Exhaust emission control apparatus

Details Exhaust emission control apparatus Exhaust emission control apparatus

1996-02-07

1998-08-25

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

By sorber or mechanical separator

60297, 60302, F01N 302

Patent

active

057972630

ABSTRACT:
The exhaust emission containing large and small particles, discharged from an exhaust port of a cylinder No. 1 of an engine during a first exhaust stroke collides with a first adsorbent opposed to the exhaust port, so that some of the small particles of HC enter a connecting gas passage. Since the latter is not connected to a second adsorbent for a cylinder No. 3 in which a second exhaust stroke consecutively occurs, the exhaust gas discharged from the first cylinder can be easily introduced in the first adsorbent and in the connecting gas passage. When the cylinder No. 4 changes to an exhaust stroke, the exhaust gas discharged therefrom is introduced in the connecting gas passage through the corresponding adsorbent to move the HC remaining in the connecting gas passage toward the first adsorbent. Thus, the HC is adsorbed again by the first adsorbent and little is discharged into the air. Consequently, the HC adsorbing efficiency can be enhanced.

REFERENCES:
patent: 5493859 (1996-02-01), Shinohara

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