CN102777274A - Transition control method of engine controller - Google Patents
Transition control method of engine controller Download PDFInfo
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- CN102777274A CN102777274A CN2011101246698A CN201110124669A CN102777274A CN 102777274 A CN102777274 A CN 102777274A CN 2011101246698 A CN2011101246698 A CN 2011101246698A CN 201110124669 A CN201110124669 A CN 201110124669A CN 102777274 A CN102777274 A CN 102777274A
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Abstract
The invention relates to the technical field of an electric control system of a vehicle, and particularly discloses a transition control method of an engine controller. The transition control method comprises the steps of: setting a control cycle to be more than or equal to any time within a triggering cycle of a trigger; setting a difference between a current value and an expected value of a parameter of a controller as a control regulating value within each control cycle; obtaining a tradition parameter value according to a product of the control regulating value and a preset transition coefficient; and obtaining a current value of the parameter within next control cycle according to the difference between the expected value of the parameter and the tradition parameter value. By adopting the transition control method of the engine controller, smooth changes of the parameter of the controller can be realized in a transitional process, changes of power output are smooth, and vibration can be reduced. In addition, when the transition control method is applied, the control cycle can be well calibrated, and the application scope of transition control of the controller can be improved effectively.
Description
Technical field
The present invention relates to the vehicle electrically controlling system technical field, particularly a kind of transition controlling method of controller.
Background technique
In recent years, the technology of vehicle electrically controlling system reaches its maturity, and particularly the research for electrical control system for engine is gradually improved, and makes autoist for the various performance index of motor and the smoothness of operation higher requirement arranged.For the various performance index that improve motor and the operating experience of autoist; In the automatical control system of motor; (Electronic Control Unit abbreviates as electronic control unit: ECU) can be according to various input signals, like parameters such as the speed of a motor vehicle, rotating speed, suction pressure, gas pedal percentages; Adopt the Different control method; So that the operating mode to motor is adjusted, order about the expectation of automobile to realize autoist, also to satisfy the requirement of smoothness, power character, Economy and emission performance simultaneously.
When motor carried out the operating mode switching, ECU can use the transition controlling method.The transition controlling method is when operating mode is switched, the rate of change of control different parameters.Getting into power enriching operating mode with automobile from efficient routine is that example describes.In the process that this operating mode is switched, air fuel ratio has very big change, if motor does not use the transition controlling method to control, can cause the strenuous vibration of motor, problems such as emission performance deterioration suddenly.If used the transition controlling method, just can effectively improve the problem that motor occurs in the operating mode handoff procedure.But when existing ECU controlled in application transition controlling method, existence is the shortcoming in optimization control cycle well, makes that the application area of this transition controlling method is narrow and small, and the experience sense of autoist is not high.
Summary of the invention
The technical problem that (one) will solve
The technical problem that the present invention will solve provides a kind of transition controlling method of engine controller; To solve the defective that exists of the prior art; Make that motor transition in the operating mode handoff procedure is smooth-going; Can not cause harmful effect, and can demarcate, improve the application area of controller transition control control cycle to the working condition of motor.
(2) technological scheme
In order to address the above problem, the present invention provides a kind of transition controlling method of engine controller, comprising:
Control cycle is set is random time more than or equal to the trigger cycle;
In each control cycle, with the currency of engine controller parameter and the difference between the expected value as the regulating and controlling value;
Product according between the transfer coefficient of said regulating and controlling value and setting in advance obtains the transition parameter value;
Expected value and the difference between the said transition parameter value according to said engine controller parameter obtain the currency of said engine controller parameter in next control cycle.
Further, the said trigger cycle is 5 milliseconds.
Further, the said transfer coefficient that is provided with in advance is greater than 0 and less than 1.
Further, but said control cycle is a calibrating parameters.
Further, the said engine controller parameter air fuel ratio that is motor.
(3) beneficial effect
The transition controlling method of engine controller provided by the invention can realize the smooth change of controller parameter in transient process, makes power output change steadily, reduces vibration.This method not only can be applied to the transition control of air fuel ratio, also can be used in the transition control in the processes such as idling, igniting, air inlet, is widely used, and has improved the stability of system.And can demarcate control cycle, improve the application area of controller transition control.
Description of drawings
Fig. 1 is the transition controlling method flow chart of embodiment of the invention engine controller;
Fig. 2 is the industry control schematic diagram of embodiment of the invention transition controlling method;
Fig. 3 is the inner FB(flow block) of transkit attenuation module decay among Fig. 2;
Fig. 4 is the internal process figure of submodule among Fig. 3;
Fig. 5 is the internal process figure of submodule among Fig. 4;
Fig. 6 is the simulation curve of transition parameter value D, and Control Parameter is 6.6, and control cycle is 200 milliseconds, and control coefrficient is 0.9;
Fig. 7 is the simulation curve of transition parameter value D, and Control Parameter is 6.6, and control cycle is 50 milliseconds, and control coefrficient is 0.9;
Fig. 8 is an embodiment of the invention air fuel ratio emulation curve of output; Initial value is 8, and control cycle is 50 milliseconds, and control coefrficient is 0.9;
The method that Fig. 9 provides for present embodiment is applied in the air fuel ratio change curve that collects through its special calibrating instrument in the Engine ECU.
Embodiment
Below in conjunction with accompanying drawing and embodiment, specific embodiments of the invention describes in further detail.Following examples are used to explain the present invention, but are not used for limiting scope of the present invention.
Fig. 1 is the transition controlling method flow chart of embodiment of the invention engine controller, and this transition controlling method comprises:
Step 101: control cycle is set is random time more than or equal to the trigger cycle.Wherein, the triggering cycle of trigger is 5 milliseconds, and control cycle is the arbitrary value more than or equal to 5 milliseconds.But control cycle is a calibrating parameters.
Step 102: in each control cycle, with the currency of engine controller parameter and the difference between the expected value as the regulating and controlling value.
Controller parameter in the present embodiment is applied to concrete electric-controlled parts by controller to be decided, and for example when controller was applied in the engine controller, this parameter then was the air fuel ratio of motor.
Step 103: the product according between the transfer coefficient of regulating and controlling value and setting in advance obtains the transition parameter value.
Wherein, the transfer coefficient that is provided with in advance is greater than 0 and less than 1, and concrete numerical value can be set according to technician's experience, perhaps sets according to the optimized parameter that obtains in the emulation experiment.
Step 104: expected value and the difference between the transition parameter value according to the engine controller parameter obtain the currency of engine controller parameter in next control cycle.
Controller transition controlling method provided by the invention is used extensive especially in automatical control system, for example is applied in the different automatical control system such as electrokinetic cell control, Electric Machine Control or car load control.Present embodiment is an example with the engine controller in the motor, and the transition controlling method that a certain concrete working procedure middle controller of binding engine is adopted is that example is carried out detailed explanation to the method that the embodiment of the invention provides.Wherein, the parameter of engine controller then is the air fuel ratio of motor.
The FB(flow block) that utilizes the transition controlling method that simulation software (like simulink, motohowk etc.) makes that Fig. 2, Fig. 3, Fig. 4, Fig. 5 provide for the embodiment of the invention.Wherein, Fig. 3 is the inner FB(flow block) of transition control module decay among Fig. 2; Fig. 4 is the internal process figure of submodule among Fig. 3; Fig. 5 is the internal process figure of attenuator module among Fig. 4.
As shown in Figure 2; The value (expected value of parameter) of air fuel ratio was assumed to be 14.6 when B represented the motor operation, and A representes the value (be the currency of parameter) of motor in the current time air fuel ratio; The initial value of A can be assumed to be 8 for the value of motor air fuel ratio when starting.If engine controller directly brings up to 14.6 with air fuel ratio from 8; The fuel injection quantity that calculates according to air fuel ratio and air inflow can subtract rare rapidly; Motor occurs probably being short of power and makes rotating speed descend seriously; Thereby cause the engine speed big ups and downs, stabilization time is elongated, even serious consequences such as flame-out occur.Therefore, engine controller need use the transition controlling method that present embodiment provides.
As shown in Figure 3, Motohawk Function Trigger is the Time Triggered device that controller carries, and wherein the triggering cycle is 5 milliseconds, promptly whenever at a distance from 5 milliseconds of triggerings once.
As shown in Figure 4, input control cycle Time obtains cycle-index divided by triggering cycle (5 milliseconds); The program that adds up when remainder is 0, triggers one time attenuation module through to the cycle-index complementation.So just realized every at a distance from 5 milliseconds, decay algorithm of attenuation module execution.
As shown in Figure 5; The main effect of 1/z module (being Postponement module, Unit Delay) is to keep, and the value that is about to import in this module kept once in this cycle; Next execution cycle output, this cycle is to be determined by the triggered time of last layer algorithm to attenuation module.
Concrete transition controlling method comprises:
1, control cycle can be provided with arbitrarily, and being 50 milliseconds with a control cycle is that example describes at present.In first control cycle:
The currency A of acquisition air fuel ratio and the difference between the expected value B are as regulating and controlling value C; Be Control Parameter regulated value C=14.6-8=6.6.
Obtain transition parameter value D according to the product between the transfer coefficient M (being assumed to be 0.9) of Control Parameter regulated value C and setting in advance; Be D=6.6 * 0.9=5.94.
Expected value B and the difference between the transition parameter value D according to air fuel ratio obtain the currency A of air fuel ratio in next control cycle.Be the currency A=14.6-5.94=8.66 of air fuel ratio in next control cycle.
2, in second control cycle (between 5 milliseconds～10 milliseconds after the control beginning):
Control Parameter regulated value C=14.6-8.66=5.94.
Transition parameter value D=5.94 * 0.9=5.346.
The currency of air fuel ratio in next control cycle:
A＝14.6-5.346＝9.254。
...?...
N, in N control cycle (between 5 (N-1) millisecond～5N millisecond after the control beginning):
The currency of Control Parameter regulated value C=14.6-air fuel ratio in N control cycle;
Transition parameter value D=control parameter value * 0.9;
The currency A=14-D of air fuel ratio in N+1 control cycle.
Can know from above-mentioned concrete transition controlling method; The every triggering of triggering cycle once, the transition parameter value diminishes once thereupon, the currency of air fuel ratio in next control cycle then increases once; Lengthening along with the cycle of triggering; Current air fuel ratio progressively tends to its expected value, and D levels off to 0 gradually along with the transition parameter value, and the currency of air fuel ratio carries out the transition to runtime value from the startup value gradually.Whole control process is steadily reliable, can at utmost reduce vibration, improves vehicle user's experience sense.
Fig. 6 is the simulation curve of transition parameter value D, and wherein air fuel ratio startup value is 8, and transfer coefficient is 0.9, and control cycle is 200 milliseconds.
Fig. 7 is the simulation curve of transition parameter value D, and wherein air fuel ratio startup value is 8, and transfer coefficient is 0.9, and control cycle is 50 milliseconds.The contrast of Fig. 6 and Fig. 7 is for outstanding damped cycle this characteristics to be set arbitrarily.
Fig. 8 is the simulation curve of air fuel ratio, and wherein air fuel ratio startup value is 8, and runtime value is 14.6, and transfer coefficient is 0.9, when control cycle is 50 milliseconds.
Fig. 9 is applied in the air fuel ratio change curve that collects through its special calibrating instrument in the Engine ECU for the method that present embodiment is provided, and wherein, control cycle is 10 milliseconds, and transfer coefficient is 0.98.
Can draw in conjunction with Fig. 6 to Fig. 9, the controller transition controlling method that present embodiment provides can realize the smooth change of ECU parameter in transient process, makes engine power output change steadily, reduces vibration.This method not only can be applied to the transition control of air fuel ratio, also can be used in the transition control in the processes such as idling, igniting, air inlet, is widely used, and has improved the stability of system.
Transition controlling method provided by the invention; Remedied the triggering control that can not realize control cycle in the existing technology; Make the control accuracy of this transition controlling method higher, use more flexibly, application area improves greatly; Logical calculated and uncomplicated simultaneously, the technician can be in addition flexible according to the user demand of reality.
Above mode of execution only is used to explain the present invention; And be not limitation of the present invention; The those of ordinary skill in relevant technologies field under the situation that does not break away from the spirit and scope of the present invention, can also be made various variations and modification; Therefore all technological schemes that are equal to also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (5)
1. the transition controlling method of an engine controller is characterized in that, comprises
Control cycle is set is random time more than or equal to the trigger cycle;
In each control cycle, with the currency of engine controller parameter and the difference between the expected value as the regulating and controlling value;
Product according between the transfer coefficient of said regulating and controlling value and setting in advance obtains the transition parameter value;
Expected value and the difference between the said transition parameter value according to said engine controller parameter obtain the currency of said engine controller parameter in next control cycle.
2. the transition controlling method of engine controller as claimed in claim 1 is characterized in that, the said trigger cycle is 5 milliseconds.
3. the transition controlling method of engine controller as claimed in claim 1 is characterized in that, the said transfer coefficient that is provided with in advance is greater than 0 and less than 1.
4. the transition controlling method of engine controller as claimed in claim 1 is characterized in that, but said control cycle is a calibrating parameters.
5. the transition controlling method of engine controller as claimed in claim 1 is characterized in that, said engine controller parameter is the air fuel ratio of motor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101246698A CN102777274A (en) | 2011-05-13 | 2011-05-13 | Transition control method of engine controller |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101246698A CN102777274A (en) | 2011-05-13 | 2011-05-13 | Transition control method of engine controller |
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| CN102777274A true CN102777274A (en) | 2012-11-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106152380A (en) * | 2014-10-13 | 2016-11-23 | Lg电子株式会社 | Chiller controller and the control method of chiller |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4852538A (en) * | 1985-10-29 | 1989-08-01 | Nissan Motor Co., Ltd. | Fuel injection control system for internal combustion engine |
| DE4040637A1 (en) * | 1990-12-19 | 1992-06-25 | Bosch Gmbh Robert | Electronic control system for IC engine - has sensors for determining load, rpm and temp., and determines basic fuel injection amount signal and transition compensation signal |
| JP2001082225A (en) * | 1999-09-10 | 2001-03-27 | Toyota Motor Corp | Control device for internal combustion engine |
| CN1529792A (en) * | 2001-07-20 | 2004-09-15 | 最佳动力技术有限合伙公司 | Engine fuel delivery management system |
| CN1712921A (en) * | 2004-06-21 | 2005-12-28 | 株式会社日立制作所 | Device and method for generating analog worsensing signals for sensor |
-
2011
- 2011-05-13 CN CN2011101246698A patent/CN102777274A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4852538A (en) * | 1985-10-29 | 1989-08-01 | Nissan Motor Co., Ltd. | Fuel injection control system for internal combustion engine |
| DE4040637A1 (en) * | 1990-12-19 | 1992-06-25 | Bosch Gmbh Robert | Electronic control system for IC engine - has sensors for determining load, rpm and temp., and determines basic fuel injection amount signal and transition compensation signal |
| JP2001082225A (en) * | 1999-09-10 | 2001-03-27 | Toyota Motor Corp | Control device for internal combustion engine |
| CN1529792A (en) * | 2001-07-20 | 2004-09-15 | 最佳动力技术有限合伙公司 | Engine fuel delivery management system |
| CN1712921A (en) * | 2004-06-21 | 2005-12-28 | 株式会社日立制作所 | Device and method for generating analog worsensing signals for sensor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106152380A (en) * | 2014-10-13 | 2016-11-23 | Lg电子株式会社 | Chiller controller and the control method of chiller |
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Application publication date: 20121114 |