JP3239740B2 - Air input measurement device for vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular air input measuring device suitable for use in 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 number of opportunities to drive a car at high speed has increased due to the spread of expressways and the improvement of power performance of the car. As the vehicle speed increases, the unsteady aerodynamic force tends to affect the running posture of the vehicle, and one of the issues is to ensure running stability during high-speed running. Such unsteady aerodynamic forces are generated when the wind speed and direction of the natural wind change due to the influence of the weather and the terrain, and when the vehicle passes by another vehicle or passes by another vehicle (when passing). The two are mainly considered.

[0003] Among them, the former is called aerodynamic force when receiving a crosswind, and many studies have been made. In contrast to the latter, the latter, that is, a running car is overtaken by another car, etc. The effects of aerodynamic forces have not been well studied. By the way, when a running small car is overtaken by a large car, a phenomenon that the small car is attracted to the large car (hereinafter referred to as a sucking phenomenon) is known to occur. .

[0004] With respect to such a sucking phenomenon, it is necessary to conduct a wind tunnel experiment in order to clarify the motion 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 the relative size of the object.
Each force was measured using a balance.

[0005] For example, FIG. 19 is a schematic perspective view showing a conventional measurement state of aerodynamic force. As shown in FIG. 19, a model imitating an ordinary car on the overtaking side (small model on the overtaking side). 101 is arranged and provided on a plate 102 imitating a vertically running road surface. Therefore, this overtaken small model 101 is:
It is installed with its top and bottom facing sideways.

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

[0007] The overtaken small model 101 is pivotally supported by a shaft 105 so as to be rotatable about the center of the upper and lower surfaces, and its front and rear ends are connected to a first lifting balance 106 and a second lifting balance 107. They are connected by piano wires 108A and 108B. The shaft 105 is connected to a drag balance 110 through a support rod 109. Thus, 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 responsiveness of the balance to the measurement of the transient 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, there is a problem that an experiment cannot be performed by accelerating the vehicle to a required speed by such means, and a transient phenomenon cannot be sufficiently captured.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and enables the vehicle to be sufficiently accelerated and measured so as to simulate the actual running state of the vehicle, and when the vehicle is overtaken or overtaken. It is an object of the present invention to provide a vehicle air input measuring device capable of sufficiently capturing a phenomenon of a transient air input state to a vehicle in the above.

[0010]

According to a first aspect of the present invention, there is provided an air input measuring device for a vehicle, comprising: a plurality of pressure detecting holes formed on a surface of a vehicle model for detecting an air input; A plurality of communication pipes arranged on the inside of the vehicle model from each of the pressure sensors, 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. calculating means for calculating the aerodynamic characteristic value acting on said vehicle model based on the detection data, the air-
At the side of the air input detection vehicle model, the air input detection vehicle
The vehicle model for air input detection moves relative to both models.
Vehicle that overtakes or is overtaken
It is characterized by having Dell .

[0011] 請 Motomeko 2 vehicle air input measuring apparatus of the invention described, the apparatus of claim 1, a wind tunnel capable of generating simulated running wind, and the road surface model installed in該風sinuses, A fixed vehicle model fixed on a first traveling lane model on the road surface model and a 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 The stationary vehicle model is configured as the air input detection vehicle model, and 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 in which the vehicle model is run against the simulated running wind and the fixed vehicle model is overtaken by the running vehicle model is set, and the arithmetic means It is characterized by being configured so as to calculate the aerodynamic characteristic values during the experiment mode.

[0012] The vehicle air input measurement apparatus of the present invention according to claim 3, The apparatus of claim 1, a wind tunnel capable of generating simulated running wind, and the road surface model installed in該風sinuses, the A fixed vehicle model fixed on a first traveling lane model on a road surface model; and a second traveling lane model provided adjacent to the first traveling lane model on the road surface model and capable of traveling in the traveling lane model direction. A fixed vehicle model is configured as the air input detection vehicle model, and the traveling vehicle model is configured as the auxiliary vehicle model, and the traveling vehicle model is configured to generate the simulated traveling wind. An overtaking experiment mode in which the model is run in the direction of the simulated running wind and the fixed vehicle model overtakes the running vehicle model is set, and the calculation means includes:
The aerodynamic characteristic value is calculated during execution of the overtaking experiment mode.

According to a fourth aspect of the present invention, there is provided an air input measuring device for a vehicle according to the second or third aspect, wherein
The model is mounted on a plate placed almost horizontally in the wind tunnel.
Formed as an upper surface, the windward end of the plate is streamlined
It is characterized by having a cross section . An air input measuring device for a vehicle according to claim 5.
The apparatus according to claim 4, wherein the plate comprises:
Rotate the rate around its axis perpendicular to its upper surface.
Installed on a turntable and the plate
With respect to the vehicle model for air input detection,
While being configured to be able to add a pseudo running wind,
Configured so that the windward side of the plate has a streamlined cross section
It is characterized by being. According to a sixth aspect of the present invention, there is provided the air input measuring device for a vehicle according to the first aspect, wherein the air input detecting vehicle model is configured as a self-propelled model capable of running on its own. It is characterized in that it is provided inside an air input detection vehicle model.

According to a seventh aspect of the present invention, there is provided a vehicle air input measuring device formed on a surface of a vehicle model for detecting an air input.
From each of the detected pressure detection holes and the pressure detection holes.
A plurality of communication pipes disposed on the inner side of both models;
Air connected to the end of the pipe and applied to each of the above pressure detection holes
A pressure sensor for detecting pressure, and respective detection data of the pressure sensor.
Aerodynamic characteristic value acting on the vehicle model based on the data
Computing means for performing the calculation and the side of the vehicle model for detecting the air input.
In the direction opposite to the running direction of the vehicle model for detecting air input.
It is characterized by having an auxiliary vehicle model that runs and passes each other. According to an eighth aspect of the present invention, there is provided the vehicle air input measuring device according to any one of the first to seventh aspects, wherein the calculating means is configured to perform the operation at a required period.
While taking in the detection data from each of the pressure sensors
It is configured to calculate the aerodynamic characteristic values acting on both models.
It is characterized by having been.

[0015]

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 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 entire configuration, FIG. 2 is a schematic perspective view showing a model for measurement, FIG. 3 is a schematic side view showing a 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, and 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 modification, FIG. 11 is a schematic front view showing a mounting status of the deflection wind additional component, and FIG. FIG. 13 is a schematic plan view showing the mounting state, FIG. 13 is a schematic front view showing the road surface model member and the additional component for deflected wind, FIG. 14 is a schematic diagram for explaining the shape of the additional component for deflected wind,
FIGS. 15 and 16 are schematic views showing the operation, and FIGS.
FIG. 18 is a flowchart for explaining the operation, and FIG. 18 is a schematic diagram showing a state of adoption during an 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 detecting holes 2 are formed on the surface of a vehicle model 1 for detecting air input. The inside of the detection hole 2 inside the vehicle model 1 is connected to one end of the communication pipe 3. The other ends of these communication pipes 3 are led out of the vehicle model 1, and pressure sensors (pressure measuring devices) 4 are connected to the outside ends of the communication pipes 3, and the pressure detection holes 2 are provided. Is configured to detect the air pressure applied to the air.

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

On the side of the vehicle model 1 for detecting air input, an auxiliary vehicle model 6 which moves relative to the vehicle model 1 for detecting air input and passes or overtakes the vehicle model 1 for detecting air input. Is provided. That is, the road surface model R of the vehicle air input measurement device S is configured to be installed in a wind tunnel where a simulated traveling wind can be generated, and on the first traveling 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. On this second traveling lane model 27, a traveling vehicle model as an auxiliary vehicle model is provided. 6 is provided so as to be able to travel in the traveling lane model direction. The traveling vehicle model 6 is configured to be driven by a motor 13 via a chain 12.

Therefore, by running the traveling vehicle model 6 against the simulated traveling wind while generating the simulated traveling wind, the fixed vehicle model 1 is overtaken by the traveling vehicle model 6 to set an overtaking experiment mode. It is configured to: The aerodynamic characteristic value is calculated by the calculating means 5 during the execution of the overtaking experiment mode realized as described above.

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

Further, 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 to incline 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 detection vehicle model 1 on the plate 10 from obliquely forward. It is configured as follows.

When the turntable 11 is rotated in this manner (see FIG. 9), the side of the plate 10 which corresponds to the windward side, as shown in FIGS.
And an additional device 14 having a side plate 10B continuous with the side plate 10B. The additional device 14 is supported and fixed by a stay 15A connected to the leg 15 of the plate 10.

The side plate (hereinafter referred to as the windward side) 10B mounted 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. As shown in FIGS. 8, 9, and 12, the windward side plate 1 attached to the plate
The leading edge 10D and the trailing edge 10E of FIG.
As shown in a curve denoted by CF43 in each plan view shape shown in FIG. 4, it is formed in a smooth convex curved shape, and the running wind is configured to flow smoothly without generating a vortex or the like.

As shown in FIG. 1, the arithmetic means 5 includes an interface section 16 for transmitting the output of the pressure sensor 4 in a required state and a calibration control provided for performing calibration of the pressure sensor 4. A part 17 is provided. The interface unit 16 and the calibration control unit 17
The pressure and the pressure are controlled by the control unit 18 so that calibration and measurement are performed at required timing.

The measurement data is input to the computer 19 via the pressure measurement control section 18, and the measurement data is calculated and stored by the computer 19. The pressure sensor 4, the interface unit 16, and the pressure measurement control unit 18 are configured as shown in FIG. 5, and each of the measurement channels is provided with a pressure transducer, and by performing high-speed scanning electrically, transient fluctuations are caused. It is configured so that pressure can be measured.

Further, the pressure measurement control section 18 is configured as shown in FIGS. 6 and 7. In the connection state shown in FIG. 6, the pressure sensor 4 is connected to the calibration pressure signal Pcal, and the reference pressure is set to each value. The signals are simultaneously input to the pressure sensor 4. Further, in the connection state shown in FIG. 7, the configuration is such that the detection signal of each pressure sensor 4 is output to each of the circuits Px1 to Px32.

Since the air input measuring device for a vehicle as one embodiment of the present invention is configured as described above, for example, each operation as shown in the flowchart of FIG.
The required measurement is performed. Prior to the measurement, the following operation is performed. First, regarding the pressure sensor 4, FIG.
Is performed, calibration is performed, and the apparatus stands by in a state after the calibration.

Further, a simulated traveling wind is circulated in the wind tunnel,
The air input detection vehicle model 1 as a fixed model is assumed to be running in a pseudo manner. At this time, the road surface model R
The simulated traveling wind is not affected by the plate 10 because 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. It flows smoothly to the vehicle model 1 for air input detection.

The leeward end 10C of the plate 10
Is formed in a state where the edges are square, the rear end of the plate 10 is less likely to adversely affect the traveling wind. In such a state, the motor 13 is started,
The chain 12 is driven to start traveling of the traveling vehicle model 6 on the overtaking side. First, in step S1, when the traveling vehicle model 6 as an 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 a measurement state, and the output signal is input to the calculating means 5 via the interface section 16 and the pressure measuring control section 18. Then, pressure measurement is started in step S2, and an 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 The pressure is input to the calculation means 5. Then, in step S4, pressure data is stored in a memory inside the pressure measuring device.

Next, at step S5, it is determined whether or not predetermined n times of measurement have been performed. If the number of times has not been reached, the operations of steps S3 and S4 are repeated through step S7. Here, the sampling number n is set so as to satisfy the following equation. n × Δt = D ÷ V Here, Δt is a minute sampling period (minute sampling time), and is counted by a timer in the pressure measuring device 4. D is the distance of the measurement section, the detection start point is the point at which the traveling vehicle model 6 has entered the constant speed traveling state at the required speed through the acceleration section, and the detection end point is the point at which the transition from the constant speed traveling state to deceleration traveling is made. When, distance from the detecting start point to the detection end point is the measurement interval distance D. V is the vehicle speed of the traveling vehicle model 6 within the measurement section distance D.

Then, in step S7, the above-mentioned minute sampling time Δt is counted by the timer inside the pressure measuring device 4, and the measurement is performed at predetermined time intervals Δt. When the measurement has reached the predetermined number n, step S6 is executed, and the time-series pressure data stored in the memory inside the pressure measuring device is stored in the computer 1.
9 and the necessary arithmetic processing is performed to calculate a desired aerodynamic coefficient.

The measured pressure data is shown in FIG.
The pressure Pi acting on the relevant portion is converted into the pressure Pi acting on the corresponding portion by using the pressure receiving area Si as shown in (1), and the pressure Pi is decomposed in each of the X, Y, and Z axial directions, and each direction component Xi, Yi, Zi is Is calculated. From these components, the direction angles α and β in the 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, a system shown in FIG. 4 performs 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, using these drag 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 to the air input detection vehicle model 1, it is assumed that the air input detection vehicle model 1 is traveling straight against the wind. Has been realized,
As shown in FIG. 9, by rotating the turntable 11 and inclining the air input detection vehicle model 1 with respect to the flow direction of the simulated traveling wind, it is possible to measure the aerodynamic characteristics with respect to the 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, by performing an experiment in the same manner as described above, measurement and calculation of the aerodynamic characteristics with respect to the crosswind are performed. In the experiment of the overtaking characteristic for the straight traveling or the overtaking characteristic for the crosswind described above, the vehicle model 1 for air input detection overtakes the traveling vehicle model 6 by driving the traveling vehicle model 6 in the flow direction of the simulated traveling wind. An overtaking mode experiment of the state can be performed.

Further, it is also conceivable to conduct an experiment of the above-described passing characteristic for straight traveling or passing characteristic for crosswind. For this purpose, the traveling vehicle model 6 is driven at a higher speed than the simulated traveling wind in the flow direction of the simulated traveling wind. It becomes necessary. This way the traveling vehicle model 6 be run in simulated running faster than wind is also difficult in the current technology, if in this way, theoretically air input detection vehicle model 1 and the traveling vehicle model 6 Passing mode experiments can be performed in passing states.

Incidentally, the above-described vehicle model 1 for detecting an air input may be configured as a self-propelled model capable of running by itself. As an example of this case, as shown in FIG. 18, the arithmetic means 5 is provided inside the air input detecting vehicle model 1, and the bus 9 as the overtaking auxiliary vehicle model 6 is connected to the self-propelled air input. By overtaking the vehicle model 1 for detection, the vehicle is overtaken and an experiment is performed.
Of the aerodynamic characteristic value is calculated.

In this case, the measuring device described above is mounted on the vehicle model 1 itself for detecting air input, and the bus 9 as the vehicle model 6 is run while the vehicle model 1 for detecting air input is running. Pass the vehicle model 1 for input detection. The transient data at this time is measured in time series, and each calculation is performed in the same manner as in the case where the air input detection vehicle model 1 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. It can be configured as follows. When the air input detection vehicle model 1 is configured as a self-propelled model, the air input detection vehicle model 1 can sufficiently pass the bus 9 and also perform an experiment in an overtaking state. Is also performed.

[0044]

As described above in detail, according to the air input measuring device for a vehicle according to the first aspect of the present invention, a plurality of pressure detecting holes formed on the surface of the vehicle model for detecting the air input, 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 air pressure applied to each of the pressure detection holes; calculating means for calculating the aerodynamic characteristic value acting on said vehicle model on the basis of the detection data of the sensor, the air-
At the side of the air input detection vehicle model, the air input detection vehicle
The vehicle model for air input detection moves relative to both models.
Vehicle that overtakes or is overtaken
With the configuration including Dell, it becomes possible to measure transient aerodynamic force at the time of overtaking, overtaking, etc., which was difficult in the past. Moreover, it can also be developed for an actual running test using a similar measurement processing system. Furthermore, it is possible to capture the phenomenon of overtaking in a downwind side.
Then, by reflecting such a measurement result in the design, manufacture, and the like of the vehicle, various performances of the vehicle can be greatly improved.

[0045]

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 a wind tunnel capable of generating a simulated traveling wind and a road surface model installed in the wind tunnel are provided. A fixed vehicle model fixed on a first driving lane model on the road surface model, and a first vehicle model on the road surface model;
A traveling vehicle model mounted 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 detection vehicle model; The vehicle model is configured as the auxiliary vehicle model, and the traveling vehicle model is run against the simulated traveling wind while generating the simulated traveling wind, and the fixed vehicle model is overtaken by the traveling vehicle model. An experiment mode is set, and the calculation means is configured to calculate the aerodynamic characteristic value during the execution of the overtaking experiment mode. Aerodynamic force measurement can be realized, which can contribute to improvement of various performances of the vehicle.

According to a third aspect of the present invention, there is provided a vehicle air input measuring apparatus according to the first aspect , wherein a wind tunnel capable of generating a simulated traveling wind and a road surface model installed in the wind tunnel are provided. A fixed vehicle model fixed on a first driving lane model on the road surface model, and a first vehicle model on the road surface model;
A traveling vehicle model mounted 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 detection vehicle model; An overtaking experiment mode in which a vehicle model is configured as the auxiliary vehicle model and the stationary 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 the execution of the overtaking experiment mode, so that the transient aerodynamic measurement at the time of overtaking, which was conventionally difficult, is performed. This 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 described in claim 4, in the device according to claim 2 or 3 ,
The road surface model is installed in the wind tunnel almost horizontally.
The upper end of the plate is
It is configured to have a streamlined cross section.
The aerodynamic characteristics during overtaking, overtaking, etc.
To be accurate without being affected by Dell.
This can contribute to the improvement of various performances of the vehicle.

The air input meter for a vehicle according to the fifth aspect of the present invention.
According to the measuring device, in the device according to claim 4, the press
The plate is pivoted about an axis perpendicular to its upper surface.
Installed on a turntable that can rotate
Oblique to the vehicle model for detecting air input on the rate
It is configured to be able to add the simulated traveling wind from the front
And the windward side of the plate has a streamlined cross section
Configuration so that when passing or overtaking
Counters winds from oblique or sideways direction
Aerodynamic characteristics can be obtained,
It can contribute to improvement. According to the air input measuring device for a vehicle of the present invention according to claim 6, in the device according to claim 1,
The air input detection vehicle model is configured as a self-propelled model capable of running on its own, and the arithmetic means is provided inside the air input detection vehicle model. Transient aerodynamic measurement at the time of passing or passing each other can be easily and reliably realized at the actual vehicle level, which can contribute to improvement of various performances of the vehicle.

According to the vehicle air input measuring device of the present invention, the surface of the vehicle model for detecting the air input is duplicated.
The number of pressure detection holes formed and each of the pressure detection holes
A plurality of communication pipes arranged inside the vehicle model,
It is connected to the end of the communication pipe and is applied to each of the pressure detection holes.
Pressure sensor for detecting the air pressure
Aerodynamic characteristic value acting on the vehicle model based on the output data
Calculating means for calculating a vehicle model for detecting the air input
Opposite to the running direction of the vehicle model for detecting air input.
Auxiliary vehicle model that runs in the direction
Overtaking was difficult because of the configuration
Can measure transient aerodynamic force such as when passing or overtaking
Become. In addition, using the same measurement processing system,
It can also be developed for testing. In addition, additional
It becomes possible to catch the phenomenon of the coming. And this
Such measurement results can be reflected in vehicle design and manufacturing, etc.
With this, various performances of the vehicle can be greatly improved
Become like

[0051]

According to the air input measuring device for a vehicle according to the present invention described in claim 8, in the device according to any one of claims 1 to 7 , the arithmetic means includes the above-mentioned pressures in a required cycle.
While taking in the detection data from the sensor, the vehicle model
Is configured to calculate aerodynamic characteristic values acting on
With this configuration, transient characteristics such as overtaking
Data that can be used to improve vehicle performance.
Can contribute to the above.

[Brief description of the drawings]

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

FIG. 2 is a schematic perspective view showing a drive system of the vehicle air input measurement device as one embodiment of the present invention.

FIG. 3 is a schematic side view showing a drive system of the air input measuring device for a vehicle as one 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 the vehicle air input measuring device as one embodiment of the present invention.

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

FIG. 9 is a schematic plan view for explaining an operation of a modified example of the vehicle air input measurement device as one embodiment of the present invention.

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

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

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

FIG. 15 is a schematic diagram showing the operation of the vehicle air input measurement device as one embodiment of the present invention.

FIG. 16 is a schematic view showing the operation of the vehicle air input measurement device as one embodiment of the present invention.

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

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

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vehicle model for air input detection 2 Pressure detection hole 3 Communication pipe 4 Pressure sensor (pressure measuring instrument) 5 Calculation means 6 Traveling vehicle model 8 Photoelectric tube 9 Bus 10 Plate 10A Windward end 10B Windward side (windward side) 10C Downwind side end 10D Front edge 10E Rear edge 11 Turntable 12 Chain 13 Motor 14 Addition device 15 Leg of plate 10 15A Stay 16 Interface 17 Calibration control 18 Pressure measurement control 19 Computer 20 Ultrasonic distance sensor 26 First travel lane model 27 Second travel 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

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroshi Kawai 5-33-8 Shiba, Minato-ku, Tokyo Inside Mitsubishi Motors Corporation (72) Inventor Hitoshi Fukuda 5-33-8 Shiba, Minato-ku, Tokyo (56) References JP-A-62-35235 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G01M 9/06 G01L 9/00 G01M 17 / 007

Claims (8)

(57) [Claims] 1. A plurality of pressure detection holes formed on a surface of a vehicle model for detecting an air input, a plurality of communication pipes provided from each of the pressure detection holes to the inside of the vehicle model, and the communication pipe. a pressure sensor connected to the end portion detects the air pressure applied to the pressure detecting hole of the, arithmetic means for calculating the aerodynamic characteristic value acting on said vehicle model on the basis of the detection data of the pressure sensor, the At the side of the air input detection vehicle model, the air input detection
The air input detection vehicle moves relative to the outgoing vehicle model.
Overtaking or overtaking assistance for both models
An air input measurement device for a vehicle, comprising a vehicle model . 2. A wind tunnel capable of generating a simulated traveling wind , a road surface model installed in the wind tunnel, and fixed on a first traveling lane model on the road surface model.
A fixed vehicle model and a first vehicle lane model adjacent to the first driving lane model on the road surface model.
Equipped on 2 driving lane model, driving lane model direction
The fixed vehicle model is a vehicle model for detecting air input.
And the traveling vehicle model is the auxiliary vehicle.
Both models are configured to generate the simulated traveling wind while simulating the traveling vehicle model.
The stationary vehicle model
The overtaken experiment mode overtaken by the vehicle model
Is set, and the calculating means executes the overtaking experiment mode during execution.
It is configured to calculate the aerodynamic characteristic value of
The air input measurement device for a vehicle according to claim 1, wherein the air input measurement device is a vehicle. 3. A wind tunnel capable of generating a simulated traveling wind , a road surface model installed in the wind tunnel, and fixed on a first traveling lane model on the road surface model.
A fixed vehicle model and a first vehicle lane model adjacent to the first driving lane model on the road surface model.
Equipped on 2 driving lane model, driving lane model direction
The fixed vehicle model is a vehicle model for detecting air input.
And the traveling vehicle model is the auxiliary vehicle.
Both models are configured to generate the simulated traveling wind while simulating the traveling vehicle model.
The stationary vehicle model
An overtaking experiment mode has been set to overtake the vehicle model.
The arithmetic means may perform the above-mentioned operation during the overtaking experiment mode.
Characterized in that it is configured to calculate aerodynamic characteristic values
The vehicle air input measurement device according to claim 1, wherein: 4. The road surface model is installed substantially horizontally in the wind tunnel.
It is formed as an upper surface on a placed plate , and the windward end of the plate has a streamlined cross section.
4. The method according to claim 2, wherein
Air input measurement device for vehicles. 5. The method according to claim 5, wherein the plate has the plate on its upper surface.
Turntable that can be rotated around the axis perpendicular to the axis
Installed on the vehicle for detecting the air input on the plate
Apply the simulated running wind to the model from diagonally forward
So that the windward side of the plate has a streamlined cross section.
5. The vehicle according to claim 4, wherein
Air input measurement device. 6. The air input detection vehicle model is configured as a self-propelled model capable of running on its own, and the calculation means is provided inside the air input detection vehicle model. The air input measurement device for a vehicle according to claim 1. 7. A plurality of air input detecting vehicle models are provided on a surface of the vehicle model.
The pressure detection holes formed and the pressure detection holes are arranged from each of the pressure detection holes to the inside of the vehicle model.
A plurality of communication pipes provided and connected to the ends of the communication pipes to apply pressure to the respective pressure detection holes.
Pressure sensor for detecting the air pressure of the vehicle, and the vehicle model based on each detection data of the pressure sensor.
Calculating means for calculating an aerodynamic characteristic value acting on the air input detection vehicle model;
Passing in the opposite direction to the traveling direction of the outgoing vehicle model
It is characterized by having an auxiliary vehicle model that performs
A vehicle air input measurement device. 8. The method according to claim 1, wherein the calculating means performs the above-mentioned pressure control at a required cycle.
While capturing the detection data from the force sensor, the vehicle model
Aerodynamic characteristic value acting on the
The method according to any one of claims 1 to 7, wherein
Air input measurement device for vehicles.