Exhaust gas-purifying system for internal combustion engines

Details Exhaust gas-purifying system for internal combustion engines Exhaust gas-purifying system for internal combustion engines

1995-03-16

1996-08-13

Heyman, Leonard E.

Power plants

Internal combustion engine with treatment or handling of...

Material from exhaust structure fed to engine intake

60277, 60297, 60311, F01N 318

Patent

active

055444822

ABSTRACT:
An exhaust gas-purifying system for an internal combustion engine has an adsorbing device arranged in an exhaust passage thereof for adsorbing or desorbing unburnt component contained in exhaust gases. An exhaust gas recirculation passage branches off from the exhaust passage at a branch point downstream of the adsorbing device and extending to an intake passage of the engine for returning exhaust gases flowing through the adsorbing device to the intake passage. The path of exhaust gases is changed to selectively introduce the exhaust gases containing the unburnt components into the exhaust gas recirculation passage. The adsorbing capacity of the adsorbing device is checked based on a manner of change in an air-fuel ratio of exhaust gases detected when the exhaust gases are introduced into the exhaust gas recirculation passage.

REFERENCES:
patent: 5125231 (1992-06-01), Patil et al.
patent: 5184462 (1993-02-01), Schatz
patent: 5307627 (1994-05-01), Christensen et al.
patent: 5315824 (1994-05-01), Takeshima
patent: 5375414 (1994-12-01), Adamczyk, Jr. et al.
patent: 5388405 (1995-02-01), Fujishita et al.

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