JP2583132B2 - Heat exchanger for motorcycles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention conforms to the outer peripheral shape of a motorcycle or a three-wheeled motor vehicle, and effectively utilizes heat flowing along the side surface of the two- or three-wheeled motor vehicle. About the exchanger.

[Conventional technology]

The heat exchanger for motorcycles cannot have a large width due to restrictions on the body structure. Therefore, the heat radiation area of the heat exchanger core must be relatively small, and the improvement of the heat exchange performance has reached its limit.

 In addition, a similar problem also occurs in a motorcycle.

Therefore, one of the applicants of the present invention has proposed in Japanese Patent Application Laid-Open No. Sho 64-29612 an arrangement in which a second heat exchanger is arranged in a space below a heat exchanger mounting portion of a motorcycle. Although this is excellent in that the heat radiation area of the heat exchanger is increased, such an arrangement often cannot be obtained due to styling.

A radiator for a motorcycle engine described in Japanese Utility Model Laid-Open No. 59-92369 has been proposed in which a vertically long side radiator is arranged on the left and right sides of a horizontally long central radiator, and tanks of the respective radiators are connected by pipes. ing. Further, a radiator device for a water-cooled engine of a motorcycle described in Japanese Utility Model Application Laid-Open No. 59-60022 has been proposed in which both the left and right sides of the radiator are bent at right angles toward the front, and the radiator is aligned with a wind guide port at the front end of the cowling. ing.

In each of these heat exchanger cores for motorcycles, a vertically long radiator is disposed on the left and right of a horizontally long flat flat central radiator. In the radiator having such a structure, separate airflows flow through the horizontally long central radiator and the vertically long side radiators provided on the left and right sides of the central radiator.

However, the airflow flowing through the vertically long side radiator has a drawback that the amount of air flow per unit area is smaller than that of the horizontally long center radiator. This is because the side radiator has a small front surface area and a large portion parallel to the air flow direction, so that the amount of air flow is smaller than that of the central radiator.

[Means for solving the problem]

In view of the above, an object of the present invention is to eliminate the above-mentioned disadvantages, and to provide a simple structure having improved heat exchange performance, in which air flows sufficiently through the heat exchanger cores located on both sides. The following configuration is used to achieve this.

The heat exchanger for a motorcycle according to the present invention is located between the front wheel 1 and the engine 2, wherein the core 3 faces forward and is disposed on the center axis of the vehicle body. A main heat exchanger 5 having a large front surface area that is convexly curved rearward, and a sub heat exchanger 6 having a front area connected to both ends of the main heat exchanger 5 and extending rearward and having a small front area. And characterized in that:

In a preferred embodiment of the present invention, the main heat exchanger 5 and the sub heat exchanger 6 are housed in a cowl 27 of a motorcycle.

Further, the length of the secondary heat exchanger 6 in a direction parallel to the front-rear direction of the motorcycle is
The core 3 is longer than that of the core 3 and protrudes rearward of the vehicle body.

[Action]

ADVANTAGE OF THE INVENTION According to the heat exchanger for motorcycles of this invention, the position of a slave heat exchanger can be made forward by the curvature of a main heat exchanger. Moreover, since the main heat exchanger is curved, the cooling air passing through the main heat exchanger is smoothly guided to the side of the vehicle body, and the cooling efficiency of the sub heat exchanger is improved. This is because the main heat exchanger is located between the front wheel and the engine, and is curved convexly rearward in a plan view, so that the airflow passing through the main heat exchanger can be smoother to the side of the engine. Because it leads. The guided air flow then cools the slave heat exchanger. This means that the airflow once used for cooling after flowing through the main heat exchanger is used again for cooling the slave heat exchanger, and a space-saving and efficient heat exchanger is obtained.

〔Example〕

Next, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a side view of a motorcycle having the heat exchanger of the present invention, and FIG. 2 is a schematic plan view showing the inside of a cowl 27 thereof. 3 to 5 show the same heat exchanger, FIG. 3 is a plan view thereof, FIG. 4 is a rear view thereof, FIG. 5 is a side view thereof, and FIG.
FIG. 7 is a rear view of the slave heat exchanger 6 of the heat exchanger, and FIG.
FIG. 8 is a sectional view taken along the line VII-VII of FIG.
FIG. 2 is a sectional view taken along the arrow II. FIG. 9 is an explanatory view showing a cooling water flow path according to the embodiment of the present invention.

In the heat exchanger of this embodiment, tanks 4 are arranged on both sides of a curved main heat exchanger 5 as shown in FIG. Is installed in communication. In FIG. 4, each tank 4
Is provided with a partition 28 at an intermediate portion in the vertical direction. Then, the engine cooling water flows through the main heat exchanger 5 and the sub heat exchanger 6 as shown by arrows in FIG. That is, the high-temperature engine cooling water flows from the inlet pipe 12 to the right tank 4
Inflow above 28. Part of the cooling water flows through the upper part of the core 3 and enters the upper part of the left tank 4. Then, it flows through the inside of the left sub-heat exchanger 6 and flows into the lower part of the left tank 4. Another part of the cooling water in the upper part of the right tank 4 flows around the lower part of the core 3 circumventing the right side heat exchanger 6 and flows out of the outlet pipe 13.

In this embodiment, the main heat exchanger 5 is a corrugated fin-type heat exchanger made of aluminum and has a pair of tanks 4 and 4 spaced apart from each other on the left and right sides. The part penetrates liquid-tight. The corrugated fins are in contact between the flat tubes, and the contact portions are brazed and fixed. Also,
A pair of inlets and outlets are opened on the outer side surfaces of the pair of tanks 4 vertically apart from each other, and these are the inlet 24 and outlet 25 of the sub-heat exchanger 6.
Linked to Next, the secondary heat exchanger 6 is also made of aluminum and is formed as shown in FIGS. That is, a plurality of elements 8 are stacked in the thickness direction. Each of the elements 8 is obtained by superposing a pair of dish-shaped plates in opposite directions and brazing the periphery thereof in a liquid-tight manner. As shown in FIGS. 6 and 7, the upper portion of the dish-shaped plate forms a cooling water tank portion, and an inlet 24 and an outlet 25 are opened in the tank portion. A bolt hole 17 is provided at an intermediate portion between the two ports, and a spacer is interposed in the bolt hole 17 as shown in FIG.
The space between the outlets 25 is closed. In addition, each element 8 is formed such that one end thereof is thicker than other portions. And
The other end of each element 8 is provided with a projection 22 for a spacer. In this embodiment, four elements 8 are stacked, and a corrugated fin 21 is interposed between them, and the respective contact portions are brazed and fixed in a liquid-tight manner. In addition, the entrance / exit hole is not bored in the outer surface side plate of the element 8 located at the outermost side. Further, a boss portion is provided in the entrance / exit hole of the element 8 located at the innermost side, and is formed as shown in FIG. The interior of each element 8 thus formed is provided with a partitioning projection 23 projecting from the center line thereof, and flows in from the inlet 24, and the cooling water flows around the tip of the partitioning projection 23 in a U-shape. Reach exit 25. The heat exchanger thus constructed is mounted on a motorcycle as shown in FIGS.
That is, the heat exchanger is disposed between the engine 2 and the front wheels 1 and is housed inside the cowl 27.

In this embodiment, the main heat exchanger 5 has a pair of shrouds 10 on the back of the core 3 as shown in FIGS.
Are fixed to brackets 19 provided above and below the core 3. Three stays having one end fixed to the outer periphery of the shroud 10 are formed radially, and the fan motor 9 is supported at the center. The boss of the fan 29 shown in FIG. 3 is fixed to the rotation shaft of the fan motor 9. A filler neck for water supply is located at the upper end of the tank 4.
33 is protruded, and the water supply cap 18 is
Are detachably fitted. A pressure valve (not shown) protrudes from the inner surface of the water supply cap 18. 3 and 4, a surge tank communication pipe 20 is formed in the filler neck 33. One end of a hose is connected to the surge tank communication pipe 20, and the other end is connected to a surge tank (not shown). . These water caps 18
The fan 29 is a known one.

Next, in the embodiment, as shown in FIG. 2, the main heat exchanger 5 is arranged on the center line of the vehicle body, and the concave curved surface of the core 3 is directed forward. The longitudinal direction of the slave heat exchanger 6 is the cowl 27.
Is located substantially parallel to the inner surface of the engine 2 and on the side of the engine 2. An opening 30 is formed in the cowl 27 as shown in FIG. The position of the opening 30 is determined in consideration of the shape of the cowl 27, the arrangement of the main heat exchanger 5 and the sub heat exchanger 6, and the like.
It is formed so that the flow of the air inside is the best. With this heat exchanger arranged in this way, air flows in from the front end opening of the cowl 27 as the motorcycle travels, a large amount of air flows through the main heat exchanger 5, and the air and the tank 4 The air circulating on the side passes through the secondary heat exchanger 6 and opens.
Outflow from 30. As shown in FIG. 2, the cowl 27 is formed so that its front end is narrowed toward the center from the side of the vehicle body toward the front, and has a large opening at its front end. Therefore, a relatively large space portion is formed in the cowl 27 from a portion slightly rearward from the front end portion. Therefore, in this embodiment, the slave heat exchanger 6 is arranged so as to match the space, and the air flow is effectively guided to the slave heat exchanger. In the secondary heat exchanger 6, the stacked radiators are arranged in parallel in the front-rear direction to reduce the front area and increase the heat radiation area. In addition, the air guiding and scavenging are smoothly performed as a whole.

(Modification example)

13 and 14 show another embodiment of the slave heat exchanger 6. In this embodiment, the outer surface on one side of the slave heat exchanger 6 is formed in a bellows shape, and a partition for dividing the inside into two parts is provided. Is provided. Then, the cooling water circulating in the inside circulates around the tip of the partition so as to make a U-turn.
Next, FIG. 15 shows a third embodiment of the slave heat exchanger 6, the outer periphery of which is formed in the shape of a water jacket of an engine.

16 and 17 show a secondary heat exchanger 6 according to a fourth embodiment of the present invention. In this embodiment, the cooling water flowing into the upper header flows through the lower header through a plurality of tubes. Plate fins are arranged on the outer surface of each tube so as to be located in the longitudinal direction in the air flow direction.

Next, the flow path of the cooling water is not limited to the embodiment of FIG. 9, but may be as shown in FIGS. In FIG. 10, the engine cooling water first flows into the secondary heat exchanger 6, a part of which flows through the interior of the secondary heat exchanger 6, and the other cooling water flows directly into the inlet side tank of the main heat exchanger 5. Inflow. Then, it flows through the tube of the core 3 of the main heat exchanger 5 and reaches the outlet tank. A part of the cooling water in the outlet tank flows through the inside of the left side heat exchanger 6 and is led to the engine, and the other part is directly led to the engine.

Next, in the embodiment of FIG. 11, the engine cooling water flows from the lower part of the sub heat exchanger 6 in the embodiment of FIG. 10, whereas it flows in from the upper part of the sub heat exchanger 6. . Further, in the embodiment of FIG. 12, all of the engine coolant flowing from the lower end of the sub heat exchanger 6 flows through the sub heat exchanger 6 and the upper half of the main heat exchanger 5, and The auxiliary heat exchanger 6 makes a U-turn and circulates in the lower half core of the main heat exchanger 5 to return to the engine.

Further, it goes without saying that the use of the heat exchanger of the present invention is not limited to motorcycles, but can be similarly applied to motorcycles having a narrow vehicle width.

〔The invention's effect〕

The heat exchanger for motorcycles according to the present invention is located between the front wheel 1 and the engine 2, and the main heat exchanger 5 having a large front surface area is formed so as to be convexly curved rearward in a plan view. The front end of the sub-heat exchanger 6 having a small front area is connected and extends rearward. Therefore, the position of the slave heat exchanger can be set forward by the curvature of the main heat exchanger. As a result, the cooling air that has passed through the main heat exchanger is smoothly discharged to the side of the vehicle body, and the cooling air cools the slave heat exchanger again. Can be cooled. This is because the main heat exchanger is curved and the airflow passing therethrough can be directed to the slave heat exchanger.

In addition, since the main heat exchanger is curved, the end of the secondary heat exchanger can be located more forward, the installation space for the secondary heat exchanger can be used effectively, and efficient heat exchange can be achieved in a small space. Vessels can be provided.

Further, both the main heat exchanger and the sub heat exchanger of the present invention are housed in the cowl 27, so that air can be efficiently blown to the sub heat exchanger 6.

[Brief description of the drawings]

FIG. 1 is a side view of a motorcycle having the heat exchanger of the present invention, and FIG. 2 is a schematic plan view showing the inside of a cowl 27 thereof. 3 to 5 show the same heat exchanger, FIG. 3 is a plan view thereof, FIG. 4 is a rear view thereof, FIG. 5 is a side view thereof, and FIG.
FIG. 7 is a rear view of the slave heat exchanger 6 of the heat exchanger, and FIG.
FIG. 8 is a sectional view taken along the line VII-VII of FIG.
FIG. 2 is a sectional view taken along the arrow II. FIG. 9 is an explanatory view showing a cooling water flow path according to the embodiment of the present invention. 10 to 12 show other embodiments of the cooling water flowing in the sub heat exchanger 6 and the main heat exchanger 5, respectively. 13 and 14 show a second embodiment of the slave heat exchanger 6 according to the present invention. FIG. 13 is a schematic perspective view of the slave heat exchanger 6, FIG. Vessel 6
FIG. 16 is a schematic perspective view of the third embodiment, FIG. 16 is a schematic perspective view of the fourth embodiment, and FIG. 17 is a longitudinal sectional view showing a part of the tube. 1 front wheel 2 engine 3 core 4 tank 5 main heat exchanger 6 slave heat exchanger 7 core part 8 element 9 fan motor 10 ... Shroud 11 ... Bolt, 12 ... Inlet pipe 13 ... Outlet pipe, 14 ... Mounting flange 15 ... Intermediate body, 16 ... O-ring groove 17 ... Bolt hole, 18 ... Water supply cap 19 … Bracket 20… Surge tank communication pipe 21… Corrugated fin, 22… Convex part 23… Partition convex part 24… Inlet, 25… Outlet 26… Corrugated fin, 27… Cowling 28… Partition, 29… Fan 30… Opening, 31… Tube 32… Plate fin, 33… Filler neck

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Yoshihiro Matsuo 1-4-1 Chuo, Wako-shi, Saitama Pref. Honda Technology Laboratory Co., Ltd. (56) Reference Reference 59-92369 (JP, U)

Claims (3)

(57) [Claims] In a heat exchanger for a motorcycle, which is located between a front wheel 1 and an engine 2, a core 3 faces forward and is disposed on a center axis of a vehicle body, and a rear view in a plan view. A main heat exchanger 5 having a large front surface area that is convexly curved;
A heat exchanger for motorcycles, characterized in that the heat exchanger has a front end connected to both ends of the main heat exchanger 5 and a rear heat exchanger 6 extending rearward and having a small front area. 2. The length of the sub heat exchanger 6 in a direction parallel to the front-rear direction of the motorcycle is set to be equal to the length of the main heat exchanger 5.
2. The heat exchanger for motorcycles according to claim 1, wherein the heat exchanger is longer than that of the core 3 and protrudes rearward of the vehicle body. 3. A heat exchanger for a motorcycle according to claim 1, wherein said main heat exchanger and said slave heat exchanger are accommodated in a cowl of a motorcycle.