| 摘要 |
In a variable compression ratio internal combustion engine that controls the compression of an internal combustion engine by changing the volume of the combustion chamber of the internal combustion engine in an axial direction of the cylinder, when a target compression ratio (epsilont) based on an operating condition of the internal combustion engine is at a reference compression ratio (epsilon0) or greater (S102), the compression ratio is changed to the target compression ratio (S103). When the target compression ratio (epsilont) is lower than the reference compression ratio (epsilon0) (S102), a control is executed to change the compression ratio and also to strength the tumble flow in the combustion chamber (S104).
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