JP2007320527A - Cooling device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling device for a vehicle capable of reducing air resistance in travelling the vehicle and restraining lowering of cooling performance of a heat exchanger loaded on the vehicle. <P>SOLUTION: A radiator grille 22 is arranged at a central part in the vehicle width direction of a front bumper, and a radiator grille 16 is arranged on the upper side of the vehicle of the radiator grille 22. Additionally, a shutter plate 30 to open and close the radiator grille 16 is arranged between the radiator grille 16 and a front surface upper part of a radiator/condenser 24, and a baffle plate 38 is arranged between the radiator grille 22 and a front surface lower part of the radiator/condenser 24. The radiator grille 16 is blocked by the shutter plate 30 in travelling the vehicle, and outside air W is introduced to the rear of the vehicle of the shutter plate 30 from the radiator grille 22 by the baffle plate 38. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a vehicular cooling device.

  A method has been devised in which the opening area of the outside air introduction portion is adjusted according to the temperature in the engine room, and the amount of outside air introduced from the outside air introduction portion into the engine room is adjusted (see, for example, Patent Document 1). According to this method, the air resistance while the vehicle is traveling can be reduced.

However, when a part of the outside air introduction part is closed, outside air is not introduced to the rear of the vehicle in the area where the outside air introduction part is blocked, so outside air is introduced into the heat exchanger disposed on the rear side of the outside air introduction part. There is a problem that a part that is not cooled is formed and the cooling performance of the heat exchanger is lowered.
Japanese Utility Model Publication No. 64-16422

  In view of the above facts, an object of the present invention is to reduce the air resistance during travel of the vehicle and to suppress a decrease in the cooling performance of the heat exchanger mounted on the vehicle.

  The vehicle cooling device according to claim 1 is mounted on a vehicle and is cooled by outside air, and is disposed in front of the heat exchanger and introduces outside air to the heat exchanger. A first air flow control member that opens and closes at least a part of the outside air introduction portion, and a second air flow control that guides the outside air from the open range of the outside air introduction portion to the vehicle rear of the first air flow control member And a member.

  In the vehicle cooling device according to claim 1, the heat exchanger is mounted on the vehicle, the outside air introduction part is disposed in front of the heat exchanger, and the outside air is introduced from the outside air introduction part to the heat exchanger. Then, the heat exchanger is cooled. Further, at least a part of the outside air introduction part is opened and closed by the first air flow control member.

  Here, when a part of the outside air introduction portion is blocked by the first air flow control member, the outside air is moved from the open range of the outside air introduction portion to the vehicle rear side of the first air flow control member by the second air flow control member. Not only the range in which the outside air introduction part of the heat exchanger opens and the range overlapping in the vehicle longitudinal direction but also the range in which the first air flow control member of the heat exchanger overlaps in the vehicle longitudinal direction are cooled. Therefore, since the variation in the cooling amount for each part of the heat exchanger when a part of the outside air introduction part is blocked by the first air flow control member can be suppressed, the air resistance during traveling of the vehicle is reduced, It is possible to suppress a decrease in the cooling performance of the heat exchanger mounted on the vehicle.

  The vehicle cooling device according to claim 2 is the vehicle cooling device according to claim 1, wherein the second air flow control member introduces the outside air as the opening area of the outside air introduction portion decreases. The inclination of the flow of the outside air introduced into the heat exchanger from the open range of the section toward the first air flow control member is increased.

  In the vehicle cooling device according to claim 2, the second air flow control member is configured to reduce a flow of the outside air introduced from the open range of the outside air introduction portion into the heat exchanger as the opening area of the outside air introduction portion decreases. The inclination toward the first air flow control member side is increased. Thus, when the opening area of the outside air introduction portion is adjusted by the first air flow control member, the range corresponding to the area of the first air flow control member of the heat exchanger is overlapped with the vehicle longitudinal direction. Necessary amount of outside air can be introduced.

  The vehicle cooling device according to claim 3 is the vehicle cooling device according to claim 2, wherein the second airflow control member introduces the outside air as the opening area of the outside air introduction portion decreases. The inclination of the flow of outside air introduced into the heat exchanger from the open range of the section toward the first air flow control member side is increased in order from the first air flow control member side. .

  In the vehicle cooling device according to claim 3, the second air flow control member is configured to reduce the flow of the outside air introduced into the heat exchanger from the open range of the outside air introduction portion as the opening area of the outside air introduction portion decreases. The inclination toward the first air flow control member side is increased in order from the first air flow control member side. Thus, outside air can be introduced in a well-balanced manner in a range overlapping with the first air flow control member of the heat exchanger in the vehicle longitudinal direction, a range where the outside air introduction portion of the heat exchanger is opened, and a range overlapping in the vehicle longitudinal direction.

  The vehicle cooling device according to claim 4 is the vehicle cooling device according to any one of claims 1 to 3, wherein the first air flow control member and the second air flow control member are provided. Is controlled based on at least one of the outside air temperature, the cooling load of the heat exchanger, and the vehicle speed.

  In the vehicle cooling device according to the fourth aspect, the first air flow control member and the second air flow control member are controlled based on at least one of the outside air temperature, the cooling load of the heat exchanger, and the vehicle speed. As a result, it is possible to minimize the time during which the outside air introduction part is opened, and to minimize the air resistance during traveling of the vehicle.

  As described above, it is possible to reduce the air resistance during traveling of the vehicle and to suppress the cooling performance of the heat exchanger mounted on the vehicle.

  Next, an embodiment of the vehicle cooling device of the present invention will be described with reference to FIGS.

  In the figure, the arrow FR indicates the vehicle front direction, the arrow UP indicates the vehicle upward direction, and the arrow IN indicates the vehicle width inside direction.

  FIG. 1 shows a vehicle 12 including a vehicle cooling device 10 according to the first embodiment. As shown in this figure, a front bumper 14 extends in the vehicle width direction at the front end of the vehicle 12. A radiator grill (outside air introduction portion) 16 is disposed on the upper side of the vehicle in the center of the vehicle width of the front bumper 14. Further, a headlamp 20 is disposed outside the width of the radiator grille 16, an engine hood 18 is disposed on the rear side of the radiator grille 16, and between the radiator grille 16 and the front bumper 14, The body general surface 19 extends in the vehicle width direction.

  As shown in FIGS. 1 and 2, the vehicular cooling device 10 includes the above-described radiator grill 16, a radiator grill (outside air introduction unit) 22 disposed in the vehicle width center of the front bumper 14, the radiator grill 16, A radiator / condenser (heat exchanger) 24 disposed on the rear side of the vehicle 22 and the front end of the engine room, and a grill shutter 26 disposed on the rear side of the radiator grill 16 and on the front side of the radiator condenser 24. And a bumper shutter 28 disposed on the rear side of the radiator grill 22 and on the front side of the radiator condenser 24.

  The radiator grill 16 and the upper front portion of the radiator / condenser 24 face each other in the vehicle front-rear direction, and the radiator grill 22 and the lower front portion of the radiator / condenser 24 face each other in the vehicle front-rear direction. The radiator grills 16 and 22 can introduce outside air W from the front to the rear of the vehicle, and the radiator condenser 24 is cooled by the outside air W introduced from the radiator grills 16 and 22.

  The grille shutter 26 includes a plurality of (for example, three as shown in FIG. 2) shutter plates 30 (first air flow control members) and a shutter drive mechanism 31. Each shutter plate 30 is a rectangular flat plate, and is supported by a rail member (not shown) so as to be slidable in the vehicle vertical direction in a range 32 on the rear side of the radiator grill 16 and a range 33 on the rear side of the general body surface 19 of the vehicle. Yes. The plurality of shutter plates 30 are disposed so as to extend in the vehicle width direction and overlap in the vehicle front-rear direction.

  Further, a hook portion (not shown) is formed at the width direction end portion (vehicle vertical direction end portion) of each shutter plate 30, and when a certain shutter plate 30 slides in the vehicle upper direction, the lower portion of the shutter plate 30 is The upper part of the shutter plate 30 stacked on the vehicle front side of the shutter plate 30 is engaged, and the shutter plate 30 stacked on the vehicle front side of the shutter plate 30 slides in the vehicle upward direction. When a certain shutter plate 30 slides in the vehicle lower direction, the shutter plate 30 superimposed on the vehicle front side of the shutter plate 30 slides in the vehicle lower direction under its own weight.

  The shutter drive mechanism 31 includes a motor 27, a drive gear 34 rotated by the motor 27, and a conductive belt 36 in which a tooth shape meshing with the drive gear 34 is continuously formed in the longitudinal direction. The drive gear 34 is disposed on the upper side of the vehicle in the range 32 so that the rotation shaft is parallel to the vehicle width direction. One end portion of the belt 36 in the longitudinal direction is fixed to the shutter plate 30 (the rearmost) located on the rearmost side of the plurality of shutter plates 30. For this reason, when the drive gear 34 rotates, in the above-described ranges 32 and 33, the longitudinal end of the belt 34 and the plurality of shutter plates 30 move in the vehicle vertical direction.

  Here, when the drive gear 34 rotates in one direction (counterclockwise direction shown in FIG. 2) A and the longitudinal end of the belt 36 and the plurality of shutter plates 30 move downward in the vehicle, FIG. As shown in FIG. 6, finally, a plurality of shutter plates 30 are stored in the above-described range 33. As a result, the entire range of the radiator grille 16 is opened, and the outside air W is introduced from the entire range of the radiator grille 16 to the front upper portion of the radiator condenser 24.

  Further, when the drive gear 34 rotates in the other direction (clockwise direction shown in FIG. 2) B and the one end in the longitudinal direction of the belt 36 and the plurality of shutter plates 30 move upward in the vehicle, FIG. As shown in FIG. 2, first, the vehicle lower end portion of the radiator grill 16 is closed by the rearmost shutter plate 30, and finally, as shown in FIG. All 16 areas are occluded. As a result, the introduction of the outside air W from the radiator grille 16 to the upper part of the front surface of the radiator condenser 24 is blocked.

  Here, the grille shutter 26 is configured such that a shutter plate 30 that is a plate material slides in the vehicle vertical direction, so that the width in the vehicle front-rear direction is reduced compared to a grille shutter that rotates the plate material. ing. This makes it possible to reduce the distance between the radiator grille 16 and the radiator condenser 24 as compared with the case where a grill shutter of a type that rotates a plate material is used.

  The bumper shutter 28 includes a plurality of (for example, three as shown in the figure) wind guide plates 38 (second air flow control members) and a shutter drive mechanism 40. Each of the air guide plates 38 is a rectangular plate member whose longitudinal cross section has a wing shape (a shape that is curved while gradually reducing the thickness), and is rotated by a rotating shaft 42 in a range 35 on the rear side of the radiator grill 22 in the vehicle. It is supported in a movable manner and extends in the vehicle width direction. The plurality of rotating shafts 42 extend in the vehicle width direction and are disposed so as to overlap in the vehicle vertical direction, and are inserted into one end portion (base end portion) of each air guide plate 38 in the width direction. Has been. The plurality of wind guide plates 38 are stacked in the vehicle vertical direction, and the other end portion (tip portion) in the width direction is disposed in the vehicle rearward direction.

  Further, the shutter drive mechanism 40 is engaged with a plurality of (for example, three as shown in FIG. 2) gears 44 through which the respective rotation shafts 42 are inserted, and a plurality of (for example, FIG. As shown in FIG. 2, two idle gears 46, a motor 29, and a drive gear 44 rotated by the motor 29 are provided. The drive gear 44 meshes with the gear 44 disposed at the lowermost side of the vehicle among the gears 44 (the lowest level).

  The plurality of gears 44 have different radii of rotation and the number of teeth. As the vehicle moves upward, the rotation radius and the number of teeth of the gear 44 are reduced. Therefore, the rotation of the drive gear 48 is transmitted while being accelerated from the lowest gear 44 to the highest gear 44.

  Here, as shown in FIG. 2A, the initial positions of the plurality of air guide plates 38 are set so that the plurality of air guide plates 38 are substantially parallel. With the plurality of wind guide plates 38 positioned at the initial position, the front end side of each of the wind guide plates 38 curves upward in the vehicle, but the amount of the curve is small, and the outside air W that has passed through the radiator grille 22 It passes straight between the wind plates 38 and hits the lower part of the front surface of the radiator capacitor 24.

  2B, when the drive gear 48 rotates in one direction (clockwise direction shown in FIG. 2) C, the plurality of gears 44 move in the other direction (counterclockwise direction shown in FIG. 2) D. The plurality of wind guide plates 38 rotate in the other direction D.

  Here, since the rotation of the drive gear 44 is transmitted while being accelerated from the lowest gear 44 to the highest gear 44, the rotation amount of the air guide plate 38 increases toward the vehicle upper side. Therefore, after the rotation of the drive gear 44 in one direction C is started, only the uppermost air guide plate 38 initially rectifies the outside air W, and then, as shown in FIG. Rectification of the outside air W by the second stage air guide plate 38 starts.

  That is, after the rotation of the drive gear 44 in one direction C is started, as shown in FIG. 2 (B), only the outside air W passing through the upper side of the uppermost wind guide plate 38 is initially the shutter plate. The outside air W that inclines toward the 30 side and passes the vehicle lower side of the uppermost air guide plate 38 passes between the air guide plates 38 as it is. Thereafter, as shown in FIG. 2C, the outside air W that has passed through the vehicle upper side of the second-stage air guide plate 38 from the top is inclined toward the shutter plate 30 side, and the second-stage air guide plate 38 from the upper side. The outside air W that has passed under the vehicle passes straight between the air guide plates 38 as it is. Further, the inclination of the flow of the outside air W passing through the upper side of the uppermost enclosed plate 38 toward the shutter plate 30 increases.

  Here, the motors 27 and 29 are controlled by the control unit 25 so that the drive gears 34 and 48 are synchronously rotated from the initial position shown in FIG. When the slide is started, rotation of the air guide plate 38 in the other direction D is started.

  As shown in FIG. 2B, the rearmost shutter plate 30 slides upward in the vehicle direction by the rotation of the drive gear 34 in the other direction B, and the front surface of the radiator condenser 24 from the lower end of the radiator grill 16 in the vehicle. Although the introduction of the outside air W to the upper part is blocked, at the same time, the uppermost air guide plate 38 rotates in the other direction by the rotation of the drive gear 48 in one direction C, so The inclination of the flow of outside air W introduced from the space between the upper air guide plate 38 and the front surface of the radiator condenser 24 toward the shutter plate 30 is increased. As a result, the outside air W is introduced into a range overlapping with the shutter plate 30 on the front surface of the radiator condenser 24 in the vehicle longitudinal direction.

  Further, as shown in FIG. 2C, all the shutter plates 30 slide in the vehicle upward direction due to the rotation of the drive gear 34 in the other direction B, and the outside air W from the radiator grill 16 to the upper front portion of the radiator condenser 24 When the introduction is completely interrupted, the uppermost air guide plate 38 further rotates in the other direction D from the state shown in FIG. The inclination of the flow of the outside air W introduced to the front surface of the radiator condenser 24 from between the position 38 and the shutter plate 30 side is further increased from the state shown in FIG. As a result, the outside air W is introduced to the vehicle upper end of the front surface of the radiator condenser 24.

  By the way, the control unit 25 includes a water temperature threshold Ta1 of the radiator condenser 24, an outside air temperature threshold Tb1 corresponding to the speed of the vehicle 12, a HV (High Voltage) battery (not shown) water temperature threshold Tc1, an inverter (not shown). A parameter table that defines a temperature threshold value Td1 (not shown) and a temperature threshold value Te1 of an HV (Hybrid Vehicle) motor (not shown) is stored. Further, the control unit 25 includes a temperature sensor (not shown) for detecting the water temperature of the radiator condenser 24, a speed sensor (not shown) for detecting the speed of the vehicle 12, a temperature sensor (not shown) for detecting the outside air temperature, Detection signals of a temperature sensor (not shown) that detects the water temperature of the HV battery, a temperature sensor (not shown) that detects the temperature of the inverter, and a temperature sensor (not shown) that detects the temperature of the HV motor are input. Thus, the control unit 25 controls the motors 27 and 29 according to the detection signal input from each sensor and the threshold value of each parameter stored in the parameter table.

  Hereinafter, a method of controlling the motors 27 and 29 by the control unit 25 will be described with reference to the flowchart of FIG. Here, a description will be given using a vehicle equipped with a hybrid engine as an example.

  When the hybrid engine is turned on, the processing routine is started and the routine proceeds to step 1. Note that the radiator grille 16 is opened by the grille shutter 26 when the processing routine is started. In step 1, whether or not the detected value of the temperature sensor for detecting the water temperature of the radiator condenser 24 is equal to or less than the threshold value Ta1 stored in the parameter table, that is, whether or not the water temperature of the radiator condenser 24 is within an allowable range. If the determination is affirmative and the determination is affirmative, the process proceeds to step 2. If the determination is negative, the process proceeds to step 8.

  In step 2, the threshold value Tb1 of the outside air temperature corresponding to the detection value of the speed sensor that detects the speed of the vehicle 12 is read from the parameter table, and the detection value of the temperature sensor that detects the outside air temperature is read from the parameter table. It is determined whether or not the outside air temperature is equal to or less than the threshold value Tb1, that is, whether or not the outside air temperature is within an allowable range determined according to the speed of the vehicle 12. If the determination is affirmative, the process proceeds to step 3. If the determination is negative, the process proceeds to step 8.

  In step 3, it is determined whether or not an air conditioner (not shown) is operated. If the determination is affirmative, the process proceeds to step 4, and if the determination is negative, the process proceeds to step 8.

  In step 4, it is determined whether or not the detected value of the temperature sensor for detecting the water temperature of the HV battery is equal to or less than the threshold value Tc1 stored in the parameter table, that is, whether or not the water temperature of the HV battery is within an allowable range. If the determination is affirmative, the process proceeds to step 5, and if the determination is negative, the process proceeds to step 8.

  In step 5, it is determined whether or not the detected value of the temperature sensor that detects the temperature of the inverter is equal to or less than the threshold value Td1 stored in the parameter table, that is, whether or not the temperature of the inverter is within the allowable range. If so, the process proceeds to step 6, and if the determination is negative, the process proceeds to step 8.

  In step 6, it is determined whether the detected value of the temperature sensor for detecting the temperature of the HV motor is equal to or less than the threshold value Te1 stored in the parameter table, that is, whether the temperature of the HV motor is within an allowable range. If the determination is affirmative, the routine proceeds to step 7, and if the determination is negative, the routine proceeds to step 8.

  In step 7, the motors 27 and 29 are driven synchronously, the radiator grille 16 is closed by the shutter plate 30, and the outside air W introduced from the radiator grille 22 to the front surface of the radiator condenser 24 is supplied to the air guide plate 38. As a result, not only the range behind the radiator grill 22 in front of the radiator condenser 24 but also the range behind the vehicle on the shutter plate 30 in front of the radiator condenser 24 is diffused.

Thus, when the radiator grille 16 is closed, the area behind the vehicle of the shutter plate 30 on the front surface of the radiator condenser 24 is also cooled. Therefore, variation in the cooling amount for each part of the radiator / condenser 24 when the radiator grille 16 is closed by the shutter plate 30 in order to reduce the air resistance while the vehicle 12 is traveling can be suppressed. _{(2) It} is possible to achieve both the reduction of the discharge amount and the securing of the cooling performance of the radiator condenser 24.

  On the other hand, in step 8, the motors 27 and 29 are not driven and the radiator grille 16 is maintained in the open state by the shutter plate 30, and the outside air flows from the radiator grilles 16 and 22 to the entire range of the front surface of the radiator condenser 24. W is introduced. As a result, the radiator condenser 24 can be sufficiently cooled, so that the water temperature of the radiator condenser 24, the water temperature of the HV battery, the temperature of the inverter, and the temperature of the HV motor can be maintained within allowable ranges, and the performance of the air conditioner is ensured. it can.

  Here, the radiator grill 16 is opened only when the outside air temperature, the cooling load of the radiator / condenser 24, the vehicle speed, etc. exceed the allowable range, and the time for the radiator grill 16 to be opened is minimized. The air resistance while the vehicle 12 is traveling can be minimized.

  In the present embodiment, only the radiator grill 16 serving as the outside air introduction section is opened and closed by the grill shutter 26 serving as the first air flow control member, and the radiator grill 22 serving as the outside air introduction section is always opened. Alternatively, the grill shutter 26 may be closed. That is, you may comprise so that the whole external air introduction part may be opened and closed by the 1st airflow control member.

  In the present embodiment, while the vehicle 12 is traveling, the radiator grille 16 on the upper side of the vehicle is closed, and the outside air W is guided from the radiator grille 22 on the lower side of the vehicle to the upper side of the radiator / condenser 24. The radiator grill 22 on the side may be closed, and the outside air W may be guided from the radiator grill 16 on the vehicle upper side to the vehicle lower side of the radiator condenser 24.

  Next, a modification of the control method of the motors 27 and 29 by the control unit 25 will be described with reference to the flowchart of FIG. The control unit 25 includes a water temperature threshold Ta1 and Ta2 (<Ta1) of the radiator condenser 24, an outside air temperature threshold Tb1 and Tb2 (<Tb1) according to the speed of the vehicle 12, and a water temperature threshold Tc1 of the HV battery. , Tc2 (<Tc1), inverter temperature threshold values Td1, Td2 (<Td1), and HV motor temperature threshold values Te1, Te2 (<Te1) are stored.

  When the hybrid engine is turned on, the processing routine is started and the routine proceeds to step 101. Note that the radiator grille 16 is opened by the shutter plate 30 when the processing routine is started. In step 101, it is determined whether the detected value Ta0 of the temperature sensor for detecting the water temperature of the radiator condenser 24 is Ta0 ≦ Ta2, Ta2 <Ta0 ≦ Ta1, or Ta0> Ta1, and Ta0 ≦ Ta2. If so, the process proceeds to step 102. If Ta2 <Ta0 ≦ Ta1, the process proceeds to step 110, and if Ta0> Ta1, the process proceeds to step 120.

  In step 102, the outside air temperature thresholds Tb1 and Tb2 corresponding to the detected value of the speed sensor for detecting the speed of the vehicle 12 are read from the parameter table, and the detected value Tb0 of the temperature sensor for detecting the outside air temperature is Tb0 ≦ Tb2. Whether Tb2 <Tb0 ≦ Tb1 or Tb0> Tb1 is determined. If Tb0 ≦ Tb2, the process proceeds to step 103. If Tb2 <Tb0 ≦ Tb1, the process proceeds to step 110, and Tb0> If it is Tb1, the routine proceeds to step 120.

  In step 103, it is determined whether or not the air conditioner is operating. If the determination is affirmative, the process proceeds to step 104. If the determination is negative, the process proceeds to step 120.

  In step 104, it is determined whether the detection value Tc0 of the temperature sensor for detecting the water temperature of the HV battery is Tc0 ≦ Tc2, Tc2 <Tc0 ≦ Tc1, or Tc0> Tc1, and if Tc0 ≦ Tc2. The process proceeds to step 105. If Tc2 <Tc0 ≦ Tc1, the process proceeds to step 110. If Tc0> Tc1, the process proceeds to step 120.

  In step 105, it is determined whether the detected value Td0 of the temperature sensor that detects the temperature of the inverter is Td0 ≦ Td2, Td2 <Td0 ≦ Td1, or Td0> Td1, and if Td0 ≦ Td2, the step is performed. If Td2 <Td0 ≦ Td1, the process proceeds to step 110. If Td0> Td1, the process proceeds to step 120.

  In step 106, it is determined whether the detected value Te0 of the temperature sensor for detecting the temperature of the HV motor is Te0 ≦ Te2, Te2 <Te0 ≦ Te1, or Te0> Te1, and if Te0 ≦ Te2. If Te2 <Te0 ≦ Te1, the process proceeds to step 110. If Te0> Te1, the process proceeds to step 120.

  In step 107, the motors 27 and 29 are driven synchronously, and the radiator grille 16 is completely closed by the shutter plate 30 as shown in FIG. 2 (C), and the radiator grille 22 and the radiator condenser 24 front face. The outside air W introduced into the air is diffused by the air guide plate 38 not only in the range behind the radiator grill 22 of the radiator / condenser 24 but also in the range behind the shutter plate 30 of the radiator / condenser 24.

  On the other hand, in step 110, the motors 27 and 29 are driven to reduce the opening area of the radiator grille 16 as shown in FIG. 2B, and the lower end of the vehicle of the radiator grille 16 is closed by the shutter plate 30. The uppermost air guide plate 38 guides the outside air W from between the body general surface 19 and the uppermost air guide plate 38 to the rear of the shutter plate 30 in the vehicle.

  Here, as the opening area of the radiator grille 16 decreases, the inclination of the air guide plate 38 toward the shutter plate 30 side increases, and the shutter of the flow of the outside air W introduced from the radiator grill 22 to the radiator condenser 24. The inclination toward the plate 30 increases. Thus, when the opening area of the radiator grille 16 is adjusted by the shutter plate 30, a necessary amount of outside air W corresponding to the area of the range that overlaps the shutter plate 30 of the radiator / condenser 24 in the vehicle front-rear direction is removed. It can be introduced to the rear of 30 vehicles.

  Further, as the opening area of the radiator grille 16 decreases, the inclination of the air guide plate 38 toward the shutter plate 30 side increases in order from the air guide plate 38 on the shutter plate 30 side, and from the radiator grill 22 to the radiator condenser. The inclination of the flow of the outside air W introduced to 24 toward the shutter plate 30 side increases sequentially from the shutter plate 30 side. As a result, the outside air W can be introduced in a well-balanced manner between the range behind the shutter plate 30 of the radiator / condenser 24 and the range behind the radiator grille 22 of the radiator / condenser 24.

  In step 120, the motors 27 and 29 are not driven, and the radiator grill 16 is maintained in the open state by the grill shutter 26, so that the outside air flows from the radiator grilles 16 and 22 to the entire front surface of the radiator condenser 24. W is introduced.

  Next, a bumper shutter 50, which is a modification of the bumper shutter 28, will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the structure similar to the bumper shutter 28, and description is abbreviate | omitted.

  The bumper shutter 50 includes a plurality of (for example, three as shown in FIG. 5) wind guide plates 38 and a shutter drive mechanism 52. The shutter drive mechanism 52 includes a plurality of (for example, three as shown in FIG. 5) gears 54 having the same shape through which the rotation shaft 42 is inserted, a conduction belt 56 meshing with the plurality of gears 54, and a conduction belt 56. A drive gear 58 for driving and a motor 29 for rotating the drive gear 58 are provided.

  The conduction belt 56 is supported so as to be slidable in the vehicle vertical direction, and tooth portions 56A are intermittently formed on one surface. Here, in a state where the plurality of air guide plates 38 are located at the initial position, the tooth portion 56A meshes only with the uppermost gear 54 and the drive gear 58, and the tooth portion 56A does not mesh with the other gear 54, When the conduction belt 56 slides from the initial position to the vehicle lower side by rotation of the drive gear 58 from the initial position in one direction (counterclockwise direction shown in FIG. 5) A, it meshes with the teeth 56A in order from the gear 54 on the vehicle upper side. It has come to go.

  For this reason, when the drive gear 58 rotates in one direction A from the initial position and the conduction belt 56 slides downward from the initial position in the vehicle, rotation in the one direction A starts from the gear 54 on the upper side of the vehicle in order. The rotation in one direction A is started in order from the air guide plate 38.

  As a result, as with the bumper shutter 28 described above, as the opening area of the radiator grille 16 decreases, the inclination of the air guide plate 38 toward the shutter 30 increases and is introduced from the radiator grille 22 to the radiator condenser 24. The inclination of the flow of outside air W toward the shutter plate 30 side increases.

  Further, as the opening area of the radiator grille 16 decreases, the inclination of the air guide plate 38 toward the shutter plate 30 side increases in order from the air guide plate 38 on the shutter plate 30 side, and from the radiator grill 22 to the radiator condenser. The inclination of the flow of the outside air W introduced to 24 toward the shutter plate 30 side increases sequentially from the shutter plate 30 side.

  Next, a second embodiment of the present invention will be described. In addition, the same code | symbol is attached | subjected to the structure similar to 1st Embodiment, and description is abbreviate | omitted.

  As shown in FIG. 6, the vehicle cooling device 100 of the present embodiment includes a radiator shutter 60, a bumper shutter 28 (see FIG. 2), and a bumper shutter 62. The radiator shutter 60 includes a rectifying member 64 (first air flow control member), and the bumper shutter 62 includes a rectifying member 66.

  As shown in FIG. 6 (A), the rectifying member 64 is supported by a shutter storage portion 68 disposed on the front side of the front bumper 14 and extends in the vehicle width direction on the vehicle upper side of the shutter storage portion 68. It is a columnar member and has a tapered surface 64A having an upward gradient from the vehicle front side to the rear side. The tapered surface 64A guides the wind toward the radiator grille 16 to the upper side of the engine hood 18 when the vehicle 12 travels at a high speed. This makes it difficult for wind to flow from the radiator grill 16 into the engine room. As shown in FIG. 6B, the tapered surface 64A does not hinder the inflow of wind from the radiator grill 16 into the engine room when the vehicle 12 is stopped and when traveling at a low speed.

  The rectifying member 66 is a triangular prism-like member that is supported by the shutter storage portion 68 and extends in the vehicle width direction on the vehicle lower side of the shutter storage portion 68, and has a tapered surface with a downward slope from the vehicle front side to the rear side. 66A. As shown in FIG. 6A, the tapered surface 66A guides the wind W toward the radiator grill 22 to the lower side of the front bumper 14 when the vehicle 12 travels at a high speed. This makes it difficult for the wind W to flow from the radiator grill 22 into the engine room. Further, as shown in FIG. 6B, the tapered surface 66A does not hinder the inflow of the wind W from the radiator grill 22 into the engine room when the vehicle 12 stops and travels at a low speed.

  Here, as shown in FIG. 6C, the rectifying members 64 and 66 can be stored in the shutter storage portion 68. For this reason, even when the vehicle 12 travels at a high speed, the wind W can be introduced from the radiator grills 16 and 22 into the engine room by storing the rectifying members 64 and 66 in the shutter storage portion 68.

  Next, a vehicle cooling device according to a third embodiment of the present invention will be described. In addition, the same code | symbol is attached | subjected to the structure similar to 1st, 2nd embodiment, and description is abbreviate | omitted.

  As shown in FIG. 7, the vehicle cooling device 200 is disposed at a radiator grill (outside air introduction portion) 102 disposed at the front portion of the vehicle, and at the vehicle rear side of the radiator grill 102 and at the vehicle front side end portion of the engine room. Radiator condenser 104 (heat exchanger), a grill shutter 106 disposed in the center of the vehicle width between the radiator grill 102 and the radiator condenser 104, and between the radiator grill 102 and the radiator condenser 104. And a pair of grill shutters 108 disposed at both ends of the vehicle width.

  The grille shutter 106 includes two shutter plates 110 (first air flow control members) and a shutter drive mechanism 111. Each shutter plate 110 is a rectangular flat plate having flexibility. In addition, the shutter drive mechanism 111 is rotatably provided at the center of the vehicle width between the radiator grille 102 and the radiator condenser 104, and includes two take-up rolls 112 around which the shutter plate 110 is taken up, and each take-up roll. 112, a pair of gears 114 inserted through the pair 112, an idle gear 118 meshed with the pair of gears 114, a drive gear 120 meshed with one of the pair of gears 114, and a motor 27 that rotates the drive gear 120.

  The pair of winding rolls 112 are arranged in the vehicle width direction. The shutter plate 110 is supported by a rail member (not shown) so as to be slidable in the vehicle width direction. For this reason, as shown in FIGS. 7B and 7C, when the drive gear 120 rotates in one direction (clockwise direction shown in FIG. 7) A, it is inserted into the gear 114 meshed with the drive gear 120 ( One winding roll 112 (lower side in FIG. 7) rotates in the other direction (counterclockwise direction shown in FIG. 7) B, and the other winding roll 112 (upper side in FIG. 7) rotates in one direction A. Then, the pair of shutter plates 110 are unwound outward from the vehicle width.

  The grill shutter 108 includes a plurality of (for example, three as shown in FIG. 7) air guide plates 38 and a shutter drive mechanism 40. Each wind guide plate 38 is rotatably supported by a rotating shaft 42 extending in the vehicle vertical direction in the range of the rear side of the vehicle in the vehicle width direction of the radiator grill 102. Further, the plurality of rotating shafts 42 are disposed so as to extend in the vehicle vertical direction and overlap in the vehicle width direction, and are arranged at one end portion (base end portion) in the width direction of each air guide plate 38. It is inserted. The plurality of wind guide plates 38 are stacked in the vehicle width direction, and are arranged so that the other end portion (tip portion) in the width direction faces the vehicle rear direction.

  Further, the shutter drive mechanism 40 is engaged with a plurality of (for example, three as shown in FIG. 7) gears 44 through which the respective rotation shafts 42 are inserted and a plurality of (for example, a pair of gears 44 aligned in the vehicle width direction). , Two idle gears 46 as shown in FIG. 7, a drive gear 48 that meshes with the gear 44 that is disposed on the outermost side of each of the gears 44, and a motor 29 that rotates the drive gear 48. It has.

  The plurality of gears 44 have different radii of rotation and the number of teeth, and the rotation radii and the number of teeth of the gear 44 are reduced in the vehicle width inward direction. Therefore, the rotation of the drive gear 48 is transmitted while being accelerated from the outermost gear 44 to the innermost gear 44.

  Here, as shown in FIG. 7A, the initial positions of the plurality of air guide plates 38 are set so that the plurality of air guide plates 38 are substantially parallel. With the plurality of wind guide plates 38 positioned at the initial position, the front end side of each of the wind guide plates 38 is curved toward the inside of the vehicle width, but the amount of the curve is small and passes through both ends of the radiator grill 102 in the vehicle width direction. The outside air W passes straight between the air guide plates 38 and hits the front surface of the radiator capacitor 104.

  7 (B), when the drive gear 48 rotates in one direction (clockwise direction shown in FIG. 7) C, the plurality of gears 44 move in the other direction (counterclockwise direction shown in FIG. 7) D. The plurality of wind guide plates 38 rotate in the other direction D.

  Here, since the rotation of the drive gear 48 is transmitted while being accelerated from the outermost vehicle width gear 44 to the innermost vehicle width gear 44, the amount of rotation of the air guide plate 38 is determined from the outer width of the vehicle. It grows inward. For this reason, after rotation of the drive gear 48 in one direction C is started, only the air guide plate 38 at the innermost side of the vehicle width rectifies the outside air W, and thereafter, as shown in FIG. The rectification of the outside air W by the second row air guide plates 38 from the vehicle width inside starts.

  That is, after the rotation of the drive gear 44 in one direction C is started, only the outside air W that passes through the vehicle width inside of the air guide plate 38 at the innermost vehicle width is initially shown in FIG. 7B. Is inclined toward the shutter plate 110 and the outside air W passing through the outer side of the air guide plate 38 on the inner side of the vehicle width passes straight between the air guide plates 38 as it is. Thereafter, as shown in FIG. 7C, the outside air W that has passed through the vehicle width inside of the second row of wind guide plates 38 from the vehicle width inside is inclined toward the shutter plate 110, and the second row from the vehicle width inside. The outside air W that has passed outside the vehicle width of the air guide plate 38 passes between the air guide plates 38 in a straight line. Further, the inclination of the flow of the outside air W that has passed through the inner side of the air guide plate 38 on the inner side of the vehicle width to the shutter plate 110 increases.

  Here, the motors 27 and 29 are controlled by a control unit (not shown) so that the drive gears 120 and 48 are synchronously rotated from the initial position shown in FIG. When sliding outward in the width direction is started, rotation of the air guide plate 38 in the other direction D is started.

  As shown in FIG. 7B, the rotation of the drive gear 120 in one direction A causes the shutter plate 110 to slide outward in the vehicle width, and the outside air W from the vehicle width center of the radiator grill 102 to the radiator condenser 104 is reduced. The introduction is shut off, but at the same time, the wind guide plate 38 on the innermost side of the vehicle width is rotated in the other direction D by the rotation of the drive gear 48 in the one direction C. The inclination of the flow of the outside air W introduced to the front surface of the radiator condenser 104 toward the shutter plate 30 is increased. As a result, the outside air W is introduced into the area behind the vehicle of the shutter plate 110 in front of the radiator condenser 104.

  Further, as shown in FIG. 7C, the amount of unwinding of the shutter plate 110 to the outside of the vehicle width is increased by the rotation of the drive gear 120 in one direction A, and the outside air to the center of the radiator / condenser 104 in the vehicle width is increased. When the introduction of W is completely interrupted, the air guide plate 38 on the innermost side of the vehicle width further rotates in the other direction D from the state shown in FIG. The inclination of the flow of outside air W introduced to the front surface of the radiator condenser 104 toward the shutter plate 110 is further increased from the state shown in FIG. As a result, the outside air W is introduced to the center portion in the vehicle width direction of the radiator condenser 104 located behind the shutter plate 110 in the vehicle.

  That is, the center of the vehicle width of the radiator grille 102 is closed by the grille shutter 106, and the outside air W introduced from the outside of the vehicle width of the shutter plate 110 to the front surface of the radiator condenser 104 is It is diffused not only at the vehicle width end portion of 104 but also to the vehicle width center of the radiator condenser 104.

Thus, when the center of the vehicle width of the radiator grille 102 is closed, the area behind the shutter plate 110 in front of the radiator condenser 104 is also cooled. Therefore, variation in the cooling amount for each part of the radiator condenser 102 when the center of the width of the radiator grille 102 is blocked by the shutter plate 110 in order to reduce the air resistance during traveling of the vehicle can be suppressed. It is possible to achieve both an improvement in CO ₂ emission, a reduction in CO ₂ emissions, and a sufficient cooling performance of the radiator condenser 102.

  In the present embodiment, the vehicle width center of the radiator grill 102 is closed while the vehicle is running, and the outside air W is guided from the outside of the radiator grill 102 to the center of the radiator condenser 104. The outside of the vehicle width of the grill 102 may be closed, and the outside air W may be guided from the center of the vehicle width of the radiator grill 102 to the outside of the radiator condenser 104 in the vehicle width.

It is a perspective view showing a vehicle provided with a cooling device for vehicles concerning a 1st embodiment of the present invention. (A)-(C) are sectional drawings which show the cooling device for vehicles which concerns on 1st Embodiment of this invention. It is a flowchart for demonstrating the control method of the cooling device for vehicles which concerns on 1st Embodiment of this invention. It is a flowchart for demonstrating the modification of the control method of the cooling device for vehicles which concerns on 1st Embodiment of this invention. It is sectional drawing which shows the modification of the bumper shutter with which the vehicle cooling device which concerns on 1st Embodiment of this invention was equipped. It is a side view which shows the modification of the grille shutter and bumper shutter with which the vehicle cooling device which concerns on 2nd Embodiment of this invention was equipped. (A)-(C) are sectional drawings which show the cooling device for vehicles which concerns on 3rd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Cooling device for vehicles 12 Vehicle 16 Radiator grill (outside air introduction part)
22 Radiator grill (outside air introduction part)
24 Radiator condenser (heat exchanger)
30 Shutter plate (first air flow control member)
38 Air guide plate (second air flow control member)
64 Rectifying member (first air flow control member)
100 Cooling device for vehicle 102 Radiator grill (outside air introduction part)
104 Radiator condenser (heat exchanger)
110 Shutter plate (first air flow control member)
200 Vehicle Cooling Device

Claims (4)

A heat exchanger mounted on a vehicle and cooled by outside air;
An outside air introduction section that is disposed in front of the heat exchanger and introduces outside air to the heat exchanger;
A first air flow control member that opens and closes at least a part of the outside air introduction section;
A second air flow control member for guiding outside air from the open range of the outside air introduction portion to the vehicle rear of the first air flow control member;
A vehicular cooling device comprising:   As the opening area of the outside air introduction portion decreases, the second air flow control member is located on the first air flow control member side of the flow of outside air introduced from the open range of the outside air introduction portion into the heat exchanger. The vehicular cooling device according to claim 1, wherein the inclination of the vehicle is increased.   As the opening area of the outside air introduction portion decreases, the second air flow control member is located on the first air flow control member side of the flow of outside air introduced from the open range of the outside air introduction portion into the heat exchanger. The vehicular cooling device according to claim 2, wherein an inclination of the vehicle is increased in order from the first air flow control member side.   The first air flow control member and the second air flow control member are controlled based on at least one of an outside air temperature, a cooling load of the heat exchanger, and a vehicle speed. 4. The vehicle cooling device according to any one of 3 above.

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