WO2019052906A1 - Apparatus and method for controlling motor of variable charge motion actuator - Google Patents

Apparatus and method for controlling motor of variable charge motion actuator Download PDF

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Publication number
WO2019052906A1
WO2019052906A1 PCT/EP2018/074107 EP2018074107W WO2019052906A1 WO 2019052906 A1 WO2019052906 A1 WO 2019052906A1 EP 2018074107 W EP2018074107 W EP 2018074107W WO 2019052906 A1 WO2019052906 A1 WO 2019052906A1
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WO
WIPO (PCT)
Prior art keywords
motor
soft
plate
landing
point
Prior art date
Application number
PCT/EP2018/074107
Other languages
French (fr)
Inventor
Jaeyoung Lee
Original Assignee
Continental Automotive Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Continental Automotive Gmbh filed Critical Continental Automotive Gmbh
Publication of WO2019052906A1 publication Critical patent/WO2019052906A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B31/00—Modifying induction systems for imparting a rotation to the charge in the cylinder
    • F02B31/04—Modifying induction systems for imparting a rotation to the charge in the cylinder by means within the induction channel, e.g. deflectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B31/00—Modifying induction systems for imparting a rotation to the charge in the cylinder
    • F02B31/04—Modifying induction systems for imparting a rotation to the charge in the cylinder by means within the induction channel, e.g. deflectors
    • F02B31/06—Movable means, e.g. butterfly valves
    • F02B31/08—Movable means, e.g. butterfly valves having multiple air inlets, i.e. having main and auxiliary intake passages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0002—Controlling intake air
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
    • H02P23/20—Controlling the acceleration or deceleration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0002—Controlling intake air
    • F02D2041/0015—Controlling intake air for engines with means for controlling swirl or tumble flow, e.g. by using swirl valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
    • F02D2041/1409—Introducing closed-loop corrections characterised by the control or regulation method using at least a proportional, integral or derivative controller
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
    • F02D2041/1413—Controller structures or design
    • F02D2041/1418—Several control loops, either as alternatives or simultaneous
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/43—Speed, acceleration, deceleration control ADC
    • G05B2219/43078—Near end position limit switch, brake by reversing, then slow until end limit
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Definitions

  • the present invention relates to an apparatus and method for controlling a motor of a variable charge motion actuator, and more particularly, to an apparatus and method for controlling a motor of a variable charge motion actuator for preventing mechanical hard stop at a mechanical end position of the variable charge motion actuator.
  • an engine is equipped with a variable charge motion actuator (VCMA) to increase an air flow in an intake manifold, and a plate of the variable charge motion actuator (VCMA) is controlled to an open/closed state according to an operating condition of the engine to obtain a desired air flow.
  • VCMA variable charge motion actuator
  • variable charge motion actuator a method in which a pulse width modulation (PWM) value for controlling the motor of the variable charge motion actuator (VCMA) is limited to a predetermined value or less to prevent mechanical hard stop at a mechanical end position (i.e., an open/close position) has been used.
  • PWM pulse width modulation
  • a moving speed of the plate of the variable charge motion actuator (VCMA) is not easily reduced to a desired specific value or less due to the inertia of the motor, even if the pulse width modulation (PWM) is limited to the predetermined value or less.
  • a soft-landing control has to be started from a position that is considerably far away from an actual mechanical end position so that a desired soft-landing speed can be obtained.
  • a desired soft-landing speed can be obtained.
  • the moving speed of the plate exceeds 50 deg/sec due to the inertia of the motor.
  • the mechanical hard stop still occurs at the mechanical end position, which may lead to damage of the component.
  • an object of the present invention is to provide an apparatus and method for controlling a motor of a variable charge motion actuator for preventing mechanical hard stop at a mechanical end position of the variable charge motion actuator.
  • An apparatus for controlling a motor of a variable charge motion actuator is characterized by including: a control unit controlling the motor of the variable charge motion actuator; and a plate connected to the motor to change it to an open state or a closed state with respect to an intake manifold according to rotation of the motor, wherein, in order to change the plate to the open state or the closed state, the control unit drives the motor in a direction corresponding to any one state, and when the plate starts movement in the direction corresponding to the any one state through the driving of the motor, the plate reaches a start point of a soft-landing region, which is set at a point ahead from a mechanical end position in a direction corresponding to each of the states of the plate is detected, and a soft-landing control of the motor is performed from the preset start point of the soft-landing region to an end point at which the movement of the plate is finished to allow the plate to move at a speed slower than that in the region before the start point of the soft-landing region.
  • a method for controlling a motor of a variable charge motion actuator is characterized by including: a step of controlling the motor of the variable charge motion actuator to drive the motor in a direction corresponding to any one state so as to change a plate connected to the motor to an open state or a closed state; a step of allowing a control unit to detect whether the plate reaches a start point of a soft-landing region, which is set at a point ahead from a mechanical end position in a direction corresponding to each of the states of the plate when the plate starts movement in the direction corresponding to the any one state through the driving of the motor; and a step of performing a soft-landing control from the preset start point of the soft-landing region to an end point at which the movement of the plate is finished to allow the plate to move at a speed slower than that in the region before the start point of the soft-landing region.
  • FIG. 1 is an exemplary block diagram illustrating a schematic configuration of an apparatus for controlling a motor of a variable charge motion actuator according to an embodiment of the present invention.
  • FIG. 2 is an exemplary view for explaining a method for controlling a motor of a variable charge motion actuator according to an embodiment of the present invention.
  • FIG. 3 is an exemplary view for explaining a mechanical end position and a target open/close position in FIG. 1.
  • a variable charge motion actuator (VCMA) is used to increase an air flow in an intake manifold as described above, and a plate of the variable charge motion actuator (VCMA) is controlled to an open/closed state according to an operating condition of the engine to obtain a desired air flow allow the plate to move at a speed slower than that in the region before the start point of the soft-landing region .
  • the plate of the variable charge motion actuator (VCMA) has to be controlled at a high speed to change a position so as to obtain the desired air flow.
  • a response time is faster than 150 ms .
  • VCMA variable charge motion actuator
  • the position control of the motor in the present embodiment has means to control an angle of rotation of the motor, but the position (or the open/closed state) of the plate is in fact controlled in cooperation with the rotation of the motor according to the rotation of the motor (or the position of the motor) .
  • two terms for example: the position control of the motor, the position control of the plate
  • the position control of the plate may be mixed for convenience.
  • the soft-landing control has to be able to quickly change the state of the plate while allowing the soft-landing control to operate only in the vicinity of the mechanical end position.
  • the existing method for limiting a PWM value for controlling the position of the motor of the variable charge motion actuator (VCMA) has a disadvantage in that, in order to ,
  • the PWM value has to be limited from a point far before the mechanical end position but in the vicinity of the mechanical end position so as to obtain the desired low speed by overcoming the inertia.
  • a control unit (not shown) should be understood as a control for controlling an operation of a motor.
  • FIG. 1 is an exemplary block diagram illustrating a schematic configuration of an apparatus for controlling a motor of a variable charge motion actuator according to an embodiment of the present invention.
  • an apparatus for controlling a motor of a variable charge motion actuator includes a control unit (110), a driving unit (120), an actuator (130), and a plate (140).
  • the variable charge motion actuator (VCMA) is mounted to increase an air flow in an intake manifold of an engine, and the control unit (110) controls (for example: controls a rotating direction and a rotating speed) the actuator (130) (for example: a motor) through the driving unit (120) to control an open/closed state of the plate (or a flap) (140) connected to the actuator (130) . That is, the control unit (110) controls the actuator (130) (for example: the motor), to which the plate (140) is connected, by using the control unit (120) so as to control the open/closed state of the plate (or the flap) (140) .
  • the control unit (110) controls (for example: controls a rotating direction and a rotating speed) the actuator (130) (for example: a motor) through the driving unit (120) to control an open/closed state of the plate (or a flap) (140) connected to the actuator (130) . That is, the control unit (110) controls the actuator (130) (for example: the motor), to which
  • the control unit (110) controls the rotating direction (or the driving direction) of the actuator (130) (for example: the motor) . Also, in order to control an opening/closing speed of the plate (140), the control unit (110) controls a rotating speed (or a driving speed) of the actuator (130) (for example: the motor) .
  • FIGS. 2 and 3 A specific operation of the control unit (110) will be described with reference to FIGS. 2 and 3.
  • FIG. 2 is an exemplary view for explaining a method for controlling a motor of a variable charge motion actuator according to an embodiment of the present invention
  • FIG. 3 is an exemplary view for explaining a mechanical end position and a target open/close position in FIG. 2.
  • the open/closed state (or position) of the plate is substantially changed between the two points (for example: ECP, EOP) .
  • ECP electrical close position
  • EOP electrical open position
  • the motor starts the movement (i.e., starts the rotation for changing the state of the plate) ( ⁇ ) to allow the control unit to start a soft-landing control from a point (i.e., a start point of a soft-landing region) at which the predetermined angle (for example: 5 degrees) descends from the electrical open position (EOP) ((f)) .
  • a point i.e., a start point of a soft-landing region
  • the predetermined angle for example: 5 degrees
  • At least one sensor for example: an encoder, an infrared sensor, and the like
  • a physical switch for detecting the rotating angle or position (or the position of the plate)
  • the control unit (110) may detect or calculate the rotating angle or position (or the position of the plate) of the motor on the basis of information detected through the at least one sensor or the physical switch.
  • the control unit starts the soft-landing control from the point (i.e., the start point of the soft-landing region) at which the predetermined angle (for example: 5 degrees) descends from the electrical close position (ECP) ( ⁇ ) .
  • the soft-landing control (@, ⁇ ) method does not use a method of limiting the PWM value for controlling the motor of the existing variable charge motion actuator (VCMA) (a method of controlling a current level applied to the motor) , but uses a method of slowly adjusting the change of a target set point (i.e., the position of the plate, or the position of the motor corresponding to a target position of the plate) for controlling the motor of the variable charge motion actuator (VCMA) (i.e., a method of increasing a time taken to move the position of same) .
  • VCMA variable charge motion actuator
  • the position of the motor is controlled by continuously using the previously performed motor position control method (for example: a proportional integral differ- ential (PID) control) .
  • PID proportional integral differ- ential
  • the plate is controlled as fast as possible by following a difference between the target set point and the actual position of the plate according to the characteristics of the existing motor position control method (for example: the PID control) .
  • the control unit (not shown) quickly changes the target set point to correspond to a desired speed (for example: a relatively high speed), thereby quickly performing the actual position control of the motor according to the characteristics of the existing motor position control method (for example: the PID control) .
  • the present embodiment has an effect of increasing the time taken to move the position of the motor (or the position of the plate) while maintaining the current level applied to the motor.
  • the inertia varies depending on whether the position of the plate (i.e., the position of the motor) moves quickly or slowly. As a result, it is practically difficult to accurately control the time (i.e., the position of the plate or the motor) taken to limit the PWM value by accurately reflecting the effect of the inertia.
  • the target set point i.e., the target position of the plate or the position of the motor corresponding to the target position of the plate
  • the target set point may be slowly changed (i.e., changed slower than that in the regions @, (5) ) without reducing the current applied to the motor (i.e., without limiting the PWM value) to cause an effect that substantially excludes the effect of the inertia.
  • the target set point i.e., the target position of the plate or the position of the motor corresponding to the target position of the plate
  • the desired motor position control speed i.e., a normal speed
  • the target set point is slowly (i.e., relatively slower than the normal speed) changed in the soft-landing region, thereby preventing the mechanical hard stop by substantially increasing the time reaching the EOP or the ECP.
  • the lowering speed may be set by reflecting at least one or more factors (for example: an air flow rate of the intake manifold, an engine rotation speed, a cooling water temperature, a system voltage, and the like) , which can affect the actual motor position control during the PID control by the target set point.
  • factors for example: an air flow rate of the intake manifold, an engine rotation speed, a cooling water temperature, a system voltage, and the like
  • the method for controlling the motor of the variable charge motion actuator (VCMA) (i.e., the soft-landing control method) according to the present embodiment may be applied not only to the preset soft-landing region but also to a key off condition and a situation in which the control of the variable charge motion actuator (VCMA) system is interrupted due to an occurrence of an error in the variable charge motion actuator (VCMA) system.
  • the present embodiment may have the effect in which the mechanical hard stop is prevented from occurring at the mechanical end position of the variable charge motion actuator to prevent the component form being damaged by the mechanical hard stop .

Abstract

The present invention relates to an apparatus and method for controlling a motor of a variable charge motion actuator, which is characterized by including: a control unit controlling the motor of the variable charge motion actuator; and a plate connected to the motor to change it to an open state or a closed state with respect to an intake manifold to according to rotation of the motor, wherein, in order to change the plate to the open state or the closed state, the control unit drives the motor in a direction corresponding to any one state, and when the plate starts movement in the direction corresponding to the any one state through the driving of the motor, the plate reaches a start point of a soft-landing region, which is set at a point ahead from a mechanical end position in a direction corresponding to each of the states of the plate is determined, and a soft-landing control of the motor is performed from the preset start point of the soft-landing region to an end point at which the movement of the plate is finished to allow the plate to move at a speed slower than that in the region before the start point of the soft-landing region.

Description

Description
APPARATUS AND METHOD FOR CONTROLLING MOTOR OF VARIABLE CHARGE MOTION ACTUATOR
The present invention relates to an apparatus and method for controlling a motor of a variable charge motion actuator, and more particularly, to an apparatus and method for controlling a motor of a variable charge motion actuator for preventing mechanical hard stop at a mechanical end position of the variable charge motion actuator.
Generally, an engine is equipped with a variable charge motion actuator (VCMA) to increase an air flow in an intake manifold, and a plate of the variable charge motion actuator (VCMA) is controlled to an open/closed state according to an operating condition of the engine to obtain a desired air flow.
Furthermore, in the existing variable charge motion actuator (VCMA) system, a method in which a pulse width modulation (PWM) value for controlling the motor of the variable charge motion actuator (VCMA) is limited to a predetermined value or less to prevent mechanical hard stop at a mechanical end position (i.e., an open/close position) has been used. However, there is a problem that a moving speed of the plate of the variable charge motion actuator (VCMA) is not easily reduced to a desired specific value or less due to the inertia of the motor, even if the pulse width modulation (PWM) is limited to the predetermined value or less. Thus, in order to reduce the moving speed of the plate to the desired specific value or less, in the past, a soft-landing control has to be started from a position that is considerably far away from an actual mechanical end position so that a desired soft-landing speed can be obtained. For example, when it is desired to adjust the moving speed of the plate to be within 50 deg/sec from a time point at which the plate enters within an angle of 5 degrees from the mechanical end position, in the existing soft-landing method, even if the PWM value for controlling the motor of the variable charge motion actuator (VCMA) is momentarily limited, the moving speed of the plate exceeds 50 deg/sec due to the inertia of the motor. Thus, the mechanical hard stop still occurs at the mechanical end position, which may lead to damage of the component.
Therefore, there is a need for a method for controlling the motor so that the mechanical hard stop does not occur at the mechanical end position of the variable charge motion actuator (VCMA) . The background art of the present invention is disclosed in Korean Patent Publication No. 10-2003-0067856 (Published on August 19, 2003, VARIABLE CHARGE MOTION VALVE CONTROL DEVICE FOR GASOLINE DIRECT INJECTION ENGINE AND CONTROL METHOD THEREOF) .
According to an aspect of the present invention, the present invention had been made to solve the above problems, therefore an object of the present invention is to provide an apparatus and method for controlling a motor of a variable charge motion actuator for preventing mechanical hard stop at a mechanical end position of the variable charge motion actuator.
An apparatus for controlling a motor of a variable charge motion actuator according to an aspect of the present invention is characterized by including: a control unit controlling the motor of the variable charge motion actuator; and a plate connected to the motor to change it to an open state or a closed state with respect to an intake manifold according to rotation of the motor, wherein, in order to change the plate to the open state or the closed state, the control unit drives the motor in a direction corresponding to any one state, and when the plate starts movement in the direction corresponding to the any one state through the driving of the motor, the plate reaches a start point of a soft-landing region, which is set at a point ahead from a mechanical end position in a direction corresponding to each of the states of the plate is detected, and a soft-landing control of the motor is performed from the preset start point of the soft-landing region to an end point at which the movement of the plate is finished to allow the plate to move at a speed slower than that in the region before the start point of the soft-landing region.
A method for controlling a motor of a variable charge motion actuator according to an aspect of the present invention is characterized by including: a step of controlling the motor of the variable charge motion actuator to drive the motor in a direction corresponding to any one state so as to change a plate connected to the motor to an open state or a closed state; a step of allowing a control unit to detect whether the plate reaches a start point of a soft-landing region, which is set at a point ahead from a mechanical end position in a direction corresponding to each of the states of the plate when the plate starts movement in the direction corresponding to the any one state through the driving of the motor; and a step of performing a soft-landing control from the preset start point of the soft-landing region to an end point at which the movement of the plate is finished to allow the plate to move at a speed slower than that in the region before the start point of the soft-landing region.
According to one aspect of the present invention, the present invention may prevent the mechanical hard stop at the mechanical end position of the variable charge motion actuator to prevent the components from being damaged due to the mechanical hard stop . FIG. 1 is an exemplary block diagram illustrating a schematic configuration of an apparatus for controlling a motor of a variable charge motion actuator according to an embodiment of the present invention.
FIG. 2 is an exemplary view for explaining a method for controlling a motor of a variable charge motion actuator according to an embodiment of the present invention. FIG. 3 is an exemplary view for explaining a mechanical end position and a target open/close position in FIG. 1.
Hereinafter, an apparatus and method for controlling a motor of a variable charge motion actuator according to the present invention will be described with reference to the accompanying drawings .
In the description, the thicknesses of the lines and the sizes of the components illustrated in the drawings may be exaggerated for clarity and convenience of explanation. Also, the following terms are terms defined in consideration of functions according to the present invention and thus may be changed according to the intension or usage of a user or operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.
In relation to the present embodiment, a variable charge motion actuator (VCMA) is used to increase an air flow in an intake manifold as described above, and a plate of the variable charge motion actuator (VCMA) is controlled to an open/closed state according to an operating condition of the engine to obtain a desired air flow allow the plate to move at a speed slower than that in the region before the start point of the soft-landing region . Thus, when the open/closed state of the plate is changed according to the operating condition of the engine, the plate of the variable charge motion actuator (VCMA) has to be controlled at a high speed to change a position so as to obtain the desired air flow.
For example, when the open/closed state of the plate is changed, a response time is faster than 150 ms . Thus, when a motor of the variable charge motion actuator (VCMA) is controlled, a PWM signal for allowing the plate to move at a high speed is applied to control the position of the plate.
For reference, the position control of the motor in the present embodiment has means to control an angle of rotation of the motor, but the position (or the open/closed state) of the plate is in fact controlled in cooperation with the rotation of the motor according to the rotation of the motor (or the position of the motor) . Thus, in the following description, two terms (for example: the position control of the motor, the position control of the plate) may be mixed for convenience.
When the position control of the plate of the variable charge motion actuator (VCMA) is quickly performed as described above, if a soft-landing control for preventing the mechanical hard stop in the vicinity of the mechanical end position is not smooth, the endurance of the component is adversely affected.
Thus, the soft-landing control has to be able to quickly change the state of the plate while allowing the soft-landing control to operate only in the vicinity of the mechanical end position. However, the existing method for limiting a PWM value for controlling the position of the motor of the variable charge motion actuator (VCMA) has a disadvantage in that, in order to ,
b slow down the operating speed of the plate, the PWM value has to be limited from a point far before the mechanical end position but in the vicinity of the mechanical end position so as to obtain the desired low speed by overcoming the inertia.
Therefore, a method for performing a motor control in con¬ sideration of the above-described contents when the motor of the variable charge motion actuator (VCMA) is controlled will be described below.
For reference, although not specifically shown in the drawings according to the present embodiment, in a variable charge motion actuator (VCMA) according to the present embodiment, a control unit (not shown) should be understood as a control for controlling an operation of a motor.
FIG. 1 is an exemplary block diagram illustrating a schematic configuration of an apparatus for controlling a motor of a variable charge motion actuator according to an embodiment of the present invention.
As illustrated in FIG. 1, an apparatus for controlling a motor of a variable charge motion actuator according to the present embodiment includes a control unit (110), a driving unit (120), an actuator (130), and a plate (140).
The variable charge motion actuator (VCMA) is mounted to increase an air flow in an intake manifold of an engine, and the control unit (110) controls (for example: controls a rotating direction and a rotating speed) the actuator (130) (for example: a motor) through the driving unit (120) to control an open/closed state of the plate (or a flap) (140) connected to the actuator (130) . That is, the control unit (110) controls the actuator (130) (for example: the motor), to which the plate (140) is connected, by using the control unit (120) so as to control the open/closed state of the plate (or the flap) (140) .
Here, in order to control the open/closed state of the plate (140) , the control unit (110) controls the rotating direction (or the driving direction) of the actuator (130) (for example: the motor) . Also, in order to control an opening/closing speed of the plate (140), the control unit (110) controls a rotating speed (or a driving speed) of the actuator (130) (for example: the motor) . A specific operation of the control unit (110) will be described with reference to FIGS. 2 and 3. FIG. 2 is an exemplary view for explaining a method for controlling a motor of a variable charge motion actuator according to an embodiment of the present invention, and FIG. 3 is an exemplary view for explaining a mechanical end position and a target open/close position in FIG. 2.
As illustrated in FIGS. 2 and 3, although it is possible to control up to a maximum mechanical end position in a manifold, i.e., a mechanical open position (In-Mani MOP) and a mechanical close position (In-Mani MCP) , when the plate actually moves up to the mechanical end position, since mechanical hard stop can cause component damage, substantially, the position control is performed so as to move only from an electrical open position (EOP) to an electrical close position (ECP) . That is, there is a difference between the mechanical open position (In-ManiMOP) and the mechanical close position (In-Mani MCP) and between the electrical open position (EOP) and the electrical close position (ECP) by a predetermined offset angle. 0
o
Therefore, the open/closed state (or position) of the plate is substantially changed between the two points (for example: ECP, EOP) . As illustrated in FIG. 2, it is assumed that a position cor¬ responding to the electrical close position (ECP) is an initial state of the motor (( )) , and the motor starts its operation to move to a position corresponding to the electrical open position (EOP) .
Here, the motor starts the movement (i.e., starts the rotation for changing the state of the plate) (©) to allow the control unit to start a soft-landing control from a point (i.e., a start point of a soft-landing region) at which the predetermined angle (for example: 5 degrees) descends from the electrical open position (EOP) ((f)) .
For reference, although not specifically shown in the drawings, at least one sensor (for example: an encoder, an infrared sensor, and the like) (not shown) or a physical switch (not shown) for detecting the rotating angle or position (or the position of the plate) may be provided. The control unit (110) may detect or calculate the rotating angle or position (or the position of the plate) of the motor on the basis of information detected through the at least one sensor or the physical switch.
Next, when the motor that reaches the electrical open position (EOP) through the soft-landing control ((¾■)) starts an operation in the opposite direction again (©) to move to the position corresponding to the electrical close position (ECP) , the control unit (not shown) starts the soft-landing control from the point (i.e., the start point of the soft-landing region) at which the predetermined angle (for example: 5 degrees) descends from the electrical close position (ECP) (©) .
At this time, in the present embodiment, the soft-landing control (@, ©) method does not use a method of limiting the PWM value for controlling the motor of the existing variable charge motion actuator (VCMA) (a method of controlling a current level applied to the motor) , but uses a method of slowly adjusting the change of a target set point (i.e., the position of the plate, or the position of the motor corresponding to a target position of the plate) for controlling the motor of the variable charge motion actuator (VCMA) (i.e., a method of increasing a time taken to move the position of same) . More particularly, according to the present embodiment, in the control regions (©, ©) except for the soft-landing control regions (©, ©) , the position of the motor is controlled by continuously using the previously performed motor position control method (for example: a proportional integral differ- ential (PID) control) . Thus, in the control regions (©, ©) except for the soft-landing control regions (©, ©) , the plate is controlled as fast as possible by following a difference between the target set point and the actual position of the plate according to the characteristics of the existing motor position control method (for example: the PID control) .
That is, in the control regions (©, ©) except for the soft-landing control regions (©, ©) , the control unit (not shown) quickly changes the target set point to correspond to a desired speed (for example: a relatively high speed), thereby quickly performing the actual position control of the motor according to the characteristics of the existing motor position control method (for example: the PID control) . However, when reaching the preset soft-landing control region ( (3) , ©) (i.e., the soft-landing start point), a change lim¬ itation value is set in the target set point itself to slowly change the target set point so as to correspond to a desired different speed (for example: a relatively low speed), thereby slowly performing the actual position control of the motor according to the characteristics of the existing motor position control method (for example: the PID control) . As a result, unlike the conventional art, the present embodiment has an effect of increasing the time taken to move the position of the motor (or the position of the plate) while maintaining the current level applied to the motor. That is, if the current applied to the motor is reduced (i.e., if the PWM valve is limited) in the conventional art, it is rather affected by the inertia. However, the inertia varies depending on whether the position of the plate (i.e., the position of the motor) moves quickly or slowly. As a result, it is practically difficult to accurately control the time (i.e., the position of the plate or the motor) taken to limit the PWM value by accurately reflecting the effect of the inertia.
However, in the present embodiment, the target set point (i.e., the target position of the plate or the position of the motor corresponding to the target position of the plate) may be slowly changed (i.e., changed slower than that in the regions @, (5) ) without reducing the current applied to the motor (i.e., without limiting the PWM value) to cause an effect that substantially excludes the effect of the inertia.
That is to say, in the method for controlling the motor of the variable charge motion actuator (VCMA) (i.e., the soft-landing control method) according to the present embodiment, the target set point (i.e., the target position of the plate or the position of the motor corresponding to the target position of the plate) is changed to correspond to the desired motor position control speed (i.e., a normal speed) in the remaining region except for the soft-landing region, and the target set point is slowly (i.e., relatively slower than the normal speed) changed in the soft-landing region, thereby preventing the mechanical hard stop by substantially increasing the time reaching the EOP or the ECP. When the changing speed of the target set point is lowered in the method for controlling the motor of the variable charge motion actuator (VCMA) (i.e., the soft-landing control method) ac¬ cording to the present embodiment, the lowering speed may be set by reflecting at least one or more factors (for example: an air flow rate of the intake manifold, an engine rotation speed, a cooling water temperature, a system voltage, and the like) , which can affect the actual motor position control during the PID control by the target set point. Furthermore, the method for controlling the motor of the variable charge motion actuator (VCMA) (i.e., the soft-landing control method) according to the present embodiment may be applied not only to the preset soft-landing region but also to a key off condition and a situation in which the control of the variable charge motion actuator (VCMA) system is interrupted due to an occurrence of an error in the variable charge motion actuator (VCMA) system.
Therefore, the present embodiment may have the effect in which the mechanical hard stop is prevented from occurring at the mechanical end position of the variable charge motion actuator to prevent the component form being damaged by the mechanical hard stop . While the present invention has been particularly shown and described with reference to the exemplary embodiments thereof, It is to be understood that various modifications and equivalents may be resorted to by those skilled in the art to which the present invention (i.e., changed slower than that in the regions @ , (5) ) . Accordingly, the technical scope of the present invention should be determined by the appended claims.
Description of Symbols
110: Control unit
120: Driving unit
130: Actuator
140: Plate
EOP: Electrical open position
ECP: Electrical close position

Claims

Patent claims
1. An apparatus for controlling a motor of a variable charge motion actuator, characterized by comprising:
a control unit controlling the motor of the variable charge motion actuator; and
a plate connected to the motor to change to an open state or a closed state with respect to an intake manifold to according to rotation of the motor,
wherein, in order to change the plate to the open state or the closed state, the control unit drives the motor in a direction corresponding to any one state, and when the plate starts movement in the direction corresponding to the any one state through the driving of the motor, when the plate reaches a start point of a soft-landing region, which is set at a point ahead from a mechanical end position in a direction corresponding to each of the states of the plate is determined, and a soft-landing control of the motor is performed from the preset start point of the soft-landing region to an end point at which the movement of the plate is finished to allow the plate to move at a speed slower than that in the region before the start point of the soft-landing region.
2. The apparatus for controlling the motor of the variable charge motion actuator of claim 1, wherein the soft-landing region is a region from a point that is ahead by a preset angle from an electrical open position (EOP) or an electrical close position (ECP) , which are set at the point ahead from the mechanical end position in the direction corresponding to each of the states of the plate, to the electrical open position (EOP) or the electrical close position (ECP) .
3. The apparatus for controlling the motor of the variable charge motion actuator of claim 1, wherein the control unit performs a soft-landing control in which the speed of change of the target set point for controlling the motor of the variable charge motion actuator is adjusted relatively slower than a region before the point at which the soft-landing region starts.
The apparatus for controlling the motor of the variable charge motion actuator of claim 3, wherein the target set point means a target position of the plate or a position or a rotating angle of the motor, which corresponds to the target position of the plate, and
the control method of slowly adjusting the speed of change of the target set point is a method of further increasing a time taken to move the plate to the same target position than before the point at which the soft-landing region starts.
The apparatus for controlling the motor of the variable charge motion actuator of claim 1, wherein, in the control of the motor in a proportional integral differential (PID) method, upon reaching the preset soft-landing start point, a control unit performs the soft-landing control in which the target set point is changed to correspond to a speed that is slower before the point at which the soft-landing region starts .
The apparatus for controlling the motor of the variable charge motion actuator of claim 1, wherein the control unit changes the target set point at a relatively slow speed in the soft-landing region when compared with a speed at which the target set point is changed in a remaining region except for the soft-landing region to increase a time taken to reach an electrical open position (EOP) or an electrical close position (ECP) , thereby performing the soft-landing control for preventing mechanical hard stop of the plate.
A method for controlling a motor of a variable charge motion actuator, characterized by comprising:
a step of controlling the motor of the variable charge motion actuator to drive the motor in a direction corresponding to any one state so as to change a plate connected to the motor to an open state or a closed state;
a step of allowing a control unit to detect when the plate reaches a start point of a soft-landing region, which is set at a point ahead from a mechanical end position in a direction corresponding to each of the states of the plate when the plate starts movement in the direction corresponding to the any one state through the driving of the motor; and a step of performing a soft-landing control from the preset start point of the soft-landing region to an end point at which the movement of the plate is finished to allow the plate to move at a speed slower than that in the region before the start point of the soft-landing region.
The method for controlling the motor of the variable charge motion actuator of claim 7, wherein the soft-landing region is a region from a point that is ahead by a preset angle from an electrical open position (EOP) or an electrical close position (ECP) , which are set at the point ahead from the mechanical end position in the direction corresponding to each of the states of the plate, to the electrical open position (EOP) or the electrical close position (ECP) .
The method for controlling the motor of the variable charge motion actuator of claim 7, wherein the soft-landing control is a control method in which the change of the target set point for controlling the motor of the variable charge motion actuator is adjusted relatively slower than a region before the point at which the soft-landing region starts.
10. The method for controlling the motor of the variable charge motion actuator of claim 9, wherein the target set point means a target position of the plate or a position or a rotating angle of the motor, which corresponds to the target position of the plate, and
the control method of slowly adjusting the change of the target set point is a method of further increasing a time taken to move the plate to the same target position as before the point at which the soft-landing region starts.
The method for controlling the motor of the variable charge motion actuator of claim 7, wherein, in the control of the motor in a proportional integral differential (PID) method through the control unit, upon reaching the preset soft-landing start point, the soft-landing control is a control method in which the target set point is changed to correspond to a speed that is slower when before the point at which the soft-landing region starts.
The method for controlling the motor of the variable charge motion actuator of claim 7, wherein, in the soft-landing control method, the target set point in the soft-landing region is relatively slowly changed when compared with a speed at which the target set point is changed in a remaining region except for the soft-landing region to increase a time taken to reach an electrical open position (EOP) or an electrical close position (ECP) , thereby performing the soft-landing control for preventing mechanical hard stop of the plate.
PCT/EP2018/074107 2017-09-18 2018-09-07 Apparatus and method for controlling motor of variable charge motion actuator WO2019052906A1 (en)

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