JPH04137234U - Sodium-filled internal combustion engine for cooling - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention relates to a cooling sodium-filled internal combustion engine that is filled with liquid sodium that can cool heat spots in the combustion chamber. The purpose is to enable cooling and ensure normal combustion conditions. [Structure] In an internal combustion engine equipped with a combustion chamber 4 and a water jacket 9C capable of cooling the surroundings of this combustion chamber 4,
A refrigerant chamber 11 is formed between the heat spot 4A of the combustion chamber 4 and the water jacket 9C, and a liquid sodium 1 that can cool the heat spot 4A is provided in the refrigerant chamber 11.
2 is sealed so that the heat spot 4A can be cooled via this liquid sodium 12.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to an internal combustion engine, and particularly relates to a liquid that can cool heat spots in the combustion chamber. The present invention relates to a cooling sodium-filled internal combustion engine that is filled with body sodium.

0002

[Conventional technology]

In an internal combustion engine, air or water is placed around the combustion chamber to prevent it from heating up. Cooling is performed by circulating water, but water cooling is advantageous for partial cooling; For example, in a 4-stroke engine, the cylinder head is the part most affected by combustion heat. Therefore, a water-cooled type is used and a water jacket is placed around the combustion chamber to reduce this temperature. The cooling water inside the water jacket is circulated sufficiently.

0003

[Problem that the idea aims to solve]

By the way, in the above-mentioned conventional water-cooled internal combustion engine, for example, a Water jackets are designed to avoid stagnation points in the combustion chamber, e.g. For details such as between each intake valve and exhaust valve, water jackets should be installed due to the structure. It is difficult to cool this part even if you want to.

0004 As a result, these areas that cannot be cooled become heat spots, causing the plague to cool. This may adversely affect combustion, such as causing ignition (early ignition), and reduce engine fuel efficiency and output. There is a problem in that it tends to lead to a decline in force performance.

[0005] This invention was devised in view of the above-mentioned problems, and it It is also possible to reliably cool the tosspot to ensure normal combustion conditions. An object of the present invention is to provide a sodium-filled internal combustion engine for cooling.

[0006]

[Means to solve the problem]

For this reason, the sodium-filled internal combustion engine of the present invention has a combustion chamber and a In an internal combustion engine equipped with a water jacket that can cool the surroundings, the combustion chamber A refrigerant chamber is formed between the heat spot and the water jacket, and the refrigerant chamber It is characterized by containing liquid sodium that can cool the heat spot. It is said that

[0007] In addition, a good thermal conductor is installed between the refrigerant chamber and the water jacket. It is desirable to interpose a heat transfer member.

[0008] Furthermore, the surface of the heat transfer part between the refrigerant chamber and the water jacket is It is desirable to form an uneven surface that can promote conduction.

[0009]

[Effect]

In the sodium cooling internal combustion engine of the present invention described above, when the combustion chamber heats up, The heat from this heat spot in the combustion chamber is taken away as heat of vaporization of liquid sodium in the refrigerant chamber. heat spots are cooled. In the refrigerant chamber, vaporized sodium is It is cooled and liquefied by the cooling water inside the water jacket, and then it is used again in the heat spot. Provided for cooling.

0010 In addition, a good thermal conductor is installed between the refrigerant chamber and the water jacket. The heat transfer member between the refrigerant chamber and the water jacket may be interposed. By forming an uneven surface on the surface of the transfer part that can promote heat conduction, the liquid in the refrigerant chamber Cooling by sodium cooling water is promoted and cooling efficiency of the heat spots mentioned above is improved. will improve.

[0011]

【Example】

Hereinafter, embodiments of the present invention will be explained with reference to the drawings. Fig. 1 shows a sodium-filled internal combustion engine for cooling as the first embodiment. 2 is a diagram schematically showing the planar arrangement of the main parts, and FIG. 3 is a cross-sectional view of the main parts of FIG. 2 is a cross-sectional view of a main part of a cooling sodium-filled internal combustion engine as a second embodiment of the plan; Figure 4 is a cross-section of the main parts of a cooling sodium-filled internal combustion engine as a third embodiment of the present invention. It is a diagram. In addition, in Figures 3 and 4, the same symbols as in Figures 1 and 2 indicate the same or equivalent items. . Further, the internal combustion engine according to each embodiment is a water-cooled 4-stroke reciprocating engine. It has multiple cylinders, but since each cylinder has the same configuration, each diagram shows only one part of the cylinder. Only the cylinder is shown.

0012 To explain the sodium cooling internal combustion engine of the first embodiment, Figs. As shown in the figure, this engine has two intake valves and two exhaust valves for each cylinder. , a cylinder head 2 is arranged on a cylinder block 1 via a gasket (not shown). The cylinder bore 1A in the cylinder block 1, the piston 3 and the cylinder A combustion chamber 4 is defined by the lower surface of the cylinder head 2.

[0013] An intake port 5A and an exhaust port 6A are led into the combustion chamber 4, and each have an intake port 5A and an exhaust port 6A. An intake valve 7 and an exhaust valve 8 are installed. In addition, as shown in FIG. 2, the combustion chamber 4 A spark plug 10 is installed in the upper center.

[0014] Cooling water flows around the combustion chamber 4 in the cylinder head 2. Water jackets 9A, 9B, and 9C are formed. In other words, intake port 5 Water jackets 9A and 9B are formed below A and the exhaust port 6A. A water jacket 9C is formed above the port 5A and exhaust port 6A. There is.

[0015] And the surface of the combustion chamber 4 between the mutually adjacent intake ports 5A and exhaust ports 6A. There is a heat source on the surface that cannot be sufficiently cooled by the cooling water in the water jacket 9C. Pot 4A exists, but this heat spot 4A and water jacket 9C A refrigerant chamber 11 is bored between them. In this example, each combustion chamber 4 has an intake valve 7 and Two exhaust valves 8 are provided, and a heat spot 4A exists between each valve. A total of four refrigerant chambers 11 are provided between each valve. In addition, the lower end of each refrigerant chamber 11 is It is formed up to a position close to the heat spot 4A.

[0016] Liquid sodium 12 is sealed inside the refrigerant chamber 11 as a refrigerant. ing. In other words, the refrigerant chamber 11 is open to the water jacket 9C side. Liquid sodium 12 is introduced into the refrigerant chamber 11 from the water jacket 9C side. After that, the water jacket 9C side is closed with a plug 13 as a heat transfer member. Thus, the liquid sodium 12 is in a sealed state within the refrigerant chamber 11.

[0017] In this way, the reason why liquid sodium 12 is used as a refrigerant is because sodium 12 The characteristics such as melting point and boiling point are suitable for the temperature state in which the combustion chamber 4 is to be cooled, and the liquid This is because the heat of vaporization of sodium 12 is relatively large.

[0018] In addition, the plug 13 is made of a good thermal conductor such as aluminum, and is made of a good heat conductor such as aluminum. between the liquid sodium 12 in the chamber 11 and the cooling water in the water jacket 9C. It facilitates heat conduction.

[0019] Note that numeral 5 is an intake passage, and 6 is an exhaust passage.

[0020] The first embodiment of the present invention is a sodium-filled internal combustion engine for cooling, as described above. When the combustion chamber 4 is heated, the heat spot of the combustion chamber 4 The 4A heat is absorbed by the liquid sodium 12 sealed in the refrigerant chamber 11, and becomes heat. Spot 4A is cooled.

[0021] In other words, when the heat spot 4A heats up, this heat causes the liquid in the refrigerant chamber 11 to As the body sodium 12 evaporates, heat from the heat spot 4A is removed. stop The gaseous sodium 12A thus vaporized is placed above the refrigerant chamber 11 at the stopper 1. 3, and is cooled by cooling water flowing through the water jacket 9C, It turns into liquid sodium 12 again and falls downward in the refrigerant chamber 11, becoming a heat spot. 4A is cooled.

[0022] In this way, heat spots in the combustion chamber 4, which conventionally could not be directly cooled with cooling water alone, are The plate 4A is cooled through the vaporization action of the liquid sodium 12. Prevents ignition (early ignition), etc., and prevents heat spot 4A. This will eliminate the negative effects of fuel on combustion and avoid deterioration in engine fuel efficiency and output performance. become.

[0023] In addition, when cooling the gaseous sodium 12A, the stopper 13 is made of a good thermal conductor. Therefore, heat is quickly conducted from the refrigerant chamber 11 side to the water jacket 9C side. As a result, the sodium 12 is properly cooled and the above-mentioned heat spot 4A is cooled. This has the effect of ensuring that the process is carried out reliably.

[0024] Next, the second embodiment of the sodium-filled internal combustion engine for cooling will be explained. The internal combustion engine differs from that of the first embodiment in the structure of the plug 14 as a heat transfer member. However, other than this, the structure is similar to that of the first embodiment.

[0025] Therefore, only the stopper 14 will be explained. This stopper 14 is also made of aluminum, for example. It is made of a good thermal conductor such as, but the surface 14A on the water jacket 9C side is It is formed in an uneven surface shape (shape with a jagged cross section) and is suitable for water jackets. The area exposed to the cooling water in port 9C has been significantly increased.

[0026] The second embodiment of the present invention is a sodium-filled internal combustion engine for cooling, as described above. In addition to the same functions and effects as the first embodiment, the water jacket of the stopper 14 is The surface 14A on the side of the socket 9C is formed into an uneven surface shape (a shape having a jagged cross section). Since the area exposed to the cooling water has been significantly increased, water can be removed from the refrigerant chamber 11 side. Heat is conducted more quickly to the data jacket 9C side, and the sodium 12 is appropriately cooled, and the above-mentioned heat spot 4A is more reliably cooled. effective.

[0027] Next, the sodium cooling internal combustion engine of the third embodiment will be explained. The internal combustion engine differs from the first and second embodiments in the structure of the plug 15 as a heat transfer member. Other than that, the configuration is similar to that of the first and second embodiments.

[0028] Therefore, only the stopper 15 will be explained. This stopper 15 is also made of aluminum, for example. It is made of a good thermal conductor such as, but the surface 15A on the water jacket 9C side is In addition to being formed with an uneven surface (shape with a jagged cross section), the cooling chamber The surface 15B on the 11 side is also formed in an uneven surface shape (a shape having a jagged cross section). Therefore, the area exposed to the cooling water inside the water jacket 9C has been significantly increased. In both cases, the exposed area of the cooling chamber 11 to sodium 12 or 12A is also significantly increased. ing.

[0029] The third embodiment of the present invention is a sodium-filled internal combustion engine for cooling, as described above. In addition to the same functions and effects as the first embodiment, both surfaces 15A of the stopper 15 , 15B are all formed in an uneven surface shape (shape with a jagged cross section) and are filled with cooling water and Since the area exposed to sodium 12 or 12A is greatly increased, Heat is conducted even more quickly from the refrigerant chamber 11 side to the water jacket 9C side. As a result, the sodium 12 is properly cooled and the above-mentioned heat spot 4A is cooled. This has the effect of making the process more reliable.

[0030] The structure that cools the heat spot by enclosing this cooling sodium is , as mentioned above, is not limited to the number and structure of intake valves, exhaust valves, and spark plugs installed. , can be applied to various types of reciprocating engines, and is also sufficient for other types of engines. It can be applied to heat spots that are difficult to cool with cooling water, such as between each valve. By appropriately applying a structure in which cooling sodium is sealed in the This eliminates the negative effects of combustion on engine combustion and avoids deterioration in engine fuel efficiency and output performance. Become.

[0031]

[Effect of the idea]

As detailed above, according to the sodium cooling internal combustion engine of the present invention, the combustion engine An internal combustion engine equipped with a combustion chamber and a water jacket that can cool the area around the combustion chamber. A refrigerant chamber is formed between the heat spot of the combustion chamber and the water jacket. liquid sodium that can cool the heat spot is sealed in the refrigerant chamber. This configuration reduces the heat in the combustion chamber, which conventionally could not be directly cooled with cooling water alone. The spot is now cooled through liquid sodium and pre-ignited. The negative effects on combustion caused by heat spots, such as the occurrence of ignition (early ignition), are eliminated. This has the advantage that deterioration in fuel efficiency and output performance of the engine can be avoided.

[0032] A heat conductor made of a good thermal conductor is installed between the refrigerant chamber and the water jacket. By interposing the heat transfer member, heat conduction from the refrigerant chamber side to the water jacket side is accelerated. This is done quickly to ensure that the sodium is properly cooled and cools the heat spots mentioned above. This has the effect of ensuring that the process is carried out reliably.

[0033] In addition, the surface of the heat transfer part between the refrigerant chamber and the water jacket is By forming an uneven surface that can promote Heat is quickly conducted to the jacket side, and the sodium is properly cooled. This has the effect of reliably cooling the heat spots described above.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a main part of a cooling sodium-filled internal combustion engine as a first embodiment of the present invention.

FIG. 2 is a diagram schematically showing a planar arrangement of main parts of a cooling sodium-filled internal combustion engine as a first embodiment of the present invention.

FIG. 3 is a sectional view of a main part of a cooling sodium-filled internal combustion engine as a second embodiment of the present invention;

FIG. 4 is a sectional view of a main part of a cooling sodium-filled internal combustion engine as a third embodiment of the present invention.

[Explanation of symbols]

1 cylinder block 1A cylinder bore 2 Cylinder head 3 Piston 4 Combustion chamber 4A heat spot 5 Intake passage 5A intake port 6 Exhaust passage 6A exhaust port 7 Intake valve 8 Exhaust valve 9A, 9B, 9C water jacket 10 Spark plug 11 Refrigerant room 12 Liquid sodium 12A gaseous sodium 13, 14, 15 Plug as heat transfer member 14A, 15A, 15B Stopper surface

Claims (3)

[Scope of utility model registration request] Claim 1: In an internal combustion engine equipped with a combustion chamber and a water jacket capable of cooling the surroundings of the combustion chamber, a refrigerant chamber is formed between a heat spot of the combustion chamber and the water jacket, and a refrigerant chamber is formed within the refrigerant chamber. A sodium-filled internal combustion engine for cooling, characterized in that liquid sodium that can cool the heat spot is sealed. 2. The sodium-filled internal combustion cooling device according to claim 1, wherein a heat transfer member made of a good thermal conductor is interposed between the refrigerant chamber and the water jacket. institution. 3. The cooling device according to claim 1, wherein an uneven surface capable of promoting heat conduction is formed on the surface of the heat transfer portion between the refrigerant chamber and the water jacket. Sodium-filled internal combustion engine.