JPH03213625A - Reciprocating internal combustion engine - Google Patents

Abstract

PURPOSE:To simplify the structure and to reduce the weight and the rotational vibration by cutting off the top and the bottom of a spherical body, and fixing a connecting rod to the remaining center part. CONSTITUTION:The top and the bottom of a spherical body are cut off, a connecting rod 2 is fixed to the remaining center part to form a piston 1, and the piston 1 is inserted to a cylinder which has an outward form in a plane figure fitting to that of the piston 1, so as to compose a reciprocating internal combustion engine. In this case, gas seals 4 and 4 for airtightness divided into the left and the right pieces are installed to cover the peripheral surface of the piston 1, both gas seals 4 and 4 are enforced to the outer sides to squeeze to the inner wall of the cylinder, by springs 5 placed between the both seals 4 and 4, and high airtightness is secured.

Description

[Detailed description of the invention] (1) Industrial application fields The present invention relates to a cash register internal combustion engine.

(2) Prior Art The piston of a conventional internal combustion engine of a cash register is cylindrical and has a certain height, and the connecting rod is connected through a piston pin.

Also, in two-stroke engines, the height of the piston is used as a valve for exhaust and scavenging air. However, with this method, the timing of opening and closing of the exhaust and scavenging ports is symmetrical with respect to the bottom dead center of the piston, so fresh air blows through to the exhaust port, resulting in poor fuel efficiency and shortening the piston's effective compression stroke, which inhibits output. are doing. There is a way to control the exhaust by attaching a suitable valve to the exhaust port, but the structure is complicated.

Furthermore, the scavenging air duct must cross the height of the piston from the precompression chamber to the combustion chamber, making it long and reducing scavenging efficiency.

(3) Problems to be solved by the invention By reducing the weight of the piston and eliminating the piston bin, vibrations caused by rotation are reduced and the engine block is made more compact.

Furthermore, it seeks to address the scavenging and effective compression deficiencies associated with two-stroke engines.

(4) Means for solving the problem FIG. 1 is a perspective view of the present invention, in which (1) is a piston, (2)
is the connecting rod, and (1) and (2) are fixed to each other. The peripheral surface (3) of the piston (1) is part of a spherical surface. The spherical surface of the part that does not contact the inner wall of the cylinder is not necessary, and the upper and lower parts of the piston are cut away.

FIG. 2 is a perspective view of an airtight gas seal (4) attached to cover the peripheral surface of the piston shown in FIG. The edges are bent inward to prevent it from coming off the piston when installed. Furthermore, the spring (5) allows these two gases to
The seals are pushed in opposite directions and pressed against the inner wall of the cylinder.

Of course, if the piston and cylinder could be made from materials that do not undergo thermal distortion, this gas seal would be unnecessary.

FIG. 3 is a side sectional view of the present invention in which this reciprocating portion is housed within a cylindrical cylinder.

Fig. 4 is a perspective view of the two-stroke piston (6) and connecting rod (7). What differs from Fig. 1 is that both sides of the piston are cut out in parallel (8). This is to ensure that the disc-shaped rotary valve for scavenging air is in close contact with the valve.

FIG. 5 is a plan view of this piston.

FIG. 6 is a front view of this piston and connecting rod.

FIG. 7 is a side view of FIG. 6.

FIG. 8 is a perspective view of a gas seal installed over the spherical part and parallel part (8) of the piston.

FIG. 9 is a side sectional view of a two-stroke engine with this piston and connecting rod installed in the cylinder.

FIG. 10 is a front sectional view of FIG. 9. The piston is at top dead center, and the exhaust valve (9) and scavenging valve (10)
are both closed. (11) is a flywheel.

In this embodiment, a notch (12) is provided in a part of the flywheel near the crank, a slit is opened in the housing (13) halfway around the flywheel, and the inhaler (14) is placed so as to cover it. Although the flywheel is used as an intake valve, the intake system may be any other conventional system, such as a reed valve system.

Figure 11 shows a disc-shaped rotary valve for exhaust.

A part has a notch (15) or a window.

The same method is used for the scavenging valve.

FIG. 12 is a front sectional view with the piston at the bottom dead center. Both the exhaust port (16) and the scavenging port (17) are open.

FIG. 13 is a plan view taken along the line A-A'' in FIG. 12.

(5) Operation The piston reciprocates while rocking in response to the rotation of the crank.

In a two-stroke engine, when the piston approaches bottom dead center, the notch in the exhaust valve attached to the flywheel passes through the exhaust port, opening the exhaust valve6.
Next, the scavenging valve opens, and the fresh air compressed in the precompression chamber is blown into the combustion chamber to scavenge air.The piston reaches bottom dead center, and then both the exhaust valve and the scavenging valve close. Set the timing for closing the exhaust valve to prevent fresh air from escaping through the exhaust port. This also ensures maximum effective compression stroke of the piston.

The wasted space in the precompression chamber can be reduced as much as possible compared to conventional two-stroke engines, and the compression ratio of the precompression chamber can be increased. (This is because there is no need to open the inside of the piston, the connecting rod can be made thinner and wider, and the scavenging duct (17) is short.) If the pressure in the prepressure chamber is high, the scavenging pressure is high and scavenging can be done in a short time. However, since almost all of the fresh air in the precompression chamber can be transferred to the combustion chamber, scavenging efficiency is also good.

(5) Effects of the invention Since the structure of the reciprocating part is simple, small, and lightweight, the engine block is more compact than a conventional engine of the same displacement. Rotational vibration can also be reduced.

(7) Effects of the invention Since the piston and connecting rod can be integrated, the structure is simple, small, and lightweight, the engine block can be made compact and rotational vibration can be reduced.

Since the two-stroke exhaust and scavenging control timing can be freely set, and the scavenging pressure is high, it is possible to improve the poor fuel efficiency, which was the biggest drawback of conventional two-stroke engines, and to increase the output.

[Brief explanation of drawings]

Figure 1 shows the piston (1) and connecting rod (
2) is a perspective view of the integrated reciprocating portion. (3) is the peripheral surface of the piston that forms part of the spherical surface. Figure 2 is a perspective view of the gas seal (4) and spring (5). FIG. 3 is a side sectional view of an internal combustion engine equipped with the present invention. FIG. 4 is a perspective view of a reciprocating portion for a two-stroke engine. FIG. 5 is a plan view of a piston for a two-stroke engine. FIG. 6 is a side view of the reciprocating portion. FIG. 7 is a front view of the reciprocating portion. FIG. 8 is a perspective view of the gas seal. FIG. 9 is a side sectional view of the present invention. FIG. 10 is a front sectional view of the present invention. (9) is an exhaust valve, (10) is a scavenging valve, (11) is a flywheel,
(12) is the notch of the suction valve, (13) is the housing, and (14) is the suction machine. FIG. 11 is a structural diagram of a disc-shaped rotary exhaust valve. (1
5) is the notch. FIG. 12 is a front sectional view with the piston at the bottom dead center. (16) is an exhaust port, and (17) is a scavenging port. FIG. 13 is a sectional view taken along the line AA' in FIG. 12. (18) is the inlet.

Claims (1)

[Claims] 1. A register-pro internal combustion engine having a piston in which the top and bottom of a sphere are removed and a connecting rod is fixed to the remaining central portion. 2. Cut out the top and bottom of the sphere, and fix the connecting rod to a piston that has been cut out in parallel to both sides of the remaining central part, so that the piston's plan outline matches that of the piston. The exhaust and scavenging air are controlled by a disc-shaped rotary valve that fits into the cylinder, has an exhaust port and a scavenging air port on part of the parallel facing planes of the inner wall of the cylinder, and has a notch or window attached to both ends of the flywheel. A 2-stroke engine that performs