US 9,803,583 B2 · Double wall self-contained liner

Abstract

A robust engine assembly having reduced weight and efficient cooling, without an increase in fuel consumption or carbon dioxide emissions, is provided. The engine assembly includes a double-wall cylinder liner clamped between a cylinder head and a crankcase. A manifold is disposed along a portion of the cylinder liner and includes fluid ports aligned with fluid ports of the cylinder liner to convey cooling fluid to a cooling chamber located between the walls of the cylinder liner. For example, the manifold can be a low-loss hydraulic manifold cast integral with the crankcase. Tie rods connect the cylinder head to the crankcase to clamp the cylinder liner in position. Alternatively, the tie rods can be connected to a main bearing cradle located beneath the crankcase. No attachment features extend into the walls of the cylinder liner, which is especially advantageous when the cylinder liner is formed of aluminum.

Claims20

Dependent claims

An engine assembly, comprising:

a cylinder liner clamped between a cylinder head and a crankcase;
said cylinder liner including an outer wall surrounding a center axis and extending longitudinally along said center axis from an outer upper end engaging said cylinder head to an outer lower end engaging said crankcase, an inner wall surrounding said center axis and disposed between said outer wall and said center axis, said inner and outer walls presenting a cooling chamber therebetween, and said outer wall including at least one liner fluid port for conveying cooling fluid to or from said cooling chamber;
and
a manifold disposed along a portion of said outer wall between said cylinder head and said crankcase, and said manifold including at least one manifold fluid port aligned with said at least one liner fluid port and at least one channel coupled to said at least one manifold fluid port and extending longitudinally past said outer lower end of said outer wall for conveying said cooling fluid to or from said cooling chamber.

1 more element

Dependencies are inferred from the claim text.

Double wall self-contained liner

Life of this patent

Double wall self-contained liner

Life of this patent

Abstract

Claims20