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US 4,131,093 AGranted
Internal combustion engines
AssigneeNational Research Development Corporation
InventorWilfred P. Mansfield
Life of this patent
Estimating the term…
Abstract
An internal combustion engine cooled by the forced passage of fluid through ducts, in which such ducts are confined to the individual regions of the engine liable to overheat, the remaining parts of the engine which in operation rise only to acceptable temperatures being left free from such ducts. The invention includes structures to resist separation of the engine components under firing loads and to improve rigidity.
Claims5
An internal combustion engine comprising:
- a cylinder block,
- a plurality of cylinders disposed within said block, each including a cylinder head member and having parts liable in use to overheat, namely means for injecting fuel, a valve seat member, a valve guide member and a small section of the length of the cylinder wall adjacent the head member, less deep axially than the combustion zone;
- said block and head member having a small bore annular duct formed about at least one of said parts and said block and head member having passages connecting said annular ducts in a path between a cooling fluid source and a cooling fluid outlet, said passages comprising only the minimum fluid passages necessary to conduct sufficient fluid directly to and from said annular ducts so as to cool said overheating parts, the remainder of said block and head member including no ducts exclusively for cooling creating substantial cooling effect and situated in use in the path of fluid flow between a source and an outlet for cooling fluid.
An internal combustion engine comprising p1 a cylinder block,
- a plurality of cylinders disposed within said block each including a cylinder head member and having parts liable in use to overheat, namely means for injecting fuel, a valve seat member, a valve guide member and a small section of the length of the cylinder wall adjacent the head member, less deep axially than the combustion zone;
- said block and head member having a small bore cooling duct formed in close proximity with at least one of said parts and said block and head member having passages connecting said ducts in a path between a cooling fluid source and a cooling fluid outlet, said passages comprising only the minimum fluid passages necessary to conduct sufficient fluid directly to and from said ducts so as to cool said overheating parts, the remainder of said block and head member including no ducts exclusively for cooling creating substantial cooling effect and situated in use in the path of fluid flow between a source and an outlet for cooling fluid.
Dependencies are inferred from the claim text.