Brunswick Corporation

Clayton T Rasmussen

Alexander K Monroe

Raymond J Donahue

Kevin R Anderson

Terrance M Cleary

Daniel P Hoffman

Gregory Roberts

Dennis J Stephany

A marine engine has a cylinder block defining at least one cylinder bore and a cylinder liner providing a running surface for a piston in the cylinder bore. The cylinder liner is non-axisymmetric relative to a center axis of the cylinder liner. The cylinder block defines a pocket that retains the cylinder liner and prevents the cylinder liner from rotating about the center axis. Novel cylinder liners, assemblies and methods are provided for forming a marine engine having the cylinder block with the cylinder liner formed therein.

Marine engines, cylinder liners for marine engines, and methods and assemblies for forming marine engines

A slide for the high pressure die casting of at least one closed deck engine block having at least one cylinder is disclosed. The slide includes a tool steel portion with reliefs for forming a water jacket surrounding each cylinder. At least one expendable core is located in each relief, the expendable core having an inner surface and an outer surface with an aperture extending therethrough. The outer surface and inner surface of the expendable core is coextensive with an inner surface and outer surface of the tool steel portion. A method for high pressure die casting a closed deck engine block using the disclosed slide and expendable cores is also disclosed. The expendable cores are separable from the reliefs in the slide, and form bridges or supports across a water jacket to add stiffness and rigidity to the cast engine cylinders.

Slides and expendable cores for high pressure die cast closed deck engine block

A slide for the high pressure die casting of at least one closed deck engine block having at least one cylinder is disclosed. The slide includes a tool steel portion with reliefs for forming a water jacket surrounding each cylinder. At least one expendable salt core is located in each relief, the salt core having an inner surface and an outer surface with an aperture extending therethrough. The outer surface and inner surface of the salt core is coextensive with an inner surface and outer surface of the tool steel portion. A method for high pressure die casting a closed deck engine block using the disclosed slide and expendable salt cores is also disclosed. The expendable salt cores are separable from the reliefs in the slide, and form bridges or supports across a water jacket to add stiffness and rigidity to the cast engine cylinders.

Growing community of inventors

North Fond du Lac, WI, United States of America

Clayton T Rasmussen