Exhaust gas purification by gas reaction in exhaust catalyst

Details Exhaust gas purification by gas reaction in exhaust catalyst Exhaust gas purification by gas reaction in exhaust catalyst

1996-10-23

1998-06-16

Argenbright, Tony M.

Power plants

Internal combustion engine with treatment or handling of...

Methods

60284, 60285, 60289, F01N 320

Patent

active

057653682

ABSTRACT:
In an engine, if a catalytic converter is not in the activated region, a fuel injection rate is corrected to increase, and a secondary air is introduced from a secondary air feed port into a catalytic converter. Even immediately after the cold start of the engine, the fuel injection rate is increased to be richer in fuel than the stoichiometric air/fuel ratio to feed the secondary air simultaneously, so that the temperatures of the catalytic converter and the exhaust gas can be kept over the activation temperature by the heat of the reaction of the increased fuel in the catalytic converter thereby to improve the exhaust gas purification.

REFERENCES:
patent: 4209981 (1980-07-01), Miyamori et al.
patent: 5184463 (1993-02-01), Becker et al.
patent: 5483946 (1996-01-01), Hamburg et al.
patent: 5501073 (1996-03-01), Miyashita et al.
patent: 5537321 (1996-07-01), Yoshizaki et al.
patent: 5577383 (1996-11-01), Kuroda et al.

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