KR101637096B1 - Electrical continuous variable valve timing type brushless direct current motor verification method and system - Google Patents

Abstract

The present invention uses a BLDC motor connected to an intake camshaft of a vehicle engine and a speed reducer to advance or retard the camshaft rotation speed and monitor the valve phase through a crank output sensor (CKP) and a cam output (CMP) sensor in the engine block And more particularly, to a system and method for verifying a BLDC motor for an electronic continuous variable valve timing (E-CVVT) that allows the motor to be verified. The present invention provides a motor verification system for continuously variable variable valve timing, comprising: an engine unit that receives a fuel and provides a rotational force; A servo motor unit for rotating the crankshaft of the engine unit and simulating the crankshaft; A brushless (BLDC) motor unit connected to the camshaft of the engine unit; A speed reducer for increasing a torque of the BLDC motor; A crank sensing unit for sensing a rotation output (CKP) of the crankshaft; A cam output sensing part for sensing a rotation output (CMP) of the camshaft; A load applying unit for applying a load to the camshaft via a hysteresis brake; And a control unit that detects the rotation output of the crankshaft through the crank sensing unit when the load is applied to the camshaft, senses the rotation output of the camshaft through the cam output sensing unit, And controlling the opening and closing timing of the valve by advancing or retarding the rotational speed of the camshaft according to the calculated phase angle.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brushless motor for electronic continuous variable valve timing,

The present invention relates to a system and method for brushless motor verification of an electronic continuous variable valve timing, and more particularly, to a method and system for verifying a brushless motor for an electronic continuous variable valve timing by advancing or retarding a camshaft rotational speed using a BLDC motor and a speed reducer connected to an intake camshaft of the vehicle engine, To a brushless motor verification system and method for an electronic continuous variable valve timing which monitors the valve phase through a crank output sensor (CKP) and a cam output (CMP) sensor, and which can control the pressure of the oil supplied to the BLDC motor .

BACKGROUND ART [0002] Generally, an internal combustion engine of a vehicle is provided with an intake valve for sucking air and fuel into a combustion chamber, which generates power by supplying air and fuel from the outside and burning in a combustion chamber.

The intake valve and the exhaust valve are opened and closed by the rotation of the camshaft rotating in conjunction with the rotation of the crankshaft.

On the other hand, in order to increase the efficiency of the engine, it is necessary to change the opening and closing times of the valve depending on the engine running speed, the engine load, and the like depending on the running condition of the vehicle. In particular, the opening and closing timing of the intake valve greatly affects the filling efficiency. That is, if the intake valve is opened in advance, the valve overlap period becomes longer, and the volume efficiency is increased because the intake and exhaust inertial flow can be sufficiently utilized at high speed. However, at low speed, The amount of emission of the fuel is increased.

Accordingly, a continuous variable valve timing (CVVT) system has been developed and applied to control the valve timing appropriately according to the driving conditions of the engine so that the valve overlap period of the camshaft is not determined according to the rotation of the crankshaft, have.

The continuous variable valve timing system continuously changes the opening and closing timings of the intake and exhaust valves by changing phases of the intake and exhaust camshafts according to the number of revolutions of the engine and the load state of the vehicle. In other words, it is a system for changing a valve overlap, and its object is to reduce exhaust gas, improve performance, and stabilize idling.

Herein, the valve timing refers to a timing when the intake valve and the exhaust valve are opened or closed. The intake process is a process in which fresh air is introduced until the intake valve is opened and closed, and the exhaust process is a process of discharging the combustion gas until the exhaust valve is opened and closed. The opening and closing timing of the valve will affect the performance of the engine.

Also, the valve overlap is an interval in which the intake and exhaust valves are open at the same time. In case of a general engine, once the valve overlap is established, there is a disadvantage in low speed or high speed region because it is constantly used in the entire region of engine speed. Therefore, controlling the valve overlap according to the engine load appears to be an improvement of the engine output. Thus, the continuous variable valve timing system is controlled in accordance with the engine load.

The components of the continuous variable valve timing system include a continuously variable valve timing unit, an oil control valve (OCV), an oil temperature sensor (OTS), an oil control valve filter and an oil control valve A continuous variable valve timing unit is mounted on the exhaust side camshaft and the inside is constituted by a housing and a rotor and between the housing and the rotor vane, And oil is introduced through the oil control valve to move the rotor vane.

In addition, the oil control valve is a key component of the continuous variable valve timing system. It regulates engine oil supplied from the oil pump by changing the direction of the fluid passage to the continuous variable valve timing unit under the control of the engine computer (ECU) .

In addition, the oil temperature sensor is a sensor that compensates for the change in the density of engine oil, which is the working fluid of the continuous variable valve timing unit, as the temperature changes according to the temperature. The measured value is sent to the ECU, and the ECU corrects it by driving the oil control valve.

In addition, the oil control valve filter functions to filter the impurities in the engine oil to the oil control valve. The auto tensioner connects the sprocket on the exhaust side camshaft and the sprocket on the intake side camshaft, where the continuous variable valve timing system is installed As the tensioning device of the chain, the auto tensioner prevents the response delay or deviation and the functional problems of the continuous variable valve timing system to ensure the safety of the performance.

Korean Registered Patent No. 1361611 (registered on February 05, 2014)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a camshaft rotation speed advance or retarded by using a BLDC motor and a speed reducer connected to an intake camshaft of a vehicle engine, And to control the pressure of the oil supplied to the BLDC motor, and to provide a system and method for verifying the brushless motor for electronic continuous variable valve timing.

According to an aspect of the present invention, there is provided an engine comprising: A servo motor unit for rotating the crankshaft of the engine unit and simulating the crankshaft; A brushless (BLDC) motor unit connected to the camshaft of the engine unit; A speed reducer for increasing a torque of the BLDC motor; A crank sensing unit for sensing a rotation output (CKP) of the crankshaft; A cam output sensing part for sensing a rotation output (CMP) of the camshaft; A load applying unit for applying a load to the camshaft via a hysteresis brake; And a control unit that detects the rotation output of the crankshaft through the crank sensing unit when the load is applied to the camshaft, senses the rotation output of the camshaft through the cam output sensing unit, And a control section for calculating the angle and adjusting the opening and closing timing of the valve by advancing or retarding the rotational speed of the camshaft in accordance with the calculated phase angle, thereby providing a brushless motor verification system for electronic continuous variable valve timing.

The engine may further include an oil supply unit for supplying engine oil to the engine unit.

In addition, the control unit controls the pressure of the engine oil supplied from the oil supply unit.

Further, in order to verify the BLDC motor unit, the environmental conditioner may further include an environment setting unit for applying a temperature load to the CVVT unit through simulation of an actual vehicle temperature condition to create an environmental condition.

In addition, the control unit may adjust the valve opening / closing timing by changing the direction of the fluid passage to the engine unit from the engine oil supplied from the oil supply unit.

The camshaft is connected to a sprocket wheel of the servomotor through a chain.

The rotation output (CKP) of the crankshaft is 1.67 or more, the% GRR is 10% or less, the test temperature is within -40 ° C to + 150 ° C, and the servo motor portion is rotatable up to 3000 RPM.

According to another aspect of the present invention, there is provided a method of driving a crankshaft comprising the steps of: (a) rotating a crankshaft of an engine unit and simulating the crankshaft; (b) applying a load to the camshaft connected to the crankshaft via a chain via a hysteresis brake; (c) sensing a rotation output (CKP) of the crankshaft; (d) sensing a rotation output (CMP) of the camshaft; (e) calculating a phase angle through a rotation output of the crankshaft and a rotation output of the camshaft; (f) adjusting the opening and closing timing of the valve by advancing or retarding the rotational speed of the camshaft in accordance with the calculated phase angle, thereby providing an electronic continuous variable valve timing brushless motor verification method.

In the step (a), the engine oil is supplied to the engine unit.

In the step (f), the pressure of the engine oil supplied from the oil supply unit may be adjusted.

In the step (c) and the step (d), a sprocket wheel mounted on the camshaft may be connected to a sprocket wheel mounted on the crankshaft via a chain.

In the step (f), the supplied engine oil changes the direction of the fluid passage to the engine section to adjust the valve opening / closing timing.

In the step (b), the temperature load is applied through simulation of the actual vehicle temperature condition.

The rotation output (CKP) of the crankshaft is 1.67 or more, the% GRR is 10% or less, the test temperature is within -40 ° C to + 150 ° C, and the servo motor unit can rotate to 3000 RPM.

According to the present invention, quality improvement and possible faults in the field can be detected through a verification test through simulation of actual vehicle conditions.

In addition, the cost of the test can be reduced by testing the cost of the test under similar conditions.

Also, verification test through simulation of actual vehicle temperature condition can improve the detection power and identify problems that may occur in the actual vehicle.

1 is a block diagram schematically showing the overall configuration of a brushless motor verification system for an electronic continuous variable valve timing according to an embodiment of the present invention.
FIG. 2 is a flowchart illustrating a method of verifying a brushless motor for an electronic continuous variable valve timing according to an embodiment of the present invention. Referring to FIG.
3 is a diagram illustrating an example of measuring the CVVT valve phase change and response time according to an embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that it is not intended to be limited to the particular embodiments of the invention but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a brushless motor verification system and method for an electronic continuous variable valve timing according to the present invention will be described in detail with reference to the accompanying drawings. In the following description with reference to the accompanying drawings, the same or corresponding components will be denoted by the same reference numerals, and redundant description thereof will be omitted.

1 is a block diagram schematically showing the overall configuration of a brushless motor verification system for an electronic continuous variable valve timing according to an embodiment of the present invention.

1, a brushless motor verification system 100 for an electronic continuous variable valve timing according to an embodiment of the present invention includes an engine unit 110, an oil supply unit 120, a servo motor unit 130, A brush sensing unit 160, a cam output sensing unit 162, a load applying unit 170, a controller 180, and a control unit 180. The brush unit 160 includes a brushless direct current (BLDC) motor 140, a speed reducer 150, a crank sensing unit 160, And an environment creation unit 190.

The engine 110 is supplied with fuel and provides rotational force.

The oil supply unit 120 supplies engine oil to the engine unit 110.

The servo motor unit 130 transmits power to the crankshaft of the engine unit 110 and rotates it, and simulates the crankshaft.

The BLDC motor unit 140 is connected to the camshaft of the engine unit 110.

The speed reducer 150 increases the torque output from the BLDC motor unit 140.

The crank sensing unit 160 senses the rotation output CKP of the crankshaft.

The cam output sensing unit 162 senses the rotation output (CMP) of the camshaft.

The load applying section 170 applies a load to the camshaft through a hysteresis brake.

When a load is applied to the camshaft, the control unit 180 senses the rotation output of the crankshaft through the crank sensing unit 160, senses the rotation output of the camshaft through the cam output sensing unit 162, The phase angle is calculated through the rotation output of the shaft and the rotation output of the cam shaft and the opening and closing timing of the valve is adjusted by advancing or retarding the rotational speed of the camshaft according to the calculated phase angle, Adjust the pressure.

The environment generating unit 190 generates environmental conditions by applying a temperature load to the surroundings through simulation of the actual vehicle temperature condition in order to verify the BLDC motor unit 140.

Here, the camshaft is connected to a sprocket wheel of the servo motor unit 130 through a chain.

The control unit 180 adjusts the valve opening / closing timing by changing the direction of the fluid passage to the engine unit 110 from the engine oil supplied from the oil supply unit 120.

The rotation output (CKP) of the crankshaft is 1.67 or more, the% GRR is 10% or less, the test temperature is within -40 ° C to + 150 ° C, and the servo motor unit 130 can rotate up to 3000 RPM.

FIG. 2 is a flowchart illustrating a method of verifying a brushless motor for an electronic continuous variable valve timing according to an embodiment of the present invention. Referring to FIG.

The test method of the motor according to the embodiment of the present invention is characterized in that the rotation output (CKP) of the crankshaft is 1.67 or more, the% GRR is 10% or less, the test temperature is within -40 ° C to + 150 ° C, 130) can be carried out under conditions capable of rotating up to 3000 RPM.

Referring to FIG. 2, a brushless motor verification system 100 for an electronic continuous variable valve timing according to an embodiment of the present invention first rotates a crankshaft of the engine 110, and simulates a crankshaft (S210).

Next, the control unit 180 supplies engine oil to the engine unit 110 through the oil supply unit 120 (S220). That is, the oil supply unit 120 supplies the engine oil to the engine unit 110 using the oil pump.

Next, the control unit 180 applies the temperature load to the engine unit 110 through simulation of the actual vehicle temperature condition through the environment creating unit 190 (S230). For example, if the temperature during traveling is 100 ° C, the temperature is tested at 140 ° C using a temperature chamber.

Then, a load is applied to the camshaft through the hysteresis brake (S240).

That is, the additional load (frictional force or the like) occurs when the camshaft wears under the actual vehicle condition and the shaft of the camshaft does not fit properly, so that the load on the camshaft of the engine unit 110 .

Therefore, the hysteresis brake is used to perform malfunction test or acceleration test.

Here, the evil test refers to a load at the time of camshaft rotation which can be caused by various reasons such as an assembly error or a material selection error in an assembling line under the condition of an automobile. When the load applied to the camshaft is 12 Nm, it is necessary to ensure the durability even if the load becomes 20 Nm for various reasons. Therefore, the hysteresis brake is used to ensure the durability under the bad condition.

Acceleration tests can be carried out for a short period of time, for example, 12 Nm when the average load is 9 Nm for the load of the camshaft, since the test life can not be tested for 15 years to confirm that the guarantee life of the vehicle is 300,000 Km for 15 years. .

Next, the control unit 180 senses the rotation output CKP of the crankshaft through the crank sensing unit 160 (S250).

Next, the control unit 180 senses the rotation output (CMP) of the camshaft through the cam output sensing unit 162 (S260).

At this time, a sprocket wheel mounted on the camshaft is connected to a sprocket wheel mounted on the crankshaft via a chain.

That is, the control unit 180 stores the sensing signals CKP and CMP for the specific positions A and B, as shown in FIG. 3, sensed by the crank sensing unit 160 and the cam output sensing unit 162, This measures the E-CVVT valve phase change and response time. 3 is a diagram illustrating an example of measuring the CVVT valve phase change and response time according to an embodiment of the present invention. 3, the controller 180 measures the time of the signal moved from the specific position A to the position B, and the movement time is based on the time when the position reaches 90% of the target position.

Next, the control unit 180 calculates the phase angle through the rotation output of the crankshaft and the rotation output of the camshaft (S270).

Next, the control unit 180 adjusts the valve opening / closing timing by advancing or retarding the rotational speed of the camshaft according to the calculated phase angle (S280).

At this time, the control unit 180 can change the valve phase using the BLDC motor unit 140 and the speed reducer 150 connected to the camshaft.

Further, the control unit 180 can adjust the pressure of the engine oil.

In addition, the control unit 180 adjusts the valve opening / closing timing by changing the direction of the fluid passage to the engine unit 110 from the engine oil supplied from the oil supply unit 120.

Although not shown in the drawing, the motor measuring unit may include a motor measuring unit for measuring the durability of the motor by monitoring the current of the motor through a current probe. Here, measuring the current of the motor corresponds to a conventional technique, so a detailed description thereof will be omitted.

As described above, according to the present invention, the camshaft rotational speed is advanced or retarded by using the BLDC motor connected to the intake camshaft of the vehicle engine and the decelerator, and the crank output sensor (CKP) and the cam output (CMP) sensor (BLDC) motor verification system and method for electronic continuous variable valve timing (E-CVVT), which allows monitoring the valve phase through the valve and controlling the temperature and pressure of the oil supplied to the BLDC motor.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents. Only. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

The present invention advances or attenuates the camshaft rotational speed using a BLDC motor and a speed reducer connected to the intake camshaft of the vehicle engine and monitors the valve phase through a crank output sensor (CKP) and a cam output (CMP) sensor in the engine block , And a BLDC motor verification system and method for an electronic continuous variable valve timing (E-CVVT) that can control the temperature and pressure of oil supplied to a BLDC motor.

100: Electronic continuous variable valve timing device test system
110: engine section
120: Oil supply part
130: Servo motor part
140: BLDC motor section
150: Reducer
160: Crank (CKP) sensing unit
162: Cam output (CMP)
170:
180:
190: Environment Department

Claims (14)

An engine unit that receives fuel and provides rotational force;
A servo motor unit for rotating the crankshaft of the engine unit and simulating the crankshaft;
A brushless (BLDC) motor unit connected to the camshaft of the engine unit;
A speed reducer for increasing a torque of the BLDC motor;
A crank sensing unit for sensing a rotation output (CKP) of the crankshaft;
A cam output sensing part for sensing a rotation output (CMP) of the camshaft;
A load applying unit for applying a load to the camshaft via a hysteresis brake; And
A rotation output of the crankshaft is sensed through a crank sensing unit and a rotation output of the camshaft is sensed through a cam output sensing unit to detect a phase angle of the crankshaft through the rotation output of the crankshaft and the rotation output of the camshaft, And controls the opening and closing timing of the valve by advancing or retarding the rotational speed of the camshaft according to the calculated phase angle.
And a brushless motor for electronic continuous variable valve timing.
The method of claim 1,
An oil supply unit for supplying engine oil to the engine unit;
Further comprising: a brushless motor verification system for continuously variable variable valve timing.
The method of claim 2,
Wherein the control unit adjusts the pressure of the engine oil supplied from the oil supply unit.
The method according to claim 1,
An environment generating unit for applying a temperature load to the CVVT unit through simulation of the actual vehicle temperature condition for verification of the BLDC motor unit to create an environmental condition;
Further comprising: a brushless motor verification system for continuously variable variable valve timing.
The method of claim 2,
Wherein the control unit adjusts the valve opening / closing timing by changing the direction of the fluid passage to the engine unit from the engine oil supplied from the oil supply unit.
The method according to claim 1,
Wherein the camshaft is connected to a sprocket wheel of the servomotor through a chain. 2. The brushless motor of claim 1, wherein the camshaft is connected to a sprocket wheel of the servomotor through a chain.
The method according to claim 1,
Wherein the rotation output (CKP) of the crankshaft is 1.67 or more, the% GRR is 10% or less, the test temperature is within -40 ° C to + 150 ° C, and the servomotor portion is rotatable up to 3000 RPM Brushless motor verification system for valve timing.
(a) rotating the crankshaft of the engine section and simulating the crankshaft;
(b) applying a load to the camshaft connected to the crankshaft via a chain via a hysteresis brake;
(c) sensing a rotation output (CKP) of the crankshaft;
(d) sensing a rotation output (CMP) of the camshaft;
(e) calculating a phase angle through a rotation output of the crankshaft and a rotation output of the camshaft;
(f) adjusting the opening and closing timing of the valve by advancing or retarding the rotational speed of the camshaft according to the calculated phase angle;
The method comprising the steps < RTI ID = 0.0 > of: < / RTI >
The method of claim 8,
Wherein the step (a) comprises supplying engine oil to the engine section.
The method of claim 9,
Wherein the step (f) adjusts the pressure of the engine oil supplied from the oil supply unit.
The method of claim 8,
Wherein a sprocket wheel mounted on the camshaft is connected to a sprocket wheel mounted on the crankshaft in the step (c) and the step (d) Timing brushless motor verification method.
The method of claim 10,
Wherein the step (f) adjusts the valve opening / closing timing by changing the direction of the fluid passage to the engine section by the supplied engine oil.
The method of claim 8,
Wherein the step (b) is performed by applying a temperature load through simulation of an actual vehicle temperature condition.
The method of claim 8,
Wherein the rotation output CKP of the crankshaft is 1.67 or more, the% GRR is 10% or less, the test temperature is within -40 ° C to + 150 ° C, and the servo motor portion that simulates the crankshaft is rotatable up to 3000 RPM A method of verifying a brushless motor for an electronic continuous variable valve timing.

Images