Control apparatus for an internal combustion engine capable...

Internal-combustion engines – Combustion chamber means having fuel injection only – Combustible mixture stratification means

Reexamination Certificate

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Details

C123S304000, C123S305000, C123S02500R

Reexamination Certificate

active

07421999

ABSTRACT:
An electric control device70is applied to an internal combustion engine10capable of a pre-mixed charge compression ignition combustion in which air-fuel mixture gas including air and fuel injected from an injector37is formed in a combustion chamber25, and the air-fuel mixture gas is self-ignited to be combusted by compressing the air-fuel mixture gas during a compression stroke. The electric control device injects high pressure fluid such as air from the air injection valve38into the air-fuel mixture gas at a predetermined acting timing within a compression stroke prior to fuel pyrolysis starting timing to enhance the temperature un-uniformity of the air-fuel mixture gas. This enables the temperature un-uniformity of the air-fuel mixture gas at the fuel pyrolysis starting timing to become larger than the temperature un-uniformity of the air-fuel mixture gas at the fuel pyrolysis starting timing obtained only by simply compressing the air-fuel mixture gas during the compression stroke. As a result, the combustion is moderated and the combustion noise is reduced.

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