KR101444950B1 - Cylinder head structure - Google Patents

Abstract

The present invention relates to a cylinder head structure. The present invention relates to an air conditioner comprising: a suction passage through which air is sucked into a combustion chamber; An injector provided adjacent to the suction passage for supplying fuel into the combustion chamber; And a heat plug installed adjacent to the injector and the intake passage for generating heat to heat the cylinder head.

Therefore, according to the present invention, even in the case of an engine having a plurality of combustion chambers, it is possible to assemble easily while allowing simultaneous freezing and simultaneous combustion.

Cylinder head structure, heat plug, heat transfer part

Description

Cylinder head structure

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylinder head structure, and more particularly, to a cylinder head structure in which fuel can be burned smoothly even when the external temperature is low.

Generally, the gasoline direct injection engine is injected only into the combustion chamber, and the fuel is directly injected into the combustion chamber by an electronically precisely controlled injector. This method can be used not only as a homogeneous mixer, To achieve high output and low fuel consumption at the same time.

1 is a view showing a cylinder head structure according to the prior art.

In a typical engine, a cylinder block is combined with a cylinder head 10 to form a cylinder. In Fig. 1, a principal part of the cylinder head is shown as a center. On the other hand, a piston is housed in a lower portion of the cylinder head 10. [

At one side of the cylinder head 10, a suction passage 20 through which the outside air is sucked is provided. The other side of the cylinder head 10 is provided with an injector 30 for supplying fuel.

The fuel supplied by the injector 30 and the air delivered through the intake passage are mixed in the combustion chamber 12 and are combusted in the combustion chamber 12.

On the other hand, when the vehicle is started when the ambient temperature is low (hereinafter referred to as " cold simultaneous "), the temperature of the external air and the temperature of the cylinder head are lowered. Therefore, there is a problem that hydrocarbons are excessively discharged due to incomplete combustion.

In order to prevent this, the conventional cylinder head 10 is provided with a Valve Control Motion (hereinafter referred to as VCM) valve 22 in the middle of the intake passage 20. And the VCM valve 22 is fixed to the inside of the suction passage 20. [ The VCM valve 22 rotates around a fixed axis to regulate the opening of the suction passage 20. [ Whereby the flow of the air sucked through the suction passage 20 can be changed.

That is, the VCM valve 22 generates a tumble in the combustion chamber 12 to vaporize the fuel.

However, the conventional cylinder head structure has the following problems.

First, since the general engine has a plurality of combustion chambers and a plurality of intake passages, the VCM valves individually installed in the respective intake passages greatly reduce the production efficiency.

Second, since the VCM valve is provided inside the suction passage, even if the VCM valve has a predetermined volume and the intake passage is completely opened, the VCM valve has a constant shape, .

SUMMARY OF THE INVENTION It is an object of the present invention to provide a cylinder head structure that can be smoothly burned at the same time as a freezing operation and is easy to assemble.

Further, the present invention is to provide a cylinder head structure that does not affect the flow of air and fuel sucked into the combustion chamber when not in use.

In order to attain the above object, the present invention provides an air conditioner comprising: a suction passage through which air is sucked into a combustion chamber; An injector provided adjacent to the suction passage for supplying fuel into the combustion chamber; And a heat plug installed adjacent to the injector and the intake passage for generating heat to heat the cylinder head.

Particularly, the heat plug can be in non-contact with the injector and the intake passage.

Preferably, the heat plug is not in contact with fuel injected from the injector and air drawn into the intake passage.

The heat plug may include a heat generating unit generating heat, a tab extending from the heat generating unit to fix the heat plug to the cylinder head, and a terminal unit transmitting power to the heat plug.

Further, the heat generating portion may include a heat transfer portion provided adjacent to the combustion chamber.

The heat generating unit may further include a plurality of heat transfer units, and a connection unit connecting the plurality of heat transfer units.

Of course, it is preferable that the heat transfer part has a larger cross-sectional area than the connection part.

According to the present invention, it is possible to assemble easily even in an engine having a plurality of combustion chambers, while allowing simultaneous freezing and simultaneous combustion to be performed smoothly, and productivity is improved.

Further, according to the present invention, the fuel can be burned while not influencing the flow of the air and the fuel sucked into the combustion chamber, unless the engine is cold.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

2 is a cross-sectional side view of the cylinder head structure according to the present invention. For convenience of explanation, FIG. 2 shows the center of the cylinder head. This will be described below with reference to Fig.

In the engine according to the present invention, the cylinder block and the cylinder head 110 are combined to form a cylinder.

At one side of the cylinder head 110, a suction passage 120 through which external air is sucked is installed. The suction passage 120 is a tube through which air flows, and a hole is formed at the center. According to the present invention, unlike the prior art, it is not required to provide a separate component in the intake passage 120 for smoothly vaporizing the cold simultaneous fuel.

An injector 130 for supplying fuel is provided on the other side of the cylinder head 110. The spray 132 ejected from the injector 130 means an average volume of fuel ejected from the injector 130.

At this time, the spray 132 may vary according to the amount of fuel ejected from the injector 130, the speed of the fuel, and the like.

Meanwhile, the cylinder head 110 may be provided with a combustion chamber 112 having a space in which fuel and air are mixed and combusted. That is, the fuel supplied through the injector 130 and the air supplied through the intake passage 120 are mixed in the combustion chamber 112.

Further, the cylinder head 110 may further include a heat plug 140 installed adjacent to the injector 130 and the intake passage 120 to generate heat to heat the cylinder head 110 desirable. The term " adjacent " is used herein to mean " neighboring ", " near ", or " near "

The side surface of the heat plug 140 may have a circular shape. According to this, the contact area between the heat plug 140 and the cylinder head 110 can be maximized, and the heat efficiency of the heat plug 140 can be improved. Of course, the side surface of the heat plug 140 may have a polygonal shape.

The shape of the heat plug 140 will be described in detail with reference to FIG.

The heat plug 140 can be in non-contact with the injector 130 and the intake passage 120. In other words, the heat plug 140 may be spaced apart from the injector 130 and the intake passage 120 at a predetermined interval.

Therefore, the heat plug 140 of the present invention does not affect the fuel supplied from the injector 130, that is, the air passing through the spray 132 and the intake passage 120, depending on its shape.

Further, the heat plug 140 is preferably not in contact with the fuel sprayed from the injector 130, that is, the air sucked into the spray 132 and the intake passage 120. This is because the heat plug 140 is embedded in the cylinder head 110 while being in non-contact with the injector 130 and the intake passage 120.

Therefore, the heat plug 140 of the present invention does not affect the flow of fuel or air due to the shape of the heat plug 140, unlike the prior art. In other words, when the heat plug 140 is not operated, fuel and air are supplied into the combustion chamber 112 only by the original shape of the injector 130 and the intake passage 120.

3 is a view showing a heat plug according to the present invention. This will be described below with reference to Fig.

The heat plug 140 includes a heat generating part 142 for generating heat, a tab 146 extending from the heat generating part 142 to fix the heat plug 140 to the cylinder head 110, And a terminal portion 148 for supplying power to the plug 140.

3, the heat generating part 142, the tab part 146, and the terminal part 148 are formed in this order. However, this order can be changed for convenience of assembly.

The heat generating portion 142 is preferably made of a material having excellent heat transfer such as copper as a portion where electric energy is converted into thermal energy.

Particularly, the heat generating unit 142 may further include a heat transfer unit 143 disposed adjacent to the combustion chamber 112. The mounting position of the heat transfer part 143 will be described in detail with reference to FIG.

The heat generating unit 142 may further include a plurality of heat transfer units 143 and a connection unit 144 for connecting the plurality of heat transfer units 143. In other words, the heat transfer part 143 is connected to both ends of the connection part 144 so that the electric energy supplied from the terminal part 148 can be supplied to the respective heat transfer parts 143.

Further, the heat transfer part 143 may be thicker than the connection part 144. This is to improve heat efficiency of the heat plug 140 by transmitting heat to the cylinder head 110 near the combustion chamber 112. This is to heat only the fuel and air flowing into the combustion chamber 112 by heating only in the vicinity of the combustion chamber 112.

Meanwhile, the connection part 144 may function to support the heat plug 140 having a long shape in the longitudinal direction.

The tab portion 146 can be forcedly inserted into the cylinder head 110 so as to be firmly fixed to the cylinder head 110. In particular, the tab portion 146 may be provided at an end of the heat plug 140 rather than a middle portion of the heat plug 140 for the sake of assembling the heat plug 140.

The terminal unit 148 may be located at the end of the heat plug 140 so as to be connected to an electric power source. The terminal unit 148 may be connected to a power source and a relay to selectively supply power to the heat plug 140 to control the operation of the heat plug 140.

4 is a front elevational sectional view of a cylinder head structure according to the present invention. This will be described below with reference to Fig.

4, a cylinder head 110 having a plurality of combustion chambers 112 is shown. The engine of an automobile generally has a plurality of combustion chambers 112, and each combustion chamber 112 may be referred to as a cylinder or a cylinder.

A passage 114 is formed in the cylinder head 110 so that the heat plug 140 can be embedded. The passage 114 may have the same cross-sectional area as that of the tab portion 146 and the heat generating portion 142 of the heat plug 140.

Of course, the passage 114 may have a cross-sectional area slightly larger than that of the tab portion 146 and the heat generating portion 142 of the heat plug 140 for the convenience of assembling the heat plug 140 It is possible.

In the heat plug 140 according to the present invention, the heat transfer part 143 is located at a corresponding position adjacent to each combustion chamber 112.

In other words, the heat transfer part 143 can be installed at bore pitch intervals. Bore pitch refers to the distance between the cylinder and the cylinder. Precisely, the distance from the center of the bore to the center of the adjacent bore is called the bore pitch.

FIG. 4 shows a configuration in which only one heat transfer portion 143 is formed in one combustion chamber 112. In other words, in FIG. 4, the number of heat transfer portions 143 is set to be equal to the number of cylinders at bore pitch intervals so that heat can be transmitted to all the cylinders.

Of course, unlike FIG. 4, it is possible to mount two or more heat transfer parts 143 in one combustion chamber 112.

For example, when two heat transfer portions 143 are formed in one combustion chamber 112, the two heat transfer portions 143 may be symmetrically disposed about the combustion chamber 112.

The aforementioned heat plug is mounted on the cylinder head as follows.

One end of the heat plug (140) is inserted into the passage (114) formed in the cylinder head (110). Then, the heat plug (140) is inserted into the passage (114).

Since the cross-sectional area of the passage 114 is larger than the cross-sectional area of the heat generating portion 142 and the tab portion 146, the heat plug 140 can be easily inserted into the passage 114 .

The heat plug 140 may be inserted into the passage 114 such that the heat transfer portion 143 is positioned at the center of the combustion chamber 112 or the intake passage 120.

Then, power is connected to the terminal unit 148.

The operation of the above-described heat plug is as follows.

Power is supplied to the heat plug 140 through the terminal portion 148 when the engine is started and during the cold start. Accordingly, the cylinder head 110 is heated while the heat transfer portion 143 is heated. The heat spreads around the heat transfer part 143.

Air is supplied through the intake passage 120, and fuel is supplied through the injector 130. Air and fuel are mixed in the combustion chamber (112).

At this time, the air and the fuel come into contact with the heated cylinder head 110. Therefore, it can be burned more smoothly than when passing through a cylinder head which is kept in a cold state without being heated. Therefore, even when the cylinder head 110 is heated to a cold state, the temperature of the cylinder head 110 is similar to that of the case where the cylinder head 110 is not cold starting, thereby reducing the amount of hydrocarbons generated at the same time.

In other words, according to the present invention, a condition that the fuel injected by heating the cylinder head 110 prior to the start of the cold start can be vaporized immediately upon contact with the metal surface of the cylinder head 110, Can be improved.

After the predetermined time has elapsed, after the cylinder is heated to the predetermined temperature, the power is cut off from the terminal unit 148 to prevent the power from being supplied to the heat plug 140. That is, the operation of the heat plug 140 is stopped.

On the other hand, in the present invention, the power is not supplied to the heat plug 140 by the terminal unit 148 when it is not cold, that is, when it is operated at a normal temperature. Therefore, the heat plug 140 does not affect the flow of the fuel and the air supplied through the intake passage 120 and the injector 130.

Therefore, according to the present invention, according to the original design content of the engine, fuel and air may be mixed and burned in the combustion chamber 112 when the engine is not in the cold state unlike the prior art.

It is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing a cylinder head structure according to the prior art; Fig.

2 is a cross-sectional side view of a cylinder head structure according to the present invention.

3 is a view showing a heat plug according to the present invention.

4 is a front elevational sectional view of the cylinder head structure according to the present invention.

Description of the Related Art [0002]

10, 110: cylinder head 12, 112: combustion chamber

20, 120: suction passage 30, 130: injector

132: Spray 140: Heat plug

142: heat generating portion 143: heat transfer portion

144: connection part 146: tab part

148:

Claims (7)

A suction passage through which air is sucked into the combustion chamber; An injector provided adjacent to the suction passage for supplying fuel into the combustion chamber; And And a heat plug installed adjacent to the injector and the intake passage for generating heat to heat the cylinder head, The heat plug includes a heat generating part generating heat, A tab portion extending from the heat generating portion and fixing the heat plug to the cylinder head; And a terminal portion for transmitting power to the heat plug, Wherein the heat generating portion includes a heat transfer portion provided adjacent to the combustion chamber, The heat- Further comprising a plurality of heat transfer parts, and a connection part connecting the plurality of heat transfer parts, Wherein the heat transfer portion has a larger cross-sectional area than the connecting portion. The method according to claim 1, Wherein the heat plug is not in contact with the injector and the intake passage. The method according to claim 1, Wherein the heat plug is not in contact with fuel injected from the injector and air sucked by the intake passage. delete delete delete delete

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