JP4387820B2 - Vehicle test system - Google Patents

Description

  The present invention relates to a vehicle test system for testing the performance of a vehicle.

  As a vehicle performance test, a wind tunnel test is performed to measure the performance of the vehicle in the presence of air flow. The wind tunnel test is performed, for example, on a test room equipped with a chassis dynamometer equipped with a blower mechanism that circulates the air in the test room in a closed circuit shape, for a vehicle that is running on a chassis dynamometer. This is a test in which the performance of the vehicle in the driving state is measured while supplying an airflow or the like corresponding to an aerodynamic load (running wind) that is received if the vehicle is actually running (for example, Patent Documents). 1).

In the above test, for example, the strength of the air flow is adjusted so as to correspond to the simulated traveling speed of the vehicle. Such adjustment is performed mainly by a blower provided in the blower mechanism, but when performing adjustments that are outside the adjustment range of the blower (for example, when a wind stronger than the wind in the maximum drive state of the blower is sent into the test chamber), the test chamber Adjustment may be performed by changing the opening area of the outlet. For example, when the opening area is reduced, the air flow near the outlet is increased in pressure. Then, such a high-pressure air stream is blown out from the outlet, and a stronger wind can be sent to the vehicle.
JP-A-5-289898

  However, the opening area of the air outlet is changed by installing or removing a restricting member that partially blocks the air flowing through the flow path in the vicinity of the air outlet. When the area is reduced and the air flow is increased), it takes time to attach and detach the regulating member, which may cause a reduction in work efficiency. Further, when a regulating member is provided, there is a risk that turbulent airflow may be generated or the airflow may be lost due to the air flow hitting the regulating member.

  The present invention has been made in view of the above circumstances, and provides a vehicle test system capable of accurately measuring the performance of a vehicle by supplying a desired air flow without causing a reduction in work efficiency. That is one purpose.

  In the following, each means suitable for solving the above-mentioned purpose will be described in terms of items. In addition, the effect etc. peculiar to the means to respond | correspond as needed are added.

Means 1. A vehicle test system having a blower mechanism for supplying wind to a test vehicle,
The air blowing mechanism includes a cylindrical body having a blowout port,
An air blowing means for generating an air flow toward the outlet in the cylindrical body;
The cylindrical body has a substantially plate-shaped movable member extending along the flow path so as to constitute a part of the inner wall of the internal flow path;
Slide means for sliding the downstream end portion located on the downstream side of the flow path of the movable member so that the opening area of the outlet is variable;
The position of the upstream end located on the upstream side of the flow path in the movable member varies according to the slide operation of the downstream end,
A vehicle test system characterized in that the downstream end is slidable along the opening surface of the outlet.

  According to the means 1, the opening area of the outlet can be changed relatively easily by sliding the downstream end of the movable member. Further, since the movable member is provided, the air flow generated by the air blowing means can be guided relatively smoothly to the outlet side.

  Generally, the opening surface of the blowout port is provided so as to be substantially orthogonal to the air flow path direction (in most cases, it extends in the vertical direction). This is because if there is a part where the airflow is blown out early from the outlet and a part where the airflow is blown out late, turbulence will occur near the outlet, or the airflow will be applied to the test object which is the target. This is because there is a possibility that it cannot be supplied sufficiently. Here, if the downstream end of the movable member is slid in a state where the position of the upstream end is fixed, the downstream end is not positioned on the opening surface of the outlet, There is a concern that such problems will occur. In this regard, in this means, the downstream end can be slid along the opening surface of the outlet by changing the position of the upstream end. Therefore, the possibility that turbulent airflow is generated can be prevented as much as possible, and the airflow can be efficiently and reliably sent toward the test body.

  In addition, the position of the upstream end varies depending on the sliding operation of the downstream end. That is, the upstream end is configured to be interlocked with the sliding operation of the downstream end. Therefore, the upstream end can be moved incidentally by simply sliding the downstream end. For this reason, it is not necessary to separately adjust the position of the downstream end, and it is not necessary to provide a slide device for moving the upstream end alone. As a result, it is possible to simplify the adjustment work of the movable member, and it is possible to suppress a complicated configuration, an increase in installation space, and a decrease in work efficiency during loading and installation.

  Note that “substantially plate-like” means that there is no step, and includes a flexible sheet-like material, a highly rigid plate, and the like. In addition, “the cylindrical body may be provided with the air outlet facing the front side of the vehicle”. In that case, the wind corresponding to the traveling wind of the vehicle can be supplied to the front side of the vehicle, and the traveling test of the vehicle can be performed more appropriately. In addition, the “opening surface” is a virtual surface formed so as to connect the ends of the outlet, and means the boundary surface between the flow path in the cylindrical body and the outlet (test room space). To do. Incidentally, “the opening area of the blowout opening” means the area of the portion of the opening surface of the cylindrical body that is allowed to blow airflow. Further, “the cylindrical body is configured to have a substantially square cylindrical section, the movable member extends along the inner surface of the upper wall portion or the lower wall portion of the cylindrical body, and the slide means includes the The downstream end portion of the movable member may be configured to slide up and down ”(the same applies to each means hereinafter).

  Mean 2. The vehicle test system according to claim 1, wherein the upstream end slides substantially along the flow path direction.

  According to the means 2, even if the downstream end is slid so as to reduce the opening area of the outlet, the upstream end is slid so as not to (nearly) narrow the air flow path. . Accordingly, it is possible to reduce the possibility that the air flow may be hindered due to the slide at the upstream end.

  Means 3. The vehicle test system according to claim 1 or 2, wherein the upstream end portion slides while maintaining a substantially abutting state with the inner wall of the cylindrical body.

  According to the means 3, the effect of the means 2 can be further ensured. In particular, it is possible to more reliably reduce the possibility that a gap is generated in the flow path due to the slide at the upstream end, and it is possible to suppress problems such as loss of air flow and generation of turbulence.

Means 4. When the downstream end slides so as to narrow the opening area of the outlet, the upstream end slides downstream of the flow path,
The upstream end is configured to slide to the upstream side of the flow path when the downstream end slides so as to widen the opening area of the outlet. The vehicle test system according to any one of 1 to 3.

  Means 5. 5. The vehicle test system according to any one of means 1 to 4, wherein the movable member has flexibility.

  According to the means 5, since the movable member is flexible, distortion and displacement are allowed to some extent when the position of the downstream end and the upstream end is changed, and the sliding operation can be performed without difficulty. it can. Further, manufacturing errors of the movable member can be absorbed when the movable member is assembled. Therefore, the assembling work of the movable member becomes easy and the productivity can be improved.

Means 6. The movable member is configured to bend in the sliding direction of the downstream end along the flow path direction,
The angle formed with respect to the flow path direction of the flow path side surface in a predetermined section in the flow path direction including at least the downstream end is downstream of the flow path regardless of the slide position of the downstream end. 6. The vehicle test system according to any one of means 1 to 5, wherein the vehicle test system is arranged so as to become gradually gentle toward the side.

  According to the means 6, regardless of the slide position of the downstream end, the air flow can be blown out from the opening of the blowout port relatively smoothly while suppressing the risk of airflow loss or turbulence. . The “flow channel direction” mainly means the direction of the center line of the flow channel. The “predetermined section in the flow path direction including the downstream end” is, for example, “downstream from the substantially central portion of the movable member in the flow channel direction, or downstream from the substantially central portion. It also includes the meaning of “a portion including a side end”. In addition, the “movable member may be curved in an S shape in the sliding direction along the flow path direction”. In that case, the above-described effect is exhibited, and an angle formed with respect to the flow channel direction on the flow channel side surface in a predetermined section in the flow channel direction including at least the upstream end is on the upstream side of the flow channel. By being arranged so as to gradually become downward, the air flow can be increased in pressure relatively smoothly.

  Mean 7 The vehicle test system according to any one of means 1 to 6, wherein the slide means is configured to be capable of adjusting a slide amount of the downstream end portion.

  According to the means 7, the opening area of the outlet can be adjusted. As a result, the performance of the vehicle can be measured more accurately and more quickly without causing a reduction in work efficiency. It should be noted that the adjustment of the slide amount at the downstream end by the slide means can be adjusted in multiple steps or can be adjusted continuously. In particular, when the latter configuration is adopted, finer adjustment can be performed as compared with the former configuration.

Means 8. The cylindrical body includes guide means,
The guide means is configured to guide the slide of the upstream end in the flow path direction while restricting the movement of the upstream end in a direction parallel to the slide direction of the downstream end. The vehicle test system according to any one of means 1 to 7, characterized in that:

  According to the means 8, the upstream end can be more reliably slid in the direction along the flow path direction by the guide means. As a configuration of this means, for example, a pair of elongated holes as guide means extending along the flow path direction are formed on the inner wall of the cylindrical body so as to face each other, and the width of the upstream end of the movable member Protruding portions extending in the width direction may be provided at both end portions in the direction, and the upstream end portion may be slid in a state where the protruding portions are inserted into the corresponding elongated holes. Moreover, it is good also as a flange protruding from the inner wall of the said cylindrical body instead of the said long hole. When the former configuration is adopted, the movable member can be configured to be rotatable according to the slide with the upstream end as an axis, and the movable member maintains a reasonable shape when sliding. can do. In accordance with the above-described configuration, for example, the movable member is provided with an extending portion extending in the width direction at both ends in the width direction of the downstream end, and the cylindrical body. Has a pair of slits extending along the sliding direction of the downstream end portion on the inner wall so as to face each other, and the extension portion is inserted into the corresponding slit, and the downstream side The end may be configured to be slidable.

Means 9. The cylindrical body is configured in a substantially square cylindrical section,
9. The vehicle test system according to claim 1, wherein the movable member is configured to slide while substantially contacting an inner wall of the cylindrical body parallel to the sliding direction of the downstream end portion. .

  According to the means 9, it is possible to suppress the formation of a gap in the flow path and reduce the leakage of the air flow. In addition, airflow design, simulation, and the like can be performed relatively easily.

  Means 10. The vehicle test system according to any one of claims 1 to 9, further comprising closing means for substantially closing a gap between an inner wall of the cylindrical body and the upstream end.

  According to the means 10, it is possible to suppress the formation of a gap in the flow path and reduce the leakage of the air flow. In particular, “the closing means may move while maintaining the closed state according to the operation of the upstream end”. The above-described configuration includes a configuration in which the closing means is provided at the upstream end portion, and is moved according to the movement operation of the upstream end portion. In this case, the closed state by the closing means can be maintained regardless of the slide position of the downstream end.

  Means 11. The vehicle test system according to any one of means 1 to 10, wherein the movable member is configured to be deformed in accordance with a sliding operation of the downstream end portion.

  According to the means 11, the flow path can be maintained so as to smoothly guide the air flow to the opening of the outlet even in the sliding state of the downstream end portion.

  Hereinafter, an embodiment of a vehicle test system will be described with reference to the drawings.

  FIG. 1 is a schematic diagram showing a configuration of a vehicle test system. As shown in the figure, a chassis dynamometer 2 on which a vehicle M as a test body is placed is installed on the floor surface of the test chamber 1.

  The test chamber 1 is connected to a blower mechanism 3 for circulating the air in the test chamber 1 in a closed circuit shape. The blower mechanism 3 includes a duct 4 that forms a flow path, and a blower 5 that is provided in the duct 4 and generates an air flow in the duct 4. Further, the air blowing mechanism 3 is provided with a nozzle 6 having a blowout port 7 so as to be connected to one end of the duct 4. The blower mechanism 3 blows wind from the outlet 7 toward the front side of the automobile M that is placed on the chassis dynamometer 2, and blows the air in the test chamber 1 from the rear side of the automobile M. It is configured to inhale. In the present embodiment, the flow path direction in the nozzle 6 is substantially horizontal, and the opening surface of the outlet 7 extends in the vertical direction. In the present embodiment, the nozzle 6 corresponds to a cylindrical body.

  In addition, a cooler 10 that cools air (air) sent from the blower 5, a heater 11 that warms up, and a humidifier 12 are provided in the duct 4, and the temperature of the air sent into the test chamber 1 is provided. And the humidity is adjusted. The duct 4 is provided with a damper 13 that can open and close the flow path of the duct 4 on the downstream side of the humidifier 12. A bypass duct 14 that connects the duct 4 and the upper portion of the test chamber 1 is provided on the upstream side of the damper 13. With such a bypass duct 14, air in the test chamber 1 is circulated through the bypass duct 14 even when the damper 13 is closed, so that a rapid temperature change in the test chamber 1 is alleviated. . In addition to the chassis dynamometer 2, the test chamber 1 includes a simulation device that creates a simulated state (for example, a solar radiation device that supplies heat equivalent to sunlight to the vehicle M), and various performances of the vehicle M. Various measuring instruments and the like for measuring are installed (not shown). Further, each bent portion of the duct 4 is provided with a corner ben (not shown) for smoothly guiding the air flow forward.

  As described above, the air blowing mechanism 3 includes the nozzle 6. Hereinafter, the configuration of the nozzle 6 will be described with reference to the drawings. FIG. 2 is a cross-sectional view showing the configuration of the nozzle 6, and FIG. 3 is a front view showing the nozzle 6 viewed from the test chamber 1 side. The hatched portion in FIG. 3 indicates the opening of the outlet 7.

  As shown in FIGS. 2 and 3, the nozzle 6 includes an outer cylinder 21 having a substantially square cross section. Specifically, the upper wall portion 22 and the lower wall portion 23 of the outer cylinder 21 are designed to reduce the distance from the connection side with the duct 4 toward the downstream side of the flow path, and from a substantially intermediate point. It gradually becomes parallel. Further, the left and right wall portions 24 and 25 of the outer cylinder 21 are provided in parallel to each other in the entire flow path direction. In the present embodiment, the left and right wall portions 24 and 25 extend in a substantially vertical direction.

  Further, the left and right wall portions 24 and 25 are respectively provided with elongated holes 26 as guide means extending along the inner surface of the upper wall portion 22 in the vicinity of the upper end of the inner surface and the connection side end portion with the duct 4. They are formed so as to face each other. The elongate hole 26 has a vertical width substantially equal to a vertical width of a horizontal bar 35 to be described later, and the left and right end portions of the horizontal bar 35 can be inserted respectively. With these configurations, the horizontal bar 35 can slide along the long hole 26.

  In addition, slits 28 extending in the vertical direction are formed in the left and right wall portions 24 and 25 so as to face each other at the downstream end portions of the flow channel. The slits 28 extend downward from the upper ends of the left and right wall portions 24 and 25 by a length that is approximately a quarter of the vertical width of the opening surface of the outlet 7. Further, an insertion hole 29 is formed in the upper wall portion 22 so as to communicate with the slits 28 of the left and right wall portions 24 and 25. Further, a lifting device 31 as a pair of left and right sliding means connected to each other by a power shaft 30 (see FIG. 3) is provided on the upper surface of the upper wall portion 22 so as to correspond to the insertion holes 29.

  The elevating device 31 includes an elevating bar 32 extending from the insertion hole 29 so as to be inserted into the slit 28 so that the elevating device 31 can be raised and lowered, and a handle that can be rotated. The handle is connected to the lifting / lowering rod 32 via a gear or the like (not shown), and the rotational power generated by the turning operation of the handle is changed to a driving force in the vertical direction that moves the lifting / lowering rod 32 up and down. Yes. With this configuration, by rotating the handle, the lifting / lowering rod 32 is continuously raised and lowered according to the amount of rotation of the handle.

  A connecting rod 33 is provided so as to connect the lower ends of the pair of lifting rods 32. Specifically, holes are formed in the lower end portion of the elevating rod 32, and the left and right end portions of the connecting rod 33 are inserted into the corresponding hole portions, respectively. The connecting rod 33 has a circular cross section, and can rotate relative to the hole in accordance with the sliding operation of the downstream end portion of the movable wing 34 described later.

  Furthermore, a movable blade 34 as a substantially plate-shaped movable member is provided so as to extend from the coupling rod 33 to the coupling side end of the nozzle 6. The movable wing 34 in the present embodiment gradually narrows the channel toward the downstream side of the channel. More specifically, the angle formed by the surface of the movable wing 34 with respect to the flow path direction gradually becomes steep from the upstream end of the movable wing 34 to the substantially intermediate point, and from the substantially intermediate point to the downstream end, The angle gradually decreases toward the downstream side. That is, the movable wing 34 has a curved shape in which the longitudinal cross section in the flow path direction is substantially S-shaped as a whole.

  Further, a horizontal bar 35 extending in the left-right direction is provided at the upstream end of the movable blade 34 (the connection end of the nozzle 6). The horizontal bar 35 is inserted into the elongated hole 26 at both left and right ends thereof. The horizontal bar 35 is slidable while being in contact with the upper wall portion 22 so as to be guided by the elongated hole 26. The horizontal bar 35 has a circular cross section, and can rotate relative to the elongated hole 26 in accordance with the sliding operation of the upstream end (horizontal bar 35) of the movable wing 34. Note that the movable wing 34 substantially contacts the left and right wall portions 24 and 25. The movable wing 34 is made of a relatively thin metal plate and is configured to be flexible even in a room temperature environment. The movable wing 34 can be deformed to some extent depending on each sliding situation due to such flexibility.

  The operation of the movable wing 34 will now be described with reference to the drawings.

  The downstream end of the movable wing 34 shown by the solid line in FIG. 2 is at the highest height position in the slidable range, and at this time, the area of the outlet 7 is the largest. In order to strengthen the air flow blown into the test chamber 1 from this state, as shown by a two-dot chain line in FIG. Lower the height position of the side end (downstream end). That is, the flow path of the air flow formed by the lower wall portion 23, the left and right wall portions 24 and 25, and the movable wing 34 is narrowed. The air flow by the blower 5 is increased in pressure by being guided by the narrowed flow path. The high-pressure air flow is blown into the test chamber 1 from the opening of the blow-out port 7 while increasing the speed. That is, the air flow blown into the test chamber 1 is strengthened. At this time, the height position of the downstream end portion of the movable wing 34 is lowered, whereby the upstream side of the flow path of the movable wing 34 is pulled incidentally. Due to this tensile force, a force in the upstream direction acts on the upstream end of the flow path of the movable wing 34, and thereby the upstream end of the flow path of the movable wing 34, that is, the horizontal bar 35 is elongated. While being guided by H. 26, it is slid forward (downstream side of the flow path) while maintaining a substantially contact state with the inner surfaces of the upper wall portion 22 and the left and right wall portions 24, 25.

  On the other hand, when moving the movable wing 34 from the state shown by the two-dot chain line in FIG. 2 to the state shown by the solid line in FIG. In this case, contrary to the above, a pressing force to the upstream side of the flow path is applied to the movable blade 34. With this force, the upstream end (horizontal bar 35) of the movable wing 34 is slid to the back side (upstream side of the flow path) while being guided by the long hole 26.

  As described in detail above, in the present embodiment, the opening area of the outlet 7 can be changed relatively easily by sliding the downstream end of the movable wing 34. Moreover, by providing the movable wing 34, the air flow generated by the blower 5 can be guided relatively smoothly to the outlet 7 side.

  In the present embodiment, the flow direction of the air flow is substantially horizontal, and the opening surface of the outlet 7 extends in the vertical direction. That is, the opening surface of the outlet 7 is substantially orthogonal to the air flow direction. This is because if there is a part where the airflow is blown out early from the outlet and a part where the airflow is blown out late, turbulence is generated in the vicinity of the outlet 7 (outlet destination) or the airflow is shifted by the target. This is because there is a possibility that it cannot be sufficiently supplied to the automobile M as a test body. Therefore, if the position of the upstream end of the flow path of the movable wing 34 is fixed and the downstream end cannot be slid along the opening surface of the outlet 7, In addition, since the downstream end of the movable wing 34 is not located, there is a concern that the turbulence as described above is generated in the vicinity of the outlet 7. In this regard, in the present embodiment, the position of the upstream end of the movable wing 34 varies, so that the downstream end can be slid along the opening surface of the outlet 7. Therefore, the angle formed with respect to the flow direction of the opening surface before and after the slide does not change. As a result, it is possible to prevent the possibility that turbulence is generated due to the change of the opening surface as much as possible, and the airflow can be efficiently and reliably sent toward the automobile M.

  Further, the position of the upstream end of the movable wing 34 varies according to the sliding operation of the downstream end. That is, the upstream end of the movable wing 34 is configured to be interlocked with the sliding operation of the downstream end. Accordingly, the upstream end can be incidentally moved by simply sliding the downstream end of the movable wing 34. Therefore, it is not necessary to separately adjust the position of the downstream end, and it is not necessary to provide a slide device such as the lifting device 31 in order to move the upstream end alone. As a result, it is possible to simplify the adjustment work of the movable wing 34, and to suppress the complexity of the configuration, the increase in installation space, and the decrease in work efficiency during loading and installation.

  Further, the upstream end portion of the movable wing 34 slides so as to be guided by the elongated hole 26 extending along the inner surface of the upper wall portion 22. Therefore, even if the downstream end of the movable wing 34 slides so as to reduce the opening area of the outlet 7, the upstream end slides so as to hardly narrow the flow path. If the upstream end of the movable wing 34 is configured to slide substantially parallel to the sliding direction of the downstream end, more air flow may collide with the upstream end of the movable wing 34, There may be a large gap in the road. In this respect, in the present embodiment, it is possible to reduce the possibility that the air flow is further hindered or the turbulence is further generated due to the slide of the upstream end portion of the movable wing 34.

  In addition, the movable wing 34 slides while maintaining contact with the upper wall portion 22, the left wall portion 24, and the right wall portion 25 (the upstream side with respect to the upper wall portion 22). The end is in contact). Therefore, it is possible to suppress the formation of a gap in the flow path, and to reduce airflow leakage.

  In addition, since the movable wing 34 has flexibility, distortion and displacement are allowed when the position of the downstream end and the upstream end of the movable wing 34 is changed, and the sliding motion of the movable wing 34 is performed without difficulty. Can be made. Further, when the movable feather 34 is assembled, a manufacturing error of the movable feather 34 can be absorbed. Therefore, the assembling work of the movable feather 34 becomes easy, and the productivity can be improved.

  Furthermore, the angle formed by the surface of the movable wing 34 with respect to the flow path direction gradually becomes gradually from the substantially intermediate point of the movable wing 34 toward the downstream end. Therefore, the air flow can be blown out from the opening of the blowout port 7 relatively smoothly while suppressing the risk of airflow loss and turbulent airflow. In addition, from the upstream end of the movable wing 34 to the intermediate point, the angle of the movable wing 34 with respect to the flow path direction gradually becomes steeper toward the downstream side. That is, the angle formed by the surface of the movable wing 34 with respect to the flow path direction becomes gradually gentler from the intermediate point of the movable wing 34 toward the upstream end. Therefore, the air flow can be increased in pressure relatively smoothly.

  The lifting device 31 can continuously adjust the sliding amount of the downstream end of the movable wing 34 by a handle operation. Therefore, the performance of the automobile M can be measured more accurately and more quickly without causing a reduction in work efficiency.

  In addition, since the movable wing 34 is deformed in accordance with the sliding operation of the downstream end portion of the movable wing 34, the airflow can be opened even in each sliding state of the downstream end portion of the movable wing 34. The flow path can be maintained so as to guide smoothly.

  In addition, it is not limited to the description content of the said embodiment, For example, you may implement as follows.

  (A) In the above-described embodiment, the movable wing 34 has flexibility and the longitudinal cross section in the flow path direction is configured in a substantially S shape. However, the configuration is not particularly limited to this configuration. For example, a flexible sheet-like material or a highly rigid plate may be employed. However, the movable wing 34 has no step, and the downstream end of the portion including the downstream end on the downstream side from the substantially central portion including the downstream end of the movable wing 34 or the downstream side of the substantially central portion. Regardless of the slide position, it is desirable that the angle formed with respect to the flow path direction of the surface of the movable wing 34 gradually decreases toward the downstream side of the flow path.

  (B) In the above embodiment, the movable wing 34 is provided along the inner surface of the upper wall portion 22, but may be provided along the lower wall portion 23 and the left and right wall portions 24, 25. .

  (C) The shape of the nozzle portion 6 (outer cylinder 21) in the above embodiment is not particularly limited, and various shapes can be employed. However, it is desirable to have a shape that tapers toward the downstream side of the flow path. For example, the outer cylinder 21 may be configured in a funnel shape that tapers toward the downstream side of the flow path. In the case of adopting such a configuration, the air flow by the blower 5 can be increased in pressure, so that the driving force of the blower 5 can be reduced, or the enhancement or enlargement of the blower 5 can be suppressed. The operation cost can be reduced and the space can be saved.

  (D) In the said embodiment, it is good also as providing the obstruction | occlusion member as an obstruction | occlusion means which obstruct | occludes the clearance gap between the upper wall part 22 and the upstream edge part of the movable wing | blade 34 substantially. As a specific example, a tongue piece as a closing means that protrudes toward the upper wall portion 22 is provided at the upstream end portion of the movable wing 34, and when the downstream end portion of the movable wing 34 slides, the tongue You may comprise so that an upstream side edge part may slide, maintaining a piece and the said upper wall part 22 and a contact state. In that case, it is possible to suppress the formation of a gap in the flow path, and to further reduce airflow leakage. Furthermore, regardless of the slide position of the downstream end of the movable wing 34, the closed state by the tongue piece can be maintained. The tongue piece may have flexibility. In that case, since the tongue piece can be deformed corresponding to the inner surface shape of the upper wall portion 22, the closed state can be maintained more.

  Further, when the above configuration is employed, the upstream end of the movable wing 34 slides substantially along the flow path direction even if the upstream end of the movable wing 34 does not contact the upper wall portion 22. What is necessary is just to be comprised.

  (E) In the above-described embodiment, the slide amount at the downstream end of the movable wing 34 is configured to be continuously adjustable. However, the slide amount can be adjusted in multiple steps. Various configurations can also be adopted for the configuration of the lifting device 31 that lifts and lowers the downstream end of the movable wing 34.

  (F) The structure for attaching the movable wing 34 to the outer cylinder 21 is not particularly limited. For example, in the above-described embodiment, the horizontal bar 35 is provided at the upstream end, but at both ends in the longitudinal direction (left-right direction) of the upstream end, protrusions extending in the width direction are provided. It is also possible to configure such that the upstream end can slide in a state where the protrusions are inserted into the corresponding long holes 26, respectively. Further, as the guide means, flanges protruding from the inner walls of the left and right wall portions 24 and 25 may be employed instead of the long hole 26.

  (G) In the above-described embodiment, the upstream end (horizontal bar 35) and the downstream end (connecting bar 33) of the movable feather 34 are arranged outside so as to smoothly slide the movable feather 34. Although provided so as to be rotatable with respect to the cylinder 21, it is not particularly limited to such a configuration. For example, the connecting rod 33 and the elevating rod 32 are fixedly connected, and instead of the long hole 26, a flow that includes the left and right end portions of the upstream end portion on the flange protruding from the inner walls of the left and right wall portions 24 and 25. The movable wing 34 can be configured so as to be bent while the movable wing 34 is placed in a predetermined section in the road direction. In that case, a configuration for rotating the upstream end and the downstream end of the movable wing 34 respectively (at the upstream end of the movable wing 34, the horizontal rod 35 and the long hole 26, and at the downstream end, The movable wing 34 can be slid without providing the connecting rod 33 and the hole), and the configuration can be simplified. Moreover, you may comprise either the upstream edge part of the movable wing | blade 34, or a downstream edge part so that rotation is possible. However, since the movable wing 34 guides an air flow to the opening of the outlet 7, it is desirable that the movable wing 34 has a certain degree of strength.

It is a schematic diagram which shows the structure of a vehicle test system. It is sectional drawing which shows the structure of a nozzle part. It is a front view which shows the structure of a nozzle part.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Test chamber, 3 ... Blower mechanism, 4 ... Duct, 5 ... Blower, 6 ... Nozzle which comprises a cylindrical body, 7 ... Outlet, 26 ... Elongate hole as a guide means, 28 ... Slit, 31 ... Slide means Lifting device as 34, movable wing as a movable member.

Claims (5)

A vehicle test system having a blower mechanism for supplying wind to a test vehicle,
The air blowing mechanism includes a cylindrical body having a blowout port,
An air blowing means for generating an air flow toward the outlet in the cylindrical body;
The cylindrical body has a substantially plate-shaped movable member extending along the flow path so as to constitute a part of the inner wall of the internal flow path;
Slide means for sliding the downstream end portion located on the downstream side of the flow path of the movable member so that the opening area of the outlet is variable,
Of the movable member, the position of the upstream end located on the upstream side of the flow path slides substantially along the flow path direction according to the sliding operation of the downstream end,
A vehicle test system characterized in that the downstream end is slidable along the opening surface of the outlet. The vehicle test system according to claim 1, wherein the upstream end slides while maintaining a substantially abutting state with an inner wall of the cylindrical body. When the downstream end slides so as to narrow the opening area of the outlet, the upstream end slides downstream of the flow path,
The upstream end is configured to slide to the upstream side of the flow path when the downstream end is slid so as to widen the opening area of the outlet. Item 3. The vehicle test system according to Item 1 or 2 . Said movable member, the vehicle testing system according to any one of claims 1 to 3, characterized in that it has flexibility. The movable member is configured to bend in the sliding direction of the downstream end along the flow path direction,
The angle formed with respect to the flow path direction of the flow path side surface in a predetermined section in the flow path direction including at least the downstream end is downstream of the flow path regardless of the slide position of the downstream end. The vehicle test system according to any one of claims 1 to 4 , wherein the vehicle test system is disposed so as to gradually become gentle toward the side.

Images