JP2019120182A - engine - Google Patents

Abstract

To provide an engine in which a fluid cooling device is hardly restricted on its arrangement.SOLUTION: The engine comprises a fluid conduit 1 through which a temperature-raised fluid 1a of the engine passes, and a heat pipe 2. The heat pipe 2 comprises a heat input portion 2a formed at one end side and receiving heat of the fluid conduit 1, and a heat radiation portion 2b formed at the other end side and radiating the heat received at the heat input portion 2a. The engine comprises further comprises as the fluid conduit 1 cooled by the heat pipe 2, an engine oil conduit 4 returning an engine oil 4a having cooled a bearing 3a of a supercharger 3 to an oil pan 5 side, and a supercharged air conduit 5. The heat pipe 2 is composed of a surrounding cylinder 6 surrounding the fluid conduit 1, and a tube 7 led out from the surrounding cylinder 6. The surrounding cylinder 6 provides the heat input portion 2a, and the led-out end of the tube 7 provides the heat radiation portion 2b.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an engine, and more particularly, to an engine that is less subject to the arrangement of fluid cooling devices.

  BACKGROUND Conventionally, there are engines provided with an oil cooler and an intercooler as fluid cooling devices (see, for example, Patent Documents 1 and 2).

JP, 2011-196336, A (refer to Drawing 5) JP, 2015-86815, A (refer to Drawing 1)

<< Problems >> The restriction on the arrangement of the fluid cooling device is large.
In the engine of Patent Document 1, an oil cooler is used as the fluid cooling device, but the oil cooler needs to be disposed on the oil passage and on the engine cooling air blowing passage, and the disposition of the fluid cooling device The above restrictions are large.
In the engine of Patent Document 2, the intercooler is used as the cooling device, but the intercooler needs to be disposed on the supercharged air passage and on the engine cooling air blowing passage, and the arrangement of the fluid cooling device The restriction of

  An object of the present invention is to provide an engine in which the fluid cooling device is not subject to the restriction on the arrangement.

The specific matters of the invention according to claim 1 are as follows.
As illustrated in FIG. 1 (A) to (D) and FIG. 5 (A) to (D), it is provided with a fluid conduit (1) through which the temperature raising fluid (1a) of the engine passes, and a heat pipe (2) The heat pipe (2) has a heat input portion (2a) at one end side receiving heat of the fluid conduit (1) and a heat radiation portion (2b) at the other end side for radiating the heat received at the heat input portion (2a) An engine characterized by having.

(Invention of claim 1)
The invention according to claim 1 has the following effects.
<< Effect >> The fluid cooling device is not subject to the restriction on the arrangement.
The heat input part (2a) of the heat pipe (2) to be the fluid cooling device is disposed at an arbitrary position of the fluid conduit (1) to be the high temperature part, and the heat release part (2b) of the heat pipe (2) It is only necessary to place it at any low temperature part away from the part, and the fluid cooling device is not subject to the restriction on the arrangement.

FIG. 1 (A) is a longitudinal sectional view of an oil cooling device, and FIG. 1 (B) is a cross-sectional view taken along the line B-B of FIG. 1 (A), according to a first embodiment of the present invention. FIG. 1 (C) is a cross-sectional plan view of the supercharging air cooling device, and FIG. 1 (D) is a cross-sectional view taken along line D-D of FIG. 1 (C). FIG. 2 is a side view of an engine equipped with the oil cooler of FIG. 1 and a supercharged air cooler. FIG. 3 is a plan view of the engine of FIG. 2; It is a front view of the engine of FIG. It is a schematic diagram explaining the engine which concerns on 2nd Embodiment of this invention, FIG. 5 (A) is a longitudinal cross-sectional view of an oil cooling device, FIG.5 (B) is a BB sectional drawing of FIG.5 (A), FIG. 5C is a cross-sectional plan view of the supercharging air cooling device, and FIG. 5D is a cross-sectional view taken along the line D-D of FIG. 5C.

  1 to 4 illustrate an engine according to a first embodiment of the present invention, and FIG. 5 illustrates an engine according to a second embodiment of the present invention. Both embodiments describe a water-cooled vertical in-line multi-cylinder diesel engine.

First, the first embodiment will be described.
The outline of this engine is as follows.
As shown in FIGS. 2 to 4, this engine has a cylinder block (13) and a cylinder head (14) assembled on top of the cylinder block (13), with the installation direction of the crankshaft (12) as the front and back direction. A cylinder head cover (15) assembled to the upper part of the cylinder head (14), a front case (16) assembled to the front of the cylinder block (13), and a water pump formed on the front case (16) (17), an engine cooling fan (18) provided at the front of the water pump (17), a radiator (19) disposed in front of the engine cooling fan (18), and a rear of the cylinder block (13) A flywheel housing (20) assembled to the cylinder block (13), an oil pan (10) assembled to the lower portion of the cylinder block (13), and a suction assembled to one side of the cylinder head (14). A manifold (23) includes an exhaust manifold assembled next to the other side of the cylinder head (14) (21), mounted to the upper portion of the exhaust manifold (21) turbocharger (3).

As shown in FIGS. 1 (A) to 1 (D), this engine is provided with a fluid conduit (1) through which the temperature-raising fluid (1a) of the engine passes, and a heat pipe (2). The heat input part (2a) of one end side which receives the heat of the fluid conduit (1) and the heat radiation part (2b) of the other end side which radiates the heat received by the heat input part (2a) are provided.
This engine has the following advantages:
The heat input part (2a) of the heat pipe (2) to be the fluid cooling device is disposed at an arbitrary position of the fluid conduit (1) to be the high temperature part, and the heat release part (2b) of the heat pipe (2) It is only necessary to place it at any low temperature part away from the part, and the fluid cooling device is not subject to the restriction on the arrangement.
As shown in FIGS. 2 to 4, the heat radiating portion (2 b) of the heat pipe (2) is disposed at the low temperature portion on the front side of the radiator (19). As shown to FIG. 1 (A) (C), the radiation fin (24) is provided in the thermal radiation part (2b) of a heat pipe (2).

As shown in FIGS. 1 (A) and 1 (B), this engine is used as a fluid conduit (1) cooled by the heat pipe (2), a bearing (3a) of the turbocharger (3) shown in FIGS. The engine oil conduit (4) returns the cooled engine oil (4a) to the oil pan (10) side.
This engine has the following advantages:
The heat pipe (2) can easily cool the high temperature engine oil (4a) without using an oil cooler.

As shown in FIG. 1 (C) (D), this engine is provided with a supercharged air conduit (5) as a fluid conduit (1) to be dissipated by the heat pipe (2).
In this engine, the heat pipe (2) can easily cool the high-temperature supercharged air (5a) without the intercooler.
As shown in FIGS. 2 to 4, the supercharging air conduit (5) is a metal pipe disposed between the turbocharger (3) and the intake manifold (23).

As shown in FIGS. 1 (A) to 1 (D), the heat pipe (2) includes a surrounding cylinder (6) surrounding the fluid conduit (1) and a tube (7) drawn from the surrounding cylinder (6). The inside of the surrounding cylinder (6) is made into a heat input part (2a), and the lead-out end of the tube (7) is made into a heat radiation part (2b).
In this engine, the heat of the fluid conduit (1) is received in the surrounding cylinder (6), and the cooling efficiency of the temperature raising fluid (1a) is high.

  The heat pipe (2) comprises a metal container forming the outer wall, a working liquid (22) sealed under a reduced pressure in the container, and a liquid reflux wick formed on the inner surface of the container, and the fluid conduit (1) The working liquid (22) boils by the heat input to the heat input part (2a) of the heat pipe (2), and the vapor (22a) of the working liquid (22) deprived of the evaporation heat from the heat input part (2a) Heat flows into the heat radiating portion (2b), the vapor (22a) condenses in the heat radiating portion (2b), condensation heat is released in the heat radiating portion (2b), and heat transfer causes the temperature rising fluid (passing through the fluid conduit (1) Cooling of 1a) is performed. The working liquid (22) condensed in the heat radiation part (2b) returns to the heat input part (2a) by the capillary phenomenon of the liquid reflux wick. A metal mesh is used for the liquid reflux wick.

As shown in FIGS. 1 (B) and 1 (D), the peripheral wall of the enclosed portion (11) of the fluid conduit (1) surrounded by the surrounding cylinder (6) is alternately folded back and forth along the circumferential direction It is made of cocoon (8).
In this engine, the peripheral wall of the surrounding portion (11) formed by the weir (8) has a large surface area, and the heat input efficiency from the fluid conduit (1) to the heat input portion (2a) of the heat pipe (2) is high. .

Next, a second embodiment will be described.
As shown in FIGS. 5A to 5D, in this engine, the heat pipe (2) is composed of the tube (7), and one end of the tube (7) in contact with the fluid conduit (1) receives heat. It is a part (2a), and the other end of the tube (7) is a heat dissipating part (2b).
In this engine, the fluid cooling device can be easily manufactured using the existing heat pipe (2) of the general structure.

As shown in FIGS. 5A to 5D, in this engine, the circumferential wall of the to-be-contacted portion (9) of the fluid conduit (1) in contact with the heat input portion (2a) of the tube (7) is circumferentially It is formed by the weir (8) alternately folded back and forth along the length, and the heat input parts (2a) of the plural tubes (7) are fitted in the plural grooves (8a) of the weir (8).
In this engine, the peripheral wall of the contact portion (9) formed by the weir (8) has a large surface area, and the heat input efficiency from the fluid conduit (1) to the heat input portion (2a) of the heat pipe (2) is high. .

  The other structure of the second embodiment is the same as that of the first embodiment, and in FIGS. 5A to 5D, the same elements as those of the first embodiment are shown in FIGS. 1A to 1D. The same reference numerals are attached.

(1) Fluid conduit
(1a) Heated fluid
(2) Heat pipe
(2a) Heat input
(2b) Heat dissipation unit
(3) Turbocharger
(3a) Bearing
(4) Engine oil conduit
(4a) Engine oil
(5) Supercharged air conduit
(5a) Supercharged air
(6) Go cylinder
(7) Tube
(8) 襞
(8a) Groove
(9) Contacted part
(10) Oil pan
(11) Covered area

Claims (7)

  The heat pipe (2) is provided with a fluid pipe (1) through which the temperature raising fluid (1a) of the engine passes, and the heat pipe (2) receives the heat of the fluid pipe (1) An engine comprising: a heat dissipating portion (2b) on the other end side for dissipating heat received by the heat input portion (2a). In the engine according to claim 1,
As a fluid conduit (1) cooled by the heat pipe (2), an engine oil conduit (4) for returning the engine oil (4a) obtained by cooling the bearing (3a) of the turbocharger (3) to the oil pan (10) side An engine characterized by having. In the engine described in claim 1 or claim 2,
An engine characterized in that it has a supercharged air conduit (5) as a fluid conduit (1) which is dissipated by a heat pipe (2). In the engine according to any one of claims 1 to 3,
The heat pipe (2) is composed of a surrounding cylinder (6) for surrounding the fluid conduit (1) and a tube (7) led out from the surrounding cylinder (6), and the inside of the surrounding cylinder (6) is a heat receiving portion (6) An engine characterized by 2a), wherein the lead-out end of the tube (7) is used as a heat radiating portion (2b). In the engine according to claim 4,
The peripheral wall of the enclosed portion (11) of the fluid conduit (1) surrounded by the surrounding cylinder (6) is characterized in that it is formed by folds (8) alternately folded back and forth along the circumferential direction And an engine. In the engine according to any one of claims 1 to 3,
The heat pipe (2) is composed of a tube (7), one end of the tube (7) in contact with the fluid conduit (1) is the heat input portion (2a), and the other end of the tube (7) is a heat dissipation portion An engine characterized by (2b). In the engine according to claim 6,
The peripheral wall of the contact portion (9) of the fluid conduit (1) with which the heat input portion (2a) of the tube (7) contacts is formed of weirs (8) alternately folded back and forth along the circumferential direction An engine characterized in that the heat input parts (2a) of the plurality of tubes (7) are fitted in the plurality of grooves (8a) of (8).

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