CN105298712A - Gasoline engine knock control method - Google Patents
Gasoline engine knock control method Download PDFInfo
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- CN105298712A CN105298712A CN201510791257.8A CN201510791257A CN105298712A CN 105298712 A CN105298712 A CN 105298712A CN 201510791257 A CN201510791257 A CN 201510791257A CN 105298712 A CN105298712 A CN 105298712A
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- ignition angle
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000003044 adaptive effect Effects 0.000 claims description 19
- 238000010304 firing Methods 0.000 claims description 15
- 238000012937 correction Methods 0.000 claims description 7
- 239000000523 sample Substances 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 abstract description 6
- 238000013461 design Methods 0.000 abstract description 2
- 238000005457 optimization Methods 0.000 abstract description 2
- 230000005764 inhibitory process Effects 0.000 abstract 1
- 230000035939 shock Effects 0.000 abstract 1
- 230000002159 abnormal effect Effects 0.000 description 3
- 230000001629 suppression Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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Abstract
The invention discloses a gasoline engine knock control method. The control method comprises the rotating speed collecting step of collecting the rotating speed of the engine working condition, the opening collecting step of collecting the charging efficiency, the starting judging step of judging whether the starting condition of engine shock self-adaptation control, and the engine knock self-adaptation control execution step of obtaining the preset deferred ignition angle according to the current engine total working condition rotating speed and the charging efficiency and stacking the deferred ignition angle to the corresponding ignition angle output. On the basis of optimization of an ECU software control strategy, inhibition of combustion noise caused by air snatch of certain air cylinders on some extreme operation working conditions is achieved in the asymmetric intake manifold design mode.
Description
Technical field
The present invention relates to petrol engine control system field, particularly relate to the ignition advance angle control method of engine control system, being specially adapted to petrol engine because robbing the suppression of the class phenomenon of detonation of gas generation.
Background technique
The function of gas handling system be as far as possible mainly with and uniform as far as possible to each cylinder supply fresh air; in order to ensure the uniformity of each cylinder air inlet; intake manifold can be designed to symmetrical structure usually; but the restriction in engine arrangement space can be subject in some cases; and be designed to unilateral air intake structure; each cylinder air inlet will certainly be caused like this to occur difference, cause each cylinder air inlet uneven.Under the operation operating mode that some is extreme, occur individual cylinder phenomenon of " robbing gas ", cause that current to rob cylinder combustion abnormal, cylinder pressure sharply increases, and produces a kind of engine combustion noise of similar pinking.
Summary of the invention
Technical problem to be solved by this invention is the controlling method of the abnormal combustion noise suppression realizing the similar pinking that one avoids petrol engine to cause because of " robbing gas ".
To achieve these goals, the technical solution used in the present invention is: a kind of petrol engine class knock control method, and this controlling method comprises:
Gather the rotating speed acquisition step of engine operating condition rotating speed;
Gather the aperture acquisition step of charging efficiency;
Determine whether the startup determining step of the unlocking condition reaching engine knock self adaptive control;
Obtain according to present engine full working scope rotating speed and charging efficiency the ignition angle preset and postpone, and the engine knock self adaptive control that the corresponding firing angle that is added to by the ignition angle of postponement exports performs step.
Also comprise and detect the detecting step whether ECU, sensor exist fault;
If described detecting step detects to there is fault, do not perform determining step and perform step.
Ignition angle in described execution step is:
Engine speed is set to X continuum, charging efficiency is set to Y continuum;
The ignition angle for revising corresponding to each charging efficiency interval is equipped with for each engine speed interval.
Described ignition angle was made up of the rotating speed of correspondence and charging efficiency two dimension MAP correction value (Fig. 3, Fig. 4) endurance.
The unlocking condition of described determining step comprises two conditions that must simultaneously reach:
Be positioned at certain engine speed interval time and exceed default time rating;
Be provided with throttle opening high-low limit value for each engine speed interval, current throttle aperture is between the throttle opening high-low limit value in residing engine speed interval.
Described X the interval size of continuous print engine speed is identical, and described Y the interval size of continuous print charging efficiency is identical.
Petrol engine class knock control system comprises
Gather the speed probe of engine operating condition rotating speed;
Gather the position sensor for throttle body of charging efficiency;
Determine whether the unlocking condition reaching engine knock self adaptive control, obtain according to present engine full working scope rotating speed and charging efficiency the ignition angle preset and postpone simultaneously, and the ECU that the corresponding firing angle that is added to by the ignition angle of postponement exports.
Described ECU comprises:
For determining whether the judging unit reaching engine knock self adaptive control unlocking condition;
For obtaining according to present engine full working scope rotating speed and charging efficiency the processing unit preset and postpone ignition angle;
For performing the control signal output unit of engine knock self adaptive control
For storing the storage unit of ignition angle.
Described ECU also comprises: for the detection unit detecting ECU, whether sensor exists fault.
The present invention is the optimization based on ECU (ElectronicControlUnit) software controlling strategies, realizes under asymmetric gas inlet manifold design pattern, and some extremely operates the suppression of operating mode because of the individual cylinder combustion noise caused of " robbing gas ".
Accompanying drawing explanation
Below the content that width accompanying drawing every in specification of the present invention is expressed is briefly described:
Fig. 1 motor full working scope running speed area schematic;
Fig. 2 motor full working scope charging efficiency area schematic;
Fig. 3 correction degrees of ignition advance demarcates whole working condition property MAP;
Fig. 4 correction degrees of ignition advance endurance demarcates whole working condition property MAP;
Fig. 5 ECU current failure condition adjudgement flow chart;
Fig. 6 degrees of ignition advance correction value obtains flow chart;
Fig. 7 degrees of ignition advance correction value uses the duration to judge.
Embodiment
Petrol engine class knock control method of the present invention specifically refers to that the control of ignition advance angle of gasoline engine is selected.Relate generally to the switching controls of anxious aero mode down-firing advance angle, relate generally to and the judgement of anxious accelerating mode and the selection of corresponding operating mode down-firing advance angle are switched and the endurance, controlling method is according to motor full working scope rotating speed and charging efficiency (obtaining by gathering throttle opening) two characteristic parameters, and feature based region is carried out demarcation and determined to revise degrees of ignition advance MAP.
The parts that petrol engine class knock control system relates to comprise speed probe, position sensor for throttle body and ECU.Speed probe is for obtaining engine operating condition rotating speed, and acquisition tach signal is delivered to ECU, position sensor for throttle body is for obtaining valve opening information, and then acquisition charging efficiency, and charging efficiency is delivered to ECU, ECU, for determining whether the unlocking condition reaching engine knock self adaptive control, obtains according to present engine full working scope rotating speed and charging efficiency the ignition angle preset and postpone simultaneously, and the corresponding firing angle that is added to by the ignition angle of postponement exports.
ECU comprises: for determining whether the judging unit reaching engine knock self adaptive control unlocking condition; For obtaining according to present engine full working scope rotating speed and charging efficiency the processing unit preset and postpone ignition angle; For performing the control signal output unit of engine knock self adaptive control for storing the storage unit of ignition angle.For the detection unit detecting ECU, whether sensor exists fault.
As shown in Figure 5, before system works, ECU current failure condition adjudgement, self-diagnostic function mainly based on ECU judges corresponding each component function and rationality, confirm current relevant electric injection system fault-free, guarantee throttle position sensor and signals of rotational speed sensor rationally, be in normal working, thus confirm the signal workability of position sensor for throttle body signal and speed probe further.If now ECU diagnoses the sensor fault, then tackle this fault and process, otherwise ECU processes based on this unreasonable signal unification the degrees of ignition advance revised, avoid when breaking down, the carrying out of mistake is revised.
When after confirmation fault-free, the unlocking condition of control unit of engine ECU to engine knock self adaptive control judges, when meeting unlocking condition, carry out the judgement of engine knock self adaptive control based on engine operation condition, to table look-up (the form in such as Fig. 3,4, different according to vehicle, need default different form) obtain the needs ignition angle of postponing under current working, and exported to corresponding firing angle by this angular stack, thus show that final firing angle exports.Also just postpone strategy based on this kind of firing angle, weaken the firing pressure robbing cylinder to a certain extent, thus reduce further the noise that abnormal combustion brings.
Engine speed as Figure 1-4, is set to X continuum by the embodiment of above-mentioned form of tabling look-up, and charging efficiency is set to Y continuum; Fig. 1 motor full working scope running speed area schematic, for motor full working scope running speed Region dividing schematic diagram (maximum speed is for 6000rpm), motor full working scope rotating speed is divided into 12 grades, control band based on this signal as one of characteristic parameter, need give the determination of adaptive area.Shown in Fig. 2, for motor full working scope charging efficiency Region dividing schematic diagram (the highest charging efficiency is only for 100%/t), motor full working scope charging efficiency divides 11 grades, revise igniting angle adjustment region and based on this signal as one of characteristic parameter, the determination of adaptive area need be given.
The ignition angle for revising corresponding to each charging efficiency interval is equipped with for each engine speed interval.Tabled look-up for the ignition angle revised and obtained time value by table look-up obtaining value and the endurance MAP that is made up of it of the rotating speed of correspondence and charging efficiency and jointly form, the linear convergent rate revised can be guaranteed like this.
As shown in Figure 3, whole working condition property MAP (based on Fig. 1, Fig. 2 example) is demarcated for revising degrees of ignition advance, the division revising the calibration adjustment region of degrees of ignition advance gives the determination of final adaptive area based on rotating speed and load two characteristic parameters, amount to 132 regions: each control band determines final numerical value based on Experimental Calibration, in this form data be for revise the excessive generation of throttle opening variance ratio firing angle compensate.
Shown in Fig. 4, whole working condition property MAP (based on Fig. 1, Fig. 2 example) is demarcated for revising the degrees of ignition advance endurance, the division revising the calibration adjustment region of degrees of ignition advance gives the determination of final adaptive area based on rotating speed and charging efficiency two characteristic parameters, amount to 132 regions: each control band determines final numerical value based on Experimental Calibration, and in this form, data are the firing angle compensating approach value endurance of the excessive generation of throttle opening variance ratio.
The unlocking condition of determining step is only throttle opening variance ratio and compares acquisition with the rate of change value that demarcation is preset, and when actual change amplitude exceedes predefined value, function is opened.
Engine knock self-adaptation control method is concrete as shown in Figure 6, when the voltage signal getting throttle position sensor aperture processes, thus draws the variance ratio of throttle body position; The tach signal simultaneously read based on ECU, MAP tables look-up (form in such as Fig. 3,4), obtain the current ignition advance angle needing to postpone, and this is postponed angular stack in corresponding firing angle output, thus draw the output at the actual ignition angle that current working is final.
Consider the difference of operating mode, based on the endurance revising degrees of ignition advance use duration MAP demarcation, once the time terminates, this correction degrees of ignition advance cancels superposition, to meet power character and to drive smoothness requirement.As shown in Figure 7, ECU, based on current operating mode feature, needs the degrees of ignition advance endurance revised under table look-up (Fig. 4) obtains current working.Whether ECU automatic determination time arrives, if time is up, then automatic switchover firing angle control strategy, stops using this to revise the superposition of degrees of ignition advance, and wait for the appearance of applying working condition next time.
Claims (9)
1. a petrol engine class knock control method, is characterized in that, this controlling method comprises:
Gather the rotating speed acquisition step of engine operating condition rotating speed;
Gather the aperture acquisition step of charging efficiency;
Determine whether the startup determining step of the unlocking condition reaching engine knock self adaptive control;
Obtain according to present engine full working scope rotating speed and charging efficiency the ignition angle preset and postpone, and the engine knock self adaptive control that the corresponding firing angle that is added to by the ignition angle of postponement exports performs step.
2. petrol engine class knock control method according to claim 1, is characterized in that:
Also comprise and detect the detecting step whether ECU, sensor exist fault;
If described detecting step detects to there is fault, do not perform determining step and perform step.
3. petrol engine class knock control method according to claim 1 and 2, is characterized in that:
Ignition angle in described execution step is:
Engine speed is set to X continuum, charging efficiency is set to Y continuum;
The ignition angle for revising corresponding to each charging efficiency interval is equipped with for each engine speed interval.
4. petrol engine class knock control method according to claim 3, is characterized in that:
Described ignition angle continues the continuous time by the rotating speed of correspondence and charging efficiency two dimension MAP correction value and forms.
5. petrol engine class knock control method according to claim 4, is characterized in that:
The unlocking condition of described determining step comprises:
Throttle change rate is greater than the throttle change rate value of demarcating and presetting.
6. the petrol engine class knock control method according to claim 4 or 5, is characterized in that: described X the interval size of continuous print engine speed is identical, and described Y the interval size of continuous print charging efficiency is identical.
7. petrol engine class knock control system, is characterized in that: comprise
Gather the speed probe of engine operating condition rotating speed;
Gather the position sensor for throttle body of charging efficiency;
Determine whether the unlocking condition reaching engine knock self adaptive control, obtain according to present engine full working scope rotating speed and charging efficiency the ignition angle preset and postpone simultaneously, and the ECU that the corresponding firing angle that is added to by the ignition angle of postponement exports.
8. petrol engine class knock control system according to claim 7, it is characterized in that, described ECU comprises:
For determining whether the judging unit reaching engine knock self adaptive control unlocking condition;
For obtaining according to present engine full working scope rotating speed and charging efficiency the processing unit preset and postpone ignition angle;
For performing the control signal output unit of engine knock self adaptive control
For storing the storage unit of ignition angle.
9. petrol engine class knock control system according to claim 7, it is characterized in that, described ECU also comprises: for the detection unit detecting ECU, whether sensor exists fault.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510791257.8A CN105298712A (en) | 2015-11-17 | 2015-11-17 | Gasoline engine knock control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510791257.8A CN105298712A (en) | 2015-11-17 | 2015-11-17 | Gasoline engine knock control method |
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| CN105298712A true CN105298712A (en) | 2016-02-03 |
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| CN201510791257.8A Pending CN105298712A (en) | 2015-11-17 | 2015-11-17 | Gasoline engine knock control method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113027621A (en) * | 2021-03-31 | 2021-06-25 | 潍柴动力股份有限公司 | Engine speed control method and related device |
| CN113847156A (en) * | 2021-09-29 | 2021-12-28 | 奇瑞汽车股份有限公司 | Engine noise control method, engine noise control device and computer storage medium |
| CN114810457A (en) * | 2021-06-30 | 2022-07-29 | 长城汽车股份有限公司 | Ignition angle control method and device for engine with EGR system and vehicle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4357918A (en) * | 1979-07-31 | 1982-11-09 | Nissan Motor Co., Ltd. | Engine controlling device |
| JPS61265357A (en) * | 1985-05-20 | 1986-11-25 | Toyota Motor Corp | Suction controller for internal-combustion engine |
| CN101389515A (en) * | 2006-02-24 | 2009-03-18 | 丰田自动车株式会社 | Control apparatus and method for internal combustion engine |
| JP2011012551A (en) * | 2009-06-30 | 2011-01-20 | Hitachi Automotive Systems Ltd | Control device of internal combustion engine |
| CN102308081A (en) * | 2009-02-12 | 2012-01-04 | 本田技研工业株式会社 | Ignition timing controller of internal combustion engine |
-
2015
- 2015-11-17 CN CN201510791257.8A patent/CN105298712A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4357918A (en) * | 1979-07-31 | 1982-11-09 | Nissan Motor Co., Ltd. | Engine controlling device |
| JPS61265357A (en) * | 1985-05-20 | 1986-11-25 | Toyota Motor Corp | Suction controller for internal-combustion engine |
| CN101389515A (en) * | 2006-02-24 | 2009-03-18 | 丰田自动车株式会社 | Control apparatus and method for internal combustion engine |
| CN102308081A (en) * | 2009-02-12 | 2012-01-04 | 本田技研工业株式会社 | Ignition timing controller of internal combustion engine |
| JP2011012551A (en) * | 2009-06-30 | 2011-01-20 | Hitachi Automotive Systems Ltd | Control device of internal combustion engine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113027621A (en) * | 2021-03-31 | 2021-06-25 | 潍柴动力股份有限公司 | Engine speed control method and related device |
| CN114810457A (en) * | 2021-06-30 | 2022-07-29 | 长城汽车股份有限公司 | Ignition angle control method and device for engine with EGR system and vehicle |
| CN113847156A (en) * | 2021-09-29 | 2021-12-28 | 奇瑞汽车股份有限公司 | Engine noise control method, engine noise control device and computer storage medium |
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Application publication date: 20160203 |
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