Patent ID: 6401683
Filing Date: 2002-06-11
Classification: F01B,F02B

Abstract:
An internal combustion engine including:a drive shaft; a crank including a crank pin; a piston mounted for reciprocation within a cylinder; a connecting rod extending between the piston and the crank pin; a first crank gear mounted on the crank; a first drive gear mounted on the drive shaft; a second crank gear mounted to the crank; and a second complementary drive gear mounted to the drive shaft; wherein the first crank gear and the first drive gear form a first gear pair; wherein the first gear pair is drivingly engaged for at least a first portion of a complete revolution of the drive shaft; wherein at least one of the first crank gear and the first drive gear of the first gear pair is non-elliptical, wherein reciprocation of the piston causes rotation of the drive shaft in a relationship determined by the respective profiles of the crank gear and the drive gear of the first gear pair; wherein the second crank gear and second drive gear form a second gear pair; wherein the second gear pair is drivingly engaged for at least a second complementary portion of a complete revolution of the drive shaft; and wherein at least one of the second crank gear and the second drive gear of the second gear pair is non-circular, wherein reciprocation of the piston causes rotation of the drive shaft in a relationship determined by the profiles of the crank gears and the drive gears of the respective first and second gear pairs.