JPH09273976A - Air input measuring device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sufficiently catch a transitional air input state for a vehicle at the time when outrunning is performed and being outrun is executed by calculating an aerodynamic characteristic value acting on a vehicle model on the basis of each detection data of a pressure sensor. SOLUTION: Many pressure detection holes 2 are drilled in the surface of a vehicle model for air detection 1 and one end of each communicating pipe 3 is connected from the detection holes 2 to the inside of a model 1. The end part of the communicating pipe of the outside of the vehicle is connected to a pressure sensor 4, which detects air pressure acting on the detection hole 2. An arithmetic means 5 refers to a previously measured azimuth angle and a pressure receiving area on the basis of detection data while it takes in each detection data from the sensor 4 in required cycle to calculate drag, lateral force and yawing moment and aerodynamic characteristics acting on the model 1 is calculated. An auxiliary vehicle model 6 provided sideward of the model 1 is run against simulated running wind, and the aerodynamic characteristics acting on the model 1 during outrunning and beingoutrun experiment mode are calculated 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air input measuring device for a vehicle, which is suitable for measuring a transient air input state to a vehicle when the vehicle is overtaken or overtaken.

[0002]

2. Description of the Related Art In recent years, the opportunities for driving automobiles at high speed have increased due to the spread of highways and the improvement of power performance of automobiles. As the vehicle speed increases, unsteady aerodynamic forces are more likely to affect the running posture of the vehicle, and securing running stability at high speeds is another issue. Such unsteady aerodynamic force is generated when the wind speed and direction of the natural wind changes due to the influence of weather and topography, and when the vehicle passes by other vehicles or when it is overtaken (overtaken). The two are mainly considered.

Of these, the former is called aerodynamic force when a side wind is received, and many studies have been made. On the other hand, the latter, that is, a running car is overtaken by another car. The effects of aerodynamic forces are not well studied. By the way, it is known that when a small car that is running is overtaken by a large car, a phenomenon that the small car is sucked toward the large car (hereinafter referred to as a suction phenomenon) occurs. .

Regarding such a sucking phenomenon, it is necessary to conduct a wind tunnel experiment in order to clarify the movement of the vehicle when the vehicle is overtaken. In this wind tunnel experiment,
Changes in yawing moment, lift, and drag are measured by changing the wind speed, gap, and relative size of the object.
A balance is used to measure each force.

For example, FIG. 19 is a schematic perspective view showing a conventional measuring state of aerodynamic force. As shown in FIG. 19, a model imitating an ordinary vehicle on the overtaking side (small model on the overtaking side). 101 is arranged and provided on a plate 102 that imitates a vertically running traveling road surface. Therefore, this small model 101 on the overtaking side is
It is installed with its top and bottom faces sideways.

Further, in order to create an overtaking state, a model (overtaking side model) 103 imitating an overtaking side vehicle (large vehicle or ordinary vehicle) is replaced with an overtaking side small model 1
It is provided so as to translate laterally of 01, and the overtaking side model 103 is driven by the straight-ahead drive mechanism 104. Reference numeral 104A denotes a straight-ahead guide, and these devices are installed in the wind tunnel so that the wind can be blown from the front of the overtaking side model 103 in the traveling direction.

Further, the overtaking side small model 101 is pivotally supported by a shaft 105 so as to be able to rotate around the upper and lower surfaces thereof, and the front and rear ends thereof are respectively attached to a first lift balance 106 and a second lift balance 107. They are connected by piano wires 108A and 108B. Further, the shaft 105 is connected to a drag balance 110 through a support rod 109. In this way, the lateral force is measured by the first lift balance 106 and the second lift balance 107, and the tensile force is measured by the drag balance 110.

[0008]

By the way, in the case of such conventional means, the response of the balance to the transient measurement of aerodynamic force at the time of overtaking is low, and the overtaking vehicle is driven at an extremely low speed. Need to be measured. Therefore, by such means, there is a problem that the vehicle cannot be accelerated to the required speed for the experiment and the transient phenomenon cannot be sufficiently captured.

The present invention was devised in view of the above-mentioned problems. When the vehicle is sufficiently accelerated, the actual running state of the vehicle can be simulated so that the vehicle can be overtaken or overtaken. It is an object of the present invention to provide an air input measuring device for a vehicle capable of sufficiently capturing a phenomenon of a transient air input state to a vehicle in the above.

[0010]

Therefore, in the vehicle air input measuring device according to the present invention as defined in claim 1, a plurality of pressure detecting holes are formed on the surface of the vehicle model for detecting the air input, and the pressure detecting holes. , A plurality of communication pipes disposed on the inner side of the vehicle model, a pressure sensor connected to an end of the communication pipe to detect air pressure applied to each of the pressure detection holes, and a pressure sensor of the pressure sensor. It is characterized by comprising an arithmetic means for calculating an aerodynamic characteristic value acting on the vehicle model based on each detection data.

According to a second aspect of the present invention, there is provided an air input measuring device for a vehicle according to the first aspect, wherein the air input detecting vehicle model is located laterally relative to the air input detecting vehicle model. It is characterized in that an auxiliary vehicle model is provided which moves and overtakes or is overtaken by the vehicle model for air input detection. A vehicle air input measuring device according to a third aspect of the present invention is the device according to the second aspect, wherein a wind tunnel capable of generating a simulated traveling wind, a road surface model installed in the wind tunnel, and a road surface model on the road surface model. Fixed vehicle model fixed on the first traveling lane model and a traveling vehicle model equipped on the second traveling lane model adjacent to the first traveling lane model on the road surface model and capable of traveling in the traveling lane model direction In addition, the fixed vehicle model is configured as the air input detection vehicle model, the traveling vehicle model is configured as the auxiliary vehicle model, and the traveling vehicle model is generated while generating the simulated traveling wind. An overtaking experiment mode is set in which the fixed vehicle model is overtaken by the traveling vehicle model by driving against the simulated running wind, and the computing means sets the overtaking experiment model. It is characterized by being configured to calculate the aerodynamic characteristic value of the during de execution.

A vehicle air input measuring device according to a fourth aspect of the present invention is the device according to the second aspect, wherein a wind tunnel capable of generating a simulated traveling wind, a road surface model installed in the wind tunnel, and The fixed vehicle model fixed on the first traveling lane model on the road surface model and the second traveling lane model adjacent to the first traveling lane model on the road surface model are equipped and can travel in the traveling lane model direction. A traveling vehicle model, the fixed vehicle model is configured as the air input detection vehicle model, the traveling vehicle model is configured as the auxiliary vehicle model, and the traveling vehicle is generated while generating the simulated traveling wind. An overtaking experiment mode is set in which the model is run in the direction of the simulated running wind and the fixed vehicle model overtakes the running vehicle model.
It is characterized in that the aerodynamic characteristic value is calculated during execution of the overtaking experiment mode.

According to a fifth aspect of the present invention, there is provided the vehicle air input measuring device according to the first aspect, wherein the air input detecting vehicle model is provided laterally to the air input detecting vehicle model. It is characterized in that an auxiliary vehicle model is provided for traveling in the opposite direction and passing each other. A vehicle air input measuring device according to a sixth aspect of the present invention is the device according to the first aspect, wherein the air input detecting vehicle model is configured as a self-propelled model capable of traveling by itself, and the computing means is It is characterized in that it is provided inside the vehicle model for air input detection.

A vehicle air input measuring device according to a seventh aspect of the present invention is the device according to any one of the first to sixth aspects, in which the calculating means detects from each of the pressure sensors at a required cycle. It is characterized in that the aerodynamic characteristic value acting on the vehicle model is calculated while taking in the data. An air input measuring device for a vehicle according to an eighth aspect of the present invention is the device according to the third or fourth aspect, wherein the road surface model is formed as an upper surface on a plate installed substantially horizontally in the wind tunnel. It is characterized in that the windward end portion of is configured to have a streamlined cross section.

According to a ninth aspect of the present invention, there is provided the air input measuring device for a vehicle according to the eighth aspect, wherein the plate can rotate the plate around an axis perpendicular to an upper surface of the plate. It is installed on a turntable so that the simulated traveling wind can be added to the air input detection vehicle model on the plate from diagonally forward, and the windward side part of the plate is It is characterized by having a streamlined cross section.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 to 18 show a vehicle air input measuring device as an embodiment of the present invention.
FIG. 1 is a schematic diagram showing the overall configuration, FIG. 2 is a schematic perspective view showing a model for the measurement, FIG. 3 is a schematic side view showing the drive system, and FIG. 4 is a block for explaining its operation. FIG. 5 is a circuit diagram showing a part of the electrical connection system, FIG.
FIG. 7 is a circuit diagram for explaining the operation, FIG. 8 is a schematic perspective view showing a modification of the measurement model, and FIG. 9 is a schematic plan view for explaining the operation of the modification. 10 is a schematic perspective view showing a mounting state of the deflection wind additional component of the modified example, FIG. 11 is a schematic front view showing the mounting state of the deflection wind additional component, and FIG. FIG. 13 is a schematic plan view showing the mounted state, FIG. 13 is a schematic front view showing the road surface model member and the deflected wind additional component, and FIG. 14 is a schematic view for explaining the shape of the deflected wind additional component.
FIG. 15 and FIG. 16 are schematic diagrams for showing the operation, and FIG.
FIG. 18 is a flow chart for explaining the operation, and FIG. 18 is a schematic diagram showing the adopted state in the actual running test.

In the vehicle air input measuring device S of the present embodiment, as shown in FIGS. 1 to 3, a large number of pressure detection holes 2 are formed on the surface of the air input detecting vehicle model 1, and each pressure is measured. The inside of the vehicle model 1 of the detection hole 2 is connected to one end of the communication pipe 3, respectively. The other ends of these communication pipes 3 are led out to the outside of the vehicle model 1, pressure sensors (pressure measuring devices) 4 are connected to the vehicle outer ends of these communication pipes 3, and each pressure detection hole 2 is connected. Is configured to detect the air pressure applied to.

Further, there is provided a calculating means 5 for calculating an aerodynamic characteristic value acting on the vehicle model 1 based on each detection data of the pressure sensor 4. As shown in FIG. 4, the computing means 5 fetches the detection data from each pressure sensor 4 at a required cycle and, as shown in FIG.
The drag force D, the lateral force S, and the yawing moment YM are calculated with reference to β and the pressure receiving area Si, and the aerodynamic characteristic values Cd, Cs, and Cym acting on the vehicle model 1 are calculated.

An auxiliary vehicle model 6 that moves relative to the air input detecting vehicle model 1 on the side of the air input detecting vehicle model 1 and overtakes or is overtaken by the air input detecting vehicle model 1. Is provided. That is, the road surface model R of the vehicle air input measuring device S is configured to be installed in a wind tunnel that can generate a simulated traveling wind, and on the first travel lane model 26 on the road surface model R, A fixed vehicle model 1 as an air input detection vehicle model is fixed.

A second traveling lane model 27 is provided adjacent to the first traveling lane model 26 on the road surface model R, and a traveling vehicle model as an auxiliary vehicle model is provided on the second traveling lane model 27. 6 is equipped so that it can run in the direction of the driving lane model. The traveling vehicle model 6 is configured to be driven by a motor 13 via a chain 12.

Therefore, by causing the traveling vehicle model 6 to travel against the simulated traveling wind while generating the simulated traveling wind, the overtaking experiment mode in which the fixed vehicle model 1 is overtaken by the traveling vehicle model 6 is set. Is configured to. Then, the aerodynamic characteristic value is calculated by the calculating means 5 during the execution of the overtaking experiment mode realized in this way.

By the way, the road surface model R is formed as the upper surface of the plate 10 installed substantially horizontally in the wind tunnel, and the windward end portion 10A of the plate 10 is shown in FIGS.
As shown in FIG. 3, it is formed to have a streamlined cross section. The streamline shape of this streamlined cross section is CF43 in FIG.
The shape shown in is adopted. Meanwhile, plate 1
The leeward side end portion 10C of 0 is formed in a state where the angular edge remains.

As shown in FIG. 9, the plate 10 can be installed on a turntable 11 which can be rotated around an axis perpendicular to the upper surface (road surface model R). By rotating the turntable 11 and inclining the traveling lane models 26 and 27 with respect to the simulated traveling wind, the simulated traveling wind can be applied to the air input detecting vehicle model 1 on the plate 10 obliquely from the front. Is configured.

When the turntable 11 is rotated in this manner (see FIG. 9), the plate 10 is provided on the side portion corresponding to the windward side of the plate 10 as shown in FIGS.
An additional device 14 having a side plate 10B continuous with the above can be mounted. The additional device 14 is supported and fixed by a stay 15A connected to the leg portion 15 of the plate 10.

The side plate (hereinafter referred to as the windward side) 10B equipped on the windward side is also shown in FIG.
As shown in FIG. 3, it is formed to have a streamlined cross-sectional shape CF43. Further, as shown in FIGS. 8, 9, and 12, the windward side plate 1 mounted on the plate 10
The front edge portion 10D and the rear edge portion 10E of 0B are shown in FIG.
As shown by the curve of CF43 in the plan view shape shown in FIG. 4, it is formed in a smooth convex curve shape, and the running wind is configured to smoothly flow without generating vortices and the like.

By the way, as shown in FIG. 1, the computing means 5 is equipped with a calibration control which is equipped to calibrate the interface section 16 and the pressure sensor 4 for transmitting the output of the pressure sensor 4 in a required state. It has a section 17. The interface unit 16 and the calibration control unit 17 are
Controlled by the pressure measurement control unit 18, the calibration and measurement are performed at required timings.

The measurement data is input to the computer 19 via the pressure measurement control section 18, and the computer 19 calculates and stores the measurement data. Further, the pressure sensor 4, the interface unit 16 and the pressure measurement control unit 18 are configured as shown in FIG. 5, and a transient transducer is provided by providing a pressure transducer for each measurement channel and electrically scanning at high speed. It is configured to measure pressure.

Further, the pressure measuring control section 18 is constructed as shown in FIGS. 6 and 7, and the pressure sensor 4 is connected to the calibration pressure signal Pcal in the connection state shown in FIG. Input is made to the pressure sensor 4 all at once. Further, in the connection state shown in FIG. 7, the detection signals of the pressure sensors 4 are output to the circuits Px1 to Px32.

Since the vehicle air input measuring apparatus as one embodiment of the present invention is configured as described above, for example, each operation as shown in the flowchart of FIG.
Although the required measurement is performed, the following operation is performed before the measurement. First, regarding the pressure sensor 4, FIG.
The calibration is performed by connecting the above-mentioned, and the state after the calibration is waited.

Further, a simulated running wind is circulated in the wind tunnel,
The air input detection vehicle model 1 as a fixed model is set to a state in which it is running in a simulated manner. At this time, the road surface model R
Since the windward end 10A of the plate 10 installed substantially horizontally in the wind tunnel is formed to have a streamlined cross section as shown in FIG. 13, the simulated traveling wind is not affected by the plate 10. It smoothly flows toward the vehicle model 1 for air input detection.

The leeward side end portion 10C of the plate 10
Is formed in a state where the edge is square, the rear end of the plate 10 is unlikely to adversely affect the traveling wind. Start the motor 13 in such a state,
The chain 12 is driven to start traveling of the traveling vehicle model 6 on the overtaking side. Then, first, in step S1, when the traveling vehicle model 6 as the overtaking vehicle reaches the reference position, a trigger signal for starting pressure measurement is output.

As a result, the pressure sensor 4 in the calculating means 5 is in the measuring state, and the output signal thereof is in the state of being input to the calculating means 5 via the interface section 16 and the pressure measuring control section 18. Then, the pressure measurement is started in step S2, and the instantaneous pressure value Pt is measured in step S3.

At this time, the connection state of the pressure sensor 4 is shown in FIG.
The pressure at the outer skin position of the air input detection vehicle model 1 acts on the pressure sensor 4 through the pressure detection hole 2 and the communication pipe 3 of the air input detection vehicle model 1, and at that position. The pressure is input to the calculation means 5. Then, in step S4, the pressure data is stored in the memory inside the pressure measuring device.

Next, in step S5, it is judged whether or not the measurement has been performed a predetermined number of times n, and if it has not reached n times, the operations of steps S3 and S4 are repeated through step S7. Here, the sampling number n is set to satisfy the following equation. n × Δt = D ÷ V Note that Δt is a minute sampling period (minute sampling time), which is counted by the timer in the pressure measuring device 4. D is the distance of the measurement section, and the detection start point is the point where the traveling vehicle model 6 is in the constant speed traveling state at the required speed after the acceleration section, and the detection end point is the point where the traveling vehicle model 6 shifts from the constant speed traveling state to the deceleration traveling. Then, the distance from the detection start point to the detection end point is the measurement section distance D. Further, V is the vehicle speed of the traveling vehicle model 6 within the measurement section distance D.

Then, in step S7, the minute sampling time Δt is counted by the timer inside the pressure measuring device 4, and the measurement is performed at every predetermined time interval Δt. When the number of times of measurement reaches the predetermined number n, step S6 is executed and the time-series pressure data stored in the memory inside the pressure measuring instrument is stored in the computer 1.
9 are transferred, the required arithmetic processing is performed, and a desired aerodynamic coefficient is calculated.

The measured pressure data is shown in FIG.
As shown in, the pressure-receiving area Si is used to convert into a pressure Pi acting on the relevant portion, and this pressure Pi is decomposed in each axial direction of X, Y, Z, and each direction component Xi, Yi, Zi is obtained. It is calculated. From these components, the directional angles α and β in polar coordinates of the positive pressure vector due to the aerodynamic force acting on the position as shown in FIG. 16 are calculated.

Using these data, the system shown in FIG. 4 is used to perform an operation according to the following equation. Drag D = Σ (Pi ・ Si ・ COSαi ・ COSβi) Lateral force S = Σ (Pi ・ Si ・ COSαi ・ SINβi) Yawing moment YM = Σ (Pi ・ Si ・ COSαi ・ COSβi ・ Y
i) -Σ {Pi ・ Si ・ COSαi ・ SINβi ・ (X
i-XCG)} That is, the aerodynamic force at a predetermined time is calculated by integrating the pressure on the vehicle body surface.

Then, by using these drag force D, lateral force S and yawing moment YM, aerodynamic coefficients Cd, Cs,
Cym is calculated. By the way, in the above-described experiment, since the simulated traveling wind is flowing from the traveling direction with respect to the vehicle model 1 for detecting air input, it is assumed that the vehicle model 1 for detecting air input is traveling straight with respect to the wind. Has been realized,
As shown in FIG. 9, by rotating the turntable 11 and inclining the vehicle model 1 for air input detection with respect to the flow direction of the simulated traveling wind, it is possible to measure the aerodynamic characteristics with respect to oblique or cross wind.

In this case, the additional device 14 is attached to the side of the plate 10 and is supported by the stay 15A. In this state, the same experiment as described above is performed to measure and calculate the aerodynamic characteristics with respect to the lateral wind. Further, regarding the above-mentioned experiment of the overtaking characteristic for straight traveling or the overtaking characteristic for crosswind, the air input detection vehicle model 1 overtakes the traveling vehicle model 6 by driving the traveling vehicle model 6 in the simulated traveling wind distribution direction. An overtaking mode experiment of the state can be performed.

Further, an experiment of the above-mentioned passing characteristic with respect to straight running or passing characteristic with respect to cross wind can be considered. For this, the traveling vehicle model 6 is driven in the circulation direction of the simulated traveling wind at a speed higher than that of the simulated traveling wind. Will be needed. Although it is difficult for the current technology to drive the traveling vehicle model 6 at a higher speed than the simulated traveling wind in this way, theoretically, if this is possible, the air input detection vehicle model 1 and the traveling vehicle model 6 are the same. You can perform passing mode experiments in the passing state.

The air input detecting vehicle model 1 described above can also be configured as a self-propelled model that can travel by itself. As an example of this case, as shown in FIG. 18, the calculating means 5 is provided inside the vehicle model 1 for detecting air input, and the bus 9 as the auxiliary vehicle model 6 on the overtaking side receives the air input while traveling by itself. By passing the detection vehicle model 1, the vehicle is overtaken and an experiment is conducted, and the calculation means 5
The aerodynamic characteristic value is calculated by

In this case, the above-described measuring device is mounted on the air input detecting vehicle model 1 itself, and the bus 9 as the traveling vehicle model 6 is caused to travel while the air input detecting vehicle model 1 is traveling, and The input detection vehicle model 1 is overtaken. The transient data at this time are measured in time series, and each calculation is performed in the same manner as when the vehicle model 1 for detecting air input is a fixed model.

In this case, the reference position of the bus 9 with respect to the air input detecting vehicle model 1 is detected by the photoelectric tube 8, and the relative position between the air input detecting vehicle model 1 and the bus 9 is detected by the ultrasonic distance 20. Can be configured as. When the air input detection vehicle model 1 is configured as a self-propelled model, the air input detection vehicle model 1 overtakes the bus 9 and an experiment in an overtaking state is sufficiently possible, and measurement is performed in the overtaking experiment mode. Is also done.

[0044]

As described above in detail, according to the vehicle air input measuring device of the present invention as defined in claim 1, a plurality of pressure detection holes are formed on the surface of the vehicle model for air input detection, and the pressure detection holes. A plurality of communication pipes arranged from each of the detection holes to the inside of the vehicle model, a pressure sensor connected to an end of the communication pipe to detect an air pressure applied to each of the pressure detection holes, and the pressure. With a configuration including a calculation means for calculating an aerodynamic characteristic value acting on the vehicle model based on each detection data of the sensor, it is possible to perform transient aerodynamic measurement at the time of overtaking or overtaking which has been difficult in the past. Like Further, the same measurement processing system can be used to develop it in an actual running test. Furthermore, it becomes possible to catch the phenomenon of passing in the downwind. Then, by reflecting such a measurement result on the design and manufacturing of the vehicle, various performances of the vehicle can be greatly improved.

According to the air input measuring device for a vehicle of the present invention as defined in claim 2, in the device as defined in claim 1, the air input detecting vehicle model is provided laterally with respect to the air input detecting vehicle model. With a configuration in which an auxiliary vehicle model that relatively moves relative to each other to overtake or overtake the air input detection vehicle model is provided, it is possible to realize a transient aerodynamic force measurement at the time of overtaking or overtaking, which was difficult in the past. Therefore, it can contribute to the improvement of various performances of the vehicle.

According to the air input measuring device for a vehicle of the present invention as defined in claim 3, in the device as defined in claim 2, a wind tunnel capable of generating a simulated running wind, and a road surface model installed in the wind tunnel. A fixed vehicle model fixed on the first traveling lane model on the road surface model and the first fixed vehicle model on the road surface model.
And a traveling vehicle model equipped on a second traveling lane model adjacent to the traveling lane model and capable of traveling in the traveling lane model direction, wherein the fixed vehicle model is configured as the air input detecting vehicle model, and the traveling A vehicle model is configured as the auxiliary vehicle model, and the fixed vehicle model is overtaken by the traveling vehicle model by causing the traveling vehicle model to travel against the simulated traveling wind while generating the simulated traveling wind. The experimental mode is set, and the arithmetic means is configured to calculate the aerodynamic characteristic value during execution of the overtaken experimental mode, thereby making it possible to obtain a transient transition at the time of overtaking which was difficult in the past. It becomes possible to realize aerodynamic force measurement and contribute to the improvement of various performances of the vehicle.

According to the vehicle air input measuring device of the present invention described in claim 4, in the device described in claim 2, a wind tunnel capable of generating a simulated traveling wind, and a road surface model installed in the wind tunnel. A fixed vehicle model fixed on the first traveling lane model on the road surface model and the first fixed vehicle model on the road surface model.
And a traveling vehicle model equipped on a second traveling lane model adjacent to the traveling lane model and capable of traveling in the traveling lane model direction, wherein the fixed vehicle model is configured as the air input detecting vehicle model, and the traveling An overtaking experiment mode in which a vehicle model is configured as the auxiliary vehicle model, and the fixed vehicle model overtakes the traveling vehicle model by causing the traveling vehicle model to travel in the direction of the simulated traveling wind while generating the simulated traveling wind. Is set, and the arithmetic means is configured to calculate the aerodynamic characteristic value during execution of the overtaking experiment mode, thereby making it possible to perform transient aerodynamic measurement at the time of overtaking, which has been difficult in the past. This can be realized, which can contribute to the improvement of various vehicle performances.

According to the air input measuring device for a vehicle of the present invention described in claim 5, in the device according to claim 1, the air input detecting vehicle model is run beside the air input detecting vehicle model. With the configuration in which the auxiliary vehicle model that runs in the opposite direction to the passing direction is provided, it becomes possible to easily and reliably realize the transient aerodynamic force measurement at the time of passing, which was difficult in the past. It can contribute to the improvement of various performances.

According to the vehicle air input measuring device of the present invention described in claim 6, in the device described in claim 1, the air input detecting vehicle model is configured as a self-propelled model capable of traveling by itself. With the configuration in which the calculation means is provided inside the air input detection vehicle model, it is possible to easily and reliably perform transient aerodynamic measurement at the actual vehicle level, which has been difficult in the past, such as overtaking, overtaking, and passing. And can contribute to the improvement of various vehicle performances.

According to a seventh aspect of the present invention, there is provided the vehicle air input measuring device according to any one of the first to sixth aspects, wherein the calculating means includes the pressure sensors from the above pressure sensors at a required cycle. With the configuration that the aerodynamic characteristic value acting on the vehicle model is calculated while taking in the detection data of, the transient characteristic at the time of overtaking, etc. can be obtained as data over time, and various vehicle characteristics can be obtained. It can contribute to the improvement of performance.

According to the vehicle air input measuring device of the eighth aspect of the present invention, in the device of the third or fourth aspect,
When the road surface model is formed as an upper surface on a plate installed almost horizontally in the wind tunnel, and the windward end of the plate is configured to have a streamlined cross section, when overtaking or overtaking, etc. The aerodynamic characteristics can be accurately obtained without being adversely affected by the road surface model, which can contribute to improvement of various performances of the vehicle.

According to a ninth aspect of the vehicle air input measuring apparatus of the present invention, in the apparatus of the eighth aspect, the plate is rotated about an axis perpendicular to the upper surface of the plate. It is installed on a turntable that can be driven, and is configured so that the simulated traveling wind can be added to the vehicle model for air input detection on the plate from diagonally forward, and the windward side of the plate. Due to the configuration that the part has a streamlined cross section, it becomes possible to obtain aerodynamic characteristics against wind from an oblique or lateral direction at the time of overtaking or overtaking, which can contribute to the improvement of various vehicle performances. .

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an overall configuration of a vehicle air input measuring device as an embodiment of the present invention.

FIG. 2 is a schematic perspective view showing a drive system of a vehicle air input measuring device according to an embodiment of the present invention.

FIG. 3 is a schematic side view showing a drive system of a vehicle air input measuring device according to an embodiment of the present invention.

FIG. 4 is a block diagram for explaining the operation of the vehicle air input measuring device as one embodiment of the present invention.

FIG. 5 is a circuit diagram showing a part of an electrical connection system of a vehicle air input measuring device according to an embodiment of the present invention.

FIG. 6 is a circuit diagram for explaining the operation of the vehicle air input measuring device as one embodiment of the present invention.

FIG. 7 is a circuit diagram for explaining the operation of the vehicle air input measuring device as one embodiment of the present invention.

FIG. 8 is a schematic perspective view of a drive system showing a modified example of a vehicle air input measuring device according to an embodiment of the present invention.

FIG. 9 is a schematic plan view for explaining the operation of the modified example of the vehicle air input measuring device according to the embodiment of the present invention.

FIG. 10 is a schematic perspective view showing a mounted state of a deflected wind additional component in the vehicle air input measuring device as one embodiment of the present invention.

FIG. 11 is a schematic front view showing a mounting state of the deflected wind additional component in the vehicle air input measuring device as one embodiment of the present invention.

FIG. 12 is a schematic plan view showing a mounting state of a deflected wind additional component in the vehicle air input measuring device as one embodiment of the present invention.

FIG. 13 is a schematic front view showing an additional component for deflected wind of the vehicle air input measuring device as one embodiment of the present invention.

FIG. 14 is a schematic diagram for explaining the shape of an additional component for deflected air in the vehicle air input measuring device as one embodiment of the present invention.

FIG. 15 is a schematic diagram showing the operation of the vehicle air input measuring device according to the embodiment of the present invention.

FIG. 16 is a schematic view showing the operation of the vehicle air input measuring device according to the embodiment of the present invention.

FIG. 17 is a flowchart for explaining the operation of the vehicle air input measuring device as one embodiment of the present invention.

FIG. 18 is a schematic diagram showing a vehicle air input measuring device as one embodiment of the present invention, which is used in a running test.

FIG. 19 is a schematic perspective view showing a conventional aerodynamic force measuring device.

[Explanation of Codes] 1 Air input detection vehicle model 2 Pressure detection hole 3 Communication pipe 4 Pressure sensor (pressure measuring device) 5 Calculation means 6 Traveling vehicle model 8 Phototube 9 Bus 10 Plate 10A Windward end 10B Windward side (Windward side plate) 10C Downward end 10D Front edge 10E Rear edge 11 Turntable 12 Chain 13 Motor 14 Additional device 15 Plate 10 leg 15A Stay 16 Interface 17 Calibration control 18 Pressure measurement Control unit 19 Computer 20 Ultrasonic distance sensor 26 First traveling lane model 27 Second traveling lane model 101 First lift balance 102 Second lift balance 103 Drag balance 104 Normal passenger car model 105 Vehicle model 106 Straight drive source

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Kawai 5-3-8, Shiba, Minato-ku, Tokyo Mitsubishi Motors Corporation (72) Inventor Hitoshi Fukuda 5-3-8, Shiba, Minato-ku, Tokyo Mitsubishi Automotive Industry Co., Ltd.

Claims (9)

[Claims] 1. A plurality of pressure detection holes formed on the surface of a vehicle model for air input detection, a plurality of communication pipes arranged from the respective pressure detection holes to the inside of the vehicle model, and the communication pipe. A pressure sensor connected to the end of the pressure sensor for detecting the air pressure applied to each of the pressure detection holes, and an arithmetic means for calculating an aerodynamic characteristic value acting on the vehicle model based on each detection data of the pressure sensor. An air input measuring device for a vehicle, which is characterized in that 2. An auxiliary vehicle model is provided on the side of the air input detecting vehicle model to move relative to the air input detecting vehicle model to overtake or overtake the air input detecting vehicle model. The air input measuring device for a vehicle according to claim 1, wherein 3. A wind tunnel capable of generating a simulated running wind, a road surface model installed in the wind tunnel, a fixed vehicle model fixed on a first traveling lane model on the road surface model, and the road surface model. The fixed vehicle model is configured as the vehicle model for air input detection, the vehicle model being equipped on the second traveling lane model adjacent to the first traveling lane model above, and capable of traveling in the traveling lane model direction. In addition, the traveling vehicle model is configured as the auxiliary vehicle model, and the traveling vehicle model is caused to travel against the simulated traveling wind while generating the simulated traveling wind, and the fixed vehicle model is the traveling vehicle. An overtaking experiment mode to be overtaken by a model is set, and the arithmetic means is configured to calculate the aerodynamic characteristic value during execution of the overtaking experiment mode. The air input measuring device for a vehicle according to claim 2, wherein 4. A wind tunnel capable of generating a simulated traveling wind, a road surface model installed in the wind tunnel, a fixed vehicle model fixed on a first traveling lane model on the road surface model, and the road surface model. The fixed vehicle model is configured as the vehicle model for air input detection, the vehicle model being equipped on the second traveling lane model adjacent to the first traveling lane model above, and capable of traveling in the traveling lane model direction. In addition, the traveling vehicle model is configured as the auxiliary vehicle model, and the traveling vehicle model is run in the direction of the simulated traveling wind while generating the simulated traveling wind, and the fixed vehicle model is the traveling vehicle model. An overtaking experiment mode of overtaking is set, and the arithmetic means is configured to calculate the aerodynamic characteristic value during execution of the overtaking experiment mode. The air input measuring device for a vehicle according to claim 2. 5. An auxiliary vehicle model is provided laterally of the air input detecting vehicle model, the auxiliary vehicle model traveling in a direction opposite to a traveling direction of the air input detecting vehicle model and passing each other. The air input measuring device for a vehicle according to claim 1. 6. The air input detecting vehicle model is configured as a self-propelled model capable of traveling by itself, and the calculating means is provided inside the air input detecting vehicle model. The air input measuring device for a vehicle according to claim 1. 7. The calculating means is configured to calculate an aerodynamic characteristic value acting on the vehicle model while taking in detection data from each of the pressure sensors at a required cycle. The vehicle air input measuring device according to any one of claims 1 to 6. 8. The road surface model is formed as an upper surface on a plate installed substantially horizontally in the wind tunnel, and the windward end of the plate is configured to have a streamlined cross section. The air input measuring device for a vehicle according to claim 3 or 4. 9. The plate is installed on a turntable capable of rotating the plate around an axis perpendicular to an upper surface of the plate, and the vehicle model for detecting the air input on the plate. 9. The vehicle according to claim 8, wherein the simulated traveling wind can be applied obliquely from the front, and the windward side portion of the plate has a streamlined cross section. Air input measuring device.