JP2009180199A - Radiator device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce operation noise of a fan for cooling a radiator and reduce electric current consumption. <P>SOLUTION: This radiator device for a vehicle includes a radiator 3 circulating cooling water of an engine and a plurality of cooling fans. The cooling fans comprise a first fan 4 operated while cooling water temperature of the engine 28 is prearranged first water temperature or higher and a second fan 5 operated while cooling water temperature of the engine 28 is prearranged second water temperature which is higher than the first water temperature, or higher. A diameter of the first fan 4 is larger than that of the second fan 5. The first fan 4 is disposed at a cooling water inlet side of the radiator and the second fan 5 is disposed at a cooling water outlet side of the radiator 3. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle radiator device, and more particularly, to a vehicle radiator device including a plurality of cooling fans for cooling the radiator.

  Engines that drive vehicles such as motorcycles and four-wheeled vehicles employ engine cooling devices that circulate cooling water between a water jacket of an engine and a radiator and radiate the cooling water using the radiator.

  For example, Japanese Patent Laid-Open No. 2003-13735 provides a plurality of cooling fans for cooling one radiator, one of which is directly activated by a fan switch, and the remaining cooling fans are turned on by turning on the fan switch. A radiator fan control device that is activated by turning on an energized relay is disclosed. According to this fan control device, since the plurality of cooling fans are started at different times, the startup current that flows instantaneously when the cooling fan is started is temporally distributed to reduce the capacity of wiring and fuses. Can do.

Japanese Utility Model Laid-Open No. 3-49326 discloses an engine cooling system in which one cooling fan is provided for one radiator, and the amount of air is changed by switching the number of rotations of the cooling fan according to the cooling water temperature of the radiator. Is disclosed.
JP 2003-13735 A Japanese Utility Model Publication No. 3-49326

  The fan control device described in Patent Document 1 can reduce the starting current. However, since the two fans are rotating at the same time after starting, the current consumption of the motorcycle with a relatively small battery capacity is large. Not suitable for cooling devices. In addition, since a plurality of fans are rotated, the operating noise of the fans is loud and the amount of air exhausted from the radiator is increased. Furthermore, since a plurality of fans are rotating at the same time, the cooling performance cannot be changed. That is, if the size and number of fans are determined so as to be suitable for steady operation, the engine may be overcooled immediately after the engine is started or when the vehicle is traveling at high speed.

  On the other hand, in the engine cooling device described in Patent Document 2, since the number of rotations of the fan can be changed, the air volume can be adjusted. However, since the motor speed of the cooling fan is controlled to change the rotation speed, there is a problem that the motor for driving the fan becomes special.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle radiator device that solves the above-described problems and makes it possible to reduce operating noise of a cooling fan, reduce exhaust air from a radiator, and reduce current consumption.

  The present invention for solving the above-described problems is directed to a vehicle radiator device having a radiator that circulates engine coolant and a plurality of fans that cool the radiator. There is a first feature in that the first fan is operated at a temperature equal to or higher than the first water temperature and the second fan is operated at a temperature equal to or higher than the second water temperature at which the engine coolant temperature is higher than the first water temperature.

  Further, the present invention has a second feature in that the diameter of the first fan is larger than that of the second fan.

  Further, the present invention has a third feature in that the first fan is disposed on the cooling water inlet side of the radiator and the second fan is disposed on the cooling water outlet side of the radiator.

  According to the present invention having the first feature, only the first fan is operated when the engine coolant temperature is equal to or lower than the second coolant temperature. Therefore, if the engine water temperature that is expected in normal driving such as driving in a flat city is set as the first water temperature, only the first fan is operated in most vehicle driving, so that power consumption is reduced. It is possible to suppress the fan operating noise and the amount of exhaust air from the radiator.

  According to the present invention having the second feature, the cooling water temperature does not increase greatly during normal traveling, so that in most cases of normal traveling, sufficient cooling performance can be obtained by operating only the large-diameter first fan. . Since the second fan is additionally operated only when traveling at a high speed and a high load with a high cooling water temperature, the diameter of the second fan can be made smaller than that of the first fan to reduce power consumption.

  According to the present invention having the third feature, since the cooling water inlet side of the radiator is hotter than the outlet side, the first fan having a large diameter is arranged on the cooling water inlet side, thereby further effective cooling. It can be performed.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a top view of a main body portion of a vehicle radiator device according to an embodiment of the present invention, that is, an assembly of a radiator and a cooling fan (radiator device main body), and FIG. 2 is a rear view thereof. The radiator device main body 1 is disposed immediately after the front wheel 2 of the motorcycle, and includes a radiator 3 and cooling fans 4 and 5. The radiator 3 is a lateral flow type including tanks 6 and 7 provided on the left and right sides, and a core 8 disposed between the tanks 6 and 7, respectively. The core 8 includes a cooling water pipe 8 in which a plurality of horizontally extending pipes are arranged in the vertical (vertical) direction, and corrugated fins 9 disposed between adjacent pipes and in contact with the pipes on both sides. Become. The tank 6 is provided on the inlet side of the cooling water pipeline 8, and the tank 7 is provided on the outlet side of the cooling water pipeline 8.

  The tanks 6 and 7 have a length over the entire length in the height direction of the radiator 3, and a cooling water inlet fitting 10 is joined to the center in the height direction of the tank 6 on the inlet side, and the tank 7 on the outlet side A cooling water outlet metal fitting 11 is joined to the central portion in the height direction. A cooling water bypass outlet fitting 12 is joined to the upper part of the tank 6 on the inlet side.

  Frames 13 and 14 are provided on the upper and lower portions of the radiator 3, respectively. Brackets 15 and 16 are joined to the upper left and right of the upper frame 13, respectively. A bracket 17 is also joined to the center of the lower surface of the lower frame 14. The brackets 15, 16, and 17 are metal fittings for connecting the radiator 3 to the body frame of the motorcycle, and have holes through which mount bolts (not shown) are passed. Further, L-shaped angles 18 and 19 are joined to the upper frame 13.

  The cooling fans 4 and 5 are all driven by DC motors 20 and 21. The cooling fan 4 is disposed on the upper entrance rear surface of the radiator 3, and the cooling fan 5 is disposed on the upper exit rear surface of the radiator 3. The cooling fan 4 has a larger diameter than the cooling fan 5. For example, the cooling fan 4 has a diameter of 170 mm and the cooling fan 5 has a diameter of 140 mm. The large-diameter cooling fan 4 is arranged on the side of the tank 6 on the inlet side where high-temperature cooling water is introduced so as to increase the cooling effect.

  Three stays 22, 23, 24 extend radially from the motor 20, the ends of the stays 22 are connected to the L-shaped angle 18, and the ends of the stays 23, 24 are connected to the tank 6. Similarly, three stays 25, 26, 27 extend radially from the motor 21, the ends of the stays 25 are connected to the L-shaped angle 19, and the ends of the stays 26, 27 are connected to the tank 7.

  In the radiator device, a cooling water inlet fitting 10 is connected to a cooling water outlet side of an engine water jacket (not shown) via a hose (not shown), and a cooling water outlet fitting 11 is connected to a cooling water inlet side of the water jacket. It is connected via a hose (not shown) so that cooling water can be circulated between the radiator 3 and the water jacket. The bypass outlet fitting 12 is connected to the cooling water inlet side of the water jacket through a valve (not shown), and when the cooling water temperature becomes lower than a predetermined value, the valve is opened to bypass the radiator 3 and cool it. Feed water to the water jacket.

  In the radiator device of the present embodiment, the two cooling fans 4 and 5 are not always rotated. When the cooling water is at a predetermined low temperature, only the cooling fan 4 on the inlet side is rotated so that the cooling water has a predetermined temperature. When the temperature is high, the cooling fan 5 on the outlet side is rotated in addition to the cooling fan 4 on the inlet side.

  FIG. 3 is a system configuration diagram of the radiator device according to the embodiment of the present invention. The water jacket 28a of the engine 28 is provided with a cooling water temperature sensor 29, and the temperature detected by the temperature sensor 29 is input to the ECU 30. The ECU 30 is provided with a cooling water temperature determination unit 31 having a two-stage temperature threshold, and switches (for example, semiconductor switches) 32 and 33 that are turned on / off by the determination of the cooling water temperature determination unit 29. The switch 32 is connected to one end of the coil portion 34 a of the relay 34, and the switch 33 is connected to one end of the coil portion 35 a of the relay 35. The other ends of the coil portions 34a and 35a are connected to the battery 36, respectively. Further, the battery 36 is connected to the large-diameter cooling fan 4 through the fuse 37 and the contact part 34 b of the relay 34. Further, the battery 36 is connected to the small-diameter cooling fan 5 through the fuse 38 and the contact part 35 b of the relay 35. The cooling water temperature determination unit 31 is realized as a function of a CPU included in the ECU 30.

  Next, the function and operation of the cooling water temperature determination unit 29 will be described with reference to FIGS. FIG. 4 is a timing chart showing the movement of the radiator device when the cooling water temperature is kept relatively low, and FIG. 5 shows the movement of the radiator device when the cooling water temperature can be relatively high. It is a timing chart which shows. For example, the operation shown in FIG. 4 corresponds to when the vehicle stops due to a traffic jam or a red light when traveling in the city, or when traveling at a low speed. Moreover, FIG. 5 corresponds to the operation at the time of stopping after high-speed traveling or high-load traveling.

  The cooling water temperature determination unit 31 has two high and low temperature threshold values. The low threshold value T1 is a threshold value of the large-diameter cooling fan 4, and has a start threshold value T1on and a stop threshold value T1off. On the other hand, the high threshold value T2 is a threshold value of the small-diameter cooling fan 5, and has a start threshold value T2on and a stop threshold value T2off.

  In FIG. 4, when the cooling water temperature rises with time and exceeds the activation threshold T1on (t1), the switch 32 (see FIG. 3) is turned on to activate the large-diameter cooling fan 4. As a result, the large-diameter cooling fan 4 is started, but the temperature of the cooling water rises for a while. Then, the cooling water temperature gradually falls, and when the cooling water temperature becomes equal to or lower than the stop threshold value T1off (t2), the switch 30 is turned off and the cooling fan 4 is stopped.

  In FIG. 5, when the cooling water temperature rises with time and exceeds the activation threshold T1on (t3), the switch 32 (see FIG. 3) is turned on to activate the large-diameter cooling fan 4. Even after the large-diameter cooling fan 4 is started, the temperature of the cooling water may further increase when the vehicle stops at a high speed or a high load. Then, when the cooling water temperature exceeds the activation threshold T2on (t4), the switch 33 (see FIG. 3) is turned on to activate the small-diameter cooling fan 5. Even after the small-diameter cooling fan 5 is started, the cooling water temperature rises for a while, but eventually the cooling water temperature starts to drop, and first, the switch 33 is turned off when the cooling water temperature falls below the stop threshold T2off (t5). Thus, the small-diameter cooling fan 5 stops. When the cooling water temperature further falls and becomes the stop threshold value T1off or less (t6), the switch 32 is also turned off, and the large-diameter cooling fan 4 stops.

  Thus, according to the radiator device of the present embodiment, not all of the plurality of cooling fans are always rotated, but both of the cooling fans 4 and 5 or only the large-diameter cooling fan 4 are rotated by the cooling water temperature. Therefore, overcooling can be prevented and a low power consumption type can be achieved. In particular, since the large-diameter cooling fan is arranged on the side where the cooling water is introduced into the radiator 3, a sufficiently high cooling performance can be obtained only with the large-diameter cooling fan 4 at normal load, and only at high load. The cooling performance can be improved by additionally rotating the small-diameter cooling fan 5.

  During normal driving, that is, high-speed driving or high-load driving, etc., only one of the cooling fans is rotated, so power consumption can be reduced, and cooling fan operating noise and exhaust air can be reduced. Can be achieved.

  In the system configuration diagram shown in FIG. 3, power supply systems for the cooling fans 4 and 5 are individually provided, and fuses 37 and 38 are provided for each system. However, such a configuration can be modified as follows.

  FIG. 6 is a system configuration diagram of a radiator device according to a modification, and the same reference numerals as those in FIG. 3 denote the same or equivalent parts. In this example, the systems for supplying power from the battery 36 to the cooling fans 4 and 5 are combined into one, and a single fuse 39 is provided on the combined system (line). According to the present embodiment, since the two cooling fans 4 and 5 are not started at the same timing, the inrush current at the start-up can be reduced even though a plurality of cooling fans are provided. Therefore, even in this modification in which a single fuse 39 is provided in the drive system of the cooling fans 4 and 5, it is not necessary to make the fuse 39 have a large capacity for which a large inrush current is planned.

  In addition, this invention is not limited to the said embodiment, It can change without deviating from a claim. For example, the radiator 3 is not limited to the one in which the core 8 is bent in the longitudinal direction of the vehicle as shown in FIG. Further, the number of cooling fans is not limited to two, and a larger number of cooling fans may be provided. In short, it is only necessary to start / stop control based on at least two temperature thresholds so that two or more cooling fans having at least two types of air blowing capabilities are not simultaneously started / stopped.

It is a top view of the main-body part of the radiator apparatus which concerns on one Embodiment of this invention. It is a rear view of the main-body part of the radiator apparatus which concerns on one Embodiment of this invention. 1 is a system configuration diagram of a radiator device according to an embodiment of the present invention. It is an operation | movement timing chart of a radiator apparatus when the state whose cooling water temperature is comparatively low is maintained. It is an operation | movement timing chart of a radiator apparatus in case a cooling water temperature can be in a comparatively high state. It is a system block diagram of the radiator apparatus which concerns on the 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Radiator apparatus main body, 2 ... Front wheel of motorcycle, 3 ... Radiator, 4 ... Large diameter fan, 5 ... Small diameter fan, 6, 7 ... Tank, 8 ... Core, 28 ... Engine, 30 ... ECU, 31 ... Cooling water temperature Judgment part

Claims (3)

In a vehicle radiator device having a radiator for circulating engine cooling water and a plurality of fans for cooling the radiator,
The plurality of fans are
A first fan operated at an engine cooling water temperature equal to or higher than a first water temperature,
A radiator for a vehicle, comprising: a second fan that is operated at a cooling water temperature of the engine that is higher than a second water temperature that is higher than the first water temperature.   The radiator for a vehicle according to claim 1, wherein a diameter of the first fan is larger than that of the second fan.   3. The vehicle radiator device according to claim 2, wherein the first fan is disposed on a cooling water inlet side of the radiator and the second fan is disposed on a cooling water outlet side of the radiator.

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