KR19980045537U - Pistons for automotive engines - Google Patents

Abstract

The present invention relates to a piston of an automotive engine that is in contact with an inner wall of a cylinder and reciprocates up and down. In particular, it is possible to alleviate high impact and noise applied to a piston, and to reduce engine output due to friction between the piston and the cylinder wall. To prevent it.

To this end, the piston of the present invention is formed by separating the head piston portion 6 and the lower piston portion 7, the spring 9 of the high-strength force is installed therebetween. According to this configuration, the highly explosive impact generated in the combustion chamber of the engine is stored and mitigated by the spring, thereby reducing the impact and noise. In addition, the contact area between the piston and the cylinder is reduced by the spring-loaded portion, so that friction loss is reduced and the output of the engine is improved.

Description

Pistons for automotive engines

The present invention relates to a piston of an automobile engine that is reciprocated up and down in contact with an inner wall of a cylinder, and in particular, to reduce the impact and noise caused by the explosion pressure applied to the piston, and to realize a rapid discharge of exhaust gas. It relates to a piston structure.

As is well known, the engine of a motor vehicle is a representative internal combustion engine that obtains a driving force as a mixer in which fuel and air are mixed is sucked into the combustion chamber and combusted.

As shown in FIG. 1, such an automobile engine has a piston 8 reciprocating upward and downward in a cylinder 2 by an explosion of a mixer sucked into the combustion chamber 1, and the piston 8. The connecting rod 4 interlocked with the c) rotates the crank mechanism to obtain power.

On the other hand, a piston ring 5 including two compression rings and one oil ring is provided at the head of the piston 8 as a means for preventing air leakage from the mixer by maintaining airtightness with the inner wall of the cylinder 2. .

In the above-described automobile engine of the prior art, the piston is directly subjected to a strong explosion pressure of the combustion chamber, there is a problem that a large impact and noise is generated.

In addition, since the piston reciprocates up and down along the cylinder at an extremely high speed, a large friction occurs at the contact portion between the piston and the cylinder, thereby causing a problem that the output of the engine is lowered.

The present invention has been made to solve the above-mentioned problems of the prior art, the explosion impact applied to the upper surface of the piston and the resulting noise is alleviated, the friction area between the piston and the cylinder inner wall is reduced to reduce the output of the engine It provides a piston for an automotive engine that is intended to be improved.

1 is a cross-sectional view showing a typical automobile engine.

Figure 2 is a cross-sectional view showing a piston of the engine for automobiles according to the present invention.

Explanation of symbols on the main parts of the drawings

1: combustion chamber 2: cylinder

5; Piston Ring 6: Head Piston Part

7: Lower piston part 8: Piston

9: spring

As a means for achieving the above object, the piston of the present invention is formed into two parts, in order to reduce the explosion impact, and to reduce the friction loss with the cylinder wall, with a high-strength spring in between Is done.

According to this configuration, the highly explosive impact generated in the combustion chamber of the engine is stored and mitigated by the spring, thereby reducing the impact and noise.

In addition, the frictional area is reduced as the contact area between the piston and the cylinder is reduced by the spring-loaded portion.

Hereinafter, preferred embodiments for realizing the present invention will be described in more detail with reference to the accompanying drawings.

EXAMPLE

2 is a cross-sectional view showing in detail the structure of a vehicle engine, in particular, a piston according to the embodiment.

In the description of this embodiment, the same reference numerals are used for the configuration of this embodiment, which is the same as the drawings cited in the prior art, and will not be described again for clarity.

In the drawings, reference numeral 1 denotes a combustion chamber, 2 cylinders, and 4 a connecting rod.

Here, the piston (8) according to the present embodiment is installed to maintain the airtight on the inner wall of the cylinder (2), the crank mechanism through the connecting rod (4) while reciprocating up and down under the explosion pressure of the combustion chamber (1) Rotate

The piston 8 of this embodiment comprising such configurations is formed in two parts to relieve the explosion pressure exerted on its upper surface and to minimize the friction loss with the cylinder 2 wall.

More specifically, the piston 8 of the present embodiment is composed of a head piston part 6 forming the bottom of the combustion chamber 1, and a lower piston part 7 to which the connecting rod 4 is coupled. It consists of a structure in which the spring 9 of a high tension force is provided between the part 6 and the lower piston part 7.

Here, the head piston part 6 is provided with at least two piston rings 5 in order to maintain airtightness with the wall of the cylinder 2.

In addition, the spring 9 is formed of a high rigidity spring to receive the explosion pressure of the combustion chamber 1 to the lower piston part 7, and at least the head piston part 6 and the lower part when the mixer explodes. The strength of the piston parts 7 must be maintained so as not to contact each other.

Based on the configuration described above, the piston 8 of the present embodiment has the explosion pressure stored and mitigated by the spring 9, and the impact and noise are reduced.

In addition, the discharge of the exhaust gas can be achieved more quickly by the spring 9 force.

In addition, the piston 8 of this embodiment reduces the contact area with the cylinder 2 wall, thereby reducing frictional losses and improving the output of the engine.

Through the embodiments described above, it can be seen that the piston of the engine for automobiles according to the present invention substantially solves the problems of the prior art.

In other words, according to the present invention, the impact and noise applied directly to the piston are attenuated, thereby increasing the durability of the piston.

In addition, the friction loss between the piston and the cylinder wall is reduced, and the output of the engine can be improved.

On the other hand, the present invention is not limited to the above-described specific preferred embodiment, any person having ordinary knowledge in the field to which the subject innovation belongs without departing from the gist of the subject innovation claimed in the utility model registration claims Modifications may be made.

Claims (2)

In the piston of the automobile engine which is installed to maintain the airtight on the cylinder inner wall, and rotates the crank mechanism through the connecting rod while being reciprocated up and down under the explosion pressure of the combustion chamber, And a spring provided between the head piston part and the lower piston part, the head piston part forming the bottom surface of the combustion chamber, the lower piston part to which the connecting rod is coupled, and the piston of the automobile engine. The piston of claim 1, wherein at least two piston rings are installed in the head piston part.