KR19980068836A - Intake / exhaust valve of vehicle engine - Google Patents

Abstract

The present invention relates to a common intake / exhaust valve of a vehicle engine. In the related art, noise is generated by collision between a valve face and an intake and exhaust port when driving an intake and exhaust valve, and a valve and a piston collide with each other during a valve reciprocating motion. There was a problem that the performance of the combustion chamber was increased due to the failure of the scissors angle to decrease.

The present invention is installed in the cylinder head by unifying the existing intake and exhaust cam shaft and the intake and exhaust valve as one cam shaft (intake and exhaust air cam shaft 12) and the valve (intake and exhaust valve 16) as shown in Figure 3 to 5, Bevel gears 14 and 14 'are engaged with each other at positions where the intake and exhaust air camshaft 12 and the intake and exhaust air valve 16 cross each other, and the intake and exhaust air valve 16 is provided with an intake port 20 and an exhaust port ( 22 is installed at the boundary line, and the groove 18 is formed at one side of the intake and exhaust air valve 16 so that the groove 18 faces the intake port 20 in the suction stroke, and the groove (in the compression and explosion stroke). 18 is not directed to either the intake port 20 or the exhaust port 22, and the groove 18 is made to face the exhaust port 22 in the exhaust stroke.

Therefore, the present invention can increase the combustion efficiency by reducing the surface of the combustion chamber, there is an effect that can reduce the overall joint of the engine by removing the valve face.

Description

Intake / exhaust valve of vehicle engine

The present invention relates to an intake / exhaust valve for a vehicle engine, and more particularly, to an intake / exhaust valve for a vehicle engine to remove the joint by removing the valve face and to increase the combustion efficiency by reducing the surface of the combustion chamber.

Normally, the engine main body is a machine that generates power by converting thermal energy generated from combustion of fuel into kinetic energy. The engine commonly used is 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 intake valve, an exhaust valve, and a spark plug in a gasoline engine, and a fuel injection nozzle in a diesel engine. FIG. 1 is a combustion chamber 2 of an engine 1. Exemplary diagram representing a camshaft valve that supplies fuel to the inside and discharges combustion gas.

The camshafts 5 and 6 of the general four-stroke cycle are provided with timing gears 1/2 of the number of revolutions of the crankshaft, so that the timing of opening and closing each valve with respect to the rotation of the crankshaft must be precisely matched. A cam 7 is attached to the exhaust camshaft 6 to open and close the intake valve 3 and the exhaust valve 4 connected thereto.

In addition, the intake valve (3) is designed to receive less intake resistance, the exhaust valve (4) should be designed to be well cooled and durable.

Therefore, the intake valve 3 and the exhaust valve 4 are easily intake and exhaust in a very short time while the piston is in one cycle to increase the volumetric efficiency, and the compression stroke in which the two valves 3 and 4 are closed; Power strokes must maintain sufficient air tightness, operate correctly even when exposed to high temperatures of the combustion gases, and are molded to withstand long periods of operation.

However, conventionally, noise is generated by collision between the valve face 8 and the intake and exhaust ports when the intake valve 3 and the exhaust valve 4 are driven, and the valves 3 and 4 collide with the piston during the valve reciprocating motion. Since it is expected that the scissors angle of the valve could not be reduced, the combustion chamber surface was increased, there was a problem that the performance is reduced.

Accordingly, the present invention has been made to improve the problems of the conventional engine described above, to provide a joint valve for the intake and exhaust of a vehicle engine to remove the joint by removing the valve face and increase the combustion efficiency by reducing the surface of the combustion chamber. There is an object of the invention.

The present invention for realizing the above object is installed in the cylinder head by unifying the existing intake camshaft and exhaust camshaft and the intake valve and the exhaust valve into a single camshaft (intake and exhaust valve) and valve (intake and exhaust valve). The common camshaft and the intake / exhaust air valve are formed by bevel gears to be engaged with each other.

In addition, a groove is formed at one side of the intake / exhaust air valve so that the groove is placed as an intake port in the engine intake stroke, and fuel is sucked into the combustion chamber along the groove, and in the compression and explosion stroke, the groove is directed to either the intake port or the exhaust port. In addition, in the exhaust stroke, the groove is placed in the exhaust port and burned so that the exhaust gas is discharged along the groove to the exhaust port.

Therefore, the present invention can remove the joint by removing the valve face, increase the combustion efficiency by reducing the surface of the upper end of the combustion chamber, it is possible to reduce the production cost by reducing the number of parts.

1 is an exemplary diagram representing an overhead camshaft valve of a conventional engine;

2 is a cross-sectional view showing a portion of a conventional overhead camshaft engine cut away;

3 is an exemplary diagram representing an intake and exhaust common valve according to the present invention;

Figure 4 (a) is an exemplary view showing a state in which the groove of the intake and exhaust common valve according to the present invention is located in the intake port,

(B) is an exemplary view showing a state where the groove of the intake and exhaust common valve is located in the exhaust port,

Figure 5 is an exemplary view showing a state in which the groove of the intake and exhaust common valve according to the present invention in a neutral state.

-Explanation of symbols for the main parts of the drawings-

10-cylinder head, 12-intake and exhaust camshaft,

14, 14 '-Bevel gear, 16-Intake / exhaust valve

18-groove, 20-intake port,

22-exhaust port, 24-combustion chamber,

26-Ministry of Foreign Affairs.

Hereinafter will be described in detail with respect to the configuration and operation effects based on the accompanying drawings for the present invention.

In the present invention, the intake and exhaust air camshaft 12 having the bevel gear 14 mounted to the upper end of the cylinder head 10 is installed, and the intake and exhaust air valve having the bevel gear 14 'mounted inside the cylinder head 10 ( 16), but the bevel gear 14 is installed in engagement with the bevel gear (14 '), by forming a groove 18 on one side of the intake and exhaust air valve 16 by the rotation of the intake and exhaust air valve (16). When the groove 18 faces the intake port 20, fuel is sucked into the combustion chamber 24 from the intake port 20, and when the groove 18 faces the exhaust port 22, the exhaust port 22 in the combustion chamber 24. The exhaust gas is made to discharge.

As shown in FIG. 3, the intake / exhaust air valve 16 of the vehicle engine, as shown in FIG. 3, has a conventional camshaft composed of two intake camshafts and an exhaust camshaft, and the valve also includes two intake valves and an exhaust valve. In this case, a single camshaft (that is, an intake and exhaust air camshaft) and one valve (intake and exhaust air valve 16) are unified and installed inside the cylinder head of the engine.

The intake / exhaust air valve 16 is coupled to the bevel gear 14 coupled to the intake and exhaust air cam shaft 12, which is coupled to the bevel gear (14 ') at the upper end, as the intake and exhaust air cam shaft 12 is rotated as the intake and exhaust air valve (12) (16) is also made to rotate.

In addition, the groove 18 is formed on one side of the outer cylinder portion 26 of the intake and exhaust air valve 16 to exhaust the exhaust gas after the fuel is sucked or burned along the groove 18.

The air intake and exhaust valve 16 is located in the boundary between the intake port 20 and the exhaust port 22, as shown in the accompanying drawings, Figure 4 and 5, the combustion chamber through the suction port 20 in the intake stroke Since the fuel should be sucked into the inlet 24, the recess 18 formed in the intake / exhaust air valve 16 is directed toward the intake port 20 of the ports 20 and 22, and the fuel entering the combustion chamber 24 is connected to the ignition plug. When it is ignited, it is burned through compression and explosion stroke.

In addition, in the exhaust stroke, as shown in FIG. 4B, the exhaust gas remaining after the groove 18 of the intake and exhaust air valve 16 is burned toward the exhaust port 22 is exhausted along the groove 18. 22)

In the compression and explosion strokes of the four strokes of the engine, as shown in the accompanying drawings in FIG. 5, the grooves 18 of the intake and exhaust air valve 16 are provided to either the intake port 20 and the exhaust port 22. It is located in a neutral position without facing, so that the outer cylinder portion 26 of the intake and exhaust air valve 16 can seal the intake port 20 and the exhaust port 22.

Therefore, the intake / exhaust air valve 16 seals the intake port 20 and the exhaust port 22 and mixes with the air sucked into the combustion chamber 24 while the piston is moved to the top dead center by the driving of the engine. When the fuel is ignited by the spark plug and exploded, it expands. At this time, the piston moves to the bottom dead center by rotating the crank shaft connected to the piston to drive the vehicle.

Therefore, the present invention can increase the combustion efficiency by reducing the surface of the combustion chamber, there is an effect that can reduce the overall joint of the engine by removing the valve face.

Claims (1)

An air intake / exhaust air camshaft 12 having a bevel gear 14 mounted to an upper end of the cylinder head 10 is installed, and an air intake / exhaust air valve 16 equipped with a bevel gear 14 'is provided inside the cylinder head 10. The bevel gear 14 is installed to be engaged with the bevel gear 14 ', and a groove 18 is formed at one side of the intake and exhaust air valve 16 so that the bevel gear 14 is rotated by the intake and exhaust air valve 16. ) Is directed to the intake port 20, fuel is sucked from the intake port 20 to the combustion chamber 24, and when the groove 18 is directed to the exhaust port 22, exhaust gas is exhausted from the combustion chamber 24 to the exhaust port 22. Intake and exhaust common valve of the vehicle engine configured to discharge gas.