Four-cycle internal combustion engine

Details Four-cycle internal combustion engine Four-cycle internal combustion engine

1999-12-07

2002-06-25

Argenbright, Tony M. (Department: 3747)

Internal-combustion engines

Transmission mechanism from piston

Crankshaft and connecting rod

C123S0780AA, C123S0780AA

Reexamination Certificate

active

06408814

ABSTRACT:

FIELD OF THE INVENTION
This invention relates to four-cycle internal combustion engines.
BACK GROUND OF THE INVENTION
The admission stroke and the explosion stroke of conventional four-cycle internal combustion engines are the same, due to the construction of the engines, and at the end of the explosion stroke, the engines exhaust combusion gases, which still have considerable energy of compression, as exhaust gases to the atomosphere.
SUMMARY OF THE INVENTION
An object of the present invetion is to provide a four-cycle internal combustion engine the explosion stroke of which is longer than the admission stroke.
Another object of the invention is to provide a four-cycle internal combustion engine capable of utilizing compression energy of exhaust gases so that the efficiency of the engine may be increased, while cleaning exhaust gases.
To accomplish these purposes, this invention provides a four-cycle internal combustion engine having a piston
70
reciprocably movable within a cylinder
80
, a crankshaft
10
, a rod
60
connecting the piston
70
to the crankshaft
10
and means arranged between the rod
60
and the crankshaft
10
to vary the stroke of the piston
70
, said means for varying the stroke comprising an internal gear
20
fixed on the frame
90
of the engine, an external gear
30
engaged with the internal gear
20
as rotatably supported on the crankpin
12
of the crankshaft
10
an eccentric member fixed eccentrically to the crankpin
12
on the external gear
30
, characterized in that the eccentric distance of the crankpin
12
, the radius of the pitch circle of the external gear
30
and the radius of the pitch circle of the internal gear
20
are in the ratio of one to two to three.


REFERENCES:
patent: 4152955 (1979-05-01), McWhorter
patent: 5170757 (1992-12-01), Gamache
patent: 5425334 (1995-06-01), Yonehara
patent: 5908014 (1999-06-01), Leithinger
patent: 5927236 (1999-07-01), Gonzalez

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