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US 2011/0030651 A1Published application
Dual crankshaft internal combustion engine
OwnerArthur E. Dalkeinventor
Life of this patent
Estimating the term…
Abstract
A dual crankshaft internal combustion engine having two rotating offset crankshafts respectively attached to connecting rods. Each of the connecting rods, in turn, are pivotally attached to piston rods, which are located an equidistance between the crankshafts. The piston rods are attached to a piston reciprocally disposed in a cylinder. The crankshafts are aligned in parallel and are geared together, either directly or indirectly, thus causing the crankshafts to rotate in the same or opposite directions, depending upon the linkage gear configuration. The dual crankshaft internal combustion engine utilizes leverage from the wedge-effect of the offset crankshafts to provide increased torque, power duration and fuel efficiency.
Claims22
A dual crankshaft internal combustion engine, comprising:
- a first crankshaft and a second crankshaft in a spaced relation and having parallel rotary axes, said first crankshaft and said second crankshaft each having a spur gear for rotation about said rotary axis of said crankshaft, said spur gears of said first crankshaft and said second crankshaft having the same diameter and the same number of teeth, causing said first crankshaft and said second crankshaft to rotate at the same speed and in the same or opposite directions;
- at least one linkage gear disposed intermediate of said first crankshaft and said second crankshaft, said linkage gear engaged with said spur gear of said first crankshaft and said spur gear of said second crankshaft;
- at least one cylinder having a head at an upper end and a crank case at a lower end;
- at least one piston within said cylinder, said piston cyclically reciprocates within said cylinder between a top dead center position and a bottom dead center position, said first crankshaft and said second crankshaft being vertically offset from said piston;
- and
- a first connecting rod and a second connecting rod pivotally attached to a first piston rod and a second piston rod via a connecting rod pin, said first piston rod and said second piston rod connected to said piston via a piston pin, said first piston rod and said second piston rod located an equidistance between said first crankshaft and said second crankshaft.
3 more elements
A dual, unidirectional rotating crankshaft internal combustion engine, comprising:
- a first crankshaft and a second crankshaft in a spaced relation and having parallel rotary axes, said first crankshaft and said second crankshaft each having a spur gear for rotation about said rotary axis of said crankshaft, said spur gear of said first crankshaft and said second crankshaft having an equal diameter and an equal number of teeth, causing said first crankshaft and said second crankshaft to rotate at equal speeds and in a same direction;
- an odd number of linkage gears disposed intermediate of said first crankshaft and said second crankshaft, said linkage gears engaged with said spur gear of said first crankshaft and said spur gear of said second crankshaft;
- at least one cylinder having a head at an upper end and a crank case at a lower end;
- at least one piston within said cylinder, said piston cyclically reciprocates within said cylinder between a top dead center position and a bottom dead center position, said first crankshaft and said second crankshaft being vertically offset from said piston;
- and
- a first connecting rod and a second connecting rod pivotally attached to a piston rod via a connecting rod pin, said piston rod connected to said piston via a piston pin, said piston rod located an equidistance between said first crankshaft and said second crankshaft.
3 more elements
A dual, counter-rotating crankshaft internal combustion engine, comprising:
- a first crankshaft and a second crankshaft in a spaced relation and having parallel rotary axes, said first crankshaft and said second crankshaft each having a spur gear for rotation about said rotary axis of said crankshaft, said spur gears of said first crankshaft and said second crankshaft having an equal diameter and an equal number of teeth, causing said first crankshaft and said second crankshaft to rotate at an equal speed and in opposite directions;
- an even number of linkage gears disposed intermediate of said first crankshaft and said second crankshaft, said linkage gears engaged with said spur gear of said first crankshaft and said spur gear of said second crankshaft, said linkage gears comprising an output shaft and a power shaft intermediate of said first crankshaft and said second crankshaft, said output shaft and said power shaft being geared together and geared with said first crankshaft and said second crankshaft, such that the rotational motion of said first crankshaft and said second crankshaft is transferred to said output shaft and said power shaft;
- at least one cylinder having a head at an upper end and a crank case at a lower end;
- at least one piston within said cylinder, said piston cyclically reciprocates within said cylinder between a top dead center position and a bottom dead center position, said first crankshaft and said second crankshaft being vertically offset from said piston;
- and
- a first connecting rod and a second connecting rod pivotally attached to a piston rod via a connecting rod pin, said piston rod connected to said piston via a piston pin, said piston rod located an equidistance between said first crankshaft and said second crankshaft;
- wherein a power stroke of said dual crankshaft internal combustion engine is approximately 215 degrees.
4 more elements
Dependencies are inferred from the claim text.