KR101819896B1 - Apparatus and Method for testing engine CVV duration mechanism - Google Patents

Abstract

The present invention relates to an apparatus and a method for testing a continuous variable valve duration mechanism of an engine. According to an embodiment of the present invention, an apparatus for testing a specific apparatus mounted on the engine as an object comprises: a main body (20) receiving the object on a bed module (21) and a frame (23), and applying a driving force to rotate a shaft of the object; a support means (30) for controlling gripping of the object by up and down movement of a pressure plate (33) mounted on the frame (23); and a control means (40) for measuring valve duration based on a signal generated in accordance with the rotation of the shaft of the object. Accordingly, the apparatus for testing a specific apparatus mounted on an engine as an object can check an operation and quality of a continuously variable valve duration mechanism of an engine while the continuously variable valve duration mechanism of an engine is not mounted on the engine of a vehicle, can simultaneously measure a plurality of valves, thereby reducing airborne, and as a result, improving engine productivity in mass production.

Description

Technical Field [0001] The present invention relates to a CVV duration mechanism for a continuous variable valve duration mechanism of an engine,

The present invention relates to a test of an engine, and more particularly, to a test apparatus and a test method for continuously variable valve duration devices of an engine for checking operation and quality in a state where the engine is not mounted on an engine of a vehicle.

Normally, an adjustment process for adjusting the valve clearance or the like is required for stable operation after mounting the valve mechanism to the engine. In this case, if an abnormality or failure of the valve mechanism occurs, it is necessary to perform the adjustment process by replacing the valve with a new device after detachment from the engine and inconvenience is incurred, and in addition, .

In the related art, Korean Patent Registration No. 1361611 (Prior Document 1) and Korean Patent Registration No. 1593100 (Prior Document 2) are known as prior art documents to be referred to.

In the prior art document 1, a driving section for transferring a rotational force to a continuously variable valve lift apparatus by simulating a camshaft of an engine, a measuring section for measuring a valve gap according to a rotational motion of the continuously variable valve lift apparatus, And a control unit for controlling the displayed gap to be displayed on the screen. Therefore, an effect of mounting the valve gap to an engine of an actual vehicle after adjusting the valve gap to a preset reference value is expected.

In the prior art document 2, a signal from a CKP (crankshaft position) sensor for measuring the number of revolutions of a crank wheel, a CMP (camshaft position) sensor for measuring a rotational position of the camshaft, and a signal from the CKP sensor and the CMP sensor, And a control unit controlling the phase angle of the camshaft by controlling the converting unit. Therefore, it is expected that an accurate test will be performed through the same conditions and procedures as those mounted on the actual vehicle before being mounted on the vehicle.

However, since the prior art 1 is aimed at measuring the gap of the valve and the prior art 2 is aimed at measuring the phase angle of the camshaft, it is not suitable because it requires a lot of improvement to measure the duration of the continuous variable valve.

1. Korean Patent Registration No. 1361611 entitled "Test Apparatus and Test Method for Continuous Variable Valve Lift Device of Engine" (Publication Date: Feb. 23, 2014). 2. Korean Patent Registration No. 1593100 entitled "Test Apparatus for Continuous Variable Valve Control System" (Publication Date: Jan. 26, 2016).

SUMMARY OF THE INVENTION It is an object of the present invention to overcome the above-mentioned problems of the prior art by providing a continuously variable variable valve duration mechanism of an engine that can be operated and checked for quality in a state in which the engine is not mounted on the engine, And to provide a test apparatus and a test method for variable valve duration.

It is another object of the present invention to improve productivity by simultaneously measuring a plurality of valves in measuring and checking the operation and function of the apparatus.

In order to achieve the above object, according to one aspect of the present invention, there is provided an apparatus for testing a specific mechanism mounted on an engine, the apparatus comprising: ; Supporting means for interrupting gripping of the object by up-and-down movement of a platen mounted on the frame; And control means for calculating a valve duration based on a signal generated in accordance with the rotation of the shaft of the object.

In the detailed construction of the present invention, the main body drives the camshaft by the first driving motor on one side and drives the control shaft by the second driving motor on the other side.

In the detailed construction of the present invention, the supporting means includes an air cylinder mounted on the frame and serving as a driving source for up and down movement of the pressure plate, and a plunger mounted on the platen and acting as a buffer.

According to a further embodiment of the present invention, the control means includes a displacement sensor for detecting a valve lift, a torque meter for detecting torque of the shaft, and an angle sensor for detecting a rotation angle of the shaft.

In this case, the displacement sensor is installed via a roller shoe rotatably contacting the cam of the object on the bad module.

According to another aspect of the present invention, there is provided a method of testing an object based on the testing apparatus of claim 1, the method comprising: (A) mounting an object on a bad module and driving the object on the same condition as an actual engine; (B) inputting a drive torque and a rotation angle of the camshaft, a drive torque and a rotation angle of the control shaft, and a valve lift signal to the controller of the control means; And (C) outputting a result value through an operation set by a controller of the control means.

In the detailed configuration of the present invention, the step (C) is characterized by calculating a valve duration through an operation on a valve profile and selectively providing a graphic screen for a result value.

As described above, according to the present invention, it is possible to check the operation and quality of the continuously variable valve duration mechanism of the engine in the state where the continuously variable valve duration mechanism of the engine is not mounted on the engine of the vehicle, and to simultaneously measure a plurality of valves, The engine productivity is improved.

Figure 1 shows a schematic representation of a device according to the invention
Fig. 2 is an enlarged schematic view showing a main part of the apparatus according to the present invention; Fig.
Figure 3 is a block diagram showing in detail the device according to the invention
Figs. 4 and 5 are enlarged views of the main part of Fig. 3
6 is a process flow diagram illustrating the main steps of the method according to the invention
Figure 7 is a graph illustrating the results by the method according to the present invention

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

According to one aspect of the present invention, an apparatus for testing a specific mechanism mounted on an engine with an object is proposed. The specific mechanism is illustrated by but not limited to a continuous variable valve duration (CVVD) mechanism 10. Referring to FIG. 2, the CVVD mechanism 10 may be implemented in various manners, but the camshaft 12 and the control shaft 15 are formed as a concave body. The camshaft 12 has a plurality of cams 13 for lifting (opening and closing) an intake valve and an exhaust valve. The control shaft 15 is connected to the camshaft 12 via a link, .

According to the present invention, a main body 20 for applying a driving force to rotate a shaft of an object is received on the badmodule 21 and the frame 23. 1 and 3, the main body 20 is exemplified by a bad module 21 disposed on the lower side and a frame 23 disposed on the upper side. The bad module 21 receives the object in a seated state, and the frame 23 mounts the supporting means 30, which will be described later.

As a detailed configuration of the present invention, the main body 20 drives the camshaft 12 by the first drive motor 25 on one side and drives the control shaft 15 by the second drive motor 26 on the other side . 3, the first drive motor 25 on the left side is connected to the camshaft 12 located on the lower side by one shaft, and the second drive motor 26 on the right side is connected to the control shaft 15 on the other side. It is preferable that the drive motors 25 and 26 use a servo motor capable of controlling the correct normal / reverse rotation speed and torque.

Further, according to the present invention, the holding means (30) controls gripping of the object by up and down movement of the pressure plate (33) mounted on the frame (23). The holding means 30 generates gripping force in the state of simulating the engine without unnecessary fluctuations during measurement of the object. The pressure plate (33) is mounted on a driving source fixed to the frame (23) so as to be movable up and down.

The supporting means 30 is mounted on the frame 23 and is mounted on the air cylinder 32 and the pressure plate 33 serving as a driving source for up and down movement of the pressure plate 33, And a plunger (35). It is advantageous to use an air cylinder 32 as a driving source for up-and-down movement of the pressure plate 33 and to use a return spring and a plunger to increase the buffering property at the time of pressing against the object. 2 and 4 illustrate a state in which a plurality of plungers 35 are in contact with the upper surface of the CVVD mechanism 10 as an object. The plunger 35 may further include a damping fluid in addition to the return spring 36 as a portion that contacts the object in an elastic and cushioning manner.

According to the present invention, the control means (40) calculates the valve duration with a signal generated in accordance with the rotation of the shaft of the object. The control means 40 is based on a microprocessor, a memory, and a controller 48 equipped with an input / output interface. The duration of the intake valve and the exhaust valve is determined by the movement of the cam 13 by the engagement of the camshaft 12 and the control shaft 15 and the detailed algorithm of the controller 48 is described later with reference to Fig.

The control means 40 includes a displacement sensor 41 for detecting the valve lift, a torque meter 45 (46) for detecting the torque of the shaft, an angle sensor (not shown) for detecting the rotation angle of the shaft 47). The displacement sensor 41 has a high resolution corresponding to the valve lift stroke range of the engine. A noncontact distance sensor may be further added considering both sides of reliability and durability. The torque meters (45) and (46) have a high resolution corresponding to the engine speed-torque range. The angle sensor 47 selects an encoder having a high resolution corresponding to the rotation speed range of the engine. The displacement sensor 41, the torque meter 45 and the angle sensor 47 are connected to the input interface of the controller 48, respectively.

The displacement sensor 41 is installed on the bad module 21 via a roller shoe 42 which rotatably contacts the cam 13 of the object. 5 illustrates a state in which the roller shoe 42 and the respective displacement sensors 41 are installed in a plurality of through holes formed in the bad module 21. The roller shoe 42 is in contact with the respective cams 13 via the rollers mounted on the upper end thereof and maintains the pressing contact force against the cam 13 via the respective return springs 43 at the lower end thereof.

According to another aspect of the present invention, a method for testing an object based on the test apparatus of claim 1 is proposed. A series of tests are performed for each of the main steps shown in Fig. 6 with the apparatus including the main body 20, the support means 30, and the control means 40.

The step (A) according to the present invention proceeds to the process of mounting the object on the bad module 21 and driving the object on the same condition as the actual engine. This is a process of performing mounting, fixing, and stabilization as shown in step S10 in Fig. The CVVD mechanism 10 is mounted on the badmodule 21 of the main body 20 and the pressure plate 33 and the plunger 35 are lowered and fixed by the pressing force of the air cylinder 32. [ So that the CVVD mechanism 10 can maintain the same state as that mounted on the engine. Thereafter, the drive motors 25 and 26 are connected to the camshaft 12 and the control shaft 15 of the CVVD mechanism 10 to simulate the drive and motion of the engine, Operation and quality check algorithms.

The step (B) according to the present invention inputs the drive torque and the rotation angle of the camshaft 12, the drive torque and the rotation angle of the control shaft 15, and the valve lift signal to the controller 48 of the control means 40 . The driving torque and the rotational position of the camshaft 12 are measured through the torque meter 45 and the angle sensor while the first driving motor 25 rotates at a constant rotational speed same as the rotational direction of the engine, The drive torque and the rotational position of the control shaft 15 are measured through the torque meter 46 and the angle sensor 47 while the second drive motor 26 rotates in the forward and reverse directions at a predetermined angle at step S30. Simultaneously, the roller shoe 42 is interlocked with the height of the cam 13 due to the rotation of the control shaft 15, and the displacement sensor 41 measures the lift (S40). When the cam 13 rotates and reaches the descending stroke end, a restoring force acts on the roller shoe 42 by the return spring 43, so that the contact state is always maintained.

The step (C) according to the present invention proceeds to a process of outputting a result value through the operation set by the controller 48 of the control means 40. [ The CVVD mechanism 10 operates in a state in which the CVVD mechanism 10 is simulated in the same condition as the engine, but the lift timing and duration of the valve vary in accordance with the rotation angle of the control shaft 15 when the engine is driven. The algorithm for processing step (B) (C) is stored and updated in the form of a program in the memory of the controller 48. The result of the operation is also stored in the memory and transmitted to the set output interface.

In the detailed configuration of the present invention, the step (C) is characterized by calculating a valve duration through an operation on a valve profile and selectively providing a graphic screen for a result value. Step S50 in FIG. 6 indicates that the duration is calculated using the signals obtained in steps S20, S30, and S40. In Fig. 7, the lift according to the rotation angle of the control shaft 15 is exemplified by three cases. Red (bass) means a standard duration, blue (short) means a reduced duration, and green (long) means an increased duration. The resultant value is preferably output graphically through a display mounted on the controller 48. [ In addition, the valve profile and the drive torque of the shaft can be displayed.

Thus, the operator at the engine mass production site can easily determine (OK / NG) the duration of the valve based on the resultant value of the controller 48. [

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. It is therefore intended that such variations and modifications fall within the scope of the appended claims.

10: CVVD mechanism 12: camshaft
13: cam 15: control shaft
20: main body 21: bad module
23: frame 25, 26: drive motor
30: support means 32: air cylinder
33: pressure plate 35: plunger
36: return spring 40: control means
41: displacement sensor 42: roller shoe
43: Return spring 45, 46: Torque meter
47: Angle sensor 48: Controller

Claims (7)

A test apparatus for an apparatus for testing a continuous variable valve duration mechanism of an engine as an object, comprising:
A main body 20 which receives the object on the badmodule 21 and the frame 23 and applies a driving force to rotate the shaft of the object;
Supporting means (30) for controlling the gripping of the object by up and down movement of the pressure plate (33) mounted on the frame (23); And
And control means (40) for calculating a valve duration by a signal generated in accordance with the rotation of the shaft of the object,
The main body 20 drives the camshaft 12 by the first drive motor 25 on one side and the control shaft 15 by the second drive motor 26 on the other side,
The supporting means 30 includes an air cylinder 32 mounted on the frame 23 and serving as a driving source for up-and-down movement of the pressure plate 33, and a plunger 35 mounted on the pressure plate 33 and serving as a buffer and,
The control means 40 includes a displacement sensor 41 for detecting a valve lift, a torque meter 45 (46) for detecting a torque of the shaft, and an angle sensor 47 for detecting a rotation angle of the shaft,
Wherein the displacement sensor (41) is installed via a roller shoe (42) rotatably contacting the cam (13) of the object on the bad module (21). delete delete delete delete A test method for an apparatus for testing a continuously variable valve duration mechanism of an engine with the test apparatus for an apparatus according to claim 1, the method comprising:
(A) mounting an object on a bad module (21) and driving the same on the same condition as an actual engine;
(B) inputting a drive torque and a rotation angle of the camshaft (12), a drive torque and a rotation angle of the control shaft (15), and a valve lift signal to the controller (48) of the control means (40); And
(C) outputting a result value through an operation set by a controller (48) of the control means (40). The method of claim 6,
Wherein the step (C) calculates a valve duration through an operation on a valve profile, and selectively provides a graphical display of a result value.

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