Exhaust gas recirculation apparatus

An exhaust gas recirculation apparatus for recirculating exhaust gas of an engine from an exhaust passage to an intake passage, the apparatus comprising:

• an exhaust gas cooler for cooling exhaust gas recirculated to the intake passage;
• a housing connected with the exhaust gas cooler via a cooler mount face, the housing having a valve chamber communicated with four exhaust ports including first and second exhaust ports, the first and second exhaust ports being adjacent to each other and opened in the cooler mount face;
• a selector valve rotatably accommodated in the valve chamber for controlling communication among the four exhaust ports;
• and
• a rotation axis rotatably supporting the selector valve,
• wherein the housing has a partition extending from the cooler mount face close to the valve chamber, and the partition dividing the first and second exhaust ports,
• the housing has a first exhaust passage for leading exhaust gas from the engine into the exhaust gas cooler through the valve chamber,
• the housing further has a second exhaust passage for recirculating exhaust gas, which is cooled in the exhaust gas cooler, to the intake passage through the valve chamber,
• the housing further has a bypass passage for leading exhaust gas from the engine through the valve chamber to bypass the exhaust gas cooler,
• the rotation axis is substantially perpendicular to a cooler-mount-face axis passing through a center of the cooler mount face, and
• the rotation axis is offset away from the partition of the housing.