| 摘要 |
A gasoline engine applied for dual continuously variable valve timing is provided to reduce manufacturing cost and to prevent decrease of engine output by eliminating a traditional swirl generating device and creating a swirl through the dual CVVT and an exhaust valve masking, and by preventing an increase of air intake friction due to a complicated shape of an intake port. A gasoline engine applied for dual continuously variable valve timing comprises the followings: a cylinder head(10) including at least two intake valves opening and closing an air path flowing into a combustion chamber, and a first and a second exhaust valve(17,18) opening and closing an exhaust gas path flowing from the combustion chamber at different time; a cylinder block including a cylinder to accommodate a piston, and forming the combustion chamber above the piston by connecting with the cylinder; and an exhaust valve masking(50) installed at a side of one of the exhaust valve, to create a swirl by guiding the exhaust gas(internal EGR) flowing reversely to the combustion chamber to one direction at a valve overlap interval of an opened state of the intake valve and an opened state of the exhaust valve. The internal EGR increases in the valve overlap interval when only one of the first and the second exhaust valve is closed.
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