RU2239711C2 - Four-stroke internal combustion engine with double-acting rocking piston - Google Patents

Abstract

FIELD: mechanical engineering; internal combustion engines with rocking working members.

SUBSTANCE: proposed engine with double-acting rocking piston has cylinder head arranged inside cylinder working space, housing with cooling jacket, piston with shaft provided with channels to deliver fuel-air mixture, gas distributing chamber, spool valves and impeller. According to invention, piston rocking angle is 280-320 degrees. Impeller provides intensive mixing of fuel-air mixture in gas distributing chamber.

EFFECT: reduced overall dimensions of engine, improved organization of working process.

2 dwg

Description

The invention relates to the field of engine engineering, in particular to internal combustion engines with a swinging working element.

Known internal combustion engine with a reciprocating motion of the piston (USSR copyright certificate No. 1462007). In the present invention, it is possible to improve the efficiency of a two-stroke engine by making better use of the volume of the working chamber and improving the quality of the purge.

A disadvantage of the known engine is that the engine operates in push-pull mode and is not a dual-action engine.

The task of the invention is to reduce the size of the engine and improve the organization of the work process.

The problem is achieved in that in a four-stroke internal combustion engine with a double-acting oscillating piston containing a cylinder head located inside the cylinder’s working volume, a housing with a cooling jacket, a piston with a shaft made with channels for supplying the fuel-air mixture, and also a gas distribution chamber , spool valves and impeller, according to the invention, the swing angle of the piston is 280-320 degrees.

The claimed invention is illustrated using the drawings.

Figure 1 presents the claimed engine.

In Fig.2 is a longitudinal section of the engine in Fig.1 for combustion chambers.

In Fig.3 - locking sleeve, position 28, in Fig.2.

Figure 4 is the same, a longitudinal section bB in figure 3.

The engine comprises a housing 1 with a water cooling jacket 2. Inside the housing 1, a swinging piston 3 is placed, made integral with the hub 4 and the hollow shaft 5. Inside the shaft 5, channels 6 and 7 are made, through which the air-fuel mixture is supplied into the working cavities 8 and 9 constituting together the cavity 10 of the cylinder. In the cavity 10 is placed the cylinder head 11, made in the form of an annular sector and equipped with a gas outlet pipe 12 and a spool valve 13 for exhaust gas. The head 11 and the piston 3, in order to seal the working cavities, are equipped with sealing plates 14 and 15, spring-loaded expanders 16 (not all expanders are shown on the drawing). The air-fuel mixture is ignited by spark plugs 17 and 18. The cylinder cavity 10 is isolated from the external environment by annular seals 19 located in the grooves of the end walls of the housing 1. The shaft is mounted on bearings 20 and 21.

A gas distribution chamber 22 is installed coaxially with the engine casing 1 and is located in the casing 23. A fuel-air mixture is supplied to the chamber 22, consisting of air purified by an air purifier 24 and mixed with fuel in a carburetor 25. The mixture is additionally mixed by an impeller 26 mounted on the shaft 5 , and along the path indicated by arrow B, it is fed into the working cavities 8 and 9 of the cylinder through a spool valve 27 provided with a locking sleeve 28. In the sleeve 28, holes 29 are made, through which the camera 22 is communicated through tverstiya in the housing 23 and the opening 30 of the shaft 5 with the working cavities 8 or 9. The locking sleeve 28 is driven blade 5.

The engine operates on the principle of a four-stroke double-acting engine, since two working cycles are simultaneously realized in the cylinder: one in the working cavity 8, the other in the working cavity 9.

The engine operates as follows. When the piston 3 moves clockwise from the right dead center (PMT) to the left dead center (LMT), for example, at an angle of 280-320 degrees, the air-fuel mixture from the gas distribution chamber B through the spool valve 24 enters the working cavity A. When this valve 24 is opened when the holes M, N and G coincide, respectively, in the housing 20, the sleeve 25 and the shaft 5. With the subsequent movement of the piston 3 from the LMT to the PMT in the cavity And the compression of the mixture received in it. At the same time, at the end of the intake stroke or at the beginning of compression, the locking sleeve 25 is rotated by the protrusion of the shaft 5 and overlaps the holes M, N and G, which remain closed for the next three cycles. When the piston 3 reaches the PMT, the mixture ignites from the spark of the spark plug 15, and the piston 3 begins to move to the LMT under the pressure of expanding gases. When the piston 3 moves from the LMT to the PMT, the working cavity A of the cylinder is cleaned of combustion products through the slide valve 11 and the exhaust pipe 10. At the end of the exhaust stroke, the openings M, N, and G open for a second cycle. In parallel, a similar working process is carried out in the working cavity B.

Claims (1)

A four-stroke internal combustion engine with a double-acting oscillating piston, comprising a cylinder head located inside the cylinder’s working volume, a housing with a cooling jacket, a piston with a shaft made with channels for supplying the air-fuel mixture, a gas distribution chamber, slide valves, an impeller, characterized in that that the swing angle of the piston is 280-320 °.

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