CN112832874B - Nozzle ring position self-learning method and nozzle ring opening determining method and device - Google Patents
Nozzle ring position self-learning method and nozzle ring opening determining method and device Download PDFInfo
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- CN112832874B CN112832874B CN202010386862.8A CN202010386862A CN112832874B CN 112832874 B CN112832874 B CN 112832874B CN 202010386862 A CN202010386862 A CN 202010386862A CN 112832874 B CN112832874 B CN 112832874B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
- F01D17/12—Final actuators arranged in stator parts
- F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
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- 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
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Abstract
The invention is suitable for the technical field of engine control, and provides a self-learning method for a nozzle ring position, a method and a device for determining the opening of a nozzle ring, wherein the method comprises the following steps: respectively acquiring upper and lower dead center feedback voltages of upper and lower dead center positions of the nozzle ring machinery; when the feedback voltages of the upper and lower dead points are respectively in a first preset voltage range and a second preset voltage range, determining the feedback voltages of the upper and lower dead points as the voltages when the nozzle ring is fully opened and the nozzle ring is fully closed; calculating the opening percentage and the slope value of the voltage in the moving range of the nozzle ring from full opening to full opening or from full opening to full closing according to the voltage of the nozzle ring at full opening and full closing; when the slope value is within the preset slope range, the self-learning of the position of the nozzle ring is determined to be completed, so that the real opening of the nozzle ring of the variable-section turbocharger can be accurately calculated according to the calculated slope value, the risk of inaccurate calculation under the condition of large opening caused by zero-position voltage learning in the prior art is avoided, and the stability of supercharging control is obviously improved.
Description
Technical Field
The invention belongs to the technical field of engine control, and particularly relates to a self-learning method for a nozzle ring position, and a method and a device for determining the opening degree of a nozzle ring.
Background
The application of the exhaust gas turbocharging technology to the supercharged engine has become mainstream, wherein the electric driving mode of the turbine bypass valve can effectively reduce the pumping loss of the engine, effectively shorten the supercharging delay time and improve the supercharging control stability, so the application is wider.
The bypass valve of the motor-driven turbocharger calculates the opening degree of the bypass valve by the feedback voltage of the rotation angle of the driving motor at the fully closed position and the current position. Due to the reasons of component dispersion of the motor and the transmission mechanism, abrasion deformation of parts in the life cycle and the like, the feedback voltage of the fully closed position of the bypass valve can drift, so that the feedback voltage calculated by the actual position of the bypass valve is inaccurate, and the engine supercharging control is unstable. The variable-section turbocharger uses a nozzle ring instead of a bypass valve, and the calculation of the opening of the nozzle ring is the same as the calculation of the opening of the bypass valve supercharger.
At present, a Control strategy of an Electronic Control Unit (ECU) of an engine is generally adopted to learn a real voltage of a bypass valve at a zero position (a fully closed position), and then, an opening value under different voltages is obtained through correction. However, in an engine mounted on a bypass supercharger, at an opening position close to the full opening, the supercharging effect of the supercharger is not significantly different, but the operating opening range of the nozzle ring supercharger is larger than the bypass valve opening range, and therefore, the deviation increases with the increase of the opening degree by calculating the opening degree of the bypass supercharger or the nozzle ring supercharger using the conventional technique, which causes instability of the supercharging control.
Disclosure of Invention
In view of this, embodiments of the present invention provide a method for self-learning a nozzle ring position, a method for determining a nozzle ring opening, and a device, and aim to solve the problem in the prior art that a deviation becomes larger with an increase in the opening degree due to opening degree calculation, which causes instability of boost control.
To achieve the above object, a first aspect of the embodiments of the present invention provides a method for self-learning a position of a nozzle ring, comprising:
acquiring top dead center feedback voltage of the top dead center position of the nozzle ring machinery; when the upper dead point feedback voltage is within a first preset voltage range, determining that the upper dead point feedback voltage is the voltage when the nozzle ring is fully opened;
acquiring the bottom dead center feedback voltage of the bottom dead center position of the nozzle ring machinery; when the lower dead point feedback voltage is within a second preset voltage range, determining the lower dead point feedback voltage as the full-closed voltage of the nozzle ring;
calculating the slope value of the opening percentage and the voltage of the nozzle ring in the moving range from full-closed to full-open or from full-open to full-closed according to the voltage of the nozzle ring at full-open time and the voltage of the nozzle ring at full-closed time;
and when the slope value is within a preset slope range, determining that the self-learning of the position of the nozzle ring is completed.
As another embodiment of the present application, before the obtaining the top dead center feedback voltage of the top dead center position of the nozzle ring machinery, the method further includes:
and when the engine corresponding to the variable-section turbocharger is in a stop state or a low-speed low-load operation condition, entering a self-learning mode of the position of the nozzle ring.
As another embodiment of the present application, after the obtaining the top dead center feedback voltage of the top dead center position of the nozzle ring machinery, the method further includes:
and when the upper dead center feedback voltage is not in a first preset voltage range, the lower dead center feedback voltage is not in a second preset voltage range or the slope value is not in a preset slope range, exiting the self-learning mode of the nozzle ring position, and determining and reporting the current corresponding fault code according to the nozzle ring diagnosis strategy.
As another embodiment of the present application, the calculating a slope value of a voltage and a percentage of an opening of the nozzle ring in a range of motion from fully closed to fully open or from fully open to fully closed comprises:
according to
Calculating percent opening and voltage of the nozzle ring in the range of motion from full-closed to full-open or full-open to full-closedA slope value;
wherein S represents the slope value of the opening percentage and the voltage in the moving range of the nozzle ring from full close to full open or from full open to full close, VOn the upper partIndicating the voltage, V, of the nozzle ring at full openingLower partRepresenting the voltage at which the nozzle ring is fully off.
A second aspect of the embodiments of the present invention provides a method for determining an opening of a nozzle ring, including:
according to the method for self-learning of the position of the nozzle ring in any one of the embodiments, when the top dead center feedback voltage is within a first preset voltage range, the bottom dead center feedback voltage is within a second preset voltage range and the slope value is within a preset slope range, the voltage when the nozzle ring is fully closed and the slope value of the voltage and the opening percentage of the nozzle ring in the moving range from full-closed to full-open or from full-open to full-closed are determined;
acquiring the actual voltage of the current opening of the nozzle ring;
and calculating the actual opening value of the nozzle ring according to the voltage when the nozzle ring is fully closed, the slope value and the acquired actual voltage of the current opening of the nozzle ring.
As another embodiment of the present application, the method further includes:
when any one condition of the upper dead center feedback voltage not being within a first preset voltage range, the lower dead center feedback voltage not being within a second preset voltage range or the slope value not being within a preset slope range is met, acquiring the voltage when the nozzle ring is fully opened or the voltage when the nozzle ring is fully closed and the slope value which are stored when the self-learning of the position of the nozzle ring is successful for the last time;
and calculating the actual opening value of the nozzle ring according to the acquired voltage when the nozzle ring is fully opened or fully closed when the position of the nozzle ring is learned for the last time successfully, the slope value and the acquired actual voltage of the current opening of the nozzle ring.
As another embodiment of the present application, when any one or more of the conditions that the top dead center feedback voltage is not within a first preset voltage range, the bottom dead center feedback voltage is not within a second preset voltage range, or the slope value is not within a preset slope range is met, obtaining a corresponding parameter from the parameters stored when the self-learning of the position of the nozzle ring is successful last time, wherein the parameter includes a voltage when the nozzle ring is fully opened, a voltage when the nozzle ring is fully closed, or a slope value;
and calculating the actual opening value of the nozzle ring according to the acquired parameters corresponding to the last successful self-learning of the position of the nozzle ring, the parameters successfully determined by the self-learning of the current position of the nozzle ring and the acquired actual voltage of the current opening of the nozzle ring, wherein the acquired parameters corresponding to the self-learning of the current position of the nozzle ring comprise the voltage when the nozzle ring is fully opened or the voltage and the slope value when the nozzle ring is fully closed.
As another embodiment of this application, the calculating the actual opening value of the nozzle ring according to the voltage when the nozzle ring is fully closed or fully opened, the slope value and the obtained actual voltage of the current opening of the nozzle ring includes:
according to K ═ VFruit of Chinese wolfberry-VLower part) S or K ═ VOn the upper part-VFruit of Chinese wolfberry) S, calculating an actual opening value of the nozzle ring;
wherein K represents the actual opening value of the nozzle ring, VFruit of Chinese wolfberryAnd the actual voltage for acquiring the current opening of the nozzle ring is represented.
A third aspect of an embodiment of the present invention provides a device for self-learning a position of a nozzle ring, comprising:
the first acquisition module is used for acquiring the top dead center feedback voltage of the top dead center position of the nozzle ring machinery;
the determining module is used for determining that the upper dead point feedback voltage is the voltage when the nozzle ring is fully opened when the upper dead point feedback voltage is within a first preset voltage range;
the first obtaining module is further used for obtaining a bottom dead center feedback voltage of the bottom dead center position of the nozzle ring machinery;
the determining module is further configured to determine that the bottom dead center feedback voltage is the full-off voltage of the nozzle ring when the bottom dead center feedback voltage is within a second preset voltage range;
the first calculation module is used for calculating the opening percentage and the slope value of the voltage in the moving range of the nozzle ring from full-closed to full-open or from full-open to full-closed according to the voltage when the nozzle ring is fully opened and the voltage when the nozzle ring is fully closed;
the determining module is further used for determining that the self-learning of the position of the nozzle ring is completed when the slope value is within a preset slope range.
A fourth aspect of the embodiments of the present invention provides a device for determining an opening degree of a nozzle ring, including the device for self-learning a position of the nozzle ring according to any one of the embodiments, further including:
the second acquisition module is used for acquiring the actual voltage of the current opening of the nozzle ring;
and the second calculation module is used for calculating the actual opening value of the nozzle ring according to the voltage when the nozzle ring is fully closed, the slope value and the acquired actual voltage of the current opening of the nozzle ring.
Compared with the prior art, the embodiment of the invention has the following beneficial effects: compared with the prior art, the method and the device have the advantages that the upper and lower dead center feedback voltages corresponding to the upper and lower dead center positions of the nozzle ring machinery are respectively obtained, the opening percentage and the voltage slope value in the maximum moving range of the nozzle ring are determined according to the upper and lower dead center feedback voltages, so that the real opening of the nozzle ring of the variable-section turbocharger can be accurately calculated according to the calculated slope value, the calculation accuracy is high, the problem of inaccurate opening calculation caused by scattering of parts or normal abrasion in a life cycle is solved, the risk of inaccurate calculation under the condition of large opening caused by zero voltage learning in the prior art is avoided, and the stability of pressurization control is obviously improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic flow chart of an implementation of a method for self-learning a position of a nozzle ring according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating a method for determining the opening of a nozzle ring according to another embodiment of the present invention;
FIG. 3 is a schematic illustration of a variable area turbine nozzle ring position calculation provided by an embodiment of the present invention;
FIG. 4 is an exemplary diagram of an apparatus for self-learning nozzle ring position provided by an embodiment of the present invention;
FIG. 5 is a schematic view of a device for self-learning nozzle ring position provided in accordance with another embodiment of the present invention;
FIG. 6 is an exemplary illustration of an apparatus for determining nozzle ring opening provided by an embodiment of the present invention;
FIG. 7 is a schematic view of an apparatus for determining nozzle ring opening provided in accordance with another embodiment of the present invention;
fig. 8 is a schematic diagram of a terminal device according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
Fig. 1 is a schematic flow chart of an implementation of a method for self-learning a position of a nozzle ring according to an embodiment of the present invention, which is described in detail below.
101, acquiring top dead center feedback voltage of the top dead center position of a nozzle ring machine; and when the upper dead point feedback voltage is within a first preset voltage range, determining the upper dead point feedback voltage as the voltage when the nozzle ring is fully opened.
Optionally, as shown in fig. 2, before obtaining the top dead center feedback voltage of the top dead center position of the nozzle ring machinery in this step, the method may further include:
the ECU detects whether the operation condition of an engine corresponding to the variable-section turbocharger is in a stop state or a low-speed and low-load operation condition; when the engine is in a stop state or a low-speed low-load operation condition, entering a self-learning mode of the position of the nozzle ring; and when the engine is not in a stop state or a low-speed and low-load operation condition, the self-learning mode of the position of the nozzle ring is not entered, the current operation condition is reported, and the operation condition of the engine is continuously detected.
Optionally, after entering the self-learning mode of the nozzle ring position, the ECU controls the driving motor to push the pull rod by outputting the duty ratio of the driving motor, so that the pull rod reaches the mechanical top dead center position of the nozzle ring, and the mechanical top dead center position of the nozzle ring is the maximum position of the opening of the nozzle ring. At this time, the ECU obtains the feedback voltage, and after obtaining the top dead center feedback voltage of the top dead center position of the nozzle ring mechanism, the following operations may be further performed, as shown in fig. 2:
detecting whether the upper stop point feedback voltage is in a first preset voltage range; optionally, the first preset voltage range is a reasonable voltage range of the top dead center feedback voltage.
And when the upper dead point feedback voltage is within a first preset voltage range, determining the upper dead point feedback voltage as the voltage when the nozzle ring is fully opened, and storing the voltage when the nozzle ring is fully opened. Optionally, voltage when the nozzle ring is opened totally is the voltage value that the nozzle ring maximum aperture corresponds, and voltage storage when opening the nozzle ring is full in ECU.
And when the upper stop point feedback voltage is not in a first preset voltage range, exiting the self-learning mode of the nozzle ring position, and determining and reporting the current corresponding fault code according to the nozzle ring diagnosis strategy.
Optionally, when the upper dead center feedback voltage is not within the first preset voltage range, a current first fault code may be determined according to a voltage diagnosis strategy when the nozzle ring is fully opened, and the first fault code is reported, so that a worker may determine a fault cause according to the first fault code and perform subsequent maintenance or debugging.
102, acquiring a bottom dead center feedback voltage of the bottom dead center position of the nozzle ring machinery; and when the lower dead point feedback voltage is in a second preset voltage range, determining the lower dead point feedback voltage as the voltage when the nozzle ring is completely closed.
Optionally, the ECU controls the driving motor to push the pull rod by outputting the duty ratio of the driving motor, so that the pull rod reaches the position of the nozzle ring mechanical bottom dead center, and the position of the nozzle ring mechanical bottom dead center is the minimum position of the nozzle ring opening. At this time, the ECU acquires the feedback voltage of the bottom dead center position, and after acquiring the feedback voltage of the bottom dead center position of the nozzle ring mechanism, the following operations may be further performed, as shown in fig. 2:
detecting whether the feedback voltage of the lower dead point is in a second preset voltage range or not; optionally, the second preset voltage range is a reasonable voltage range of the bottom dead center feedback voltage.
When the lower dead point feedback voltage is within a second preset voltage range, determining the lower dead point feedback voltage as the full-off voltage of the nozzle ring, and storing the full-off voltage of the nozzle ring. Optionally, the voltage when the nozzle ring is totally closed is the voltage value that the minimum aperture of nozzle ring corresponds, and the voltage when the nozzle ring is totally closed is stored in ECU.
And when the lower dead point feedback voltage is not in a second preset voltage range, exiting the self-learning mode of the nozzle ring position, and determining and reporting the current corresponding fault code according to the nozzle ring diagnosis strategy.
Optionally, when the bottom dead center feedback voltage is not within the second preset voltage range, a current second fault code may be determined according to a voltage diagnosis strategy when the nozzle ring is fully closed, and the second fault code is reported, so that a worker may determine a fault reason according to the second fault code and perform subsequent maintenance or debugging.
It should be noted that the order of step 101 and step 102 is not limited, and may be executed according to the order of step 101 and step 102, or may be executed after step 102 and then step 101.
And 103, calculating the opening percentage and the slope value of the voltage of the nozzle ring in the moving range from full-closed to full-open or from full-open to full-closed according to the full-open voltage of the nozzle ring and the full-closed voltage of the nozzle ring.
Optionally, after acquiring the voltage when the nozzle ring is fully opened and the voltage when the nozzle ring is fully closed, the voltage can be obtained according to
And calculating the slope value of the opening percentage and the voltage in the moving range of the nozzle ring from full close to full open or from full open to full close, and calculating the position of the nozzle ring of the variable cross-section turbine shown in a schematic diagram of a calculation principle of the nozzle ring of the variable cross-section turbine shown in the figure 3.
Wherein S represents the slope value of the opening percentage and the voltage in the moving range of the nozzle ring from full close to full open or from full open to full close, VOn the upper partIndicating the voltage, V, of the nozzle ring at full openingLower partRepresenting the voltage at which the nozzle ring is fully off.
And 104, when the slope value is within a preset slope range, determining that the self-learning of the position of the nozzle ring is finished.
Optionally, before this step, the method may further include:
detecting whether the slope value is within a preset slope range or not;
and when the slope value is within a preset slope range, determining that the self-learning of the position of the nozzle ring is finished and storing the slope value, so that the currently stored slope value can be obtained to calculate the actual opening value of the nozzle ring when the self-learning mode of the position of the nozzle ring is unsuccessful next time.
And when the slope value is not in the preset slope range, exiting the self-learning mode of the nozzle ring position, and determining and reporting the current corresponding fault code according to the nozzle ring diagnosis strategy.
When the slope value is not within the preset slope range, the current third fault code can be determined according to the slope diagnosis strategy setting, and the third fault code is reported, so that the worker can determine the fault reason according to the third fault code and carry out subsequent maintenance or debugging.
Optionally, the purpose of calculating the slope value is to calculate the actual opening value of the nozzle ring, and when the self-learning of the current position of the nozzle ring is successful, the actual opening value of the nozzle ring can be directly calculated according to the voltage when the nozzle ring is fully closed or the voltage and the slope value when the nozzle ring is fully opened, which are determined by the self-learning of the position of the nozzle ring. When the self-learning of the nozzle ring position fails, the calculation of the actual opening value of the nozzle ring can be performed according to the following manner:
(1) when any one condition of the upper dead center feedback voltage not being within a first preset voltage range, the lower dead center feedback voltage not being within a second preset voltage range or the slope value not being within a preset slope range is met, the self-learning mode of the nozzle ring position is exited, and the voltage when the nozzle ring is fully opened or the voltage and the slope value when the nozzle ring is fully closed, which are stored when the self-learning of the nozzle ring position is successful last time, can be obtained;
and calculating the actual opening value of the nozzle ring according to the acquired voltage when the nozzle ring is fully opened or fully closed when the position of the nozzle ring is learned for the last time successfully, the slope value and the acquired actual voltage of the current opening of the nozzle ring.
(2) When any one or more conditions that the top dead center feedback voltage is not in a first preset voltage range, the bottom dead center feedback voltage is not in a second preset voltage range or the slope value is not in a preset slope range are met, corresponding parameters are obtained from parameters stored when self-learning of the position of the nozzle ring is successful last time, wherein the parameters comprise the voltage when the nozzle ring is fully opened, the voltage when the nozzle ring is fully closed or the slope value;
and calculating the actual opening value of the nozzle ring according to the acquired parameters corresponding to the last successful self-learning of the position of the nozzle ring, the parameters successfully determined by the self-learning of the current position of the nozzle ring and the acquired actual voltage of the current opening of the nozzle ring, wherein the acquired parameters corresponding to the self-learning of the current position of the nozzle ring comprise the voltage when the nozzle ring is fully opened or the voltage and the slope value when the nozzle ring is fully closed.
According to the method for self-learning the position of the nozzle ring, the upper and lower dead point feedback voltages corresponding to the upper and lower dead points of the nozzle ring machinery are respectively obtained, the aperture percentage and the slope value of the voltage in the maximum moving range of the nozzle ring are determined according to the upper and lower dead point feedback voltages, when the slope value is in the preset slope range, the self-learning of the position of the nozzle ring is completed, the voltage and the slope value when the nozzle ring is completely closed are determined through the self-learning, the calculation accuracy of the real aperture of the nozzle ring of the variable-section turbocharger can be improved, the problem that the aperture is inaccurate due to dispersion of parts or normal wear in the life cycle is solved, the risk that the calculation of the real aperture of the nozzle ring is inaccurate under the large aperture caused by only aiming at zero voltage learning is avoided, and the stability of pressurization control is obviously improved.
As shown in fig. 2, the present application further provides a method for determining the opening degree of the nozzle ring, which includes a method for self-learning the position of the nozzle ring provided according to any of the above embodiments, and when the top dead center feedback voltage is within a first preset voltage range, the bottom dead center feedback voltage is within a second preset voltage range, and the slope value is within a preset slope range, the voltage when the nozzle ring is fully closed and the slope value of the voltage and the percentage of the opening degree of the nozzle ring in the moving range from fully closed to fully open or from fully open to fully closed are determined; further comprising:
acquiring the actual voltage of the current opening of the nozzle ring;
and calculating the actual opening value of the nozzle ring according to the voltage when the nozzle ring is fully closed or fully opened, the slope value and the acquired actual voltage of the current opening of the nozzle ring.
Optionally, when the self-learning of the current nozzle ring position is successful, the actual opening value of the nozzle ring can be directly calculated according to the voltage when the nozzle ring is fully closed or fully open and the slope value determined by the self-learning of the nozzle ring position. When the self-learning of the nozzle ring position fails, the calculation of the actual opening value of the nozzle ring can be performed according to the following manner:
(1) when any one condition of the upper dead center feedback voltage not being within a first preset voltage range, the lower dead center feedback voltage not being within a second preset voltage range or the slope value not being within a preset slope range is met, exiting from the nozzle ring position self-learning mode, and at the moment, acquiring the voltage when the nozzle ring is fully opened or fully closed and the slope value, which are stored when the nozzle ring position self-learning is successful last time;
and calculating the actual opening value of the nozzle ring according to the acquired voltage when the nozzle ring is fully opened or fully closed when the position of the nozzle ring is learned for the last time successfully, the slope value and the acquired actual voltage of the current opening of the nozzle ring.
(2) When any one or more conditions of the upper dead center feedback voltage not in a first preset voltage range, the lower dead center feedback voltage not in a second preset voltage range or the slope value not in a preset slope range are met, corresponding parameters are obtained from parameters stored when self-learning of the position of the nozzle ring is successful last time, wherein the parameters comprise the voltage when the nozzle ring is fully opened, the voltage when the nozzle ring is fully closed or the slope value;
and calculating the actual opening value of the nozzle ring according to the acquired parameters corresponding to the last successful self-learning of the position of the nozzle ring, the parameters successfully determined by the self-learning of the current position of the nozzle ring and the acquired actual voltage of the current opening of the nozzle ring, wherein the acquired parameters corresponding to the self-learning of the current position of the nozzle ring comprise the voltage when the nozzle ring is fully opened or fully closed and the acquired slope value.
For example, when the top dead center feedback voltage is not in a first preset voltage range and the bottom dead center feedback voltage is in a second preset voltage range, the voltage when the nozzle ring is fully opened is obtained from parameters stored when self-learning of the position of the nozzle ring succeeds last time, then according to the obtained voltage when the nozzle ring is fully opened and the voltage when the nozzle ring is fully closed determined by self-learning of the position of the nozzle ring, the opening percentage and the slope value of the voltage in the moving range from full-closed to full-open or from full-open to full-closed of the nozzle ring are calculated, whether the calculated slope value is in a preset slope range is detected, and when the calculated slope value is in the preset slope range, the actual opening value of the nozzle ring is calculated according to the slope value and the determined voltage when the nozzle ring is fully closed. And when the calculated slope value is not in the preset slope range, obtaining the slope value from the parameters stored when the self-learning of the position of the nozzle ring is successful last time, and then calculating the actual opening value of the nozzle ring according to the slope value and the determined voltage when the nozzle ring is fully closed.
Similarly, when the feedback voltage of the top dead center is in a first preset voltage range and the feedback voltage of the bottom dead center is not in a second preset voltage range, the voltage of the nozzle ring when the nozzle ring is fully closed is obtained from parameters stored when the self-learning of the position of the nozzle ring succeeds last time, then the opening percentage and the slope value of the voltage in the moving range of the nozzle ring from full closing to full opening or from full opening to full closing are calculated according to the obtained voltage of the nozzle ring when the nozzle ring is fully closed and the self-learning determined voltage of the position of the nozzle ring when the nozzle ring is fully opened, and whether the calculated slope value is in a preset slope range is detected. When the inclination is within the preset inclination range, the actual opening value of the nozzle ring is calculated according to the inclination value and the determined voltage when the nozzle ring is fully opened. And when the calculated slope value is not in the preset slope range, obtaining the slope value from the parameters stored when the self-learning of the position of the nozzle ring is successful last time, and then calculating the actual opening value of the nozzle ring according to the slope value and the determined voltage when the nozzle ring is fully opened.
It should be noted that in calculating the actual opening value of the nozzle ring, the actual opening value of the nozzle ring may be calculated based on a value determined when the current nozzle ring position self-learning succeeds, for the selection of the voltage when the nozzle ring is fully closed or the voltage when the nozzle ring is fully open. When the top dead center feedback voltage is within a first preset voltage range, calculating the actual opening value of the nozzle ring according to the voltage when the nozzle ring is fully opened, the slope value and the acquired actual voltage of the current opening of the nozzle ring; and calculating the actual opening value of the nozzle ring according to the voltage when the nozzle ring is fully closed, the slope value and the acquired actual voltage of the current opening of the nozzle ring when the feedback voltage of the bottom dead center is within a second preset voltage range.
Alternatively, when the engine runs to a supercharging area, the ECU can calculate the actual opening value of the nozzle ring of the variable-section turbocharger according to the position voltage of the self-learning model and the opening voltage under the working condition. Calculating the actual opening value of the nozzle ring according to the voltage when the nozzle ring is fully closed or fully opened, the slope value and the obtained actual voltage of the current opening of the nozzle ring, as shown in fig. 3, may include:
according to K ═ VFruit of Chinese wolfberry-VLower part) S or K ═ VOn the upper part-VFruit of Chinese wolfberry) S, calculating an actual opening value of the nozzle ring;
wherein K represents the actual opening value of the nozzle ring, VFruit of Chinese wolfberryAnd the actual voltage for acquiring the current opening of the nozzle ring is represented.
According to the method for determining the opening degree of the nozzle ring, the voltage when the nozzle ring is fully closed or fully opened and the opening percentage and the slope value of the voltage in the maximum moving range of the nozzle ring are obtained, the actual opening degree value of the nozzle ring is calculated according to the voltage when the nozzle ring is fully closed or fully opened, the slope value and the obtained actual voltage of the current opening degree of the nozzle ring, so that the actual opening degree of the nozzle ring of the variable-section turbocharger can be accurately calculated, the problem that the opening degree calculation is inaccurate due to the dispersion of parts or normal wear in the life cycle is solved, the risk that the calculation is inaccurate under the large opening degree caused by the learning of zero-position voltage is avoided, and the stability of pressurization control is obviously improved.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
Corresponding to the method for controlling the opening degree of the nozzle ring based on the variable-area turbocharger described in the above embodiment, fig. 4 is an exemplary diagram of a device for self-learning the position of the nozzle ring provided by the embodiment of the invention. As shown in fig. 4, the apparatus may include: a first obtaining module 401, a determining module 402 and a first calculating module 403.
A first obtaining module 401, configured to obtain a top dead center feedback voltage at a top dead center position of a nozzle ring machine;
a determining module 402, configured to determine, when the top dead center feedback voltage is within a first preset voltage range, that the top dead center feedback voltage is a voltage when the nozzle ring is fully open;
the first obtaining module 401 is further configured to obtain a bottom dead center feedback voltage of a bottom dead center position of the nozzle ring machinery;
the determining module 402 is further configured to determine the bottom dead center feedback voltage as a full-off voltage of the nozzle ring when the bottom dead center feedback voltage is within a second preset voltage range;
a first calculation module 403, configured to calculate a slope value of an opening percentage and a voltage in a moving range from full-closed to full-open or from full-open to full-closed of the nozzle ring according to the voltage when the nozzle ring is fully open and the voltage when the nozzle ring is fully closed;
the determining module 402 is further configured to determine that the self-learning of the nozzle ring position is completed when the slope value is within a preset slope range.
Optionally, as shown in fig. 5, the device for controlling the opening of the nozzle ring based on the variable-area turbocharger further includes a detecting module 404 and a sending module 405.
The detecting module 404 is configured to detect whether an operating condition of an engine corresponding to the variable-section turbocharger is in a shutdown state or a low-speed and low-load operating condition before the top dead center feedback voltage at the top dead center position of the nozzle ring machinery is obtained;
the determining module 402 is further configured to enter a self-learning mode of nozzle ring position when the engine is in a shutdown state or a low-speed and low-load operating condition;
when the engine is not in a shutdown state or a low speed and low load operating condition, the sending module 405 reports the current operating condition and continues to detect the operating condition of the engine by the detecting module 404.
Optionally, after the top dead center feedback voltage of the top dead center position of the nozzle ring machinery is obtained, the detecting module 404 is further configured to detect whether the top dead center feedback voltage is within a first preset voltage range;
optionally, when the top dead center feedback voltage is not within a first preset voltage range, the bottom dead center feedback voltage is not within a second preset voltage range, or the slope value is not within a preset slope range, exiting the nozzle ring position self-learning mode, and determining and reporting a current corresponding fault code according to a nozzle ring diagnosis strategy. The nozzle ring opening control device, for example based on a variable area turbocharger, may further comprise a storage module 406 and an exit module 407.
When the top dead center feedback voltage is within a first preset voltage range, the determining module 402 determines that the top dead center feedback voltage is the full-open voltage of the nozzle ring, and the storing module 406 stores the full-open voltage of the nozzle ring;
when the top dead center feedback voltage is not within the first preset voltage range, the exit module 407 exits the nozzle ring position self-learning mode, and the determination module 402 is further configured to determine a current first fault code according to a voltage diagnosis strategy when the nozzle ring is fully opened, and the sending module 405 reports the first fault code.
Optionally, after the bottom dead center feedback voltage of the bottom dead center position of the nozzle ring machinery is obtained, the detecting module 401 is further configured to detect whether the bottom dead center feedback voltage is within a second preset voltage range;
when the bottom dead center feedback voltage is within a second preset voltage range, the determining module 402 determines that the bottom dead center feedback voltage is the nozzle ring fully-off voltage, and the storing module 406 stores the nozzle ring fully-off voltage;
when the bottom dead center feedback voltage is not within the second preset voltage range, the exit module 407 exits the nozzle ring position self-learning mode, and the determination module 402 is further configured to determine a current second fault code according to a nozzle ring full-off voltage diagnosis strategy, and the sending module 405 reports the second fault code.
Optionally, before the current slope value is within the preset slope range, the detecting module 404 is further configured to detect whether the slope value is within the preset slope range;
when the slope value is within a preset slope range, the storage module 406 stores the slope value;
when the slope value is not within the preset slope range, the exit module 407 exits the nozzle ring position self-learning mode, and the determination module 402 is further configured to determine a current third fault code according to the slope diagnostic policy setting, and the sending module 405 reports the third fault code.
Optionally, the first calculation module 403, when calculating the slope value of the voltage and the opening percentage of the nozzle ring in the moving range from full close to full open or from full open to full close, may be configured to:
according to S ═ VOn the upper part1-VLower partX 100%, calculating the slope value of the opening percentage and the voltage in the moving range of the nozzle ring from full close to full open or from full open to full close;
wherein S represents the slope value of the opening percentage and the voltage in the moving range of the nozzle ring from full close to full open or from full open to full close, VOn the upper partIndicating the voltage, V, of the nozzle ring at full openingLower partRepresenting the voltage at which the nozzle ring is fully off.
According to the device for self-learning the position of the nozzle ring, the upper and lower dead center feedback voltages corresponding to the upper and lower dead center positions of the nozzle ring machinery are respectively obtained through the obtaining module, the opening percentage and the voltage slope value in the maximum moving range of the nozzle ring are determined by the calculating module according to the upper and lower dead center feedback voltages, and when the slope value is within the preset slope range, the determining module determines to complete self-learning of the position of the nozzle ring. The method has the advantages that the calculation accuracy of the real opening degree of the nozzle ring of the variable-section turbocharger can be improved through self-learning of the determined voltage and slope value when the nozzle ring is completely closed, the problem of inaccurate opening degree calculation caused by dispersion of parts or normal abrasion in a life cycle is solved, the risk of inaccurate calculation of the real opening degree of the nozzle ring under the large opening degree caused by only zero-position voltage learning is avoided, and the stability of pressurization control is obviously improved.
The embodiment also provides a device for determining the opening degree of the nozzle ring, and as shown in fig. 6 or fig. 7, on the basis of the device for self-learning the position of the nozzle ring, the device further comprises a second obtaining module 601 and a second calculating module 602.
According to the self-learning device for the nozzle ring position provided in any of the embodiments, as shown in fig. 4 and 5, when the top dead center feedback voltage is within a first preset voltage range, the bottom dead center feedback voltage is within a second preset voltage range, and the slope value is within a preset slope range, the voltage when the nozzle ring is fully closed and the slope value of the voltage and the percentage of the opening of the nozzle ring in the moving range from full-closed to full-open or from full-open to full-closed can be determined;
the second obtaining module 601 is configured to obtain an actual voltage of a current opening of the nozzle ring;
the second calculation module 602 is configured to calculate an actual opening value of the nozzle ring according to the voltage when the nozzle ring is fully closed or fully opened, the slope value, and the obtained actual voltage of the current opening of the nozzle ring.
Optionally, when any one of the conditions that the top dead center feedback voltage is not within a first preset voltage range, the bottom dead center feedback voltage is not within a second preset voltage range, or the slope value is not within a preset slope range is met, the second obtaining module 601 is configured to obtain the voltage when the nozzle ring is fully opened or the voltage when the nozzle ring is fully closed and the slope value, which are stored when the self-learning of the nozzle ring position is successful last time;
the second calculating module 602 is configured to calculate an actual opening value of the nozzle ring according to the acquired voltage when the nozzle ring is fully opened or the acquired voltage when the nozzle ring is fully closed when the self-learning of the position of the nozzle ring is successful last time, the slope value, and the acquired actual voltage of the current opening of the nozzle ring.
Optionally, when any one or more of the conditions that the top dead center feedback voltage is not within a first preset voltage range, the bottom dead center feedback voltage is not within a second preset voltage range, or the slope value is not within a preset slope range is met, the second obtaining module 601 is configured to obtain a corresponding parameter from the parameters stored when the self-learning of the position of the nozzle ring is successful last time, where the parameter includes a voltage when the nozzle ring is fully opened, a voltage when the nozzle ring is fully closed, or a slope value;
and a second calculation module 602, configured to calculate an actual opening value of the nozzle ring according to the obtained parameter corresponding to the last successful self-learning of the nozzle ring position, the parameter successfully determined by the current self-learning of the nozzle ring position, and the obtained actual voltage of the current opening of the nozzle ring, where the obtained corresponding parameter and the obtained parameter successfully determined by the current self-learning of the nozzle ring position include a voltage when the nozzle ring is fully opened or a voltage and a slope value when the nozzle ring is fully closed.
Optionally, the second calculating module 602 may calculate the K ═ V according to K ═ VFruit of Chinese wolfberry-VLower part) S or K ═ VOn the upper part-VFruit of Chinese wolfberry) S, calculating an actual opening value of the nozzle ring; wherein K represents the actual opening value of the nozzle ring, VFruit of Chinese wolfberryAnd the actual voltage for acquiring the current opening of the nozzle ring is represented.
According to the device for determining the opening degree of the nozzle ring, the upper and lower dead center feedback voltages corresponding to the upper and lower dead center positions of the nozzle ring machinery are obtained through the respective obtaining modules, the calculating module determines the opening percentage and the voltage slope value within the maximum moving range of the nozzle ring according to the upper and lower dead center feedback voltages, and then the second obtaining module obtains the actual voltage of the current opening degree of the nozzle ring; according to the voltage when the nozzle ring is fully closed, the slope value and the acquired actual voltage of the current opening of the nozzle ring, the second calculation module calculates the actual opening value of the nozzle ring, so that the actual opening of the nozzle ring of the variable-section turbocharger can be accurately calculated, the problem of inaccurate opening calculation caused by dispersion of parts or normal abrasion in a life cycle is solved, the risk of inaccurate calculation under large opening caused by only zero-position voltage learning is avoided, and the stability of pressurization control is obviously improved.
Fig. 8 is a schematic diagram of a terminal device according to an embodiment of the present invention. As shown in fig. 8, the terminal apparatus 800 of this embodiment includes: a processor 801, a memory 802 and a computer program 803 stored in said memory 802 and operable on said processor 801, such as a program for self-learning of nozzle ring position or a program for nozzle ring opening determination. The processor 801 executes the computer program 803 to implement the steps in the above-mentioned method embodiment of nozzle ring position self-learning, such as the steps shown in fig. 1 and fig. 2, and the processor 801 executes the computer program 803 to implement the functions of the modules in the above-mentioned device embodiments, such as the functions of the modules shown in fig. 4 and the functions of the modules shown in fig. 5. The processor 801 executes the computer program 803 to implement the steps in the above-described method embodiment for determining the nozzle ring opening, such as the steps shown in fig. 2, and the processor 801 executes the computer program 803 to implement the functions of the modules in the above-described device embodiments, such as the functions of the modules shown in fig. 6 and the functions of the modules shown in fig. 7.
Illustratively, the computer program 803 may be partitioned into one or more program modules that are stored in the memory 802 and executed by the processor 801 to implement the present invention. The one or more program modules may be a series of computer program instruction segments capable of performing specific functions for describing the execution of the computer program 803 in the means for self-learning the nozzle ring position, the means for determining nozzle ring opening, or the terminal device 800. For example, the computer program 803 may be divided into the first obtaining module 401, the determining module 402, and the first calculating module 403, and specific functions of the modules are shown in fig. 4, which is not described herein again. For example, the computer program 803 may be divided into modules included in the apparatus for self-learning the nozzle ring position, and further include a second obtaining module 601 and a second calculating module 602, and specific functions of the modules are shown in fig. 6 or fig. 7, which are not described in detail herein.
The terminal device 800 may be a desktop computer, a notebook, a palm computer, a cloud server, or other computing devices. The terminal device may include, but is not limited to, a processor 801, a memory 802. Those skilled in the art will appreciate that fig. 8 is merely an example of a terminal device 800 and does not constitute a limitation of terminal device 800 and may include more or fewer components than shown, or some components may be combined, or different components, e.g., the terminal device may also include input-output devices, network access devices, buses, etc.
The Processor 801 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The storage 802 may be an internal storage unit of the terminal device 800, such as a hard disk or a memory of the terminal device 800. The memory 802 may also be an external storage device of the terminal device 800, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like provided on the terminal device 800. Further, the memory 802 may also include both an internal storage unit and an external storage device of the terminal apparatus 800. The memory 802 is used for storing the computer programs and other programs and data required by the terminal device 800. The memory 802 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other ways. For example, the above-described embodiments of the apparatus/terminal device are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow of the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method embodiments may be implemented. . Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media does not include electrical carrier signals and telecommunications signals as is required by legislation and patent practice.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (9)
1. A method of self-learning nozzle ring position, comprising:
when an engine corresponding to the variable-section turbocharger is in a low-speed low-load operation condition, entering a self-learning mode of the position of the nozzle ring;
acquiring top dead center feedback voltage of the top dead center position of the nozzle ring machinery; when the upper dead point feedback voltage is within a first preset voltage range, determining that the upper dead point feedback voltage is the voltage when the nozzle ring is fully opened;
acquiring the bottom dead center feedback voltage of the bottom dead center position of the nozzle ring machinery; when the lower dead point feedback voltage is within a second preset voltage range, determining the lower dead point feedback voltage as the full-closed voltage of the nozzle ring;
calculating the slope value of the opening percentage and the voltage of the nozzle ring in the moving range from full-closed to full-open or from full-open to full-closed according to the voltage of the nozzle ring at full-open time and the voltage of the nozzle ring at full-closed time;
when the slope value is within a preset slope range, determining that the self-learning of the position of the nozzle ring is finished;
and when the upper dead center feedback voltage is not in a first preset voltage range, the lower dead center feedback voltage is not in a second preset voltage range or the slope value is not in a preset slope range, exiting the self-learning mode of the nozzle ring position, and determining and reporting the current corresponding fault code according to the nozzle ring diagnosis strategy.
2. The method of self-learning nozzle ring position of claim 1, wherein entering the condition of the nozzle ring position self-learning mode further comprises:
the engine corresponding to the variable-area turbocharger is in a stopped state.
3. The method for self-learning of nozzle ring position of claim 1, wherein said calculating a slope value of voltage as a percentage of opening of the nozzle ring in a range of motion from fully closed to fully open or from fully open to fully closed comprises:
according to
Calculating a slope value of voltage and percentage of opening of the nozzle ring in a moving range from full-closed to full-open or from full-open to full-closed;
wherein S represents the slope value of the opening percentage and the voltage in the moving range of the nozzle ring from full close to full open or from full open to full close, VOn the upper partIndicating the voltage, V, of the nozzle ring at full openingLower partRepresenting the voltage at which the nozzle ring is fully off.
4. A method of determining nozzle ring opening, comprising:
a method of self-learning of nozzle ring position as claimed in any one of claims 1 to 3, determining the voltage at full nozzle ring closing and the slope value of the voltage and percentage of opening of the nozzle ring in the range of motion from full closed to full open or from full open to full closed when the top dead centre feedback voltage is within a first predetermined voltage range, the bottom dead centre feedback voltage is within a second predetermined voltage range and the slope value is within a predetermined slope range;
acquiring the actual voltage of the current opening of the nozzle ring;
and calculating the actual opening value of the nozzle ring according to the voltage when the nozzle ring is fully closed or fully opened, the slope value and the acquired actual voltage of the current opening of the nozzle ring.
5. The method of nozzle ring opening determination of claim 4, further comprising:
when any one condition of the upper dead center feedback voltage not being within a first preset voltage range, the lower dead center feedback voltage not being within a second preset voltage range or the slope value not being within a preset slope range is met, acquiring the voltage when the nozzle ring is fully opened or the voltage when the nozzle ring is fully closed and the slope value which are stored when the self-learning of the position of the nozzle ring is successful for the last time;
and calculating the actual opening value of the nozzle ring according to the acquired voltage when the nozzle ring is fully opened or fully closed when the position of the nozzle ring is learned for the last time successfully, the slope value and the acquired actual voltage of the current opening of the nozzle ring.
6. The method of nozzle ring opening determination of claim 4,
when any one or more conditions of the upper dead center feedback voltage not in a first preset voltage range, the lower dead center feedback voltage not in a second preset voltage range or the slope value not in a preset slope range are met, corresponding parameters are obtained from parameters stored when self-learning of the position of the nozzle ring is successful last time, wherein the parameters comprise the voltage when the nozzle ring is fully opened, the voltage when the nozzle ring is fully closed or the slope value;
and calculating the actual opening value of the nozzle ring according to the acquired parameters corresponding to the last successful self-learning of the position of the nozzle ring, the parameters successfully determined by the self-learning of the current position of the nozzle ring and the acquired actual voltage of the current opening of the nozzle ring, wherein the acquired parameters corresponding to the self-learning of the current position of the nozzle ring comprise the voltage when the nozzle ring is fully opened or the voltage and the slope value when the nozzle ring is fully closed.
7. The method of nozzle ring opening determination of claim 4, wherein said calculating an actual opening value of the nozzle ring based on the voltage at full-off or full-on of the nozzle ring, the slope value, and the obtained actual voltage of the current opening of the nozzle ring comprises:
according to K ═ VFruit of Chinese wolfberry-VLower part) S or K ═ VOn the upper part-VFruit of Chinese wolfberry) S, calculating an actual opening value of the nozzle ring;
wherein K represents the actual opening value of the nozzle ring, VFruit of Chinese wolfberryAnd the actual voltage for acquiring the current opening of the nozzle ring is represented.
8. A device that nozzle ring position is self-learning, characterized by, includes:
the determining module is used for entering a self-learning mode of the position of the nozzle ring when an engine corresponding to the variable-section turbocharger is in a low-speed low-load operation condition;
the first acquisition module is used for acquiring the top dead center feedback voltage of the top dead center position of the nozzle ring machinery;
the determining module is further configured to determine that the top dead center feedback voltage is a voltage when the nozzle ring is fully opened when the top dead center feedback voltage is within a first preset voltage range;
the first obtaining module is further used for obtaining a bottom dead center feedback voltage of the bottom dead center position of the nozzle ring machinery;
the determining module is further configured to determine that the bottom dead center feedback voltage is the full-off voltage of the nozzle ring when the bottom dead center feedback voltage is within a second preset voltage range;
the first calculation module is used for calculating the opening percentage and the slope value of the voltage in the moving range of the nozzle ring from full-closed to full-open or from full-open to full-closed according to the voltage when the nozzle ring is fully opened and the voltage when the nozzle ring is fully closed;
the determining module is further used for determining that the self-learning of the position of the nozzle ring is completed when the slope value is within a preset slope range;
the self-learning control device further comprises an exit module, wherein the exit module is used for exiting the self-learning mode of the position of the nozzle ring when the upper dead center feedback voltage is not in a first preset voltage range, the lower dead center feedback voltage is not in a second preset voltage range or the slope value is not in a preset slope range;
the determining module is further used for determining and reporting the current corresponding fault code according to the nozzle ring diagnosis strategy.
9. An apparatus for determining nozzle ring opening, comprising the apparatus for self-learning nozzle ring position of claim 8, further comprising:
the second acquisition module is used for acquiring the actual voltage of the current opening of the nozzle ring;
and the second calculation module is used for calculating the actual opening value of the nozzle ring according to the voltage when the nozzle ring is fully closed, the slope value and the acquired actual voltage of the current opening of the nozzle ring.
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| CN202010386862.8A CN112832874B (en) | 2020-05-09 | 2020-05-09 | Nozzle ring position self-learning method and nozzle ring opening determining method and device |
| PCT/CN2021/092491 WO2021228002A1 (en) | 2020-05-09 | 2021-05-08 | Nozzle ring position self-learning method, and method and apparatus for determining opening degree of nozzle ring |
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| CN202010386862.8A CN112832874B (en) | 2020-05-09 | 2020-05-09 | Nozzle ring position self-learning method and nozzle ring opening determining method and device |
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| JP2005171893A (en) * | 2003-12-11 | 2005-06-30 | Toyota Motor Corp | Supercharging pressure control device |
| CN101387236B (en) * | 2008-11-03 | 2010-06-23 | 北京汽车研究总院有限公司 | Variable nozzle turbocharging control method and system |
| MX359092B (en) * | 2013-02-22 | 2018-09-14 | Nissan Motor | Device and method for controlling internal combustion engine. |
| CN103206301B (en) * | 2013-04-18 | 2015-04-08 | 萍乡市德博科技发展有限公司 | Turbocharged direct-current electric actuating mechanism and method for automatically controlling blade openness thereof |
| CN105736161B (en) * | 2016-02-04 | 2018-06-08 | 潍柴动力股份有限公司 | A kind of pressure booster with variable cross section nozzle ring method of actuator control |
| CN106194447B (en) * | 2016-08-19 | 2017-06-20 | 安徽航瑞航空动力装备有限公司 | Electronic Throttle Control method and its throttle system |
| CN107339153A (en) * | 2016-11-29 | 2017-11-10 | 凤城市合鑫机械制造有限公司 | Turbine supercharger nozzle ring electronic-controlled installation with position signalling feedback function |
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