Exhaust gas recirculation device of multi-cylinder engine

An exhaust gas recirculation device for recirculating, from an exhaust system to an intake system, a part of exhaust gas discharged from each of a plurality of cylinders that are provided to a multi-cylinder engine as EGR gas, the device comprising:

• a single EGR pipe extending from the exhaust system toward the intake system of the engine;
• an EGR manifold provided to branch from a downstream end portion of the EGR pipe toward each of the plurality of cylinders;
• and
• an EGR valve for adjusting an amount of EGR gas to be recirculated to each cylinder through the EGR pipe and the EGR manifold,
• wherein the EGR manifold includes:
• one or more common EGR passages having a single pipe portion extending from the downstream end portion of the EGR pipe, and branched pipe portions extending while branching from the single pipe portion and provided to communicate with intake ports of two or more of the plurality of cylinders of which the combustion order is not adjacent therebetween;
• and
• one or more independent EGR passages extending from the downstream end portion of the EGR pipe and provided to communicate with an intake port of a specific cylinder, and
• wherein shapes of the one or more common EGR passages and the one or more independent EGR passages are respectively set so that a communicating path in the EGR manifold which communicates an arbitrary cylinder with a subsequent cylinder where a combustion is performed next to the arbitrary cylinder has the same volume for any combination of the cylinders of which the combustion order is adjacent therebetween.