Internal-combustion engines – Two-cycle – Whirl through piston-controlled ports
Patent
1996-11-18
1999-04-20
Okonsky, David A.
Internal-combustion engines
Two-cycle
Whirl through piston-controlled ports
123 65P, 123 74AC, F02B 7502
Patent
active
058948210
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention concerns an air valve system combined with a distribution chamber used as a seat for the valves. It concerns also a chamber able to be in the housing or the cylinder or between the two. It finally concerns an internal combustion engine, specifically of the "two-stroke" type, equipped with an entrance port device controlled by a new valve system.
BACKGROUND OF THE INVENTION
The invention can be used for internal combustion engines and specifically "two-stroke" engines.
SUMMARY OF THE INVENTION
The object of the invention is to improve the filling of cylinders. It also seeks to provide filling of greater than 1 by means of a double suction during each cycle.
So as to achieve this aim, according to one characteristic of the invention, the valves are placed very close to ports (or openings).
In the prior art, modern "two-stroke" engines are equipped with a valve chamber mounted in the engine crankcase or housing.
These valves are reed type valves. They are secured to a housing so as to facilitate machining of the seats, imperviousness and mounting. Only one side of their opening is limited by a stop plate.
This disposition of the valves in the housing results in said valves means that they are located some distance away from the transfer ports and open into a large volume which forms a buffer and eliminates the sensitivity of the valves. This renders it difficult for the gases to enter the valve chamber.
The invention seeks to overcome these drawbacks of the prior art. In fact, it concerns a valve system for an internal combustion engine entrance device. The invention is specifically characterized in that each valve comprises a housing to receive the end of a return spring, said housing being placed on the rear face of a closing plate, said plate being shaped and disposed so as to produce the largest possible entrance surface and in that the valve is mounted on a cylindrical surface common to the valves of the valves system which is used as a seat for said valves, and in that the top of the housing 3 is used as a opening stop for the valve.
The invention also concerns an internal combustion engine chamber disposed in the crankcase, in the cylinder, or between these two elements, and which receives a valve system disposed on the orifices.
Finally, the invention concerns an internal combustion engine, specifically of the "two-stroke" ignition type. The invention is characterized in that the engine comprises a valve system disposed on a distribution chamber, said valves being placed as described previously, entrance ports and transfer ports opening into the same chamber.
BRIEF DESCRIPTION OF THE DRAWINGS
Other advantages and characteristics of the invention shall be more readily understood from a reading of the description and drawings represented as follows:
FIGS. 1 to 3: three views of a valve of a system of the invention;
FIG. 4: a partial view of an annular chamber used as a seat for the valve system of the invention;
FIG. 5: a partial sectional view of a "two-stroke" ignition engine of the invention;
FIG. 6 is a vertical sectional view of a variant of the cylinder of the engine of FIG. 5; and
FIG. 7 is an end partial view of the vanes fitted in the wall of the cylinder of FIG. 6.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
According to one characteristic of the invention, the valves are disposed on a circumference. FIG. 4 shows only one valve with its housing 21 for receiving the extremity of the return spring (not shown), two ribs 22 and 23 fastened to a closing plate 25 in the orifice 26 of the internal circumference 27 pierced on cylindrical plate common to the valves of the valve system and in this instance formed by the annular distribution chamber shown as a half-size view. A total number of eight valves have been provided (including one valve and four orifices shown on FIG. 4). The top portion of the housing 21 is used as an opening stop for the valve. The valves are positioned and guided by: housing of the valve spring and the positionin
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patent: 1972589 (1934-09-01), Henter
patent: 1992328 (1935-02-01), Schaer
patent: 2206332 (1940-07-01), Radelet et al.
patent: 2620125 (1952-12-01), Kilchenmann
patent: 2704056 (1955-03-01), Petersen
patent: 5158046 (1992-10-01), Rucker
Drucker William A.
Okonsky David A.
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