EVAPORATED-FUEL TREATMENT DEVICE OF MULTI-CYLINDER INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To uniformly supply intake air and evaporated fuel into each cylinder in a multi-cylinder engine in which a throttle valve is installed in each intake branch pipe connected to each cylinder.

SOLUTION: The downstream side of the throttle valve in each intake branch pipe connected to each cylinder communicates with a balance tube. A branch purge passage is connected to the downstream side of the throttle valve in each intake pipe. The diameter of the connection part of the purge passage to the intake branch pipe is smaller than the diameter of the connection part of the balance tube to the intake branch pipe.

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