Multi-cylinder engine

A multi-cylinder engine, comprising:

• an engine body having a first cylinder group comprised of a first plurality of cylinders disposed adjacent to each other, and a second cylinder group comprised of a second plurality of cylinders disposed adjacent to each other and provided adjacent to the first cylinder group;
• a first exhaust passage group having a first plurality of independent exhaust passage parts connected to the first plurality of cylinders of the first cylinder group, respectively, and a first collective exhaust passage part collecting the first plurality of independent exhaust passage parts at downstream ends in an exhaust gas flow direction, and having an opening at the downstream side in the exhaust gas flow direction;
• a second exhaust passage group having a second plurality of independent exhaust passage parts connected to the second plurality of cylinders of the second cylinder group, respectively, and a second collective exhaust passage part collecting the second plurality of independent exhaust passage parts at downstream ends in the exhaust gas flow direction, and having an opening at the downstream side in the exhaust gas flow direction;
• and
• an exhaust gas recirculation (EGR) passage connected at one end to a first independent exhaust passage part of the first plurality of independent exhaust passage parts and connected at the other end to an intake passage,
• wherein in a plan view of the first exhaust passage group and the second exhaust passage group in cylinder axis directions, the first exhaust passage group and the second exhaust passage group are disposed adjacent to each other,
• wherein in the plan view, a second independent exhaust passage part and a third independent exhaust passage part of the first plurality of independent exhaust passage parts, different from the first independent exhaust passage part to which the EGR passage is connected, are connected to the first collective exhaust passage part so that a first directing axis of the first independent exhaust passage part, a second directing axis and a third directing axis of the second independent exhaust passage part, and a fourth directing axis and a fifth directing axis of the third independent exhaust passage part converge at the first collective exhaust passage part so as to be directed to a connection of the first independent exhaust passage part, the second independent exhaust passage part, and the third independent exhaust passage part to the first collective exhaust passage part,
• wherein in the plan view, the opening of the second collective exhaust passage part is offset toward the first exhaust passage group in a lineup direction of the second plurality of independent exhaust passage parts,
• wherein the engine body has a cylinder head,
• wherein the first exhaust passage group having the first plurality of independent exhaust passage parts and the first collective exhaust passage part are formed in the cylinder head, and
• wherein the second exhaust passage group having the second plurality of independent exhaust passage parts and the second collective exhaust passage part are formed in the cylinder head.