KR20170022493A - Test equipment for measuring durability reliability of cvvt system - Google Patents

Test equipment for measuring durability reliability of cvvt system Download PDF

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Publication number
KR20170022493A
KR20170022493A KR1020150117560A KR20150117560A KR20170022493A KR 20170022493 A KR20170022493 A KR 20170022493A KR 1020150117560 A KR1020150117560 A KR 1020150117560A KR 20150117560 A KR20150117560 A KR 20150117560A KR 20170022493 A KR20170022493 A KR 20170022493A
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South Korea
Prior art keywords
cvvt system
cvvt
system sample
temperature chamber
encoder
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KR1020150117560A
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Korean (ko)
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송원곤
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주식회사 현대케피코
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Priority to KR1020150117560A priority Critical patent/KR20170022493A/en
Publication of KR20170022493A publication Critical patent/KR20170022493A/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M15/00—Testing of engines
    • G01M15/02—Details or accessories of testing apparatus
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M15/00—Testing of engines
    • G01M15/04—Testing internal-combustion engines
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D22/00—Control of humidity
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2800/00—Methods of operation using a variable valve timing mechanism
    • F01L2800/18—Testing or simulation

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Testing Of Engines (AREA)

Abstract

The present invention relates to a CVVT system operation durability testing apparatus comprising a closed temperature chamber 100, a CVVT system sample 200 disposed inside the temperature chamber 100, A powder brake 300 which is disposed outside the temperature chamber 100 and applies a load to the CVVT system sample 200 and a powder brake 300 which is disposed outside the temperature chamber 100 and in which a load is applied to the CVVT system sample 200, And an encoder 400 for measuring an angular change of the angle.
The present invention is advantageous in that the construction of the CVVT system operation durability testing apparatus is simple and cost-effective, it can be tested by simulating harsh environmental conditions, and multiple performance verification can be performed at the same time.

Figure P1020150117560

Description

[0001] DESCRIPTION [0002] TEST EQUIPMENT FOR MEASURING DURABILITY RELIABILITY OF CVVT SYSTEM [0003]

The present invention relates to a CVVT system operation durability tester, and more particularly, to an electric CVVT system operation durability tester for verifying the operation performance of an electric CVVT system under various environmental conditions.

 The CVVT system is a device that can change valve timing continuously according to engine speed and engine load, and it is called CVVT as an abbreviation of Continuous Variable Valve Timing.

The engine with the electric CVVT system is effective in the exhaust gas part as well as the output and fuel efficiency improvement.

The products that make up the electric CVVT system must undergo pre-operating performance test under various environmental conditions that may occur when applied to a real vehicle.

1 is a block diagram showing a conventional CVVT system operation durability testing apparatus.

The conventional CVVT system operation durability test apparatus shown in Fig. 1 is a system in which a CVVT system sample 3 is mounted on an engine head assembly 1 and a crankshaft 5 connected to a camshaft 5 and a chain 7, A crankshaft position (CKP) sensor 13 and a camshaft position (CMP) sensor 15 for detecting a phase change, and a separate device for implementing a test apparatus A temperature and humidity chamber 17, and an engine oil lubrication apparatus (not shown), for example.

The servomotor 11 rotates the crankshaft 8 so that the user can reach a desired engine speed RPM.

The crank wheel 9 calculates the engine rotational speed in such a manner that a positive voltage is generated when the wheel teeth approach the sensor (crankshaft position sensor) 13 and a voltage is generated when the wheel teeth moves away from each other, and the rotation of the crankshaft 9 Speed is detected.

The operation of the CVVT system operating endurance testing device is such that the phase of the CVVT system sample 3 is changed to an aimed angle and the phase change of the camshaft 5 is measured by the crankshaft position sensor 13 and the camshaft position sensor 15 It is a method to confirm by matching one signal.

However, since the conventional CVVT system operation durability testing apparatus is tested by mounting one CVVT system sample (3) per engine head assembly (1), the number of samples that can be verified during the test is limited to one, It is necessary to detach the components such as the engine head assembly 1 and the camshaft 5, and then detach and attach the other sample.

In addition, since the large temperature and humidity chamber 17 is used to accommodate the engine head assembly 1, the test temperature and humidity reaching time in the operation verification of the CVVT system sample 3 is large, and the CVVT system sample 3 ) Is mounted inside the engine head 1, it is difficult to confirm whether the CVVT system sample 3 satisfies the corresponding test condition, and since the load condition variable is limited, there is a limitation in verifying the operation performance of the CVVT system in a harsh load condition have.

There is also a prior art related to the CVVT system performance test, which discloses a method for confirming the operating state of a continuous variable valve timing device (Korean Patent Publication No. 2003-0005829, published on Jan. 23, 2003).

However, in the case of the above-described technique, there is a problem that the operation state of the continuous variable valve timing device can be confirmed by measuring the change in the timing within the set range, and there is a limit in verifying the operation performance under various environmental conditions.

It is an object of the present invention to provide a CVVT system operation durability test apparatus capable of reducing the cost by simplifying the test apparatus and verifying the operation performance of the electric CVVT system under various environmental conditions by reducing the temperature chamber.

According to an aspect of the present invention for achieving the above object, the present invention provides a method for testing a CVVT system, including a temperature chamber sealed inside, a CVVT system sample disposed inside the temperature chamber, And an encoder disposed outside the temperature chamber and measuring an angle change of the CVVT system sample under a load applied to the CVVT system.

The CVVT system sample may include a speed reducer, a motor, and an intelligent controller.

The CVVT system sample, the powder brake, and the encoder may be coaxially connected.

A CVVT system sample, a powder brake, and a jig member for fixing the encoder to be coaxially connected.

And a transmitter for converting the angle measured by the encoder and transmitting the current phase to the intelligent controller.

And a temperature and humidity control unit for controlling temperature and humidity inside the temperature chamber.

The present invention is configured so that the engine load can be simulated by the powder brake and the phase change of the CVVT system sample through the encoder with the CVVT system sample interposed in the temperature chamber.

This is simpler in construction than the conventional method of checking the phase angle by matching the crankshaft position (CKP) sensor and the camshaft position (CMP) sensor, and eliminates the need for an engine head assembly, In addition, since only the CVVT system sample can be placed in the temperature chamber, the size of the temperature chamber can be reduced, which makes it possible to implement more severe environmental conditions and does not require much time for performance verification.

In addition, the present invention has the advantage that the performance of several CVVT system samples can be verified at the same time.

Therefore, it is possible to verify the operation performance of the electric CVVT system under various environmental conditions, and the test reliability is improved.

1 is a view showing a conventional CVVT system operation durability testing apparatus.
2 is a schematic view showing a CVVT system operation durability testing apparatus of the present invention.
Figure 3 illustrates the process of testing the CVVT system operational durability using the CVVT system operational durability testing apparatus of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The CVVT system operational endurance test apparatus of the present invention includes a temperature chamber 100, a CVVT system sample 200, a powder brake 300, and an encoder 400, as shown in FIG.

The temperature chamber 100 has a hexahedron shape in which an empty space is formed, and the inside of the temperature chamber 100 is sealed and blocked from the outside. In the temperature chamber 100, the wall surface is formed of an insulating material to prevent changes in the environmental conditions inside.

The CVVT system sample 200 is placed inside the temperature chamber 100 so as to implement various temperature and humidity conditions and to perform operational performance tests. For example, the CVVT system sample 200 is placed in the temperature chamber 100 and can be tested under selected conditions of operating temperature -40 ° C to 150 ° C and relative humidity 0 to 100%.

Since only the CVVT system sample 200 is provided in the temperature chamber 100, the size of the temperature chamber 100 can be reduced and the test temperature and humidity reaching time can be reduced.

A temperature and humidity control unit 110 for controlling temperature and humidity inside the temperature chamber 100 is provided.

The temperature and humidity control unit 110 may have various devices and structures. For example, the temperature and humidity control unit 110 may include an air conditioner for adjusting the temperature inside the temperature chamber 100 by heating or cooling the air existing in the temperature chamber 100, And a dehumidifier for removing the humidity inside the temperature chamber 100. [

The CVVT system sample (200) is a sample for testing the operating performance before applying the CVVT system to a real vehicle.

The CVVT system is a system for continuously varying the opening and closing timing of the intake valve by changing the phase of the intake camshaft according to the engine speed and the load state of the vehicle, that is, a system for changing the valve overlap.

The valve overlap is a section where the intake valve and the exhaust valve are opened at the same time. If the valve overlap increases (advances), the output of the engine can be increased by sucking in sufficient air. If the valve overlap is reduced (retarded), the fuel consumption can be improved by reducing the amount of intake air.

The CVVT system can increase the fuel consumption and the output at the same time by changing the timing value of opening and closing the intake valve according to the load condition of the vehicle.

As shown in FIG. 2, the CVVT system sample 200 includes a speed reducer 210, a motor 220, and an intelligent controller 230. The CVVT system sample 200 has a structure in which the speed reducer 210 and the motor 220 are assembled together and the intelligent controller 230 is attached to the motor 220.

The motor 220 rotates the shaft 500 to be described later. The motor 220 may be a BLDC motor. BLDC (Brush Direct Current) motors are made by combining the advantages of long life and low noise AC motors and high output DC motors among various kinds of DC motors. They are low noise, compact and high output motors.

The decelerator 210 is for realizing a phase change (retard / advance).

The speed reducer 210 may change the phase angle depending on the load transmitted by the shaft 500. The decelerator 210 performs a differential motion in which the biting phase angle is rotated by the difference in the number of gear teeth assembled to the motor 220, thereby realizing the advance angle and the perception angle. The operating angle of the speed reducer 210 is preferably 45 degrees.

The intelligent controller 230 may change the phase angle of the speed reducer 210 by rotating the motor 220 connected to the shaft 500 to rotate the shaft 500 in the forward or reverse direction. The intelligent controller 230 can change the amount of rotation of the motor 220 according to the load state.

The powder brake 300 is for simulating the engine load, and loads the CVVT system sample 200. The powder brake 300 can apply a load to the CVVT system sample 200 without mechanical impact using powder (magnetic powder).

In the powder brake 300, the powder is connected in an annular shape according to the magnetic flux generated by passing a current through the inner coil. At this time, the torque can be transmitted to the shaft by the connection force between the powder and the friction force between the powder and the operation surface.

The powder brake 300 can adjust the intensity of the current applied to the inner coil to form various vehicle load conditions. The powder brake 300 may have a variable DC power supply capable of adjusting the intensity of a current applied to the coil.

In addition, the powder brake 300 may apply a load to the CVVT system sample 200 through the action of stopping the rotation of the shaft 500.

The encoder 400 measures the change in the angle of the CVVT system sample 200 under a load on the CVVT system sample 200. The encoder 400 can calculate the number of pulses generated during rotation and measure the change in angle of the CVVT system sample 200.

The powder brake 300 and the encoder 400 are disposed outside the temperature chamber 100.

The encoder 400 is mounted on the final stage of the shaft 500. The encoder 400 may be mounted on the final stage of the shaft 500 so that a test for sensing the angle of the speed reducer 210 in a state where the load is held can be accurately performed.

The CVVT system sample 200, the powder brake 300, and the encoder 400 are coaxially connected. The powder brake 300 applies a load to the CVVT system sample 200 when the CVVT system sample 200, the powder brake 300 and the encoder 400 are coaxially connected and the angle of the CVVT system sample 200 The encoder 400 can measure the change.

The powder brake 300 and the encoder 400 are coupled to an axis extending from the CVVT system sample 200 so that they can rotate together when the motor 220 rotates.

Specifically, the CVVT system sample 200, the powder brake 300, and the encoder 400 are connected to the shaft 500, and the shaft 500 is provided with a cylindrical bearing 510 for smooth rotation of the shaft 500 Assembled. The shaft 500 corresponds to a camshaft of an actual vehicle that performs an operation of opening and closing an intake valve.

The CVVT system operation durability test apparatus may further include a transfer unit 600. The transmitter 600 converts the angle measured by the encoder 400 and transmits the current phase to the intelligent controller 230.

The transmitting unit 600 may include a data collecting device for collecting angles measured by the encoder 400, a PC for programming and angular conversion, CANBUS for transmitting the current phase to the intelligent controller 230, and the like.

A CVVT system sample 200, a powder brake 300, and a jig member 700 for fixing the encoder 400 to be coaxially connected.

The jig member 700 may support the bearing 510 assembled with the shaft 500, and various shapes may be employed.

Alternatively, a plurality of jig members 700 may be provided to support the shaft 500 so that a plurality of CVVT system samples 200 can be tested and verified at one time.

Hereinafter, the operation of the present invention will be described.

CVVT System Operation The durability test equipment is intended to verify that the CVVT system works well under the selected operating temperature range of -40 ° C to 150 ° C and 0 to 100% relative humidity.

The CVVT system operation durability test apparatus includes a CVVT system sample 200 disposed inside the temperature chamber 100 and a powder brake 300 and an encoder 400 installed outside the temperature chamber 100.

The powder brake 300 and the encoder 400 are connected to the CVVT system sample 200 via the shaft 500 to form a load condition and a severe load condition that are transmitted through the shaft 500, ) Can be carried out.

The encoder 400 is installed at the end of the shaft 500, that is, at the final stage, so that accurate angular variation measurement of the reducer 210 according to the provision of the load is possible. The shaft 500 allows smooth rotation by the bearing 510 assembled on the outer surface.

The powder brake 300 simulates the engine load and the engine load simulated by the powder brake 300 is transmitted to the speed reducer of the CVVT system sample 200 via the shaft 500. As the load is transmitted to the speed reducer 210, an angle change of the speed reducer 210 is performed. The angle of the speed reducer 210 is measured by the encoder 400.

The angle of the decelerator 210 measured by the encoder 400 is converted to the current phase angle of the CVVT system sample 200 through the transmission unit 600 and transmitted to the intelligent controller 230. The intelligent controller 230 controls the operation of the motor 220 according to the load.

The specific test procedure is as follows. The CVVT system sample 200 to be tested is mounted in the temperature chamber 100 as shown in FIG. 3, and then the phase change (retard or advance) of the CVVT system sample 200 is set , And power is applied to operate the CVVT system sample 200.

When the power is applied, the motor 220 of the CVVT system sample 200 is operated and the shaft 500 is rotated. A load is applied by using the powder brake 300 in the course of the rotation of the shaft 500. The load by the powder brake 300 is transmitted to the speed reducer 210 via the shaft 500 and the angle of the speed reducer 210 is changed.

The encoder 400 measures the angle of the speed reducer 210 and transmits the measured angle to the transmission unit 600. The encoder 400 may measure the angle of the CVVT system sample 200 at each set time and transmit the measured angle to the transmitter 600.

The transmitter 600 recognizes angles and loads and converts them into current phase values (digital data) of the CVVT system sample 200 through preset programming and transmits them to the intelligent controller 230 via CANBUS. The intelligent controller 230 can change the angle of the speed reducer 210 by controlling the operation of the motor 220 so that the fuel consumption and the output are simultaneously increased.

It is possible to confirm whether the operation of the motor 220 is controlled according to the load and whether the operation of the CVVT system sample 200 is normally performed with the current phase of the CVVT system sample 200 transmitted from the transmitter 600 to the intelligent controller 230 have.

In the CVVT system operation endurance test apparatus of the present invention, the powder brake 300 simulates the engine load with only the CVVT system sample 200 interposed in the temperature chamber 100, and the CVVT system sample The phase change can be confirmed.

This is achieved by mounting the CVVT system sample 3 on the conventional engine head assembly 1 shown in Fig. 1 and connecting the camshaft 5 and the camshaft 5 to the crankshaft 8 connected to the chain 7, A crankshaft position (CKP) sensor 13 and a camshaft position (CMP) sensor 15 for sensing the phase change, a separate program instrument implementing the test apparatus (for example, The temperature and humidity control unit 19 and the control unit 21), the temperature and humidity chamber 17, and the engine oil lubrication apparatus (not shown). It is possible to implement more harsh environmental conditions and it does not take much time to verify the performance, which is cost effective.

Particularly, since the CVVT system operation durability testing apparatus of the present invention does not require an engine head assembly and a lubrication apparatus for applying a load to a conventional CVVT system sample 200, the configuration of the test apparatus is simple.

Also, the present invention can simplify the programming method for checking the phase difference of the CVVT system sample 200 as compared with the conventional method.

The present invention described above is characterized in that a plurality of jig members 700 are provided in the temperature chamber 100 to support the shaft 500 to mount one CVVT system sample 3 per one of the conventional engine head assemblies 1 It is possible to test and verify a plurality of CVVT system samples 200 at the same time.

In addition, since the temperature chamber can be reduced in size as compared with the prior art, the test temperature and humidity reaching time can be shortened, so that the product performance of the CVVT system sample 200 can be verified under more severe environmental conditions, The reliability of the test can be improved.

The scope of the present invention is not limited to the embodiments described above, but may be defined by the scope of the claims, and those skilled in the art may make various modifications and alterations within the scope of the claims It is self-evident.

1: Engine head assembly 3: CVVT system sample
5: camshaft 7: chain
8,9: crankshaft, crank wheel 11: servo motor
13: crankshaft position sensor 15: camshaft position sensor
17: Temperature and humidity chamber 19: Temperature and humidity control section
100: Temperature chamber 110: Temperature and humidity control unit
200: CVVT system sample 210: Reduction gear
220: motor 230: intelligent controller
300: Powder brake 400: Encoder
500: Axis 600: Transmission unit
700: jig member

Claims (6)

A closed temperature chamber;
A CVVT system sample disposed within the temperature chamber;
A powder brake disposed outside the temperature chamber and applying a load to the CVVT system sample; And
And an encoder disposed outside the temperature chamber and measuring an angle change of the CVVT system sample when a load is applied to the CVVT system. The method according to claim 1,
The CVVT system sample
A speed reducer, a motor, and an intelligent controller. The method according to claim 1,
Wherein the CVVT system sample, the powder brake, and the encoder are coaxially connected. The method of claim 3,
And a jig member for fixing the CVVT system sample, the powder brake, and the encoder so as to be coaxially connected to each other. The method of claim 2,
And a transmitter for converting an angle measured by the encoder to transmit the current phase to the intelligent controller. The method according to claim 1,
And a temperature and humidity controller for controlling the temperature and humidity inside the temperature chamber.
KR1020150117560A 2015-08-20 2015-08-20 Test equipment for measuring durability reliability of cvvt system KR20170022493A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20220168867A (en) 2021-06-17 2022-12-26 현대로템 주식회사 Bearing Shaft Voltage Durability Test Device for Electric Machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20220168867A (en) 2021-06-17 2022-12-26 현대로템 주식회사 Bearing Shaft Voltage Durability Test Device for Electric Machine

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