KR200157592Y1 - Valve's open/close device of variable camshaft of engine - Google Patents

Abstract

The camshaft is variable to adjust the intake air amount by adjusting the on / off valve for inflowing air while the camshaft is variable at low speed of the engine. In the related art, the camshaft 5 is always driven at a constant rotation radius to maintain the low speed of the engine. Regardless of the rotational speed, the engine output is lowered at a low speed because the engine is always opened and closed constantly. In the present invention, the fasteners 14 and 14a are provided at both ends of the cam shaft 12 provided with the lobe 10 at a predetermined position in the center. The camshaft 12 is reciprocated through the feeding means and the discharging means, and the camshaft is moved to the left and right according to the low speed of the engine so that the intake valve is variable so that the low speed torque is improved. To ensure safe and economical use by reducing the number of children and ensuring the stability of children.

Description

Valve opening and closing device by variable cam shaft of automobile engine

The present invention relates to a cam shaft variable device for opening and closing an air intake valve in an engine of a vehicle. More specifically, the cam shaft is variable according to the low speed of the engine, and the inlet air volume is adjusted by adjusting the on / off valve for introducing air. It relates to a valve opening and closing device by a variable cam shaft of an engine for automobiles to be adjusted.

In general, an automobile is equipped with an engine, which is a machine that generates power by using various kinds of natural energy, and converts thermal energy into mechanical energy to achieve the propulsion of the automobile. A valve opening and closing mechanism for opening and closing is used.

The valve opening and closing mechanism is disposed on the cylinder head 1 as shown in FIG. 1 to block or open the inflow path 2 and to install a suction valve 3 which is pressurized by the spring 4, and the suction valve is provided. The camshaft 5 is made to correspond to the swing arm 4 provided in the upper end of (3).

Therefore, in the related art, the swing arm 4 is pressed while rotating with the cam shaft 5 driven when the engine is driven, so that the intake valve 3 is pushed and extended by the spring 4 to the cylinder head 1. Through the inlet path (2) formed to supply the air for driving the engine.

However, the technical means for such a variable valve is that the camshaft 5 is always driven at a constant rotation radius, so that the engine output at low speed is lowered because the camshaft 5 is always opened and closed at a constant speed regardless of the low speed state of the engine.

In addition, since the shaft cam 5 has a constant and fixed profile, in order to create a variable valve means, the valve shaft is controlled by artificially turning the cam shaft to control the valve tuning, or by installing cams of various shapes to the engine rotation speed. Since the valve is opened and closed, there is a drawback of failing to obtain a safe torque due to the cumbersome operation and the inaccurate action caused by the high speed rotation.

The present invention has been devised to solve the above-described drawbacks, and its purpose is to adjust the opening and closing amount of the intake valve according to the rotational speed of the engine to introduce only the air necessary for low speed, thereby improving low torque and reducing fuel economy. The present invention provides a valve opening and closing device by a variable cam shaft of an automobile engine capable of securing safety of idle.

The above object is a variable valve device consisting of a suction valve which is arranged at a predetermined position of the cylinder head provided inside the air inlet path connected to the engine chamber, the new pressure side by the drive of the cam shaft,

It is achieved by technical means for arranging fasteners at both ends of the camshaft provided with lobes at a predetermined position in the central portion so that the camshaft makes a reciprocating motion through the conveying means and the discharging means.

1 is a schematic cross-sectional view showing a conventional valve drive device.

2 is an overall configuration diagram of a cam shaft drive device according to the present invention.

3 is a sectional view of main parts of a drive device of the present invention.

4 is an exploded perspective view showing a cam shaft and an adjustment plate according to the present invention.

* Explanation of symbols for main parts of the drawings

10: lobe 12: camshaft

14, 14a: fixture 16, 16a: compression chamber

18: Euro 20: Inflow channel

28: through hole 32: plate

34: spring

Hereinafter, the present invention by the accompanying drawings of an embodiment will be described in detail. 2 is an overall configuration diagram of a camshaft drive device according to the present invention, and FIG. 3 is a sectional view of the main components of the drive device of the present invention, and FIG. 4 is an exploded perspective view showing the camshaft and the adjustment plate according to the present invention. When the valve opening and closing device by the variable cam shaft of the automobile engine of the present invention is disposed at a predetermined position of the cylinder head 54 provided therein, the air inflow path 52 connected to the engine compartment 50 is disposed on the cam shaft 12. The variable valve device which consists of the suction valve 56 which carries out a new pressure side by the drive of () is provided.

In addition, a lobe 10 having a tapered outer surface is provided at a predetermined position in the central portion of the cam shaft 12, and fasteners 14 and 14 a are disposed at both ends of the cam shaft 12, so that the pressure feeding means and the discharge means are provided. Through the cam shaft 12 is configured to achieve a reciprocating motion.

Compression chambers 16 and 16a, one end of which is opened, are provided inside the fixtures 14 and 14a, and both ends of the cam shaft 12 are inserted into the upper and lower ends of the compression chambers 16 and 16a. 18 is formed and the hydraulic pressure which flowed in into the compression chamber 16 (16a) is discharged | emitted.

In addition, the pumping means is formed so that the hydraulic pressure introduced through the inflow passage 20 provided in the cam shaft 12 to achieve a liquid compression in the compression chamber 16 of the fixture 14, the compression chamber 16 The hydraulic pressure transferred to) is configured to be transferred to the flow path 18 through the through hole 28.

On the other hand, one side of the cam shaft 12 is attached to the plate 32 is configured to be a new pressure side of the spring 34 built in the fixture (14a) when the reciprocating movement and the suction of the lower end of the cam shaft 12 The surface pressure holding plate 66 attached to the upper end of the valve 56 is provided.

The present invention made of such a configuration is able to adjust the opening and closing amount of the intake valve 56 according to the rotational speed of the engine. When the hydraulic pressure is injected into the cam shaft 12, the hydraulic pressure is pumped through the inflow passage 20 to fix the fixture ( It is sent to the compression chamber 16 provided in 14) and the hydraulic pressure is increased to move the camshaft 12 to the right direction, so that the plate 32 is moved from the fixture 14a on the other side to the fixture 14a. The embedded spring 34 is to be compressed.

In this process, the lobe 10 provided at the center of the camshaft 12 is formed as a taper, and is moved to the right side according to the transfer of the camshaft 12 to the surface pressure retaining plate disposed at the upper end of the suction valve 56. The diameter of the lobe 10 is pushed toward the smaller side so that only the amount of air required at low speed is introduced.

Then, the camshaft 12 is transferred to the right side by the hydraulic pressure increase from the compression chamber 16 to open the through hole 28 connecting the compression chamber 16 and the flow path 18 to the through hole 28. When the hydraulic pressure of the 16 is moved through the through hole 28 and then discharged through the flow path 18 provided in the fasteners 16 and 16a, the cam shaft 12, which has been transferred to the right side, is moved to the compression chamber of the fastener 14a. The large diameter of the tapered lobe 10 pressurizes the surface pressure holding plate 66 to the left by the repulsive force of the spring 34 embedded in 16a), thereby increasing the opening / closing amount of the suction valve 56 to a higher speed. It supplies the air needed for rotation.

The present invention made up of such a configuration transfers the cam shaft to the left and right according to the low speed of the engine so that the intake valve is variable so that the low speed torque is improved, fuel efficiency is reduced, and children's stability is secured. It has the effect of accomplishing.

Claims (3)

In the variable valve device consisting of an intake valve connected to the engine compartment at a predetermined position of the cylinder head provided in the interior and the new pressure side by the drive of the camshaft, the variable valve device is a lobe (10) Camshaft 12 is formed; Fasteners (14) (14a) coupled to both ends of the camshaft; It is formed inside the fixture (14, 14a), one end is open and the both ends of the cam shaft 12 is inserted, and the upper and lower ends include a compression chamber (16, 16a) is provided with a flow path (18) Valve opening and closing device by a variable cam shaft of the engine for automobiles made by. 2. The valve opening and closing of the automobile engine by a variable cam shaft, characterized in that the through hole 28 is formed so that a constant hydraulic pressure is transferred from the compression chamber 16 to the flow path 18 in the fixture 14. Device. The cam shaft 12 has a plate 32 attached to one side of the camshaft 12, and a spring 34 is embedded in the fastener 14a to move the plate of the camshaft while the plate of the camshaft moves. Valve opening and closing device by a variable cam shaft of the engine for automobiles, characterized in that configured to be pressed.