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|1. (WO2017154783) INTERNAL COMBUSTION ENGINE INTAKE DEVICE|
|Applicants:||HONDA MOTOR CO., LTD.
|Title:||INTERNAL COMBUSTION ENGINE INTAKE DEVICE|
In the present invention, an intake port 42 and an exhaust port 43 are formed so as to extend from a combustion chamber 36 of an internal combustion engine in mutually separating directions, and an intake passage 80 is formed by connecting an inlet pipe 6 to the intake port 42. A carburetor 7 is connected to an upstream-side of the inlet pipe 6, and a partition plate part 85 of the intake passage 80 partitions the intake passage 80 into a second intake passage 80B that is close to a lower end 71a of an opening/closing valve 71 of the carburetor 7, the lower end 71a being a leading end when the opening/closing valve 71 is closed, and a first intake passage 80A that is the part of the intake passage 80 excluding the second intake passage 80B. The carburetor 7 is connected to an upstream end 80a of the intake passage 80; and an inner wall part 70b of the carburetor 7, against which the leading end 71a of the opening/closing valve 71 of the carburetor 7 is pressed when the opening/closing valve 71 is closed, and an upstream end 85a of the partition plate part 85 are disposed at positions corresponding to an intake flow direction with respect to a displacement direction of the opening/closing valve 71. Due to this configuration, tumble flow is readily generated inside the combustion chamber when the load is low, the collision of intake air in a downstream part of the intake passage can be suppressed, and an existing carburetor can be used.