Patent ID: 6883471

Claim:
A cooling system for an engine, comprising: an engine having a plurality of cylinders, said plurality of cylinders being aligned with each other without a coolant conduit extending completely between adjacent ones of said plurality of cylinders, said plurality of cylinders being aligned along an axis which extends through the centers of said plurality of cylinders, said first cooling, passage changing direction at a first region from a first direction generally toward said axis to a second direction generally away from said axis; a first cooling passage configured to direct a first stream of coolant in thermal communication with each of said plurality of cylinders; a cavity formed adjacent to and in fluid communication with said first cooling passage; and a downstream protuberance, formed at a first intersection of a surface of said first cooling passage and a surface of said cavity, to induce a portion of said first stream of coolant within said first cooling passage to join a vortical flow of coolant within said cavity.