlet nozzles having a common wall, a mixing tube and a diffuser, said diffuser being coupled to an exhaust pipe, said inlet nozzles being coupled to said pair of exhaust collecting conduits; positive pressure means for blowing secondary air in the immediate vicinity of each cylinder outlet prior to entry into the exhaust collecting conduits and for initiating the reaction of said exhaust gases; said exhaust pipe including a reaction section at its end immediately adjacent the pulse converter; and means for thermally insulating at least a portion of said exhaust collecting conduits, the entire pulse converter and the entire reaction section, whereby the primary mixing of said secondary air with said exhaust gases takes place within said pulse converter, and the primary reaction of the exhaust gases takes place within said diffuser and said reaction section.

Claim 16

An apparatus for controlling the exhaust emissions from a six-cylinder engine having the cylinders arranged in a straight line the combination comprising: a pair of exhaust collecting conduits each being coupled to one half of the cylinders of the engine in a predetermined manner so that the exhaust gases are discharged alternately into each of the respective exhaust collecting conduits, said pair of exhaust collecting conduits including a substantially straight elongated tubular conduit having a first diameter for a portion thereof and a second diameter greater than that of said first diameter for the remaining portion thereof, a partition wall disposed in said portion having said second diameter so as to form a pair of adjacent exhaust collecting conduits; a pulse converter section which includes a pair of inlet nozzles, a mixing tube and diffuser, said inlet nozzles ends thereof being coupled to said pair of exhaust collecting conduits at the end having said second diameter; positive pressure means for introducing secondary air in the immediate vicinity of each cylinder outlet; and means for thermally insulating at least a portion of said exhaust collecting conduits, said pulse converter and at least a portion of said exhaust pipe so as to form a thermally insulated reaction section wherein the exhaust gases from the engine are reacted in order to control the exhaust emissions therefrom.

Claim 17

An apparatus for controlling the exhaust emissions from a six-cylinder engine having the cylinders arranged in a straight line the combination comprising: a pair of exhaust collecting conduits each being coupled to one half of the cylinders of the engine in a predetermined manner so that the exhaust gases are discharged alternately into each of the respective exhaust collecting conduits, said pair of exhaust collecting conduits including a substantially straight elongated tubular conduit having a first diameter for a portion thereof and a second diameter greater than that of said first diameter for the remaining portion thereof, a partition wall disposed in said portion having said second diameter so as to form a pair of adjacent exhaust collecting conduits; a pulse converter section which includes a pair of inlet nozzles, a mixing tube and diffuser, said inlet nozzles ends thereof being coupled to said pair of exhaust collecting conduits at the end having said second diameter; positive pressure means for introducing secondary air in the immediate vicinity of each cylinder outlet; and means for thermally insulating at least a portion of said exhaust collecting conduits, said pulse converter and at least a portion of said exhaust pipe so as to form a thermally insulated reaction section wherein the exhaust gases from the engine are reacted in order to control the exhaust emissions therefrom.

Claim 18

An apparatus for controlling the exhaust emissions from a rotary piston engine the combination comprising: a pair of tubular exhaust collecting conduits each being coupled to the engine in a predetermined manner so that the exhaust gases are discharged alternately into each of the respective exhaust collecting conduits; a reaction section including a mixing tube and diffuser portion, said mixing tube being in communication with each of said pair of exhaust collecting conduits, said reaction section being further characterized in that it is in a looped configuration with the portion thereof coupled to said exhaust collecting conduits being of a smaller diameter than that of the outlet end thereof; positive pressure means for introducing secondary air in the immediate vicinity of each rotary piston exhaust outlet; and means for thermally insulating said reaction section so as to form a thermally insulated reaction section wherein the exhaust gases from the engine are reacted in order to control the exhaust emissions therefrom.

Claim 19

An apparatus for controlling the exhaust emissions from a rotary piston engine the combination comprising: a pair of tubular exhaust collecting conduits each being coupled to the engine in a predetermined manner so that the exhaust gases are discharged alternately into each of the respective exhaust collecting conduits; a reaction section including a mixing tube and diffuser portion, said mixing tube being in communication with each of said pair of exhaust collecting conduits, said reaction section being further characterized in that it is in a looped configuration with the portion thereof coupled to said exhaust collecting conduits being of a smaller diameter than that of the outlet end thereof; positive pressure means for introducing secondary air in the immediate vicinity of each rotary piston exhaust outlet; and means for thermally insulating said reaction section so as to form a thermally insulated reaction section wherein the exhaust gases from the engine are reacted in order to control the exhaust emissions therefrom.