KR20160103735A - Clean engine easy to disassemble any cylinder head individually - Google Patents

Abstract

In the present invention, the cooling water can be discharged individually for each cylinder head of the cylinder, so that when the cylinder head is disassembled for engine maintenance, only the cooling water of the cylinder head requiring maintenance is discharged without discharging all the cooling water of the entire cylinder head. The present invention relates to a clean engine which can easily disassemble a cylinder head for each cylinder. A clean engine according to the present invention includes a cylinder liner (20) installed in a cylinder block (10) for every cylinder number; And a cylinder head (30) which is mounted for each cylinder liner (20) and in which a cooling water circulation passage (38) is formed; A cooling water discharge hole (40) is formed in the side surface of each of the cylinder heads (30) so that the cooling water circulation passage (38) inside is communicated with the outside; Closing plug 50 by opening and closing the outlet of the cooling water discharge hole 40 with the opening and closing plug 50 so that the cooling water in each cylinder head 30 can be independently discharged.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a clean engine,

[0001] The present invention relates to a clean engine which can easily disassemble a cylinder head for each cylinder, and more particularly, to a clean engine which is capable of discharging cooling water for each cylinder head separately for disassembling the cylinder head for engine maintenance, Which can be easily disassembled, by discharging only the cooling water of a cylinder head requiring maintenance without discharging the cylinder head.

In general, ship propulsion, offshore plant, and onshore plant have limited space for installation of engine structures, while additional space for additional structures and facilities, including platform structures for maintenance and repair of engines There is a difficulty.

For example, since the cargo loading space must first be secured on the ship, the space of the engine room for installing powertrain and platform structures such as the engine and the speed reducer must be narrowed, which is more so in the case of a small ship.

Therefore, modern and future engine facilities must solve the problems of improving the efficiency in terms of output and fuel efficiency, and reducing the size of the engine structure and the auxiliary facilities.

Particularly, where there is a narrow engine room space, such as a ship, which is shielded from the outside, the ease of assembly and maintenance of the engine and its accessories, and the prevention of fire and accident are also important.

In order to actively cope with these technical demands and customers' needs, the so-called 'Clean Engine' (C-Customer, L-Liability, E-Environment, A-Acceptable and N-No defect) It is a new concept engine introduced by.

In short, the clean engine maintains or even improves the engine efficiency in the same manner as the conventional engine, and provides engine assistance including the engine and the lubricant circulation system, the cooling water circulation system, the intake system, the exhaust system, the pump, the blower, The devices are reasonably reconstructed through modularization, integration, miniaturization and simplification, functionally enhancing the circulation or supply piping and passages of cooling water, lubricating oil and fuel, aligning them neatly and neatly together therewith, To simplify the internal and external structure of the engine, and to assemble, disassemble and maintain the structure including the engine and its accessories, and to keep the inside of the engine and the engine room clean at all times to provide a comfortable engine room for the operator Which is the engine that has been developed to be focused on.

From the viewpoint of the clean engine, the structure and maintenance of the conventional cylinder head and its surroundings will be described.

FIG. 1 is a view showing a structure of a conventional general engine.

Referring to FIG. 1, the engine has a cylinder block 10 having a length and a width for mounting a plurality of cylinders in accordance with the number of cylinders of the engine. A cylinder liner 20 corresponding to the number of cylinders is provided in the cylinder block 10, And a cylinder head 30 is mounted for each cylinder liner 20. [0050] As shown in Fig.

The cooling water flows in and flows into the cooling water chamber 12 between the cylinder block 10 and the cylinder liner 20 to cool the cylinder liner 20 and then flows into the cylinder liner 20, And flows into the cylinder head 30 through the plurality of cooling water passages 22 to cool the cylinder head 30 and form a cycle for returning to the cylinder head 30 again.

Since the cylinder head 30 abuts against the combustion chamber and provides the exhaust port, it directly receives the combustion heat and the exhaust gas heat from the combustion chamber, so that the cylinder head is provided with a cooling water circulation passage so as to always circulate the cooling water.

It is necessary to maintain the cylinder liner or the combustion chamber during the use of the engine or to repair the leakage between the cylinder head and the cylinder liner 20 or between the cylinder liner 20 and the cylinder block 10, There are many times when you need to raise.

Since the cylinder head 30 is formed as a separate component for each cylinder and is mounted independently for each cylinder, the cylinder head 30 is formed in a single body, Can be separated and assembled by cylinder.

Therefore, if the cylinder head to be lifted for maintenance is not the entire cylinder head but only one or only a few cylinder heads, it is only necessary to separate the cylinder.

However, since each cylinder head 30 is filled with cooling water, it is very inefficient to discharge the cooling water from the cooling water supply side and to empty the cooling water in the entire cylinder head before disassembling. That is, it takes a long time not only to discharge the cooling water in the entire cylinder head but also to prevent environmental pollution caused by the discharged cooling water and to fill the cooling water as much as the capacity of the entire cylinder after maintenance Occurs.

Particularly, in the case of an engine mounted on an independent transportation means such as a ship, there is a further problem that the processing and supply of cooling water are restricted.

Japanese Patent Application Laid-Open No. 10-2014-0128518 Patent Registration No. 10-1394767

The present invention has been developed in order to solve the above problems, and it is an object of the present invention to provide a cylinder head which can discharge the cooling water of the entire cylinder head without disassembling the cylinder head for engine maintenance, And which can be easily disassembled into a cylinder head for each cylinder.

In order to achieve the above object, a clean engine according to the present invention comprises a cylinder liner (20) provided for each cylinder number in a cylinder block (10); And a cylinder head (30) which is mounted for each cylinder liner (20) and in which a cooling water circulation passage (38) is formed; A cooling water discharge hole (40) is formed in the side surface of each of the cylinder heads (30) so that the cooling water circulation passage (38) inside is communicated with the outside; Closing plug 50 is detachably attached to the outside of the cooling water discharge hole 40 by an opening and closing plug 50 so that the inside of each cylinder head 30 can be independently discharged.

In the clean engine according to the present invention, it is preferable that the cooling water discharge hole (40) is formed so as to communicate with the lowest portion of the cooling water circulation passage (38).

In the clean engine according to the present invention, it is preferable that the opening / closing plug (50) is structured to be fastened to the cooling water discharge hole (40) by a screw connection so as to be easily detachable.

In the clean engine according to the present invention, the cylinder liner 20 has a structure in which an upper end protrudes above the cylinder block 10, and cooling water in the cooling water chamber 12 is supplied to the cooling water of the cylinder head 30 A plurality of helical cooling water passages 22 for sending cooling water to the circulation passage 38 are formed and the bottom surface of the cylinder head 30 is seated on the upper surface of the cylinder liner 20 so that the side surface is exposed to the outside, It is preferable that the side surface portion of the cylinder head 30 corresponding to the lowermost level line corresponding to the lowermost portion of the passage 38 is exposed to the outside as it is.

According to the clean engine according to the present invention, since the cooling water discharge holes are formed for each cylinder head of each cylinder and the membrane is detachably attachable and detachable by the opening and closing plug,

When only one or only a few cylinder heads need to be disassembled for engine maintenance, only the opening / closing plug of the corresponding cylinder head can be separated and only the cooling water of the necessary cylinder head can be discharged.

Accordingly, it is possible to perform the maintenance quickly, simply, and cleanly by discharging only the cooling water of the cylinder head requiring maintenance without discharging all the cooling water of the entire cylinder head, thereby preventing the waste of the cooling water, The problem can be reduced.

1 is a sectional view showing a structure of a conventional engine.
2 is a cross-sectional view of a main portion showing a clean engine according to the present invention.
3 is an enlarged view of the cooling water discharge plug portion of FIG.

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

2 is a cross-sectional view of a main portion of a clean engine according to the present invention. The same reference numerals are given to the same parts as in Fig.

2, the clean engine has a cylinder block 10 having a length and a width for mounting a plurality of cylinders in accordance with the number of cylinders of the engine. In the cylinder block 10, a plurality of A cylinder liner 20 is provided, and a cylinder head 30 is mounted for each cylinder liner 20. [

The cylinder head 30 is provided with an intake port 32 as a passage through which the intake air flows and an exhaust port 34 as a passage through which the exhaust gas is discharged is formed and the injection valve 36 And a cooling water circulation passage 38 in which cooling water circulates is formed inside.

The engine cooling water is introduced into the cooling water chamber 12 between the cylinder block 10 and the cylinder liner 20 to cool the body of the cylinder liner 20 and then flows through the cooling water passage 22 toward the cylinder head 30 Cooling the upper portion of the cylinder liner 20, entering the cylinder head 30, cooling the coolant circulating passage 38, and returning to a cycle.

The cooling water circulation passage 38 of the cylinder head 30 is provided with a portion which is greatly affected by the combustion heat and the exhaust gas heat such as around the exhaust port 30 and around the injection valve 36 and around the combustion chamber So as to properly surround the entire cylinder head 30.

Fig. 3 is an enlarged view of the cooling water discharge plug portion of Fig. Refer to FIG. 2 in parallel.

2 and 3, a cooling water discharge hole 40 is formed in the side surface of each cylinder head 30 so as to allow the inside cooling water circulation passage 38 to communicate with the outside.

The cooling water in the cooling water circulation passage 38 of the cylinder head 30 can be discharged to the outside through the cooling water discharge hole 40. [

The outside outlet of the cooling water discharge hole (40) prevents the opening / closing plug (50) detachably. As the cooling water in the cooling water circulation passage 38 escapes when the opening / closing plug 50 is opened, the cooling water in each cylinder head 30 can be independently discharged.

The cooling water discharge hole (40) is formed so as to communicate with the lowest portion of the cooling water circulation passage (38). With this configuration, the cooling water circulating passage 38 can be discharged without any remaining cooling water.

The lowest portion of the cooling water circulation passage 38 is the lowest water level (indicated as 'Water Level' in FIG. 2) at which the cooling water circulates in the cooling water circulation passage 38. Therefore, by connecting the cooling water discharge hole 40 to the lowest portion of the cooling water circulation passage 38, the cooling water can be discharged into the cooling water discharge hole 40 without remaining in the cooling water circulation passage 38.

The opening / closing plug (50) and the cooling water discharge hole (40) are screwed together by the screw portion (42). With this configuration, it is easy to separate the fastening block of the opening / closing plug 50 and the airtightness can be sufficiently maintained.

On the other hand, Fig. 2 shows a structure of a clean engine for smoothly structuring the cooling water discharge structure by the cooling water discharge hole 40 and the opening and closing plug 50. As shown in Fig.

2 is a structure in which the cylinder liner 20 is mounted on the cylinder block 10 and the bottom surface of the cylinder head 30 is directly mounted on the upper surface of the cylinder liner 20. [ This structure does not require a separate water jacket (Water Jacket).

This structure is in contrast to the type of engine with a water jacket. The engine having the water jacket is the same as the engine shown in Fig. 1 of Patent Document 2. The water jacket is mounted on the upper surface of the cylinder block to cover the upper portion of the cylinder liner and the lower portion of the cylinder head. In this case, the cooling water circulates through the chamber between the water jacket and the cylinder block, then flows through the cooling water passage formed in the upper portion of the cylinder liner, then enters the space between the water jacket and the outer surface of the cylinder head, And enters the cooling water passage of the cylinder head through a separate inflow hole formed on the outer periphery of the portion.

2 is a structure in which the cylinder liner 20 is mounted on the cylinder block 10 and the bottom surface of the cylinder head 30 is directly seated on the upper surface of the cylinder liner 20 It is a form excluding water jacket.

A plurality of so-called " spiral " shaped cooling water passages 22 for directly connecting the cooling water chamber 12 and the cooling water circulation passages 38 of the cylinder head 30 to the protruding portions of the cylinder liner 20 .

According to this configuration, the bottom surface of the cylinder head 30 is seated on the upper surface of the cylinder liner 20, and the side surface is exposed to the outside. According to this structure, the side surface portion of the cylinder head 30 corresponding to the lowermost level line ("Water Level" in FIG. 2) corresponding to the lowermost portion of the cooling water circulation passage 38 is exposed to the outside as it is, Closing plug 50 and the opening and closing plug 50 are exposed to the outside of the side surface of the cylinder head 30 so that opening and closing operations of the opening and closing plug 50 and discharging of the cooling water are smoothly performed without interfering with other components, And there is no problem of contamination.

The foregoing is a description of certain preferred embodiments of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, .

10: Cylinder block
12: Cooling water chamber
20: Cylinder liner
22: cooling water passage
30: Cylinder head
32: Intake port
34: Exhaust port
36: injection valve
38: cooling water circulation passage
40: Cooling water discharge hole
42:
50: opening and closing plug

Claims (4)

A cylinder liner (20) installed in the cylinder block (10) for every cylinder number;
And a cylinder head (30) which is mounted for each cylinder liner (20) and in which a cooling water circulation passage (38) is formed;
A cooling water discharge hole (40) is formed in the side surface of each of the cylinder heads (30) so that the cooling water circulation passage (38) inside is communicated with the outside;
And the cooling water outlet hole of the cooling water discharge hole 40 is detachably attached to and detached from the opening and closing plug 50 so that the opening and closing plug 50 is opened so that the cooling water in each cylinder head 30 can be independently discharged. Clean engine with easy disassembly of cylinder head by cylinder. The method according to claim 1,
Wherein the cooling water discharge hole (40) is formed to communicate with the lowest portion of the cooling water circulation passage (38). The method according to claim 1,
Wherein the opening / closing plug (50) is detachably fastened to the cooling water discharge hole (40) by a screw connection. The method according to claim 1,
The cylinder liner 20 includes a plurality of cooling water circulation passages 38 for directly connecting the cooling water chamber 12 and the cooling water circulation passage 38 of the cylinder head 30 to the protruding portion, The bottom surface of the cylinder head 30 is seated on the upper surface of the cylinder liner 20 so that the side surface is exposed to the outside and the lowest level line corresponding to the lowest portion of the cooling water circulation passage 38 Wherein the side surface of the cylinder head (30) is exposed to the outside as it is.

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