F - Mech Eng,Light,Heat,Weapons – 02 – B
Patent
F - Mech Eng,Light,Heat,Weapons
02
B
171/30
F02B 75/22 (2006.01) F02B 75/06 (2006.01) F02B 75/02 (2006.01) F02B 75/18 (2006.01)
Patent
CA 1157381
ABSTRACT OF DISCLOSURE The two stroke engine includes a V engine block having first and second cylinder banks each with first, second, and third cylinders, which banks are located at a bank angle within the range of from about 60° to about 90°, a cylinder firing order wherein corresponding cylinders from alternate banks are successively fired, a cylinder firing interval constituted by a repetitious cycle of crankshaft angles between firings including a first firing interval angle followed by a second firing interval angle, wherein the sum of the first and second firing interval angles equals about 120°, and a crankshaft having first, second, and third crankpins respectively associated with the first, second and third cylinders of both of the banks, each of the crankpins being spaced from each other at an angle of about 120° and each of the crankpins including a first portion associated with one of the cylinders in the first bank and a second portion associated with one of the cylinders in the second bank and located in axially adjacent relation to the first portion at a splay angle from the first portion, which splay angle is approximately equal to the absolute value of the difference between the first firing interval angle and the bank angle.
374226
Outboard Marine Corporation
Smart & Biggar
LandOfFree
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