Engine structure
AssigneeNational Research Development Corporation
InventorsWilfred Percival Mansfield, Theodor Priede
Life of this patent
Estimating the term…
Abstract
An internal combustion engine structure in which the cylinder head and main bearing caps are linked by a framework of members including pairs of tension members each angled obliquely to the direct line between head and caps. The members of the framework are arranged so as to bear a substantial proportion of the firing loads of the engine in tension or compression without bending, thus relieving other parts of the engine, especially its outer surfaces, from loads under which they would tend to bend and thus emit noise. The framework may also serve to strengthen parts of the engine wall to make it less susceptible to bending.
Claims11
An internal combustion engine having an engine body including:
- a cylinder structure including cylinders;
- a cylinder head structure;
- main bearings;
- said cylinder structure having parts constituting a first direct load-bearing linkage between said cylinder head structure and said main bearings, whereby to resist without bending the load set up by the firing forces in said cylinders and rending to separate said cylinder head structure and said main bearings;
- a crankshaft lying lengthwise of said engine body and supported by said main bearings, and
- a second direct load-bearing linkage to afford further resistance to the separation of said cylinder head structure from said main bearings by the firing forces set up in said cylinders, in which
- said second linkage comprises at least one pair of straight-line links, strong in tension;
- a first connection between a first end of a first said link of said pair and said cylinder head structure;
- a second connection between a first end of a second said link of said pair and said main bearings;
- both said links are angled obliquely to the direct line lying between said first and second connections and to each other, so that unobstructed space is left between said links and said direct line, said first and second ends of each said link thus being transversely spaced from each other;
- a third connection is provided between said second ends of said first and second links, and
- a stabilising member supports said third connection and stabilises it against movement transverse relative to said engine body.
Dependencies are inferred from the claim text.