CN108869069B - Method, device and system for controlling opening of throttle valve of automobile - Google Patents
Method, device and system for controlling opening of throttle valve of automobile Download PDFInfo
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- CN108869069B CN108869069B CN201810705900.4A CN201810705900A CN108869069B CN 108869069 B CN108869069 B CN 108869069B CN 201810705900 A CN201810705900 A CN 201810705900A CN 108869069 B CN108869069 B CN 108869069B
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- opening
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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
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0002—Controlling intake air
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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
- F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction 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
- F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
- F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
- F02D2009/0201—Arrangements; Control features; Details thereof
- F02D2009/023—Engine speed
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- 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)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Abstract
The invention provides a method, a device and a system for controlling the opening of a throttle valve of an automobile engine. The method may comprise: determining an opening degree adjusting period based on a difference value between the current engine rotating speed and the target rotating speed; determining the amplitude of the opening of the throttle valve based on the difference between the current engine speed and the target speed when the opening adjustment period is met; performing an opening adjustment based on a magnitude of the opening. Therefore, the opening degree of the throttle valve of the variable-parameter automobile engine can be adjusted, and the engine can be effectively and quickly brought into an ideal operating condition to avoid overshoot.
Description
Technical Field
The invention relates to the technical field of hybrid vehicles, in particular to a method, a device and a system for controlling the opening of a carburetor throttle valve of a hybrid vehicle.
Background
With the improvement of environmental awareness of people, energy conservation and environmental protection are gradually merged into the intravenous drip of our life. The transformation of the automobile industry has become common knowledge, and the main power sources of the hybrid electric vehicle are a battery, an engine and a generator, only a gasoline engine is added as standby power on the basis of a pure electric vehicle, so that the hybrid electric vehicle has the remarkable advantages of multiple power sources, energy conservation, low emission and the like, and has attracted high attention worldwide.
The throttle opening degree of an automobile engine refers to the opening angle of the engine throttle. The throttle valve of an automobile engine is operated by a driver via an accelerator pedal to change the intake air amount of the engine, thereby controlling the operation of the engine. While different throttle openings indicate different operating conditions of the engine. An electronic throttle system is generally adopted in modern automobiles, a driver operates an accelerator pedal, a corresponding voltage signal generated by an accelerator pedal position sensor is input into a throttle control unit, the control unit firstly filters the input signal to eliminate the influence of environmental noise, then the intention of the driver is analyzed according to the current working mode, the pedal movement amount and the change rate, the basic requirement on the engine torque is calculated, and the basic expected value of the corresponding throttle angle is obtained. Then the signals are communicated with a finished automobile control unit through a CAN bus to obtain other working condition information and various sensor signals such as engine rotating speed, gear, throttle position, air conditioner energy consumption and the like, so that all torques required by the finished automobile are calculated, the optimal opening of the throttle is obtained by compensating the expected value of the throttle angle, and a corresponding voltage signal is sent to a driving circuit module to drive a control motor to enable the throttle to reach the optimal opening position. The throttle position sensor feeds back the opening signal of the throttle to the throttle control unit to form closed-loop position control.
In the prior art, PID control is generally adopted for regulating and controlling the opening of the throttle valve, namely control is carried out according to proportion (P), integral (I) and differential (D) of deviation, and in the process, setting parameters all adopt fixed coefficients, so that the control method has great advantages in eliminating static error and improving control precision during execution. However, when the engine is started or stopped or the set value is greatly disturbed or changed, the increment is not changed in the whole control process because the coefficient is constant, and the system output has great deviation in a short time. Due to the large deviation and the inertia and hysteresis of the system, the integral term will produce large overshoot and long-term fluctuation.
For example, the output of the PID controller is increased due to continuous increment, the actuator reaches a limit position, if the output of the controller is increased continuously, the opening of the actuator cannot be increased any more, and the control quantity output by the computer exceeds a normal operation range and enters a saturation region. Only if the system has reverse deviation, the system can gradually exit from the saturation region. And the deeper the saturation region is entered, the longer the saturation region is exited. During this time, the actuator remains in the limit position and does not change immediately as the deviation reverses, and the system behaves as if it were runaway, causing deterioration in control performance, which is known as an integral saturation phenomenon or integral runaway phenomenon.
Therefore, a regulation scheme capable of controlling the constant rotating speed of the carburetor of the automobile engine is urgently needed, and the engine can be effectively and quickly enabled to enter an ideal operating condition to avoid overshoot.
Disclosure of Invention
To this end, the basic idea of the invention is to provide a variable-parameter PID regulation so that the incremental accumulation speed can be changed, while the parameter correction is performed in real time according to the deviation magnitude of the system to regulate the coefficient magnitude so as to correspond to the deviation magnitude. Therefore, according to the technical scheme of the invention, when the system deviation is small, the increment effect is weakened or even completely absent, and when the deviation is large, the increment is strengthened, so that the engine can be effectively and quickly brought into an ideal operation condition and the constant rotating speed of the engine can be stabilized.
According to an embodiment of the present invention, there is provided a method of controlling an opening degree of a throttle valve of an engine of an automobile, including: determining an opening degree adjusting period based on a difference value between the current engine rotating speed and the target rotating speed; determining the amplitude of the opening of the throttle valve based on the difference between the current engine speed and the target speed when the opening adjustment period is met; performing an opening adjustment based on a magnitude of the opening.
According to a further embodiment of the invention, the method further comprises: the opening degree zero point is determined before the opening degree adjustment is performed.
According to a further embodiment of the present invention, the step of determining the opening degree adjustment period further comprises: acquiring the current engine speed; determining a difference value between the current engine speed and a target speed; and determining the corresponding opening degree adjusting period of the rotation speed difference value.
According to a further embodiment of the invention, the step of determining the corresponding opening degree adjustment period is further configured to: and if the current rotating speed is greater than or equal to the target rotating speed, shortening the opening degree adjusting period.
According to a further embodiment of the invention, the step of performing an opening adjustment is further configured to: if the amplitude of the opening degree is smaller than a first threshold value, or if the amplitude of the opening degree is larger than and/or equal to the first threshold value, and the amplitude increase value of the opening degree at the previous time is smaller than a second threshold value, or if the amplitude of the opening degree is larger than and/or equal to the first threshold value, and the amplitude increase value of the opening degree at the previous time is smaller than half or a specific proportion of the amplitude increase value of the opening degree at the previous time, then carrying out opening degree adjustment of the amplitude of the opening degree; otherwise, the opening degree adjustment is abandoned.
According to a further embodiment of the invention, the step of performing an opening adjustment is further configured to: if the current rotating speed is less than the difference between the idle speed and the preset value, executing opening degree adjustment; and further performing a half-opening adjustment if the latest current rotation speed is greater than the sum of the idle speed and the predetermined value.
According to another embodiment of the present invention, there is also provided an apparatus for controlling an opening degree of a throttle valve of an engine of an automobile. The device comprises: opening degree adjustment period determination means for determining an opening degree adjustment period based on a difference between the current engine rotational speed and the target rotational speed; opening degree amplitude determination means for determining an amplitude of the opening degree of the throttle valve based on a difference between the current engine speed and the target speed when the opening degree adjustment period is satisfied; and an opening degree adjustment execution means for executing opening degree adjustment based on the magnitude of the opening degree.
According to a further embodiment of the present invention, the opening degree adjustment period determination means is further configured to: acquiring the current engine speed; determining a difference value between the current engine speed and a target speed; and determining the corresponding opening degree adjusting period of the rotation speed difference value.
According to a further embodiment of the present invention, the opening degree adjustment period determination means is further configured to: and if the current rotating speed is greater than or equal to the target rotating speed, shortening the opening degree adjusting period.
According to a further embodiment of the present invention, the opening degree adjustment performing means is further configured to: if the amplitude of the opening degree is smaller than a first threshold value, the amplitude of the opening degree is increased; if the amplitude of the opening degree is larger than and/or equal to a first threshold value, and the amplitude increase value of the opening degree in the previous time is smaller than a second threshold value, the amplitude of the opening degree is increased; if the amplitude of the opening degree is larger than and/or equal to a first threshold value, and the amplitude increase value of the previous opening degree is smaller than half or a specific proportion of the amplitude increase value of the previous opening degree, the amplitude of the opening degree is increased; otherwise, the amplitude of the opening degree is maintained.
According to a further embodiment of the present invention, the opening degree adjustment performing means is further configured to: if the current rotating speed is less than the difference between the idle speed and the preset value, executing opening degree adjustment; and further performing a half-opening adjustment if the latest current rotation speed is greater than the sum of the idle speed and the predetermined value.
According to further embodiments of the present invention, there is also provided a hybrid vehicle that may include the engine throttle opening adjusting apparatus as described above.
Drawings
FIG. 1 is a flowchart of a method of controlling opening of a throttle valve of an automotive engine according to an embodiment of the present invention;
FIG. 2 is a graph of a rotational speed differential versus an opening adjustment period according to an embodiment of the present invention;
FIG. 3 is a graph of rotational speed difference versus opening adjustment magnitude according to an embodiment of the present invention;
FIG. 4 is a graph of the relationship between the difference in rotational speed and the coefficient of the opening adjustment period according to an embodiment of the present invention;
FIG. 5 is a flowchart of a method of controlling opening of a throttle valve of an automotive engine according to another embodiment of the present invention;
FIG. 6 is a work flow diagram of an implementation of an adjustment of an idle speed according to an additional embodiment of the present invention;
fig. 7 is a block diagram of an apparatus for controlling an opening degree of a throttle valve of an engine of an automobile according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention.
The same or similar numbered elements/components used in the drawings and the embodiments are used to represent the same or similar parts. And the drawings are merely schematic, the elements of which are not necessarily to scale.
Fig. 1 is a flowchart of a method of controlling an opening of a throttle valve of an engine of an automobile according to an embodiment of the present invention. As shown in fig. 1, the method begins at step 110. In an embodiment of the invention, the method may be initiated by selecting the carburetor function and opening the fuel needle.
Next, in step 120, an opening degree adjustment period is determined based on the difference between the current engine speed and the target speed.
According to an embodiment of the present invention, the step of determining the opening degree adjustment period further includes: acquiring the current engine speed; determining a difference value between the current engine speed and a target speed; and determining the corresponding opening degree adjusting period of the rotation speed difference value.
According to an embodiment of the invention, the step of determining the corresponding opening degree adjustment period is further configured to: and if the current rotating speed is greater than or equal to the target rotating speed, shortening the opening degree adjusting period.
In an embodiment of the present invention, the opening degree adjustment period may be determined as follows:
adjTime＝(1200-rpmCha)/adjTimeJiShu (1)
wherein, adjTime is the opening degree regulation period (unit: millisecond); 1200 is the selected standard rotating speed value (unit: revolution), which can be selected according to the actual situation; rpmCy (unit: revolution): representing the difference value between the current target rotating speed and the actual rotating speed; and adjTimeJiShu is the opening adjustment period calculation time base and can be selected according to actual conditions.
For example, when rpmCha is 1000 revolutions and adjTimeJiShu is 22, the opening adjustment period adjTime may be 9 milliseconds.
In the embodiment of the present invention, during the period from 0 to the target speed, the maximum following speed and the minimum following speed concerned are closely related to the difference between the rotating speeds, for example, a target rotating speed of 3000RPM is required, and the rotating speed following is completed within 0.6 second, so that the opening degree adjusting period and the rotating speed difference are required to be 1000RPM to 0.21 s.
For example, if the slowest opening degree adjustment period close to the target rotation speed is 500ms, and the fastest opening degree adjustment period close to the target rotation speed is 200ms, as shown in fig. 2, after a large amount of data is collected, and the rotation speed difference is 100, the actual current rotation speed is already close to the target rotation speed, so the adjustment period needs to be slowed down by 500ms, and when the rotation speed difference is, for example, 1000, the required opening degree adjustment period is small, for example, 200ms, so as to adjust the opening degree as soon as possible to approach the target rotation speed. In the embodiment of the present invention, the value of the rotational speed difference between 100 and 1000 may determine the adjustment period according to the relationship shown in fig. 2, the slope of which should be the reciprocal of the opening degree adjustment period calculation time base, and the values of 100 and 1000 may be set in advance according to actual needs, for example.
In the embodiment of the present invention, a database may be used to store a corresponding relationship between a difference between an actual rotation speed and a target rotation speed and an opening degree adjustment period, so that the corresponding opening degree adjustment period may be determined according to a specific difference.
In an embodiment of the present invention, as shown in table 1, the opening degree adjustment period may also be determined by collecting a large amount of data.
For example,
TABLE 1
Obviously, a relation graph of the difference between the actual rotating speed and the target rotating speed and the opening degree adjustment period can be made according to a large amount of data, and then the corresponding opening degree adjustment period can be determined according to the difference between the actual rotating speed and the target rotating speed.
Next, in step 130, a magnitude of the opening of the throttle valve is determined based on a difference between the current engine speed and the target speed when the opening adjustment period is satisfied.
In an embodiment of the invention, the magnitude of the opening degree, which may also be referred to herein as an opening degree adjustment magnitude or opening degree value, may be determined as follows.
adjKaiDu＝(rpmCha*adjKaiDuJiShu/rpmChaJiShu) (2)
Wherein, adjKaiDu is the opening degree regulating amplitude or opening degree value (unit: percentage); rpmCy: the difference (unit: revolution) between the current target revolution and the actual revolution; the adjkaidjishu is the opening calculation base number and can be selected according to actual conditions; the rotating speed difference calculation base number of the rpmCHAJiShu can be selected according to actual conditions.
For example, if the total opening is 100 at maximum, as shown in fig. 3, if the opening adjustment period is 3 to 4 times based on the opening value of 30 to complete the total opening, and the rotation speed is increased to the maximum value, which depends on the rotation speed difference, if 6000RPM is set as the maximum rotation speed, the opening is increased by 30 each time, the rotation speed is increased by 2000, and 3 calculations are added up on the basis of 3 adjustment periods to reach the target rotation speed 6000. In the embodiment of the invention, the rotating speed difference value and the opening degree amplitude can be acquired and set according to the system requirement.
In the embodiment of the present invention, the value of the rotational speed difference smaller than 2000 may determine the opening degree adjustment amplitude or the opening degree value according to the relationship as shown in fig. 2, the slope of which should be a ratio of the opening degree calculation base number to the rotational speed difference calculation base number, and the value of, for example, 2000 may be previously set according to actual needs.
In the embodiment of the invention, the method can be applied to the condition that the relationship between the carburetor and the engine speed is established by an electronic control method.
In the embodiment of the present invention, for illustrating and clearly explaining the technical idea of the present invention, the above-mentioned figure shows only one specific relationship between the rotation speed difference and the specific physical quantity, and those skilled in the art can understand that other suitable mathematical relationships exist to represent the relationship between the rotation speed difference and the specific physical quantity, and are not described herein again.
In embodiments of the present invention, the opening value may also be determined by collecting a large amount of data.
As shown in table 2, obviously, a relationship diagram between the difference between the actual rotation speed and the target rotation speed and the opening degree adjustment amplitude or opening degree value can be made according to a large amount of data, and then the corresponding opening degree adjustment amplitude or opening degree value can be determined according to the difference between the actual rotation speed and the target rotation speed.
TABLE 2
Next, in step 140, the opening degree adjustment is performed. In the embodiment of the present invention, the opening degree adjustment is performed using the calculated magnitude of the opening degree in the case where the opening degree adjustment period is satisfied.
In an embodiment of the present invention, the process may end upon flame-out.
In the embodiment of the invention, the current rotation speed and the target rotation speed may be changed amounts, and therefore, in order to more accurately perform the execution of the flow, the rotation speed difference value may be fed back to the opening degree adjustment period determining step and the amplitude determining step of the opening degree.
In the embodiment of the present invention, in the case of using a low-cost stepping motor without a position sensor, since all the zero points of the opening degree calculation are based on the position at which the stepping motor rotates counterclockwise and cannot move any more, the zero points need to be corrected again when the opening degree is zero, so that the zero point of the opening degree is determined before the opening degree adjustment is performed.
In the embodiment of the present invention, the determination or correction of the opening degree zero point is not required when the stepping motor with the position sensor is used.
In the embodiment of the present invention, when the actual rotation speed or the current rotation speed reaches and exceeds the target rotation speed, the opening degree adjustment period may be dynamically processed using a method of dynamic calculation, so that it is possible to prevent the actual rotation speed from overshooting for stable control. For example, in an embodiment of the present invention, an opening degree adjustment period coefficient may be set to finely adjust the opening degree adjustment period calculated through step 120 (which may be referred to as dynamic opening degree period adjustment herein). As shown in fig. 4, when the difference between the current rotation speed and the target rotation speed is greater than or equal to 100, the deviation from the target rotation speed is large, and the dynamic opening degree period adjustment is performed. The rotation speed difference may be divided by the predetermined value 50 to obtain an integer value, and the opening degree adjustment period coefficient is 2 at this time, and similarly, the opening degree adjustment period coefficient is 2 at the rotation speed difference of 130. The opening degree adjustment period used at this time should be the calculated opening degree adjustment period/opening degree adjustment period coefficient, thereby shortening the opening degree adjustment period, accelerating the opening degree adjustment corresponding to the rotation speed, and stabilizing the rotation speed of the engine. In embodiments of the present invention, the predetermined value may be selected according to system requirements.
In the embodiment of the invention, the amplitude of the opening degree can be dynamically adjusted for the rotation speed following condition in the opening degree adjusting execution process. For example, in the case where the rotation speed following condition is good or fast, the stability can be maintained without performing the adjustment of the opening degree, thereby suppressing the overshoot.
In a further embodiment of the present invention, the step of performing an opening degree adjustment is further configured to: if the amplitude of the opening degree is smaller than a first threshold value, or if the amplitude of the opening degree is larger than and/or equal to the first threshold value, and the amplitude increase value of the opening degree at the previous time is smaller than a second threshold value, or if the amplitude of the opening degree is larger than and/or equal to the first threshold value, and the amplitude increase value of the opening degree at the previous time is smaller than half or a specific proportion of the amplitude increase value of the opening degree at the previous time, then carrying out opening degree adjustment of the amplitude of the opening degree; otherwise, the opening degree adjustment is abandoned.
Fig. 5 is a flowchart of a method of controlling an opening degree of a throttle valve of an engine of an automobile according to another embodiment of the present invention.
In an embodiment of the present invention, the magnitude of the opening of the throttle valve is determined based on the difference between the current engine speed and the target speed when the opening adjustment period is satisfied (step 130). As shown in fig. 5, in step 510, it is determined whether the magnitude of the opening degree calculated in step 130 satisfies an opening degree adjustment execution (i.e., opening degree increasing) condition. In an embodiment of the present invention, the condition may be: (1) the amplitude of the opening degree is smaller than a first threshold value; (2) the amplitude of the opening degree is greater than and/or equal to a first threshold value, and the amplitude of the previous opening degree is less than a second threshold value; or (3) the amplitude of the opening degree is greater than and/or equal to the first threshold value and the amplitude of the previous opening degree is less than and/or equal to half the amplitude of the previous opening degree or a certain proportion. If one of the above conditions is satisfied (yes at step 510), then an opening adjustment is performed at step 520 (e.g., step 140). Otherwise (no at step 510) execution of the present opening degree adjustment is abandoned at step 530, and the magnitude of the present opening degree is set to 0.
In the embodiment of the invention, the rotation speed following state is good after the opening degree adjustment is continuously performed for a plurality of times, the calculation of the amplitude of the opening degree adjustment can be completed almost instantly, and if the opening degree adjustment is performed, the opening degree overshoot is easily caused, so that the strategy is adopted, and when the amplitude of the opening degree does not meet the condition in a certain state, the adjustment of the opening degree can be temporarily performed, so that the rotation speed is stabilized.
In the embodiment of the present invention, special processing is also performed for the opening degree adjustment in a special condition such as idling.
In a further embodiment of the present invention, the step of performing an opening degree adjustment is further configured to: if the current rotating speed is less than the difference between the idle speed and the preset value, executing opening degree adjustment; and further performing a half-opening adjustment if the latest current rotation speed is greater than the sum of the idle speed and the predetermined value.
Fig. 6 is a work flow diagram of an implementation of the degree adjustment at idle conditions according to a further embodiment of the present invention. In an embodiment of the present invention, as shown in FIG. 6, at step 610, it is determined whether an idle state is present. In the embodiment of the invention, it may be executed to determine whether the target rotation speed is idle.
If not (no at step 610), then at step 620, amplitude adjustment of the normal opening is entered (e.g., step 140). If so (YES in step 610), then in step 630, it is determined whether the current speed is less than the difference between idle speed and the predetermined value. If so (630 yes), then in step 640, a half-opening execution flag may be set and opening adjustment may be performed. If not (630 no), then opening adjustment is performed in step 650.
Next, in step 660, it is determined whether the new current speed is greater than the sum of the idle speed and the predetermined value and the half-open flag is 1. If not (660 no), then opening adjustment is performed in step 670 (e.g., step 140). If yes (660 yes), then at step 680, a half-opening adjustment is performed.
In the embodiment of the present invention, in performing the half-opening adjustment, the magnitude of the opening thereof is half of the magnitude of the calculated opening, and thus is referred to as half-opening adjustment. Of course, it can be understood by those skilled in the art that in the half-opening adjustment process, the opening is a subdivision of the original opening adjustment, and therefore, the adjustment of the opening in any proportion falls within the technical idea of the present invention. In further embodiments of the invention, a further proportion of the magnitude of the opening may also be employed to refine the opening adjustment.
In an embodiment of the present invention, the flag reset may be performed for half opening when the idle state is disengaged.
In the embodiment of the invention, the above strategy is adopted, and the small opening degree adjustment can be executed when the idling speed is reduced from the high speed, so that the rotating speed can be stabilized.
Fig. 7 is a block diagram illustrating the configuration of an apparatus for controlling the opening degree of a throttle valve of an automobile engine according to an embodiment of the present invention. As shown in fig. 7, the apparatus 700 includes: opening degree adjustment period determination means 710 for determining an opening degree adjustment period based on a difference between the current engine speed and the target speed; opening degree amplitude determination means 720 for determining an amplitude of the opening degree of the throttle valve based on a difference between the current engine speed and the target speed when the opening degree adjustment period is satisfied; and an opening degree adjustment executing means 730 for executing opening degree adjustment based on the magnitude of the opening degree.
In an embodiment of the present invention, apparatus 700, and components 710, 720, and 730 thereof, may perform and may perform the functions of the method and/or steps described above with respect to fig. 1-6 for controlling throttle opening of an automotive engine. For the sake of clarity, the working principle is not described in detail here.
In an embodiment of the present invention, there is also provided a hybrid vehicle that may include the engine throttle opening adjusting apparatus 700 as described above.
The embodiments of the invention described above may be implemented in various hardware, software code and/or combinations of both. For example, an embodiment of the present invention may also be program code for executing the above method in a Digital Signal Processor (DSP). The invention may also relate to a variety of functions performed by a computer processor, digital signal processor, microprocessor, or Field Programmable Gate Array (FPGA). The processor described above may be configured according to the present invention to perform certain tasks by executing machine-readable software code or firmware code that defines certain methods disclosed herein. Software code or firmware code may be developed in different programming languages and in different formats or forms. Software code may also be compiled for different target platforms. However, the different code styles, types, and languages of software code and other types of configuration code that perform tasks in accordance with the present invention do not depart from the spirit and scope of the present invention.
The foregoing is merely an illustrative embodiment of the present invention, and any equivalent changes and modifications made by those skilled in the art without departing from the spirit and principle of the present invention should fall within the protection scope of the present invention.
Claims (10)
1. A method of controlling an opening of a throttle valve of an automotive engine, comprising:
determining an opening degree adjusting period based on a difference value between the current engine rotating speed and the target rotating speed;
determining the amplitude of the opening of the throttle valve based on the difference between the current engine speed and the target speed when the opening adjustment period is met;
performing an opening adjustment based on a magnitude of the opening;
the amplitude adjustment formula of the opening degree is as follows:
adjKaiDu＝(rpmCha*adjKaiDuJiShu/rpmChaJiShu)
wherein, adjKaiDu is the opening degree regulating amplitude or opening degree value; rpmCy: the difference between the current target rotating speed and the actual rotating speed; the adjkaidjishu is a base number for calculating the opening degree; rpmCHAJIShu is a rotation speed difference calculation base number;
the step of determining the opening degree adjustment period further includes:
acquiring the current engine speed;
determining a difference value between the current engine speed and a target speed;
determining a corresponding opening degree regulation period of a difference value between the current engine rotating speed and the target rotating speed;
the calculation formula of the opening degree regulation period is as follows:
adjTime＝(1200-rpmCha)/adjTimeJiShu
wherein, adjTime is the opening degree regulation period (unit: millisecond); 1200 is the selected standard rotational speed value (unit: revolution); rpmCy (unit: revolution): representing the difference value between the current target rotating speed and the actual rotating speed; and calculating a time base for the opening adjustment period by using adjTimeJeShu.
2. The method of claim 1, wherein the method further comprises:
the opening degree zero point is determined before the opening degree adjustment is performed.
3. The method of claim 1, wherein the step of determining an opening adjustment period is further configured to:
and if the current rotating speed is greater than or equal to the target rotating speed, shortening the opening degree adjusting period.
4. The method of claim 1, wherein the step of performing an opening adjustment is further configured to:
if the magnitude of the opening degree is less than a first threshold value, or
If the amplitude of the opening degree is greater than and/or equal to the first threshold value and the amplitude of the previous opening degree is increased by a value less than the second threshold value, or
If the amplitude of the opening degree is larger than and/or equal to the first threshold value, and the amplitude increase value of the previous opening degree is smaller than half of the amplitude increase value of the previous opening degree or a set proportion, executing opening degree adjustment of the amplitude of the opening degree;
otherwise, the current opening degree adjustment is abandoned.
5. The method of claim 1, wherein the step of performing an opening adjustment is further configured to:
if the current rotating speed is less than the difference between the idle speed and the preset value, executing opening degree adjustment; and
if the latest current rotation speed is larger than the sum of the idle speed and the preset value, the half-opening degree adjustment is further executed.
6. An opening degree adjusting device of an engine throttle valve of an automobile, characterized by comprising:
opening degree adjustment period determination means for determining an opening degree adjustment period based on a difference between the current engine rotational speed and the target rotational speed;
opening degree amplitude determination means for determining an amplitude of the opening degree of the throttle valve based on a difference between the current engine speed and the target speed when the opening degree adjustment period is satisfied;
opening degree adjustment execution means for executing opening degree adjustment based on the magnitude of the opening degree;
the amplitude adjustment formula of the opening degree is as follows:
adjKaiDu＝(rpmCha*adjKaiDuJiShu/rpmChaJiShu)
wherein, adjKaiDu is the opening degree regulating amplitude or opening degree value; rpmCy: the difference between the current target rotating speed and the actual rotating speed; the adjkaidjishu is a base number for calculating the opening degree; the opening adjustment period determination means is further configured to:
acquiring the current engine speed;
determining a difference value between the current engine speed and a target speed;
determining a corresponding opening degree regulation period of a difference value between the current engine rotating speed and the target rotating speed;
the calculation formula of the opening degree regulation period is as follows:
adjTime＝(1200-rpmCha)/adjTimeJiShu
wherein, adjTime is the opening degree regulation period (unit: millisecond); 1200 is the selected standard rotational speed value (unit: revolution); rpmCy (unit: revolution): representing the difference value between the current target rotating speed and the actual rotating speed; and calculating a time base for the opening adjustment period by using adjTimeJeShu.
7. The engine throttle opening degree adjusting device according to claim 6, characterized in that the opening degree adjustment cycle determining device is further configured to:
and if the current rotating speed is greater than or equal to the target rotating speed, shortening the opening degree adjusting period.
8. The engine throttle opening degree adjusting device according to claim 6, characterized in that the opening degree adjustment execution device is further configured to:
if the amplitude of the opening degree is smaller than a preset value, the amplitude of the opening degree is increased;
if the amplitude of the opening degree is larger than and/or equal to a preset value, and the amplitude increase value of the previous opening degree is smaller than half of the preset value or a set proportion, the amplitude of the opening degree is increased;
if the amplitude of the opening is larger than and/or equal to a preset value, and the amplitude increase value of the opening in the previous time is smaller than half of the amplitude increase value of the opening in the previous time or a set proportion, the amplitude of the opening is increased;
otherwise, the amplitude of the opening degree is maintained.
9. The engine throttle opening degree adjusting device according to claim 6, characterized in that the opening degree adjustment execution device is further configured to:
if the current rotating speed is less than the difference between the idle speed and the preset value, executing opening degree adjustment; and
if the latest current rotation speed is larger than the sum of the idle speed and the preset value, the half-opening degree adjustment is further executed.
10. A hybrid vehicle, characterized in that the hybrid vehicle includes the engine throttle opening degree adjusting device according to any one of claims 6 to 9.
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| CN114382598A (en) * | 2020-10-22 | 2022-04-22 | 浙江福爱电子有限公司 | Electronic air inlet adjusting device and system thereof |
| CN113027621B (en) * | 2021-03-31 | 2022-09-23 | 潍柴动力股份有限公司 | Engine speed control method and related device |
| CN114087077B (en) * | 2021-10-15 | 2024-08-27 | 湖南道依茨动力有限公司 | Throttle opening control method and device and working machine |
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| JP2005127277A (en) * | 2003-10-27 | 2005-05-19 | Nissan Diesel Motor Co Ltd | Control device for internal combustion engine |
| JP2007077888A (en) * | 2005-09-14 | 2007-03-29 | Kawasaki Heavy Ind Ltd | Engine control method and device for vehicle and motorcycle |
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