Air intake device for engine

An air intake device for an engine, the air intake device comprising:

• an intake passage leading intake air to combustion chambers of a multi-cylinder engine;
• an exhaust passage discharging exhaust gas from the combustion chambers;
• an exhaust gas recirculation (EGR) passage connecting the intake passage with the exhaust passage and returning a portion of the exhaust gas as EGR gas from the exhaust passage to the intake passage;
• and
• an EGR valve of a poppet type provided to a connection port to the intake passage and configured to adjust a returning amount of the EGR gas, wherein
• the EGR passage includes, in a position close to the connection port, an expanding portion in which a passage cross-sectional area expands and which lowers a flow speed of the EGR gas so as to reduce an uneven flow, in the connection port, of the EGR gas flowing into the intake passage,
• the EGR passage further includes a passage portion extending toward the connection port and in a direction intersecting with the intake passage and intersecting with a center line of the connection port,
• the intake passage includes a folded portion folded in a curved manner and a bypass passage leading the intake air to the combustion chambers,
• the connection port of the EGR passage is positioned near and downstream of the folded portion, and
• a valve shaft of the EGR valve passes through the bypass passage.