Patent ID: 6971378

Claim:
An apparatus, comprising: a cast cylinder head for a multi-cylinder internal combustion engine having an internal water jacket and a first longitudinal axis extending from a first end of said cylinder head to a second end of said cylinder head, said cylinder head having an intake passage system formed in the cylinder head for the delivery of a gas to each combustion chamber defined in said cylinder head and an exhaust passage system formed in the cylinder head for the passage of an exhaust gas from each of the combustion chambers; and an exhaust gas recirculation passage formed within said cylinder head and having an inlet proximate said first end of said cylinder head for receiving a portion of the exhaust gas and an outlet proximate said second end of said cylinder head in flow communication with said intake passage system, said exhaust gas recirculation passage having a first passage portion extending along said internal water jacket between said first end of said cylinder head and said second end of said cylinder head and substantially parallel with said longitudinal axis, and said first passage portion is disposed in a heat transfer relationship with said internal water jacket.