JPH0674951U - Engine dynamometer device - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide an engine dynamometer device capable of preventing a rapid change in the load on the engine dynamometer and the engine at the time of switching the mode of the engine dynamometer and smoothly switching the modes. [Configuration] The manual operation panel 3 is provided with a setting dial for dynamo speed control and setting dials 9 and 10 for dynamo torque control exclusively, and an output set by these setting dials 9 and 10 is selected. The setting output changeover switch 13 for supplying to the dynamo controller 2 is provided.
And a mode selector switch 7 that outputs a mode setting signal
It is configured to switch in conjunction with.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an engine dynamometer device.

[0002]

[Prior art]

 In an engine dynamometer device for checking the performance of an engine such as an automobile, an engine dynamometer is controlled by sending a dynamo speed control signal and a dynamo torque control signal from a manual operation panel to a dynamo controller that controls the engine dynamo meter. It controls the meter.

That is, in this type of engine dynamometer device, the dynamo speed control (ASR) and the dynamo torque control (ATR) make the dynamo speed and dynamo torque constant, respectively, and the speed and torque in the engine dynamo meter are controlled. Have control. In order to perform this control, the conventional engine dynamometer device is configured as shown in FIG.

In FIG. 2, reference numeral 1 is an eddy dynamo that uses, for example, a coil as an engine dynamo meter mechanically connected to an engine (not shown), and 2 is a dynamo controller that controls the eddy dynamo 1. Although not shown in detail, the engine dynamometer 1 is provided with a speed sensor and a torque sensor, and the detection outputs from these sensors are sent to the dynamo controller 2.

Reference numeral 3 is a manual operation panel for setting a dynamo speed control signal and a dynamo torque control signal to the dynamo controller 2, and two mode setting keys 4, 5 for setting a dynamo speed control mode or a dynamo torque control mode. And a setting dial 6 for setting the control voltage. Reference numeral 7 denotes a changeover switch which is changed over to the mode setting keys 4 and 5 by an ON operation, and is composed of contacts 7A and 7B in the dynamo speed control mode and dynamo torque control mode and a switching piece 7C. Reference numeral 8 denotes a variable power source, which is configured to output a large signal as a set voltage when the setting dial 6 is rotated in the arrow direction, for example.

In the engine dynamometer device having the above structure, the mode setting key 4 is turned on when the dynamo speed control is performed. This closes the contact 7A, and the dynamo controller 2 enters the dynamo speed control mode. In this state, rotating the setting dial 6 in the direction of the arrow will increase the setting voltage, and the rotation of the engine dynamometer 1 will increase (increase), and rotating in the direction opposite to the arrow will decrease the setting voltage. Thus, the rotation of the engine dynamometer 1 decreases (decreases). On the other hand, when the dynamometer control is performed, the mode setting key 5 is turned on. As a result, the contact 7B is closed and the dynamo controller 2 enters the dynamo torque control mode. In this state, rotating the setting dial 6 in the direction of the arrow will increase the setting voltage and decrease the rotation of the engine dynamometer 1, and rotating it in the direction opposite to the arrow will decrease the setting voltage and decrease the engine dynamo. The rotation of the meter 1 increases. Table 1 below is a simple representation of the above operation.

[0007]

[Table 1]

[0008]

[Problems to be solved by the device]

 As can be understood from the above description and Table 1, the operation direction of the setting dial 6 is opposite between the dynamo speed control and the dynamo torque control in the engine dynamo meter device. In the above-described conventional engine dynamometer device, the engine dynamometer 1 is controlled by the two mode setting keys 4 and 5 and the one setting dial 6. Therefore, the conventional engine dynamometer device has the following disadvantages.

For example, in the no-load state in the dynamo speed control mode, when the mode is suddenly switched to the dynamo torque control, the setting dial 6 is common to both modes, so that some load is abruptly applied to the engine dynamometer 1. As a result, the engine dynamometer 1 and the engine mechanically connected to the engine dynamometer 1 may be adversely affected.

The present invention has been made in consideration of the above matters, and an object of the present invention is to prevent a sudden change in the load on the engine dynamometer and the engine at the time of mode switching of the engine dynamometer, and to perform the mode switching. An object is to provide an engine dynamometer device that can perform smoothly.

[0011]

[Means for Solving the Problems]

 In order to achieve the above object, the engine dynamometer device according to the present invention is provided with a setting dial for dynamo speed control and a setting dial for dynamo torque control exclusively on a manual operation panel. A setting output changeover switch is provided to selectively supply the set output to the dynamo controller.The setting output changeover switch and the mode changeover switch for outputting the mode setting signal are linked together. It is configured to switch.

[0012]

[Action]

 In the engine dynamometer device with the above configuration, for example, when the mode is changed from dynamo speed control to dynamo torque control, the torque in the engine dynamometer at that time is read, and the load state is reflected on the torque setting dial. By switching the mode, it is possible to prevent sudden load changes in the engine dynamometer and the engine mechanically connected to the engine dynamometer.

[0013]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 schematically shows the configuration of an engine dynamometer device according to the present invention. In this figure, the same reference numerals as those in FIG. 2 indicate the same or equivalent parts.

In FIG. 1, reference numerals 9 and 10 denote setting dials for dynamo speed control and setting dials for dynamo torque control provided on the manual operation panel 3. Reference numerals 11 and 12 denote variable power sources for the setting dials 9 and 10, which are configured to output a large signal as a set voltage when the setting dials 9 and 10 are rotated in the arrow directions. The setting voltage of these setting dials 9 and 10 and the control direction of the dynamo follow Table 1 above.

Reference numeral 13 is a setting output changeover switch for selectively supplying the output set by the setting dials 9 and 10 to the dynamo controller 2, and includes a contact 13A connected to the variable power supply 11 and a variable power supply. It is composed of a contact point 13B connected to 12 and a switching piece 13C, and is configured to interlock with the mode changeover switch 7.

In the engine dynamometer device configured as described above, for example, when performing dynamo speed control, the mode setting key 4 is turned on. As a result, the contact 7A is turned on in the mode changeover switch 7, the dynamo controller 2 is set to the dynamo speed control mode, and the contact 13A is turned on in the set output changeover switch 13. In this state, turning the setting dial 9 in the direction of the arrow will increase the set voltage, which can increase the rotation of the engine dynamometer 1, and rotating it in the direction opposite to the arrow will decrease the set voltage. The rotation of the engine dynamometer 1 can be reduced.

When switching to the dynamo torque control while the dynamo speed control is being performed, first, the current torque of the engine dynamometer 1 is read. For example, when the torque at this time is large, the output from the torque setting dial 10 is set to be large to match it, and then the mode setting key 5 is turned on so that the dynamo controller 2 controls the dynamo speed. The mode is switched to the dynamo torque control mode. By doing so, it is possible to prevent a sudden load change in the engine dynamometer 1 and the engine mechanically connected to the engine dynamometer 1, and it is possible to smoothly switch the control modes.

It goes without saying that the control mode can be smoothly switched by similarly performing the switching from the dynamo torque control mode to the dynamo speed control mode.

[0020]

[Effect of device]

 As described above, according to the present invention, the setting dials for controlling the engine dynamometer 1 are provided for the dynamo speed control mode and the dynamo torque control, respectively. Since the setting dial is configured to be effective, it is possible to prevent rapid changes in the load on the engine dynamometer and the engine when switching the mode of the engine dynamometer, and to perform mode switching smoothly.

[Brief description of drawings]

FIG. 1 is a diagram schematically showing a configuration of an engine dynamometer device according to the present invention.

FIG. 2 is a diagram schematically showing a configuration of a conventional engine dynamometer device.

[Explanation of symbols]

1 ... Engine dynamometer, 2 ... Dynamo controller, 3 ... Manual operation panel, 7 ... Mode change switch, 9,
10 ... Setting dial, 13 ... Setting output selector switch.

Claims (1)

[Scope of utility model registration request] 1. An engine dynamometer device in which a mode setting signal and a set voltage are sent from a manual operation panel to a dynamo controller for controlling an engine dynamometer, wherein the setting for dynamometer speed control is provided on the manual operation panel. The dial and the setting dial for the dynamo torque control are exclusively provided, and the setting output changeover switch for selectively supplying the output set by these setting dials to the dynamo controller is provided. An engine dynamometer device characterized in that an output changeover switch and a mode changeover switch for outputting the mode setting signal are configured to be interlocked with each other to be changed over.