KR19980072680A - Sliding valve on engine - Google Patents

Abstract

The present invention relates to a slide valve of an engine. In the conventional intake valve, when the valve is opened, a tumble phenomenon occurs in which a mixer flowing through the combustion chamber is interfered with, so that volumetric efficiency of the mixer and air is reduced and fuel is reduced. There is a problem in that the combustion is not properly burned, resulting in incomplete combustion, exhaust gas which is the main cause of environmental pollution, and the output of the engine is lowered.

Accordingly, the present invention is a lifter on the lower surface of the drive cam 22 so that the lifter 24 can be moved up and down by the rotation of the drive cam 22 and the repulsive force of the return spring 26 as shown in FIGS. A guide groove (20) formed in the guide rail (18) formed in the cylinder head (32) and the square valve-shaped slide valve (10) is provided and provided to open and close the intake / exhaust port (14). It is coupled to the sliding movement, one end of the lifter 24 and the upper end of the slide valve 10 is hinge shaft 28 so that the lifter 24 can open and close the slide valve 10 up and down movement. Combined with the rotational link 30 reciprocating to the center, the above-mentioned problem is solved, the slide valve has an effect of increasing the cooling effect on the exhaust gas in the high temperature state, reducing the exhaust gas and improving the output of the engine .

Description

Sliding valve on engine

The present invention relates to a slide valve of the engine, and more particularly, to change the structure of the intake valve and the exhaust valve to facilitate the flow of the mixer to facilitate the inlet and exhaust of the mixer to increase the volumetric efficiency in the combustion chamber. It relates to a slide valve of the engine to improve the efficiency of the engine.

In general, the main body of the engine is a machine that generates power by converting thermal energy obtained from combustion of fuel into kinetic energy. Engines commonly used are divided into gasoline engine and diesel engine according to fuel, cylinder head, cylinder block, It is divided into three parts of the crankcase body, and its parts consist of stationary parts, motion parts and various accessories.

Here, the cylinder head, which is a stationary part, is equipped with an ignition plug in an intake valve, an exhaust valve, and a gasoline engine, and a fuel injection nozzle in a diesel engine. FIG. 1 is a combustion chamber 2 of an engine 1. A perspective view showing the structure of a double overhead camshaft engine that supplies fuel and discharges combustion gas.

The valve mechanism has an overhead valve type and an overhead camshaft type, of which the double camshaft type of the overhead camshaft is installed so that the camshafts 5 and 6 operate timing gears at 1/2 the speed of the crankshaft. , The opening and closing timing of each valve with respect to the rotation of the crankshaft must be exactly matched, and the driving cam 7 is attached to the intake cam shaft 5 and the exhaust cam shaft 6, respectively, so that the intake valve 3 and the exhaust valve 4 ) Is opened and closed.

In addition, the intake valve 3 is designed to receive less intake resistance, and the exhaust valve 4 is well cooled and has a high durability.

Therefore, the intake valve 3 and the exhaust valve 4 are opened by the drive cam 7 in a very short time while the piston is in one cycle, intake and exhaust are performed to increase the volumetric efficiency, and the two valves 3 In the compression stroke and power stroke, which are closed in (4), sufficient airtightness should be maintained, and even under difficult conditions such as being able to operate correctly even when exposed to high temperature of combustion gas, and enduring long time operation.

However, as described above, the conventional intake valve 3 has a gas flowing into the intake valve 3 by the mixer and air flowing back through the combustion chamber 2 as shown in FIG. 2 when the valve is opened. Because of the tumble phenomenon caused by interference, the volumetric efficiency of the mixer and air is reduced, and the fuel is not burned properly, resulting in incomplete combustion, which emits exhaust gas, which is the main cause of environmental pollution, and reduces the engine output. There was this.

In addition, the intake valve 3 and the exhaust valve 4 open and close the circular intake port and the exhaust port, the mixer is introduced into the combustion chamber and the exhausted exhaust gas is discharged. Gas behavior is limited by the head surfaces of the valves 3 and 4, and the inflow into the combustion chamber is not made smoothly.

Accordingly, the present invention has been made to solve the above problems of the prior art, by changing the structure of the intake valve and exhaust valve so that the inlet of the mixer and the exhaust of the exhaust gas into the combustion chamber of the engine smoothly flows into the combustion chamber SUMMARY OF THE INVENTION An object of the invention is to provide a slide valve of an engine that increases the volumetric efficiency of a mixer to improve the efficiency of the engine.

The present invention for realizing the above object is provided with a guide rail formed in the cylinder head to install the lifter so that the lifter can be moved up and down by the repulsive force of the rotation and the return spring of the drive cam, opening and closing the intake and exhaust ports; The guide groove formed on the square valve shaped slide valve is coupled to perform a sliding motion, and the lifter reciprocates the hinge shaft at one end of the lifter and the upper end of the slide valve to open and close the slide valve. Combined rotary link.

Therefore, in the present invention, the operation of the drive cam is a linear movement so that the slide valve can open and close the intake / exhaust ports through the rotational link, whereby the slide valve can increase the volumetric efficiency in the combustion chamber and lower the height of the cylinder head. In addition, the rectangular plate shape is to increase the cooling effect on the exhaust gas in the high temperature state, and eventually the output of the engine is increased and the exhaust gas can be cleaned.

1 is a perspective view showing the structure of an overhead camshaft valve of a conventional engine,

2 is an exemplary view showing a tumble flow which is a problem of a conventional overhead valve;

3 is a configuration diagram representing a slide valve according to the present invention,

Figure 4 (a) is a perspective view showing a slide valve according to the present invention, (b) is a cross-sectional view taken along line AA of FIG.

* Explanation of symbols for main parts of the drawings

10-slide valve, 11-pin,

12-outlet, 14-intake port, exhaust port,

16-oil supply hole, 18-guide rail,

20-guide groove, 22-drive cam,

24-lifter, 25-guide,

26-return spring, 28-hinge shaft,

30-rotary link, 32-cylinder head,

34-contact surface.

Hereinafter, the configuration and operation of the present invention will be described in detail with reference to the accompanying drawings.

In the present invention, the lifter 24 is installed on the lower surface of the drive cam 22 so that the lifter 24 can move up and down due to the rotation of the drive cam 22 and the repulsive force of the return spring 26. The guide rail 18 formed on the cylinder head 32 and the guide groove 20 formed on the square valve-shaped slide valve 10 to be opened and closed may be coupled to each other so as to be able to slide. One end of the lifter 24 and the upper end of the slide valve 10 is coupled to the rotating link 30 reciprocating around the hinge shaft 28 so that the up and down movement can open and close the slide valve 10. Valve of the engine.

Exemplary Drawings Figure 3 is a block diagram representing a slide valve according to the present invention.

In the slide valve of the present invention, a lifter 24 provided by a drive cam 22 and a return spring 26 providing a lift to a slide valve 10 is mounted on an upper end of a cylinder head 32. 24 has a guide protrusion 25 protrudes so that the return spring 26 can be guided in the downward direction of the cylinder head 32 in which the return spring 26 is installed, and one end of the lifter 24 is connected to the rotary link 30 to be described later. It is.

The rotary link 30 is a link connecting the vertical movement of the lifter 24 to operate in a linear motion of the slide valve 10, the upper end of the rotary link 30 is one end of the lifter 24 Is connected to the lower end of the lifter 24 is connected to the upper end of the slide valve 10 is to rotate a certain angle about the rotation axis (28).

In addition, the slide valve 10 is formed of a square plate as shown in (a) of Figure 4, the outlet 12 is formed above the central portion of the square plate, the upper end of the slide valve 10 is the rotation A pin 11 that can be connected to the lower end of the link 30 is attached, and both sides of the slide valve 10 are formed with guide grooves 20 having a V groove shape.

This slide valve 10 is mounted on the guide rail 18 formed in the cylinder head 32 as shown in (b) of Figure 4, the slide valve 10 is linear movement along the guide rail (18) In order to facilitate the reciprocating motion of the slide valve 10, the inner surface of the guide rail 18 has an oil supply groove 16 through which lubricating oil is supplied.

Hereinafter, the operation and expected effect of the slide valve 10 will be described.

When the lifter 24 is lowered by the rotation of the drive cam 22, the lifter 24 rotates at a certain angle to the hinge shaft 28, and the slide valve 10 is the intake / exhaust port for this rotation. 14 and the outlet 12 of the slide valve 10 coincide to move in a direction in which suction and exhaust can be made.

In addition, when the driving cam 22 is rotated and the lifter 24 is raised by the repulsive force of the return spring 26, the slide valve 10 interlocked with the rotation link 30 moves in the upper oblique direction to intake and exhaust. Port 14 is closed.

The slide valve of the engine having such a configuration is opened and closed from the side with respect to the intake / exhaust port 14 to supply the mixer to the combustion chamber of the engine and discharge the combusted exhaust gas to the outside.

Therefore, the slide valve of the present invention prevents the volumetric efficiency in the combustion chamber from being reduced due to the interference of the inflow gas, which has been a problem in the conventional valve structure, and the intake valve of the slide valve 10 has less intake resistance and an exhaust valve. The furnace is well cooled and has greatly improved durability.

As described above, the present invention is composed of a lifter operating up and down by the operation of the drive cam, and a rotational link and a square plate-shaped slide valve rotated at an angle by the operation of the lifter, and the operation of the drive cam slides through the rotational link. The valve moves linearly to open and close the intake / exhaust ports. As a result, the slide valve increases the volumetric efficiency in the combustion chamber and lowers the height of the cylinder head. The rectangular plate shape increases the cooling effect on the exhaust gas at high temperature. In the end, the output of the engine is increased and the exhaust gas is cleaned.

Claims (3)

The lifter 24 is installed on the lower surface of the drive cam 22 so that the lifter 24 can move up and down by the rotation of the drive cam 22 and the repulsive force of the return spring 26. The guide rails 18 formed on the cylinder head 32 and the guide grooves 20 formed on the square valve-shaped slide valve 10 are slidably coupled to each other so as to be able to open and close. One end of the lifter 24 and the upper end of the slide valve 10 is coupled to the rotary link 30 reciprocating around the hinge shaft 28 so that the up and down movement can open and close the slide valve 10. Sliding valve of the engine. 2. The slide valve of an engine according to claim 1, wherein an oil supply hole (16) is formed to supply lubricant to an inner surface of the guide rail (18) formed in the cylinder head (32). The contact surfaces 34 and 36 of the guide groove 20 and the guide rail 18 are formed so that the contact surfaces 34 on the combustion chamber side are wider than the contact surfaces 36 on the intake / exhaust port 14 side. Slide valve of the engine, characterized in that made.