Method of obtaining a longer stroke on an existing engine

Details Method of obtaining a longer stroke on an existing engine Method of obtaining a longer stroke on an existing engine

1992-05-05

1993-03-30

Okonsky, David A.

Internal-combustion engines

Adjustable combustion chamber

Piston in head adjusted

123 78C, 1231933, F02B 7504

Patent

active

051974320

ABSTRACT:
Engines are needed to perform a variety of functions in a variety of horsepowers. The subject method of obtaining a longer stroke on an existing engine makes it possible to increase the horsepower capabilities without replacing or modifying the cylinder block or cylinder head. The method includes replacing the existing crankshaft with a crankshaft having a larger throw "T" to increase the stroke length of the engine. In order to compensate for the increased stroke length, a spacer is provided. In addition, the existing connecting rod with the outer swing path "S" is replaced with a connecting rod having an outer swing path "S". In order to avoid interference with the block the existing connecting rod bolts are replaced with connecting rod bolts having reduced diameter shanks and angularly disposing the bolts in relation to a connecting rod axis. The compression ratio os the long stroke engine is maintained substantially equivalent to that of the existing engine by increasing the clearance volume at top dead center within the bore in relation to the increased combustion volume created by the crankshaft having a larger throw "T".

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