CN109723541B - Self-learning method for air discharge characteristic of electronic control air discharge valve, electronic control unit and internal combustion engine - Google Patents
Self-learning method for air discharge characteristic of electronic control air discharge valve, electronic control unit and internal combustion engine Download PDFInfo
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- CN109723541B CN109723541B CN201811628940.XA CN201811628940A CN109723541B CN 109723541 B CN109723541 B CN 109723541B CN 201811628940 A CN201811628940 A CN 201811628940A CN 109723541 B CN109723541 B CN 109723541B
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Abstract
The embodiment of the invention discloses a self-learning method for the air release characteristic of an Electronic Control Unit (ECU) and an internal combustion engine, which is implemented by acquiring the air release characteristic relation between different pressure values of an air release valve and the displacement of a push rod in a preset period and updating the acquired air release characteristic relation into electronic control equipment, so that the problem that when air is released through an air release characteristic curve, the change of the spring coefficient due to overlong use time of a spring in the electronic control air release valve cannot accurately control a waste gas bypass valve of a supercharger in the internal combustion engine is solved.
Description
Technical Field
The invention relates to the technical field of internal combustion engines, in particular to a self-learning method for the air discharge characteristic of an electronic control air discharge valve, an electronic control unit and an internal combustion engine.
Background
With the wide application and scientific development of internal combustion engines, in order to make the internal combustion engine output larger torque, a turbocharging mode is generally adopted to improve the output torque of the internal combustion engine. However, as the rotation speed of the internal combustion engine increases, the gas flow and the expansion ratio of the turbine also increase, so that the work of the turbine increases, and the rotation speed and the supercharging pressure of the supercharger also increase. In order to prevent the supercharger from running over speed and control the supercharging pressure, a part of exhaust gas needs to be discharged under the effect of the supercharging pressure, and the internal combustion engine can work normally only by controlling the air pressure in the internal combustion engine within a certain range. The existing mode is that an electronic control air release valve is used as the input of an electric pressure regulating valve in an internal combustion engine through a stable air source, the pressure output is controlled by controlling different opening degrees of the electric pressure regulating valve, a push rod in the electronic control air release valve is moved under different pressures based on the air release characteristics of the electronic control air release valve, and the exhaust gas bypass valve of a supercharger is controlled to be closed and opened through the movement of the push rod.
However, as the working time of the air release valve increases, the performance of the spring used for moving the push rod on the push rod in the electronic control air release valve is reduced, so that the air release characteristic of the electronic control air release valve is affected, the electronic control air release valve cannot accurately control the closing and opening of the supercharger waste gas bypass valve through the push rod under the same pressure, and the service performance of the internal combustion engine is reduced.
Disclosure of Invention
In view of the above, embodiments of the present invention provide a self-learning method for an air release characteristic of an electronically controlled air release valve, an electronic control unit, and an internal combustion engine, in which a relationship of a displacement air release characteristic of a push rod corresponding to different pressure values of the air release valve obtained in a preset period is updated to an electronic control device, so that when air is released through an air release characteristic curve, an accurate control of a waste gas bypass valve of a supercharger in the internal combustion engine is realized by adjusting a pressure regulating valve.
In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions:
the first aspect discloses a self-learning method for air release characteristics of an electronic control air release valve, which is suitable for an internal combustion engine, wherein the internal combustion engine comprises an Electronic Control Unit (ECU), an electric pressure regulating valve, a pressure sensor and the electronic control air release valve, the electronic control air release valve comprises a push rod and a spring arranged on the push rod, scale marks are marked on the push rod, and the method comprises the following steps:
in a shutdown state, acquiring pressure values P output by an electrical pressure regulating valve based on different PWM controls in a preset period and push rod displacement S in an electronic control air release valve, wherein one PWM corresponds to one pressure value P and one pressure value corresponds to one push rod displacement S;
determining a coordinate set of a relation curve of the pressure value P and the push rod displacement S under different PWM by using the pressure value P and the push rod displacement S corresponding to the pressure value P;
and updating a coordinate set of a stored deflation characteristic curve based on the coordinate set of the relation curve of the pressure value P and the push rod displacement S, generating a new coordinate set of the deflation characteristic curve, and storing the new coordinate set of the deflation characteristic curve, wherein the deflation characteristic curve is used for indicating the deflation characteristic of the electronic control deflation valve.
Preferably, in the obtaining of the pressure value P output by the electrical pressure regulating valve based on different PWM controls in the preset period and the push rod displacement S in the electronic control purge valve, the method includes:
in a preset period, acquiring a push rod reading a of a spring in a natural state without pressure;
acquiring pressure values P and push rod scale readings output by the electric pressure regulating valve under the control of different PWM values;
and determining the push rod displacement S corresponding to different pressure values P based on the reading a.
Preferably, the determining, by using the pressure value P and the push rod displacement S corresponding to the pressure value P, a coordinate set of a relationship curve between the pressure value P and the push rod displacement S under different PWMs includes:
acquiring pressure values under different PWM and push rod displacement S corresponding to the pressure value P;
establishing a coordinate system according to the pressure value P and the push rod displacement S corresponding to the pressure value P, and determining a coordinate set forming a relation curve of the pressure value P and the push rod displacement S, wherein the pressure value P is an X axis, and the push rod displacement S is a Y axis.
Preferably, the updating the stored coordinate set of the deflation characteristic curve based on the coordinate set of the relationship curve of the pressure value P and the push rod displacement S, generating a new coordinate set of the deflation characteristic curve, and storing the new coordinate set of the deflation characteristic curve, includes:
acquiring a push rod displacement S corresponding to each pressure value P in a coordinate set in a relation curve of the pressure values P and the push rod displacement S;
and replacing the push rod displacement S corresponding to each pressure value P in the stored coordinate set of the deflation characteristic curve by using the push rod displacement S, generating and storing a new coordinate set of the deflation characteristic curve.
The second aspect discloses an electronic control unit ECU, is applicable to the internal-combustion engine, the internal-combustion engine includes ECU, electric pressure regulating valve, pressure sensor and automatically controlled bleed valve, automatically controlled bleed valve include the push rod with set up in spring on the push rod, mark the scale mark on the push rod, ECU includes:
the receiver is used for receiving pressure values P output by the electric pressure regulating valve based on different PWM controls in a preset period and push rod displacement S in the electric control air release valve in a shutdown state, wherein one PWM corresponds to one pressure value P, and one pressure value corresponds to one push rod displacement S;
and the processor is used for outputting PWM to the electric pressure regulating valve, determining a coordinate set of a relation curve of the pressure value P and the push rod displacement S by using the pressure value P and the push rod displacement S corresponding to the pressure value P under different PWM, updating the stored coordinate set of the deflation characteristic curve based on the coordinate set of the relation curve of the pressure value P and the push rod displacement S, generating a new coordinate set of the deflation characteristic curve, and storing the new coordinate set of the deflation characteristic curve, wherein the deflation characteristic curve is used for indicating the deflation characteristic of the electric control deflation valve.
Preferably, the receiver is specifically configured to, in a preset period, obtain a reading a of the push rod of the spring in a natural state without pressure, obtain pressure values P and push rod scale readings output by the electrical pressure regulating valve under control of different PWM values, and determine, based on the reading a, push rod displacements S corresponding to the different pressure values P.
Preferably, the processor, which determines the coordinate set of the relation curve between the pressure value P and the push rod displacement S under different PWMs by using the pressure value P and the push rod displacement S corresponding to the pressure value P, is specifically configured to acquire the pressure values under different PWMs, the push rod displacement S corresponding to the pressure value P, establish a coordinate system according to the pressure value P and the push rod displacement S corresponding to the pressure value P, and determine the coordinate set of the relation curve between the pressure value P and the push rod displacement S, where the pressure value P is an X axis and the push rod displacement S is a Y axis.
Preferably, the stored coordinate set of the deflation characteristic curve is updated based on the coordinate set of the relationship curve between the pressure value P and the push rod displacement S, so as to generate a new coordinate set of the deflation characteristic curve, and the stored processor is specifically configured to acquire the push rod displacement S corresponding to each pressure value P in the coordinate set of the relationship curve between the pressure value P and the push rod displacement S, and replace the push rod displacement S corresponding to each pressure value P in the stored coordinate set of the deflation characteristic curve with the push rod displacement S, so as to generate and store a new coordinate set of the deflation characteristic curve.
A third aspect discloses an internal combustion engine comprising the apparatus of any one of the electronic control units ECU disclosed in the second aspect.
According to the self-learning method for the air release characteristic of the electronic control air release valve, the electronic control unit ECU and the internal combustion engine, the pressure value P output by the electrical pressure regulating valve under different PWM controls in the preset period and the push rod displacement S in the electronic control air release valve are obtained in the shutdown state; determining a coordinate set of a relation curve of the pressure value P and the push rod displacement S under different PWM by using the pressure value P and the push rod displacement S corresponding to the pressure value P; and updating the stored coordinate set of the deflation characteristic curve based on the coordinate set of the relation curve of the pressure value P and the push rod displacement S, generating a new coordinate set of the deflation characteristic curve, and storing the new coordinate set. According to the self-learning method for the air release characteristic of the electronic control air release valve disclosed by the embodiment, the air release characteristic relation between the air release valve pressure value and the push rod displacement is obtained in the preset period, the obtained air release characteristic relation is updated to the electronic control equipment, and the self-learning method for the air release characteristic of the electronic control air release valve is realized, so that the problem that when air release is carried out through an air release characteristic curve, the spring coefficient cannot be accurately controlled due to the fact that the spring coefficient is changed due to overlong use time of a spring in the electronic control air release valve is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a flow chart of a self-learning method for the air release characteristic of an electronically controlled air release valve according to an embodiment of the present invention;
FIG. 2 is a flow chart of another method for self-learning the air release characteristic of the electronically controlled air release valve according to the embodiment of the invention;
FIG. 3 is a flow chart of another method for self-learning the air release characteristic of the electronically controlled air release valve according to the embodiment of the invention;
FIG. 4 is a flow chart of another method for self-learning the air release characteristic of the electronically controlled air release valve according to the embodiment of the invention;
fig. 5 is a schematic structural diagram of an electronic control unit ECU according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In this application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The embodiment of the invention provides a self-learning method and a device for the air discharge characteristic of an electronic control air discharge valve, and referring to fig. 1, the method at least comprises the following steps:
step S101: and under the shutdown state, acquiring a pressure value P output by the electric pressure regulating valve based on different PWM controls in a preset period and the displacement S of a push rod in the electric control air release valve.
In step S101, one of the PWMs corresponds to one of the pressure values P, and one of the pressure values corresponds to one of the push rod displacements S.
The internal combustion engine comprises an Electronic Control Unit (ECU), an electric pressure regulating valve, a pressure sensor and an electronic control air release valve, wherein the electronic control air release valve comprises a push rod and a spring arranged on the push rod, and scale marks are marked on the push rod. The during operation of automatically controlled bleed valve, use the air supply of stabilizing atmospheric pressure, electronic control equipment carries out the pressure regulating through the electric air-vent valve of PWM control, specifically be the valve aperture through controlling electric air-vent valve, thereby the atmospheric pressure of control current output, and the atmospheric pressure value P of output then acquires through pressure sensor, when pressure value P in the bleed valve changes, can make the spring produce deformation in the automatically controlled bleed valve, spring deformation can drive the push rod of connection on the valve simultaneously and remove, the valve of the booster waste gas bypass valve that sets up in the internal-combustion engine is opened through lever principle to the push rod, thereby reach the exhaust gas discharge in the interior gas.
Because the scale marks are marked on the push rod, when the push rod moves, the current push rod scale mark reading and the push rod scale reading under the last pressure are read, and then the displacement S of the push rod can be calculated through calculation, namely the push rod generates the displacement S.
Step S102: and determining a coordinate set of a relation curve of the pressure value P and the push rod displacement S under different PWM by using the pressure value P and the push rod displacement S corresponding to the pressure value P.
It should be noted that, because the change of the pressure value P may cause the push rod to generate a displacement S, the pressure value P and the push rod displacement S are in a one-to-one correspondence relationship, and the push rod displacement S corresponding to different pressure values P and different pressure values P is recorded to obtain a plurality of pressure values P and a plurality of push rod displacements S corresponding to the pressure values P, where preferably, the pressure value P is an abscissa and the push rod displacement S is an ordinate, but is not limited thereto. And substituting the obtained pressure values P and the push rod displacements S corresponding to the pressure values P into a coordinate system to obtain a relation curve of the pressure values P and the push rod displacements S, wherein the push rod displacements S corresponding to the pressure values P are a coordinate set of the relation curve of the pressure values P and the push rod displacements S.
Step S103: and updating a coordinate set of a stored deflation characteristic curve based on the coordinate set of the relation curve of the pressure value P and the push rod displacement S, generating a new coordinate set of the deflation characteristic curve, and storing the new coordinate set of the deflation characteristic curve, wherein the deflation characteristic curve is used for indicating the deflation characteristic of the electronic control deflation valve.
In the embodiment of the present invention, the displacement generated by the push rod in the electronically controlled purge valve corresponds to the valve opening degree of the wastegate valve of the supercharger in the internal combustion engine, but the electronic control unit ECU originally stores the purge characteristic curve, but since the spring coefficient of the spring in the electronically controlled purge valve changes after the spring is used for a long time, the valve opening degree of the wastegate valve of the supercharger in the turbine cannot reach the preset opening degree by adjusting the pressure in the pressure regulating valve using the stored purge characteristic curve, and the redundant gas in the internal combustion engine cannot be discharged.
Based on the above description, the coordinate set of the push rod displacement S corresponding to different pressure values P in the current period is updated to the coordinate set of the push rod displacement S corresponding to the stored pressure values P, that is, a new coordinate set of the air release characteristic curve is generated and stored, in the current period, the electronic control unit ECU may control the electronic pressure regulating valve to regulate the pressure in the air release valve through the updated air release characteristic curve, and then drive the push rod through the spring to drive the valve of the supercharger waste gas bypass valve in the internal combustion engine to open and close, thereby achieving the exhaust of the waste gas in the internal combustion engine.
In the embodiment of the application, the pressure value P output by the electric pressure regulating valve based on different PWM controls in a preset period and the push rod displacement S in the electric control air release valve are obtained in the shutdown state; determining a coordinate set of a relation curve of the pressure value P and the push rod displacement S under different PWM by using the pressure value P and the push rod displacement S corresponding to the pressure value P; and updating the stored coordinate set of the deflation characteristic curve based on the coordinate set of the relation curve of the pressure value P and the push rod displacement S, generating a new coordinate set of the deflation characteristic curve, and storing the new coordinate set. According to the self-learning method for the air release characteristic of the electronic control air release valve disclosed by the embodiment, the air release characteristic relation between the pressure value of the air release valve and the displacement of the push rod is obtained in the preset period, and the obtained air release characteristic relation is updated into the electronic control equipment, so that the self-learning method for the air release characteristic of the electronic control air release valve is realized, and the problem that when air release is carried out through an air release characteristic curve, the change of the spring coefficient caused by overlong use time of a spring in the air release valve cannot accurately control a waste gas bypass valve of a.
Based on the self-learning method for the air release characteristic of the electronic control air release valve disclosed by the embodiment of the invention, the specific implementation process of the step S101 shown in FIG. 1 comprises the following steps as shown in FIG. 2:
step S201: and acquiring the push rod reading a of the spring in a natural state without pressure in a preset period.
It should be noted that, the push rod displacement S is generated by driving the push rod to move when the spring deforms, and the push rod reading a of the spring in the natural state without pressure is a state when the spring does not deform, and the exhaust gas bypass valve of the supercharger of the internal combustion engine is in a closed state when the spring is in the current state, that is, the current push rod reading a.
Step S202: and acquiring pressure values P and push rod scale readings output by the electric pressure regulating valve under the control of different PWM values.
It should be noted that the electric pressure regulating valve can regulate the valve to any opening degree through the control of the PWM value, and control the pressure value P in the electronic control air release valve through different opening degrees of the valve, where the pressure value P is obtained through the pressure sensor, and records the push rod scale reading corresponding to the current pressure value P.
Step S203: and determining the push rod displacement S corresponding to different pressure values P based on the reading a.
It should be noted that, since the reading a is a reading of the scale of the push rod of the spring in a natural non-pressure state, the push rod displacement S corresponding to the current pressure value P can be obtained by calculating the difference between the currently obtained reading of the scale of the push rod and the reading a.
According to the embodiment of the invention, the reading a of the push rod of the spring in a natural state without pressure is obtained in a preset period; acquiring pressure values P and push rod scale readings output by the electric pressure regulating valve under the control of different PWM values; and determining the push rod displacement S corresponding to different pressure values P based on the reading a. According to the self-learning method for the air release characteristic of the electronic control air release valve disclosed by the embodiment, the scale readings of the push rod under different pressures are obtained, the displacement S of the push rod under different pressures is calculated, and therefore the displacement S of the push rod corresponding to different pressures P is obtained in the preset period.
Based on the self-learning method for the air release characteristic of the electronic control air release valve disclosed by the embodiment of the invention, the specific implementation process of the step S102 shown in fig. 1, as shown in fig. 3, includes the following steps:
step S301: and acquiring the pressure values under different PWM and the push rod displacement S corresponding to the pressure value P.
It should be noted that the relationship curve between the pressure value P and the push rod displacement S is formed by different push rod displacements S corresponding to different pressures P, so that different pressure values P and push rod displacements S corresponding to different pressure values P need to be obtained under different PWMs.
Step S302: establishing a coordinate system according to the pressure value P and the push rod displacement S corresponding to the pressure value P, and determining a coordinate set forming a relation curve of the pressure value P and the push rod displacement S.
In the embodiment of the present invention, it is preferable that the pressure value P is an X axis and the ram displacement S is a Y axis, but the present invention is not limited thereto.
And substituting the obtained push rod displacement S corresponding to different pressure values P into a coordinate system to obtain a position coordinate relation curve of the pressure values P and the push rod displacement S, wherein the push rod displacement S corresponding to different pressure values P is a coordinate set forming the relation curve.
According to the embodiment of the application, the pressure values under different PWM are obtained, and the push rod displacement S corresponding to the pressure value P is obtained; establishing a coordinate system according to the pressure value P and the push rod displacement S corresponding to the pressure value P, and determining a coordinate set forming a relation curve of the pressure value P and the push rod displacement S. According to the self-learning method for the air release characteristic of the electronic control air release valve disclosed by the embodiment, the relationship of the push rod displacement S corresponding to different pressure values P is obtained, the push rod displacement S corresponding to different pressure values P is substituted into the coordinate system to form the relationship curve, the push rod displacement S corresponding to the pressure values P of the formed relationship curve forms the coordinate set of the relationship curve, and therefore the coordinate set of the pressure values P and the push rod displacement S is obtained.
Based on the self-learning method for the air release characteristic of the electronic control air release valve disclosed by the embodiment of the invention, the specific implementation process of the step S103 shown in FIG. 1 comprises the following steps as shown in FIG. 4:
step S401: and acquiring the push rod displacement S corresponding to each pressure value P in a coordinate set in a relation curve of the pressure values P and the push rod displacement S.
It should be noted that, the push rod under different pressures of the air release valve can obtain a push rod scale reading, and through the push rod scale reading under the current pressure and the push rod scale reading under the previous pressure, the push rod displacement S generated by the current pressure value and the previous pressure value can be obtained, preferably, the push rod displacement S corresponding to each pressure value P is the push rod displacement S in a natural state without pressure relative to the spring.
Step S402: and replacing the push rod displacement S corresponding to each pressure value P in the stored coordinate set of the deflation characteristic curve by using the push rod displacement S, generating and storing a new coordinate set of the deflation characteristic curve.
It should be noted that the corresponding relationship between the pressure value P and the push rod displacement S is stored in the originally stored deflation characteristic curve, and preferably, under the condition that the pressure value is not changed, the push rod displacement S corresponding to the stored pressure value P is replaced by the push rod displacement S corresponding to the obtained pressure value P, and then the stored pressure value P is continuously stored, so that the updating of the deflation characteristic curve is completed.
In the embodiment of the application, in a coordinate set in a relation curve of the pressure values P and the push rod displacement S, the push rod displacement S corresponding to each pressure value P is obtained; and replacing the push rod displacement S corresponding to each pressure value P in the stored coordinate set of the deflation characteristic curve by using the push rod displacement S, generating and storing a new coordinate set of the deflation characteristic curve. Through the self-learning method for the air release characteristic of the electronic control air release valve disclosed by the embodiment, the push rod displacement S corresponding to each pressure value P is obtained, the push rod displacement S corresponding to the pressure value P in the stored air release characteristic curve is updated, and the updating of the relation curve of the pressure value P and the push rod displacement S corresponding to the pressure value P is realized in the preset period.
Based on the self-learning method for the air release characteristic of the electronic control air release valve disclosed by the embodiment of the invention, the embodiment of the invention also correspondingly discloses an electronic control unit ECU, and as shown in FIG. 5, the ECU mainly comprises:
the receiver 501 is configured to receive pressure values P output by the electrical pressure regulating valve based on different PWM controls and push rod displacement S in the electronically controlled purge valve in a preset period in a shutdown state, where one of the PWM corresponds to one of the pressure values P and one of the pressure values corresponds to one of the push rod displacement S.
The processor 502 is configured to output PWM to the electrical pressure regulating valve, determine, by using the pressure value P and the push rod displacement S corresponding to the pressure value P, a coordinate set of a relationship curve between the pressure value P and the push rod displacement S under different PWMs, update a stored coordinate set of a deflation characteristic curve based on the coordinate set of the relationship curve between the pressure value P and the push rod displacement S, generate a new coordinate set of a deflation characteristic curve, and store the new coordinate set of the deflation characteristic curve, where the deflation characteristic curve is used to indicate a deflation characteristic of the electronic control deflation valve.
Preferably, the receiver 501 is specifically configured to, in a preset period, obtain a reading a of a push rod of the spring in a natural state without pressure, obtain pressure values P and readings of push rod scales output by the electrical pressure regulating valve under control of different PWM values, and determine a push rod displacement S corresponding to the different pressure values P based on the reading a.
Preferably, the processor 502, which determines a coordinate set of a relation curve between the pressure value P and the push rod displacement S under different PWMs by using the pressure value P and the push rod displacement S corresponding to the pressure value P, is specifically configured to acquire the pressure values under different PWMs, the push rod displacement S corresponding to the pressure value P, establish a coordinate system according to the pressure value P and the push rod displacement S corresponding to the pressure value P, and determine the coordinate set of the relation curve between the pressure value P and the push rod displacement S, where the pressure value P is an X axis and the push rod displacement S is a Y axis.
Preferably, the stored coordinate set of the deflation characteristic curve is updated based on the coordinate set of the relationship curve between the pressure value P and the push rod displacement S, so as to generate a new coordinate set of the deflation characteristic curve, and the stored processor 502 is specifically configured to obtain the push rod displacement S corresponding to each pressure value P in the coordinate set of the relationship curve between the pressure value P and the push rod displacement S, and replace the push rod displacement S corresponding to each pressure value P in the stored coordinate set of the deflation characteristic curve with the push rod displacement S, so as to generate and store a new coordinate set of the deflation characteristic curve.
The specific execution principle and execution process of each module and unit of the electronic control unit ECU disclosed in the above embodiment of the present invention are the same as the method for self-learning the air release characteristic of the electronic control air release valve disclosed in the above embodiment of the present invention, and reference may be made to the corresponding parts in the method for self-learning the air release characteristic of the electronic control air release valve disclosed in the above embodiment of the present invention, and details are not repeated here.
In the embodiment of the application, a receiver receives pressure values P output by an electrical pressure regulating valve based on different PWM controls in a preset period and push rod displacement S in an electronic control air release valve in a shutdown state, wherein one PWM corresponds to one pressure value P, and one pressure value corresponds to one push rod displacement S; the processor outputs PWM to the electric pressure regulating valve, a coordinate set of a relation curve of the pressure value P and the push rod displacement S is determined by using the pressure value P and the push rod displacement S corresponding to the pressure value P under different PWM, the stored coordinate set of the deflation characteristic curve is updated based on the coordinate set of the relation curve of the pressure value P and the push rod displacement S, a new coordinate set of the deflation characteristic curve is generated and stored, and the deflation characteristic curve is used for indicating the deflation characteristic of the electric control deflation valve. Through the electronic control unit ECU disclosed by the embodiment, the deflation characteristic relation between the pressure value of the deflation valve and the displacement of the push rod is obtained in the preset period, and the obtained deflation characteristic relation is updated to the electronic control equipment, so that the self-learning method of the deflation characteristic of the electronic control deflation valve is realized, and the problem that when the deflation is carried out through the deflation characteristic curve, the change of the spring coefficient caused by overlong use time of the spring in the deflation valve cannot accurately control the waste gas bypass valve of the supercharger in the internal combustion engine is solved.
Corresponding to the self-learning method for the air release characteristic of the electronic control air release valve and the electronic control unit ECU, the embodiment of the application also discloses an internal combustion engine, the internal combustion engine comprises any one device of the electronic control unit ECU, the principle of the internal combustion engine is the same, and the details are not repeated.
In the embodiment of the application, a receiver receives pressure values P output by an electrical pressure regulating valve based on different PWM controls in a preset period and push rod displacement S in an electronic control air release valve in a shutdown state, wherein one PWM corresponds to one pressure value P, and one pressure value corresponds to one push rod displacement S; the processor outputs PWM to the electric pressure regulating valve, a coordinate set of a relation curve of the pressure value P and the push rod displacement S is determined by using the pressure value P and the push rod displacement S corresponding to the pressure value P under different PWM, the stored coordinate set of the deflation characteristic curve is updated based on the coordinate set of the relation curve of the pressure value P and the push rod displacement S, a new coordinate set of the deflation characteristic curve is generated and stored, and the deflation characteristic curve is used for indicating the deflation characteristic of the electric control deflation valve. Through the electronic control unit ECU disclosed by the embodiment, the deflation characteristic relation between the pressure value of the deflation valve and the displacement of the push rod is obtained in the preset period, and the obtained deflation characteristic relation is updated to the electronic control equipment, so that the self-learning method of the deflation characteristic of the electronic control deflation valve is realized, and the problem that when the deflation is carried out through the deflation characteristic curve, the change of the spring coefficient caused by overlong use time of the spring in the deflation valve cannot accurately control the waste gas bypass valve of the supercharger in the internal combustion engine is solved.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, the system or system embodiments are substantially similar to the method embodiments and therefore are described in a relatively simple manner, and reference may be made to some of the descriptions of the method embodiments for related points. The above-described system and system embodiments are only illustrative, wherein the units described as separate parts may or may not be physically separate, and the 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 modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. 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.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. The self-learning method for the air release characteristic of the electronic control air release valve is characterized by being applicable to an internal combustion engine, wherein the internal combustion engine comprises an electronic control unit, an electronic pressure regulating valve, a pressure sensor and the electronic control air release valve, the electronic control air release valve comprises a push rod and a spring arranged on the push rod, scale marks are marked on the push rod, and the self-learning method comprises the following steps of:
in a shutdown state, acquiring pressure values P output by an electrical pressure regulating valve based on different PWM controls in a preset period and push rod displacement S in an electronic control air release valve, wherein one PWM corresponds to one pressure value P and one pressure value corresponds to one push rod displacement S;
determining a coordinate set of a relation curve of the pressure value P and the push rod displacement S under different PWM by using the pressure value P and the push rod displacement S corresponding to the pressure value P;
and updating a coordinate set of a stored deflation characteristic curve based on the coordinate set of the relation curve of the pressure value P and the push rod displacement S, generating a new coordinate set of the deflation characteristic curve, and storing the new coordinate set of the deflation characteristic curve, wherein the deflation characteristic curve is used for indicating the deflation characteristic of the electronic control deflation valve.
2. The method according to claim 1, wherein the obtaining of the pressure value P output by the electrical pressure regulating valve under different PWM control and the push rod displacement S in the electronically controlled purge valve within the preset period comprises:
in a preset period, acquiring a push rod reading a of a spring in a natural state without pressure;
acquiring pressure values P and push rod scale readings output by the electric pressure regulating valve under the control of different PWM values;
and determining the push rod displacement S corresponding to different pressure values P based on the reading a.
3. The method according to claim 1, wherein the determining, by using the pressure value P and the push rod displacement S corresponding to the pressure value P, a coordinate set of a relationship curve of the pressure value P and the push rod displacement S under different PWMs comprises:
acquiring pressure values under different PWM and push rod displacement S corresponding to the pressure value P;
establishing a coordinate system according to the pressure value P and the push rod displacement S corresponding to the pressure value P, and determining a coordinate set forming a relation curve of the pressure value P and the push rod displacement S, wherein the pressure value P is an X axis, and the push rod displacement S is a Y axis.
4. The method according to claim 1, wherein said updating a set of coordinates of a stored deflation characteristic curve based on a set of coordinates of a relationship curve of said pressure value P and said pusher displacement S, generating a set of coordinates of a new deflation characteristic curve, and storing, comprises:
acquiring a push rod displacement S corresponding to each pressure value P in a coordinate set in a relation curve of the pressure values P and the push rod displacement S;
and replacing the push rod displacement S corresponding to each pressure value P in the stored coordinate set of the deflation characteristic curve by using the push rod displacement S, generating and storing a new coordinate set of the deflation characteristic curve.
5. The utility model provides an electronic control unit, its characterized in that is applicable to the internal-combustion engine, the internal-combustion engine includes electronic control unit, electric pressure-regulating valve, pressure sensor and automatically controlled bleed valve, automatically controlled bleed valve include the push rod with set up in spring on the push rod, it has the scale mark to mark on the push rod, electronic control unit includes:
the receiver is used for receiving pressure values P output by the electric pressure regulating valve based on different PWM controls in a preset period and push rod displacement S in the electric control air release valve in a shutdown state, wherein one PWM corresponds to one pressure value P, and one pressure value corresponds to one push rod displacement S;
and the processor is used for outputting PWM to the electric pressure regulating valve, determining a coordinate set of a relation curve of the pressure value P and the push rod displacement S by using the pressure value P and the push rod displacement S corresponding to the pressure value P under different PWM, updating the stored coordinate set of the deflation characteristic curve based on the coordinate set of the relation curve of the pressure value P and the push rod displacement S, generating a new coordinate set of the deflation characteristic curve, and storing the new coordinate set of the deflation characteristic curve, wherein the deflation characteristic curve is used for indicating the deflation characteristic of the electric control deflation valve.
6. The electronic control unit according to claim 5, wherein the receiver is configured to obtain, in a preset period, a reading a of the push rod of the spring in a natural state without pressure, obtain pressure values P and push rod scale readings output by the electrical pressure regulating valve under control of different PWM values, and determine push rod displacements S corresponding to the different pressure values P based on the reading a.
7. The electronic control unit according to claim 5, wherein the processor, which determines the coordinate set of the relationship curve between the pressure value P and the plunger displacement S at different PWMs by using the pressure value P and the plunger displacement S corresponding to the pressure value P, is specifically configured to obtain the pressure values at different PWMs and the plunger displacement S corresponding to the pressure value P, establish a coordinate system according to the pressure value P and the plunger displacement S corresponding to the pressure value P, and determine the coordinate set of the relationship curve between the pressure value P and the plunger displacement S, where the pressure value P is an X-axis and the plunger displacement S is a Y-axis.
8. The electronic control unit according to claim 5, wherein the processor is configured to update a stored coordinate set of the deflation characteristic curve based on the coordinate set of the relationship curve between the pressure value P and the push rod displacement S, generate a new coordinate set of the deflation characteristic curve, and store the new coordinate set of the deflation characteristic curve, specifically, to obtain the push rod displacement S corresponding to each pressure value P in the coordinate set of the relationship curve between the pressure value P and the push rod displacement S, and replace the push rod displacement S corresponding to each pressure value P in the stored coordinate set of the deflation characteristic curve with the push rod displacement S, generate and store the new coordinate set of the deflation characteristic curve.
9. An internal combustion engine characterized by comprising the electronic control unit according to any one of claims 5 to 8.
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| CN114263536B (en) * | 2022-03-03 | 2022-07-19 | 潍柴动力股份有限公司 | Method and device for determining air release amount in air release valve |
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