Internal combustion engine with die castable loop transfer system
AssigneeBrunswick Corporation
InventorDavid J. Hale
Life of this patent
Estimating the term…
Abstract
An in-line, multi-cylinder, two-cycle loop charged engine 10 has transfer passages 21, 22, and 23 partially formed by cavities die-cast in the cylinder block 14. The transfer passages are completed by covers, 24 and 25 bolted to the block 14. An efficient loop charging system is thus provided in a completely die-cast cylinder block.
Claims11
An in-line, multi-cylinder, two-cycle, loop charged engine of the type having at least two transfer passages for each cylinder to transfer an air-fuel charge from the crankcase to the combustion chamber, each of said transfer passages having an inlet opening and an inlet port through the wall of a cylinder, said engine including a die-cast cylinder block comprising:
- (A) a bank of parallel cylinders;
- (B) a first transfer cavity for each of said cylinders defining a portion extending from said inlet opening to said inlet port of a first one of said transfer passages, said first cavity being free of projections which would prevent the withdrawal of a forming die in a first lateral direction,
- and
- (C) an exhaust cavity for each of said cylinders defining an exhaust passage, said exhaust cavities being free of projections which would prevent the withdrawal of a forming die in said first direction.
Dependencies are inferred from the claim text.