JP2019031963A - Auxiliary machine attachment structure of internal combustion engine - Google Patents

Abstract

To provide an auxiliary machine attachment structure of an internal combustion engine which can attach an auxiliary machine to the internal combustion engine by preventing the enlargement of a dimension of the internal combustion engine in a height direction.SOLUTION: At a side face 3a of a cylinder head 3 along an alignment direction of cylinders, there are formed: a bulge part 15 which is bulged to the outside from the side face 3a of the cylinder head 3, and extended along the alignment direction of the cylinders, and in which an exhaust passage part is formed; an exhaust flange part 16 which is protruded to the outside rather than the bulge part 15 from the side face 3a of the cylinder head 3, and in which an exhaust aggregation part, a first exhaust port 14A and a second exhaust port 14B are formed; and a first boss part 35 and a second boss part 36 to which a starter generator is attached. The first boss part 35 is formed between the bulge part 15 and a lower end part 3b of the cylinder head 3, and the starter generator is attached to the side face 3a of the cylinder head 3 via the first boss part 35 and the second boss part 36 so as to adjoin the exhaust flange part 16 in the alignment direction of the cylinders.SELECTED DRAWING: Figure 5

Description

  The present invention relates to an auxiliary machine mounting structure for an internal combustion engine.

  An auxiliary machine such as an alternator and an air conditioner compressor is installed in an engine mounted on a vehicle such as an automobile (see Patent Document 1). In the engine described in Patent Document 1, an exhaust pipe is connected to an exhaust manifold that protrudes outward from a side surface of the engine.

  An alternator and an air conditioner compressor are provided on the side surface of the engine, and the alternator and the air conditioner compressor are disposed adjacent to the exhaust manifold below the exhaust manifold.

JP 7-180542 A

  However, a conventional engine has an exhaust manifold that protrudes outward from the side of the engine, and an alternator and an air conditioner compressor are installed below the exhaust manifold. It gets bigger. For this reason, an engine will enlarge.

  The present invention has been made by paying attention to the above-described circumstances, and is a supplement to an internal combustion engine that can prevent an increase in the height dimension of the internal combustion engine and attach an auxiliary machine to the internal combustion engine. The object is to provide a machine mounting structure.

  The present invention includes a cylinder block having a plurality of cylinders arranged in a line, and a cylinder head provided at an upper portion of the cylinder block and having an exhaust passage for exhausting exhaust gas from the cylinder. The exhaust passage is provided for each cylinder, the exhaust passage portion through which the exhaust gas discharged from the cylinder flows, and the downstream side of the exhaust passage portion, each of which has at least two exhaust passage portions. An exhaust collecting portion that collects for each cylinder, and opens to a side surface of the cylinder head that communicates with the exhaust collecting portion along the arrangement direction of the cylinders, and exhaust gas flowing through the exhaust collecting portion An auxiliary machine mounting structure for an internal combustion engine including an exhaust port for discharging to the outside, wherein the side surface of the cylinder head bulges outward from the side surface; and A bulging portion extending along the arrangement direction of the cylinders and forming the exhaust passage portion, and an exhaust collecting portion and an exhaust port projecting outward from the bulging portion from the side surface of the cylinder head. An exhaust flange portion to be formed and a plurality of boss portions to which accessories are attached are formed, and at least one of the plurality of boss portions is formed between the bulging portion and a lower end portion of the cylinder head. The auxiliary machine is attached to the side surface of the cylinder head via the boss portion so as to overlap the exhaust flange portion in the arrangement direction of the cylinders.

  As described above, according to the present invention, it is possible to prevent an increase in the dimension in the height direction of the internal combustion engine and attach an auxiliary machine to the internal combustion engine.

FIG. 1 is a front view of an engine equipped with an accessory mounting structure according to an embodiment of the present invention. FIG. 2 is a left side view of an engine equipped with an accessory mounting structure according to an embodiment of the present invention. FIG. 3 is a right side view of an engine equipped with an accessory mounting structure according to an embodiment of the present invention. FIG. 4 is a front view of a cylinder block and a cylinder head of an engine equipped with an accessory mounting structure according to an embodiment of the present invention, and is an enlarged view of the vicinity of an exhaust pipe. FIG. 5 is a front view of a cylinder block and a cylinder head of an engine equipped with an accessory mounting structure according to an embodiment of the present invention, and shows a state where an exhaust pipe, a catalytic converter and a starter generator are removed. . 6 is a cross-sectional view taken along the line VI-VI in FIG. 7 is a cross-sectional view taken along the line VII-VII in FIG. FIG. 8 is a view of a catalytic converter as viewed from below in an engine equipped with an accessory mounting structure according to an embodiment of the present invention. FIG. 9 is a front view of a cylinder block and a cylinder head of an engine provided with an accessory mounting structure according to an embodiment of the present invention, and shows a state in which an accessory mounting bracket is attached.

  An auxiliary machine mounting structure for an internal combustion engine according to an embodiment of the present invention is provided with a cylinder block having a plurality of cylinders arranged in a row, and an upper portion of the cylinder block, and exhausts from a plurality of cylinders inside. A cylinder head formed with an exhaust passage for exhausting gas, an exhaust passage is provided for each cylinder, an exhaust passage portion through which exhaust gas discharged from the cylinder flows, and a downstream side of the exhaust passage portion, An exhaust collecting portion that collects at least two exhaust passage portions for each cylinder, and an exhaust gas that flows through the exhaust collecting portion and opens to the side surface of the cylinder head in communication with the exhaust collecting portion along the cylinder arrangement direction. An auxiliary machine mounting structure for an internal combustion engine that includes an exhaust port that discharges to the outside of a cylinder head, and swells outward from the side surface of the cylinder head, and the cylinder arrangement direction Attached to the bulging part extending along the exhaust passage part, the exhaust flange part projecting outward from the bulging part from the side surface of the cylinder head to form the exhaust collecting part and the exhaust port, and the auxiliary equipment And at least one of the plurality of boss portions is formed between the bulging portion and the lower end portion of the cylinder head. It is attached to the side surface of the cylinder head via a boss portion so as to overlap the portion.

  Thereby, it is possible to prevent the dimension in the height direction of the internal combustion engine from increasing and attach an auxiliary machine to the internal combustion engine.

Hereinafter, an auxiliary machine mounting structure for an internal combustion engine according to an embodiment of the present invention will be described with reference to the drawings.
1 to 9 are views showing an auxiliary machine mounting structure for an internal combustion engine according to one embodiment of the present invention. In FIG. 1 to FIG. 9, the up / down / front / rear / left / right direction is a direction perpendicular to the direction along the cylinder arrangement direction of the engine and the side where the exhaust pipe is installed is the front side. The height direction of the engine is the vertical direction.

First, the configuration will be described.
1 and 2, an engine 1 as an internal combustion engine is installed in an engine room (not shown) of the vehicle. The engine 1 includes a cylinder block 2, a cylinder head 3 attached to the upper part of the cylinder block 2, and an oil pan 4 attached to the lower part of the cylinder block 2.

  The cylinder block 2 is provided with a plurality of cylinders 2A, 2B, 2C, and 2D (see FIG. 6). The cylinders 2A, 2B, 2C, and 2D are arranged in a line in the left-right direction of the engine 1. Yes. Pistons (not shown) are accommodated in the cylinders 2A, 2B, 2C, and 2D, and the pistons reciprocate in the vertical direction with respect to the cylinders.

  The piston is connected to the crankshaft 2S (see FIG. 3) via a connecting rod (not shown), and the reciprocating motion of the piston is converted into the rotational motion of the crankshaft 2S via the connecting rod.

  The cylinder head 3 includes a plurality of intake ports 3A (see FIG. 6), a plurality of intake valves (not shown) for opening and closing the intake ports 3A, an exhaust port 3B (see FIG. 6), and a plurality of not shown (opening and closing). Exhaust valves and the like are provided. The intake port 3A introduces air into the cylinders 2A, 2B, 2C, and 2D, and the exhaust port 3B discharges exhaust gas burned in the cylinders 2A, 2B, 2C, and 2D from the cylinders.

  The cylinder head 3 is rotatably provided with an intake camshaft having an intake cam (not shown) and an exhaust camshaft having an exhaust cam. The intake valve and the exhaust valve are driven to open and close by the intake cam and the exhaust cam. The

  In FIG. 1, a chain case 5 (see FIG. 3) is provided on the right side surface of the cylinder block 2 and the cylinder head 3, and the timing at which the chain case 5 is provided on the right side surface of the cylinder block 2 and the cylinder head 3. Covers the chain 6 (shown in phantom in FIG. 3).

  4 and 5, case flange portions 2F and 3F are formed at the right ends of the cylinder block 2 and the cylinder head 3, and the chain case 5 is secured to the case flange portions 2F and 3F by bolts 20 (see FIG. 4). It is concluded to. The right end portion of the cylinder head 3 of the present embodiment constitutes an end portion of the cylinder head of the present invention in the arrangement direction of the cylinders.

  In FIG. 3, the timing chain 6 connects a crank pulley 46 provided on the crankshaft 2S and cam pulleys 17A and 17B provided on the intake camshaft and the exhaust camshaft, respectively. It is transmitted to the intake camshaft and exhaust camshaft.

  In FIG. 1, a transmission 7 is attached to the left side surface of the cylinder block 2, and the transmission 7 has a plurality of transmission gears (not shown) for establishing a plurality of shift stages, and the rotational speed of the engine 1. Change the speed.

  The oil pan 4 stores oil for lubricating the crankshaft 2S, the piston, and the like, and the oil is supplied to the crankshaft 2S, the piston, and the like by an oil pump (not shown).

  1 and 4, an exhaust pipe 8 is attached to the cylinder head 3. The exhaust pipe 8 includes the side surface 3 a of the cylinder head 3 and the cylinder block 2 along the arrangement direction of the cylinders 2 </ b> A, 2 </ b> B, 2 </ b> C, and 2 </ b> D. And the side surface 2a. Exhaust gas discharged from the exhaust port 3B is introduced into the exhaust pipe 8.

  A catalytic converter 9 is attached to the downstream end of the exhaust pipe 8, and the exhaust pipe 8 and the catalytic converter 9 extend in the height direction of the engine 1. The catalytic converter 9 purifies the exhaust gas discharged from the exhaust pipe 8 and then discharges it to an exhaust pipe (not shown) provided on the downstream side. The exhaust pipe 8 and the catalytic converter 9 of the present embodiment constitute the exhaust pipe of the present invention.

  In FIG. 6, an exhaust passage 11 is formed inside the cylinder head 3. The exhaust passage 11 includes exhaust passage portions 12A, 12B, 12C and 12D, exhaust collecting portions 13A and 13B, a first exhaust port 14A and a second exhaust port 14B (see FIG. 5).

  The exhaust passage portions 12A, 12B, 12C, and 12D communicate with the cylinders 2A, 2B, 2C, and 2D through the exhaust port 3B, respectively. The exhaust passage portions 12B and 12C are formed below the exhaust passage portions 12A and 12D. Exhaust gases discharged from the cylinders 2A, 2B, 2C and 2D pass through the exhaust passage portions 12A, 12B, 12C and 12D, respectively. Flowing. In FIG. 6, the exhaust gas flowing through the exhaust passage 11 is indicated by an arrow W.

  The exhaust collecting portion 13A is provided on the downstream side of the exhaust passage portions 12A and 12D. The exhaust collecting portion 13A collects the exhaust passage portions 12A and 12D and collects exhaust gas flowing through the exhaust passage portions 12A and 12D.

  The exhaust collecting portion 13B is formed below the exhaust collecting portion 13A (see FIG. 7), and is provided on the downstream side of the exhaust passage portions 12B and 12C. The exhaust collecting portion 13B collects the exhaust passage portions 12B and 12C and collects exhaust gas flowing through the exhaust passage portions 12B and 12C.

  The first exhaust port 14A opens to the side surface 3a of the cylinder head 3 and communicates with the exhaust collecting portion 13A. The second exhaust port 14B opens to the side surface 3a of the cylinder head 3 below the first exhaust port 14A, and communicates with the exhaust collecting portion 13B.

  As a result, the exhaust gas discharged from the cylinders 2A and 2D flows through the exhaust passage portions 12A and 12D through the exhaust port 3B, and then is discharged from the first exhaust port 14A to the outside of the cylinder head 3 through the exhaust collecting portion 13A. The

  The exhaust gas discharged from the cylinders 2B and 2C flows through the exhaust passage portions 12B and 12C through the exhaust port 3B, and then is discharged from the second exhaust port 14B to the outside of the cylinder head 3 through the exhaust collecting portion 13B.

  4 and 5, a bulging portion 15 is formed on the side surface 3 a of the cylinder head 3. The bulging portion 15 bulges outward from the side surface 3a of the cylinder head 3 and extends along the arrangement direction of the cylinders 2A, 2B, 2C, and 2D. The bulging portion 15 is formed with exhaust passage portions 12A and 12D positioned above the exhaust passage portions 12B and 12C.

  In FIG. 5, an exhaust flange portion 16 is formed on the side surface 3a of the cylinder head 3, and the exhaust flange portion 16 protrudes outward from the bulging portion 15 from the side surface 3a of the cylinder head 3 (FIG. 6). reference). As shown in FIG. 7, the exhaust flange portion 16 is formed with exhaust collecting portions 13A and 13B, a first exhaust port 14A, and a second exhaust port 14B.

  In FIG. 5, the bulging portion 15 is inclined upward from both sides of the cylinder arrangement direction toward the exhaust flange portion 16, and is connected to the exhaust flange portion 16.

  In FIG. 6, cylinders 2A and 2D are respectively installed on both sides of the cylinder block 2 in the arrangement direction of the cylinders. The cylinder 2A constitutes the first outer cylinder of the present invention, and the cylinder 2D A second outer cylinder is configured.

  The cylinders 2B and 2C are disposed between the cylinders 2A and 2D in the arrangement direction of the cylinders, and the cylinders 2B and 2C constitute an inner cylinder of the present invention.

  The exhaust passage portion 12A extends from the cylinder 2A via the bulging portion 15 to the exhaust flange portion 16, and constitutes the first outer exhaust passage portion of the present invention. The exhaust passage portion 12D extends from the cylinder 2D to the exhaust flange portion 16 via the bulging portion 15 and constitutes a second outer exhaust passage portion of the present invention.

  The exhaust passage portion 12B extends from the cylinder 2B to the exhaust flange portion 16, and constitutes the inner exhaust passage portion of the present invention. The exhaust passage portion 12C extends from the cylinder 2C to the exhaust flange portion 16, and constitutes the inner exhaust passage portion of the present invention.

  The exhaust collecting portion 13A collects the exhaust passage portion 12A and the exhaust passage portion 12D, and constitutes the first exhaust collecting portion of the present invention. The exhaust collecting portion 13B formed below the exhaust collecting portion 13A collects the exhaust passage portion 12B and the exhaust passage portion 12C, and constitutes the second exhaust collecting portion of the present invention.

  The first exhaust port 14A communicating with the exhaust collecting portion 13A and the second exhaust port 14B communicating with the exhaust collecting portion 13B below the first exhaust port 14A constitute the exhaust port of the present invention.

  In FIG. 7, the upstream end of the exhaust pipe 8 is attached to the exhaust flange portion 16. The exhaust pipe 8 has a first exhaust pipe passage 22 and a second exhaust pipe passage 23 partitioned by a partition wall 21. Here, upstream and downstream mean upstream and downstream in the direction in which the exhaust gas flows.

  The first exhaust pipe passage 22 communicates with the first exhaust port 14A, and exhaust gas is discharged from the first exhaust port 14A to the first exhaust pipe passage 22. The second exhaust pipe passage 23 communicates with the second exhaust port 14B, and exhaust gas is discharged from the second exhaust port 14B into the second exhaust pipe passage 23.

  The first exhaust pipe passage 22 is formed above the second exhaust pipe passage 23 and away from the side surface 3 a of the cylinder head 3 with respect to the second exhaust pipe passage 23.

  The exhaust pipe 8 extends linearly outward from the side surface 3a of the cylinder head 3 and then extends downwardly.

  That is, the exhaust pipe 8 of the present embodiment includes a straight portion 31 extending linearly outward from the exhaust flange portion 16, and a curved inner side surface 32a that curves downward from the straight portion 31 and faces the side surface 2a of the cylinder block 2. And a curved portion 32 having a curved outer surface 32b located on the opposite side to the side surface 2a of the cylinder block 2.

  The bending portion 32 extends in a direction in which the cylinder axis 2L and the curved outer surface 32b extend with respect to a maximum distance Lmax where the curved outer surface 32b and the cylinder axis 2L are farthest apart in an axial direction orthogonal to the cylinder axis 2L. It curves so that distance L with tip part 32c may become short. Here, the cylinder axis is based on the cylinder 2B or the axis 2L of the cylinder 2C formed near the exhaust pipe 8 among the cylinders 2A, 2B, 2C, and 2D.

  In other words, the first central point O1 is defined as the first central point O1 in the vicinity of the center of the first exhaust pipe passage 22 in the direction in which the central axis C1 extends, and the virtual line that crosses the first central point O1 in the vertical direction is defined as the first virtual line. Let L1. Further, a virtual line that crosses the central axis C1 passing through the downstream opening end 22a of the first exhaust pipe passage 22 in the vertical direction is defined as a second virtual line L2.

In the exhaust pipe 8 of the present embodiment, the curved portion 32 is curved so that the second virtual line L2 approaches the side surface 3a of the cylinder head 3 with respect to the first virtual line L1.
7 and 8, the catalytic converter 9 is provided with an exhaust sensor 10, and the exhaust sensor 10 detects the amount of oxygen in the exhaust gas. In FIG. 7, the exhaust sensor 10 faces the downstream opening end 22 a of the first exhaust pipe passage 22 and is installed on the partition wall 21 side.

  Specifically, an imaginary line extending along the central axis C1 on the downstream side of the first exhaust pipe passage 22 through the distal end inner peripheral surface 32e of the curved inner peripheral surface 32d on the back side of the curved outer surface 32b is a third imaginary line. This is assumed to be a virtual line L3. Further, a virtual line that passes through the lower end 21a of the partition wall 21 facing the side surface 2a of the cylinder block 2 and extends along the central axis C2 on the downstream side of the second exhaust pipe passage 23 is defined as a fourth virtual line L4. .

The exhaust sensor 10 of the present embodiment is installed between the third virtual line L3 and the fourth virtual line L4.
The partition wall 21 includes a first partition wall portion 21A that extends linearly outward from the exhaust flange portion 16, a second partition wall portion 21B that curves downward from the first partition wall portion 21A, and a second partition wall portion 21B. A third partition wall portion 21C extending linearly downward from the partition wall portion 21B is configured.

  The plate thickness T2 of the second partition wall 21B is formed larger than the plate thickness T1 of the first partition wall 21A, and the plate thickness T3 of the third partition wall 21C is the second partition wall. It is formed smaller than the plate thickness T2 of the portion 21B. That is, the partition wall 21 is formed such that the plate thickness gradually increases from the upstream side toward the downstream side and then gradually decreases toward the downstream side.

  The first exhaust pipe passage 22 and the second exhaust pipe passage 23 are formed such that the opening area on the downstream side connected to the catalytic converter 9 is larger than the upstream side connected to the exhaust flange portion 16.

  4 and 5, a first boss portion 35 and a second boss portion 36 are formed on the side surface 3 a of the cylinder head 3, and a third boss portion 37 is formed on the side surface 2 a of the cylinder block 2. Has been. The 1st boss | hub part 35 and the 2nd boss | hub part 36 of a present Example comprise the boss | hub part of this invention.

  In FIG. 5, the first boss portion 35 and the second boss portion 36 are provided adjacent to the exhaust flange portion 16 in the cylinder arrangement direction. The bulging portion 15 is formed above the second exhaust port 14 </ b> B in the height direction of the engine 1, and the first boss portion 35 includes the bulging portion 15, the lower end portion 3 b of the cylinder head 3, and the exhaust. It is formed in a space 52 surrounded by the flange portion 16.

  The exhaust flange portion 16 is connected to the bulging portion 15 and extends above and below the bulging portion 15 in the height direction of the engine 1.

  The second boss portion 36 is formed above the first boss portion 35 across the bulging portion 15 in the height direction of the engine 1 and is connected to the case flange portion 3F of the cylinder head 3. .

  The third boss portion 37 is formed in the cylinder block 2 so as to overlap the second boss portion 36 in the height direction of the engine 1. As shown in FIG. 5, the third boss portion 37 is formed above the center portion C <b> 3 in the height direction of the cylinder block 2.

  A mounting bracket 42 of a starter generator (Integrated Starter Generator) 41 shown in FIG. 3 is fastened to the first boss portion 35, the second boss portion 36, and the third boss portion 37 by bolts 43 (FIG. 9). reference).

  In FIG. 9, a boss portion 42 </ b> A is formed in the mounting bracket 42, and the boss portion 42 </ b> A extends in the left-right direction of the engine 1.

  In FIG. 3, the starter generator 41 is provided with an upper fastening portion 41A and a lower fastening portion 41B. The upper fastening portion 41A is provided on the starter generator 41, and the upper fastening portion 41A is fastened to the boss portion 42A of the mounting bracket 42 by a bolt 44A.

  The lower fastening portion 41B is provided at the lower part of the starter generator 41, and the lower fastening portion 41B is fastened to the cylinder block 2 by a bolt 44B.

  Thereby, the starter generator 41 is connected to the cylinder head 3 via the first boss portion 35 and the second boss portion 36 so that the mounting bracket 42 overlaps the exhaust flange portion 16 in the cylinder arrangement direction (front-rear direction). (See FIG. 1). The starter generator 41 of the present embodiment is configured to include a mounting bracket 42.

  An elastic body (not shown) is provided as a cushion between the boss portion 42A and the bolt 44A, and the vibration of the starter generator 41 is absorbed by the elastic body.

  In FIG. 3, the starter generator 41 includes a motor pulley 45, and the motor pulley 45 is coupled to a crank pulley 46 attached to the right end portion of the crankshaft 2 </ b> S via a transmission belt 47.

  In FIG. 1, an air conditioner compressor 49 is attached to the side surface 2 a of the cylinder block 2 below the starter generator 41. In FIG. 3, the air conditioner compressor 49 includes a compressor pulley 49 </ b> A, and the compressor pulley 49 </ b> A is connected to the crank pulley 46 by a transmission belt 47.

  The starter / generator 41 is rotated by being supplied with electric power, and functions as an electric motor that rotates the engine 1 via the transmission belt 47 and the rotational force input from the crankshaft 2S via the transmission belt 47 as electric power. It has the function of the generator to convert into.

  The air conditioner compressor 49 is driven by power transmitted from the crankshaft 2S via the transmission belt 47, and compresses the refrigerant to a high pressure.

  1 and 3, a tensioner member 50 is provided on the side surface 2 a of the cylinder block 2. The tensioner member 50 includes a tension roller 50A and a tension bracket 50B that rotatably supports the tension roller 50A.

  The tension roller 50 </ b> A is in contact with the transmission belt 47 and applies tension to the transmission belt 47. The tension bracket 50 </ b> B is fastened to the starter generator 41 by a bolt 51. As a result, the tensioner member 50 is stably supported by the starter generator 41 and can receive the reaction force from the transmission belt 47 and apply tension to the transmission belt 47.

  In FIG. 1, the tensioner member 50 is a space 53 surrounded by the third boss portion 37, the air conditioner compressor 49, the catalytic converter 9, and the chain case 5, and the starter generator 41 and the air conditioner in the height direction of the engine 1. It is installed at a position overlapping with the compressor 49.

  An auto tensioner 54 is provided on the side surface 2 a of the cylinder block 2, and the auto tensioner 54 adjusts the tension of the transmission belt 47 using hydraulic pressure or the like. The starter generator 41 of the present embodiment constitutes the auxiliary machine, the first auxiliary machine, and the rotating electric machine of the present invention, and the air conditioner compressor 49 constitutes the second auxiliary machine of the present invention.

  4 and 5, a boss portion 38 for the core is formed on the side surface 3 a of the cylinder head 3, and the boss portion 38 is used to form the core in the step of forming a water jacket (not shown) of the cylinder head 3. Used when removing. The boss portion 38 is closed by a plug 38A, and the plug 38A can prevent the cooling water from leaking from the water jacket to the outside of the cylinder head 3.

  A first rib 55, a second rib 56, and a third rib 57 are formed on the side surface of the cylinder head 3. The first rib 55 connects the first boss portion 35 and the second boss portion 36, and the first rib 55 is connected to the bulging portion 15 so as to cross the bulging portion 15. Yes.

  The second rib 56 extends upward from the first boss portion 35 so as to cross the bulging portion 15 and toward the exhaust flange portion 16, and the distal end portion in the extending direction is connected to the boss portion 38. ing.

  The third rib 57 extends in the lateral direction from the second boss portion 36 toward the exhaust flange portion 16, and the leading end portion in the extending direction is connected to the boss portion 38. Thereby, the front-end | tip part of the extension direction of the 2nd rib 56 and the front-end | tip part of the extension direction of the 3rd rib 57 are connected via the boss | hub part 38. FIG.

  A triangular rib (hereinafter, referred to as a triangular rib 58) is formed on the side surface 3a of the cylinder head 3 by the first rib 55, the second rib 56, and the third rib 57, and the triangular rib 58 has a bulging portion. 15 is connected to the exhaust flange portion 16 through 15.

  In FIG. 1, the exhaust pipe 8 and the catalytic converter 9 are installed so as to be separated from the starter generator 41 in the cylinder arrangement direction with respect to the exhaust flange portion 16, and the starter generator 41 is arranged in the exhaust pipe 8 in the cylinder arrangement direction. In addition, it is installed between the catalytic converter 9 and the case flange portions 2F and 3F (see FIG. 4).

  As described above, according to the auxiliary equipment mounting structure of the engine 1 of the present embodiment, the side surface 3a of the cylinder head 3 along the cylinder arrangement direction bulges outward from the side surface 3a of the cylinder head 3, and A bulging portion 15 extending along the arrangement direction and having exhaust passage portions 12A and 12D formed thereon, and projecting outward from the bulging portion 15 from the side surface 3a of the cylinder head 3, and the exhaust collecting portions 13A and 13B and the first The exhaust flange portion 16 in which the exhaust port 14A and the second exhaust port 14B are formed, and the first boss portion 35 and the second boss portion 36 to which the starter generator 41 is attached are formed.

  The first boss portion 35 is formed between the bulging portion 15 and the lower end portion 3b of the cylinder head 3, and the starter generator 41 overlaps the exhaust flange portion 16 in the cylinder arrangement direction. It is attached to the side surface 3 a of the cylinder head 3 via the boss part 35 and the second boss part 36.

  Accordingly, it is not necessary to provide an exhaust manifold projecting outward from the side surface 3a of the cylinder head 3 on the side surface 3a of the cylinder head 3, and the starter generator 41 is attached to the cylinder head 3 so as to avoid the exhaust manifold. Can be made unnecessary.

  For this reason, the starter generator 41 can be mounted upward on the side surface 3 a of the cylinder head 3. Therefore, the space below the starter generator 41 can be easily expanded as compared with the conventional engine, and the degree of freedom of installation of the air conditioner compressor 49 installed below the starter generator 41 can be improved.

  Furthermore, since the starter generator 41 can be installed upward on the side surface 3a of the cylinder head 3, when the starter generator 41 and the air conditioner compressor 49 are installed in the height direction of the engine 1, the dimensions in the height direction of the engine 1 are determined. Can be prevented from becoming large.

  As described above, the auxiliary machine mounting structure of the engine 1 according to this embodiment can prevent the size of the engine 1 from increasing in the height direction and can mount the starter generator 41 to the engine 1.

  Further, when the first boss portion 35 and the second boss portion 36 for mounting the starter generator 41 are formed on the exhaust manifold projecting outward from the side surface of the cylinder head as in the conventional engine, the starter The generator 41 may protrude greatly outward from the side surface of the cylinder head, and the size of the engine 1 in the front-rear direction may increase.

  On the other hand, in the auxiliary machine mounting structure of the engine 1 of the present embodiment, the first boss portion 35 and the second boss portion 36 for mounting the starter generator 41 are formed on the side surface 3 a of the cylinder head 3. Further, the starter generator 41 can be prevented from projecting outward from the side surface 3a of the cylinder head 3 and the size of the engine 1 in the front-rear direction can be prevented from increasing.

  Furthermore, since the first boss portion 35 and the second boss portion 36 are formed adjacent to the bulging portion 15 having high rigidity, the starter generator 41 is connected to the side surface of the cylinder head 3 via the mounting bracket 42. It can be firmly attached to 3a. For this reason, it is possible to stably support the starter generator 41 on the cylinder head 3 while suppressing the vibration of the starter generator 41 from being transmitted to the engine 1.

  Further, according to the auxiliary machine mounting structure of the engine 1 of the present embodiment, the cylinders are respectively installed on both sides of the cylinder head 3 in the cylinder arrangement direction, and the cylinders 2A and 2D in the cylinder arrangement direction. Cylinders 2B and 2C, which are sandwiched between the cylinders 2B and 2C.

  The exhaust passage portion formed inside the cylinder head 3 includes an exhaust passage portion 12A extending from the cylinder 2A through the bulging portion 15 to the exhaust flange portion 16, and an exhaust flange from the cylinder 2D via the bulging portion 15. An exhaust passage portion 12D extending to the portion 16 and exhaust passage portions 12B and 12C extending from the cylinders 2B and 2C to the exhaust flange portion 16 are provided.

  The exhaust collecting portion formed inside the cylinder head 3 includes an exhaust collecting portion 13A for collecting the exhaust passage portion 12A and the exhaust passage portion 12D, and an exhaust collecting portion 13B for collecting the exhaust passage portion 12B and the exhaust passage portion 12C. And.

  The exhaust port formed in the cylinder head 3 has a first exhaust port 14A communicating with the exhaust collecting portion 13A and a second exhaust port formed below the first exhaust port 14A and communicating with the exhaust collecting portion 13B. And an exhaust port 14B.

  The bulging portion 15 is formed above the second exhaust port 14 </ b> B in the height direction of the engine 1, and the first boss portion 35 includes the bulging portion 15, the lower end portion 3 b of the cylinder head 3, and the exhaust. It is formed in a space 52 surrounded by the flange portion 16.

  In this way, the bulging portion 15 is formed above the second exhaust port 14B with respect to the first exhaust port 14A and the second exhaust port 14B arranged in the height direction of the engine 1, and the first exhaust port 14A and the second exhaust port 14B. Since the boss portion 35 is formed in the space 52 surrounded by the bulging portion 15, the lower end portion 3 b of the cylinder head 3 and the exhaust flange portion 16, the starter generator 41 is positioned higher than the cylinder head 3. Can be installed.

  For this reason, the space below the starter generator 41 can be further expanded, and the degree of freedom of installation of the air conditioner compressor 49 installed below the starter generator 41 can be improved more effectively. As a result, it is possible to more effectively prevent the height dimension of the engine 1 from increasing.

  Further, according to the auxiliary machine mounting structure of the engine 1 of the present embodiment, the case flange portion 3F to which the chain case 5 covering the timing chain 6 is connected is formed at the right end portion of the cylinder head 3 in the arrangement direction of the cylinders. Yes.

  A first boss portion 35 formed between the bulging portion 15 and the lower end portion 3b of the cylinder head 3 is sandwiched between the bulging portion 15 in the height direction of the engine 1 and the side surface 3a of the cylinder head 3. A second boss portion 36 formed above the one boss portion 35 is formed, and the second boss portion 36 is connected to the case flange portion 3F.

  Thus, the first boss portion 35 can be adjacent to the bulging portion 15 having high rigidity, and the second boss portion 36 can be connected to the case flange portion 3F having high rigidity. The rigidity of the second boss portion 36 can be increased more effectively.

  Therefore, the starter generator 41 can be attached more firmly to the side surface 3a of the cylinder head 3 via the attachment bracket 42. For this reason, it is possible to more stably support the starter generator 41 by the cylinder head 3 while more effectively suppressing the vibration of the starter generator 41 from being transmitted to the engine 1.

  Further, according to the auxiliary machine mounting structure of the engine 1 of the present embodiment, the first rib 55 that connects the first boss portion 35 and the second boss portion 36 is formed on the side surface 3 a of the cylinder head 3. The first rib 55 is connected to the bulging portion 15 so as to cross the bulging portion 15.

  Therefore, the rigidity of the first boss portion 35 and the second boss portion 36 can be further increased by the first rib 55 and the bulging portion 15, and the starter generator 41 can be connected to the cylinder via the mounting bracket 42. The head 3 can be more firmly attached to the side surface 3a.

  In addition, according to the accessory mounting structure of the engine 1 of the present embodiment, the exhaust flange portion 16 is connected to the bulging portion 15. Furthermore, on the side surface 3a of the cylinder head 3, a second rib 56 extending upward from the first boss portion 35 so as to cross the bulging portion 15 and toward the exhaust flange portion 16, and a second boss portion A triangular rib 58 is formed by a third rib 57 that extends laterally from 36 toward the exhaust flange portion 16 and is connected to a distal end portion in the extending direction of the second rib 56 via a boss portion 38. . In addition, the triangular rib 58 is connected to the exhaust flange portion 16 via the bulging portion 15.

  Thereby, in addition to the rigidity of the 1st boss | hub part 35 and the 2nd boss | hub part 36, the rigidity of the side surface 3a of the cylinder head 3 can be improved with the triangular rib 58. FIG. Therefore, the starter generator 41 can be attached more firmly to the side surface 3a of the cylinder head 3 via the attachment bracket 42.

  Further, according to the auxiliary machine mounting structure of the engine 1 of the present embodiment, the auxiliary machine is configured by the starter generator 41. Since the exhaust pipe 8 and the catalytic converter 9 are not installed above the starter generator 41, the exhaust pipe 8 and the catalytic converter 9 are installed adjacent to the starter generator 41 in the left-right direction. It is possible to prevent the exhaust pipe 8 and the catalytic converter 9 from being exposed to the heat generated from the generator 41 and rising.

  For this reason, it can prevent that the exhaust gas which flows through the exhaust pipe 8 becomes high too much, and can prevent that the exhaust pipe 8 and the catalytic converter 9 receive heat damage. As a result, the exhaust pipe 8 and the catalytic converter 9 can be prevented from premature deterioration.

  Further, according to the auxiliary machine mounting structure of the engine 1 of the present embodiment, the exhaust pipe 8 connected to the exhaust flange portion 16 is installed so as to be separated from the starter generator 41 in the cylinder arrangement direction with respect to the exhaust flange portion 16. The starter generator 41 is installed between the exhaust pipe 8 and the catalytic converter 9 and the case flange portion 3F in the cylinder arrangement direction.

  As a result, the starter generator 41 can be installed close to the exhaust pipe 8 and the catalytic converter 9 with respect to the case flange portion 3F. For this reason, the dimension of the left-right direction of the engine 1 can be shortened, and the engine 1 can be reduced in size.

  Further, according to the auxiliary machine mounting structure of the engine 1 of the present embodiment, the third boss portion 37 to which the starter generator 41 is mounted is formed on the side surface 2a of the cylinder block 2 along the cylinder arrangement direction. The third boss portion 37 is formed above the center portion C <b> 3 in the height direction of the cylinder block 2.

  Further, an air conditioner compressor 49 connected to the starter generator 41 and the transmission belt 47 is attached to the side surface 2 a of the cylinder block 2 below the starter generator 41.

  In addition, a tensioner member 50 that applies tension to the transmission belt 47 is attached to the side surface 2 a of the cylinder block 2, and the tensioner member 50 includes the third boss portion 37, the air conditioner compressor 49, the catalytic converter 9, and the chain. It is installed in a space 53 surrounded by the case 5 and at a position overlapping the starter generator 41 and the air conditioner compressor 49 in the height direction of the engine 1.

  Accordingly, the tensioner member 50 is installed in the space 53 sandwiched between the starter generator 41 and the air conditioner compressor 49 in the space below the starter generator 41 that is larger than that of the conventional engine, thereby reducing the size of the engine 1. As shown, the starter generator 41 can be attached to the cylinder head 3.

  Further, since the air conditioner compressor 49 can be installed below the starter generator 41 and the tensioner member 50 can be covered from below by the air conditioner compressor 49, a stepping stone or the like can collide with the air conditioner compressor 49 when the vehicle is traveling. For this reason, a stepping stone or the like can be prevented from directly colliding with the tensioner member 50, and the tensioner member 50 can be protected.

  In addition, although the auxiliary machine of a present Example is comprised from the starter generator 41, it is not limited to this, You may be comprised from a motor or a generator.

  Moreover, although the front-end | tip part of the extending direction of the 2nd rib 56 of this Example and the front-end | tip part of the extending direction of the 3rd rib 57 are connected to the boss | hub part 38, the extending direction of the 2nd rib 56 is shown. You may connect directly a front-end | tip part and the front-end | tip part of the direction where the 3rd rib 57 is extended.

  While embodiments of the invention have been disclosed, it will be apparent to those skilled in the art that changes may be made without departing from the scope of the invention. All such modifications and equivalents are intended to be included in the following claims.

1 ... engine (internal combustion engine), 2 ... cylinder block, 2A ... cylinder (first outer cylinder), 2B ... cylinder (inner cylinder), 2C ... cylinder (inner cylinder), 2D ... cylinder (second outer cylinder), 2F ... case flange, 2a ... side (cylinder block side), 3 ... cylinder head, 3a ... side (cylinder head side) 3b ... lower end (lower end of cylinder head), 5 ... chain case, 6 ... timing chain, 8 ... exhaust pipe, 9 ... catalytic converter (exhaust pipe), 10. .. exhaust sensor, 11 ... exhaust passage, 12A ... exhaust passage portion (first outer exhaust passage portion), 12B ... exhaust passage portion (inner exhaust passage portion), 12C ... exhaust passage portion (Inner exhaust passage part), 12D ... exhaust passage part (second outer exhaust passage part), 13A ... exhaust collecting part (first exhaust collecting part), 13B ... exhaust collecting part (second of 14A ... first exhaust port (exhaust port), 14B ... second exhaust port (exhaust port), 15 ... bulge part, 16 ... exhaust flange part, 35 ... 1st boss part (boss part), 36 ... 2nd boss part (boss part), 37 ... 3rd boss part, 41 ... Starter generator (auxiliary machine, 1st Auxiliary machine, rotating electrical machine), 49 ... Air conditioner compressor (second auxiliary machine), 47 ... Transmission belt, 50 ... Tensioner member, 52 ... Space (bulging part and lower end of cylinder head) And a space surrounded by the exhaust flange portion), 53... Space (a space surrounded by the third boss portion, the second auxiliary device, the exhaust pipe and the chain case), 55. Ribs (ribs), 56 ... second ribs (ribs), 57 ... third ribs (ribs)
(The space surrounded by the third boss part, the second auxiliary machine, the exhaust pipe and the chain case)

The present invention includes a cylinder block having a plurality of cylinders arranged in a line, and a cylinder head provided at an upper portion of the cylinder block and having an exhaust passage for exhausting exhaust gas from the cylinder. The exhaust passage is provided for each cylinder, the exhaust passage portion through which the exhaust gas discharged from the cylinder flows, and the downstream side of the exhaust passage portion, each of which has at least two exhaust passage portions. An exhaust collecting portion that collects for each cylinder, and opens to a side surface of the cylinder head that communicates with the exhaust collecting portion along the arrangement direction of the cylinders, and exhaust gas flowing through the exhaust collecting portion An auxiliary machine mounting structure for an internal combustion engine including an exhaust port for discharging to the outside, wherein the side surface of the cylinder head bulges outward from the side surface; and A bulging portion extending along the arrangement direction of the cylinders and forming the exhaust passage portion, and an exhaust collecting portion and an exhaust port projecting outward from the bulging portion from the side surface of the cylinder head. An exhaust flange portion to be formed and a plurality of boss portions to which accessories are attached are formed, and at least one of the plurality of boss portions is formed between the bulging portion and a lower end portion of the cylinder head. The auxiliary machine is attached to the side surface of the cylinder head via the plurality of boss portions so as to be adjacent to the exhaust flange portion in the arrangement direction of the cylinders.

An auxiliary machine mounting structure for an internal combustion engine according to an embodiment of the present invention is provided with a cylinder block having a plurality of cylinders arranged in a row, and an upper portion of the cylinder block, and exhausts from a plurality of cylinders inside. A cylinder head formed with an exhaust passage for exhausting gas, an exhaust passage is provided for each cylinder, an exhaust passage portion through which exhaust gas discharged from the cylinder flows, and a downstream side of the exhaust passage portion, An exhaust collecting portion that collects at least two exhaust passage portions for each cylinder, and an exhaust gas that flows through the exhaust collecting portion and opens to the side surface of the cylinder head in communication with the exhaust collecting portion along the cylinder arrangement direction. An auxiliary machine mounting structure for an internal combustion engine that includes an exhaust port that discharges to the outside of a cylinder head, and swells outward from the side surface of the cylinder head, and the cylinder arrangement direction Attached to the bulging part extending along the exhaust passage part, the exhaust flange part projecting outward from the bulging part from the side surface of the cylinder head to form the exhaust collecting part and the exhaust port, and the auxiliary equipment And at least one of the plurality of boss portions is formed between the bulging portion and the lower end portion of the cylinder head. It is attached to the side surface of the cylinder head via a plurality of boss portions so as to be adjacent to the portion.

The third boss portion 37 is formed in the cylinder block 2 so as to be aligned with the second boss portion 36 in the height direction of the engine 1. As shown in FIG. 5, the third boss portion 37 is formed above the center portion C <b> 3 in the height direction of the cylinder block 2.

Thereby, the starter generator 41 is connected to the cylinder head via the first boss portion 35 and the second boss portion 36 so that the mounting bracket 42 is adjacent to the exhaust flange portion 16 in the cylinder arrangement direction (front-rear direction). 3 (see FIG. 1). The starter generator 41 of the present embodiment is configured to include a mounting bracket 42.

In FIG. 1, the tensioner member 50 is a space 53 surrounded by the third boss portion 37, the air conditioner compressor 49, the catalytic converter 9, and the chain case 5, and the starter generator 41 and the air conditioner in the height direction of the engine 1. It is installed at a position sandwiched between the compressor 49.

The first boss portion 35 is formed between the bulging portion 15 and the lower end portion 3b of the cylinder head 3, and the starter generator 41 is adjacent to the exhaust flange portion 16 in the cylinder arrangement direction. The boss portion 35 and the second boss portion 36 are attached to the side surface 3 a of the cylinder head 3.

In addition, a tensioner member 50 that applies tension to the transmission belt 47 is attached to the side surface 2 a of the cylinder block 2, and the tensioner member 50 includes the third boss portion 37, the air conditioner compressor 49, the catalytic converter 9, and the chain. It is installed in a space 53 surrounded by the case 5 and sandwiched between the starter generator 41 and the air conditioner compressor 49 in the height direction of the engine 1.

Claims (8)

A cylinder block having a plurality of cylinders arranged in a line; and a cylinder head provided at an upper portion of the cylinder block and having an exhaust passage for exhaust gas exhausting from the cylinder therein.
The exhaust passage is provided for each cylinder, an exhaust passage portion through which exhaust gas discharged from the cylinder flows, and a downstream side of the exhaust passage portion, and at least two of the exhaust passage portions are provided in each cylinder. An exhaust collecting portion that collects every time, and an exhaust gas that opens to the side of the cylinder head along the arrangement direction of the cylinders and communicates with the exhaust collecting portion, and exhaust gas flowing through the exhaust collecting portion to the outside of the cylinder head An auxiliary machine mounting structure for an internal combustion engine including an exhaust port for discharging,
The bulging portion that bulges outward from the side surface and extends along the arrangement direction of the cylinders and forms the exhaust passage portion on the side surface of the cylinder head, and the side surface of the cylinder head from the side surface. An exhaust flange portion that protrudes outward from the bulging portion to form the exhaust assembly portion and the exhaust port, and a plurality of boss portions to which the auxiliary machine is attached are formed.
At least one of the plurality of boss portions is formed between the bulging portion and a lower end portion of the cylinder head;
The auxiliary equipment mounting structure for an internal combustion engine, wherein the auxiliary equipment is attached to the side surface of the cylinder head via the boss portion so as to overlap the exhaust flange portion in the arrangement direction of the cylinders. A first outer cylinder and a second outer cylinder installed on both sides of the cylinder and the cylinder block in the arrangement direction of the cylinder; and the first outer cylinder and the second outer cylinder in the arrangement direction of the cylinder. An inner cylinder that is sandwiched between cylinders,
The exhaust passage portion includes a first outer exhaust passage portion extending from the first outer cylinder to the exhaust flange portion via the bulge portion, and from the second outer cylinder via the bulge portion. A second outer exhaust passage portion extending to the exhaust flange portion, and an inner exhaust passage portion extending from the inner cylinder to the exhaust flange portion,
The exhaust collecting portion includes a first exhaust collecting portion for collecting the first outer exhaust passage portion and the second outer exhaust passage portion, and a second exhaust collecting portion for collecting the inner exhaust passage portion. With
The exhaust port includes a first exhaust port communicating with the first exhaust collecting portion, and a second exhaust port formed below the first exhaust port and communicating with the second exhaust collecting portion. With
The bulging portion is formed above the second exhaust port in the height direction of the internal combustion engine,
2. The internal combustion engine according to claim 1, wherein at least one of the plurality of boss portions is formed in a space surrounded by the bulging portion, a lower end portion of the cylinder head, and the exhaust flange portion. Auxiliary mounting structure. A case flange portion connected to a chain case that covers the timing chain is formed at an end of the cylinder head in the arrangement direction of the cylinders,
The plurality of boss portions include a first boss portion formed between the bulging portion and a lower end portion of the cylinder head, and the first boss portion sandwiching the bulging portion in the height direction of the internal combustion engine. And a second boss portion formed above the boss portion of
The auxiliary machine mounting structure for an internal combustion engine according to claim 1 or 2, wherein the second boss portion is connected to the case flange portion. Ribs for connecting the first boss portion and the second boss portion are formed on the side surface of the cylinder head,
4. The auxiliary machine mounting structure for an internal combustion engine according to claim 3, wherein the rib is connected to the bulging portion so as to cross the bulging portion. The exhaust flange portion is connected to the bulge portion,
When the rib is a first rib, a second side extending from the first boss portion and extending toward the exhaust flange portion on the side surface of the cylinder head so as to cross the bulging portion. By forming a rib and a third rib extending in a lateral direction from the second boss portion toward the exhaust flange portion and connected to a tip portion in a direction in which the second rib extends, A triangular rib is formed by the first rib, the second rib, and the third rib,
The auxiliary machine attachment structure for an internal combustion engine according to claim 4, wherein the triangular rib is connected to the exhaust flange portion through the bulging portion.   The auxiliary machine mounting structure for an internal combustion engine according to any one of claims 1 to 5, wherein the auxiliary machine includes a rotating electric machine. An exhaust pipe extending in the height direction of the internal combustion engine is connected to the exhaust flange portion,
The exhaust pipe is installed so as to be separated from the auxiliary machine in the cylinder arrangement direction with respect to the exhaust flange portion,
The internal combustion engine according to any one of claims 3 to 6, wherein the auxiliary machine is installed between the exhaust pipe and the case flange portion in the arrangement direction of the cylinders. Auxiliary mounting structure. A third boss portion to which the auxiliary machine is attached is formed on a side surface of the cylinder block along the arrangement direction of the cylinders,
The third boss part is formed above the center part in the height direction of the cylinder block,
When the auxiliary machine is a first auxiliary machine, a second auxiliary machine connected to the first auxiliary machine by a transmission belt is provided on the side surface of the cylinder block at the lower part of the first auxiliary machine. Installed,
A tensioner member that applies tension to the transmission belt is attached to the side surface of the cylinder block,
The tensioner member is a space surrounded by the third boss portion, the second auxiliary device, the exhaust pipe, and the chain case, and the first auxiliary device in the height direction of the internal combustion engine. The auxiliary machine attachment structure for an internal combustion engine according to any one of claims 3 to 7, wherein the auxiliary machine attachment structure is installed at a position overlapping with the second auxiliary machine.

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