Through the purge aisle and the purge aisle which can provide

摘要

PROBLEM TO BE SOLVED: To restrain turbulence of the air-fuel ratio by supply of secondary air.;SOLUTION: This evaporated fuel control device has a canister of adsorbing evaporated fuel generated from a fuel tank, a purge passage arranged between the canister and an intake system of an internal combustion engine and purging the evaporated fuel to the intake system, and a flow control means for controlling a flow rate of the evaporated fuel supplied to the intake system via the purge passage. An increase in the flow rate of the evaporated fuel by the flow control means for controlling a purge flow rate, is restrained when detecting the secondary air supplied from the downstream side of a suction air volume detecting means (an air flowmeter) on the basis of intake pipe pressure and the suction air volume arranged in an intake pipe and passing through a throttle valve. Thus, when the supply of the secondary air is stopped, the air-fuel ratio can be prevented from becoming overrich.;COPYRIGHT: (C)2007,JPO&INPIT