JP4495053B2 - Motorcycle heat exchanger - Google Patents

Description

  The present invention relates to a motorcycle heat exchanger for adjusting the temperature of an engine.

Conventionally, there has been proposed a motorcycle in which a heat exchanger such as an oil cooler or a radiator is disposed behind the front wheel (see, for example, Patent Document 1).
JP-A-6-144327 (FIG. 1)

  In FIG. 1 of Patent Document 1, a motorcycle 1 includes a radiator 8 (hereinafter referred to as a radiator 8) and an oil cooler 12 as heat exchangers behind a front wheel 5. Then, the radiator 8 and the oil cooler 12 are attached to the down tube 6 provided at the rear of the front wheel 5 so as not to create a ventilation space between the radiator 8 and the oil cooler 12, so that the temperature of the engine is adjusted effectively. did.

By the way, the radiator 8 and the oil cooler 12 are exposed, and there is room for improvement in the appearance in a side view.
When the left and right sides of the radiator 8 and the oil cooler 12 are covered with a decorative cover such as a cowl, the appearance is enhanced, but the cost of attaching the decorative cover increases.
Therefore, a technique for improving the appearance of the heat exchanger without using a decorative cover is required.

  An object of the present invention is to provide a heat exchanger for a motorcycle that can ensure good appearance without providing a decorative cover.

According to a first aspect of the present invention, there is provided a motorcycle in which a heat exchanger comprising a tank part for storing fluid on both the left and right sides and a core part for cooling the fluid provided between the tank parts is disposed behind the front wheel. The tank is extended rearward, and the outer plate of the tank part exposed to the outside of the vehicle forms a surface that smoothly continues with the vehicle body components.

  The invention according to claim 2 is characterized in that the heat exchanger is disposed at the front lower side of the engine, and the tank portion extends below the crankcase of the engine.

  In the invention which concerns on Claim 3, a heat exchanger is an oil cooler which cools the oil of an engine, It is characterized by the above-mentioned.

  In the invention according to claim 1, since the tank portion is extended rearward, the longitudinal length of the tank portion is increased. As a result, the heat radiation area of the tank part can be increased, and the capacity of the heat exchanger can be increased.

  Further, since the outer plate of the tank portion forms a surface that smoothly continues with the vehicle body component, the outer surface of the tank portion and the outer surface of the vehicle body component can be smoothly connected. Since the outer surface of the tank portion and the outer surface of the vehicle body component are smoothly connected, a heat exchanger having a good appearance can be obtained without providing a decorative cover.

In the invention which concerns on Claim 2, since a heat exchanger is arrange | positioned in the front lower direction of an engine, it can receive sufficient quantity of wind from the front, without being interrupted by an engine.
In addition, since the tank portion extends below the crankcase of the engine, the vertical length of the tank portion increases. As a result, the heat radiation area of the tank part can be increased, and the capacity of the heat exchanger can be further enhanced.

  In the invention which concerns on Claim 3, since a heat exchanger is an oil cooler which cools the oil of an engine, it can utilize a tank part on either side as an oil tank. By using the left and right tank portions as oil tanks, the oil pan of the engine can be reduced. In addition, the height of the engine can be suppressed.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. In the figure, “front”, “rear”, “upper”, “lower”, “left”, and “right” indicate directions viewed from the driver. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a right side view of a motorcycle provided with a heat exchanger according to the present invention. The motorcycle 10 includes a body frame 11, a head pipe 12 provided at the front end of the body frame 11, and the head pipe. A pair of left and right main frames 13, 14 (only the reference numeral 14 on the near side is shown) composed of a plurality of pipes extending obliquely downward and rearward from 12, and a pair of left and right pivots respectively attached to the rear portions of the main frames 13, 14 Plates 16 and 17 (only the reference numeral 17 on the front side is shown), a pair of left and right seat rails 21 and 22 (only the reference numeral 22 on the front side is shown) attached to the upper rear part of these pivot plates 16 and 17, and these This is a vehicle composed of sub-frames 23 and 24 (only the reference numeral 24 on the front side is shown) for reinforcing the seat rails 21 and 22.

  Reference numerals 25 and 26 (only the reference numeral 26 on the front side are shown) are support members that are interposed between the main frames 13 and 14 and the engine 35 and fix the engine 35 to the main frames 13 and 14.

  In the motorcycle 10, a front fork 31 is attached to the head pipe 12 so as to be steerable, a front wheel 32 is attached to the lower end of the front fork 31, a bar handle 33 is attached to the top of the front fork 31, and the main frames 13, 14 and The engine 35 is attached to the pivot plates 16 and 17, the swing arm 37 is attached to the pivot plates 16 and 17 via the pivot shaft 36 so as to be swingable up and down, and the rear wheel 38 is attached to the rear end of the swing arm 37. The rear cushion unit 41 is attached to each of a cross pipe (not shown) and the swing arm 37 provided between the two.

  The front fork 31 includes a top bridge 45 and a bottom bridge 46 that connect left and right, and a headlamp 47 as an illumination device is attached to the top bridge 45 and the bottom bridge 46.

  The engine 35 includes a crankcase 51 and a cylinder portion 52 raised from the crankcase 51. A throttle body 56 is connected to a rear portion of a cylinder head 53 constituting the cylinder portion 52 via an intake pipe 54. An exhaust pipe 57 is connected to the front portion of the head 53, and a muffler 58 is connected to the rear end of the exhaust pipe 57 extending rearward.

  The engine 35 includes an oil cooler 61 that cools internal oil (lubricating oil) below, and an oil pan 62 that serves as an oil reservoir attached to the lower portion of the crankcase 51 behind the oil cooler 61. Reference numeral 64 denotes a water pump.

In the figure, 71 is a front fender, 72 is a meter, 73 is a fuel tank attached to the upper part of the main frames 13 and 14, 74 is a seat attached to the seat rails 21 and 22, 76 is a rear body cover, 77 is a rear fender, 78 is Radiators 82 and 82 (only the reference numeral 82 on the front side) attached to the stay 81 on the main frames 13 and 14 side and the crankcase 51 of the engine 35 to be disposed in front of the engine 35 are steps for the driver. 83 and 83 (only the front side reference numeral 83 is shown) are passenger steps, and 84 and 84 (only the front side reference numeral 84 is shown) are step support brackets for supporting the passenger steps 83 and 83 .

  FIG. 2 is a right side view of a motorcycle heat exchanger according to the present invention. An oil cooler 61 as a heat exchanger 86 constitutes a lubrication mechanism with members such as an oil pump and an oil filter (not shown). This is a member that cools the engine 35 and maintains and adjusts the engine 35 at an appropriate temperature. The lubrication mechanism is provided in the engine 35 in order to circulate oil through the bearings and sliding parts of each part of the engine 35 and prevent wear and seizure of the bearings and sliding parts.

  The oil cooler 61 includes a right tank portion 88R that stores oil on the right side of the vehicle. The right tank portion 88 </ b> R is disposed behind the front wheel 32 and below the radiator 78 and below the crankcase 51.

The front surface 89R of the right tank portion 88R is smoothly continuous with the shape of the front surface 80 of the radiator 78, and an extension surface 91R is provided by extending the right tank portion 88R rearward. In addition, the rear portion 92R of the right tank portion 88R is formed on the oil pan 62.
93R is a right crankcase cover that covers the crankcase 51, 94 is a fastening bolt, and 95 is a radiator cap.

  FIG. 3 is a left side view of the heat exchanger for a motorcycle according to the present invention. The oil cooler 61 includes a left tank portion 88L for storing oil on the left side of the vehicle. The left tank portion 88 </ b> L is disposed behind the front wheel 32 and below the radiator 78 and below the crankcase 51.

  The front surface 89L of the left tank portion 88L is smoothly continued in the shape of the front surface of the radiator 78, the left tank portion 88L is extended rearward to form an extension surface 91L, and the extension surface 91L is along the lower surface 51a of the crankcase 51. At the same time, the rear portion 92L of the left tank portion 88L is formed on the oil pan 62.

  FIG. 4 is a perspective view of the motorcycle heat exchanger according to the present invention as seen from the left front. The oil cooler 61 as the heat exchanger 86 has a laminated structure below the radiator 78 and has a core portion 96 through which air passes. The right tank portion 88R is disposed on the right side of the core portion 96, and the outer plate 97R of the right tank portion 88R is positioned on the right side 79R of the radiator 78, the right crankcase cover 93R, and the right side of the oil pan 62. It constitutes a surface that is smoothly continuous with the surface 63R. 101 is a stand.

  FIG. 5 is a perspective view of the motorcycle heat exchanger according to the present invention as seen from the right front side. The oil cooler 61 as the heat exchanger 86 has a left tank portion 88L disposed on the left side of the core portion 96, and a left tank. The outer plate 97L of the portion 88L constitutes a surface that smoothly continues to the left side 79L of the radiator 78, the left crankcase cover 93L, and the left side 63L of the oil pan 62.

  That is, the motorcycle 10 in which a heat exchanger 86 including tank portions 88L and 88R for storing fluid on both the left and right sides and a core portion 96 for cooling the fluid provided between the tank portions 88L and 88R is disposed behind the front wheel 32. The heat exchanger 86 is disposed below the front of the engine 35, the tank portions 88L and 88R extend below the crankcase 51 of the engine 35, and the left and right tank portions 88L and 88R extend rearward. The outer plates 97L and 97R (see FIG. 4) of these tank portions 88L and 88R constitute a surface that smoothly continues with the vehicle body components 99 such as the radiator 78, the crankcase 51, and the oil pan 62. It is.

  In the present embodiment, since the heat exchanger 86 is the oil cooler 61 that cools the oil circulating through the lubrication mechanism of the engine 35, the left tank portion 88L and the right tank portion 88R can be used as oil tanks. By using the left and right tank portions 88L and 88R as oil tanks, the oil pan 62 of the engine 35 can be reduced.

FIG. 6 is a view for explaining an example and a comparative example of a motorcycle heat exchanger according to the present invention.
(A) is an embodiment, and an oil cooler 61 as a heat exchanger 86 includes a core portion 96 and tank portions 88L and 88R. Oil stored in the oil pan 62 of the engine 35 is left in the left tank by the oil pump 102. The oil in the left tank 88L is sent in the direction of arrow 104, sent to the right tank 88R in the direction of arrow 105 through the core 96, and the oil in the right tank 88R is sent in the direction of arrow 106. The oil 35 is returned to the engine 35 and has a function of lowering the oil temperature when the oil passes through the left tank portion 88L, the core portion 96, and the right tank portion 88R.

  The surface area of the oil cooler 61 will be described. When the surface area of the core portion 96 is S1, the surface area of the left tank portion 88L is S2, and the surface area of the right tank portion 88R is S3, the surface area Sj of the oil cooler 61 is (S1 + S2 + S3). .

  (B) is a comparative example, and the oil cooler 61B includes a core portion 96B and does not have a tank portion. The direction of circulation of oil entering and exiting the engine 35 is the same as (a), and the description thereof is omitted.

  The surface area of the oil cooler 61B will be described. When the surface area of the core portion 96 is S1, the surface area Sh of the oil cooler 61B is S1.

  When the surface area (Sj) of (a) and the surface area (Sh) of (b) are compared, Sh <Sj. As the surface area of the oil cooler increases, its cooling capacity can be increased, so that the cooling capacity of the oil cooler 61 having the tank parts 88L and 88R on the left and right is reduced, and the cooling of the oil cooler 61B having no tank part on the left and right. It can be much higher than its ability.

Next, the operation of the oil cooler which is one form of the heat exchanger described above will be described.
Returning to FIG. 5, since the tank portions 88L and 88R extend rearward, the front and rear lengths of the tank portions 88L and 88R are increased, and accordingly, the lengths of the tank portions 88L and 88R to which the wind hits are increased.
As a result, the heat radiation area of the tank portions 88L and 88R can be increased, and the capacity of the heat exchanger 86 can be increased.
Since the oil cooler 61 is disposed below the front of the engine 35, it can receive a sufficient amount of wind from the front without being blocked by the engine 35.

  In addition, since the tank portions 88L and 88R extend downward from the crankcase 51 of the engine 35, the vertical lengths of the tank portions 88L and 88R are increased, and therefore the lengths of the tank portions 88L and 88R to which the wind hits are increased. Since the front and rear lengths and vertical lengths of the tank portions 88L and 88R to which the wind hits are increased, the heat radiation area of the tank portions 88L and 88R can be increased, and the ability of the heat exchanger 86 can be further enhanced.

Since the outer plate 97L of the tank portion 88L constitutes a surface that smoothly continues with the vehicle body components 99 such as the radiator 78, the left crankcase cover 93L, and the oil pan 62, the outer surface of the tank portion 88L and the vehicle body configuration The outer surface of the component 99 can be smoothly connected. Since the outer surface of the tank portion 88L and the outer surface of the vehicle body component 99 are smoothly connected, the oil cooler 61 having good appearance can be obtained without providing a decorative cover.
The same applies to the tank portion 88R, and a description thereof will be omitted.

  Furthermore, since the capacity of the tank portions 88L and 88R provided on the left and right sides of the oil cooler 61 is large, it can also function as an oil tank, and the oil pan 62 can be downsized.

  In claim 1 and claim 2, the heat exchanger may not be an oil cooler. For example, a heat exchanger can be used as a radiator.

  The present invention is suitable for motorcycles.

1 is a right side view of a motorcycle including a heat exchanger according to the present invention. 1 is a right side view of a motorcycle heat exchanger according to the present invention. 1 is a left side view of a motorcycle heat exchanger according to the present invention. 1 is a perspective view of a motorcycle heat exchanger according to the present invention as viewed from the left front side. 1 is a perspective view of a motorcycle heat exchanger according to the present invention as viewed from the front right. It is a figure explaining the Example and comparative example of the heat exchanger for motorcycles which concern on this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Motorcycle, 35 ... Engine, 51 ... Crankcase, 61 ... Oil cooler, 86 ... Heat exchanger, 88L ... Right tank part, 88R ... Left tank part, 96 ... Core part, 97L ... Outer plate of left tank part 97R ... outer plate of right tank part, 99 ... car body component.

Claims (3)

In a motorcycle in which a heat exchanger composed of a tank part that stores fluid on both the left and right sides and a core part that is provided between these tank parts and cools the fluid is disposed behind the front wheel,
A heat exchanger for a motorcycle, wherein the tank portion extends rearward, and an outer plate of the tank portion exposed to the outside of the vehicle forms a surface that smoothly continues with vehicle body components.   2. The heat exchanger for a motorcycle according to claim 1, wherein the heat exchanger is disposed at a front lower side of the engine, and the tank portion extends below a crankcase of the engine. The heat exchanger, the heat exchanger for a motorcycle according to claim 1 or claim 2, wherein the a Oiruku La for cooling the oil of the engine.

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