JP6376144B2 - Engine cooling system - Google Patents

Description

  The present invention relates to an engine cooling structure in which engine coolant flows in a water jacket provided in a cylinder block and a cylinder head.

  Conventionally, a cooling device for cooling an in-line multi-cylinder engine is known, and an example thereof is disclosed in Patent Document 1. A cooling device described in Patent Document 1 includes a water jacket formed on an engine body having a cylinder block and a cylinder head, a coolant inlet portion formed at one end of the engine body in the cylinder row direction, and the engine body. A coolant outlet formed at the other end in the cylinder row direction, a water pump provided at the coolant inlet and supplying the water jacket to the water jacket via the coolant inlet, and an engine body The radiator side coolant introduction part for introducing the coolant is provided on the other end side in the cylinder row direction, and the radiator side coolant introduction part for extracting the coolant is provided in the cylinder. A radiator having one end in the row direction, a thermostat that is provided at the cooling liquid outlet and that controls the flow rate of the cooling liquid flowing to the radiator; And it includes a first cooling water pipe connecting the said thermostat and the radiator side cooling liquid inlet portion, and a second cooling water pipe connecting the said water pump and the radiator side cooling liquid deriving unit.

  In this cooling device, the coolant is supplied from the water pump to the water jacket, and the coolant is introduced into the radiator while its flow rate is controlled by a thermostat to dissipate heat. The coolant that dissipated heat from the radiator is introduced into the water pump. That is, a coolant circulation path in which a water pump, a water jacket, a thermostat, a first coolant pipe, a radiator, and a second coolant pipe are connected in order from the upstream side in the coolant flow direction.

Japanese Patent Laying-Open No. 2015-71955

  In the cooling device described in Patent Document 1, the water pump and the thermostat are arranged at positions separated from each other on one end side and the other end side in the cylinder row direction in the engine body. Becomes longer. As a result, there is a problem that the amount of the coolant flowing through the coolant circulation path increases, and the warm-up performance of the engine body cannot be sufficiently ensured. In addition, when arranging a thermostat (flow control valve) that adjusts the flow of coolant on the same end side as the water pump, the layout is devised in relation to the multiple auxiliary machines driven by the engine and the engine mount position. There is also a problem that must be done.

  The present invention has been made in view of the above circumstances. When the flow control valve and the water pump are arranged on the same side, the arrangement of the flow control valve is devised, and the length of the piping of each coolant passage is devised. An object of the present invention is to provide an engine cooling device that can prevent the engine from becoming longer and ensure the warm-up performance of the engine body.

In order to solve the above problems, the present invention provides an in-line multi-cylinder engine comprising an engine body including a cylinder block and a cylinder head coupled to the cylinder block, and an oil pan coupled to a lower portion of the engine body. A water jacket formed from the cylinder block to the cylinder head; and a coolant inlet portion that opens at one end of the engine body in the cylinder row direction and introduces coolant into the water jacket. A coolant outlet that opens to one end of the engine body in the cylinder row direction and draws out coolant from the water jacket, and is provided at one end of the engine body in the cylinder row direction. A water pump for supplying a coolant to the water jacket, and the air A radiator coolant introduction section for introducing a coolant for the gin main body, a radiator having a radiator coolant introduction section for extracting the coolant, and a first coolant passage connecting the water pump and the radiator coolant discharge section. And a second coolant passage located on one end side in the cylinder row direction of the engine body over the entire length of the coolant outlet portion and the radiator coolant introduction portion, and the first coolant passage. And a flow rate control valve for controlling the flow rate of the coolant flowing through the first coolant passage, a coolant branch passage branched from the second coolant passage and connected to the flow rate control valve, Oil that is disposed in a branch passage and is attached to a side portion of the oil pan other than one end side in the cylinder row direction in the engine body, and exchanges heat with engine oil. A chromatography La, the flow control valve was placed on the oil pan side of the cylinder row direction one end side of the engine body, to provide a cooling system of the engine.

  According to the present invention, by disposing the flow control valve on the side of the oil pan on one end side in the cylinder row direction in the engine body, while suppressing layout interference with other auxiliary machines, Since the flow rate control valve can be disposed at one end side in the same cylinder row direction, the layout of each coolant passage can be facilitated and the length of each coolant passage can be prevented from becoming longer. Thereby, while being able to suppress the increase in the part weight of a 1st coolant path and a 2nd coolant path, it flows through the coolant circulation path which has a 1st coolant path, a 2nd coolant path, and a water jacket. It is possible to suppress the increase in the capacity of the coolant and to ensure the warm-up performance of the engine.

  In the present invention, it is preferable that an oil pump and a power transmission mechanism for transmitting the rotational force of the crankshaft to the oil pump are provided at the other end of the engine body in the cylinder row direction.

  In the conventional in-line multi-cylinder engine, an oil pump is provided at one end of the oil pan in the cylinder row direction, and a power transmission mechanism that transmits the rotational force of the crankshaft to the oil pump and the camshaft is provided in the cylinder row in the cylinder block and the cylinder head. Since it is provided at one end in the direction, it is disadvantageous to provide the flow control valve at the side of the oil pan at one end in the cylinder row direction of the engine body. However, as in this configuration, an oil pump and a power transmission mechanism that transmits the rotational force of the crankshaft to the oil pump are provided at the other end in the cylinder row direction in the engine body, so that the flow control valve is connected to the oil pump. A conventional arrangement space, that is, one end of the oil pan in the cylinder row direction can be arranged. Thereby, a flow control valve can be arranged compactly, suppressing layout interference with other auxiliary machines.

  In the present invention, at the other end of the engine body in the cylinder row direction, there is a power transmission mechanism for transmitting the rotational force of the crankshaft to the intake valve drive shaft for opening and closing the intake and exhaust valves and the exhaust valve drive shaft. It is preferable to be provided. This is further advantageous in arranging the flow control valve in a compact manner while suppressing layout interference with other auxiliary machines.

  In the present invention, the in-line multi-cylinder engine is a horizontal engine arranged such that the cylinder row direction faces the vehicle width direction, and the engine body is attached to one end of the cylinder block in the cylinder row direction. It is preferable that an engine mount bracket for fixing to the side frame is attached.

  According to this configuration, as described above, the external coolant passage is intensively arranged on the same side of the engine body in the cylinder row direction, and the engine body is used by the engine mount without considering the layout interference with the flow control valve. Can be fixed to the side frame.

In the present invention, an oil cooler for exchanging heat with engine oil is attached to a side portion of the oil pan other than one end side in the cylinder row direction in the engine body, and the oil cooler branches from the second coolant passage. and Ru is disposed in the branch passage of the cooling liquid is connected to a flow control valve.

  According to this configuration, since the oil cooler is attached near the flow rate control valve disposed on the side of the oil pan, it is possible to suppress an increase in the capacity of the coolant because the branch passage of the coolant can be shortened. .

As described above, according to the present invention, the flow control valve is disposed on the side of the oil pan on one end side in the cylinder row direction in the engine body, thereby preventing layout interference with other auxiliary machines. Since the water pump and the flow control valve can be arranged at one end side in the same cylinder row direction while suppressing, the layout of each coolant passage is facilitated and the length of each coolant passage is prevented from being increased. Thus, the warm-up performance of the engine body can be ensured. And since the oil cooler is attached near the flow control valve arrange | positioned at the side part of the oil pan, it can suppress that the branch passage of a cooling fluid can be shortened and the capacity | capacitance of a cooling fluid increases.

It is a figure which shows schematic structure of the cooling device of the engine which concerns on embodiment of this invention. It is the side view which looked at the engine in the embodiment of the present invention from the one side (water pump side) of the cylinder line direction. It is the bottom view which looked at the engine in the embodiment of the present invention from the lower side. It is the perspective view which looked at the engine in the embodiment of the present invention from diagonally upward in the state where the cylinder head was removed. It is a perspective view which shows the engine in embodiment of this invention in the state which removed the cylinder head and the water pump. It is a top view which shows the water jacket of the cylinder head in embodiment of this invention. It is a side view showing a power transmission mechanism which transmits engine power to an oil pump, an intake valve drive shaft, and an exhaust valve drive shaft in an embodiment of the present invention.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

(Overall schematic configuration)
In the following description, the transmission 7 side in the cylinder row direction of the engine body 2 (see FIG. 1) may be referred to as “engine rear side” and the opposite side may be referred to as “engine front side”.

  The engine to which the cooling device according to the embodiment of the present invention is applied is an in-line multi-cylinder engine 1 (see FIG. 1) that is disposed horizontally so that the cylinder row direction faces the vehicle width direction. In the example shown in FIG. 1, the in-line four-cylinder engine is an object to be cooled. However, the present invention is not limited to this, and the number of cylinders can be changed to six cylinders, eight cylinders, or the like.

  FIG. 1 is a schematic diagram schematically showing the overall configuration of the engine 1, in which the cylinder block 3, the oil pan 9, and the transmission 7 are shown as viewed from the width direction orthogonal to the cylinder row direction. In addition, the cylinder head 4 and the radiator 6 are shown as viewed from above.

  As shown in FIG. 1, the engine 1 in this embodiment includes an engine body 2 having a cylinder block 3 and a cylinder head 4 coupled to the upper portion of the cylinder block 3, and oil coupled to the lower portion of the cylinder block 3. The pan 9 is coupled to a mechanical water pump 5 provided at one end of the cylinder block 3 in the cylinder row direction (engine front side end) and the other end of the cylinder block 3 in the cylinder row direction (end of the engine rear side). A transmission 7, a flow control valve 8 provided at a side of one end (in the front end of the engine) in the cylinder row direction of the oil pan 9, a radiator 6 provided at the front side of the engine body 2 in the vehicle front-rear direction, An oil pump 91 (see FIG. 7) provided at the other end of the cylinder block 3 in the cylinder row direction, A power transmission mechanism 92 that transmits the rotational force of the link shaft 80a, a first coolant pipe 10 (corresponding to the “first coolant passage” of the present invention) that connects the mechanical water pump 5 and the radiator 6, and a radiator. 6 and the head side water jacket 60 (corresponding to the “second coolant passage” of the present invention), and the second coolant pipe 11 branches off and is connected to the flow control valve 8. A branch pipe 12 (corresponding to the “branch passage” of the present invention), an oil cooler 13 provided on the side of the oil pan 9 formed along the cylinder row direction, and an ATF warmer (not shown) provided in the transmission 7 And.

  The engine cooling device according to the present embodiment includes a water jacket formed in the engine body 2 among the components of the engine 1, specifically, a block side jacket 30 and a cylinder head 4 formed in the cylinder block 3. The formed head-side water jacket 60, the mechanical water pump 5, the radiator 6, the first cooling liquid pipe 10, the flow control valve 8, the second cooling pipe 11, and the branch pipe. 12.

  Hereinafter, each component of the engine 1 including the cooling device according to the present embodiment will be described in detail.

(Cylinder block)
As shown in FIG. 4, the cylinder block 3 in this embodiment includes four cylinders # 1 to # 4, a so-called open deck type block-side water jacket 30 surrounding these four cylinders, and one end in the cylinder row direction. A coolant inlet 31 (see FIG. 5) for introducing coolant into the block-side water jacket 30, and a side frame (not shown) on the engine body 2 at one end in the vehicle width direction (right side in the present embodiment). And a plurality of boss portions 32 for attaching the engine mount bracket 33 (see FIG. 2) to the side surface of the cylinder block 3.

  In this embodiment, the boss portion 32 has a bolt hole (not shown) for bolting the engine mount bracket 33 to the boss portion 32, and one end portion in the cylinder row direction of the cylinder block 3 (an engine front side end portion). ) Is provided in three. The engine mount bracket 33 is supported at three points by the three boss portions 32.

  The block-side water jacket 30 communicates with the head-side jacket 60 formed on the cylinder head 4 at the other end in the cylinder row direction and the like.

  In the example shown in FIG. 5, the coolant inlet portion 31 has two openings 31 a and 31 b provided so as to be separated from each other in the width direction (vehicle longitudinal direction) orthogonal to the cylinder row direction. . These openings 31 a and 31 b are covered with a pump cover 22 of the water pump 5 shown in FIG. 4, and communicate with a discharge port of the water pump 5 inside the pump cover 22.

(cylinder head)
In the present embodiment, as shown in FIG. 1, the cylinder head 4 includes a head-side water jacket 60 communicating with the block-side water jacket 30, and a cooling provided at one end of the head-side water jacket 60 in the cylinder row direction. A liquid outlet 41 is provided. In the present embodiment, as shown in FIG. 6, the head-side water jacket 60 cools the combustion chamber cooling water jackets 60 a, 60 b, 60 c that cool the upper part of the combustion chamber (near the valve seat) and the vicinity of the exhaust port. And an exhaust port cooling water jacket (not shown). The exhaust port cooling water jacket communicates with the combustion chamber cooling water jacket 60a, 60b, 60c.

(Oil pan)
The oil pan 9 is a container that stores engine oil. The side surface of the oil pan 9 on one end side in the cylinder row direction has a portion below the upper end portion recessed toward the other end side in the cylinder row direction from the upper end portion, and the recessed portion (side portion) 9a ( Refer to Fig. 2 (hereinafter referred to as "recessed portion 9a"). The recess 9 a is located on the other end side in the cylinder row direction from the side surface on the one end side in the cylinder row direction of the cylinder block 3. Further, as shown in FIGS. 2 and 3, an oil cooler 13 and an oil filter 14 are attached to side portions formed along the cylinder row direction of the oil pan 9, and oil supplied from an oil pump 91 is provided. Is circulated to the oil filter 14 and the oil cooler 13 through an oil passage (not shown) formed in the wall portion of the oil pan 9.

(Mechanical water pump)
The mechanical water pump 5 is configured to be driven by the rotational force of the crankshaft. The mechanical water pump 5 is attached to one end of the cylinder block 3 in the cylinder row direction.

(transmission)
The transmission 7 converts the rotation speed and torque of the crankshaft and transmits the converted rotation speed and torque to a drive shaft and the like. A transmission mount bracket (not shown) for fixing the transmission 7 to a side frame (not shown) on the other end side in the vehicle width direction (left side in the present embodiment) is attached to the transmission 7 at the other end in the cylinder row direction of the transmission 7. A plurality of boss portions (not shown) for mounting are provided.

(Radiator)
In the present embodiment, as shown in FIG. 2, the radiator 6 includes a rectangular radiator core 65 having a long side along the vehicle width direction (the cylinder row direction in the present embodiment), and the upper end of the radiator core 65. A downflow type comprising an upper tank 63 connected to the radiator core 65 so as to extend along the (upper side), and a lower tank 64 connected to the radiator core 65 so as to extend along the lower end (lower side) of the radiator core 65. It is a radiator.

  The radiator core 65 extends vertically and is arranged in the vehicle width direction (cylinder row direction in the present embodiment), and a plurality of tubes (not shown) that connect the upper tank 63 and the lower tank 64, and the tubes along the tubes. And a heat dissipating wave fin (not shown).

  In the present embodiment, as shown in FIG. 2, the upper tank 63 has a radiator side coolant introduction part 61 that introduces coolant at one end in the cylinder row direction. The lower tank 64 has a coolant leading portion 62 for leading coolant at the other end in the cylinder row direction.

  The radiator 6 introduces the coolant from the coolant introduction part 61 into the upper tank 63, and flows the introduced coolant from the one end side to the other end side in the cylinder row direction through the upper tank 63, and the lower tank 64 through each tube of the radiator core 65. The coolant is lowered to the other end side in the cylinder row direction through the lower tank 64 and led out from the coolant lead-out unit 62.

(Oil pump)
The oil pump 91 (see FIG. 7) pumps up engine oil in the oil pan 9, passes through the oil filter 14 and the oil cooler 13, and supplies it to a required location in the engine body 2. The oil supplied to the required location returns to the oil pan 9 through the oil passage and crankcase in the engine body 2. The oil pump 91 in the present embodiment is provided at the other end of the cylinder block 3 in the cylinder row direction (engine rear side end), specifically, at a position opposite to the flow rate control valve 8. The oil pump 91 is driven by the rotational force of the crankshaft 80a.

(Power transmission mechanism)
The power transmission mechanism 92 transmits the rotational force of the crankshaft 80a to the oil pump drive shaft 90a, the intake valve drive shaft (intake side cam shaft) 32a, and the exhaust valve drive shaft (exhaust side cam shaft) 41a. . In this embodiment, the power transmission mechanism 92 includes a crank sprocket 80 formed on the crankshaft 80a, a pump sprocket 90 fixed to the oil pump drive shaft 90a, and an intake valve fixed to the intake valve drive shaft 32a. Sprocket 32, exhaust valve sprocket 41 fixed to exhaust valve drive shaft 41a, first sprocket 80 for crank and first timing chain 43 wound around sprocket 90 for pump, crank sprocket 80, intake valve sprocket 32, a second timing chain 50 wound around the exhaust valve sprocket 41, a first pressing member (chain tensioner) 19 for pressing the first timing chain 43, and a second pressing member (chain) for pressing the second timing chain 50 Tensioner) 60 Eteiru.

(First coolant pipe)
In the example shown in FIGS. 1 to 3, the first coolant pipe 10 is a part 10 a upstream of the flow rate control valve 8 (hereinafter referred to as “upstream part 10 a”). And a portion 10b on the downstream side of the flow control valve 8 (hereinafter referred to as "downstream portion 10b"). In the example shown in FIGS. 2 and 3, the downstream portion 10 b of the first coolant pipe 10 is curved from the suction port of the mechanical water pump 5 while curving on one end side in the cylinder row direction of the engine body 2. Extending diagonally downward. Further, the upstream portion 10a of the first coolant pipe 10 extends along the radiator 6 in the cylinder row direction in the engine body 2 and is slightly curved at one end side from the flow control valve 8 to the radiator-side coolant outlet 62. It extends in a substantially horizontal direction.

(Second coolant pipe)
As shown in FIGS. 2 and 3, the second coolant pipe 11 is located on one end side in the cylinder row direction of the engine body 2 over the entire length. In the example shown in FIGS. 2 and 3, the second coolant pipe 11 is substantially horizontal from the coolant outlet portion 41 to the radiator side coolant introduction portion 61 while slightly curving at one end side in the cylinder row direction in the engine body 2. Extending in the direction.

(Branch pipe)
The branch pipe 12 has a function of bypassing the radiator 6 and a function of supplying a coolant to the auxiliary machine. An auxiliary machine such as an oil cooler 13 or an ATF warmer is interposed in the middle of the branch pipe 12 in the present embodiment. In the example shown in FIG. 1, the number of branch pipes 12 is one, but a plurality of branch pipes 12 may be provided.

(Flow control valve)
The flow control valve 8 has a plurality of ports to which the first coolant pipe 10 and the branch pipe 12 are individually connected and whose opening degree can be adjusted. For example, when the engine is started, the supply of the coolant to the radiator 6 is stopped by closing the port connected to the first coolant pipe 10a extending from the radiator 6 and opening the port connected to the branch pipe 12. The coolant passes through the block-side water jacket 30, the head-side water jacket 60, and the like. Thereby, the temperature rise of the coolant is promoted, and warming up at the time of starting the engine is promoted. In addition, after the warm-up of the engine 1 is finished, the port connected to the first coolant pipe 10a extending from the radiator 6 is opened and the port connected to the branch pipe 12 is opened, so that the coolant is supplied to the radiator 6. While passing, the coolant passes through the block-side water jacket 30, the head-side water jacket 60, and the like. Thereby, the engine main body 2 etc. can be cooled appropriately.

(Operational effect of this embodiment)
Next, the effect of this embodiment is demonstrated.

  According to the present embodiment, as shown in FIGS. 2 and 3, by arranging the flow control valve 8 on the side of the oil pan 9 on one end side in the cylinder row direction in the engine body, other auxiliary machines are provided. The water pump 5 and the flow rate control valve 8 can be arranged at one end side in the same cylinder row direction while suppressing the layout interference with each other, so that the layout of the coolant pipes 10 and 11 is facilitated and the first cooling is performed. Since the liquid pipe 10 and the second cooling liquid pipe 11 are mainly disposed on one end side in the cylinder row direction in the engine body 2, the first cooling liquid pipe 10 and the second cooling liquid pipe 11 are substantially omitted in the vehicle width direction. They can be concentrated at the same position or at positions close to each other. As a result, it is possible to prevent an increase in the weight of components such as the first cooling liquid pipe 10, the second cooling liquid pipe 11, and the branch pipe 12, and the first cooling liquid pipe 10, the second cooling liquid pipe 11, and the branch pipe. Therefore, it is possible to prevent an increase in the capacity of the coolant flowing through the coolant circulation path having the water jacket 30 and the water jacket 30, thereby ensuring the warm-up performance of the engine.

  Further, since the flow control valve 8 is disposed on the side of the oil pan 9 on the one end side in the cylinder row direction, the flow control valve 8 can be disposed in a compact manner while suppressing layout interference with other auxiliary machines. it can.

  Further, according to the present embodiment, the power transmission mechanism 92 that drives the oil pump 91, the intake valve drive shaft 32a, and the exhaust valve drive shaft 41a with the rotational force of the crankshaft 80a is arranged in the cylinder row direction in the engine body 2. By providing the other end portion, the conventional arrangement space of the oil pump and the arrangement space of the power transmission mechanism of the intake valve drive shaft 32a and the exhaust valve drive shaft 41a become unnecessary. It becomes possible to arrange | position to the hollow part 9a provided in the side part of one end side. Thereby, the flow control valve 8 can be arranged more compactly.

  Further, according to the present embodiment, the engine body 2 can be fixed to the side frame by the engine mounting bracket 33.

  Further, the engine 1 in the present embodiment is an engine applied to an FF type (front engine / front drive type) drive device, but is not limited thereto, and is driven by an FR type (front engine / rear drive type). It may be applied to the device. When the engine 1 is applied to the FR system, the engine 1 is arranged so that the cylinder row direction faces the vehicle front-rear direction, and the coolant inlet portion and the coolant outlet portion of the engine body are located on the radiator side in the cylinder row direction. Arranged vertically.

  Further, according to the present embodiment, the branch pipe 12 that circulates the coolant to the oil cooler 13 or the like is branched from the second coolant pipe 11, but instead of this, the coolant downstream of the water pump 5. You may make it branch from the entrance part 31 or the block side water jacket 30. FIG.

DESCRIPTION OF SYMBOLS 1 Multi-cylinder engine 2 Engine main body 3 Cylinder block 4 Cylinder head 5 Mechanical water pump 6 Radiator 8 Flow control valve 9 Oil pan 10 1st coolant pipe (1st coolant path)
11 Second coolant pipe (second coolant passage)
30 Block side water jacket 31 Coolant inlet part 33 Engine mount bracket 40 Head side water jacket 41 Coolant outlet part 61 Radiator coolant introduction part 62 Radiator coolant outlet part

Claims (4)

An apparatus for cooling an in-line multi-cylinder engine comprising an engine body including a cylinder block and a cylinder head coupled to the cylinder block, and an oil pan coupled to a lower portion of the engine body,
A water jacket formed from the cylinder block to the cylinder head;
A coolant inlet opening that opens at one end of the engine body in the cylinder row direction and introduces coolant into the water jacket;
A coolant outlet that opens to one end of the engine body in the direction of the cylinder row and draws the coolant from the water jacket;
A water pump that is provided at one end of the engine body in the cylinder row direction and supplies coolant to the water jacket via the coolant inlet;
A radiator having a radiator coolant introduction section for introducing the coolant of the engine body and a radiator coolant introduction section for deriving the coolant;
A first coolant passage connecting the water pump and the radiator coolant outlet,
A second coolant passage that connects the coolant outlet portion and the radiator coolant introduction portion and is located on one end side in the cylinder row direction of the engine body over the entire length;
A flow rate control valve that is interposed in the first coolant passage and controls the flow rate of the coolant flowing through the first coolant passage ;
A coolant branch passage branched from the second coolant passage and connected to the flow control valve;
An oil cooler that is disposed in the branch passage and is attached to a side portion of the oil pan other than one end side in the cylinder row direction in the engine body, and exchanges heat with engine oil ;
The flow rate control valve is an engine cooling device disposed at a side portion of an oil pan on one end side in the cylinder row direction in the engine body.   The oil pump and a power transmission mechanism that transmits a rotational force of a crankshaft to the oil pump are provided at the other end of the engine body in the cylinder row direction. Engine cooling system.   The other end of the engine body in the cylinder row direction is further provided with a power transmission mechanism for transmitting the rotational force of the crankshaft to the intake camshaft and the exhaust camshaft for opening and closing the intake and exhaust valves. The engine cooling device according to claim 2.   The in-line multi-cylinder engine is a horizontally mounted engine arranged such that a cylinder row direction faces a vehicle width direction, and the engine body is fixed to a side frame of a vehicle at one end portion in the cylinder row direction of the cylinder block. An engine cooling device according to any one of claims 1 to 3, wherein an engine mounting bracket is attached.

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