To control a decrease in efficiency of filling a cylinder with fresh air due to mixture of EGR gas during inertia supercharging by an intake control valve.
An intake control device includes: a tank opening/closing valve (224) for communicating between a tank (223) and an intake passage (204) when the valve is opened and for blocking the communication between the tank and the intake passage when the valve is closed; and a control unit (100) for controlling an EGR valve (242), the tank opening/closing valve, and the intake control valve, when the EGR gas is refluxed by opening the EGR valve, if the intake control valve (226) is controlled so as to start inertia supercharging, such that the tank opening/closing valve is switched from a closed state to an opened state at a delayed timing (T2) which is delayed by a prescribed delay time (DT) from a valve-closing start timing (T1) at which the EGR valve is switched from the opened state to the closed state and such that the inertia supercharging is started after the delayed timing.
ITO YASUSHI
KATSUMATA MASAJI
YOTSUEDA KEIJI
TANNO SHIRO
Koji Yamamoto
Satoshi Nakamura
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