EXHAUST EMISSION CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE

Title:

EXHAUST EMISSION CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE

Document Type and Number:

Japanese Patent JP3900054

Kind Code:

B2

Abstract:

PROBLEM TO BE SOLVED: To vary an intake air amount to a target excess air ratio with good response when combustion is transferred to rich combustion by reducing the intake air amount to regenerate an NOx trap catalyst.
SOLUTION: When the regenerating time of the NOx trap catalyst is determined, a throttle valve is closed, and the valve opening characteristics of intake/exhaust valves are switched to reduce the intake air amount, the capacity of an intake air collector part is reduced, or air in an intake air collector is sucked by a negative pressure source to positively lead circulated exhaust gas therein so as to lower the concentration of oxygen in the collector.

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Inventors:

Takashi Shinshiro

Application Number:

JP2002273105A

Publication Date:

April 04, 2007

Filing Date:

September 19, 2002

Export Citation:

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Assignee:

Nissan Motor Co., Ltd

International Classes:

F01N3/24; F02M35/10; B01D53/86; B01D53/94; F01N3/02; F01N3/08; F01N3/20; F02D13/02; F02D21/08; F02D43/00; (IPC1-7): F01N3/24; B01D53/86; B01D53/94; F01N3/02; F01N3/08; F01N3/20; F02D13/02; F02D21/08; F02D43/00; F02M35/10

Domestic Patent References:

JP2002221021A
JP2001115822A
JP2002227671A
JP3294631A
JP11107840A
JP62000138U

Attorney, Agent or Firm:

Tomijio Sasashima

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