JP2013079589A - Air cooler for internal combustion engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air cooler for an internal combustion engine, the air cooler which facilitates valve operation for adjusting the moisture of air, and can eliminate such erroneous operation that all valves are fully opened.SOLUTION: When cooling air, a first exhaust pipe 21 is brought into a closed state by a changeover valve 30, and cooling water sequentially flows through a first space S1, going path piping 16, a third space S3, return path piping 17 and a second space S2, and is discharged from a second exhaust pipe 22 with the second exhaust pipe 22 set in an opened state. When not cooling the air, a first exhaust pipe 21 is brought into an opened state by the changeover valve 30, and the cooling water flows through the first space S1 and is discharged from the first exhaust pipe 21 with the second exhaust pipe 22 set in a closed state.

Description

  The present invention relates to an air cooler for an internal combustion engine such as a diesel engine or a gas engine used for a ship or the like.

  Conventionally, as an air cooler for an internal combustion engine, as shown in FIG. 3, a cooler body 102 that passes air is provided in the middle of an air passage 101 that supplies air from a supercharger to a cylinder. There is one in which a cooling water pipe 103 is arranged in the main body 102 (see JP 2002-21653 A).

  The cooling water pipe 103 is provided with a bypass pipe 104 that connects the inlet side and the outlet side of the cooler body 102. A first butterfly valve 111 is provided in the middle of the bypass pipe 104, and the cooling water pipe 103 is provided. The second butterfly valve 112 is provided on the outlet side of the cooler main body 102 and on the upstream side of the position where the bypass pipe 104 is connected.

  The temperature of the air passing through the cooler body 102 is changed by changing the opening degree of the first and second butterfly valves 111 and 112 and changing the amount of the coolant flowing through the coolant pipe 103 in the cooler body 102. Was adjusting.

  However, in the conventional air cooler for an internal combustion engine, the temperature of the air passing through the cooler body 102 is adjusted by the opening degree of the first and second butterfly valves 111 and 112. It was necessary to operate the two butterfly valves 111 and 112 for temperature adjustment, and the valve operation was complicated. Further, due to an erroneous operation, the two butterfly valves 111 and 112 may be fully closed, and the cooling water may not flow through the cooling water pipe 103.

JP 2002-21653 A

  SUMMARY OF THE INVENTION An object of the present invention is to provide an air cooler for an internal combustion engine that makes it easy to operate a valve for adjusting the temperature of air and eliminates erroneous operations such as fully closing all valves. It is in.

In order to solve the above problems, an air cooler for an internal combustion engine according to the present invention includes:
An air supply line through which air supplied from the supercharger to the cylinder passes;
A first water chamber portion attached to the air supply conduit and having first and second spaces separated from each other;
A second water chamber portion attached to the air supply conduit and having a third space inside;
A plurality of forward pipings arranged inside the air supply conduit and communicating the first space and the third space;
A plurality of return pipes that are arranged inside the air supply pipe line and communicate with the second space and the third space;
A supply pipe that communicates with the first space and supplies cooling water to the first space;
A first discharge pipe communicating with the first space and discharging cooling water from the first space;
A second discharge pipe communicating with the second space and discharging cooling water from the second space;
It is attached to the first discharge pipe and the second discharge pipe, and the switching of the first discharge pipe from the open state to the closed state is linked with the switching of the second discharge pipe from the closed state to the open state. A switching valve that can be operated, or can be operated in conjunction with switching of the first discharge pipe from the closed state to the open state and switching of the second discharge pipe from the open state to the closed state; It is characterized by that.

  According to the air cooler for an internal combustion engine of the present invention, when cooling the air passing through the air supply conduit, the switching valve switches the first exhaust pipe from the open state to the closed state and the second exhaust pipe. Operate in conjunction with switching from the closed state to the open state. Thereby, the cooling water supplied from the supply pipe flows in order through the first space, the forward pipe, the third space, the return pipe, and the second space, and is discharged from the second discharge pipe. Then, the air is cooled in contact with the forward piping and the backward piping through which the cooling water flows.

  On the other hand, when the air passing through the air supply pipe is not cooled, the switching valve interlocks the switching of the first discharge pipe from the closed state to the open state and the switching of the second discharge pipe from the open state to the closed state. To operate. Thereby, the cooling water supplied from the supply pipe flows through the first space and is discharged from the first discharge pipe. That is, since the cooling water does not flow through the outward piping and the backward piping, the air is not cooled.

  Thus, in order to adjust the temperature of the air passing through the air supply conduit, only one switching valve needs to be operated, and the valve operation becomes easy. Further, by switching one switching valve, switching between the closed state of the first discharge pipe and the open state of the second discharge pipe, or switching between the open state of the first discharge pipe and the closed state of the second discharge pipe is performed. It is possible to eliminate the erroneous operation of fully closing or fully opening both the first discharge pipe and the second discharge pipe.

  According to the air cooler for an internal combustion engine of the present invention, the switching valve switches between the open state of the first discharge pipe to the closed state and the switch of the second discharge pipe from the closed state to the open state. It is possible to operate in conjunction with each other, or it is possible to operate in conjunction with switching from the closed state of the first discharge pipe to the open state and switching of the second discharge pipe from the open state to the closed state. Valve operation for adjusting the temperature of air can be easily performed, and erroneous operations such as fully closing all valves can be eliminated.

It is sectional drawing which shows the air cooler for internal combustion engines of this invention. It is a front view of a switching valve. It is a block diagram which shows the conventional air cooler for internal combustion engines.

  Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

  FIG. 1 is a sectional view showing an embodiment of an air cooler for an internal combustion engine according to the present invention. This air cooler is applied to internal combustion engines such as diesel engines and gas engines used in ships and the like.

  As shown in FIG. 1, the air cooler 1 is provided in the middle of an air supply duct 4 that supplies air from the supercharger 2 to the cylinder 3, and cools the air supplied to the cylinder 3. The air cooler 1 has an air supply line 10 through which air supplied from the supercharger 2 to the cylinder 3 passes.

  One intake opening 10a in the direction of the axis 10c of the air supply line 10 communicates with the air supply duct 4 on the supercharger 2 side, and the other discharge opening 10b in the direction of the axis 10c of the air supply line 10 is on the cylinder 3 side. The air supply duct 4 is communicated.

  A first water chamber portion 11 and a second water chamber portion 12 are attached to the outside of the side wall 15 of the air supply conduit 10 at positions facing each other. The first water chamber portion 11 and the second water chamber portion 12 are each formed in a cup shape and have a space between the side wall 15 of the air supply conduit 10.

  The first water chamber part 11 has a partition plate 13 on the inner surface, and the partition plate 13 partitions the internal space of the first water chamber part 11 into a first space S1 and a second space S2. Yes. The second water chamber portion 12 has a third space S3 therein.

  A plurality of forward piping 16 and return piping 17 are arranged inside the air supply conduit 10. The forward piping 16 and the return piping 17 extend in a direction orthogonal to the axis 10 c of the air supply conduit 10.

  The outgoing pipe 16 is attached through the side wall 15 to which the first water chamber part 11 is attached and the side wall 15 to which the second water chamber part 12 is attached, and the first space S1 and the third space S3. Communicate.

  The return pipe 17 is attached through the side wall 15 to which the first water chamber part 11 is attached and the side wall 15 to which the second water chamber part 12 is attached, and includes the second space S2 and the third space S3. Communicate.

  A supply pipe 20, a first discharge pipe 21 and a second discharge pipe 22 are attached to the first water chamber portion 11. The supply pipe 20 communicates with the first space S1 and supplies cooling water to the first space S1. As the cooling water, for example, seawater or fresh water is used.

  The first discharge pipe 21 communicates with the first space S1 and discharges the cooling water from the first space S1. The second discharge pipe 22 communicates with the second space S2 and discharges the cooling water from the second space S2. The first discharge pipe 21 and the second discharge pipe 22 are connected to the third discharge pipe 23 on the downstream side.

  One switching valve 30 is attached to the first discharge pipe 21 and the second discharge pipe 22. The switching valve 30 can be operated in conjunction with the switching of the first discharge pipe 21 from the open state to the closed state and the switching of the second discharge pipe 22 from the closed state to the open state. The switching from the closed state to the open state of the tube 21 and the switching from the open state to the closed state of the second discharge tube 22 can be operated in conjunction with each other.

  As shown in FIG. 2, the switching valve 30 is supported by the main body 35, the first opening / closing plate 31 and the second opening / closing plate 32, and the main body 35, and the first opening / closing plate 31 and the second opening / closing plate. And a control lever 34 fixed to one end of the shaft 33 in the axial direction.

  The main body 35 has a first cylinder part 35a and a second cylinder part 35b connected in parallel. A first opening / closing plate 31 is disposed in the first tube portion 35a, and a second opening / closing plate 32 is disposed in the second tube portion 35b.

  The shaft 33 is mounted in the main body 35 so as to coincide with the series direction of the first opening / closing plate 31 and the second opening / closing plate 32. Both ends of the shaft 33 are supported by the main body 35 so as to be capable of rotating by 90 °.

  The first opening / closing plate 31 and the second opening / closing plate 32 are fixed to the shaft 33 with an angular phase of 90 °. That is, the first opening / closing plate 31 and the second opening / closing plate 32 are disposed so as to be orthogonal to each other when viewed from the axial direction of the shaft 33.

  The operation lever 34 is fixed to the end of the shaft 33 on the side where the second opening / closing plate 32 is fixed. The operation lever 34 rotates the shaft 33 around the axis of the shaft 33. That is, by rotating the operation lever 34 in one direction, the first cylinder portion 35 a is closed by the first opening / closing plate 31, and the second cylinder portion 35 b is opened by the second opening / closing plate 32. On the other hand, by rotating the operation lever 34 in the other direction, the first cylinder part 35 a is opened by the first opening / closing plate 31, and the second cylinder part 35 b is closed by the second opening / closing plate 32.

  Thus, the switching valve 30 has a structure in which so-called two butterfly valves are connected in series.

  As shown in FIGS. 1 and 2, the first cylinder part 35a of the switching valve 30 is connected to the middle of the first discharge pipe 21, and the second cylinder part 35b of the switching valve 30 is connected to the second discharge pipe. Connected in the middle of the tube 22. That is, the first opening / closing plate 31 of the switching valve 30 opens and closes the first discharge pipe 21, and the second opening / closing plate 32 of the switching valve 30 opens and closes the second discharge pipe 22.

  Next, the operation of the air cooler 1 will be described.

  As shown in FIG. 1, the air is supplied from the supercharger 2 to the cylinder 3 through the air supply line 10 as indicated by the white arrow. When this air is cooled by the air cooler 1, the operation lever 34 of the switching valve 30 is manually rotated in one direction so that the first cylindrical portion 35a is closed by the first opening / closing plate 31, In addition, the second cylindrical portion 35 b is opened by the second opening / closing plate 32. That is, the first discharge pipe 21 is closed and the second discharge pipe 22 is opened by the switching valve 30.

  As a result, the cooling water supplied from the supply pipe 20 flows through the first space S1, the forward pipe 16, the third space S3, the return pipe 17 and the second space S2 in order, as indicated by solid arrows. And is discharged from the second discharge pipe 22. Then, the air comes into contact with the forward piping 16 and the backward piping 17 through which the cooling water flows, and is cooled.

  On the other hand, when the air cooler 1 does not cool the air, the operation lever 34 of the switching valve 30 is manually rotated in the other direction, so that the first cylindrical portion 35a is opened by the first opening / closing plate 31, In addition, the second cylindrical portion 35 b is closed by the second opening / closing plate 32. That is, the first discharge pipe 21 is opened and the second discharge pipe 22 is closed by the switching valve 30.

  As a result, the cooling water supplied from the supply pipe 20 flows through the first space S1 and is discharged from the first discharge pipe 21 as indicated by the dotted arrow. That is, since the cooling water does not flow through the forward piping 16 and the return piping 17, the air is not cooled.

  Actually, in order to adjust the temperature of the air supplied to the cylinder 3 to an appropriate temperature, the opening degree of the switching valve 30 is changed, and the amount of the cooling water flowing through the forward piping 16 and the backward piping 17 is changed. More specifically, the first opening / closing plate 31 and the second opening / closing plate 32 of the switching valve 30 are in a half-open state, and the cooling water flows through the first discharge pipe 21 as indicated by solid arrows and dotted arrows in FIG. And it is made to discharge from the 2nd discharge pipe 22. The ratio of the amount of cooling water discharged from the first discharge pipe 21 and the amount of cooling water discharged from the second discharge pipe 22 is determined by the opening degree of the first opening / closing plate 31 and the second opening / closing plate 32. By adjusting, the amount of the cooling water flowing through the forward pipe 16 and the backward pipe 17 is adjusted, and the temperature of the cooled air that has contacted the forward pipe 16 and the backward pipe 17 is adjusted.

  Thus, in order to adjust the temperature of the air passing through the air cooler 1, it is only necessary to operate one switching valve 30, and the valve operation is facilitated. Further, by operating one switching valve 30, switching between the closed state of the first discharge pipe 21 and the open state of the second discharge pipe 22, or the open state of the first discharge pipe 21 and the closing of the second discharge pipe 22 is performed. The state can be switched, and the erroneous operation of fully closing or fully opening both the first discharge pipe 21 and the second discharge pipe 22 can be eliminated.

  Further, the switching valve 30 opens the first discharge pipe 21 and closes the second discharge pipe 22 immediately after the start of the internal combustion engine or when the load remains low. That is, immediately after the start of the internal combustion engine or when the load remains low, the cooling water supplied from the supply pipe 20 flows through the first space S1 and is discharged from the first discharge pipe 21 as indicated by the dotted arrow. Thus, the air passing through the air supply line 10 is not cooled.

  Here, immediately after the start of the internal combustion engine or when the load remains low, the internal combustion engine is not warmed. At this time, if cooled air is supplied to the cylinder 3, good combustion cannot be achieved or lubrication is not performed. Efficiency is reduced due to insufficiency. Therefore, by not cooling the air immediately after the start of the internal combustion engine, a reduction in efficiency immediately after the start of the internal combustion engine is prevented.

  In addition, this invention is not limited to the above-mentioned embodiment. For example, the operation lever of the switching valve may be automatically operated in addition to the manual operation of the embodiment. At this time, a sensor for measuring the temperature of the air supplied to the cylinder may be provided, and the operation lever of the switching valve may be operated by the control device based on the measured temperature of the sensor.

  In addition to the two mutually connected butterfly valves of the embodiment, two mutually connected ball valves may be used as the switching valve.

DESCRIPTION OF SYMBOLS 1 Air cooler 2 Supercharger 3 Cylinder 10 Air supply line 11 1st water chamber part 12 2nd water chamber part 13 Partition plate 16 Outward piping 17 Return line piping 20 Supply pipe 21 1st discharge pipe 22 2nd discharge pipe 30 Switching Valve S1 1st space S2 2nd space S3 3rd space

Claims (1)

An air supply line through which air supplied from the supercharger to the cylinder passes;
A first water chamber portion attached to the air supply conduit and having first and second spaces separated from each other;
A second water chamber portion attached to the air supply conduit and having a third space inside;
A plurality of forward pipings arranged inside the air supply conduit and communicating the first space and the third space;
A plurality of return pipes that are arranged inside the air supply pipe line and communicate with the second space and the third space;
A supply pipe that communicates with the first space and supplies cooling water to the first space;
A first discharge pipe communicating with the first space and discharging cooling water from the first space;
A second discharge pipe communicating with the second space and discharging cooling water from the second space;
It is attached to the first discharge pipe and the second discharge pipe, and the switching of the first discharge pipe from the open state to the closed state is linked with the switching of the second discharge pipe from the closed state to the open state. A switching valve that can be operated, or can be operated in conjunction with switching of the first discharge pipe from the closed state to the open state and switching of the second discharge pipe from the open state to the closed state; An air cooler for an internal combustion engine.

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