JP4573018B2 - Vehicle wet road running environment reproduction method and apparatus - Google Patents

Description

  The present invention relates to a vehicle wet road traveling environment reproduction method and apparatus used for reproducing a wet state of a vehicle traveling on a wet road.

  Automakers generally evaluate vehicle performance at the product development stage to determine design requirements that guarantee performance for a wide variety of vehicle usage environments on the market. As an example of the vehicle usage environment that is an object of such vehicle performance evaluation, there is water splashing that occurs when traveling on a wet road. As an example of an apparatus for grasping the state of water splash, there is a test apparatus shown in Patent Document 1.

  In the test apparatus shown in Patent Document 1, a test vehicle is arranged on a rotating roller of a chassis dynamometer installed under the floor of a wind tunnel, and an air flow is blown to the vehicle at a speed equivalent to the traveling speed of the vehicle and the test vehicle. Front tires that supply water by controlling the number of rotations of the pump in accordance with the peripheral speed in the direction of rotation of the rotating roller from the water flow nozzle installed on the wind tunnel floor at the top of the front wheel side of the rotating roller that drives the tire I try to simulate the water splash situation.

By the way, the test apparatus has the following problems (1) to (4).
(1) A wind tunnel and a chassis dynamometer are required, and the equipment cost is high.
(2) Since the water splash does not occur unless the tire is rotated, it is necessary to actually rotate the tire in order to obtain the water splash situation, and the verification of the parts provided in the vehicle cannot be performed. Grasping the jumping situation is restricted.
(3) Since the number of rotations of the pump that supplies water to the surface of the rotating roller is controlled in accordance with the peripheral speed of the rotating roller, the test content may be far from the actual wet road running state. Obtained. That is, in actual wet road traveling, there is no situation where the depth of the water pool changes with the vehicle speed, but the above-described control is performed (the rotation speed is controlled by controlling the rotation speed of the pump in accordance with the peripheral speed of the rotating roller). Since water is supplied to the surface of the roller), the water depth condition is uniquely determined by the vehicle speed condition, and the water depth condition changes with the change of the vehicle speed condition, so that the actual running state is not exhibited.
(4) Since the traveling state is reproduced on a rotating roller whose center position is fixed, the movement locus 2 of the center of the tire 1 is relative to the road surface 4 before entering the water pool 3 as shown in FIG. Has no inclination. For this reason, although the water splash after entering the water pool 3 can be reproduced, the movement locus 2A of the center of the tire 1 in actual traveling as shown in FIG. 20 has an inclination with respect to the road surface before entering the water pool 3. The state cannot be simulated, and the water splash state at the time of entering the puddle cannot be reproduced.

Further, in order to grasp the above-described water splash situation, a test course simulating a market environment may be used, and a test may be performed by running a vehicle on the test course.
Japanese Patent Laid-Open No. 10-197411

However, since the test data obtained by the test using the test course described above includes variations such as the condition of the test course and the driving operation of the driver, the test is repeatedly performed until the design requirements are determined. .
Moreover, in the test using the test course, the test could not be performed unless various conditions such as the weather conditions were satisfied, and the initial test plan could be forced to change due to bad weather. In addition, because the test plan using the test course requires a lot of labor, the above situation (repeated tests performed until the design requirements are determined) has led to a reduction in product development and an increase in development costs. The fact was that there was a need.

  The present invention has been made in view of the above circumstances, and provides a vehicle wet road traveling environment reproduction method and apparatus capable of easily reproducing a water splash state substantially equivalent to that in actual traveling. Objective.

The invention of a vehicle wet road traveling environment reproduction device according to claim 1 includes a nozzle for injecting water to a test sample, a nozzle driving means for adjusting an angle and / or displacement of the nozzle, and the nozzle. A spray pattern adjusting means for adjusting a spray pattern of water flow from the nozzle, a water amount adjusting means for adjusting the amount of water jetted from the nozzle, a storage means for storing a predetermined water jet condition; And a control means for controlling the nozzle driving means, the spray pattern adjusting means, and the water amount adjusting means based on water injection conditions.
According to a second aspect of the present invention, in the vehicle wet road traveling environment reproduction device according to the first aspect, the EUT is placed on a vertically movable base.

A third aspect of the present invention is the vehicle wet road traveling environment reproduction device according to the first or second aspect, wherein the water injection condition includes a water flow amount, a spray angle, a spray pattern, and a spray time of the water flow with respect to the sample. It is characterized by including.
According to a fourth aspect of the present invention, in the vehicle wet road traveling environment reproduction device according to any one of the first to third aspects, the water injection condition is determined based on a water splash state during actual traveling of the vehicle. It is characterized by that.

The invention of the vehicle wet road running environment reproduction method according to claim 5 is based on a predetermined water injection condition and adjusts the angle and / or displacement of the nozzle, adjusts the amount of water injected from the nozzle, comprising an adjusting step for adjusting the spray pattern of water flow, the injection step of injecting a water flow specimen from the nozzle on the basis of the performed adjustment results in the adjustment step, the pre bellflower as Sample the lifting It is placed on a free base and prior to the adjustment step, the base is adjusted to determine the position of the specimen.

A sixth aspect of the present invention is the vehicle wet road traveling environment reproduction method according to the fifth aspect , wherein the water injection condition includes a water flow amount, a spray angle, a spray pattern, and a spray time of a water flow with respect to the specimen. It is characterized by that.
The invention according to claim 7 is the vehicle wet road traveling environment reproduction method according to claim 5 or 6 , wherein the water injection condition is determined based on a water splash state during actual traveling of the vehicle. To do.

According to the invention described in any one of claims 1 to 7 , the nozzle driving means, the spray pattern adjusting means and the water amount adjusting means are controlled based on the predetermined water jet condition, and water is supplied from the nozzle to the specimen. Is sprayed, the water splash trajectory corresponding to the water injection condition is reproduced in the sample. For this reason, it is possible to evaluate the performance required when driving on wet roads such as waterproof performance and rust prevention performance without running on the test course, and thus determine the vehicle design requirements, which can occur in water splash reproduction tests by running the test course Multiple test repetitions can be avoided, which in turn can speed up product development. In addition, since the water splash situation can be reproduced without being affected by the weather, the initial test plan is not changed due to bad weather.

Hereinafter, a vehicle wet road traveling environment reproduction device according to a first embodiment of the present invention will be described with reference to FIGS.
In FIG. 1A, FIG. 2 and FIG. 3, the vehicle wet road running environment reproduction device 10 is a plate-like 2 that can be moved up and down on four columnar stands 14 arranged on a floor 13 in a test area 12 of a factory 11. The base 15 is provided, and a vehicle (hereinafter referred to as a “test vehicle”) 16 as a test product can be placed on the base 15, and a single component restraint treatment disposed on the floor 13 in the test area 12. A single part (an exhaust pipe is taken as an example in the present embodiment, and hereinafter referred to as an exhaust pipe) that is an example of a test sample can be held in the tool 18. The vehicle wet road traveling environment reproduction device 10 reproduces water splashing on the test vehicle 16 placed on the base 15 and the exhaust pipe 17 held by the single component restraint jig 18 (the vehicle wet road traveling environment is changed). Reproducible). The base 15 and the single component restraint jig 18 are selectively used to selectively reproduce water splashing on the test vehicle 16 and the exhaust pipe 17 (reproduction of a vehicle wet road traveling environment). Further, as described above, the exhaust pipe 17 is held by the single component restraint jig 18 so that the mounting state equivalent to that mounted on the actual vehicle can be reproduced with respect to the exhaust pipe 17.

  The test vehicle 16 is placed on the two bases 15 with the front side facing the left side in FIG. The four mounts 14 are arranged at positions that form a rectangle when they are connected in plan view. Then, with respect to the four mounts 14, the ones on the lower left side, the upper left side, the lower right side, and the upper right side in FIG. The left side, the front right side, the rear left side, and the rear right side mounts 14a, 14b, 14c, and 14d are referred to. The front left and front right bases 14a and 14b are provided with a plate (hereinafter referred to as a front side lift plate) 50a that can be moved up and down. 50b) is provided. Two bases 15 are connected to the front elevating plate 50a and the rear elevating plate 50b, and the two bases 15 are moved up and down as the front elevating plate 50a and the rear elevating plate 50b move up and down.

  A surface plate 52 is arranged in the lower part of the intermediate part of the front part support plate 51a in the floor 13 of the test area 12 and in the vicinity thereof so that the exhaust pipe 17 can be positioned. Further, as shown in FIGS. 3 and 5, the slope 13 of the test area 12 is provided with two slope members 15A corresponding to the two bases 15, and two test vehicles 16 are provided. It is made easy to mount on the base 15 of the.

  As shown in FIGS. 3, 6, 7, and 8, the single-part restraining jig 18 moves up and down on eight struts 55 each having one or two through-holes 54, and on the eight struts 55. And six U-shaped members 56 provided in a possible manner. Of the eight columns 55, four columns 55 are disposed between the front left frame 14a and the rear left frame 14c, and the remaining four columns 55 are disposed between the front right frame 14b and the rear right frame 14d. Hereinafter, the former four are referred to as the left column 55 and the latter four are referred to as the right column 55, as appropriate. The four left support columns 55 and the four right support columns 55 are arranged at the same position in the left-right direction (the vertical direction in FIG. 3).

  Also, three of the six U-shaped members 56 (hereinafter, referred to as the left-side U-shaped member 56 as appropriate) are supported by the left column 55 so as to be vertically movable with their legs inserted through the through holes 54. The remaining three (hereinafter, referred to as right-hand U-shaped member 56 as appropriate) are supported by the right column 55 so as to be vertically movable with their legs inserted through the through holes 54. The front end of the foot of the U-shaped member 56 is inserted into the floor 13 (building foundation).

The single-part restraining jig 18 is further provided with a plurality of detachable pieces (three in this embodiment as examples) that are attached so as to be bridged to the left U-shaped member 56 and the corresponding right U-shaped member 56. The component holding shaft 57 and the three member holding shafts 57 are slidably fitted to the three component holding shafts 57, respectively. A plurality of slide members 58 are provided on each of the three component holding shafts 57 (two in this embodiment is taken as an example).
As shown in FIGS. 9 and 10, a substantially L-shaped hanging tool (hereinafter referred to as “L-shaped hanging tool”) 59 is detachably attached to the slide member 58 and is held by a screw 60. The L-shaped suspension 59 is attached to the other side 61b of the substantially U-shaped suspension (hereinafter referred to as a U-shaped suspension) 61 with a side 61a fixed to the exhaust pipe 17 via a rubber bush 62. ing.

As described above, the test vehicle 16 is placed on the two bases 15 with the front side facing the left side in FIG. 1, and the left and right front tires 22 (front wheels) of the test vehicle 16 on the two bases 15 are mounted. The nozzle device 90 is detachably provided at the ground contact point 23). In the following description of the two nozzle devices 90, the lower one in FIG. 3 is referred to as the left nozzle device 90, and the upper one in FIG.
The nozzle device 90 is supported by the nozzle stand 21, the first and second nozzles 20 a and 20 b for water injection having the diameters A and B (hereinafter, collectively referred to as the nozzle 20 as appropriate). And a nozzle drive mechanism 25 (nozzle drive means) for driving the nozzle 20.

  When the test vehicle 16 is placed on the base 15, the nozzle 20 restrains the single vehicle component against the test vehicle 16 (including the back of the floor 24 of the test vehicle 16). When the exhaust pipe 17 is held by the jig 18, water can be sprayed onto the exhaust pipe 17. The nozzle 20 is provided with a nozzle stand 21 via a nozzle drive mechanism 25 (nozzle drive means). It can be displaced up and down and the angle (horizontal angle and vertical angle) can be adjusted by the operation of the nozzle drive mechanism 25.

  As shown in FIGS. 11 to 14, the nozzle drive mechanism 25 is formed in a columnar shape with a rotating plate 70 that is rotatably supported with respect to the nozzle stand 21, and has a first and second axis with an axis 71 a in between. A revolver 71 that holds the nozzles 20a and 20b facing each other, a revolver support 72 having an L-shaped cross section that rotatably supports the revolver 71 around an axis 71a, and first and second nozzles 20a, The revolver support 72 is rotatably supported in a U-shaped cross section (hereinafter referred to as a U-shaped rotation support) 73 and is attached to the U-shaped rotation support 73 so that the vertical angle of 20b can be adjusted. A vertical shaft 74 and a vertical shaft vertical guide table 75 attached to the rotating plate 70 and guiding the vertical shaft 74 up and down (and thus moving the first and second nozzles 20a and 20b up and down) are provided. As shown in FIG. 16A, the first and second nozzles 20a and 20b are arranged at symmetrical positions with the axis 71a in between, and are arranged at positions that coincide vertically with each other, that is, at a reference position 95 in plan view. In addition, the jet direction of water from the first and second nozzles 20a and 20b coincides with each other in plan view.

  The nozzle drive mechanism 25 further includes a first motor M1 that rotates the revolver support 72 with respect to the U-shaped rotation support 73, and a second motor M2 that moves the vertical shaft 74 up and down with respect to the vertical axis vertical guide base 75. And a third motor M3 for rotating the rotating plate 70 with respect to the nozzle stand 21 and a fourth motor M4 for rotating the revolver 71 with respect to the revolver support 72.

  Further, the vehicle wet road traveling environment reproduction device 10 has an imaging device (hereinafter referred to as a confirmation imaging device) 26 such as a CCD camera, and can image the test vehicle 16 and the exhaust pipe 17. ing. In this case, as described above, the base 15 on which the test vehicle 16 is placed and the U-shaped member 56 of the single component restraint jig 18 that holds (suspends) the exhaust pipe 17 can be raised and lowered. By setting the U-shaped member 56 to a high position, the test vehicle 16 and the exhaust pipe 17 can be easily photographed from below, and the water splash trajectory described later can be favorably photographed. Further, the confirmation imaging device 26 can capture images over a wide range by using a wide-angle lens or the like.

  The nozzle 20 is provided with a nozzle aperture adjusting mechanism 27 (spray pattern adjusting means) so as to adjust the spray pattern of the water flow from the nozzle 20. In addition, as described above, two types of nozzles 20 having different diameters (that is, the first and second nozzles 20a and 20b) are prepared, and are selectively selected according to water injection conditions (high-pressure water injection conditions). It can be used for.

As shown in FIG. 1A, FIG. 2 and FIG. 14, the four nozzles 20 are connected to a high-pressure water injection device 29 via a pipe 80 provided with an electromagnetic valve 28 on the way. The high-pressure water HW can be injected to the back of the floor 24 of the test vehicle 16 by receiving supply of water (high-pressure water) from the high-pressure water injection device 29 through 28.
The high-pressure water injection device 29 includes a water storage tank 30, a pump 31 that discharges water from the water storage tank 30 toward the nozzle 20, and a pump drive motor 32 that drives the pump 31 and constitutes a water amount adjusting means together with the pump 31. Has been. The pump drive motor 32 is configured to be able to adjust the amount of water discharged from the pump 31 and thus the amount of water ejected from the nozzle 20 by controlling the number of rotations by the control device 34.

As shown in FIG. 15, the pipe 80 includes a main pipe 81 connected to the discharge side of the pump 31 and first to fourth branch pipes 82 a to 82 d branched from the main pipe 81. The first and second branch pipes 82a and 82b are referred to as first and second nozzles 20a and 20b (hereinafter referred to as left first and second nozzles 20a and 20b). ) Are connected, and the first and second nozzles 20a and 20b (hereinafter, the right first and second nozzles 20a on the right side) of the right side (upper side in FIG. 3) are connected to the third and fourth branch pipes 82c and 82d. , 20b).
One end of a relief pipe 84 having a normally closed relief valve 83 that opens when the pressure exceeds a predetermined pressure is connected to the main pipe 81 side of the electromagnetic valve 28 in the first to fourth branch pipes 82a to 82d. Yes. The other end of the relief conduit 84 is connected to the water storage tank 30.

  By controlling the opening and closing of the first to fourth electromagnetic valves 28a to 28d, the four first and second nozzles 20a and 20b can be selectively used. In the present embodiment, the water injection timing by the left first nozzle 20a or the left second nozzle 20b and the water injection timing by the right first nozzle 20a or the right second nozzle 20b are in phase. The electromagnetic valve 28 is opened and closed. The present invention is not limited to this, and the electromagnetic valve 28 may be opened and closed so as to have different phases.

  The control device 34 is connected to the nozzle drive mechanism 25 (first to fourth motors M1 to M4), the nozzle throttle mechanism 27, the electromagnetic valve 28, and the pump drive motor 32. The control device 34 includes a storage unit 35 (storage means) that stores predetermined water injection conditions, and each connection member [nozzle drive mechanism 25 (first to fourth motors M1 to M4) based on the water injection conditions. ), A nozzle throttle mechanism 27, an electromagnetic valve 28, and a controller 36 for controlling the pump drive motor 32].

  A keyboard 38 is connected to the controller 36, and information (reproduction information) indicating one setting water splash pattern corresponding to a water splash trajectory to be reproduced among a plurality of setting water splash patterns to be described later can be input. I am doing so. That is, among the water injection conditions stored in the storage unit 35, the water injection condition corresponding to the input signal from the keyboard 38 is selected, and the control signal D is sent from the controller 36 so as to satisfy the selected water injection condition. This control signal D is used to temporally control all parameters (water injection amount, injection angle, spray pattern, injection timing data, and nozzle diameter data) related to water injection conditions such as the water injection amount and injection angle, which will be described later. It has become so.

The water injection conditions include the amount of water jetted into the test vehicle 16, the spray angle, the spray pattern, the spray timing data (the spray interval and the spray duration time, corresponding to the spray time in claims 3 and 7), and the nozzle diameter. Contains data.
The water injection conditions (injection water amount, injection angle, spray pattern, injection timing data, and nozzle diameter data) are determined by the water generated by the front tire 22 when the vehicle travels on a general road or highway in rainy weather (that is, during actual travel). The splash is imaged by an imaging device such as a CCD camera (hereinafter referred to as a setting imaging device), and is determined based on water splash trajectory data obtained by the imaging.

  Water splash trajectory data is a number of patterns determined by road surface conditions (general roads, highways), vehicle speeds (low, medium, high speed), and puddle conditions (presence / absence, depth, interval between puddles on road surface, etc.) (Hereinafter, for convenience, it is called a setting water splash pattern). Note that a plurality of water jetting conditions are also determined in correspondence with a plurality of water splash trajectory data and thus a setting water splash pattern.

  Then, the spray pattern and the angle of the water splash trajectory and thus the spray angle (horizontal angle, vertical angle) are obtained from the water splash trajectory data, and the spray pattern and the jet angle (water jet condition) are stored in the storage unit 35. ing. Further, the injection water amount and the injection timing data (water injection conditions) are obtained by visual calculation of the actual water splash trajectory or the amount of adhesion obtained from the water splash trajectory data, and are stored in the storage unit 35. It has become.

  The controller 36 sends a control signal D to each member [nozzle drive mechanism 25 (first to fourth motors M1 to M4), nozzle throttle mechanism 27, electromagnetic valve 28, and pump drive motor 32] based on an input signal from the keyboard 38. To control each member temporally. FIG. 1B is a diagram schematically showing the control signal, where the horizontal axis indicates time, the vertical axis indicates the amount of water to be injected, the injection angle, the opening / closing contents of the electromagnetic valve 28, the selection contents of the nozzle diameter, and the like. Yes. The control signal D includes the injection water amount information. If the injection water amount information is taken as an example, in FIG. 1B, the horizontal axis is the time including the injection interval d1, the injection duration d2, and the vertical axis is the injection water amount. .

  In the storage unit 35, a plurality of water injection conditions (amount of water to be injected, an injection angle, a spray pattern, injection timing data, and nozzle diameter data) are associated with the plurality of water splash trajectory data (and thus a plurality of setting water splash patterns), respectively. And remembered. Then, by selecting one of the plurality of water splash trajectory data (and thus a plurality of setting water splash patterns), one corresponding water jet among the plurality of water jet conditions stored in the storage unit 35 is selected. Conditions are selected and used to control each member.

The operation of the vehicle wet road traveling environment reproduction device 10 configured as described above will be described below with reference to FIG.
In this vehicle wet road traveling environment reproduction device 10, as shown in FIG. 3, first, the test article is a vehicle (test vehicle 16) or an exhaust pipe 17 instead of the vehicle (test vehicle 16). Is determined (step S1).
If it is determined in step S1 that the sample is a vehicle (sample vehicle 16) (Yes), the sample, that is, the sample vehicle 16 is placed on the base 15 so that the water splash trajectory can be easily measured. The height position of the base 15 is adjusted to determine the position of the specimen (step S2. The step of determining the position of the specimen in claim 5).
Next, the nozzle stand 21 holding the nozzle 20 is installed at the ground contact point 23 of the left and right front tires 22 (step S3).

  Next, the controller 36 reproduces input by the operator among a plurality of water injection conditions (injection conditions of the high-pressure water HW) obtained based on the water splash data obtained by actual traveling and stored in the storage unit 35. One water injection condition (injection water amount, injection angle, spray pattern, injection timing data, and nozzle diameter data) corresponding to the usage information is selected and read (step S4).

In step S5 subsequent to step S4, the nozzle 20 having a diameter corresponding to the water injection condition (nozzle diameter data) read in step S4 is selected, and the electromagnetic valve 28 connected to the selected nozzle 20 corresponds to time. The electromagnetic valve 28 that is not opened and connected to the selected nozzle 20 is closed, and water is jetted from the selected nozzle 20 with time adjustment.
Further, in this step S5, in accordance with the water injection conditions read out in step S4, corresponding members for the rotational speed of the pump drive motor 32, opening and closing of the electromagnetic valve 28, the restriction of the nozzle 20, and the angle and position of the nozzle 20 The control signal D is then output by the control signal D (adjustment step of claim 6), whereby the high-pressure water HW is injected from the nozzle 20 (injection step of claim 5), and the water injection condition (and thus the operator inputs) The water splash trajectory corresponding to the reproduction information) is obtained (step S5).

Next, it is determined whether or not the water splash trajectory in step S5 is performed while satisfying all the injection conditions. If it is determined that all the injection conditions are satisfied, the pump drive motor 32 is stopped and the water from the nozzle 20 is stopped. The injection is terminated (step S6). Subsequently, the water splash situation is imaged using the confirmation imaging device 26 to obtain the water splash situation data for confirmation. Based on the water splash situation data for confirmation, the performance (waterproof performance and rust prevention) of the vehicle on the wet road is obtained. Performance) is confirmed (step S7). An image of the test vehicle 16 is imaged over a wide range by the confirmation imaging device 26, and the confirmation water splash status data includes data of regions other than the region corresponding to the water splash trajectory data obtained by the setting imaging device (hereinafter referred to as the water splash trajectory data). And non-setting area data).
The confirmation water splash status data obtained in step S7 is reflected in the design of the vehicle by the performance evaluation of the vehicle. By including the non-setting area data, the floor 24 of the test vehicle 16 is recorded. It is possible to grasp the situation of water splashing in the part that is difficult to touch the human eye on the back, and improve the design accuracy of the vehicle.

  If it is determined in step S1 that the specimen is the exhaust pipe 17 (No), the base 15 is lowered to the floor 13 side, and the front part support plate 51a and the rear part support plate 51b are attached to the gantry 14. (Step S8) The specimen, that is, the exhaust pipe 17 is held by the single component restraining jig 18 (Step S9). Thereafter, the steps S4 to S7 are executed for the exhaust pipe 17 instead of the test vehicle 16.

  According to the present embodiment, the nozzle 36 (first to fourth motors) is driven by the controller 36 on the basis of predetermined water injection conditions (water injection amount, injection angle, spray pattern, injection timing data, and nozzle diameter data). M1 to M4), the nozzle throttle mechanism 27, the electromagnetic valve 28, and the pump drive motor 32 are controlled to inject high-pressure water from the nozzle 20 to the sample (the test vehicle 16 or the exhaust pipe 17). The water splash trajectory corresponding to the injection conditions is reproduced in the specimen. Then, it is possible to evaluate the performance required when driving on a wet road such as waterproof performance and rust prevention performance without driving the test course, and to determine the vehicle design requirements. This eliminates road surface conditions and driver operation variations, improves the reproducibility of water splash test results, avoids multiple test repetitions that can occur in water splash reproduction tests on test courses, and thus products. Speed up development. In addition, since the water splash situation can be reproduced without being affected by the weather, the initial test plan is not changed due to bad weather.

Further, unlike the conventional technique using a chassis dynamometer in which a water splash situation is reproduced by rotating a tire of a vehicle, a facility for rotating the tire is not necessary, and the facility cost can be reduced.
Moreover, unlike the prior art using the chassis dynamometer, the water splash situation is reproduced without rotating the tire.
Further, since the exhaust pipe 17 is held by the single component restraint jig 18 and can reproduce a mounting state equivalent to that mounted on an actual vehicle, water splashing is performed on the exhaust pipe 17. The situation can be reproduced. For this reason, the vehicle wet road traveling environment reproduction device 10 of the present embodiment can improve versatility as compared with the conventional technique using the chassis dynamometer in which the water splash situation is limited to only the vehicle. .

In addition, since the base 15 having the lifting / lowering function is used, it is possible to easily image the floor. For this reason, it becomes easy to analyze the water splash trajectory (water trajectory) to the under floor parts of the vehicle and the water splash relation between the parts.
Compared to the prior art using a chassis dynamometer, the equipment is simplified and the equipment cost can be reduced because the equipment for rotating the front tire 22 is unnecessary.

  In the above-described embodiment, the vehicle is actually used for the water splash trajectory data for determining the water injection conditions (injection water amount, injection angle, spray pattern, injection timing data, and nozzle diameter data) stored in advance in the storage unit 35. As a result, the water injection condition is determined based on the water splash state during the actual running of the vehicle, but instead of this, the water splash trajectory data is obtained by desktop calculation, The water injection condition may be determined based on desktop calculation.

  Further, in the first embodiment, the case where the first and second nozzles 20a and 20b are attached to the revolver 71 is taken as an example. However, as shown in FIG. A nozzle (hereinafter, referred to as a third nozzle) 20c may be added to form three nozzles (second embodiment). In this case, since there are two revolvers 71 in the entire apparatus, there are a total of six nozzles 20, and correspondingly, as shown in FIG. 17, fifth and sixth branches having electromagnetic valves 28e and 28f are provided. Pipe lines 82e and 82f are further provided, and a relief pipe line 84 provided with a relief valve 83 is provided.

  Note that the first and second nozzles 20a and 20b are arranged at the reference position 95 in plan view as described above, and the water injection direction is selected regardless of which of the first and second nozzles 20a and 20b is selected. Will not deviate horizontally. However, when the third nozzle 20c is provided as shown in FIG. 16A, the third nozzle 20c is offset from the reference position 95 in plan view. In this state, the direction of water injection from the third nozzle 20c is different from that of the first and second nozzles 20a and 20b. When the third nozzle 20c is provided as described above, the fourth motor M4 is driven as shown in FIG. 16B so that water is ejected from the third nozzle 20c at the reference position 95 in plan view. Then, correction control is performed so that the revolver 71 rotates.

  In the first embodiment, since the first and second nozzles 20a and 20b are disposed at the reference position 95 in plan view, the fourth motor M4 need not be operated.

  Although the case where three nozzles 20 are attached to the revolver 71 has been described with reference to FIGS. 16 and 17, four or more nozzles 20 may be attached to the revolver 71. Also in this case, since the offset is offset from the planar view reference position 95, correction control is performed so that the revolver 71 is rotated in the same manner as described above.

  Moreover, in the said embodiment, although the case where the angle adjustment and the up-and-down adjustment of the nozzle 20 were performed was taken as an example, when performing vehicle design, the case where the direction of water splashing etc. falls within a predetermined range is targeted. In that case, instead of the above example, either one of angle adjustment and vertical adjustment of the nozzle 20 may be adjusted.

  In the above embodiment, the case where the nozzle 20 is adjusted up and down is taken as an example, but the nozzle 20 may be configured to be displaced in the left-right direction or the front-rear direction.

BRIEF DESCRIPTION OF THE DRAWINGS The vehicle wet road driving | running | working environment reproduction apparatus which concerns on 1st Embodiment of this invention is shown, (A) is a figure which shows the apparatus typically, (B) is a control signal which the controller of (A) outputs. FIG. It is a figure which shows a mode that high pressure water is discharged from a nozzle by control of the controller of FIG. It is a flowchart for demonstrating an effect | action of the vehicle wet road traveling environment reproduction apparatus of FIG. It is a top view which shows typically the state which mounted the test vehicle on the base. It is a top view which shows typically the state which hold | maintained the single item component to the single item component restraining jig. It is a perspective view which shows the component restraint tool of the single item component restraint jig of FIG. It is sectional drawing which shows typically the support | pillar and U-shaped member of FIG. It is a side view which shows typically the state which hold | maintained the single item component in the single item component restraining jig. It is a side view which shows typically the slide member, hanging tool, and rubber bush of the component restraint tool of FIG. It is a front view which shows typically the slide member, hanging tool, and rubber bush of FIG. It is a perspective view which shows the nozzle apparatus of FIG. It is a top view which shows the nozzle apparatus of FIG. It is a front view which shows the nozzle apparatus of FIG. It is a side view which shows the nozzle apparatus of FIG. It is a circuit diagram which shows the connection state of the pipe line and nozzle of FIG. It is a figure which shows 2nd Embodiment (3 nozzles are attached to a revolver) of this invention, (A) shows the state by which the 3rd nozzle is offset from planar view reference position, (B) FIG. 4 is a diagram showing that the revolver is rotated so that the third nozzle is in a plan view reference position. It is a circuit diagram which shows the connection state of a pipe line and a nozzle in the case of attaching three nozzles to one revolver. It is a flowchart for demonstrating an effect | action of the vehicle wet road traveling environment reproduction apparatus of FIG. It is a figure which shows typically the mode of rushing into the puddle of the tire in a prior art. It is a figure which shows typically the mode of rushing into the water pool of an actual tire.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Vehicle wet road driving | running | working environment reproduction apparatus, 17 ... Exhaust pipe (test sample, single-piece components), 20 ... Nozzle, 25 ... Nozzle drive mechanism (nozzle drive means), 27 ... Nozzle throttling mechanism (spray pattern adjustment means), DESCRIPTION OF SYMBOLS 31 ... Pump (water quantity adjustment means), 32 ... Pump drive motor (water quantity adjustment means), 35 ... Memory | storage part (storage means), 36 ... Controller (control means).

Claims (7)

  Nozzle for jetting water to the specimen, nozzle driving means for adjusting the angle and / or displacement of the nozzle, and spray pattern adjustment for adjusting the spray pattern of water flow from the nozzle provided in the nozzle Means, water pressure adjusting means for adjusting the amount of water jetted from the nozzle, storage means for storing predetermined water jetting conditions, nozzle driving means based on the water jetting conditions, spray pattern adjusting means, A vehicle wet road traveling environment reproduction device, comprising: a control unit that controls the water amount adjusting unit.   The vehicle wet road traveling environment reproduction device according to claim 1, wherein the specimen is placed on a base that can be raised and lowered.   3. The vehicle wet road traveling environment reproduction device according to claim 1, wherein the water injection conditions include a water flow amount, a spray angle, a spray pattern, and a spray time of a water flow with respect to the specimen.   4. The vehicle wet road traveling environment reproduction device according to claim 1, wherein the water injection condition is determined based on a water splash state during actual traveling of the vehicle. 5. An adjustment step for adjusting the angle and / or displacement of the nozzle, adjusting the amount of water jetted from the nozzle and adjusting the spray pattern of the water flow from the nozzle, based on predetermined water jetting conditions;
An injection step of injecting a water flow from the nozzle to the specimen based on the adjustment result performed in the adjustment step,
A vehicle wet road traveling environment reproduction method, wherein the specimen is placed on a base that can be raised and lowered, and the position of the specimen is determined by adjusting the base prior to the adjustment step. 6. The vehicle wet road traveling environment reproduction method according to claim 5 , wherein the water injection conditions include a water flow amount, a spray angle, a spray pattern, and a spray time of a water flow with respect to the specimen. The vehicle wet road traveling environment reproduction method according to claim 5 or 6 , wherein the water injection condition is determined based on a water splash state during actual traveling of the vehicle.

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