JPS5847110A - Suction and exhaust port closing device for internal combustion engine with use of rotary disc - Google Patents

Abstract

PURPOSE:To simplify the mechanisms of suction and exhaust devices and contrive compact shaping and high output yield in such a way that suction and exgaust ports in an internal combustion engine are opened and closed by turning a disc which has an arciform long hole at one part. CONSTITUTION:When a disc 1 of a rotary disc type suction and exhaust port closing device is turned clockwise, and a port 4 comes to a suction port 8, a piston 13 is at the top dead point. When the port 8 is opened by the port 4, and an exhaust port 9 which has been opened is closed practically at the same time by the disc 1, the piston 13 comes into its suction stroke. When the piston 13 arrives at the bottom dead point, the port 8 is closed by the disc 1, the piston 13 comes into its compression stroke, the disc 1 is turned by one fourth, and when the piston arrives at the top dead point, it comes into its explosion stroke. The disc 1 is turned by one fourth before the piston 13 arrives at the bottom dead point, the port 4 comes to the port 9, and at the same time as the piston 13 almost arrives arrives at the bottom dead point, the port 9 is opened by the port 4, which results in exhaust stroke, and these strokes cyclically repeat likewise hereafter.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for smoothly operating an internal combustion engine by rotating a disc having long groove arc-shaped holes in the intake and exhaust holes of an internal combustion engine. It is something.

To give a brief overview, the mainstream valve devices (=intake/exhaust hole opening/closing devices) for conventional four-stroke reciprocating engines have the following structure. There is one hole at the top of the cylinder for intake and one for exhaust, and a small umbrella-shaped valve with a long handle is passed through the hole, and a cam pushes down on the tip of the handle to open it and close it using the force of a spring. This is how it works.

However, this has a very complicated structure, so when automakers try to make inexpensive reciprocating engines, they tend to choose two-stroke engines that do not require a valve device.

Furthermore, in conventional valves, the valve opens and closes by reciprocating motion, so if the frequency of this reciprocating motion increases beyond a certain point, the inertia of the valve mouth body causes the valve to open and close before being pushed back by the spring. The next cycle comes and the valve will not close.

In other words, even if the engine speed is increased above this limit, no improvement in output can be expected, and this may lead to damage to the valve device.

Automobile manufacturers are trying to reduce the inertia of individual valves by increasing the number of valves per cylinder, so that the above-mentioned malfunction does not occur even at high rotational speeds, but this is not the case. Even if it is not, the complicated valve device becomes even more complicated, requires high technology to manufacture, and costs are inevitably high.

Furthermore, engines with conventional valve devices have correspondingly increased weight, making it difficult to reduce their weight.

The present invention was invented in order to eliminate these drawbacks, improve the output per heavy load of the engine, and make the engine smaller and higher in output.

The configuration of the embodiment will be explained in detail below with reference to the drawings showing the embodiment. FIG. 1 is a longitudinal cross-sectional view of the embodiment, and FIG. 2 is a cross-sectional view thereof.

(a) The disk (1) is made of a durable material that is resistant to heat and extremely unlikely to wear out.

(b) A bearing (2) is attached to the center of the disc (1) so that it can be rotated with extremely little resistance.

(c) A gear (3) is provided around the disc (1).

2) In the disk (1), a long groove arc-shaped hole (4) is drilled on the concentric circle, the length being one quarter of the circumference of the concentric circle (7).

(e) The disc (1) made as described above is attached to the top of the engine cylinder (5) using the bearing (2) mentioned above so that it can rotate freely.

(v) The disc (1) is fixed to the cylinder top (5) via a bearing so as to rotate, but the protrusion (1) is along the concentric circle (7) on the lower surface of the cylinder top (5). Thirst and
are in contact with each other without any gaps.

(g) Also, the driving gear (6) of the disc (1) made to mesh with the disc (1) is meshed with the gear (3) attached to the disc (1) at the top of the cylinder (5). It's an obsession.

(h) The driving gear (6) rotates the disc (1) once every two revolutions of the engine crankshaft.
It is linked to the crank.

(1 sword) The top of the cylinder (5) overlaps the concentric circle (7) and divides this concentric circle (7) into quarters, as shown in Figure 2, at an approximately 90° open position +81 .+91,
Drill two holes.

(J) The top of the cylinder (5) is not provided with any openable/closable holes other than (8) f91, and the top of the cylinder is tightly fixed to the cylinder (10).

(Nori) Also, there is a plug (
11) is installed.

Next, the operation of the apparatus configured as above will be explained.

When the disc (1) rotates from the hole (9) to the hole (8) (clockwise in the figure), the hole (8) becomes an intake hole and the hole (9) becomes an exhaust hole. When the hole (4) approaches the hole (8), the piston (13) is at the top dead center. When the hole (8) is opened by the hole (4) and the hole (9+) opened by the hole (4) is closed by the disk (1) almost at the same time, the piston (13) starts to move downward and begins the intake stroke. enter.

When the piston (131) reaches the bottom dead center, the hole (4)
8), the hole (8i) is closed by the disk (1). The piston (13) begins to rise from the bottom dead center and enters the compression stroke of the air-fuel mixture.

During this period, the disk (1) rotates by a quarter, and when the compression ends and the piston (13) reaches the top dead center, the last point in the direction of rotation of the hole (4) is ) and the center of the disk (1), on the diameter that they overlap.

After this, the piston (13) begins to descend due to the explosion. By the time the piston reaches the bottom dead center, the disc (1) has made a quarter turn and the hole (4) is in the hole (9), and the hole is closed almost at the same time as the piston (13) reaches the bottom dead center. (9) is opened by hole (4) and becomes the exhaust stroke. This is repeated below.

By adopting the above structure, first, the valve device itself can be simplified. The intake/exhaust hole opening/closing device of the present invention is significantly simplified compared to conventional valve devices.

Therefore, the manufacturing cost can be kept low. In addition, the number of parts is small, and the valve device is now housed inside the cylinder, rather than being attached to the top of the cylinder and sealed separately from the cylinder, which was the case in the past, which significantly reduces the weight of the engine. Make it happen. This brings about the effect of saving fuel consumption, which is an important issue these days.

In addition, in the present invention, unlike conventional valve devices that have reciprocating motion, there is no reciprocating part at all, and the device rotates to function as a valve.

Therefore, even if the engine speed increases, the engine speed will not reach a plateau due to the above-mentioned malfunction of the valve as in the past, and the engine will be operated at the speed that maximizes combustion efficiency. be able to.

In addition, since the rotation speed can be increased, the engine output is higher than before, and an engine with a smaller displacement than before can output the same output as a conventional engine with a larger displacement value.

Therefore, by using the present invention, the engine can be made smaller and lighter with the same output, and fuel consumption can be saved.

In addition, unlike conventional valves that block the passage of gas during intake and exhaust, there are no obstacles during intake and exhaust, so the intake and exhaust efficiency is far higher than conventional valves. be.

Furthermore, since the engine noise generated at high rotation speeds is higher than that of conventional engines, its frequency is high, making it easier to control the sound to reduce it.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of an embodiment of the present invention. FIG. 2 is a cross-sectional view of an embodiment of the present invention. The hole 5 is the cylinder top 6, the gear 7 is the concentric circle 8, the hole 9 is the hole 10, the cylinder 11 is the spark plug 12, the protrusion 13 is the piston

Claims (1)

[Claims] In a 4-cycle engine, a disk having a gear on its outer periphery is rotatably provided on the lower surface of the top of the cylinder of the engine, and the gear is connected to a gear that is interlocked with the crankshaft. Two through holes are provided at an angle of approximately 90° on the top of the engine cylinder, and approximately 90° are provided at positions corresponding to the through holes in the disc.
1. An intake/exhaust hole opening/closing device for an internal combustion engine using a rotary plate, characterized in that a hole is provided in the shape of a circular arc with a long groove, and a spark plug is exposed to the center of rotation of the disk.