Internal-combustion engines – Igniters
Patent
1990-12-28
1992-10-20
Okonsky, David A.
Internal-combustion engines
Igniters
1231936, F02P 2300
Patent
active
051566850
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This invention relates to a device which promotes firing in internal combustion engines. More specifically, it relates to a device which promotes firing in the cylinders of internal combustion engines such as gasoline and diesel engines.
There are known devices which promote firing in internal combustion engines by providing an orifice system which intakes a uniform previously mixed fuel and air mixture through openings in an inside wall of a cylinder. Swirl is thereby produced during the intake stroke. However, the opening and closing mechanism is complicated an consequently an effective swirl is not obtained before firing has begun.
This invention provides a comparatively simple device which promotes firing to produce swirl at the beginning of firing in the combustion chamber of an internal combustion engine.
SUMMARY OF THE INVENTION
The present invention is a combustion promoter for an internal combustion engine which comprises a cylinder having a combustion chamber therein, a main piston movable within the cylinder, a sub-piston mounted on an inner wall of the main piston, and a sub-cylinder surrounding a projecting portion of the sub-piston and defining a sub-cylinder chamber. The sub-piston is driven in relation to the stroke of the main piston toward the combustion chamber until the main piston has reached a position in the vicinity of top dead center of the compression stroke. Gas in the combustion chamber is then introduced into the sub-cylinder chamber where it is stored. The sub-piston is next moved rapidly away from the combustion chamber to eject the gas stored in the sub-cylinder chamber into the combustion chamber, thereby promoting combustion of the gas.
Ejection of the gas stored in the sub-cylinder chamber causes a swirl to occur in the gas which has just started combustion. Consequently, firing effects are improved remarkably.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a sectional view showing a first embodiment of a cylinder of an internal combustion engine constructed in accordance with this invention;
FIG. 2 is a top view of the pistons incorporated in the engine of FIG. 1; and
FIG. 3 is a sectional view showing a second embodiment of the invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT
FIG. 1 shows a first embodiment of my invention wherein 1 is a cylinder wall, 2 is a cylinder head, 3 is a cylinder chamber, 4 is a combustion chamber, 5 is a main piston, 6 is a gas saving blasting device, 7 is a sub-piston of the gas saving blasting device 6, 8 is a piston rod of the sub-piston 7, 9 is a piston rod guide for the sub-piston 7, 10 is an oil damper, 10' is a small hole in the bottom part of the oil damper, 11 is a spring plate, 12 is a support for the spring plate, 13 is a sub-cylinder wall of the blasting device 6, 6' is a sub-cylinder chamber defined by the sub-piston 7 and the sub-cylinder wall 13, 14 is a clearance between the sub-piston 7 and the sub-cylinder wall 13, 14' (FIG. 2) is a plurality of small holes in a face 20 of the sub-piston 7, 15 is a connecting rod, 16 is a piston pin, 17 is a piston pin holder of the connecting rod, 18 is a cam, 19 is the back face of the cam 18, 21 is a back face of the sub-piston 7, 23 is an oil damper compression chamber, 24 is a spherical face of the sub-piston rod 8, 25 is a spring interposed between the inside upper wall of the main piston 5 and the head of the sub-piston rod 8, 26 is a cavity within the sub-piston rod, 27 is an inlet valve of the combustion chamber 4, 28 is an exhaust valve of the combustion chamber 4, 29 is an intake opening, and 30 is an exhaust opening.
The embodiment of my invention shown in FIGS. 1 and 2 operates as follows. When the main piston 5 reaches a position in the vicinity of top dead center of the compression stroke, the cam 18 mounted on the piston pin holder 17 and which is synchronized with the stroke of the main piston, pushes the head 24 of the sub-piston rod 8 in the upward direction, via the spring plate 11, against the force exerted by spring 25. This causes t
REFERENCES:
patent: 973651 (1910-10-01), Haberkorn
patent: 1515562 (1924-11-01), Enssle
patent: 1860673 (1932-05-01), Jackson
patent: 2222440 (1940-11-01), Nawman
patent: 2394269 (1946-02-01), Svete
patent: 3038458 (1962-06-01), Mansfield
patent: 4610226 (1986-09-01), Okuma
patent: 4617887 (1986-10-01), Nagase et al.
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