CN116255241A - Transient control method and system of supercharger and vehicle - Google Patents
Transient control method and system of supercharger and vehicle Download PDFInfo
- Publication number
- CN116255241A CN116255241A CN202310316577.2A CN202310316577A CN116255241A CN 116255241 A CN116255241 A CN 116255241A CN 202310316577 A CN202310316577 A CN 202310316577A CN 116255241 A CN116255241 A CN 116255241A
- Authority
- CN
- China
- Prior art keywords
- transient
- supercharger
- air inlet
- engine
- rotating speed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/12—Control of the pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/12—Control of the pumps
- F02B2037/122—Control of rotational speed of the pump
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
The invention relates to the technical field of automobiles, in particular to a transient control method and system of a supercharger and a vehicle, wherein the transient control method of the supercharger comprises the following steps: when the transient starting condition of the supercharger is met, determining a required intake pressure value and approaching deviation according to the opening degree of an accelerator/brake pedal, the engine speed and the intake temperature; calculating an intake pressure difference according to the required intake pressure value and the actual intake pressure value; obtaining a starting critical value according to the required intake pressure value, the proximity deviation and the tolerance; PID control is carried out according to the air inlet pressure difference to obtain a PID regulation rotating speed, and the supercharger is controlled to rotate at the PID regulation rotating speed until the front pressure of the throttle reaches a starting pressure value; and simultaneously, acquiring an adjusting rotating speed according to the current rotating speed of the engine, and correcting the PID adjusting rotating speed according to the adjusting rotating speed until the front pressure of the throttle reaches a required pressure value. The method reduces the intensity of overshoot in transient conditions by sacrificing a certain response time.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a transient control method and system of a supercharger and a vehicle.
Background
The supercharger is one of core components of engine operation, and the compression action of the supercharger on fresh air can improve the air inflow, so that the combustion condition is improved, and the output power and the efficiency of the engine are further improved. In the related art, boost control is often implemented by PID (Proportion Integral Differential, proportional, integral, derivative) closed-loop feedback control. The boost pressure error is equal to the required boost pressure minus the actual boost pressure; wherein the gains of the proportional (i.e., P), integral (I) and differential (i.e., D) terms are obtained by using an error lookup table. When the required boost pressure changes, the PID control actual boost pressure follows the required boost pressure, and specifically, the opening value of the turbine nozzle vane is controlled by proportional, integral and differential calculation output of the 3 gain values P, I and D and error.
However, the PID has a certain delay in actually controlling the turbocharger. The delay is particularly obvious under the dynamic working condition with larger fluctuation; while the larger the turbine size, the more pronounced the retardation. The delay of PID control makes the actual boost pressure unable to follow the required boost pressure in time, the fluctuation of error becomes larger, the problem that P, I and D obtained by table lookup are too large or too small, and overshoot easily occurs when P, I and D are too large; when P, I and D are too small, an insufficient engine intake air amount is easily caused.
Disclosure of Invention
The invention aims to provide a transient control method and system of a supercharger and a vehicle, and aims to solve the problem that PID control fluctuation of the supercharger is large in the prior art.
The first aspect of the present invention provides a transient control method of a supercharger, the transient control method of the supercharger comprising the steps of:
when the transient opening condition of the supercharger is met, determining a required intake pressure value and approaching deviation according to the opening degree of an accelerator pedal or a brake pedal, the rotation speed of an engine and the intake temperature;
calculating an intake pressure difference according to the required intake pressure value and the actual intake pressure value;
obtaining a starting critical value according to the required intake pressure value, the proximity deviation and the tolerance;
PID control is carried out according to the air inlet pressure difference to obtain a PID regulation rotating speed, and the supercharger is controlled to rotate at the PID regulation rotating speed until the front pressure of the throttle reaches a starting pressure value; and simultaneously, obtaining a corrected rotating speed according to the current rotating speed of the engine, and correcting the PID regulating rotating speed according to the corrected rotating speed until the front pressure of the throttle reaches a required pressure value.
The transient control method of the supercharger provided by the invention can also have the following additional technical characteristics:
in one embodiment of the present invention, when the transient opening condition of the supercharger is satisfied, before determining the required intake pressure value and the proximity deviation according to the opening degree of the accelerator pedal or the brake pedal, the engine speed and the intake air temperature, the method further comprises:
judging whether a transient opening condition of the supercharger is met according to the change speed of the opening of the accelerator pedal during acceleration, wherein the transient opening condition is met when the change speed of the opening of the accelerator pedal is larger than a preset value;
or judging whether the transient opening condition of the supercharger is met according to the change speed of the opening of the brake pedal during deceleration, wherein the transient opening condition is met when the change speed of the opening of the brake pedal is larger than a preset value under the transient reduction working condition.
In one specific embodiment of the invention, when the transient increase condition is adopted, the starting critical value is obtained by subtracting the adjacent deviation and the tolerance from the required intake pressure value; and when the engine is in the transient reduction working condition, the starting critical value is the sum of a required air inlet value, a proximity deviation and a tolerance.
In one embodiment of the present invention, determining the required intake pressure value, the approach deviation, based on the accelerator pedal or brake pedal opening, the engine speed, and the intake air temperature includes:
determining the required torque and the approaching deviation of the engine according to the rotating speed of the engine and the opening degree of an accelerator pedal or a brake pedal;
and obtaining the required air inflow of the engine according to the required torque, and obtaining a required air inlet pressure value according to the required air inflow and the air inlet temperature.
The second aspect of the present invention also provides an instantaneous control system of a supercharger, comprising:
the first judging module is used for judging whether the automobile is in a transient working condition or not according to the real-time working condition of the automobile; and entering a next program when the automobile is in a transient working condition;
the first calculation module is used for calculating a required air inlet pressure value and a nearby deviation according to the opening degree of an automobile accelerator pedal or a brake pedal, the rotation speed of an engine and the air inlet temperature, and calculating an air inlet pressure difference according to the required air inlet pressure value and the actual air inlet pressure value; obtaining a starting critical value according to the required intake pressure value, the proximity deviation and the tolerance;
the second judging module is used for judging whether the front pressure of the throttle valve reaches a starting pressure value or not;
the second calculation module is used for calculating a correction rotating speed according to the rotating speed of the engine when the front throttle pressure reaches a starting pressure value;
the control module is used for performing PID control on the air inlet pressure difference to obtain a PID regulation rotating speed, and controlling the supercharger to rotate at the PID regulation rotating speed until the front pressure of the throttle reaches a starting regulation pressure value; and the device is also used for correcting the PID to adjust the rotating speed according to the corrected rotating speed until the front pressure of the throttle reaches the required pressure value.
In one embodiment of the present invention, the first computing module includes:
the required torque calculation module is used for determining the required torque of the engine according to the opening degree of the accelerator pedal or the brake pedal and the rotating speed of the engine;
the required air inlet pressure calculation module is used for obtaining the required air inlet amount of the engine according to the required torque and obtaining the required air inlet pressure according to the required air inlet amount and the air inlet temperature;
the pressure difference calculation module is used for calculating the air inlet pressure difference between the required air inlet pressure and the actual air inlet pressure;
the proximity deviation calculation module is used for calculating the proximity deviation according to the rotation speed of the engine;
and the starting critical value calculation module is used for calculating a starting critical value according to the required intake pressure and the adjacent deviation.
In one specific embodiment of the invention, the first judging module is used for judging whether the transient opening condition of the supercharger is met according to the change speed of the opening of the accelerator pedal, wherein the first judging module is in a transient increasing working condition when the change speed of the opening of the accelerator pedal is larger than a preset value, and the transient opening condition is met; the first judging module is further used for judging whether a transient opening condition of the supercharger is met according to the change speed of the opening of the brake pedal, wherein the transient opening condition is met when the change speed of the opening of the brake pedal is larger than a preset value and is in a transient reduction working condition.
In one specific embodiment of the invention, when the instantaneous increasing working condition is in, the first calculation module subtracts the adjacent deviation and the tolerance according to the required intake pressure value to calculate and obtain a starting critical value; and when the engine is in the transient reduction working condition, the first calculation module calculates a starting critical value according to the sum of the required air inlet value, the adjacent deviation and the tolerance.
In one embodiment of the invention, the engine further comprises a worm wheel pressure sensor and a temperature sensor, wherein the worm wheel pressure sensor and the temperature sensor are arranged between the supercharger and a throttle valve of the engine and are used for detecting an intake air pressure value and a gas temperature in front of the throttle valve.
The third aspect of the invention also provides a vehicle provided with a transient control system of a supercharger as described in any one of the preceding claims.
The invention provides a transient control method of a supercharger, which introduces the concept of close deviation based on the existing PID closed loop feedback control method, defines a tuning critical value through the close deviation, influences the change of the pre-throttle pressure value at a certain adjusting rate once the actual value of the pre-throttle pressure exceeds the tuning critical value, and reduces the intensity of tuning by sacrificing a certain corresponding time.
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 needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a graph of pressure change before a throttle valve controlled by PID closed loop feedback under transient conditions in the prior art;
FIG. 2 is a graph of pressure value changes before throttle in a transient control method of a supercharger of the present application;
FIG. 3 is a flow chart of a method of transient control of a supercharger in the present application;
fig. 4 is a block diagram of the transient control system of the supercharger of the present application.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an order of performance is explicitly stated. It should also be appreciated that additional or alternative steps may be used.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For ease of description, spatially relative terms, such as "inner," "outer," "lower," "below," "upper," "above," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein interpreted accordingly.
Before describing the control method of the turbocharger according to the embodiment of the invention, an engine system is described first, specifically, the engine system includes an engine, a turbocharger, and an electrically controlled exhaust bypass valve, wherein an exhaust portion of the engine is connected to a turbine of the turbocharger, an intake portion of the engine is connected to the turbocharger of the turbocharger, the electrically controlled exhaust bypass valve is disposed on an exhaust pipe of the engine, and is controlled by a PID closed loop feedback control method, for adjusting a rotational speed of the turbocharger, thereby adjusting a boost pressure, and the pressure-adjusted gas enters the engine through the throttle valve. Due to the delay of the PID closed-loop feedback control method, overshoot is easy to occur under the working condition with larger fluctuation (transient working condition), as shown in fig. 1.
Based on the above, the invention provides a transient control method of a supercharger, which is further improved on the original PID closed-loop feedback control method, so as to improve the overshoot phenomenon of the actual front pressure of a throttle and improve the control stability.
As shown in fig. 2-3, the transient control method of the supercharger according to one embodiment of the present invention includes the steps of:
when the transient opening condition of the supercharger is met, a required intake pressure value and a near deviation are determined according to the opening degree of an accelerator pedal or a brake pedal, the rotation speed of an engine and the intake temperature.
In a specific embodiment of the present invention, when the transient opening condition of the supercharger is satisfied, before determining the required intake pressure value and the proximity deviation according to the opening degree of the accelerator pedal or the brake pedal, the engine speed and the intake air temperature, it may be determined in advance whether the transient adjustment opening condition of the supercharger is satisfied, specifically, including:
judging whether a transient opening condition of the supercharger is met or not according to the change speed of the opening of the accelerator pedal, wherein the transient opening condition is met when the change speed of the opening of the accelerator pedal is larger than a preset value;
or judging whether the transient opening condition of the supercharger is met according to the change speed of the opening of the brake pedal, wherein the transient opening condition is met when the change speed of the opening of the brake pedal is larger than a preset value under the transient reduction working condition.
The preset value can be obtained by calibration in advance, and is a limit of whether the vehicle is accelerated rapidly or accelerated slowly in the transient increasing working condition, namely: the faster the accelerator pedal is depressed, the more the driver wants to accelerate the vehicle quickly, whereas if the accelerator pedal is depressed very slowly, the driver wants to accelerate the vehicle, but only the vehicle can accelerate relatively slowly.
Therefore, the opening degree of the accelerator pedal can be detected in real time, if the depth of the accelerator pedal in unit time is very deep, the change speed of the opening degree of the accelerator pedal is very high, once the change speed exceeds a preset value, the driver is required to accelerate the vehicle rapidly, the transient opening condition of the supercharger is met at the moment, the supercharger is triggered to start transient control, and otherwise, the transient opening condition of the supercharger is not triggered.
Similarly, the method for judging whether the opening degree of the brake pedal triggers the transient control of the supercharger during deceleration is basically the same as the method for judging during acceleration.
When the transient opening condition of the supercharger is satisfied, firstly, the required torque of the engine is determined according to the opening degree of an accelerator pedal or a brake pedal and the rotation speed of the engine. And inquiring an accelerator pedal/brake pedal mapping table (accelerator/brake pedal map) according to the opening degree of an accelerator pedal or a brake pedal and the rotating speed of the engine to obtain corresponding required torque. The accelerator pedal/brake pedal map can be calibrated in advance, the abscissa of the map is the engine speed, the ordinate of the map is the accelerator pedal/brake pedal opening, and the content of the intersection point between the engine speed and the accelerator pedal/brake pedal opening is the corresponding required torque.
And secondly, obtaining the required air inflow of the engine according to the required torque, and obtaining the required air inlet pressure according to the required air inflow and the air inlet temperature.
The required air inflow is the air inflow required by reaching the required torque, and can be obtained through calculation of the required torque, and then the required air inflow pressure can be obtained according to the current air inflow temperature and the required air inflow. Specifically, the required intake pressure is obtained through the required torque, and is firstly queried in a preset mapping table, and is marked as an FMTC map, wherein the abscissa of the FMTC map is the engine speed, the ordinate is the required torque, and the content is the oil quantity required by each working cycle of the engine, namely: the oil quantity of each cycle is multiplied by the equivalence ratio under the working condition to obtain the required air inflow, wherein the equivalence ratio is according to a preset equivalence ratio mapping table, namely: the equivalence ratio map is obtained by inquiring, wherein the abscissa of the equivalence ratio map is the engine speed, the ordinate is the required torque, and the content is the mass ratio of the gas amount to the oil amount. And finally, determining the required intake pressure according to the required intake air amount and the intake air temperature.
It should be noted that the FMTC map and the equivalence ratio map may be obtained by calibration in advance, for example: and obtaining the corresponding relation among the engine rotating speed, the required torque, the required oil quantity and the mass ratio of the gas quantity to the oil quantity in a test mode, and then respectively forming an FMTC map and an equivalence ratio map for inquiry.
Again, the approach deviation is obtained from the engine speed. Specifically, the proximity deviation is a defined value, which refers to a pressure value of the proximity demand pressure, the value of which is affected by the model of the engine, and specifically, the proximity deviation mapping table (proximity deviation map) corresponding to the model of the engine can be queried according to the engine speed to obtain the corresponding proximity deviation. Wherein the proximity deviation map can be obtained by pre-calibration, for example: based on the two conditions that overshoot is controlled in an ideal range and response time is not suitable to be too long, an adjacent deviation map is established in a test mode, wherein the abscissa is the engine speed and the ordinate is the adjacent deviation.
And thirdly, calculating the air inlet pressure difference according to the required air inlet pressure value and the actual air inlet pressure value. Specifically, the intake pressure difference is obtained by making a difference between the required intake pressure value (i.e., the required boost pressure) and the actual intake pressure (the actual boost pressure). The actual intake pressure may be detected by a pressure sensor installed at the throttle valve.
And obtaining a starting critical value according to the required intake pressure value, the proximity deviation and the tolerance. Specifically, the tolerance is a constant, the value of the tolerance is determined according to the model of the engine, and the starting critical value is a value obtained by subtracting the adjacent deviation and the tolerance from the required intake pressure value during acceleration; and during deceleration, the starting critical value is the sum of a required air intake value, a proximity deviation and a tolerance.
And thirdly, PID control is carried out according to the air inlet pressure difference to obtain a PID regulation rotating speed, and the supercharger is controlled to rotate at the PID regulation rotating speed until the front pressure of the throttle reaches a starting pressure value.
Again, the corrected rotational speed is obtained from the current engine rotational speed. Specifically, the engine speed when the throttle front pressure reaches the starting pressure value is obtained, and then a correction speed mapping table (correction speed map) is inquired according to the engine speed to obtain the corresponding correction speed. The corrected rotation speed map may be obtained by calibration in advance, for example: based on two conditions that overshoot is controlled in an ideal range and response time is not suitable to be too long, a correction rotation speed map with an abscissa being the rotation speed of the engine and an ordinate being the correction rotation speed is established in a test mode.
And finally, correcting the PID to adjust the rotating speed according to the corrected rotating speed until the front pressure of the throttle reaches the required pressure value.
According to the transient control method of the supercharger, after the transient control starting condition of the supercharger is met, for example, when the vehicle is in rapid acceleration or rapid deceleration, the pressure of the gas entering the engine can be controlled by the method, so that the pressure of the gas slowly changes when the pressure of the gas reaches the required intake pressure, as shown in fig. 2. By sacrificing a certain response time (t 1 <t 2 ) The phenomenon of obvious overshoot of the actual value caused by overlarge deviation is avoided, so that the intensity of overshoot is reduced, and the stability of control is improved.
As shown in fig. 4, the instantaneous control system of the supercharger disclosed in an embodiment of the present invention includes a first judging module, a first calculating module, a second judging module, a second calculating module and a control module.
The first judging module is used for judging whether the automobile is in a transient working condition or not according to the real-time working condition of the automobile; and entering a next program when the automobile is in a transient working condition; the first calculation module is used for calculating a required air inlet pressure value and a nearby deviation according to the opening degree of an automobile accelerator pedal or a brake pedal, the rotation speed of an engine and the air inlet temperature, and calculating an air inlet pressure difference according to the required air inlet pressure value and the actual air inlet pressure value; obtaining a starting critical value according to the required intake pressure value, the proximity deviation and the tolerance; the second judging module judges whether the front pressure of the throttle valve reaches a starting pressure value or not; the second calculation module is used for calculating a correction rotating speed according to the rotating speed of the engine when the front throttle pressure reaches a starting pressure value; the control module is used for performing PID control on the air inlet pressure difference to obtain a PID regulation rotating speed, and is also used for controlling the supercharger to rotate at the PID regulation rotating speed until the front pressure of the throttle reaches a starting regulation pressure value; and the device is also used for correcting the PID to adjust the rotating speed according to the corrected rotating speed until the front pressure of the throttle reaches the required pressure value.
Further, the first calculation module includes a required torque calculation module, a required intake pressure calculation module, a pressure difference calculation module, a proximity deviation calculation module, and a start-up threshold calculation module. The required torque calculation module is used for determining the required torque of the engine according to the engine speed and the opening degree of an accelerator pedal or a brake pedal; the required air inlet pressure calculation module is used for obtaining the required air inlet amount of the engine according to the required torque and obtaining the required air inlet pressure according to the required air inlet amount and the air inlet temperature; the pressure difference calculation module is used for calculating the air inlet pressure difference between the required air inlet pressure and the actual air inlet pressure; the adjacent deviation calculation module is used for calculating adjacent deviation according to the rotation speed of the engine; the starting critical value calculation module is used for calculating a starting critical value according to the required intake pressure and the adjacent deviation.
Further, the first judging module is used for judging whether a transient opening condition of the supercharger is met according to the change speed of the opening of the accelerator pedal, wherein the transient opening condition is met when the change speed of the opening of the accelerator pedal is larger than a preset value; the first judging module is used for judging whether the transient opening condition of the supercharger is met according to the change speed of the opening of the brake pedal, wherein the first judging module is in a transient reduction working condition when the change speed of the opening of the brake pedal is larger than a preset value, and the transient opening condition is met.
Further, when the instantaneous increasing working condition is met, the first calculation module subtracts the adjacent deviation and the tolerance according to the required air inlet pressure value to calculate and obtain a starting critical value; and when the engine is in the transient reduction working condition, the first calculation module calculates a starting critical value according to the sum of the required air inlet value, the adjacent deviation and the tolerance.
Further, the engine throttle valve further comprises a worm wheel pressure sensor and a temperature sensor, wherein the worm wheel pressure sensor and the temperature sensor are arranged between the supercharger and the throttle valve of the engine and are used for detecting the air inlet pressure value and the air temperature in front of the throttle valve.
It should be noted that, the specific implementation manner of the transient control system of the supercharger in the embodiment of the present invention is similar to the specific implementation manner of the transient control method of the supercharger in the embodiment of the present invention, and specific please refer to the description of the method section, which is not repeated here.
Further, an embodiment of the invention discloses a vehicle provided with the control system of the electronic supercharger in any one of the above embodiments. The severity of overshoot is reduced by sacrificing a certain response time during transient conditions of the vehicle.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (10)
1. A method for transient control of a supercharger, comprising the steps of:
when the transient opening condition of the supercharger is met, determining a required intake pressure value and approaching deviation according to the opening degree of an accelerator pedal or a brake pedal, the rotation speed of an engine and the intake temperature;
calculating an intake pressure difference according to the required intake pressure value and the actual intake pressure value;
obtaining a starting critical value according to the required intake pressure value, the proximity deviation and the tolerance;
PID control is carried out according to the air inlet pressure difference to obtain a PID regulation rotating speed, and the supercharger is controlled to rotate at the PID regulation rotating speed until the front pressure of the throttle reaches a starting pressure value; and simultaneously, obtaining a corrected rotating speed according to the current rotating speed of the engine, and correcting the PID regulating rotating speed according to the corrected rotating speed until the front pressure of the throttle reaches a required pressure value.
2. The method according to claim 1, wherein when the transient opening condition of the supercharger is satisfied, before determining the required intake pressure value, the proximity deviation, based on the accelerator pedal or brake pedal opening, the engine speed, and the intake air temperature, further comprising:
judging whether a transient opening condition of the supercharger is met or not according to the change speed of the opening of the accelerator pedal, wherein the transient opening condition is met when the change speed of the opening of the accelerator pedal is larger than a preset value;
or judging whether the transient opening condition of the supercharger is met according to the change speed of the opening of the brake pedal, wherein the transient opening condition is met when the change speed of the opening of the brake pedal is larger than a preset value under the transient reduction working condition.
3. The method according to claim 2, wherein the starting threshold is obtained by subtracting the proximity deviation and the tolerance from the required intake pressure value when the transient boost condition is in the transient boost condition; and when the engine is in the transient reduction working condition, the starting critical value is the sum of a required air inlet value, a proximity deviation and a tolerance.
4. The method of transient control of a supercharger of claim 1 wherein determining a desired intake pressure value, approach bias, based on accelerator pedal or brake pedal opening, engine speed, and intake air temperature comprises:
determining the required torque and the approaching deviation of the engine according to the rotating speed of the engine and the opening degree of an accelerator pedal or a brake pedal;
and obtaining the required air inflow of the engine according to the required torque, and obtaining a required air inlet pressure value according to the required air inflow and the air inlet temperature.
5. A transient control system of a supercharger, comprising:
the first judging module is used for judging whether the automobile is in a transient working condition or not according to the real-time working condition of the automobile; and entering a next program when the automobile is in a transient working condition;
the first calculation module is used for calculating a required air inlet pressure value and a nearby deviation according to the opening degree of an automobile accelerator pedal or a brake pedal, the rotation speed of an engine and the air inlet temperature, and calculating an air inlet pressure difference according to the required air inlet pressure value and the actual air inlet pressure value; obtaining a starting critical value according to the required intake pressure value, the proximity deviation and the tolerance;
the second judging module is used for judging whether the front pressure of the throttle valve reaches a starting pressure value or not;
the second calculation module is used for calculating a correction rotating speed according to the rotating speed of the engine when the front throttle pressure reaches a starting pressure value;
the control module is used for performing PID control on the air inlet pressure difference to obtain a PID regulation rotating speed, and controlling the supercharger to rotate at the PID regulation rotating speed until the front pressure of the throttle reaches a starting regulation pressure value; and the device is also used for correcting the PID to adjust the rotating speed according to the corrected rotating speed until the front pressure of the throttle reaches the required pressure value.
6. The transient control system of a supercharger of claim 5 wherein the first calculation module comprises:
the required torque calculation module is used for determining the required torque of the engine according to the opening degree of the accelerator pedal or the brake pedal and the rotating speed of the engine;
the required air inlet pressure calculation module is used for obtaining the required air inlet amount of the engine according to the required torque and obtaining the required air inlet pressure according to the required air inlet amount and the air inlet temperature;
the pressure difference calculation module is used for calculating the air inlet pressure difference between the required air inlet pressure and the actual air inlet pressure;
the proximity deviation calculation module is used for calculating the proximity deviation according to the rotation speed of the engine;
and the starting critical value calculation module is used for calculating a starting critical value according to the required intake pressure and the adjacent deviation.
7. The instantaneous control system of the supercharger of claim 5 wherein the first determination module is configured to determine whether a transient opening condition of the supercharger is met according to a rate of change of an opening of an accelerator pedal, wherein the instantaneous opening condition is met when the rate of change of the opening of the accelerator pedal is greater than a preset value; the first judging module is further used for judging whether a transient opening condition of the supercharger is met according to the change speed of the opening of the brake pedal, wherein the transient opening condition is met when the change speed of the opening of the brake pedal is larger than a preset value and is in a transient reduction working condition.
8. The instantaneous control system of the supercharger of claim 7 wherein the first calculation module calculates a start-up threshold based on the desired charge pressure value while subtracting the approach bias, tolerance calculation when in the instantaneous boost condition; and when the engine is in the transient reduction working condition, the first calculation module calculates a starting critical value according to the sum of the required air inlet value, the adjacent deviation and the tolerance.
9. The instantaneous control system of the supercharger of claim 5 further comprising a turbine pressure sensor and temperature sensor disposed between the supercharger and the throttle of the engine for detecting intake pressure values and gas temperatures before the throttle.
10. A vehicle provided with a transient control system of a supercharger according to any one of claims 5-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310316577.2A CN116255241A (en) | 2023-03-24 | 2023-03-24 | Transient control method and system of supercharger and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310316577.2A CN116255241A (en) | 2023-03-24 | 2023-03-24 | Transient control method and system of supercharger and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116255241A true CN116255241A (en) | 2023-06-13 |
Family
ID=86687972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310316577.2A Pending CN116255241A (en) | 2023-03-24 | 2023-03-24 | Transient control method and system of supercharger and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116255241A (en) |
-
2023
- 2023-03-24 CN CN202310316577.2A patent/CN116255241A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6128902A (en) | Control method and apparatus for turbocharged diesel engines having exhaust gas recirculation | |
| KR100750029B1 (en) | Control apparatus for internal combustion engine and control method for the same | |
| US7540148B2 (en) | Method and device for operating at least one turbocharger on an internal combustion engine | |
| JP5627733B1 (en) | Wastegate valve control device for internal combustion engine and wastegate valve control method for internal combustion engine | |
| CN107013320B (en) | Control method and system of electronic supercharger and vehicle | |
| JP2003526044A (en) | Method and apparatus for controlling the boost pressure of an internal combustion engine | |
| JP2957279B2 (en) | Method and apparatus for controlling operating variables of an internal combustion engine | |
| US20200132002A1 (en) | Throttle controller and throttle controlling method | |
| US9970366B2 (en) | Control apparatus | |
| US6055811A (en) | Apparatus and method for controlling the air flow into an engine | |
| CN101105152A (en) | Method for the regulation of the boost pressure of an internal combustion engine | |
| KR20190002048A (en) | Method for Dualizing Throttle Acceleration Control and Vehicle thereof | |
| US10876468B2 (en) | Method for controlling a turbocharging system | |
| US5623905A (en) | Method and arrangement for controlling an internal combustion engine | |
| CN110318897A (en) | A kind of electric-control motor control method based on smoke intensity limitation | |
| JPH0739818B2 (en) | Idle speed control device for internal combustion engine | |
| CN116255241A (en) | Transient control method and system of supercharger and vehicle | |
| US10895207B2 (en) | Method of operating an engine assembly | |
| US6581382B2 (en) | Method and apparatus for controlling a supply system for a combustion engine | |
| US20190162112A1 (en) | Controller and control method for wastegate | |
| JP2001214798A (en) | Method and device for determining driver type | |
| CN114341475A (en) | EGR control method and EGR control device | |
| JP3239770B2 (en) | Control device for intake throttle valve of internal combustion engine | |
| JP3835167B2 (en) | Control device for internal combustion engine | |
| US11933234B2 (en) | Supercharging pressure control method and supercharging pressure control device for internal combustion engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |