JP2017036707A - engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an engine that can increase overall efficiency while inhibiting a decrease in inputting property and blocking property of load.SOLUTION: The engine 1 includes: a supercharger 18 for compressing a gas; and an intercooler 19 having multiple intercooler bodies 26 cooling air compressed by the supercharger 18 by refrigerant respectively at different temperatures and an intercooler chamber 27 provided between the supercharger 18 and a cylinder 6 to store the multiple intercooler bodies 26.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an engine.

  Patent Document 1 describes a water cooling device for an internal combustion engine (engine). The water cooling device for an internal combustion engine described in Patent Document 1 circulates cooling water through a main cooling system including a radiator when the temperature of the cooling water is equal to or higher than a predetermined temperature. On the other hand, when the cooling water temperature is lower than the predetermined temperature, this water cooling device circulates the cooling water in the bypass preheating system that does not include the radiator and includes the intake manifold preheating unit.

The water cooling device uses a thermostat to switch the flow path of the cooling water. Therefore, the response to the temperature change of the cooling water is slow. As a result, after the intake manifold has been warmed up, the water temperature in the intake manifold preheating portion fluctuates around a predetermined temperature, the intake manifold intake is heated, and the amount of intake air in the combustion chamber is reduced.
Therefore, the water cooling device described in Patent Document 1 is provided with a preheating part bypass circuit that bypasses the intake manifold preheating part. Patent Document 1 reduces the water temperature in the intake manifold preheating portion by reducing the flow rate of the cooling water reaching the intake manifold preheating portion by this preheating portion bypass.

Japanese Utility Model Publication No.59-174361

  In an engine, it may be desired to satisfy a pre-defined overall efficiency condition. As a method for improving the overall efficiency of the engine, there is a method of performing waste heat recovery. Furthermore, as a method of efficiently recovering waste heat, there is a method of installing waste water from the cooling water of the intercooler on the side close to the supercharger where a plurality of intercoolers are installed and the cooling water becomes relatively high in temperature. .

  However, for example, when an additional intercooler is provided for an existing engine, the air supply volume increases due to the supercharger to the additional intercooler, the piping from the additional intercooler to the existing intercooler, and the like. When the air supply volume increases in this way, there is a possibility that the loadability and shut-off performance may be reduced.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an engine capable of improving the overall efficiency while suppressing a decrease in load input performance and shut-off performance.

According to the first aspect of the present invention, the engine includes a supercharger that compresses gas, a plurality of intercooler bodies that cool the gas compressed by the supercharger with refrigerants having different temperatures, and the supercharger. An intercooler having an intercooler chamber provided between the cylinders and accommodating the plurality of intercooler bodies.
By comprising in this way, since a some intercooler main body can be accommodated in an intercooler chamber, it can suppress that an air supply volume increases. Furthermore, by providing a plurality of intercooler main bodies, for example, waste heat recovery can be performed using the intercooler main body on the side close to the supercharger. Therefore, it is possible to improve the overall efficiency while suppressing the deterioration of the input property and the blocking property.

According to the second aspect of the present invention, the engine may be arranged such that the plurality of intercooler bodies in the first aspect are closer to the inlet of the intercooler chamber as the temperature of the refrigerant is higher.
With such a configuration, it is possible to sufficiently reduce the supply air temperature with the intercooler body far from the supercharger while efficiently recovering waste heat with the intercooler body near the supercharger.

According to a third aspect of the present invention, in the first or second aspect, the engine includes at least one of the plurality of intercooler bodies disposed on the side close to the supercharger inside the intercooler chamber. The heat of the refrigerant in the intercooler body may be recovered as waste heat.
By comprising in this way, waste heat can be efficiently collect | recovered. As a result, overall efficiency can be improved.

According to a fourth aspect of the present invention, in the engine, the cylinder according to any one of the first to third aspects is arranged in series, and the intercooler is arranged below the supercharger. May be.
With this configuration, in the case of a so-called in-line engine in which cylinders are arranged in series, the intercooler can be installed by effectively using the space below the supercharger. As a result, even if the intercooler includes a plurality of intercooler bodies, it is possible to prevent the entire system from becoming large.

According to the fifth aspect of the present invention, in the engine, a plurality of intercoolers according to the third aspect may be arranged in the direction in which the crankshaft extends.
By configuring in this way, in the case of a multi-cylinder in-line engine in which a large number of cylinders are arranged side by side in the direction in which the crankshaft extends, the increase in size of the intercooler can be suppressed. Therefore, an intercooler can be easily installed.

According to a sixth aspect of the present invention, there is provided an engine according to any one of the first to third aspects, wherein the cylinder is a V-shaped arrangement and the intercooler is a V-shaped arrangement. It may be arranged between each bank.
With this configuration, the space between the banks in the so-called V-type engine can be effectively used as an intercooler arrangement space. Therefore, the enlargement of the entire system can be suppressed while providing a plurality of intercooler bodies.

According to the seventh aspect of the present invention, in the engine, a plurality of intercoolers according to the sixth aspect may be arranged in the direction in which the crankshaft extends.
With such a configuration, in the case of a multi-cylinder V-type engine in which a large number of cylinders are arranged side by side in the direction in which the crankshaft extends, an increase in the size of the intercooler can be suppressed. Therefore, an intercooler can be easily installed.

  According to the engine, it is possible to improve the overall efficiency while suppressing the deterioration of the input performance and shut-off performance.

It is a figure which shows the structure of the engine in 1st embodiment of this invention. It is a figure which shows the structure of the engine of 2nd embodiment of this invention. It is a figure equivalent to FIG. 1 in the 1st modification of 1st embodiment of this invention. It is a figure equivalent to FIG. 1 in the 2nd modification of 1st embodiment of this invention. It is a schematic diagram of the engine in the modification of 2nd embodiment of this invention.

(First embodiment)
Hereinafter, an engine 1 according to a first embodiment of the present invention will be described based on the drawings.
FIG. 1 is a diagram showing a configuration of an engine in the first embodiment of the present invention.
As shown in FIG. 1, the engine 1 includes an engine body 2 and a supercharging device 3. The engine 1 in this embodiment is a stationary engine that drives a generator (not shown).
The engine body 2 constitutes, for example, an in-line gas engine having multiple cylinders. The engine 1 is driven using, for example, city gas, LPG (liquefied petroleum gas) or the like as fuel. FIG. 1 illustrates a case where the engine body 2 has a so-called OHV (Over Head Valve) layout. However, the layout of the engine body 2 may be a layout other than OHV.

  Since the engine body 2 has an OHV layout, it has a camshaft 5 in the vicinity of the crankshaft 4. The cam shaft 5 extends in parallel with the crank shaft 4 on the side of the cylinder 6. By rotating the cam shaft 5, the cam of the cam shaft 5 displaces the base end portion 8 of the push rod 7 up and down. The push rod 7 has a base portion 11 of a rocker arm 10 linked to a tip end portion 9 thereof. The rocker arm 10 can swing around a swing shaft 12 parallel to the cam shaft axis O1. Further, the end portion 13 of the rocker arm 10 can press an intake valve 14 and an exhaust valve (not shown). The intake valve 14 and the exhaust valve are each urged in a direction to close the port of the cylinder 6, and open the port of the cylinder 6 only when being pressed by the rocker arm 10.

  The engine 1 in this embodiment is a sub-chamber type gas engine having a sub-chamber (not shown) in the cylinder head 16. The sub chamber is supplied with fuel into its internal space via a sub chamber gas supply path (not shown). The fuel supplied to the sub chamber is ignited by a spark plug or the like. The flame caused by this ignition flows into the main chamber 17 of the cylinder 6 from the sub chamber.

The supercharging device 3 includes a supercharger 18 and an intercooler 19.
The supercharger 18 is a so-called turbocharger. The supercharger 18 includes a turbine 20 and a compressor 21. The compressor 21 compresses outside air introduced via an air cleaner box or the like. The turbine 20 converts the pressure of exhaust gas of the engine 1 and heat energy into rotational energy. The compressor 21 is driven by the rotational energy obtained by the turbine 20.

  An exhaust pipe 22 and an air supply pipe 23 are connected to the supercharger 18. The exhaust pipe 22 is connected to an exhaust port (not shown) of each cylinder 6 and guides the exhaust gas exhausted from each cylinder 6 to the turbine 20 after joining. The air supply pipe 23 distributes the compressed air compressed by the compressor 21 to each cylinder 6 of the engine body 2 via the intercooler 19.

  The supercharger 18 in this embodiment is disposed at a position shifted in the horizontal direction perpendicular to the crankshaft 4 with respect to the engine body 2 and at a position above the cylinder 6 in the height direction. The exhaust inlet portion 24 of the supercharger 18 is arranged closer to the engine body 2 in the horizontal direction than the air outlet portion 25 of the supercharger 18. Thereby, the full length of the air supply pipe 23 is longer than the full length of the exhaust pipe 22. The air supply pipe 23 shown in FIG. 1 has a bent shape in the middle, but is not limited to this shape, and may be, for example, a curved shape or a linear shape.

  The intercooler 19 cools the compressed air compressed by the supercharger 18 by exchanging heat with the cooling water. The intercooler 19 includes an intercooler main body 26 and an intercooler chamber 27.

  A plurality of intercooler main bodies 26 are provided. These intercooler main bodies 26 are arranged side by side with a predetermined interval in the direction in which the supply air flows. The intercooler main body 26 includes a plurality of tubes through which cooling water flows, and a plurality of fins attached integrally to the tubes. When the supply air flows between the fins of the intercooler body 26, heat exchange is performed between the supply air and the cooling water flowing in the tube. These intercooler bodies 26 have different temperatures of the cooling water flowing inside.

These intercoolers 19 are arranged closer to the supercharger 18, in other words, closer to the inlet 31 of the intercooler chamber 27, as the intercooler body 26 having a relatively high cooling water temperature. The intercooler 19 in this embodiment includes two intercooler main bodies 26. Of these two intercooler main bodies 26, the intercooler main body 26 arranged on the side close to the supercharger 18 in the direction of the supply air is referred to as “first intercooler main body 26 a”, and the intercooler main body 26 arranged on the side close to the cylinder 6. Is referred to as "second intercooler body 26b". The first intercooler body 26a and the second intercooler body 26b in this embodiment may have the same size (capacity), shape, and the like. Thus, when the size (capacity) and shape of each other are the same, the same intercooler body can be used for the first intercooler body 26a and the second intercooler body 26b, so that there is a manufacturing cost advantage.
Have the same size (capacity).

  The intercooler chamber 27 accommodates the plurality of intercooler bodies 26 described above, that is, the first intercooler body 26a and the second intercooler body 26b. The intercooler chamber 27 has an outer wall that covers the first intercooler body 26a and the second intercooler body 26b from the outside. The intercooler chamber 27 is provided in the middle of the air supply pipe 23. The internal space of the intercooler chamber 27 is in communication with the internal space of the air supply pipe 23.

  That is, the compressed air flowing into the intercooler chamber 27 from the air supply pipe 23 on the side close to the supercharger 18 is first cooled by the first intercooler body 26a. Next, the compressed air is cooled by the second intercooler body 26b. Thereafter, the compressed air cooled by the second intercooler body 26 b is supplied to the cylinder 6 through the air supply pipe 23 on the side close to the cylinder 6.

The intercooler chamber 27 is disposed below the supercharger 18. More specifically, the intercooler chamber 27 in this embodiment is disposed vertically below the supercharger 18. The intercooler chamber 27 is divided into three parts, a cover part 28, a body part 29, and a bottom part 30. The cover portion 28, the trunk portion 29, and the bottom portion 30 are arranged in the order of the cover portion 28, the trunk portion 29, and the bottom portion 30 in the direction in which the compressed air flows, that is, from the inlet 31 to the outlet 32 of the intercooler chamber 27. It is arranged with.
The bottom 30 is formed in a bottomed cylindrical shape having an outlet 32 to which an air supply pipe 23 on the side close to the cylinder 6 is connected. The bottom portion 30 has a first flange portion 33 projecting outward at the periphery of the opening.

  The trunk | drum 29 is formed in the cylinder shape which has the same cross-sectional outline as the cross-sectional outline of the bottom part 30 orthogonal to the direction through which compressed air flows. The body portion 29 has second flange portions 34 on the periphery of the two openings. One of the two second flange portions 34 of the body portion 29 is fastened to the first flange portion 33 of the bottom portion 30 by a fastener (not shown) such as a bolt. The

  The cover portion 28 is formed in a bottomed cylindrical shape having an inlet 31 to which an air supply pipe 23 on the side close to the supercharger 18 is connected. This cover part 28 has the same cross-sectional outline as the cross-sectional outline of the trunk | drum 29 orthogonal to the direction through which compressed air flows near the opening. Furthermore, the cover part 28 has the 3rd flange part 35 which protrudes toward the outer periphery at the periphery of the opening. The third flange portion 35 is fastened to the other second flange portion 34 of the two second flange portions 34 of the trunk portion 29 by a fastener (not shown) such as a bolt.

  The cover portion 28 in this embodiment is formed in a trapezoidal cross-sectional shape that tapers as the distance from the cylinder 6 increases. In the intercooler chamber 27 described above, the entire length of the intercooler chamber 27 is extended by sandwiching the body portion 29 between the bottom portion 30 and the cover portion 28. Thereby, a space for accommodating the two intercooler main bodies 26 is secured in one intercooler chamber 27.

  The first intercooler body 26a in this embodiment uses high-temperature cooling water that cools the cylinder 6 and the like of the engine body 2 as the cooling water. The heat of the high-temperature cooling water (for example, about 90 degrees) that has cooled the first intercooler main body 26a and the engine main body 2 is used by the waste heat recovery section B for heating boiler water and the like. Here, the high-temperature cooling water may be used as cooling water for cooling the supercharger 18 as well as the engine body 2 and the supply air.

  On the other hand, the second intercooler body 26b uses low-temperature cooling water dedicated to the second intercooler body 26b. The low-temperature cooling water (for example, about 40 degrees) subjected to heat exchange by the second intercooler body 26b is not recovered by waste heat but is cooled using a radiator or the like.

  Therefore, according to the first embodiment described above, a plurality of intercooler bodies 26 can be accommodated in the intercooler chamber 27. Therefore, compared with the case where the intercooler chamber 27 that houses the first intercooler body 26 a and the intercooler chamber 27 that houses the second intercooler body 26 b are individually formed and these are connected by the air supply pipe 23, the air supply volume Can be prevented from increasing. Furthermore, by providing a plurality of intercooler bodies 26, for example, waste heat recovery can be performed using the intercooler body 26 on the side close to the supercharger 18. As a result, it is possible to improve the overall efficiency while suppressing a decrease in the loadability and the interruption performance.

  Furthermore, the first intercooler body 26a is arranged closer to the inlet 31 of the intercooler chamber 27 than the second intercooler body 26b. Therefore, the intake air temperature can be sufficiently lowered by the intercooler body 26 far from the supercharger 18 while efficiently recovering waste heat by the intercooler body 26 near the supercharger 18.

  Further, the intercooler 19 is disposed below the supercharger 18. Therefore, in the case of the in-line engine 1, the intercooler 19 can be installed by effectively using the space below the supercharger 18. As a result, even if the intercooler 19 includes the first intercooler main body 26a and the second intercooler main body 26b, it is possible to prevent the entire system from becoming large.

(Second Embodiment)
Next, an engine according to a second embodiment of the present invention will be described with reference to the drawings. The engine of the second embodiment is different from the engine of the first embodiment described above only in the cylinder configuration and the arrangement of the intercooler chamber. For this reason, the same parts as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

FIG. 2 is a diagram showing the configuration of the engine according to the second embodiment of the present invention.
As shown in FIG. 2, the engine 1 in this embodiment includes an engine body 2 and a supercharging device 3.
The engine body 2 is a V-type multi-cylinder engine. In this engine 1, a right bank 36 composed of odd-numbered cylinders 6 and a left bank 37 composed of even-numbered cylinders 6 are arranged at a predetermined bank angle and are V-shaped.

The supercharging device 3 includes a supercharger 18 and an intercooler 19.
The supercharger 18 is a turbocharger including a turbine 20 and a compressor 21 as in the first embodiment.
The intercooler 19 cools the compressed air compressed by the supercharger 18 by exchanging heat with the cooling water. The intercooler 19 includes an intercooler body 26 and an intercooler chamber 27.

A plurality of intercooler main bodies 26 are provided. More specifically, the intercooler main body 26 is provided with two, a first intercooler main body 26a and a second intercooler main body 26b, as in the first embodiment.
The temperature of the cooling water in the first intercooler body 26a is higher than that of the second intercooler body 26b. The heat of the cooling water that has exchanged heat with the first intercooler body 26a is used by the waste heat recovery unit B for heating the boiler water and the like.

  The intercooler chamber 27 is disposed in the middle of the air supply pipe 23 and is disposed between the left bank 37 and the right bank 36 of the engine 1. The intercooler chamber 27 houses the first intercooler body 26a and the second intercooler body 26b. The intercooler chamber 27 has an inlet 31 at the upper part thereof and an outlet 32 at the lower part thereof. The inlet 31 is connected to the air supply pipe 23 near the supercharger 18, and the outlet 32 is connected to the air supply pipe 23 near the cylinder 6.

  That is, the compressed air compressed by the supercharger 18 flows into the internal space of the intercooler chamber 27 from the inlet 31 formed in the upper portion of the intercooler chamber 27. Thereafter, the compressed air flows from the top to the bottom in the internal space of the intercooler chamber 27, and flows out from the outlet 32 formed in the lower portion of the intercooler chamber 27 to the air supply pipe 23 on the side close to the cylinder 6.

  The first intercooler body 26a and the second intercooler body 26b in this embodiment may have the same size (capacity) and shape, respectively, as in the first embodiment. Thus, when the size (capacity) and shape of each other are the same, the same intercooler body can be used for the first intercooler body 26a and the second intercooler body 26b, so that there is a manufacturing cost advantage. The first intercooler main body 26a and the second intercooler main body 26b are arranged in the internal space of the intercooler chamber 27 so as to be spaced apart from each other in the direction in which the compressed air flows. More specifically, the first intercooler main body 26 a is disposed on the side close to the inlet 31, and the second intercooler main body 26 b is disposed on the side close to the outlet 32. In other words, the plurality of intercooler main bodies 26 are disposed closer to the supercharger 18, that is, closer to the inlet 31 of the intercooler chamber 27, as the intercooler main body 26 having a relatively high temperature of the coolant flowing therein. In this embodiment, the 1st intercooler main body 26a is arrange | positioned directly on the 2nd intercooler main body 26b.

  Therefore, according to the second embodiment described above, the space between the right bank 36 and the left bank 37 in the V-type multi-cylinder engine can be effectively used as the arrangement space for the intercooler 19. Therefore, the enlargement of the entire system can be suppressed while providing a plurality of intercooler main bodies 26.

  The present invention is not limited to the above-described embodiments, and includes various modifications made to the above-described embodiments without departing from the spirit of the present invention. That is, the specific shapes, configurations, and the like given in the embodiments are merely examples, and can be changed as appropriate.

(First modification of the first embodiment)
FIG. 3 is a view corresponding to FIG. 1 in a modification of the first embodiment of the present invention.
In the first embodiment described above, the case where one intercooler 19 includes two intercooler bodies 26 has been described. However, the number of intercooler bodies 26 provided in one intercooler 19 is not limited to two. As shown in FIG. 3, for example, three or more intercooler bodies 26 may be accommodated in one intercooler chamber 27.

  In the example shown in FIG. 3, the intercooler 19 includes three intercooler main bodies 26. More specifically, the third intercooler body 26c is disposed between the first intercooler body 26a and the second intercooler body 26b. In this modification, the sum of the size (capacity) of the first intercooler body 26a and the size (capacity) of the third intercooler body 26c is set to be equal to the size (capacity) of the second intercooler body 26b. Yes. Furthermore, the size (capacity) of the third intercooler body 26c is smaller than the size (capacity) of the first intercooler body 26a. The temperature of the cooling water flowing inside the third intercooler body 26c is lower than the temperature of the cooling water in the first intercooler body 26a and higher than the temperature of the cooling water in the second intercooler body 26b.

  By comprising in this way, the cooling water of the temperature according to the calorie | heat amount to collect | recover can be obtained. Furthermore, since the first intercooler body 26a and the third intercooler body 26c disposed on the side close to the cover portion 28 of the intercooler chamber 27 are smaller than the second intercooler body 26b, the removal work and the like are easy, and maintenance is easy. Can be improved. Here, the size of the first intercooler body 26a to the third intercooler body 26c described above is not limited to the size of the modification of the first embodiment. What is necessary is just to select according to the calorie | heat amount and water amount which are required. Here, the same high-temperature cooling water may be used for the cooling water in the first intercooler body 26a and the third intercooler body 26c.

(Second modification of the first embodiment)
FIG. 4 is a view corresponding to FIG. 1 in a modification of the first embodiment of the present invention.
In the first embodiment and the first modification described above, the case where a plurality of intercooler bodies 26 are accommodated in one intercooler chamber 27 has been described. However, a plurality of intercooler chambers 27 may be provided. In the second modification shown in FIG. 4, the first intercooler body 26a and the third intercooler body 26c having relatively high cooling water temperatures are accommodated in the first intercooler chamber 27a. Further, in the second modification, the first intercooler body 26a and the second intercooler body 26b in which the temperature of the cooling water is relatively lower than that of the third intercooler body 26c are accommodated in the second intercooler chamber 27b. Yes. In other words, the first intercooler chamber 27a accommodates the intercooler body 26 that recovers the waste heat of the cooling water by the waste heat recovery unit B, and the second intercooler chamber 27b recovers the waste heat of the cooling water by the waste heat recovery unit B. The intercooler main body 26 which does not perform is accommodated.

The first intercooler chamber 27 a includes a cover portion 28 and a bottom portion 30. The first flange portion 33 of the bottom portion 30 and the third flange portion 35 of the cover portion 28 are fastened by a fastener such as a bolt.
The second intercooler chamber 27 b includes a second cover part 38 and a bottom part 30. The first flange portion 33 of the bottom portion 30 and the fourth flange portion 39 of the second cover portion 38 are fastened by a fastener such as a bolt.
The bottom 30 of the first intercooler chamber 27a and the second cover portion 38 of the second intercooler chamber 27b are connected via an intermediate flow path. By this intermediate flow path, the air supply that has passed through the first intercooler chamber 27a is introduced into the second intercooler chamber 27b. This intermediate passage is formed as short as possible from the viewpoint of reducing the air supply volume. In other words, the first intercooler chamber 27a and the second intercooler chamber 27b are arranged as close as possible.

  In FIG. 4, the case where the two intercooler chambers 27 of the 1st intercooler chamber 27a and the 2nd intercooler chamber 27b are provided was illustrated. However, two or more intercooler chambers 27 may be provided according to the quantity of the intercooler main body 26.

  According to the second modification described above, the intercooler body 26 having a relatively high cooling water temperature and the intercooler body 26 having a relatively low cooling water temperature are accommodated in the individual intercooler chambers 27. . Therefore, it can suppress that intercooler main bodies 26 from which the temperature of cooling water differs have a bad influence mutually.

  Further, by providing a plurality of intercooler chambers, for example, when only the second intercooler body 26b is to be maintained, the second intercooler body 26b can be accessed immediately if only the second intercooler chamber 27b is opened. Similarly, when only the first intercooler body 26a is to be maintained, the first intercooler body 26a can be accessed immediately by opening only the first intercooler chamber 27a. Therefore, the man-hour and time required for maintenance of the intercooler body 26 can be shortened, and the burden on the operator can be reduced.

  In the second modification described above, the case where the first intercooler body 26a and the third intercooler body 26c are accommodated in the first intercooler chamber 27a has been described. However, the third intercooler body 26c may be housed in the second intercooler chamber 27b together with the second intercooler body 26b. In this case, the third intercooler body 26c having a relatively high cooling water temperature is disposed closer to the first intercooler chamber 27a than the second intercooler body 26b having a relatively low cooling water temperature.

(Modification of the second embodiment)
FIG. 5 is a schematic view of an engine in a modification of the second embodiment of the present invention.
In the case of a V-type multi-cylinder engine having a long dimension in the crankshaft direction of the engine 1, a plurality of intercoolers 19 may be provided in the extending direction of the right bank 36 and the left bank 37 as shown in FIG. Although FIG. 5 illustrates a 16-cylinder engine, the number of cylinders is not limited to this. 5 illustrates a case where two intercoolers 19 are arranged in the extending direction of the right bank 36 and the left bank 37, but there are three intercoolers 19 in the extending direction of the right bank 36 and the left bank 37. You may make it arrange | position above.
By configuring as in the modification of the second embodiment, it is possible to suppress an increase in size of one intercooler 19. As a result, the intercooler 19 can be easily installed.

(Other variations)
In each of the above-described embodiments, the inline type or V type engine 1 has been described as an example. However, the present invention is not limited to the in-line or V-type engine 1. Furthermore, although the sub-chamber type gas engine has been described as an example, it is not limited to the sub-chamber type and is not limited to the gas engine. The present invention can be applied to, for example, a direct injection engine or an engine using gasoline, diesel, or the like as fuel.

Furthermore, in each embodiment mentioned above, the case where only one supercharger 18 was provided was demonstrated. However, the present invention can also be applied to an engine including a plurality of superchargers 18.
Furthermore, in the above-described first embodiment and its modifications, the case where the cover portion 28 constituting the intercooler chamber 27 is formed in a trapezoidal cross section is illustrated. However, the shape of the cover portion 28 is not limited to a trapezoidal cross section.

Furthermore, in each embodiment mentioned above, the case where cooling water was used as a refrigerant | coolant used with the intercooler 19 was demonstrated. However, the refrigerant is not limited to water.
Furthermore, the gas compressed by the supercharger 18 described above is not limited to air. It may be an air-fuel mixture in which gas and air are mixed in advance.

DESCRIPTION OF SYMBOLS 1 ... Engine 2 ... Engine main body 3 ... Supercharging device 4 ... Crankshaft 5 ... Camshaft 6 ... Cylinder 7 ... Push rod 8 ... Base end part 9 ... Tip part 10 ... Rocker arm 11 ... Base part 12 ... Swing shaft 13 ... End portion 14 ... Intake valve 15 ... Port 16 ... Cylinder head 17 ... Main chamber 18 ... Supercharger 19 ... Intercooler 20 ... Turbine 21 ... Compressor 22 ... Exhaust pipe 23 ... Intake pipe 24 ... Exhaust inlet section 25 ... Inlet outlet section 26 ... Intercooler body 26a ... First intercooler body 26b ... Second intercooler body 26c ... Third intercooler body 27 ... Intercooler chamber 28 ... Cover part 29 ... Body part 30 ... Bottom part 31 ... Inlet 32 ... Outlet 33 ... First flange part 34 ... Second flange part 35 ... Third flange part 36 ... Right bank 37 ... Left bank 38 ... Second cover part 39 ... Fourth flange part B ... Waste heat recovery part O1 ... Axis of cam shaft

Claims (7)

A supercharger for compressing the gas;
A plurality of intercooler bodies that cool the gases compressed by the supercharger with refrigerants of different temperatures, and an intercooler chamber that is provided between the supercharger and the cylinder and accommodates the plurality of intercooler bodies. An engine including an intercooler.   2. The engine according to claim 1, wherein the plurality of intercooler main bodies are arranged closer to an inlet portion of the intercooler chamber as the temperature of the refrigerant is higher.   The heat of the refrigerant of at least one of the intercooler bodies arranged on the side close to the supercharger inside the intercooler chamber among the plurality of intercooler bodies is recovered as waste heat. engine. The cylinder is arranged in series,
The engine according to any one of claims 1 to 3, wherein the intercooler is disposed below the supercharger.   The engine according to claim 4, wherein a plurality of the intercoolers are arranged in a direction in which a crankshaft extends. The cylinder has a V-shaped arrangement,
The engine according to any one of claims 1 to 3, wherein the intercooler is disposed between the banks of the cylinders having a V-shaped arrangement.   The engine according to claim 6, wherein a plurality of the intercoolers are arranged in a direction in which a crankshaft extends.