Internal combustion engine with NOx absorbent catalyst

Details Internal combustion engine with NOx absorbent catalyst Internal combustion engine with NOx absorbent catalyst

1998-06-09

2000-09-12

Denion, Thomas

Power plants

Internal combustion engine with treatment or handling of...

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

60285, 60276, 123674, F01N 310

Patent

active

061160237

ABSTRACT:
For proper treatment of NOx released from NOx absorbent catalyst as well as HC and CO in exhaust gas, a measure of A/F of exhaust gas downstream of the NOx absorbent is used as the input to a feedback control loop. The feedback control loop alters a feedback correction factor (or coefficient) of a fuel control command applied to each fuel injector in such a direction to decrease a deviation of the actual A/F input from a target A/F (stoichiometry or rich) When the measure of A/F has switched the side to rich, a measure of A/F of exhaust gas upstream of the NOx absorbent catalyst is used as the input to perform usual feedback control loop to maintain lean combustion mode.

REFERENCES:
patent: 5448887 (1995-09-01), Takeshima
patent: 5657627 (1997-08-01), Akazaki et al.
patent: 5713199 (1998-02-01), Takeshima et al.
patent: 5715679 (1998-02-01), Asanuma et al.
patent: 5735119 (1998-04-01), Asanuma et al.
patent: 5740676 (1998-04-01), Agustin et al.

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