JPS59164933A - Running resistance setting apparatus of chassis dynamo - Google Patents

Abstract

PURPOSE:To make it possible to apply load equivalent to real running, by constituting the titled apparatus so as to apply a value, which is obtained by subtracting the output of a dynamo loss correcting device and the output of a tire loss correcting device from the output of a running resistance generator, to the power absorbing part of a dynamo. CONSTITUTION:In such a state that a bicycle to be tested is not placed on a dynamo roller 1, switches 9a, 9b are changed over to an A-side and detection torque at each speed of a speed setting device 10 is set to a dynamo loss correcting device 7. In the next step, the set value of the dynamo loss correcting device 7 is subtracted from the detection torque at each speed in such a state that the bicycle to be tested is placed on the dynamo roller 1 and the obtained value is inputted to a tire loss correcting device 8. After these settings are completed, running characteristics of a real road are set to a running resistance setting device 6 and, subsequently, when the switches 9a, 9b are changed over to a B-side, the power absorbing amount of a power absorbing part 2 is controlled to the value obtained by subtracting dynamo loss (a) and tire loss from a running resistance amount. By this method, load equivalent to real running can be applied.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a running resistance setting device for a chassis dynamo.

<Prior art> When controlling the running resistance of a chassis dynamo, when the running resistance target value F'S obtained from the actual running of the test vehicle is added to the power absorption part, the running resistance value of the dynamo roller is adjusted to the target value FS.
The total value is the mechanical loss Ft of the dynamo.

Therefore, the mechanical loss F of the dynamo is calculated from the target value FB in advance.
The value subtracted by t must be added to the power absorption section of the dynamo.

Such a concept is also disclosed in Japanese Patent Application Laid-open No. 14517/1983, and has been conventionally practiced.

However, as mentioned above, F is applied to the power absorption part of the dynamo.
Even if the running resistance is set for B-Ft, when the test vehicle is placed on the dynamo roller, it is not possible to apply a load equivalent to the actual driving to the test vehicle, and therefore the 10-mode fuel efficiency etc. Even after several tests, accurate measurements cannot be made.

This is because, according to the inventor's findings, when a test vehicle is driven on a dynamo roller, in addition to the mechanical loss of the dynamo, there is tire loss due to tire deformation and tire type (normal, radial, etc.) It depends. That is,
Loss due to tire deformation is caused by the fact that when a test vehicle is placed on a dynamo roller, the tires deform more than on a flat road, and as a result, the effective diameter of the tire becomes smaller in every curve. Moreover, the loss due to the type of tire occurs because the work (force) required for deformation differs depending on the type of tire.

<Purpose of the Invention> Based on this knowledge, the present invention is capable of correcting tire loss as well, and when the test vehicle is placed on a dynamo roller, it is possible to apply a load equivalent to actual driving to the test vehicle. The present invention provides a running resistance setting device for a chassis dynamo.

<Structure of the Invention> The running resistance setting device for a chassis dynamo according to the present invention includes a running resistance generator, a dynamo loss corrector, and a tire loss corrector. Set the running resistance characteristics obtained from the characteristics, set the mechanical loss of the dynamo roller measured without the test vehicle on the dynamo loss compensator, and set the mechanical loss of the dynamo roller measured without the test vehicle on the tire loss compensator. The amount of increase in mechanical loss in the state of This is the summary.

An embodiment of the present invention will be described below based on the drawings. <Embodiment> In the drawings, l is a dynamo roller, a power absorption part 2 such as a generator is connected to its shaft, and a flywheel 3 and a speed A sensor 4 and a torque sensor 5 are provided. 6 is a running resistance setting device for setting running resistance obtained from actual road coasting characteristics. Here, the coasting characteristics of an actual road are defined as driving a test vehicle on the road at a certain speed (for example, l
After accelerating to 0%), the generation of driving force is stopped and the vehicle runs using its own inertial energy, and that energy is gradually consumed by running resistance. Therefore, the running resistance obtained from this characteristic is a function of speed. For this reason, the running resistance setting device 6 uses a memory that can store running resistance as a function of speed. 7 is a dynamo loss corrector for setting the mechanical loss of the dynamo, and 8 is a corrector for setting tire loss. Since both dynamo loss and tire loss are functions of speed, it is necessary to use a memory that can store data as a function of speed, similar to the running resistance setting device 6. 9a19b is an interlock switch. When switched to the A side, dynamo loss and tire loss can be set for each corrector 7 and 8. When switched to the B side, the chassis dynamo generates resistance equivalent to the running resistance on the actual road. It can be controlled like this. 10 is a speed setter that sets the speed of the dynamo roller when switched to the switch 9a, 91) iA side, 11 is a comparator, and 12 is the output of the running resistance setter 6 to the output of the dynamo loss corrector 7 and tire loss. A subtraction unit 13 that subtracts the output of the corrector 8 is a comparator that compares the output of the subtraction unit 12 with the detected force of the torque sensor 5. This comparator 13 constitutes a feedback system that controls the output of the subtractor 12 to be equal to the force detected by the torque sensor 5.

Next, a procedure for setting dynamo loss and tire loss using this configuration will be explained. First, switch 9a is turned on with no test vehicle placed on dynamo roller l.

Switch 9b to the A side. Then, the Guina Morola I is operated at a constant speed at the speed set in the speed setting device 10. The torque detected by the torque sensor 5 at this time is nothing but the mechanical loss of the dynamo. Therefore, the set speed of the speed setter IO is increased, for example, every 10 times, and the detected torque at each speed is set in the dynamo loss corrector 7. This allows the mechanical loss of the dynamo to be set.In this case, the detected torque is also input to the tire loss corrector 8,
A subtraction unit 14 is provided on the input side of this corrector, and the subtracted value between the detected torque and the output of the dynamo loss corrector 7 is input to the tire loss corrector 8. There will be no signal input.

After completing the dynamo loss correction, switch 9a,
9b remains switched to the A side, the test vehicle is placed on the dynamo roller, and the dynamo is operated at a constant speed at the speed set by the speed setting device 10 in the same manner as described above. Then, the torque detected by the torque sensor 5 increases compared to the state in which the test vehicle is not mounted. This increase is nothing but tire loss due to the deformation and type of tires on the test vehicle. Therefore, the subtraction unit 14 subtracts the value set in the dynamo loss compensation device 7 from the detected torque to obtain tire loss, and inputs this to the tire loss corrector 8. This is done at each speed by sequentially changing the set speed of the speed setting device IO.

When the setting of dynamo loss and tire loss is completed as described above, the running characteristics obtained from the coasting characteristics of the actual road are set in the running resistance setting device 6, and then the switches 9a and 9b are set to B.
When switched to the side, the amount of power absorbed by the power absorbing section 2 is controlled to a value obtained by subtracting the dynamo loss and tire loss from the amount of running resistance.

From the perspective of the test vehicle, the power absorption load is the sum of the power absorption amount of the power absorption section 2, the mechanical loss of the dynamo, and the tire loss, so its value is equal to the running resistance on the actual road. .

<Effects of the Invention Since the running resistance setting device for a chassis dynamo according to the present invention is configured as described above, it has the following effects0. ■ It is possible to correct tire loss, which has been overlooked in the past, and therefore the running resistance setting device can be adjusted as described above. By simply setting the running resistance calculated from the coasting characteristics of the actual road to the dynamo, it is possible to generate a load on the dynamo equivalent to that on the actual road.

■ Since the tire loss compensator is provided separately from the dynamo loss compensator, if the type of test vehicle changes, only the tire loss compensation need be performed, and the dynamo loss compensation can be used as is. This greatly simplifies the adjustments that must be made each time the test vehicle is changed.

(2) Conversely, if the dynamo roller, flywheel, etc. are converted, only the dynamo loss correction needs to be performed without the tire loss correction, and the adjustment is easy in this case as well.

In addition, in the present invention, a tire loss corrector is provided in addition to the dynamo loss corrector, and the dynamo loss, tie, and loss are set in each corrector for each category. It is also possible to set the characteristics of the sum of the mechanical loss of the dynamo and the tire loss in the loss corrector. In that case, it is not necessary to operate the dynamo at a constant speed without placing the test vehicle on the dynamo roller to measure the dynamo mechanical loss as in the present invention, and instead directly place the test vehicle on the dynamo roller and run the dynamo. All you have to do is drive at a constant speed, measure the sum of dynamo mechanical loss and tire loss, and set it in the dynamo loss corrector.

[Brief explanation of drawings]

The figure shows an embodiment of the present invention. l...Dynamo roller, 2...Power absorption part, 6...
・Running resistance setting device, 7... Dynamo loss corrector, 8.
・・Tire loss corrector. 13

Claims (1)

[Scope of Claims] A running resistance generator, a dynamo loss corrector, and a tightness loss corrector are provided. Set the mechanical loss of the dynamo roller measured without the test vehicle on it, and set the increase in mechanical loss with the test vehicle on the dynamo roller as the tire loss compensator. A running resistance setting device for a chassis dynamo, characterized in that a value obtained by subtracting the output of a dynamo loss compensator and the output of a tire loss compensator from the output of a generator is added to a power absorption section of the dynamo.