JPH11324686A - Water-cooling after cooler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water-cooling after cooler which eliminates any possibility of damage by thermal strain stress, has a simple structure, and is low cost. SOLUTION: An intake connector 10 is fastened to an intake manifold attached to a cylinder head 12 by a bolt 13 via a gasket. A mounting eye 11 is provided in the intake passage of an intake connector 10 and a fitting flange 26 fixed to a heat exchanger main body 21 is fastened by a fitting bolt 31 via a spacer 30. The inside width W1 of the intake connector 10 is narrowed by the width W2 of the intake entrance part 27 of the heat exchanger main body 21. The difference of the heat strain between the fitting flange 26 and the intake connector 10 is absorbed by a spacer 30 and the fitting bolt 31 so as to cause no damage.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-cooled aftercooler for cooling intake air of an internal combustion engine.

[0002]

2. Description of the Related Art A water-cooled aftercooler of an internal combustion engine is provided to cool intake air to increase the filling rate of intake air into a cylinder and to increase the output of the internal combustion engine.
No. -19133. FIG. 9 is a side view of a water-cooled heat exchanger 20b for an aftercooler, and FIG. 10 is a plan view thereof. 9 and 10, an inlet pipe 22 and an outlet pipe 23 for cooling water are fixedly provided at the front and rear portions of the heat exchanger main body 21, and the cooling water flows through a tube 24. The mounting flanges 26b are staggered and welded to the left and right side plates 25, 25 of the heat exchanger body 21.
6b has a frame shape. The intake air, which has been compressed by the supercharger (not shown) and has a high temperature, has flowed in the vertical direction of the heat exchanger main body 21 as shown by the arrows,
It is cooled by the cooling water flowing inside 4 and contracts.

FIG. 11 is a side sectional view of a water-cooled aftercooler 1c. The intake pipe is constituted by an intake manifold 4c attached to a side surface of the internal combustion engine and a cover 50, and a mounting flange 26b of the heat exchanger body 21 is attached to the intake manifold 4c.
c and the cover 50 and fastened by bolts (not shown). Heat-resistant gaskets 51 are sandwiched between the upper and lower surfaces of the mounting flange 26b, the intake manifold 4c and the cover 50, respectively. Heat resistant gasket 5
Reference numeral 1 denotes a heat-resistant material using a wire mesh or carbon.
The intake air flows from a supercharger (not shown) as shown by an arrow, is cooled by the heat exchanger body 21, and flows into a cylinder (not shown).

[0004]

However, in the above configuration, the heat exchanger body 21 expands and contracts due to heat, and a large concentrated stress is generated at the welded portion with the mounting flange 26b, which is less likely to expand and contract due to heat, as shown in FIG. Cracks may be generated at the weld end P. In addition, the mounting flange 26b is large, the shape is complicated, the cost is high, and two heat-resistant gaskets 51 having a complicated structure and heat resistance are required.

The present invention has been made in view of the above problems, and has as its object to provide a simple and inexpensive water-cooled aftercooler that is free from damage due to thermal stress, does not require a complicated gasket having a complicated structure, and does not require a gasket. .

[0006]

In order to achieve the above object, a first invention of a water-cooled aftercooler according to the present invention is a water-cooled aftercooler having a water-cooled heat exchanger installed in an intake passage of an internal combustion engine. The aftercooler is characterized in that a mounting flange is fixed to a main body of the heat exchanger, and a mounting flange is detachably fixed to a mounting seat provided in an intake passage.

According to the first aspect of the invention, since the heat exchanger main body is attached to the mounting seat in the intake passage, the mounting seat has a shielding effect, and the intake air leaking outside without passing through the heat exchanger is eliminated. It becomes a stable water-cooled aftercooler.

A second invention is characterized in that, in the first invention, the mounting flange is fastened to the mounting seat by a mounting bolt via a spacer of a predetermined length.

According to the second aspect of the present invention, the bolt has a length corresponding to the length of the spacer, and even if mutual displacement occurs due to a difference in thermal expansion between the mounting seat and the mounting flange, the long bolt and spacer can be used. Absorbs displacement and does not overload each part. Therefore, occurrence of stress concentration can be prevented, and there is no possibility of breakage.

In a third aspect based on the first aspect, the width of the intake passage of the intake pipe adjacent to the intake port of the heat exchanger body is made smaller than the width of the intake port of the heat exchanger body. The width of the intake passage of the intake pipe close to the intake outlet of the exchanger body is made smaller than the width of the intake outlet of the heat exchanger body, or both.

According to the above configuration, since the width of the intake passage is smaller than the width of the intake port and / or the width of the intake port of the heat exchanger body, the amount of intake air passing outside the heat exchanger body is small. . For this reason, the cooling efficiency of the water-cooled aftercooler increases.

According to a fourth aspect of the present invention, in the first aspect, the intake passage is constituted by an intake manifold attached to a side surface of the cylinder head and an intake connector detachably attached to an upper portion of the intake manifold. The device is provided in the intake connector.

According to the above configuration, since the heat exchanger is provided in the intake connector attached to the upper portion of the intake manifold, the heat exchanger can be removed integrally with the intake connector when the heat exchanger is attached or detached. Good maintainability and assemblability.

According to a fifth aspect of the present invention, in a water-cooled aftercooler having a water-cooled heat exchanger provided in an intake passage of an internal combustion engine, an opening is provided on an outer surface of an intake manifold provided on a side surface of a cylinder head. It is characterized in that it is inserted into the intake manifold through the opening and attached, and the opening is closed with a cover.

According to the above configuration, the heat exchanger can be attached and detached simply by removing the cover, and the disassembly and assemblability are good, and the structure is simple and the cost is reduced.

A sixth invention is characterized in that, in the fifth invention, the intake manifold is made of aluminum die-cast.

According to the sixth aspect of the invention, since the intake manifold has an opening on the outer surface side, it can be easily manufactured by aluminum die-casting, thereby reducing costs.

According to a seventh aspect, in the fifth aspect, the cover (41) is made of a vibration damping member.

According to the seventh aspect, the cover is made of a damping member, which contributes to noise reduction.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a water-cooled aftercooler according to the present invention will be described below in detail with reference to FIGS.

FIG. 1 is a partial cross-sectional side view of a water-cooled aftercooler 1 according to a first embodiment, and FIG. 2 is a view taken along line AA of FIG. 1 and 2, the intake pipe 2 includes an intake manifold 4 attached to a cylinder head 3 of an internal combustion engine, and an intake connector 10 detachably attached to an upper portion of the intake manifold 4. You. The intake connector 10 is connected to a supercharger (not shown) by a connection pipe 15. Less than,
In the heat exchanger 20, the same members as those of the conventional heat exchanger shown in FIGS. 9 and 10 are denoted by the same reference numerals, and the description thereof will not be repeated. Only different parts will be described.

The left and right side plates 25, 2 of the heat exchanger body 21
5 are horizontally welded with mounting flanges 26, 26, respectively, and housed in the intake connector 10.
A cooling water inlet connector 5 is connected to a cooling water inlet pipe 22 fixed to the front and rear portions of the cooling water outlet 1, and a cooling water outlet connector 6 is connected to an outlet pipe 23.

FIG. 3 is a view taken in the direction of arrows BB in FIG. 1. The mounting seat 11 is provided in the intake passage of the intake connector 10, and the mounting flange 26 of the heat exchanger main body 21 is interposed through the spacer 30. It is fastened by the mounting bolt 31. The intake connector 10 is mounted on the intake manifold 4 via a gasket 12 made of a general material, and is fastened by bolts 13. The intake connector 10 includes a heat exchanger body 21.
The stepped portion 14 is provided in the vicinity of the intake inlet 27 of the heat exchanger main body 21.
Is set to be smaller than the outer width W2 of the intake port 27.
The gap S between the lower surface of the stepped portion 14 and the upper surface of the intake port 27 of the heat exchanger body 21 is a small value, for example, about 2 mm. The intake air from the turbocharger not shown flows as shown by the arrow,
It flows into the cylinder head 3 (not shown).

FIG. 4 is a detailed view of a portion C in FIG. The mounting flange 11 fixed to the heat exchanger body 21 is provided on the mounting seat 11 provided inside the intake connector 10 with the spacer 3.
It is fastened by the mounting bolt 31 through the “0”. The length of the spacer 30 is a predetermined length L.
The length is also longer.

According to the first embodiment, only one gasket 12 is required for the joint surface between the intake manifold 4 and the intake connector 10, and the cost can be reduced because it is a general material. Further, the inner width W1 of the stepped portion 14 provided on the intake connector 10 is made smaller than the outer width W2 of the heat exchanger body 21, and the gap S between the lower surface of the stepped portion 14 and the upper surface of the heat exchanger body 21 is reduced. Since the size is reduced, the intake air flowing as indicated by the arrow Y shown in FIG. 3 passes through the heat exchanger main body 21 and the amount of air leaking to the side surface thereof is small. Therefore, the cooling efficiency is good. Although not shown, the same effect can be obtained even if the inner width of the portion of the heat exchanger main body 21 of the intake manifold 4 close to the intake outlet 28 is smaller than the outer width of the heat exchanger main body 20. Further, the gap may be reduced both vertically and vertically.

The mounting flange 2 of the heat exchanger body 21
The length of the spacer 30 used for the fastening portion of No. 6 is a predetermined length L, and the bolt 31 is also long accordingly. Therefore, the position of the fastening portion generated due to the difference in thermal expansion between the intake connector 10 and the heat exchanger body 21. The deviation is absorbed. Therefore, the heat exchanger body 21
No large stress is generated at the welded portion between the mounting flange 26 and the mounting flange 26, and there is no possibility of breakage.

FIG. 5 shows a water-cooled aftercooler 1a according to a second embodiment.
FIG. An intake manifold 4a is integrally formed with the cylinder head 3, and an intake connector 10a is detachably attached to an upper portion thereof. The connection pipe 15 is connected to the intake connector 10a. A mounting seat 11 is provided in an intake passage of the intake manifold 4a, and a mounting flange 26 is provided.
The heat exchanger main body 21 is fastened by bolts 32 via.

According to the second embodiment, there is no need to provide the intake manifold 4a independently. Therefore, the cylinder head 3 becomes compact, and the size and weight of the internal combustion engine can be reduced, which contributes to cost reduction. Note that the heat exchanger 20 may be attached to the intake connector 10a side.

FIG. 6 shows a water-cooled aftercooler 1b according to the third embodiment.
, FIG. 7 is a plan partial cross-sectional view, and FIG.
It is DD sectional drawing of. 6, 7, and 8, an opening 40 is provided on the outer surface side of an intake manifold 4b made of aluminum die cast attached to a side surface of the cylinder head 3, and the opening 40 is formed of a damping steel plate. The cover 41 made of the vibration damping member is fastened and closed by the bolt 42. A heat exchanger 20a is inserted into the intake manifold 4b through an opening 40, and a mounting flange 26a vertically fixed to the inner side surface of the heat exchanger body 21 is attached to the intake manifold 4 by a mounting bolt 31 via a spacer 30. 4b. A laterally concave mounting plate 43 is fixedly provided on the outer surface side of the heat exchanger body 21, and upper and lower ends of the mounting plate 43 are horizontally fixed to the intake manifold 4b. It is fastened to 44 by bolts 32, 32 in the vertical direction. That is, the mounting bolts 31 and the bolts 32 are orthogonal to each other, and the mounting of the heat exchanger 20 is ensured. A cooling water inlet connector 5 and an outlet connector 6 are connected to the front and rear portions of the heat exchanger body 21. A connection pipe 15 is connected to an upper portion of the intake manifold 4b.
As shown in FIG. 6, a pair of ribs 45, 45 are provided on the intake manifold 4b above the front and rear ends of the heat exchanger main body 21, and as shown in FIG. The gap R between the cover and the cover 41 is reduced to reduce the leakage of intake air, and a large amount of intake air is passed through the heat exchanger body 21 to improve the cooling efficiency.

According to the third embodiment, the heat exchanger 20 can be easily attached and detached by removing the cover 41.
Maintenance and disassembly are improved. Intake manifold 4b
Is made of aluminum die-cast, which contributes to cost reduction. Further, since the cover 41 is made of a vibration damping member, it contributes to noise reduction.

[Brief description of the drawings]

FIG. 1 is a partial side sectional view of a water-cooled aftercooler of a first embodiment.

FIG. 2 is a view as viewed in the direction of arrows AA in FIG. 1;

FIG. 3 is a view taken in the direction of arrows BB in FIG. 1;

FIG. 4 is a detailed view of a portion C in FIG. 3;

FIG. 5 is a front sectional view of a water-cooled aftercooler of a second embodiment.

FIG. 6 is a partial side sectional view of a water-cooled aftercooler of a third embodiment.

FIG. 7 is a partial plan sectional view of a water-cooled aftercooler of a third embodiment.

FIG. 8 is a view as viewed in the direction of the arrow DD in FIG. 6;

FIG. 9 is a side view of a conventional heat exchanger.

FIG. 10 is a plan view of a conventional heat exchanger.

FIG. 11 is a front sectional view of a conventional water-cooled aftercooler.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water-cooled aftercooler 2 Intake pipe 4, 4a, 4b Intake manifold 10 Intake connector 11 Mounting seat 12 Gasket 14 Stepped portion 20, 20a Heat exchanger 21 Heat exchanger main body 25 Side plate 26, 26a Mounting flange 30 Spacer 31 Mounting bolt 40 Opening 41 Cover 43 Mounting plate 44 Bracket

Claims (7)

[Claims] In a water-cooled aftercooler having a water-cooled heat exchanger provided in an intake passage of an internal combustion engine, a mounting flange (26) is fixed to a main body (21) of the heat exchanger (20). A water-cooled aftercooler, characterized in that a mounting flange (26) is detachably fixed to a mounting seat (11) provided in the vehicle. 2. The water-cooled aftercooler according to claim 1, wherein the mounting flange (26) is fastened to the mounting seat (11) by a mounting bolt (31) via a spacer (30) having a predetermined length. Features a water-cooled aftercooler. 3. The water-cooled aftercooler according to claim 1, wherein the width of the intake passage of the intake pipe (2) close to the intake port (27) of the heat exchanger body (21) is adjusted by the width of the heat exchanger body (21). Inlet inlet
(27) and the width of the intake passage of the intake pipe (2) close to the intake outlet (28) of the heat exchanger body (21) should be smaller than that of the heat exchanger body (21). A water-cooled aftercooler, characterized in that either or both of the widths are smaller than the width of (28). 4. The water-cooled aftercooler according to claim 1, wherein the intake passage is detachably attached to an intake manifold (4) attached to a side surface of the cylinder head (3) and to an upper portion of the intake manifold (4). A water-cooled aftercooler comprising an intake connector (10) and a heat exchanger (20) provided in the intake connector (10). 5. A water-cooled aftercooler in which a water-cooled heat exchanger is provided in an intake passage of an internal combustion engine.
(3) An opening (40) is provided on the outer side of the intake manifold (4b) arranged on the side, and the heat exchanger (20) is inserted into the intake manifold (4b) through the opening (40) and taken out. A water-cooled aftercooler characterized in that it is worn and the opening (40) is closed by a cover (41). 6. A water-cooled aftercooler according to claim 5, wherein the intake manifold (4b) is made of aluminum die-cast. 7. The water-cooled aftercooler according to claim 5, wherein the cover (41) is made of a vibration damping member.