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

1998-06-12

1999-09-28

Lopez, F. Daniel

Power plants

Internal combustion engine with treatment or handling of...

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

60277, 60301, 60290, 60285, 123435, F01N 300

Patent

active

059569484

ABSTRACT:
An exhaust gas-purifying system for an internal combustion engine comprises an exhaust gas-purifying device arranged in the exhaust system of the engine and accommodating a nitrogen oxide absorbent for absorbing nitrogen oxides in exhaust gases emitted from the engine when the engine operates in a state where the air-fuel ratio of the exhaust gases is leaner than a stoichiometric air-fuel ratio. A cylinder internal pressure sensor detects pressure within at least one of the cylinders of the engine. The amount of nitrogen oxides generated within the engine is determined based on the pressure within the at least one of the cylinders. It is determined whether the amount of nitrogen oxides absorbed by the nitrogen oxide absorbent has been saturated, based on the determined amount of nitrogen oxides.

REFERENCES:
patent: 5592919 (1997-01-01), Morikawa
patent: 5636614 (1997-06-01), Morikawa
patent: 5740669 (1998-04-01), Kinugasa et al.

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