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US 5,611,301 AGranted
Structural enclosure of combustion engines for the purpose of reducing engine noise
AssigneeSaab Automobile Aktiebolag
InventorsPer Gillbrand, Lars Bergsten
Life of this patent
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Abstract
The invention relates to an engine with a constructional design and material composition for optimum thermal conductivity and vibration damping functions. The invention consists in the cylinder section (11) surrounding the combustion chamber being made of a light metal alloy and in the lower part of the cylinder section being connected to a crankcase section (13) with integral lateral walls (21,22) which enclose the cylinder section (11) with an air gap, and the crankcase section is made of a material with higher density than the cylinder section, preferably cast iron.
Claims16
A combustion engine comprising:
- a cylinder section shaped to define combustion engine cylinders with combustion chambers in the cylinders;
- the cylinder section including an upper end;
- the cylinder section being comprised of a light metal alloy;
- a cylinder head generally at the upper end of the cylinder section;
- a crankcase section including lateral walls surrounding the cylinder section, the lateral walls being spaced from the cylinder section to define an intermediate air gap between the cylinder section and the lateral walls of the crankcase section, the lateral walls of the crankcase section extending up toward the cylinder head;
- the crankcase section being made of a material of a density which exceeds the density of the material of the cylinder section by a factor of at least 2.6;
- the cylinder section having a lower portion away from the cylinder head, and means securing the lower portion of the cylinder section to the crankcase section.
4 more elements
Dependencies are inferred from the claim text.