JP3883381B2 - Auxiliary unit block for internal combustion engine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an accessory unit block that is detachably attached to an engine body of an internal combustion engine and in which another accessory is arranged in an accessory unit block in which a pump housing and an oil filter case are integrated. Is.
[0002]
[Prior art]
In the conventional internal combustion engine, the cooling water pump, the oil filter, the oil cooler, and the auxiliary machine for the AC generator are separately detachably mounted on the engine body such as a cylinder block of the internal combustion engine. .
[0003]
[Problems to be solved by the invention]
In the above-described conventional internal combustion engine, various auxiliary machines must be mounted on the internal combustion engine body so as not to interfere with each other. Therefore, the arrangement of the auxiliary machine is restricted, and the auxiliary machine projects from the internal combustion engine body. It was difficult to make the entire engine compact.
[0004]
[Means for Solving the Problems]
The present invention relates to an improvement of an auxiliary machine structure of an internal combustion engine that has overcome such difficulties, and is an auxiliary machine unit block that is detachably attached to an engine body of the internal combustion engine. A water pump housing and an oil filter case are formed integrally with the cooling water pump housing. And formed into a cylindrical shape, The cooling water pump housing; Cylindrical Between oil filter cases Outside surface A recess is formed in the recess, Another auxiliary machine is disposed over an endless belt driven by a crankshaft, and one end of the other auxiliary machine is attached to at least the outer surface of the cylinder of the cylindrical oil filter case It is characterized by this.
[0005]
Since the cooling water pump housing and the oil filter case are integrated as described above, the invention according to claim 1 does not require the cooling water pump and the oil filter to be separately mounted on the internal combustion engine body. Assembly and maintenance are improved.
[0006]
Then, the oil filter case protrudes from the cooling water pump housing, and between the cooling water pump housing and the oil filter case. Recesses formed in Since the other auxiliary machine is disposed in the internal combustion engine, the entire internal combustion engine can be downsized.
[0007]
Further, by configuring the invention as described in claim 2, the other auxiliary machine can be supported on a cylindrical oil filter case having high strength and rigidity without the need for a mounting bracket or the like. Other auxiliary machines can be firmly supported, and the number of parts can be reduced to reduce weight and cost.
[0008]
Further, by configuring the invention as claimed in claim 3, the oil filter case and the cooling water pump housing are integrally coupled with the rib formed in the recess, and as a result, sufficient auxiliary machine Support rigidity can be obtained and downsizing can be achieved.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention shown in FIGS. 1 to 13 will be described below.
[0010]
As shown in FIGS. 1 and 2, the internal combustion engine 1 is an overhead camshaft type water-cooled in-line four-cylinder stroke cycle internal combustion engine. The internal combustion engine 1 has an axial direction of a crankshaft 8 of an automobile. It is mounted on an automobile in a state of being oriented in the width direction, and an auxiliary machine drive system is disposed on the right side (left side in FIG. 2) of the internal combustion engine 1.
[0011]
The engine body 2 of the internal combustion engine 1 includes a cylinder block 3, a cylinder head 4, a head cover 5, a lower block 6, and an oil pan 7. The cylinder block 3 and the cylinder head 4 are sequentially placed on the upper end of the cylinder block 3. The lower block 6 is integrally coupled to the lower end of the cylinder block 3, and the oil pan 7 is integrally coupled to the lower end of the lower block 6, so that the cylinder block 3 and the lower block 6 are connected together. A crankshaft 8 is rotatably supported on the mating surface via a main bearing (not shown).
[0012]
Further, four cylinder bores (not shown) are formed in the cylinder block 3 in the crankshaft 8 direction, that is, in the vehicle width direction, and pistons (not shown) are slidably fitted in the cylinder bores. The crankshaft 8 is connected by a connecting rod (not shown), and the crankshaft 8 is driven to rotate by reciprocating the piston.
[0013]
Furthermore, as shown in FIG. 2 when the internal combustion engine 1 is viewed from the front of the vehicle body, an intake device 9 including an intake manifold or the like is disposed on the front surface (right side in FIG. 1) of the cylinder block 3. On the rear surface (left side in FIG. 1), an exhaust device 10 including an exhaust manifold is disposed. In addition, front and rear, right and left in the specification means front and rear and right and left of the automobile.
[0014]
A cam shaft (not shown) for opening and closing an intake valve (not shown) of the intake device 9 and an exhaust valve (not shown) of the exhaust device 10 is directed in a direction parallel to the crankshaft 8. A driven sprocket (not shown) that is rotatably supported by the cylinder head 4 and is fitted to the right end (front side in FIG. 1, left side in FIG. 2) of the cam shaft, and a drive provided on the right side of the crank shaft 8 A timing chain (not shown) is laid over the sprocket, and these are sealed by a timing chain cover 11 that is detachably attached to the engine body 2. The intake valve and the exhaust valve are rotated along with the rotation of the crankshaft 8. The camshaft is rotationally driven and is opened and closed in the same manner as a normal 4-stroke cycle internal combustion engine.
[0015]
Further, a hydraulic power steering hydraulic pump 12, which is a kind of auxiliary machine, is located in front of the cylinder head 4 on the right side (front right side in FIG. 1 and front left side in FIG. 2) via a bracket 13. 4, and an air conditioning compressor 14 is mounted on the right front side of the lower block 6 via a bracket 15. A driven pulley 16 is mounted on the rotary shaft of the hydraulic power steering hydraulic pump 12 and the air conditioning compressor 14, respectively. A driven pulley 17 is fitted, and a drive pulley 18 is fitted to the right end of the crankshaft 8.
[0016]
Further, an auxiliary machine unit block 20 is detachably and integrally mounted on the cylinder block 3 as will be described in detail later, positioned between the hydraulic power steering hydraulic pump 12 and the air conditioning compressor 14. The accessory unit block 20 is made of an aluminum alloy and, as shown in FIG. 3, includes a pump housing 22 of a cooling water pump 21 and a cylindrical filter case 25 of an oil filter 24. The cylindrical filter case 25 is integrally cast by die casting or the like.
[0017]
Furthermore, as shown in FIG. 3, the auxiliary unit block 20 is detachably mounted with an oil cooler 27 for cooling the lubricating oil filtered by the oil filter 24. A thermostat 28 and a tensioner 29 are detachably attached to the unit block 20, and the thermostat 28 allows the cooling water discharged from the engine body 2 to pass through the bypass passage and the warming-up operation when the cooling water temperature is below a predetermined water temperature. When the engine is recirculated to the engine body 2 via a bypass pipe 75 (see FIG. 2) and the cooling water temperature is higher than a predetermined water temperature, the cooling water discharged from the engine body 2 is cooled by a radiator or an oil cooler 27 (not shown). It is made to return to the engine body 2 through a water passage.
[0018]
Further, as shown in FIG. 3, an upper support arm 30 is integrally provided on the outer surface of the cylindrical filter case 25 facing the pump housing 22 of the accessory unit block 20, and A pair of left and right lower support arms 31 are integrally projected on the outer surface of the pump housing 22 facing the cylindrical filter case 25 of the unit block 20, and AC power generation is performed on the upper support arm 30 and the lower support arm 31. With the bracket 33 and the bracket 34 (see FIG. 1) of the machine 32 applied, the bolts 35 and 36 penetrate the upper support arm 30, the bracket 33, the lower support arm 31 and the bracket 34, respectively. Accordingly, the AC generator 32 is detachably attached to the auxiliary machine unit block 20.
[0019]
Further, as shown in FIG. 1, a driven pulley 37 is integrally fitted on a rotation shaft integral with an impeller (not shown) rotatably supported by a pump body 23 of the cooling water pump 21. A driven pulley 38 is integrally fitted on the rotating shaft of the AC generator 32, an idler pulley 39 is provided on the tensioner 29, a drive pulley 18 integrated with the crankshaft 8, a driven pulley 17, a driven pulley 37, and a driven pulley. 38, endless belt 40 is laid over driven pulley 16 and idler pulley 39, and when crankshaft 8 rotates, hydraulic power steering hydraulic pump 12, air conditioning compressor 14, cooling water pump 21, AC power generation The machines 32 are rotationally driven all at once.
[0020]
Next, the specific structure of the accessory unit block 20 will be described in more detail.
[0021]
FIG. 3 shows the pump body 23 of the cooling water pump 21 from the auxiliary machine unit block 20, the filter element 26 and the filter cap 41 of the oil filter 24, the oil cooler 27, the thermostat 28, the tensioner 29, and the AC generator 32. 4 is a schematic perspective view illustrating the main part of the auxiliary machine unit block 20, and the rotation axis direction of the cooling water pump 21 is the axis of the crankshaft 8 oriented in the vehicle width direction. The pump housing 22 of the cooling water pump 21 is disposed below the abutting and tightening portion 42 of the accessory unit block 20 with respect to the cylinder block 3 (see FIGS. 3 and 7). A cylindrical filter case 25 of the oil filter 24 is integrally formed so as to be directed obliquely upward and obliquely upward. As shown in FIG. The connecting rib 99 that connects the holding arms 31 to each other and the cylindrical filter case 25 are integrally connected by a reinforcing rib 44.
[0022]
Also, the pump housing 22 of the cooling water pump 21 located on the right side of the accessory unit block 20 (left side in FIG. 3) is a contact clamping wall for forming a cooling water discharge passage 45 with the pump body 23. Is formed on the left side of the accessory unit block 20 to form an oil cooler contact tightening wall portion 48 (see FIGS. 4 and 8) for the oil cooler 27, and the oil cooler contact tightening A thermostat abutting / clamping wall part 50 for the thermostat 28 is formed below the wall part 48. As shown in FIG. 8, the oil cooler abutting / clamping wall part 48 and the thermostat abutting / clamping wall part 50 are connected to each other. Reinforcing ribs 52 to be joined are integrally formed, and these abutting and tightening wall portions 46, oil cooler abutting and tightening wall portions 48, thermostat abutting and tightening wall portions 50 and reinforcing ribs 52 are formed into blocks. Cal load, the load is dispersed, a cylindrical filter case 25 of the pump housing 22 and the oil filter 24 of the cooling water pump 21 is turned as strong as a unit.
[0023]
Further, as shown in FIG. 6, the contact tightening surface 43 formed on the end surface of the contact tightening portion 42 of the accessory unit block 20 with respect to the cylinder block 3 is cooled to communicate with the cooling water discharge passage 45. The water inlet 53 is formed, and an oil inlet 54 communicating with an oil discharge passage of an oil pump (not shown) in a crank chamber (not shown) sealed by the lower block 6 and the oil pan 7 is provided with cooling water. The oil inlet 54 is formed below the discharge port 53, and the oil inlet 54 is formed in a cylindrical filter case 25 via an oil inflow passage 55 formed in the accessory unit block 20, as shown in FIG. It communicates with the inner cylindrical space 56. As shown in FIG. 5, the oil inflow passage 55 is located on the right side (left side in FIG. 5) from the center of the cylindrical space 56 in the cylindrical filter case 25.
[0024]
Further, as shown in FIG. 5, in the accessory unit block 20, the auxiliary unit unit block 20 is positioned in the center of the cylindrical space 56 parallel to the oil inflow passage 55 and on the left side (right side in FIG. 5). An oil outflow passage 57 is formed, and as shown in FIGS. 9 and 10, the oil outflow passage 57 is communicated with an oil outlet 59 shown in FIG. 8 via an oil communication passage 58 branched at a right angle. The oil discharged from the oil pump flows into the cylindrical space 56 from the oil inlet 54 through the oil inflow passage 55, and is filtered by the filter element 26, and the oil introduction hole in the filter element 26 60 (see FIG. 3) is led to an oil outlet 59 (see FIGS. 5 and 8) through an oil outflow passage 57 and an oil communication passage 58 (see FIGS. 9 and 10).
[0025]
Moreover, the oil cooled by the cooling water in the oil cooler 27 is guided to the oil inlet 61 of the oil cooler contact tightening surface 49, and the oil inlet 61 is shown in FIGS. As described above, the oil gallery 65 of the cylinder block 3 is supplied through the oil communication passage 62 and the oil inflow passage 63.
[0026]
The lower extension opening 57a of the oil outflow passage 57 communicates with the crank chamber 67 via the communication passage 66 of the cylinder block 3 as shown in FIG. 9, and the filter element 26 is connected to the cylindrical filter case. 25, the oil outflow passage 57 and the lower extension opening 57a are blocked by the lower protrusion 26a of the filter element 26, and the filter element 26 is taken out from the cylindrical filter case 25. In this case, the oil outflow passage 57 and the downward extension opening 57a are in communication with each other, and the oil in the cylindrical filter case 25 is discharged into the crank chamber 67 and accumulated on the oil pan 7.
[0027]
Further, the cooling water discharge passage 45 of the cooling water pump 21 communicates with the cooling water discharge port 53 at the contact and tightening surface 43 to the cylinder block 3 as described above, and is shown in FIGS. In this way, the oil cooler contact tightening surface 49 of the oil cooler contact tightening wall portion 48 communicates with the coolant outlet 69 to the oil cooler 27 via the coolant water passage 68, and the oil cooler 27 exchanges heat with oil. As shown in FIG. 4, the cooling water receiving port 70 for receiving the cooling water communicated with the cooling water intake passage 73 via the cooling water communication passage 71 and the cooling water communication passage 72 orthogonal thereto. One end of the cooling water suction passage 73 is connected to the suction port of the cooling water pump 21 and the other end of the cooling water suction passage 73 is connected to the thermostat opening 74 of the thermostat 28.
[0028]
Further, the thermostat 28 is connected to a bypass pipe 75 (see FIG. 2) for returning the cooling water that has passed through the cooling water jacket (not shown) of the cylinder block 3 and the cylinder head 4 to the cooling water pump 21 as it is. A connection joint 76 for receiving a hose (not shown) connected to a cooling water outlet of a radiator (not shown) is provided.
[0029]
Further, the contact tightening surface 43 of the contact tightening portion 42 of the accessory unit block 20 is provided with the cooling water discharge port 53 and the oil inflow passage 63 as shown in FIGS. The annular O-ring grooves 100 and 101 are formed so as to surround the outer peripheries of the oil inlet 54 and the eight-letter shaped so as to surround the outer peripheries of the oil inlet 54 and the lower extension opening 57a of the oil outlet passage 57, respectively. O-ring grooves 102 are formed, and O-rings made of soft synthetic resin (not shown) are fitted into the O-ring grooves 100, 101, 102, respectively.
[0030]
Next, a structure in which the accessory unit block 20 is abutted and tightened to the cylinder block 3 will be described.
[0031]
As shown in FIG. 6, a tightening bolt hole 77 and a tightening bolt hole 78 are provided on the contact tightening surface 43 on which the auxiliary machine unit block 20 is contacted and tightened to the cylinder block 3 as shown in FIG. In addition, a tightening bolt hole 79 is provided at a corner located on the obliquely upper side of the cooling water discharge port 53. A tightening bolt hole 80 is provided, and a tightening bolt hole 81 is provided near the lower end at substantially the same width position as the tightening bolt hole 80, and is positioned below the oil inlet 54 at substantially the same height as the tightening bolt hole 81. There are six bolt holes 82, six bolt holes 77, six bolt holes 78, six bolt holes 79, six bolt holes 80, six bolt holes 81, and six bolt holes 82 penetrating each other. Not shown There By tightened screwed into the screw hole of the cylinder block 3, the accessory unit block 20 is adapted to be coupled integrally with the cylinder block 3.
[0032]
Further, a reinforcing rib 86 is formed from the tightening boss portion 83 surrounding the tightening bolt hole 80 toward the tightening bolt hole 77, and a reinforcing rib 87 is formed from the tightening boss portion 83 toward the tightening bolt hole 79. A reinforcing rib 88 is formed from the tightening boss portion 84 surrounding the bolt hole 81 toward the tightening bolt hole 78, and a reinforcing rib 89 is formed from the tightening boss portion 84 toward the tightening boss portion 85 surrounding the tightening bolt hole 82. A reinforcing rib 90 is formed from the tightening boss portion 85 toward the oil inlet 54.
[0033]
Further, on the side where the oil cooler 27 is provided, as shown in FIGS. 4, 5, and 8, the left side central portion of the cylindrical filter case 25 extends along the longitudinal direction of the cylindrical filter case 25. The reinforcing rib 91 is formed from the tubular filter case 25 toward the oil cooler abutting and tightening wall portion 48, and the reinforcing rib 92 is formed from the reinforcing rib 91 toward the upper support arm 30, as shown in FIGS. As shown in the drawing, a reinforcing rib 93 is formed from the thermostat abutting / clamping wall portion 50 toward the lower support arm 31.
[0034]
Finally, the tensioner contact tightening portion 94 of the tensioner 29 will be described.
[0035]
As shown in FIG. 10, a tensioner contact tightening portion 94 is formed between the cylindrical filter case 25 of the oil filter 24 and the reinforcing rib 87, and the tensioner contact tightening is performed as shown in FIG. The end surface 29a of the tensioner 29 is brought into contact with the tensioner contact tightening surface 95 of the portion 94, and a mounting screw 97 is passed through a mounting support arm 96 projecting from the tensioner 29. The mounting screw 97 passes through the cylindrical filter case 25. It is designed to be screwed to the adjacent mounting boss portion 98.
[0036]
In the embodiment of the present invention shown in FIGS. 1 to 13, as described above, the pump housing 22 of the cooling water pump 21 and the cylindrical filter case 25 of the oil filter 24 are integrated with each other. The number of points is reduced, the size and weight are reduced, and the mounting and dismounting to the cylinder block 3 can be easily performed during assembly, maintenance, and maintenance, and the cost can be greatly reduced.
[0037]
Further, since the oil cooler 27, the thermostat 28, the tensioner 29, and the AC generator 32 are integrally attached to the auxiliary unit block 20 in which the cooling water pump 21 and the oil filter 24 are integrated, the auxiliary unit of the internal combustion engine 1 is integrated. As a whole, the entire internal combustion engine 1 can be reduced in size.
[0038]
Further, since the oil filter 24 and the oil cooler 27 are disposed adjacent to each other, the oil passage is shortened and the oil flow path resistance is reduced.
[0039]
Furthermore, since the thermostat 28 is disposed close to the rotation axis of the impeller of the cooling water pump 21, the cooling water passage is shortened and simplified, and the cooling water passage resistance is reduced.
[0040]
In addition, a contact and tightening surface 43 for the cylinder block 3 is disposed between the pump housing 22 of the cooling water pump 21 and the cylindrical filter case 25 of the oil filter 24, which are constituent parts of the auxiliary unit block 20. Even if the vibration caused by the operation of the internal combustion engine 1 or the inertial force due to the acceleration / deceleration of the automobile is applied, the contact tightening surface 43 can be brought into contact with the cylinder block 3 uniformly. 3 can be stably and firmly attached.
[0041]
Further, among the three tightening bolt holes 77, the tightening bolt holes 78, and the tightening bolt holes 79 on the contact tightening surface 43, the tightening bolt hole 77 is disposed adjacent to the oil cooler 27. Various forces applied can be stably and firmly applied to the bolts that have passed through the tightening bolt holes 77, and the tightening strength and rigidity of the accessory unit block 20 can be increased.
[0042]
Further, the tightening bolts 77, 78, 79 provided on the contact tightening surface 43 that contacts the cylinder block 3 are positioned at the same height as the tightening bolt holes 79 and close to the tightening bolt holes 77, 78. The bolt hole 80 and a clamping bolt hole 81 provided on the lower side opposite to the clamping bolt hole 80 across the clamping bolt holes 77 and 78, and a clamping bolt having the same height as the clamping bolt hole 81 on the clamping bolt hole 79 side Since the accessory unit block 20 is additionally tightened to the cylinder block 3 with the hole 82, the accessory unit block 20 can be coupled to the cylinder block 3 more firmly and stably.
[0043]
Furthermore, the fastening bolt hole 77 and the fastening bolt hole 80 are reinforced and joined by the reinforcing rib 86, and the fastening bolt hole 79 and the fastening bolt hole 80 are reinforced and joined by the reinforcing rib 87, and the fastening bolt hole 78 and the fastening bolt hole 81 are joined. Are tightened with the reinforcing rib 88, the tightening bolt hole 81 and the tightening bolt hole 82 are reinforced with the reinforcing rib 89, and the tightening bolt hole 82 and the contact tightening portion 42 are reinforced with the reinforcing rib 90. Tightening bolt holes 80 positioned outside the abutting tightening portion 42 with respect to three bolts (not shown) that pass through the tightening bolt holes 77, 78, 79 provided in the portion 42 and are screwed to the cylinder block 3. , 81, 82 are screwed and fastened to the cylinder block 3, and the bolts (not shown) can also serve to fasten the accessory unit block 20 to the cylinder block 3 to the same extent. As a result, the accessory unit The lock 20 can be uniformly contact coupled to the cylinder block 3.
[0044]
The O-rings (not shown) fitted in the O-ring grooves 100, 101, 102 are respectively provided with fastening bolts penetrating the six fastening bolt holes 77, 78, 79, 80, 81, 82, respectively. Since the cooling water discharge port 53, the oil inlet 54, the oil groove outlet passage lower extension opening 57a, and the oil inflow passage 63 are securely sealed, the cooling water in the cooling water passage The oil in the passage does not leak or mix with each other.
[0045]
In addition, in the accessory unit block 20, the pump housing 22 of the cooling water pump 21 and the cylindrical filter case 25 of the oil filter 24 are in contact with the contact tightening wall 46, the oil cooler contact tightening wall 48, and the thermostat. Tightening wall 50, both oil cooler abutting clamping wall 48, reinforcing rib 52 for coupling thermostat abutting clamping wall 50, connecting rib 99 for coupling two lower support arms 31 to each other, and cylindrical filter Since the reinforcing ribs 44 that connect the case 25 are reinforced and coupled to each other, the accessory unit block 20 can firmly support the heavy AC generator 32.
[0046]
In the embodiment shown in FIGS. 1 to 13, as shown in FIG. 6, the O-ring groove 102 on the outer periphery of the oil inlet 54 and the lower extension opening 57 a of the oil outlet passage 57 surrounds in an eight-letter shape. However, as shown in FIG. 14, the annular O-ring grooves 103 and 104 may be formed so as to separately surround the oil inlet 54 and the lower extension opening 57a of the oil outlet 59, respectively. In this embodiment, a commercially available O-ring is sufficient as the O-ring fitted in the O-ring grooves 103 and 104.
[Brief description of the drawings]
FIG. 1 is a right side view of an internal combustion engine provided with an accessory unit block according to the present invention.
2 is a front view of the internal combustion engine shown in FIG. 1. FIG.
3 is an exploded perspective view of the accessory unit block shown in FIG. 1. FIG.
4 is a schematic perspective view of the accessory unit block shown in FIG. 3. FIG.
FIG. 5 is a front view of the accessory unit block shown in FIG. 3;
6 is a rear view of the accessory unit block shown in FIG. 3. FIG.
7 is a right side view of the accessory unit block shown in FIG. 3. FIG.
FIG. 8 is a left side view of the accessory unit block shown in FIG. 3;
9 is a longitudinal sectional view taken along line IX-IX in FIG.
10 is a longitudinal sectional view cut along a line XX in FIG. 5. FIG.
11 is a longitudinal sectional view taken along line XI-XI in FIG.
12 is a longitudinal sectional view cut along line XII-XII in FIG. 6;
13 is a longitudinal sectional view taken along line XIII-XIII in FIG.
FIG. 14 is a rear view of an accessory unit block according to another embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Internal combustion engine, 2 ... Engine main body, 3 ... Cylinder block, 4 ... Cylinder head, 5 ... Head cover, 6 ... Lower block, 7 ... Oil pan, 8 ... Crankshaft, 9 ... Intake device, 10 ... Exhaust device, 11 ... Timing chain cover, 12 ... Hydraulic pump for hydraulic power steering, 13 ... Bracket, 14 ... Air conditioning compressor, 15 ... Bracket, 16 ... Driven pulley, 17 ... Driven pulley, 18 ... Drive pulley, 20 ... Auxiliary unit block , 21 ... Cooling water pump, 22 ... Pump housing, 23 ... Pump body, 24 ... Oil filter, 25 ... Tubular filter case, 26 ... Filter element, 27 ... Oil cooler, 28 ... Thermostat, 29 ... Tensioner, 30 ... Above Support arm, 31 ... Lower support arm, 32 ... Alternator, 33 ... Bracket, 34 ... Bracket, 35 ... Bolt, 36 ... Bolt, 37 ... Driven pulley, 38 ... driven pulley, 39 ... idler pulley, 40 ... endless belt, 41 ... filter cap, 42 ... contact tightening part, 43 ... contact tightening surface, 44 ... reinforcing rib, 45 ... cooling water discharge passage, 46 ... contact tightening Wall part, 47: Contact clamping surface, 48 ... Oil cooler contact clamping wall part, 49 ... Oil cooler contact clamping surface, 50 ... Thermostat contact clamping wall part, 51 ... Thermostat contact clamping surface, 52 ... Reinforcement rib 53 ... Cooling water discharge port, 54 ... Oil inflow port, 55 ... Oil inflow passage, 56 ... Cylindrical space, 57 ... Oil outflow passage, 58 ... Oil communication passage, 59 ... Oil outflow port, 60 ... Oil introduction hole, 61 ... Oil inlet, 62 ... Oil communication passage, 63 ... Oil inflow passage, 64 ... Oil inlet, 65 ... Oil gallery, 66 ... Communication passage, 67 ... Crank chamber, 68 ... Cooling water passage, 69 ... Cooling water outlet , 70 ... Cooling water receiving port, 71 ... Cooling water passage, 72 ... Cooling water passage, 73 ... Cooling Water intake passage, 74 ... Thermostat opening, 75 ... Bypass pipe, 76 ... Connection joint, 77, 78, 79, 80, 81, 82 ... Tightening bolt hole, 83, 84, 85 ... Tightening boss, 86, 87, 88 , 89, 90, 91, 92, 93 ... Reinforcing ribs, 94 ... Tensioner contact tightening part, 95 ... Tensioner contact tightening surface, 96 ... Mounting support arm, 97 ... Mounting screw, 98 ... Mounting boss part, 99 ... Connection Rib, 100, 101, 102, 103, 104 ... O-ring groove.

Claims (2)

An accessory unit block that is detachably attached to an engine body of an internal combustion engine,
Auxiliary device unit block becomes more and coolant pump housing and the oil filter case, the oil filter case, the are cooling water pump is housing integrally formed is formed on Rutotomoni tubular,
A recess is formed on the outer surface between the cooling water pump housing and the cylindrical oil filter case,
In the recess , another auxiliary machine that is placed on an endless belt driven by a crankshaft is disposed, and one end of the other auxiliary machine is attached to at least the outer surface of the cylinder of the cylindrical oil filter case. An auxiliary machine unit block for an internal combustion engine. The accessory unit block for an internal combustion engine according to claim 1, wherein a rib for connecting the cylindrical oil filter case and the cooling water pump housing is formed in the recess .

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