JP3019986B2 - Vehicle drive system test equipment - Google Patents

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 testing apparatus for performing a performance test of an automatic transmission or the like by equivalently simulating the drive system of an automobile.

[0002]

2. Description of the Related Art Conventionally, as a vehicle drive train test apparatus, for example, an apparatus described in Japanese Patent Application Laid-Open No. 61-86631 is known. This conventional publication discloses an apparatus that uses a motor in place of an engine actually mounted on a vehicle and performs a performance test (durability test, shift transient characteristic test, etc.) of the transmission by combining the motor and the transmission. I have.

[0003]

However, in this conventional apparatus, when trying to simulate engine drive shaft vibration having a vibration component, a pulsation signal of variable frequency and amplitude is superimposed on the drive command signal of the electric motor. Therefore, it is difficult to simulate the shaft vibration generated in the multi-cylinder engine or the engine drive shaft in the high rotation range of the engine with the motor shaft and to apply the vibration to the input shaft of the specimen.

When a pulsation signal whose frequency is made variable by the detected rotation signal of the motor shaft is superimposed on the drive command signal, the control loop includes a motor shaft rotation sensor → a motor drive controller → a motor → a motor. Axis
When the motor is included in the control loop, the control response is delayed due to the influence of the inertia of the motor. The effect of this response delay is noticeable in multi-cylinder engines where the vibration frequency is high or in the high engine speed range, and even when trying to simulate engine shaft vibration in the high vibration frequency range, the shaft vibration of the motor shaft is smoothed Will be done.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and has been developed in a vehicle driving system test apparatus having a driving means simulating a driving engine, in which a test simulating a multi-cylinder engine or a high engine revolution range is performed. It is another object of the present invention to provide an engine drive shaft vibration to an input shaft of a specimen without a response delay.

[0006]

In order to solve the above-mentioned problems, a vehicle drive system test apparatus according to the present invention separates only a vibration component when simulating engine drive shaft vibration, and applies a vibration corresponding to the vibration component. This was used as a means for applying to the input shaft of the specimen by a shaker.

That is, as shown in the claim correspondence diagram of FIG. 1, a drive means a provided on the drive side to simulate a drive engine and a drive absorption means b provided on the absorption side to simulate a vehicle load. A vehicle driving system test apparatus in which a specimen c is connected between the driving unit a and the driving absorbing unit b, and a vehicle driving system performance test is performed by controlling the driving unit a by engine simulation driving. , A vibrator d for directly or indirectly applying vibration to the input shaft of the specimen c, a drive shaft rotation detecting means e for detecting the drive-side shaft rotation, and a vibration corresponding to the drive shaft rotation of the engine to be simulated. Drive shaft vibration data f whose frequency and amplitude are set in advance
And a drive shaft rotation detection value from the drive shaft rotation detection means e, and outputs a control command to simulate engine drive shaft vibration to the vibrator d based on comparison with the drive shaft vibration data f. And vibrator control means g.

[0008]

[Function] When performing engine simulation drive control,
By providing predetermined test input information such as throttle opening information to the drive means a, a drive control command is output in accordance with the input information, and the drive means a is drive-controlled.

At the time of this drive control, engine drive shaft vibration is simulated.
, A drive shaft rotation detection value input from the drive shaft rotation detection means e for detecting the rotation of the drive side, and a vibration frequency and amplitude corresponding to the drive shaft rotation of the engine to be simulated are set in advance. A control command for simulating engine drive shaft vibration is output to the vibrator d based on comparison with the vibration data f, and vibration is applied directly or indirectly to the input shaft of the specimen c by the vibrator d. It is.

[0010]

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

First, the configuration will be described.

As shown in FIG. 2, a transmission drive test apparatus (an example of a vehicle drive system test apparatus) of a first embodiment includes a DC motor 1 and a speed-increasing gear 2 installed on the drive side by simulating an engine.
(Drive means), a specimen mounting plate 5 for mounting a housing of the automatic transmission 3 (specimen), a swinging device 6 fixed to the specimen mounting plate 5, and the specimen mounting plate 5 and the housing. A vibration exciter 4 that indirectly vibrates the input shaft of the automatic transmission 3 supported by the housing by swinging in the rotational direction of the drive shaft, and an absorption side that simulates vehicle inertia and running resistance. A flywheel 21 and a dynamo 22 (drive absorbing means) are provided on the output side of the automatic transmission 3.

The speed-increasing gear 2 increases the rotational speed 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.

If the speed increase ratio is too small, a sufficient decrease in the rotational inertia cannot be expected. If the speed increase ratio is too large, the size of the DC motor becomes large. Therefore, a practically appropriate speed increase ratio range is 6 to 20. It is about.

The output shaft 23 of the gearbox 2 is provided with a drive side rotation sensor 7 (drive shaft rotation detecting means) and a drive side torque sensor 8 (drive shaft torque detecting means). Is provided with an absorption-side torque sensor 9, and the motor shaft of the dynamo 22 is provided with an absorption-side rotational speed sensor 10.

An automatic transmission control unit 20 is connected to the automatic transmission 3, and when performing a performance test of the automatic transmission, it is necessary to supply input information to the automatic transmission control unit 20 in the same manner as an actual vehicle. The throttle opening related information (including kickdown information and idle information) is provided from the throttle opening setting device 11, the engine speed information is provided from the drive side rotation sensor 7, and the vehicle speed information is provided from 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 the system includes a throttle opening degree setting device 11,
It comprises a changeover switch 12, a manual delay setting unit 13, an engine characteristic simulation control unit 14, a data unit 15, a terminal device 16, a printer 17, and a motor / vibrator drive control unit 18.

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

The changeover switch 12 sends a throttle opening degree equivalent signal (θ) to the flow of operation after the engine characteristic simulation control step to perform automatic control without causing the manual function setting unit 13 to elapse. This is a means for switching, as necessary, whether or not the throttle opening degree equivalent signal (θ) with a delay in the flow of operation bypassing the engine characteristic simulation control step by passing the manual function setting unit 13 is delayed. .

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

As shown in FIG. 3, the engine characteristic simulation control unit 14 performs an engine characteristic simulation control for causing a change in the throttle opening equivalent signal (θ) to coincide with an actual engine transient characteristic. The drive-side rotational 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 a change in the rotational speed of the drive shaft 23. This is an electronic control circuit configuration mainly using a microcomputer having a vibrator control unit 14b and the like.

The data unit 15 incorporates data in which the frequency and amplitude are matrixed with the input and set rotational speed as a parameter.

In the terminal device 16, it is possible to add, change, delete and newly create matrix data incorporated in the data unit 15, and to perform a test with the simulation test device. As test data information, besides the drive side rotation speed signal (N _IN ) and the throttle opening equivalent signal (θ), the absorption side rotation speed signal (N _OUT ), drive side input torque signal (T _IN ), absorption side output torque Signal (T
_OUT ) and a select position signal and a shift position signal from the automatic transmission control unit 20 can be monitored.

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

[0025] The electric motor drive control unit 18, the motor drive control unit 18a for converting the direct current I _T in accordance with the motor control command T ^* that is output from the motor control unit 14a
And a shaker drive control unit 18b that converts the shaker current into an exciting current I _S according to a shaker control command V ^* output from the shaker control unit 14b.

As shown in FIG. 4, the vibrator 4 is connected to a specimen mounting plate 5 via a vibration lot 4a, and the vibration input is tangential to the center P of the drive shaft. To be given.

Next, the operation will be described.

FIG. 5 is a flowchart showing the flow of the exciter control operation performed by the exciter controller 14b, and FIG. 6 is a flowchart showing the flow of the operation correction of the vibration torque.

In steps 40 and 41, the driving-side rotational speed signal (N _IN ) and the driving-side input torque signal
Read (T _IN ).

In step 42, the detection data of the rotation speed & torque vibration frequency and the detection data of the rotation speed & torque vibration frequency obtained from the read drive side rotation speed signal (N _IN ) and drive side input torque signal (T _IN ). A comparison process with the target data is performed.

As the target data of the rotation speed and the torque vibration frequency, characteristic data of the rotation speed and the torque vibration are set (step 30), and the target data of the rotation speed and the torque vibration frequency are generated based on the characteristic data. (Step 3
1).

In step 43, it is compared whether or not the detected data matches the target data. If they do not match, the process proceeds to step 44, where the calculation of the vibrator control command is corrected according to the flowchart of FIG. .

That is, the torque vibration frequency detection data T ₁ is subtracted from the torque vibration frequency target data T _0, and the difference T ₂
The calculated (step 50), and correct the determined the difference T ₂ is whether positive (step 51), the command torque vibration frequency if the difference between T ₂ is a positive number (T ₁ + T ₂₎ (Step 5
2), the difference between T ₂ to modify the command torque vibration frequency to be a positive number in (T ₁ -T ₂₎ (step 53).

In step 45, if the detected data coincides in step 43, the data is used as a vibrator control command. If the data does not match in step 43, the data corrected in step 44 is used as a vibrator control command. Performs signal conversion processing.

In step 46, the exciter control command V ^* subjected to the signal conversion processing in step 45 is output.

As described above, in the transmission drive test apparatus of the embodiment, the following effects can be obtained.

In simulating engine drive shaft vibration, only a vibration component is separated, and a vibration corresponding to this vibration component is applied to the input shaft of the automatic transmission 3 by the vibrator 4. The engine drive shaft vibration can be applied to the input shaft of the automatic transmission 3 with no response delay even in the test simulating the high rotation range.

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 at a position close to the automatic transmission 3 which is the specimen. 4, the vibration is applied with good responsiveness.

Since the drive shaft torque information is used as feedback information in simulating engine drive shaft vibration, the responsiveness of the shaft vibration frequency and amplitude is higher than when simulating shaft vibration using only input shaft rotation as input information. And high simulation accuracy is achieved.

The output shaft 23 of the gearbox 2 and the automatic transmission 3
Since the swinging device 6 is provided between the sample mounting plate 5 and the sample mounting plate 5 to which the housing is attached, the swinging device 6 acts as the mass of the output shaft 23 despite the addition of a mass such as the sample mounting plate 5. And does not affect the drive-side input inertia.

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, the engine drive shaft vibration and the housing of the automatic transmission 3 are provided. Can be applied to the vehicle in the same manner as an actual vehicle.

Although the embodiment has been described with reference to the drawings, the specific configuration is not limited to this embodiment. For example, in the embodiment, the example in which the exciter is provided indirectly via the specimen mounting plate in the automatic transmission as the specimen is shown, but the vibrator may be provided directly on the specimen. .

[0043]

As described above, according to the present invention, in a vehicle driving system test apparatus having driving means simulating a driving engine, only a vibration component is separated when simulating engine driving shaft vibration. Since the vibration corresponding to this vibration component was applied to the input shaft of the specimen by a vibrator, even in tests simulating a multi-cylinder engine or a high rotation range of the engine, the vibration of the engine drive shaft was reduced without response delay. The effect that it can be given to the input shaft is obtained.

[Brief description of the drawings]

FIG. 1 is a view corresponding to a claim showing a vehicle drive system test apparatus according to the present invention.

FIG. 2 is an overall system diagram showing a transmission drive test apparatus according to an embodiment.

FIG. 3 is a main view of a control system showing a vibrator control system and an electric motor control system of the embodiment apparatus.

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

FIG. 5 is a flowchart showing a flow of a shaker control operation.

FIG. 6 is a flowchart showing a flow of a shaker control command calculation correction.

[Explanation of symbols]

 a drive means b drive absorption means c specimen d vibrator e drive shaft rotation detecting means f drive shaft vibration data g vibrator control means

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G01M 17/00-17/007 G01M 13/02 G01M 7/00

Claims (2)

(57) [Claims] 1. A driving means provided on a driving side to simulate a driving engine, and a driving absorbing means provided on an absorbing side to simulate a vehicle load, wherein a driving means is provided between the driving means and the driving absorbing means. A vehicle driving system test apparatus in which a vehicle is connected to a vehicle and the driving means is subjected to engine simulation drive control to perform a vehicle driving system performance test. A drive shaft rotation detecting means for detecting drive-side shaft rotation; drive shaft vibration data in which a vibration frequency and amplitude corresponding to a drive shaft rotation of a simulated engine are set in advance; and the drive shaft rotation. Exciter control means for receiving a drive shaft rotation detection value from the detection means and outputting a control command to simulate engine drive shaft vibration based on a comparison with the drive shaft vibration data to the shaker, Vehicle powertrain testing apparatus characterized in that it comprises. 2. The vibrator control means uses the actual vibration frequency and amplitude obtained from the detected drive shaft torque value from the drive shaft torque detection means for detecting the drive side shaft torque as feedback information, A vehicle drive system test apparatus, comprising: means for outputting a control command that matches a target vibration frequency and amplitude obtained from a rotation detection value and drive shaft vibration data to the vibrator.