CN117432533B - Exhaust throttle valve control method, device, equipment and automobile - Google Patents
Exhaust throttle valve control method, device, equipment and automobile Download PDFInfo
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- CN117432533B CN117432533B CN202311739595.8A CN202311739595A CN117432533B CN 117432533 B CN117432533 B CN 117432533B CN 202311739595 A CN202311739595 A CN 202311739595A CN 117432533 B CN117432533 B CN 117432533B
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- 238000000034 method Methods 0.000 title claims abstract description 57
- 239000000779 smoke Substances 0.000 claims abstract description 41
- 238000001914 filtration Methods 0.000 claims description 26
- 230000008859 change Effects 0.000 claims description 19
- 238000004364 calculation method Methods 0.000 claims description 18
- 230000009471 action Effects 0.000 claims description 16
- 238000013507 mapping Methods 0.000 claims description 14
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- 230000007613 environmental effect Effects 0.000 claims description 6
- 239000000446 fuel Substances 0.000 claims description 6
- 230000008569 process Effects 0.000 abstract description 12
- 230000001052 transient effect Effects 0.000 abstract description 8
- 230000002159 abnormal effect Effects 0.000 abstract description 6
- 238000004891 communication Methods 0.000 description 12
- 239000000243 solution Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000012937 correction Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/04—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning exhaust conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/38—Control for minimising smoke emissions, e.g. by applying smoke limitations on the fuel injection amount
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Abstract
The invention provides a control method, a device, equipment and an automobile for an exhaust throttle valve. The problem of in the closed-loop control process, under the transient state operating mode, because the pressure size changes before the vortex of setting value have the abnormal control of exhaust throttle valve that the inflection point leads to, and the engine smoke degree that arouses is too big is solved.
Description
Technical Field
The invention relates to the technical field of engine control, in particular to an exhaust throttle valve control method, an exhaust throttle valve control device, exhaust throttle valve control equipment and an automobile.
Background
With the increasing severity of engine emissions, many engines are equipped with exhaust throttle valves for engine thermal management, and by reducing the opening of the exhaust throttle valve under certain conditions, increasing the exhaust pressure, reducing the intake air flow is used to increase the engine exhaust temperature, so that the aftertreatment can better control pollutants. Exhaust throttle valves of a typical engine are controlled by a pre-vortex pressure sensor or intake pressure. When the intake pressure is controlled simultaneously with the intake throttle valve, the intake pressure is controlled simultaneously by the two actuators, which is likely to cause the two actuators to interfere with each other and thus be difficult to stabilize. The use of the pre-vortex pressure causes high pre-vortex pressure due to control of low load caused by reduction of the opening of the exhaust throttle valve, and the pre-vortex pressure is also high when the pre-vortex pressure is not controlled in a high load area, so that error in control direction of the exhaust throttle valve caused by non-monotonous change of a target value is caused when different areas are in transition, for example, when the opening of the exhaust throttle valve is not required to be closed to be smaller in a medium-high load, the exhaust throttle valve is closed to be opened to be smaller, and the problem of abnormal large smoke degree of an engine is caused.
Disclosure of Invention
In view of the above, the embodiments of the present invention provide a method, an apparatus, a device, and an automobile for controlling an exhaust throttle valve, so as to solve the problem of excessive engine smoke during the control process of the exhaust throttle valve.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:
an exhaust throttle valve control method comprising:
acquiring operation data and actual pre-vortex pressure of an engine;
acquiring the pre-vortex pressure of the non-exhaust throttle valve in the action state matched with the operation data, and recording the pre-vortex pressure as the pre-vortex pressure;
calculating the ratio of the actual pre-vortex pressure to the pre-vortex pressure before adjustment as an actual pre-vortex pressure lifting degree;
acquiring a required pre-vortex pressure lifting degree matched with the operation data;
performing closed-loop calculation based on the actual pre-vortex pressure lifting degree and the required pre-vortex pressure lifting degree to obtain a target opening degree of the exhaust throttle valve;
and controlling the opening of the exhaust throttle valve based on the target opening.
Optionally, in the exhaust throttle valve control method, after acquiring the pre-vortex pressure in the non-exhaust throttle valve operation state matched with the operation data, before calculating the ratio of the actual pre-vortex pressure to the pre-vortex pressure before adjusting, the method further includes:
acquiring a value of a target factor, wherein the target factor is an environmental factor which is marked in advance and affects the pre-vortex pressure adjustment and the required pre-vortex pressure lifting degree;
correcting the pre-vortex pressure in the non-exhaust throttle valve action state based on the value of the target factor;
after obtaining the required pre-vortex pressure lifting degree matched with the operation data, and before performing closed-loop calculation based on the actual pre-vortex pressure lifting degree and the required pre-vortex pressure lifting degree to obtain the target opening of the exhaust throttle valve, the method further comprises the following steps:
and correcting the required pre-vortex pressure lifting degree based on the value of the target factor.
Optionally, in the exhaust throttle valve control method, acquiring the pre-vortex pressure in the non-exhaust throttle valve operation state matched with the operation data, after recording the pre-vortex pressure, and before calculating the ratio of the actual pre-vortex pressure to the pre-vortex pressure, the method further includes:
and filtering the pre-vortex pressure before adjustment.
Optionally, in the exhaust throttle valve control method, filtering the pre-adjustment pre-vortex pressure includes:
calculating the real-time change rate of the pre-vortex pressure before adjustment;
acquiring real-time filtering time matched with the real-time change rate based on a mapping relation between the preset change rate and the filtering time;
and filtering the pre-adjustment pre-vortex pressure based on the real-time filtering time.
Optionally, in the exhaust throttle valve control method, the operation data at least includes: engine speed and engine fuel injection quantity.
Optionally, in the exhaust throttle valve control method, after controlling the opening of the exhaust throttle valve based on the target opening, the method further includes:
judging whether the exhaust smoke intensity of the engine is larger than a preset smoke intensity;
and when the engine exhaust smoke intensity is larger than the preset smoke intensity, increasing the opening of the exhaust throttle valve based on the difference value between the engine exhaust smoke intensity and the preset smoke intensity.
Optionally, in the exhaust throttle valve control method, after increasing the opening of the exhaust throttle valve, the method further includes:
and suppressing the opening degree adjustment of the exhaust throttle valve within a preset period after the opening degree of the exhaust throttle valve is increased.
An exhaust throttle valve control apparatus comprising:
the data acquisition unit is used for acquiring the operation data and the actual pre-vortex pressure of the engine;
the pre-vortex pressure acquisition unit is used for acquiring pre-vortex pressure in the action state of the non-exhaust throttle valve matched with the operation data and recording the pre-vortex pressure as pre-vortex pressure adjustment;
an actual lifting degree calculation unit, configured to calculate a ratio of the actual pre-vortex pressure to the pre-vortex pressure before adjustment as an actual pre-vortex pressure lifting degree;
the demand lifting degree calculation unit is used for acquiring the demand pre-vortex pressure lifting degree matched with the operation data;
the opening adjusting unit is used for performing closed-loop calculation based on the actual pre-vortex pressure lifting degree and the required pre-vortex pressure lifting degree to obtain a target opening of the exhaust throttle valve; and controlling the opening of the exhaust throttle valve based on the target opening.
An exhaust throttle valve control apparatus comprising:
a memory and a processor;
the memory is used for storing programs;
the processor is configured to execute the program to implement the steps of the exhaust throttle valve control method according to any one of the above.
An automobile includes the exhaust throttle valve control apparatus described above.
Based on the above technical solution, the solution provided by the embodiment of the present invention calculates the actual pre-vortex pressure lifting degree based on the actual pre-vortex pressure and the adjusted pre-vortex pressure, performs a closed loop operation based on the actual pre-vortex pressure lifting degree and the required pre-vortex pressure lifting degree, obtains the target opening degree of the exhaust throttle valve, and controls the opening degree of the exhaust throttle valve to achieve the control stability of the exhaust throttle valve and the transient opening degree. The problem of in the closed-loop control process, under the transient state operating mode, because the pressure size changes before the vortex of setting value have the abnormal control of exhaust throttle valve that the inflection point leads to, and the engine smoke degree that leads to is too big 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 that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the trend of variation of pre-vortex pressure P3 corresponding to different engine operating conditions in the exhaust throttle valve thermal management state;
fig. 2 is a schematic diagram of a trend of variation of pre-vortex pressure P3 corresponding to different engine working conditions in an exhaust throttle valve non-thermal management state;
FIG. 3 is a flow chart of an exhaust throttle control method disclosed in an embodiment of the present application;
FIG. 4 is a schematic diagram of a pre-conditioning pre-vortex pressure correction process;
FIG. 5 is a schematic diagram of a correction process for the required pre-vortex pressure rise;
FIG. 6 is a flow chart of an exhaust throttle control method disclosed in another embodiment of the present application;
FIG. 7 is a schematic diagram of an exhaust throttle valve control apparatus according to an embodiment of the present disclosure;
fig. 8 is a schematic structural view of an exhaust throttle valve control apparatus disclosed in an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
First, some terms used in the present application will be described:
exhaust throttle valve: a valve mounted on the engine for controlling the exhaust pressure is typically mounted at the rear end of the turbocharger.
A pre-vortex pressure sensor: a sensor mounted to measure pressure at an engine exhaust manifold.
Calibrating: data in engine design and development is filled into the ECU and used for data used in the running process of the ECU.
In the prior art, the engine controls the reduction of the air inflow of the engine and the increase of the exhaust temperature by reducing the opening of the exhaust throttle valve and controlling the increase of the pre-vortex pressure. The region of the engine where thermal management is required is typically at medium and low load conditions, such as region (1) of fig. 1, the magnitude in fig. 1 referring to the magnitude of the pre-vortex pressure. In the middle-low load region, the opening degree of the exhaust throttle valve is required to be reduced, the pre-vortex pressure is increased, the air inflow is reduced, and the thermal management is performed. However, in a high load (e.g., the region (3) of fig. 1), the exhaust throttle valve does not need to be controlled, but because of the intake characteristic of the engine, the pre-swirl pressure is also high in this region. If a conventional mode of pre-vortex pressure closed loop or expansion ratio closed loop is used, when the load changes from the region (1) to the region (3), the set value of the pre-vortex pressure is larger because of the mode of PID closed loop control, so that the opening degree of an exhaust throttle valve is reduced by PID control, the pre-vortex pressure is lower, the opening degree of the exhaust throttle valve is smaller because of continuous closed loop, and thus, the engine air intake is seriously insufficient because of cycle iteration and the smoke degree of the engine is abnormally increased, so that the serious problem is caused.
In order to solve the above-mentioned problem, the present application proposes a concept of the pre-vortex pressure rise degree, which refers to a ratio calculated by ratio of the actual pre-vortex pressure P3 to P3bas in the no-heat management state (exhaust throttle valve non-operation state) at that time, that is, the pre-vortex pressure rise degree=the actual pre-vortex pressure P3/the pre-vortex pressure P3bas in the no-exhaust throttle valve operation state. In general, when the exhaust throttle valve is not operated, the pre-vortex pressure rise becomes a monotonous pulse spectrum with the rotational speed oil amount, as shown in fig. 2, the pressure rise is 1 in the region corresponding to the region (3) in fig. 1 in fig. 2, and the pre-vortex pressure gradually increases from the region (1) to the region (2) in the non-thermal management state. According to the method and the device, the degree of elevation of the pressure before the vortex is calculated, and the degree of elevation of the pressure before the vortex is required to carry out closed-loop control on the opening of the exhaust throttle valve, so that the control stability of the exhaust throttle valve and the transient opening degree are realized. The problem of in the closed-loop control process, under the transient state operating mode, because the magnitude of the setting value of pressure changes before the vortex has the inflection point to lead to exhaust throttle abnormal control to lead to the smoke intensity too big is solved.
Referring to fig. 3, an exhaust throttle valve control method disclosed in an embodiment of the present application includes:
step S101: operational data and actual pre-vortex pressure of the engine are acquired.
In this scheme, the operation data of the engine are related data for calculating the pre-vortex pressure without the action of the exhaust throttle valve, and related data for calculating the required pre-vortex pressure of the engine, where the data may include the engine speed and the engine fuel injection quantity, and of course, other related data may be added or deleted according to the design requirement.
The actual pre-vortex pressure can be extracted from an engine controller, and can be directly acquired by a pre-vortex pressure sensor.
Step S102: and acquiring the pre-vortex pressure in the action state of the non-exhaust throttle valve matched with the operation data, and recording the pre-vortex pressure as the pre-vortex pressure.
Before the implementation of the method, based on the pre-vortex pressure in the non-thermal management state in the engine design and development stage, the mapping relation between the pre-vortex pressure in the non-exhaust throttle valve action state and the operation data is calibrated, the mapping relation is stored in a mapping table or map, then the mapping table or map is stored in an ECU, when the step is executed, after the operation data is acquired, the pre-vortex pressure matched with the operation data can be directly searched and obtained based on the mapping table or map, and the pre-vortex pressure is recorded as the pre-vortex pressure before adjustment.
Step S103: and calculating the ratio of the actual pre-vortex pressure to the pre-vortex pressure before adjustment as the actual pre-vortex pressure lifting degree.
In this step, after the actual pre-vortex pressure and the pre-vortex pressure before adjustment are obtained, the ratio of the actual pre-vortex pressure to the pre-vortex pressure before adjustment is recorded as the actual pre-vortex pressure and the pre-vortex pressure before adjustment.
K1 =p3/P3 bas, where P3 is the actual pre-vortex pressure, P3bas is the adjusted pre-vortex pressure, and K1 is the actual pre-vortex pressure rise.
Step S104: and acquiring the required pre-vortex pressure lifting degree matched with the operation data.
Before the scheme is executed, the method is required to be configured in an engine design development stage, and based on the pre-vortex pressure in a thermal management state, the mapping relation between the required pre-vortex pressure lifting degree required in an exhaust throttle valve action state and the operation data is calibrated, and the mapping relation can be calibrated manually. And storing the mapping relation in a mapping table or map, and then storing the mapping table or map in an ECU, wherein when the step is executed, after the operation data is acquired, the required pre-vortex pressure lifting degree matched with the operation data can be directly found based on the mapping table or map.
Step S105: and performing closed-loop calculation based on the actual pre-vortex pressure lifting degree and the required pre-vortex pressure lifting degree to obtain the target opening degree of the exhaust throttle valve.
In this step, the required pre-vortex pressure lifting degree is taken as a target, and a closed-loop operation is performed based on the actual pre-vortex pressure lifting degree and the required pre-vortex pressure lifting degree, so that an exhaust throttle valve opening matched with the actual pre-vortex pressure lifting degree can be obtained and is recorded as a target opening, and the exhaust throttle valve opening is different, and the corresponding actual pre-vortex pressure lifting degree is also different.
Step S106: and controlling the opening of the exhaust throttle valve based on the target opening.
After determining the target opening, controlling the opening of the exhaust throttle valve based on the target opening, and returning to step S101 to form a continuously circulated closed-loop control process.
According to the scheme disclosed by the embodiment of the application, the actual pre-vortex pressure lifting degree is obtained through calculation based on the actual pre-vortex pressure and the pre-vortex pressure before adjustment, closed-loop operation is performed based on the actual pre-vortex pressure lifting degree and the required pre-vortex pressure lifting degree, the target opening degree of the exhaust throttle valve is obtained, and the opening degree of the exhaust throttle valve is controlled, so that the control stability and the transient opening degree of the exhaust throttle valve are realized. The problem of in the closed-loop control process, under the transient state operating mode, because the pressure size changes before the vortex of setting value have the abnormal control of exhaust throttle valve that the inflection point leads to, and the engine smoke degree that arouses is too big is solved.
The applicant found that, the pre-vortex pressure and the required pre-vortex pressure rise in the non-exhaust throttle valve operating state are not only related to the operation data of the engine, but also related to the target factors in the environmental parameters of the environment where the engine is located, even under different target factors, the actual values of the pre-vortex pressure and the required pre-vortex pressure rise in the non-exhaust throttle valve operating state corresponding to the same operation data of the engine have a slight deviation, so in order to obtain more accurate pre-vortex pressure and the required pre-vortex pressure rise, in the present application, after the pre-vortex pressure and the required pre-vortex pressure rise are calculated based on the operation data, the pre-vortex pressure and the required pre-vortex pressure rise are corrected by adopting the target factors.
After acquiring the pre-vortex pressure in the non-exhaust throttle valve action state matched with the operation data, before calculating the ratio of the actual pre-vortex pressure to the pre-vortex pressure before adjustment, the method further comprises: acquiring a value of a target factor, wherein the target factor is an environmental factor which is marked in advance and affects the pre-vortex pressure adjustment and the required pre-vortex pressure lifting degree; and correcting the pre-vortex pressure in the action state of the non-exhaust throttle valve based on the value of the target factor. In this embodiment, according to the degree of influence on the pre-vortex pressure and the required pre-vortex pressure rise degree by each parameter in the environmental factors, one or more target factors are determined from the environmental factors, then the current values of the target factors are established, compared with the standard values of the target factors, the deviation amounts caused by the pre-vortex pressure under each operation data are calculated, and then the deviation amounts and the pre-vortex pressure determined based on the operation data are subjected to addition operation, so as to obtain the corrected pre-vortex pressure. For example, referring to fig. 4, the operation data may include an engine speed and an engine injection amount, and the target factors may include an ambient pressure and an ambient temperature, in which, when determining the pre-adjustment vortex pressure based on the engine speed and the engine injection amount, a deviation amount of the pre-adjustment vortex pressure caused by the current ambient pressure and the current ambient temperature at the engine speed and the engine injection amount may be calculated, and then the pre-adjustment vortex pressure determined based on the engine speed and the engine injection amount and the deviation amount of the pre-adjustment vortex pressure may be added to obtain the pre-adjustment vortex pressure Psbas corrected based on the ambient pressure and the ambient temperature, and a subsequent analysis operation may be performed based on the pre-adjustment vortex pressure Psbas.
After obtaining the required pre-vortex pressure lifting degree matched with the operation data, and before performing closed-loop calculation based on the actual pre-vortex pressure lifting degree and the required pre-vortex pressure lifting degree to obtain the target opening of the exhaust throttle valve, the method further comprises the following steps: and correcting the required pre-vortex pressure lifting degree based on the value of the target factor. For example, referring to fig. 5, the operation data may include an engine speed and an engine fuel injection amount, and the target factors may include an ambient pressure and an ambient temperature, in this case, when the required pre-vortex pressure lifting degree is corrected based on the value of the target factor, a deviation amount of the required pre-vortex pressure lifting degree caused by the current ambient pressure and the current ambient temperature under the engine speed and the engine fuel injection amount may be calculated, and then, an addition operation is performed on the required pre-vortex pressure lifting degree determined based on the engine speed and the engine fuel injection amount and the deviation amount of the required pre-vortex pressure lifting degree, to obtain the required pre-vortex pressure lifting degree corrected based on the ambient pressure and the ambient temperature, and a subsequent analysis operation is performed based on the required pre-vortex pressure lifting degree.
In the technical scheme disclosed in this embodiment, an accurate P3bas is required for calculating the actual pressure rise, so a filtering module is required to perform filtering processing on the pre-adjustment pre-vortex pressure P3bas. Since the actual pre-vortex pressure P3 is derived from the change in the intake air amount during the change in the engine load, the speed of change in the intake air amount is different due to turbo lag or the like, the change in the actual pre-vortex pressure P3 is also different, and the trend of change in the intake air amount and the change in the actual pre-vortex pressure P3 are close. In this solution, the actual pre-vortex pressure lifting degree needs to be calculated based on the pre-vortex pressure before adjustment and the actual pre-vortex pressure, where the pre-vortex pressure before adjustment P3bas is consistent with the change rate of the actual pre-vortex pressure P3, see fig. 4, after determining the change rate of the pre-vortex pressure before adjustment P3bas, a filtering time curve based on the change rate needs to be determined, the filtering time of the pre-vortex pressure before adjustment P3bas is determined, filtering processing is performed on the pre-vortex pressure before adjustment P3bas based on the filtering time, the post-vortex pressure before adjustment P3basflt is obtained, and the actual pre-vortex pressure lifting degree is obtained by filtering the pre-vortex pressure before adjustment P3bas based on the filtering time, so that the obtained pre-vortex pressure before adjustment P3bas has higher stability, and the problem of abnormal smoke exhaust valve caused by engine transient state control is prevented. Specifically, in this scheme, filtering processing is performed on the pre-adjustment vortex pressure, which may specifically include: calculating the real-time change rate of the pre-vortex pressure before adjustment; acquiring real-time filtering time matched with the real-time change rate based on a mapping relation (which can be the filtering time curve) between the preset change rate and the filtering time; and filtering the pre-adjustment pre-vortex pressure based on the real-time filtering time.
In the technical solution disclosed in this embodiment, after controlling the opening of the exhaust throttle valve based on the target opening, in order to ensure that the emission of the vehicle meets the emission index, the engine exhaust smoke level needs to be detected, and when the engine exhaust smoke level is detected to be greater than the preset smoke level, the opening of the exhaust throttle valve is increased to reduce the engine exhaust smoke level. Therefore, referring to fig. 6, after controlling the opening of the exhaust throttle valve based on the target opening, it further includes:
step S107: and judging whether the exhaust smoke intensity of the engine is larger than the preset smoke intensity.
In this scheme, the engine control system directly or adopts the relevant sensor to obtain the engine exhaust smoke intensity, the said presetted smoke intensity is a calibrated value meeting emission standard calibrated in advance, in this step, compare the said engine exhaust smoke intensity with said presetted smoke intensity, judge whether need adjust the opening degree of the said exhaust throttle valve based on the comparison result.
Step S108: and when the engine exhaust smoke intensity is larger than the preset smoke intensity, increasing the opening of the exhaust throttle valve based on the difference value between the engine exhaust smoke intensity and the preset smoke intensity.
In this step, the difference between the engine exhaust smoke level and the preset smoke level is different, and the opening degree of the exhaust throttle valve to be increased is different, and the greater the difference is, the greater the opening degree of the exhaust throttle valve to be increased is, so after the difference between the engine exhaust smoke level and the preset smoke level is determined, the opening degree of the exhaust throttle valve to be increased is determined based on the difference. Further, in order to reduce the opening of the exhaust throttle valve in order to prevent the re-establishment of the step S101 and the subsequent operations after preventing the opening of the exhaust throttle valve from being increased due to the excessive exhaust smoke of the engine, the present application further includes, after increasing the opening of the exhaust throttle valve, the step S101 of reducing the opening of the exhaust throttle valve to cause the exhaust smoke of the engine to be larger than the preset smoke again: setting a preset time period, and inhibiting the opening degree adjustment of the exhaust throttle valve in the next preset time period after the opening degree of the exhaust throttle valve is increased, namely controlling the opening degree of the exhaust throttle valve to be unchanged in the time period, and releasing the locking of the exhaust throttle valve after the preset time period is over.
In this embodiment, an exhaust throttle valve control device is disclosed, and specific working contents of each unit in the device are referred to the contents of the above method embodiment.
The exhaust throttle valve control apparatus provided in the embodiment of the present invention will be described below, and the exhaust throttle valve control apparatus described below and the exhaust throttle valve control method described above may be referred to in correspondence with each other.
Referring to fig. 7, an exhaust throttle valve control apparatus disclosed in an embodiment of the present application may include:
a data acquisition unit 10 for acquiring operation data of the engine and actual pre-vortex pressure;
a pre-vortex pressure acquisition unit 20, configured to acquire pre-vortex pressure in the non-exhaust throttle valve operating state matched with the operation data, and record as pre-vortex pressure adjustment;
an actual lift degree calculation unit 30 for calculating a ratio of the actual pre-vortex pressure to the pre-vortex pressure before adjustment as an actual pre-vortex pressure lift degree;
a demand lifting degree calculating unit 40, configured to obtain a demand pre-vortex pressure lifting degree matched with the operation data;
an opening adjustment unit 50, configured to perform closed-loop calculation based on the actual pre-vortex pressure lifting degree and the required pre-vortex pressure lifting degree, so as to obtain a target opening of the exhaust throttle valve; and controlling the opening of the exhaust throttle valve based on the target opening.
The specific functions of the data acquisition unit 10, the pre-vortex pressure acquisition unit 20, the actual lifting degree calculation unit 30, the required lifting degree calculation unit 40, and the opening degree adjustment unit 50 described above can be shown in the above-described method embodiments, and are not described here in detail.
Fig. 8 is a hardware configuration diagram of an exhaust throttle valve control apparatus according to an embodiment of the present invention, which may be integrated in an engine controller, as shown in fig. 8, may include: at least one processor 100, at least one communication interface 200, at least one memory 300, and at least one communication bus 400;
in the embodiment of the present invention, the number of the processor 100, the communication interface 200, the memory 300 and the communication bus 400 is at least one, and the processor 100, the communication interface 200 and the memory 300 complete the communication with each other through the communication bus 400; it will be apparent that the communication connection schematic shown in the processor 100, the communication interface 200, the memory 300 and the communication bus 400 shown in fig. 8 is only optional;
alternatively, the communication interface 200 may be an interface of a communication module, such as an interface of a GSM module;
the processor 100 may be a central processing unit CPU, or a specific integrated circuit ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement embodiments of the present invention.
Memory 300 may comprise high-speed RAM memory or may further comprise non-volatile memory (non-volatile memory), such as at least one disk memory.
The processor 100 is specifically configured to perform the steps of the exhaust throttle control method disclosed in any of the foregoing embodiments of the present application, for example, to:
acquiring operation data and actual pre-vortex pressure of an engine;
acquiring the pre-vortex pressure of the non-exhaust throttle valve in the action state matched with the operation data, and recording the pre-vortex pressure as the pre-vortex pressure;
calculating the ratio of the actual pre-vortex pressure to the pre-vortex pressure before adjustment as an actual pre-vortex pressure lifting degree;
acquiring a required pre-vortex pressure lifting degree matched with the operation data;
performing closed-loop calculation based on the actual pre-vortex pressure lifting degree and the required pre-vortex pressure lifting degree to obtain a target opening degree of the exhaust throttle valve;
and controlling the opening of the exhaust throttle valve based on the target opening.
Corresponding to the above device, the application also discloses an automobile which can comprise the exhaust throttle valve control device.
For convenience of description, the above system is described as being functionally divided into various modules, respectively. Of course, the functions of each module may be implemented in the same piece or pieces of software and/or hardware when implementing the present invention.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for a system or system embodiment, since it is substantially similar to a method embodiment, the description is relatively simple, with reference to the description of the method embodiment being made in part. The systems and system embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
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 elements and steps are described above generally in terms of functionality in order to clearly illustrate the 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 solution. 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 steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. The software modules may be disposed in Random Access Memory (RAM), memory, read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
It is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, 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 one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
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 (10)
1. An exhaust throttle valve control method, characterized by comprising:
acquiring operation data and actual pre-vortex pressure of an engine;
acquiring the pre-vortex pressure of the non-exhaust throttle valve in the action state matched with the operation data, and recording the pre-vortex pressure as the pre-vortex pressure;
calculating the ratio of the actual pre-vortex pressure to the pre-vortex pressure before adjustment as an actual pre-vortex pressure lifting degree;
acquiring a required pre-vortex pressure lifting degree matched with the operation data;
performing closed-loop calculation based on the actual pre-vortex pressure lifting degree and the required pre-vortex pressure lifting degree to obtain a target opening degree of the exhaust throttle valve;
and controlling the opening of the exhaust throttle valve based on the target opening.
2. The exhaust throttle valve control method according to claim 1, characterized by further comprising, after acquiring the pre-vortex pressure in the no-exhaust throttle valve operation state matched with the operation data, before calculating the ratio of the actual pre-vortex pressure to the pre-vortex pressure before adjustment:
acquiring a value of a target factor, wherein the target factor is an environmental factor which is marked in advance and affects the pre-vortex pressure adjustment and the required pre-vortex pressure lifting degree;
correcting the pre-vortex pressure in the non-exhaust throttle valve action state based on the value of the target factor;
after obtaining the required pre-vortex pressure lifting degree matched with the operation data, and before performing closed-loop calculation based on the actual pre-vortex pressure lifting degree and the required pre-vortex pressure lifting degree to obtain the target opening of the exhaust throttle valve, the method further comprises the following steps:
and correcting the required pre-vortex pressure lifting degree based on the value of the target factor.
3. The exhaust throttle valve control method according to claim 1, characterized in that acquiring the pre-vortex pressure in the no-exhaust throttle valve operation state matched with the operation data, recorded as the pre-vortex pressure before adjustment, before calculating the ratio of the actual pre-vortex pressure to the pre-vortex pressure before adjustment, further comprises:
and filtering the pre-vortex pressure before adjustment.
4. The exhaust throttle valve control method according to claim 3, characterized in that filtering the pre-adjustment pre-vortex pressure includes:
calculating the real-time change rate of the pre-vortex pressure before adjustment;
acquiring real-time filtering time matched with the real-time change rate based on a mapping relation between the preset change rate and the filtering time;
and filtering the pre-adjustment pre-vortex pressure based on the real-time filtering time.
5. The exhaust throttle valve control method according to claim 1, characterized in that the operation data includes at least: engine speed and engine fuel injection quantity.
6. The exhaust throttle valve control method according to claim 1, characterized by further comprising, after controlling the opening of the exhaust throttle valve based on the target opening:
judging whether the exhaust smoke intensity of the engine is larger than a preset smoke intensity;
and when the engine exhaust smoke intensity is larger than the preset smoke intensity, increasing the opening of the exhaust throttle valve based on the difference value between the engine exhaust smoke intensity and the preset smoke intensity.
7. The exhaust throttle valve control method according to claim 6, characterized by further comprising, after increasing the opening degree of the exhaust throttle valve:
and suppressing the opening degree adjustment of the exhaust throttle valve within a preset period after the opening degree of the exhaust throttle valve is increased.
8. An exhaust throttle valve control apparatus, characterized by comprising:
the data acquisition unit is used for acquiring the operation data and the actual pre-vortex pressure of the engine;
the pre-vortex pressure acquisition unit is used for acquiring pre-vortex pressure in the action state of the non-exhaust throttle valve matched with the operation data and recording the pre-vortex pressure as pre-vortex pressure adjustment;
an actual lifting degree calculation unit, configured to calculate a ratio of the actual pre-vortex pressure to the pre-vortex pressure before adjustment as an actual pre-vortex pressure lifting degree;
the demand lifting degree calculation unit is used for acquiring the demand pre-vortex pressure lifting degree matched with the operation data;
the opening adjusting unit is used for performing closed-loop calculation based on the actual pre-vortex pressure lifting degree and the required pre-vortex pressure lifting degree to obtain a target opening of the exhaust throttle valve; and controlling the opening of the exhaust throttle valve based on the target opening.
9. An exhaust throttle valve control apparatus, characterized by comprising:
a memory and a processor;
the memory is used for storing programs;
the processor configured to execute the program to implement the respective steps of the exhaust throttle valve control method according to any one of claims 1 to 7.
10. An automobile comprising the exhaust throttle valve control apparatus according to claim 9.
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| CN202311739595.8A CN117432533B (en) | 2023-12-18 | 2023-12-18 | Exhaust throttle valve control method, device, equipment and automobile |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311739595.8A CN117432533B (en) | 2023-12-18 | 2023-12-18 | Exhaust throttle valve control method, device, equipment and automobile |
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| CN117432533A CN117432533A (en) | 2024-01-23 |
| CN117432533B true CN117432533B (en) | 2024-03-19 |
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| CN117432533A (en) | 2024-01-23 |
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