JPH0587698A - Testing apparatus of vehicle driving system - Google Patents

Abstract

PURPOSE:To maintain the inertia of a driving shaft to be low while simulating faithfully the vibration of the shaft of a multi-cylinder engine and the vibration of the shaft from the low-speed rotation to the high-speed rotation without affecting the inertia in a vehicle driving system testing apparatus having a driving means of the low inertia simulating the engine. CONSTITUTION:In the shaft driving system testing apparatus, an automatic gearshift 3 is coupled between a direct current motor 1 and a dynamo 22. The efficiency of the vehicle driving system is tested by controlling the direct current motor 1 through simulation of the engine. A low inertia driving means the rotating inertia of which is restricted to be as low as the engine is used as the direct current motor 1. A vibrator 4 to add the rotating vibration is set at the mounting part of the automatic geatshift 3 or the automatic gearshift 3. A swaying device 6 is arranged between an output shaft 23 of the direct current motor 1 and a mounting plate 5 of a test sample so as to shut the transmission of the vibration input of the vibrator 4 to the driving shaft.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle drive system test apparatus for equivalently simulating a drive system of an automobile to test the performance of an automatic transmission or the like.

[0002]

2. Description of the Related Art Conventionally, as a vehicle drive system test apparatus, for example, an apparatus described in Japanese Patent Application Laid-Open No. 61-86631 has been known.

In this prior art publication, an electric motor is used in place of the engine actually mounted on the vehicle, and a performance test (a durability test, a shift transient characteristic test, etc.) of the transmission is performed by combining the electric motor with a transmission as a test piece. ) Is shown.

[0004]

However, in this conventional device, since only the electric motor is used as the drive source instead of the engine, the rotational inertia is very large,
Unlike an engine in which the transient response when changing the rotational speed has a small rotational inertia, there is a problem that a simulation test such as a shift transient characteristic test cannot be performed well.

Therefore, the present applicant previously proposed a device in which an electric motor and a speed increasing gear are combined in order to keep the rotational inertia of the drive system as low as the engine.

However, in this prior apparatus, when simulating engine shaft vibration, vibration is applied to the sample by a rotary vibration generator. In this case, the vibration generator is used as the output shaft system of the speed increaser. If installed directly, the shaker becomes a mass body,
The rotational inertia of the drive system increases, and it becomes meaningless to keep the rotational inertia of the drive system as low as the engine.

The present invention has been made by paying attention to the above-mentioned problems, and in a vehicle drive system test apparatus having a low inertia drive means simulating an engine, a multi-cylinder engine and a low-speed to high-speed engine are used. The object is to maintain the inertia of the drive system to be low without affecting the inertia of the drive system while faithfully simulating engine shaft vibration.

[0008]

In order to solve the above-mentioned problems, the vehicle drive system test apparatus of the present invention uses, as the drive means, low-inertia drive means whose rotational inertia is suppressed to a low level, which is equivalent to that of the engine. A shaker is provided on the specimen mounting portion or the specimen, and a swinging mechanism is provided between the drive shaft of the driving means and the specimen mounting portion.

That is, there is provided drive means that is installed on the drive side to simulate the drive engine, and drive absorption means that is installed on the absorption side to simulate the vehicle load, and between the drive means and the drive absorption means. In a vehicle drive system test device in which a vehicle drive system performance test is performed by connecting a test piece to a vehicle and controlling the drive means to perform engine simulation drive control, as the drive means, the rotational inertia is suppressed to a low level equivalent to that of an engine. A low-inertia drive means is used to provide a vibration exciter for imparting rotational vibration to the mounting portion of the specimen or the specimen, and a vibration input by the exciter is provided between the drive shaft of the driving means and the specimen mounting portion. It is characterized in that a swinging mechanism for cutting off drive shaft side transmission is provided.

[0010]

[Operation] When performing engine simulation drive control,
By giving predetermined test input information such as throttle opening information to the drive means, a drive control command is output in accordance with this input information, the drive means is drive-controlled, and at the same time, when the engine shaft vibration is simulated, a shaker is used. Is output by outputting a vibration drive command to the.

At this time, the rotational vibration by the vibration exciter is applied to the test piece directly or through the mounting portion to simulate the engine shaft vibration in the multi-cylinder engine and the high rotation range. However, vibration can be given with good response.

On the other hand, with respect to the driving means, transmission of vibration input on the drive shaft side is interrupted by a swinging mechanism provided between the drive shaft of the driving means and the specimen mounting portion, and this swinging mechanism serves the purpose. The sample mounting part and the vibration exciter do not weigh on the drive side.
That is, it does not affect the inertia of the low inertia drive means whose rotational inertia is suppressed to the same level as that of the engine.

[0013]

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

First, the structure will be described.

As shown in FIG. 1, a transmission drive test apparatus (an example of a vehicle drive system test apparatus) of a transmission according to the embodiment simulates an engine and is installed on a drive side of a DC motor 1 and a speed increaser 2.
Specimen mounting plate 5 (specimen mounting portion) for mounting the (low inertia drive means) and the housing of the automatic transmission 3 (specimen)
And a swing device 6 (swing mechanism) fixed to the specimen mounting plate 5, and an automatic transmission supported by the housing by swinging the specimen mounting plate 5 and the housing in the rotation direction of the drive shaft. A shaker 4 that indirectly vibrates the input shaft of the machine 3, and a flywheel 21 and a dynamo 22 (which are installed on the output side of the automatic transmission 3 that is the absorption side by simulating vehicle inertia and running resistance). Drive absorption means).

The speed-increasing gear 2 speeds up the rotation of the DC motor 1 by a speed-increasing mechanism using a helical gear, and its speed-increasing ratio is set to about 10 in order to make the rotational inertia equal to that of the engine. Incidentally, if the speed increasing ratio is too small, it is not possible to expect a sufficient reduction of the rotational inertia, and if it is too large, the physique of the DC motor becomes large. Therefore, a practically appropriate speed increasing ratio range is about 6 to 20. .. And the output shaft 2 of the speed increaser 2
3, a drive side rotation sensor 7 and a drive side torque sensor 8 are provided, an input side shaft of the flywheel 21 is provided with an absorption side torque sensor 9, and a motor shaft of the dynamo 22 is provided with an absorption side. A rotation speed sensor 10 is provided.

An automatic transmission control unit 20 is connected to the automatic transmission 3, and it is necessary to give input information to the automatic transmission control unit 20 in the same manner as an actual vehicle when performing a performance test of the automatic transmission. Therefore, throttle opening degree related information (including kickdown information and idle information) is given from the throttle opening degree setter 11, engine speed information is given from the drive side rotation sensor 7, and vehicle speed information is given to the absorption side rotation speed sensor 10. Is given from.

An engine simulation drive control system is connected to the DC motor 1 and the vibrator 4, and this system includes a throttle opening setting device 11 and
It is composed of a changeover switch 12, a manual delay setting device 13, an engine characteristic simulation control unit 14, a data unit 15, a terminal device 16, a printer 17, and an electric motor / exciter drive control unit 18.

The throttle opening degree setting device 11 outputs a throttle opening degree equivalent signal (θ) by manual or automatic operation so as to correspond to the accelerator operation of the engine.

The change-over switch 12 sends a throttle opening degree equivalent signal (θ) to the flow of operation which passes through the engine characteristic simulation control step so as to perform automatic control without passing through the manual function setting device 13. Throttle opening equivalent signal (θ) in which a time function is added to the flow of operation bypassing the engine characteristic simulation control step after passing through the manual function setter 13.
Is a means for switching whether or not to directly send the.

The manual function setting device 13 has a built-in delay circuit for manually setting a time function of the response delay of the engine output in response to an actual accelerator operation in the engine.

As shown in FIG. 2, the engine characteristic simulation control unit 14 includes an electric motor controller 14a for performing engine characteristic simulation control for matching the actual engine transient characteristic with respect to the change in the throttle opening equivalent signal (θ). , The drive-side rotation speed signal (N _IN ) and the drive-side input torque signal (T _IN ) are input, and shaft vibration control is performed to quickly match the engine drive shaft vibration with respect to changes in the rotation speed of the drive shaft 23. This is an electronic control circuit configuration mainly composed of a microcomputer having an exciter control section 14b and the like.

The data unit 15 incorporates data having a matrix of frequency / amplitude with the input rotational speed as a parameter.

The terminal device 16 is capable of adding, changing, deleting, and newly creating the matrix data incorporated in the data unit 15, and is performing a test in the simulated test device. As test data information, in addition to the drive side rotation speed signal (N _IN ) and throttle opening equivalent signal (θ), absorption side rotation speed signal (N _OUT ), drive side input torque signal (T _IN ), absorption side output torque Signal (T
It is possible to monitor the select position signal and the shift position signal from _OUT ) and the automatic transmission control unit 20.

The printer 17 records the input / output status of test data as the test status.

The electric motor drive control unit 18 includes an electric motor drive control unit 18a for converting into a direct current I _T according to an electric motor control command T ^* output from the electric motor control unit 14a.
And an exciter drive controller 18b for converting into an exciter current I _S according to an exciter control command V ^* output from the exciter controller 14b.

As shown in FIGS. 3 to 7, the vibration exciter 4 is provided to give a rotational vibration to the specimen mounting plate 5 on which the automatic transmission 3 is mounted, and the outer peripheral portion of the specimen mounting plate 5 is provided. The vibrating input plate portion 5a protrudingly formed on the upper surface and the vibrating lot 4a provided on the vibrating machine 4 are connected by the through bolt 24, and the vibrating input is applied to the center of the automatic transmission 3 which is the sample. It is applied to P in a tangential direction.

The rocking device 6 includes the output shaft 23 of the speed increaser 2.
8 is provided to block the transmission of the vibration input by the vibrator 4 to the output shaft 23 side between the test piece mounting plate 5 and the test piece mounting plate 5, and the swing structure of the connecting portion with the output shaft 23 is shown in FIG. As shown in FIG. 7, a swinging outer cylinder 6b fixed to the swinging end plate 6a, and a swinging inner cylinder 6c arranged between the swinging outer cylinder 6b and the output shaft 23.
A vibration bearing 6d arranged between the swinging outer cylinder 6b and the swinging inner cylinder 6c, and a rotation bearing 6e arranged between the swinging inner cylinder 6c and the output shaft 23. Is configured.

The seal of this swing structure includes a mechanical seal portion 6f between the output shaft 23 and the swing inner cylinder 6c, and a mechanical seal portion 6g between the output shaft 23 and the swing outer cylinder 6b.
And a lip seal 6h between the swinging outer cylinder 6b and the swinging inner cylinder 6c.
Secured by.

Next, the operation will be described.

When performing engine simulation drive control, given test input information such as throttle opening information to the DC motor 1, a drive control command is output according to this input information, and the DC motor 1 is drive-controlled. Simultaneously, when simulating engine shaft vibration, it is performed by outputting a vibration drive command to the vibration generator 4.

At this time, the rotational vibration by the vibration exciter 4 is given to the automatic transmission 3 via the specimen mounting plate 5, and only the vibration component of the engine torque is separated and given. Even in the case of simulating a multi-cylinder engine and engine shaft vibration from low rotation speed to high rotation speed, vibration can be given with good response.

On the other hand, the rotational vibration generated by the vibration exciter 4 is transmitted to the DC motor 1 by the oscillating device 6 provided between the output shaft 23 and the specimen mounting plate 5 on the drive shaft side. Is cut off.

That is, the vibration input of the specimen mounting plate 5 is not transmitted to the inner race due to the relative rotation allowed by the vibration bearing 6d, and the rotation of the output shaft 23 is allowed the relative rotation by the rotation bearing 6e. As a result, it is not transmitted to the outer race, and the swinging inner cylinder 6c is kept stationary.

Therefore, the swinging device 6 does not cause the specimen mounting plate 5 and the vibrator 4 to have a mass on the driving side, and the speed increasing gear 2 keeps the rotational inertia low like the engine. Does not affect the inertia of.

As described above, the transmission drive test apparatus of the embodiment has the effects listed below.

The output shaft 23 of the speed increaser 2 and the automatic transmission 3
Since the rocking device 6 is provided between the housing and the sample mounting plate 5 for mounting the housing, the mass of the sample mounting plate 5 and the like does not act as the mass of the output shaft 23. And does not affect the input inertia of the drive side.

Since the housing of the automatic transmission 3 is fixed to the specimen mounting plate 5 and the vibration is applied to the specimen mounting plate 5 by the vibrator 4, engine drive shaft vibration and housing of the automatic transmission 3 are provided. It is possible to apply the vibration input to the same as the actual vehicle.

When simulating the engine drive shaft vibration, only the vibration component is separated, and the vibration corresponding to this vibration component is applied to the input shaft of the automatic transmission 3 by the vibration exciter 4. Even in the test simulating the high rotation range of 1, the engine drive shaft vibration can be applied to the input shaft of the automatic transmission 3 without a response delay.

That is, in simulating the shaft vibration, the steady component of the driving torque is obtained by the electric motor 1 and only the vibration component is separated to be placed in a position close to the automatic transmission 3 which is the specimen. By giving the value by 4, the axial vibration is applied with good responsiveness.

Although the embodiment has been described with reference to the drawings, the specific structure is not limited to this embodiment. For example, in the embodiment, an example is shown in which the automatic transmission, which is the test piece, is indirectly provided with the vibration exciter via the test piece mounting plate, but the test piece may be directly provided with the vibration exciter. ..
Further, the specific structure of the swing mechanism is not limited to the embodiment.

[0042]

As described above, according to the present invention, in the vehicle drive system test apparatus having the drive means simulating the drive engine, the drive means has the same low rotational inertia as that of the engine. In addition to using the inertial drive means, the vibration exciter is provided on the specimen mounting portion or the specimen, and the swing mechanism is provided between the drive shaft of the driving means and the specimen mounting portion. The effect that the inertia of the drive system can be kept low without affecting the inertia of the drive system while faithfully simulating the engine shaft vibration in the high rotation range is obtained.

[Brief description of drawings]

FIG. 1 is an overall system diagram showing a drive test apparatus for a transmission according to an embodiment of the present invention.

FIG. 2 is a main part diagram of a control system showing a vibrating machine control system and an electric motor control system of the embodiment apparatus.

FIG. 3 is a front view showing a specimen mounting portion in the apparatus of the embodiment.

FIG. 4 is a side view showing a specimen mounting portion in the apparatus of the embodiment.

FIG. 5 is an enlarged view showing a specimen mounting plate connecting portion of the vibration exciter.

FIG. 6 is a view on arrow in FIG. 5A.

FIG. 7 is a view on arrow in FIG. 5B.

FIG. 8 is a vertical cross-sectional view showing the structure of the connecting portion of the rocking device.

[Explanation of symbols]

 1 DC motor 2 Speed increaser 3 Automatic transmission (specimen) 4 Vibration machine 5 Specimen mounting plate (specimen mounting part) 6 Oscillating device (oscillating mechanism) 23 Output shaft (driving shaft)

Claims (1)

[Claims] 1. A drive means, which simulates a drive engine and is installed on the drive side, and a drive absorption means, which simulates a vehicle load and is installed on the absorption side, between the drive means and the drive absorption means. In a vehicle drive system test device, which is configured to perform a vehicle drive system performance test by connecting a test piece to the vehicle and controlling the drive means to perform an engine simulation drive control, the drive unit has a low rotational inertia as low as an engine. A low-inertia drive means is used to provide a vibration exciter for imparting rotational vibration to the mounting portion of the specimen or the specimen, and the vibration input by the exciter is provided between the drive shaft of the driving means and the specimen mounting portion. A vehicle drive system test apparatus comprising a swinging mechanism that shuts off drive shaft side transmission.