JP6303911B2 - Radiator / oil cooler arrangement structure for motorcycles - Google Patents

Description

  The present invention relates to a radiator / oil cooler arrangement structure for a motorcycle.

  Patent Document 1 discloses a configuration in which a radiator is divided into two parts vertically by avoiding a front cylinder head of a V-type engine, each radiator is connected by piping, and an oil cooler is arranged on the side of the front cylinder head. Yes.

  Japanese Patent Application Laid-Open No. H10-228561 discloses a structure in which a notch is formed in the central portion of the radiator, and engine parts are disposed through the notch.

  Further, Patent Document 3 discloses that a radiator is disposed in front of the engine and in an upper and lower direction of the vehicle and an oil cooler is disposed in the lower side, and these radiators and oil cooler are formed in a substantially trapezoidal shape. Has been.

JP 2013-174202 A Japanese Utility Model Publication No. 5-8262 JP 2010-64706 A

  However, in Patent Document 1, since the front cylinder head is arranged at the center of the front opening of the cowling in the motorcycle, the supply of traveling wind to the radiator and the oil cooler is hindered. For this reason, both the cooling efficiency of the cooling water by the radiator and the cooling efficiency of the lubricating oil by the oil cooler are reduced.

  Further, in Patent Document 1, the radiator is completely divided and each is independently attached to the vehicle body frame and the engine parts. Therefore, the number of parts of the attachment parts increases, and the number of attachment processes also increases.

  Furthermore, since the notch part is formed in the center part of a radiator in patent document 2, the flow of the cooling water in a radiator will generate | occur | produce, and the cooling performance of a radiator will fall.

  An object of the present invention has been made in consideration of the above-described circumstances, and is a radiator / oil cooler arrangement for a motorcycle that can improve both the cooling efficiency of cooling water by the radiator and the cooling efficiency of lubricating oil by the oil cooler. To provide a structure.

A radiator / oil cooler arrangement structure for a motorcycle according to the present invention is a radiator / oil cooler arrangement structure for a motorcycle in which an engine is suspended on a vehicle body frame, and a radiator and an oil cooler are arranged in front of the engine. It is divided into an upper radiator and a lower radiator, the oil cooler is disposed between the upper radiator and the lower radiator in the vehicle vertical direction, and the length of the lower surface of the lower radiator is equal to that of the upper surface of the upper radiator. The upper surface of the oil cooler is set to be the same length as the lower surface of the upper radiator in the vehicle front view, and the lower surface of the oil cooler is set to the upper surface of the lower radiator and the vehicle front view. In the same length, the upper radiator, the lower radiator, the front Each of the oil coolers is provided with tank portions on both sides in the vehicle width direction, and in the upper radiator, the supply-side radiator pipe is connected to a rear surface of the tank portion on the side connected to the engine by a supply-side radiator pipe, In the lower radiator, the discharge side radiator pipe is connected to the rear surface of the tank portion on the side connected to the engine by a discharge side radiator pipe. In the oil cooler, the discharge side radiator pipe is connected to the engine by a supply side oil cooler pipe. The supply-side oil cooler piping is connected to the rear surface of the tank portion on the side of the tank, and the discharge-side oil cooler piping is connected to the rear surface of the tank portion on the side connected to the engine by the discharge-side oil cooler piping, A supply-side radiator pipe and a discharge-side radiator pipe; a supply-side oil cooler pipe; and The discharge-side oil cooler pipe is disposed on a different side in the vehicle width direction across the engine, and the supply-side radiator pipe, the discharge-side radiator pipe, the supply-side oil cooler pipe, and the discharge-side oil cooler pipe Is characterized in that it is disposed through the inside of the vehicle relative to the tank portion to which each is connected .

  According to the present invention, since the oil cooler is disposed in front of the engine and between the upper radiator and the lower radiator in the vehicle vertical direction, the upper radiator and the oil cooler are disposed at a position where a lot of traveling wind passes. it can. As a result, it is possible to improve both the cooling efficiency of the cooling water by the radiator and the cooling efficiency of the lubricating oil by the oil cooler.

1 is a left side view showing a front half of a motorcycle to which an embodiment of a radiator / oil cooler arrangement structure for a motorcycle according to the present invention is applied. FIG. 2 is a left side view showing the periphery of the engine excluding cowling in the motorcycle of FIG. 1. The front view which shows the motorcycle of FIG. FIG. 2 is a right side view showing the periphery of the engine excluding cowling in the motorcycle of FIG. 1. The V arrow line view of FIG. FIG. 6 is a front view showing the communication part cut away except for the body frame and the like in FIG. 5. The perspective view which shows the radiator and oil cooler of FIG. The VIII arrow line view of FIG. 7 observed from the upper direction of the position where the upper side radiator and oil cooler of FIGS. 5-7 inclined forward. The IX arrow line view of FIG. 7 which looked at the radiator and oil cooler of FIGS. Sectional drawing which follows the XX line of FIG.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
FIG. 1 is a left side view showing a front half portion of a motorcycle to which an embodiment of a radiator / oil cooler arrangement structure for a motorcycle according to the present invention is applied. FIG. 2 is a left side view showing the periphery of the engine excluding the cowling in the motorcycle shown in FIG. In the present embodiment, the expressions “up / down”, “left / right”, and “front / rear” are based on the driver when riding the vehicle.

  As shown in FIGS. 1 to 4, the motorcycle 1 includes a body frame 2, and a head pipe 3 is provided in front of the body frame 2. The head pipe 3 is pivotally supported by a steering mechanism 7 including a pair of left and right front forks 5, a handle bar (not shown), etc., which includes a suspension mechanism (not shown) and rotatably supports the front wheel 4. The front wheel 4 is steered by the bar so as to be rotatable left and right. The front wheel 4 is covered at the top by a front fender 6 supported by a front fork 5.

  On the other hand, the vehicle body frame 2 is, for example, a twin-tube type, and has a main frame 8 that also functions as a pair of left and right tank rails that extend in the left-right direction immediately after the head pipe 3 and extend rearward and obliquely downward. Configured. A fuel tank (not shown) is disposed above the main frame 8, and a rider seat and a pillion seat (not shown) are respectively disposed in the vehicle front-rear direction behind the fuel tank.

  A pivot shaft 9 is installed at the lower rear portion of the main frame 8, and a swing arm (not shown) is pivotally attached to the pivot shaft 9 so as to be swingable about the pivot shaft 9 and at the rear end of the swing arm. A rear wheel (not shown) is pivotally supported. An engine 10 as an internal combustion engine is suspended from the main frame 8 below the fuel tank at the lower center of the vehicle between the front wheels 4 and the rear wheels. The driving force of the engine 10 is transmitted to the rear wheels via a drive chain (not shown).

  As shown in FIGS. 2 and 4, the engine 10 includes a cylinder assembly 14 including a cylinder block 11, a cylinder head 12, and a head cover 13 coupled to an engine case 15. The cylinder head 12 is formed with a combustion chamber (both not shown) communicating with the cylinder bore of the cylinder block 11 and an intake port 16 and an exhaust port 17 communicating with the combustion chamber. An oil pan 18 is installed at the lower part of the engine case 15.

  An engine intake system having a throttle body having a throttle valve, an air cleaner, and a fuel injector installed in the throttle body, both not shown, is connected to the intake port 16 of the cylinder head 12 so that air and fuel are supplied to the engine 10. The An exhaust pipe 19 is connected to the exhaust port 17 of the cylinder head 12, and the exhaust pipe 19 extends rearward from the lower side and is connected to an exhaust muffler 20. Exhaust gas from the engine 10 is exhausted through an exhaust pipe 18 and an exhaust muffler 20.

  As shown in FIG. 1, the motorcycle 1 is covered with a streamlined front cowling 21 in the front part of the vehicle, that is, the region extending from the steering mechanism 7 to both sides of the engine 10. The front cowling 21 reduces air resistance during vehicle travel and protects the rider from travel wind pressure.

Further, a radiator 25 and an oil cooler 26 are disposed in the space inside the cowling 24 in front of the engine 10.

  The radiator 25 flows cooling water that cools the engine 10 by flowing in a water jacket formed around the cylinder bore of the cylinder block 11 and the combustion chamber of the cylinder head 12 in the engine 10. To cool (air-cool). As shown in FIGS. 5 to 7, the radiator 25 is divided into an upper radiator 25 </ b> A disposed at an upper position and a lower radiator 25 </ b> B disposed at a lower position, separated from each other in the vehicle vertical direction. An oil cooler 26 is disposed between the upper radiator 25A and the lower radiator 25B in the vehicle vertical direction.

  The upper radiator 25A is provided with an inlet tank portion 27 on the left side of the vehicle and an outlet tank portion 28 on the right side of the vehicle. The inlet tank portion 27 and the outlet tank portion 28 are each provided with a plurality of fins having fins around them. Do not communicate with the tube. The lower radiator 25B is provided with an inlet tank portion 27 on the right side of the vehicle and an outlet tank portion 28 on the left side of the vehicle. The inlet tank portion 27 and the outlet tank portion 28 are provided with a plurality of fins around the periphery. It communicates with a tube (not shown) of the book. As described above, the outlet tank portion 28 of the upper radiator 25 </ b> A and the inlet tank portion 27 of the lower radiator 25 </ b> B are positioned on the same side in the vehicle width direction (the vehicle right side in the present embodiment) and communicated by the communication portion 29.

  With respect to the upper radiator 25A and the lower radiator 25B, the upper radiator 25A is formed in a rectangular shape and the lower radiator 25B is formed in a trapezoidal shape when viewed from the front of the vehicle (FIGS. 5 and 6). That is, in the upper radiator 25A, the upper surface 30 and the lower surface 31 are formed in a rectangular shape having substantially the same length. The lower radiator 25 </ b> B is formed in a trapezoidal shape in which the lower surface 33 is shorter than the upper surface 32. Furthermore, in the vehicle front view, the length of the lower surface 33 of the lower radiator 25B is set shorter than the length of the upper surface 30 of the upper radiator 25A.

  2, 7 and 9, the lower radiator 25B is a flat plate and is arranged in the vertical direction, while the upper radiator 25A is arranged to be inclined forward of the vehicle and at the center in the vehicle width direction. The portion is formed in a curved shape that protrudes rearward of the vehicle.

  As shown in FIGS. 2, 5 and 7, the communication portion 29 communicates the outlet tank portion 28 of the upper radiator 25A and the inlet tank portion 27 of the lower radiator 25B, but has a bent portion. Therefore, for example, an aluminum sheet metal is bent into a pipe shape, and the flow path cross-sectional area does not change and is formed uniformly. As shown in FIGS. 1 and 10, the communication portion 29 is disposed in front of the oil cooler 26 and in a front peripheral portion 36 that forms a front opening 35 of the front cowling 21.

  As shown in FIG. 2, in the above-described radiator 25, the water jacket in the cylinder head 12 of the engine 10 is connected to the inlet tank portion 27 of the upper radiator 25A by the supply side radiator pipe 37, and the outlet tank portion of the lower radiator 25B. 28 is connected to a water pump 39 installed in the engine case 15 of the engine 10 by a discharge side radiator pipe 38. The supply-side radiator pipe 37 and the discharge-side radiator pipe 38 are collectively arranged on the left side of the engine 10 in the vehicle width direction.

  In the cylinder block 11 and the cylinder head 12 of the engine 10, cooling water for cooling the periphery of the cylinder bore and the combustion chamber flows into the inlet tank portion 27 of the upper radiator 25A through the supply side radiator pipe 37, and in the tube of the upper radiator 25A. Is cooled by flowing in the direction of arrow A in FIGS. 5 and 7, and then flows into the outlet tank portion 28 of the upper radiator 25A. The cooling water in the outlet tank portion 28 of the upper radiator 25A flows through the communication portion 29 and flows into the inlet tank portion 27 of the lower radiator 25B as indicated by an arrow B. This cooling water flows in the tube of the lower radiator 25B as shown by the arrow C, is cooled, flows into the outlet tank portion 28 of the lower radiator 25B, and then passes through the discharge radiator pipe 38 and the water pump of the engine 10. It flows into 39. The water pump 39 pumps the cooling water cooled by the radiator 25 into a surrounding water jacket such as a cylinder bore or a combustion chamber in the engine 10 to cool the engine 10.

  As described above, the oil cooler 26 disposed between the upper radiator 25A and the lower radiator 25B in the vehicle vertical direction is a crankshaft peripheral component (for example, a crankpin bearing) in the engine 10, a transmission, a valve operating device, or the like. This is an air-cooled oil cooler that cools the lubricating oil that lubricates the vehicle with the traveling wind when the motorcycle 1 is traveling.

  As shown in FIGS. 6 and 7, the oil cooler 26 has an upper surface 40 and a lower surface 41 formed in a rectangular shape having substantially the same length when viewed from the front of the vehicle. Here, the upper surface 40 of the oil cooler 26 is set to have substantially the same length as the lower surface 31 of the upper radiator 25A. Further, the lower surface 41 of the oil cooler 26 is set to have substantially the same length as the upper surface 32 of the lower radiator 25B. Further, as shown in FIGS. 2 and 7, the oil cooler 26 is disposed to be inclined forward of the vehicle in the same manner as the upper radiator 25 </ b> A.

  Further, in the oil cooler 26, an inlet tank portion 42 is disposed on the upper side on the right side of the vehicle, an outlet tank portion 43 is disposed on the lower side, and a return tank portion 44 is disposed on the left side of the vehicle. The inlet tank portion 42 and the return tank portion 44 are further connected to the outlet tank portion 43 and the return tank portion 44 by a plurality of tubes (not shown) each having a fin around it.

  As shown in FIGS. 4 and 9, the inlet tank portion 42 and the outlet tank portion 43 that are arranged in a concentrated manner on the right side of the vehicle as described above include the supply-side oil cooler pipe 45 in the inlet tank portion 42, and the outlet tank portion. The discharge side oil cooler pipes 46 are connected to 43 respectively. Among these, the supply-side oil cooler pipe 45 is connected to an oil pump (not shown) installed in the engine case 15 of the engine 10. Further, the discharge side oil cooler pipe 46 is connected to an oil filter 47 installed in the engine case 15 of the engine 10. These supply-side oil cooler piping 45 and discharge-side oil cooler piping 46 are concentrated on the different side in the vehicle width direction with respect to the supply-side radiator piping 37 and the discharge-side radiator piping 38, that is, on the right side of the vehicle. Be placed.

  As shown in FIGS. 4 and 6, the lubricating oil stored in the oil pan 18 of the engine 10 is sucked by the oil pump and flows into the inlet tank portion 42 of the oil cooler 26 through the supply-side oil cooler pipe 45. The lubricating oil that has flowed into the inlet tank portion 42 of the oil cooler 26 is cooled while flowing through the tube of the oil cooler 26 and the return tank portion 44 as indicated by arrow F, and flows into the outlet tank portion 43 of the oil cooler 26. The lubricating oil that has flowed into the outlet tank 43 of the oil cooler 26 is removed from the oil filter 47 through the oil cooler pipe 46 on the discharge side, and then the components around the crankshaft of the engine 10, the transmission, the valve gear, etc. Lubricate.

  By the way, as shown in FIG.7 and FIG.9, the 1st mounting bracket 51 and the 2nd mounting bracket 52 are each protrudingly provided in the vehicle width direction both sides in the lower part of 25 A of upper radiators. Further, a third mounting bracket 53 projects from the left side in the vehicle width direction at the upper part of the lower radiator 25B. Further, a fourth mounting bracket 54 and a fifth mounting bracket 55 project from both sides of the oil cooler 26 in the vehicle width direction, and a sixth mounting bracket 56 projects from the left side in the vehicle width direction. For the upper radiator 25A, the lower radiator 25B, and the oil cooler 26, the first mounting bracket 51 and the second mounting bracket 52 of the upper radiator 25A are respectively bolted to the fourth mounting bracket 54 and the fifth mounting bracket 55 of the oil cooler 26, for example. Further, the third mounting bracket 53 of the lower radiator 25B is, for example, bolted to the sixth mounting bracket 56 of the oil cooler 26, so that they are integrally coupled.

  Further, as shown in FIGS. 5 and 6, the upper radiator 25 </ b> A has an attachment portion 57 installed on the upper surface 30 so as to be separated from each other, and an elastic member such as rubber is used for the main frame 8 via the first attachment stay 58. By being elastically supported, the main frame 8 is attached. Further, as shown in FIGS. 2 and 7, the oil cooler 26 has one end of the second mounting stay 59 fixed to the lower left portion thereof, for example, by bolts, and the other end of the second mounting stay 59 is made of an elastic member. It is attached to the engine case 15 by being elastically supported by the engine case 15. Further, as shown in FIG. 4, the lower radiator 25B has one end of a third mounting stay 60 fixed to the lower right side, for example, by bolts, and the other end of the third mounting stay 60 uses an elastic member to The oil pan 18 is attached by being elastically supported by the pan 18.

  The radiator 25 and the oil cooler 26 attached to the vehicle body frame 2 and the engine 10 as described above are cooled by traveling wind passing through the front opening 35 of the front cowling 21, as shown in FIG. At this time, the regions where the traveling wind passes a lot are regions X and Y that are not obstructed by the front fork 5 and the front fender 6, as shown in FIG.

With the configuration as described above, the following effects (1) to (8) are achieved according to the present embodiment.
(1) As shown in FIGS. 2 and 5, since the oil cooler 26 is disposed in front of the engine 10 and between the upper radiator 25A and the lower radiator 25B in the vertical direction of the vehicle, there is much traveling wind. The upper radiator 25 </ b> A and the oil cooler 26 can be arranged at the passing positions (region X and region Y). As a result, both the cooling efficiency of the cooling water by the radiator 25 and the cooling efficiency of the lubricating oil by the oil cooler 26 can be improved.

  (2) Since the oil cooler 26 is disposed between the upper radiator 25A and the lower radiator 25B in the vehicle vertical direction, the shape of the oil cooler 26 is changed from the trapezoidal shape of the prior art (Patent Document 3) to the rectangular shape. . As a result, the lengths of the plurality of tubes in the oil cooler 26 are substantially the same and are not biased toward the flow rate of the lubricating oil flowing through each tube, so that the lubricating oil can be efficiently cooled.

  (3) Since the oil cooler 26 is disposed between the upper radiator 25 </ b> A and the lower radiator 25 </ b> B in the vehicle vertical direction, the lower radiator 25 </ b> B is positioned at a low position that is substantially the same height as the lower portion of the engine 10. Therefore, the discharge-side radiator pipe 38 that connects the outlet tank portion 28 of the lower radiator 25B and the water pump 39 of the engine 10 can be disposed in the horizontal direction, and the length of the discharge-side radiator pipe 38 can be shortened.

  (4) Since the communication portion 29 that connects the outlet tank portion 28 of the upper radiator 25A and the inlet tank portion 27 of the lower radiator 25B is configured uniformly without changing the flow path cross-sectional area, the communication portion 29 The pressure loss of the cooling water flowing inside can be suppressed.

  (5) Since the upper radiator 25A and the oil cooler 26 are arranged to be inclined forward of the vehicle and the lower radiator 25B is arranged vertically, as shown in FIG. 1, these upper radiator 25A, lower radiator 25B and An appropriate clearance 61 can be secured between the oil cooler 26 and the front wheel 4. Further, since the appropriate clearance 62 can be maintained between the lower radiator 25B and the oil cooler 26 and the engine 10, the degree of freedom in the layout of the exhaust pipe 19 is increased. As a result, the exhaust efficiency by the exhaust pipe 19 is improved. Can be improved.

  (6) Since the length of the lower surface 33 of the lower radiator 25B is set shorter than the length of the upper surface 30 of the upper radiator 25A as shown in FIG. 5, the vehicle width at the lower part of the motorcycle 1 can be suppressed. Therefore, the bank angle of the motorcycle 1 can be appropriately secured.

  (7) As shown in FIGS. 4 and 5, the communication portion 29 that connects the upper radiator 25 </ b> A and the lower radiator 25 </ b> B is disposed in front of the oil cooler 26. The vehicle width of the motorcycle 1 can be suppressed without protruding in the vehicle width direction. At the same time, the communication portion 29 is disposed in front of the oil cooler 26 and is not disposed behind the motorcycle 1, so that it interferes with the supply-side oil cooler piping 45 and the discharge-side oil cooler piping 46. Nor.

  (8) As shown in FIGS. 2 and 4, the supply side radiator pipe 37 and the discharge side radiator pipe 38 of the radiator 25 are on the left side of the vehicle, and the supply side oil cooler pipe 45 and the discharge side oil cooler pipe 46 of the oil cooler 26 are provided. They are arranged in a concentrated manner on the right side of the vehicle. For this reason, the weight balance in the vehicle width direction in the motorcycle 1 can be improved. Furthermore, the cooling water inflow / outflow part of the radiator 25 can be brought close to the supply side radiator pipe 37 and the discharge side radiator pipe 38, and the lubricating oil inflow / outflow part of the oil cooler 26, the supply side oil cooler pipe 45, and the discharge side oil cooler pipe 46 Therefore, the lengths of the radiator pipes 37 and 38 and the oil cooler pipes 45 and 46 can be shortened.

  As mentioned above, although embodiment of this invention was described, this embodiment is shown as an example and is not intending limiting the range of invention. This embodiment can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention.

DESCRIPTION OF SYMBOLS 1 Motorcycle 2 Body frame 8 Main frame 10 Engine 21 Front cowling 25 Radiator 25A Upper radiator 25B Lower radiator 26 Oil cooler 29 Communication part 30 Upper radiator upper surface 33 Lower radiator lower surface 36 Front peripheral edge 37 Supply side radiator piping 38 Discharge-side radiator piping 45 Supply-side oil cooler piping 46 Discharge-side oil cooler piping

Claims (4)

A radiator / oil cooler arrangement structure for a motorcycle in which an engine is suspended on a body frame, and a radiator and an oil cooler are arranged in front of the engine,
The radiator is divided into an upper radiator and a lower radiator;
The oil cooler is disposed between the upper radiator and the lower radiator in the vehicle vertical direction ,
The length of the lower surface of the lower radiator is set shorter than the length of the upper surface of the upper radiator in the vehicle front view, and the upper surface of the oil cooler is set to the same length as the lower surface of the upper radiator in the vehicle front view, The lower surface of the oil cooler is set to the same length as the upper surface of the lower radiator and the vehicle front view,
Each of the upper radiator, the lower radiator, and the oil cooler is provided with tank portions on both sides in the vehicle width direction,
In the upper radiator, the supply-side radiator pipe is connected to the rear surface of the tank portion on the side connected to the engine by a supply-side radiator pipe, and in the lower radiator, the exhaust-side radiator pipe is connected to the engine. The discharge side radiator pipe is connected to the rear surface of the tank part on the side,
In the oil cooler, the supply-side oil cooler piping is connected to the rear surface of the tank portion connected to the engine by a supply-side oil cooler piping, and the side connected to the engine by a discharge-side oil cooler piping. The discharge side oil cooler pipe is connected to the rear surface of the tank part,
The supply side radiator pipe and the discharge side radiator pipe, and the supply side oil cooler pipe and the discharge side oil cooler pipe are disposed on different sides in the vehicle width direction across the engine,
The supply-side radiator pipe, the discharge-side radiator pipe, the supply-side oil cooler pipe, and the discharge-side oil cooler pipe are arranged through the inside of the vehicle rather than the tank portion to which each is connected. A radiator / oil cooler arrangement structure for motorcycles. 2. The two-wheeled vehicle according to claim 1, wherein the tank portions on the same side in the vehicle width direction of the upper radiator and the lower radiator are communicated with each other through a uniform communication portion without changing a flow passage cross-sectional area. Radiator / oil cooler arrangement structure. The radiator / oil cooler arrangement structure for a motorcycle according to claim 1 or 2, wherein the upper radiator and the oil cooler are arranged to be inclined toward the front of the vehicle, and the lower radiator is arranged vertically. Wherein each of the tank portion in the vehicle width direction same side of the upper radiator and the lower radiator is communicated with the communicating portion, claims 1 to 3 the communicating portion, characterized in that disposed in front of the oil cooler The radiator / oil cooler arrangement structure for a motorcycle according to any one of the above.

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