engine

Abstract

To provide an engine with improved layout flexibility for engine mounting components. [Solution] The engine 100 comprises an engine body 1 and an EGR cooler 20. The EGR cooler 20 is attached to one side of the engine body 1, front or rear. The longitudinal direction of the EGR cooler 20 is aligned with the left-right direction of the engine body 1. Preferably, the engine 100 further comprises a supercharger 10 and an intake collector 40. The intake collector 40 has a first port 40b that communicates with the supercharger 10 and receives intake air, a second port 40c that communicates with the EGR cooler 20 and receives EGR gas, and a third port 40d that supplies a mixture of intake air and EGR gas.

Description

Technical Field

[0001] The present invention relates to an engine.

Background Art

[0002] There is known a technique called EGR (Exhaust Gas Recirculation), that is, a technique of taking in a part of the exhaust gas after combustion in an engine and re-intaking it into the intake air.

[0003] The engine described in Patent Document 1 includes an EGR cooler attached to the exhaust side located on the left and right sides of the engine body. The EGR cooler cools a part of the exhaust gas before returning it to the intake side.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] When an EGR cooler is arranged on the engine exhaust side like the engine described in Patent Document 1, it becomes difficult to secure the arrangement space for the exhaust gas post-treatment device and auxiliary equipment that are also arranged on the engine exhaust side, and the layout freedom of the engine mounting parts decreases.

[0006] An object of the present invention is to provide an engine with improved layout freedom of engine mounting parts.

Means for Solving the Problems

[0007] The engine of the present invention includes an engine body and an EGR cooler. The EGR cooler is attached to one side of the front and rear of the engine body. The longitudinal direction of the EGR cooler is along the left-right direction of the engine body. [Effects of the Invention]

[0008] According to the present invention, since the space on the engine exhaust side is not taken up by the EGR cooler, the degree of freedom in the layout of mounting components on the engine exhaust side is improved. [Brief explanation of the drawing]

[0009] [Figure 1] This is a front view of the engine according to the embodiment. [Figure 2] This is a left side view of the engine. [Figure 3] This is a plan view of the engine. [Figure 4] This is an enlarged perspective view of the intake collector. [Figure 5] Another enlarged perspective view of the intake collector. [Figure 6] This is an enlarged front view of the lifting member. [Figure 7] This is an enlarged cross-sectional view showing the mounting state of the intake collector. [Figure 8] (a) and (b) are schematic diagrams illustrating the assembly of the lifting member, second intake pipe, and intake collector relative to the engine body in the engine according to the embodiment. [Figure 9] (a) and (b) are schematic diagrams illustrating the assembly of the EGR valve, EGR cooler, and EGR gas outlet piping to the engine body in the engine according to the embodiment. [Modes for carrying out the invention]

[0010] Embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts will be denoted by the same reference numerals and will not be repeated in the description.

[0011] First, the external appearance of the engine 100 according to the embodiment will be described with reference to Figures 1, 2, and 3. Figure 1 is a front view of the engine 100. Figure 2 is a left side view of the engine 100. Figure 3 is a top view of the engine 100. The engine 100 is, for example, a diesel engine. In Figure 1, for convenience, the direction from left to right is considered the positive direction of the X-axis, the direction from front to back is considered the positive direction of the Y-axis, and the direction from bottom to top is considered the positive direction of the Z-axis. The direction of the X-axis indicates the left-right direction of the engine 100, the direction of the Y-axis indicates the front-back direction of the engine 100, and the direction of the Z-axis indicates the up-down direction of the engine 100.

[0012] As shown in Figures 1, 2, and 3, the engine 100 comprises an engine body 1, a supercharger 10, an EGR cooler 20, an EGR valve 30, and an intake collector 40.

[0013] The supercharger 10 is mounted on the exhaust side of the engine body 1 and has a turbine that receives the exhaust flow and a compressor driven by the turbine to increase the intake pressure. The compressor input side is connected to the first intake pipe 11, and the compressor output side is connected to the second intake pipe 12. As shown in Figure 3, the second intake pipe 12 is positioned closer to the engine body 1 than the EGR cooler 20.

[0014] The EGR cooler 20 is mounted on one side of the engine body 1, front or rear, and cools a portion of the exhaust gas before returning it to the intake side. The longitudinal direction of the EGR cooler 20 is aligned with the left-right direction of the engine body 1. The gas inlet side of the EGR cooler 20 is connected to the EGR gas inlet pipe 21. The gas outlet side of the EGR cooler 20 is connected to the EGR gas outlet pipe 22. In addition, a first pipe 23 and a second pipe 24 are connected to the EGR cooler 20 for the inflow and outflow of coolant.

[0015] The EGR valve 30 is a control valve attached to the intake side of the engine body 1 and connected to the EGR gas outflow pipe 22 so as to control the flow rate of the cooled EGR gas. Moreover, the EGR valve 30 is arranged at a position higher than the supercharger 10 in the vertical direction of the engine body 1. Therefore, the EGR cooler 20 is arranged in an inclined manner between the supercharger 10 and the EGR valve 30. That is, the gas outflow side of the EGR cooler 20 is arranged at a position higher than the gas inflow side of the EGR cooler 20 in the vertical direction of the engine body 1. However, the EGR cooler 20 is arranged at a position lower than the uppermost part of the engine body 1 in the vertical direction of the engine body 1.

[0016] The intake collector 40 is attached at a position adjacent to the EGR valve 30 and mixes the intake air supplied from the supercharger 10 and the cooled EGR gas supplied from the EGR cooler 20. The EGR valve 30 is a control valve interposed in the gas path between the EGR cooler 20 and the intake collector 40.

[0017] Next, the shape of the intake collector 40 will be described. FIG. 4 is an enlarged perspective view of the intake collector 40. FIG. 5 is another enlarged perspective view of the intake collector 40.

[0018] As shown in FIGS. 4 and 5, the intake collector 40 has a main body portion 40a, a first port 40b, a second port 40c, a third port 40d, a first mounting hole 40e, and a second mounting hole 40f. The first port 40b is connected to the second intake pipe 12. The second port 40c is connected to the EGR gas outflow pipe 22 via the EGR valve 30. The third port 40d supplies the mixture of the intake air and the cooled EGR gas. The first mounting hole 40e and the second mounting hole 40f are formed in the plate material constituting the third port 40d.

[0019] As shown in FIG. 3, by introducing intake air and EGR gas into the intake collector 40 from different side portions of the engine body 1, their mixing is promoted and good combustion is achieved. Further, by shortening the intake path from the supercharger 10 to the intake collector 40 and diverting the EGR gas path from a different side portion and introducing it into the intake collector 40, the heat dissipation of the EGR gas is promoted and the temperature difference from the intake air becomes smaller, and even better combustion is achieved.

[0020] The engine 100 further includes a lifting member 50 for lifting the engine body 1. Here, the shape of the lifting member 50 will be described. FIG. 6 is an enlarged front view of the lifting member 50.

[0021] As shown in FIG. 6, the lifting member 50 has a plate-like main body portion 50a. A lifting hole 50b is formed near the upper end of the main body portion 50a. A first mounting hole 50c and a second mounting hole 50d are formed near the center of the main body portion 50a. Further, a third mounting hole 50e is formed between the lifting hole 50b and the first mounting hole 50c, and a fourth mounting hole 50f is formed near the lower end of the main body portion 50a.

[0022] Next, referring to FIGS. 4 to 7, the mounting state of the intake collector 40 will be described. FIG. 7 is an enlarged cross-sectional view showing the mounting state of the intake collector 40.

[0023] As shown in FIG. 7, the lifting member 50 is attached to the engine body 1 by one short bolt at the positions of the first mounting hole 50c and the second mounting hole 50d, respectively. The intake collector 40 is attached to the engine body 1 via the lifting member 50. At this time, a long bolt passes through the first mounting hole 40e of the intake collector 40 and the third mounting hole 50e of the lifting member 50. Also, a long bolt passes through the second mounting hole 40f of the intake collector 40 and the fourth mounting hole 50f of the lifting member 50. By being fixed with four bolts, the mounting strength of the intake collector 40 and the lifting member 50 is improved.

[0024] Next, the installation of the intake collector 40 will be explained with reference to Figures 8 and 9. Figure 8(a) is a schematic diagram illustrating the assembly of the lifting member 50 to the engine body 1 in the engine 100 according to the embodiment, and Figure 8(b) is a schematic diagram illustrating the assembly of the second intake pipe 12 and the intake collector 40 to the engine body 1 in the engine 100 according to the embodiment. Figure 9(a) is a schematic diagram illustrating the assembly of the EGR valve 30 to the engine body 1 in the engine 100 according to the embodiment. Figure 9(b) is a schematic diagram illustrating the assembly of the EGR cooler 20 and the EGR gas outlet piping 22 to the engine body 1 in the engine 100 according to the embodiment.

[0025] As shown in Figure 8(a), the lifting member 50 is attached to the engine body 1. The lifting member 50 is attached to the engine body 1 by passing bolts through the first mounting hole 50c and the second mounting hole 50d of the lifting member 50.

[0026] As shown in Figure 8(b), the intake collector 40 is attached to the engine body 1 via the lifting member 50. At this time, a long bolt is passed through the first mounting hole 40e of the intake collector 40 and the third mounting hole 50e of the lifting member 50, fastening the intake collector 40 to the lifting member 50. Additionally, a long bolt is passed through the second mounting hole 40f of the intake collector 40 and the fourth mounting hole 50f of the lifting member 50, fastening the intake collector 40 to the lifting member 50.

[0027] As shown in Figure 9(a), the EGR valve 30 is attached to the engine body 1 via the intake collector 40.

[0028] As shown in Figure 9(b), an EGR cooler 20 is installed, and an EGR gas outlet pipe 22 is installed that connects the downstream end of the EGR cooler 20 to the EGR valve 30.

[0029] According to this embodiment, since the space on the engine exhaust side is not taken up by the EGR cooler 20, the degree of freedom in the layout of mounting components on the engine exhaust side is improved.

[0030] Embodiments of the present invention have been described above with reference to the drawings. However, the present invention is not limited to the embodiments described above, and can be implemented in various forms without departing from the spirit of the invention. Furthermore, various inventions can be formed by appropriately combining the multiple components disclosed in the above embodiments. For example, some components may be deleted from all the components shown in the embodiments. The drawings are schematic representations mainly of each component for ease of understanding, and the number of each component shown may differ from the actual number due to the convenience of drawing creation. Also, each component shown in the above embodiments is just an example and is not particularly limiting, and various modifications are possible without substantially departing from the effects of the present invention. [Industrial applicability]

[0031] This invention is applicable to the field of engines. [Explanation of Symbols]

[0032] 1. Engine body 10 Supercharger 11. First intake manifold 12. Second inspiratory tube (inspiratory tube) 20 EGR cooler 21 EGR gas inlet piping 22 EGR gas outlet piping 30 EGR valve (control valve) 40 Intake collector 40b Port 1 40c Port 2 40d Third Port 50 Lifting member 100 engine

Claims

1. The engine body and An EGR cooler is attached to one side of the front or rear of the engine body, Equipped with, The longitudinal direction of the EGR cooler is aligned with the left-right direction of the engine body, in this engine.

2. The engine according to claim 1, wherein the gas outlet side of the EGR cooler is positioned higher than the gas inlet side of the EGR cooler in the vertical direction of the engine body.

3. The engine according to claim 2, wherein the EGR cooler is positioned lower than the uppermost part of the engine body in the vertical direction of the engine body.

4. A supercharger having a turbine and a compressor, The intake pipe connected to the compressor output side of the supercharger, Furthermore, The engine according to claim 1, wherein the intake pipe is positioned closer to the engine body than the EGR cooler.

5. The intake collector further comprises a first port, a second port, and a third port. The first port is connected to the intake pipe, The second port is connected to the gas outlet side of the EGR cooler. The engine according to claim 4, wherein the third port is supplied with a mixture of intake air supplied from the supercharger through the intake pipe and gas supplied from the EGR cooler.

6. The system further comprises a control valve positioned in the gas path between the EGR cooler and the intake collector, The engine according to claim 5, wherein the control valve controls the flow rate of gas supplied to the intake collector.

7. The system further includes a lifting member for lifting the engine body, The engine according to claim 5, wherein the intake collector is attached to the engine body via the lifting member.

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