Combustion control apparatus for internal combustion engine
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United States of America Patent
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Apr 3, 2018
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app pub date -
Jan 30, 2015
filing date -
Mar 10, 2014
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Abstract
A combustion control apparatus for an internal combustion engine includes a spark plug for performing spark ignition of an air-fuel mixture in the combustion chamber, a plurality of coil pairs for generating spark discharge in the spark plug, and a fuel injection valve capable of injecting atomized fuel. Atomized fuel is injected into the intake passage, and a homogeneous lean air-fuel mixture is formed in the combustion chamber. The air-fuel ratio of the air-fuel mixture in the combustion chamber is controlled to be leaner than a predetermined lean air-fuel ratio. A spark discharge start timing and a spark discharge continuation time period are controlled using the plurality of coil pairs. The spark discharge start timing is set to a timing advanced from the spark discharge start timing for igniting a stratified lean mixture, such that the air-fuel ratio in the vicinity of the spark plug is relatively small.
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