Exhaust gas purifying apparatus for internal combustion engine
AssigneeHonda Motor Co., Ltd.
InventorsIsao Chiba, Ryuji Matsukado
Life of this patent
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Abstract
An exhaust gas purifying apparatus for an internal combustion engine includes a particulate filter for trapping particulates found in the exhaust gases of the engine. The regeneration process for burning the particulates trapped in the particulate filter is executed by performing post injection of fuel. The regeneration process is suppressed according to an amount of fuel injected during post injection.
Claims18
An exhaust gas purifying apparatus for an internal combustion engine, comprising:
- a particulate filter which traps particulates in exhaust gases of said engine;
- regeneration means for executing a regeneration process wherein the particulates trapped in said particulate filter are burned by performing a post injection of fuel;
- control means for suppressing the regeneration process by said regeneration means according to an amount of fuel injected during the post injection;
- and
- travel distance calculating means for calculating a travel distance of a vehicle driven by said engine, wherein said control means sets an upper limit threshold value according to the travel distance from the time the regeneration process has been completed;
- and
- wherein said control means calculates an integrated value of the amount of fuel injected during the post injection, and suppresses the regeneration process when the integrated value equals or is greater than an upper limit threshold value.
An exhaust gas purifying method for an internal combustion engine having a particulate filter which traps particulates in exhaust gases of said engine, said method comprising the steps of:
- a) executing a regeneration process for burning the particulates trapped in said particulate filter by performing post injection of fuel;
- b) suppressing the regeneration process according to an amount of fuel injected during the post injection;
- and
- c) calculating a travel distance of a vehicle driven by said engine, wherein an upper limit threshold value is set according to the travel distance from the time the regeneration process has been completed;
- and
- wherein an integrated value of the amount of fuel injected during the post injection is calculated, and the regeneration process is suppressed when the integrated value equals or is greater than an upper limit threshold value.
A computer program embodied on a computer-readable medium, for causing a computer to implement an exhaust gas purifying method for an internal combustion engine having a particulate filter which traps particulates in exhaust gases of said engine, said method comprising the steps of:
- a) executing a regeneration process for burning the particulates trapped in said particulate filter by performing post injection of fuel;
- b) suppressing the regeneration process according to an amount of fuel injected during the post injection;
- and
- c) calculating a travel distance of a vehicle driven by said engine, wherein an upper limit threshold value is set according to the travel distance from the time the regeneration process has been completed;
- wherein an integrated value of the amount of fuel injected during the post injection is calculated, and the regeneration process is suppressed when the integrated value equals or is greater than an upper limit threshold value.
Dependencies are inferred from the claim text.