INTAKE DEVICE FOR INTERNAL COMBUSTION ENGINE

Japanese Patent JP3829818

B2

PROBLEM TO BE SOLVED: To strengthen a tumble in a cylinder 2 and prevent a reverse flow of intake air from the cylinder 2 without excessively reducing an opening ratio of an intake port 5.
SOLUTION: A partition wall 11 provided in the intake port 5 along a longitudinal direction to divide the intake port 5 into a first flow path 5A in an upper side and a second flow path 5B in a lower side. An intake control valve 31 is arranged in an upstream side of the partition wall 11, and a gap 12 is formed between the partition wall 11 and a valve body 33. When the intake control valve is in a closing position, the intake air is restricted to flow only in the first flow path 5A in the upper side, at the same time a low pressure region is generated in a downstream side of the valve body 33, and the intake air is taken in from a downstream end of the second flow path 5B due to differential pressure to reflow to the first flow path 5A through the gap 12. Thus, a flow rate of the air passed through a valve gap in the lower side of an intake valve 7 is reduced and the flow rate of the air passed through the valve gap in the upper side is increased to strengthen the tumble. A masking area is provided on a part of a peripheral edge of a valve opening 43 so as not to generate the reverse flow of the intake air through the valve gap in the lower side.

Kensuke Tominaga
Taro Sakai

JP2003113600A

October 04, 2006

April 18, 2003

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Nissan Motor Co., Ltd

F02B31/00; F02B31/04; F01L3/06; F01L3/20; F02B31/08; F02F1/42; F02M69/00; (IPC1-7): F02B31/00; F01L3/06; F02F1/42; F02M69/00

JP11166420A
JP8296535A
JP2002155748A
JP60128935U
JP10252477A
JP9079040A
JP3164523A
JP6264816A
JP2002054535A

Tsuyoshi Hashimoto
Hiromichi Kobayashi
Tomioka Kiyoshi

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