Louvered exhaust port liner

Details Louvered exhaust port liner Louvered exhaust port liner

1976-12-27

1978-06-27

Casaregola, Louis J.

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

60305, F01N 310

Patent

active

040966909

ABSTRACT:
An internal combustion engine cast housing is provided with an exhaust port liner in the exhaust passage, the exhaust port liner having contact solely with the cast housing at a flange clamped about the outlet of said passage. The liner is formed of sheet metal and is provided with one or more louvers or apertures partially punched out of the mid-section of the sheet metal liner body. The metal material of said punching is hinged and bent inwardly at an angle to define an air foil or baffle for controlling mixing of exhaust gases and of secondary air admitted through said apertures and to serve as a hot surface for facilitating continued chemical reactions. Metallic seals are formed as annular protrusions from the sheet metal body to define a trapped air space about the liner body and located upstream of the louvered apertures. The emission content, and particularly the hydrocarbon content of the exhaust gases is reduced by secondary chemical conversion within the confines of said exhaust passage liner and by appropriate control of the influx of secondary air preferably during the exhaust cycle. The chemical reaction temperature within said exhaust port liner is lowered to facilitate chemical conversion, and the louvers provide a holder for stabilizing the chemical conversion front within said liner.

REFERENCES:
patent: 2295436 (1942-09-01), Tendler
patent: 3729937 (1973-05-01), Haddad
patent: 3759040 (1973-09-01), Peltomaki
patent: 3984977 (1976-10-01), Morita et al.
patent: 4041916 (1977-08-01), Iida et al.

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