Control device for internal combustion engine
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United States of America Patent
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-
Oct 23, 2018
Grant Date -
Jan 11, 2018
app pub date -
Jun 30, 2017
filing date -
Jul 6, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
Intake holes at the opposite ends are opened and closed by first intake valves. The middle intake hole is opened and closed by a second intake valve. A control device includes an intake variable valve device. First branch channels are connected to the intake holes and produce a normal tumble flow. A second branch channel is configured such that the flow rate of intake air passing through the middle intake hole is relatively greater on the side closer to the outer periphery of the combustion chamber. Where increasing the flow coefficient is given a higher priority, a three-valve drive mode is selected. Where the strength of the normal tumble flow is enhanced, a two-valve drive mode is selected. Where production of the normal tumble flow is reduced, a one-valve drive mode is selected.
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