CN101440769A - Engine ignition control method - Google Patents
Engine ignition control method Download PDFInfo
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- CN101440769A CN101440769A CNA2008102400484A CN200810240048A CN101440769A CN 101440769 A CN101440769 A CN 101440769A CN A2008102400484 A CNA2008102400484 A CN A2008102400484A CN 200810240048 A CN200810240048 A CN 200810240048A CN 101440769 A CN101440769 A CN 101440769A
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Abstract
The invention relates to a method for controlling the ignition of an engine, which controls the ignition at compression stroke position or a position regarded as the compression stroke. According to the rotating speed or the change of rotated accelerating speed of the engine, the compression stroke is recognized. The invention also provides another method for controlling the ignition of the engine, which recognizes the compression stroke according to the rotating speed or the change of the rotated accelerating speed of the engine. The ignition of an igniter is controlled at the obtained compression stroke through recognition. The four-stroke engine ignites at the compression stroke and does work, and ignites at an exhaust stroke but does not do work; the ignition at the compression stroke plays a primary role in the acceleration performance, and produces difference to the variation of the rotating speed of the engine; while the exhaust stroke does not do work, the ignition does not play any role in the acceleration performance. The compression stroke is calculated, and the igniter or an igniting control executing unit is controlled to ignite at the compression stroke and not ignite at the exhaust stroke, thereby effectively realizing the multiplication of ignition energy, contributing to igniting more rarefied and mixed gas, and achieving the aim of saving energy and reducing emission.
Description
Technical field
The present invention relates to a kind of engine ignition control method.
Background technique
At the existing mini four-stroke motor of producing both at home and abroad, comprise single cylinder and twin-tub four stroke engine such as being used for motorcycle, gasoline engine generator, suction engine, lawnmower, four strokes in circulation are respectively aspirating stroke, compression stroke, expansion stroke, exhaust stroke.The motor of existing employing digital igniter control ignition, usually put fire twice in compression stroke and exhaust stroke respectively, wherein compression stroke is when piston is compressed to a very little space with burning mixture, igniter control spark plug produces the some spark, light burning mixture, thereby rapid expansion produces power output during by gaseous combustion, so the igniting of compression stroke is effective igniting; Exhaust stroke is waste gas to be discharged in the very little space of the only surplus next one when residual at piston, digital igniter control spark plug produces the some spark, because most of waste gas is discharged, and this moment, spark plug can not lighted residual fraction waste gas, just can not cause the gaseous combustion in the piston yet, therefore, the igniting in exhaust stroke is invalid igniting.
The igniting of mini four-stroke motor like this, before this has 50% ignition energy to be wasted.Because the mini four-stroke motor, comprise that single cylinder, twin-tub four stroke engine belong to high speed engine, also limited digital igniter and provide essential ignition energy for the motor of more speed.
Summary of the invention
The present invention has overcome above-mentioned shortcoming, provides a kind of and can avoid invalid igniting, realized the accurately engine ignition control method of igniting in compression stroke.
The present invention solves the technological scheme that its technical problem takes: a kind of engine ignition control method comprises the steps:
In compression stroke or regard the igniting of compression stroke place control point firearm as;
According to the variation of engine speed or rotation acceleration, the identification compression stroke.
Described identification compression stroke process is specially and comprises:
The acceleration of judging adjacent stroke increases when reducing, when forward stroke is identified as compression stroke earlier again; Otherwise, when the acceleration of judging adjacent stroke reduces earlier to increase again, when forward stroke is identified as non-compression stroke.
Described identification compression stroke process is specially and comprises:
Judge that separately the acceleration of stroke all is when reducing, when forward stroke is identified as compression stroke; Otherwise, judge when the acceleration of stroke all is increase separately, when forward stroke is identified as non-compression stroke.
Described identification compression stroke process is specially and comprises:
Judge that two adjacent stroke speeds after the igniting increase when afterwards reducing earlier, when forward stroke is a compression stroke; Otherwise, when two adjacent stroke speeds after the judgement igniting reduce earlier afterwards to increase, when forward stroke is non-compression stroke.
After the described identification compression stroke step, will work as forward stroke compression stroke mark or non-compression stroke mark will be set.
A kind of engine ignition control method comprises the steps:
According to the variation of engine speed or rotation acceleration, the identification compression stroke;
In the above-mentioned compression stroke control point firearm igniting that obtains discerning.
Four stroke engine of the present invention is done work in compression stroke igniting back, and does not do work in the exhaust stroke igniting; In the compression stroke igniting acceleration performance is played a major role; Therefore, the change in rotational speed amount of motor is distinguished to some extent.And the steam discharge stroke does not do work, and igniting cuts little ice to acceleration performance.Thereby calculating that stroke is compression stroke, and be controlled at compression stroke igniting and misfire in exhaust stroke by control point firearm or igniting performance element, thereby realized the ignition energy multiplication effectively, help lighting thinner mixed gas, reach the purpose of energy-saving and emission-reduction, help energy-conservation and environmental protection.In addition, the present invention is little to the structural modification of existing product, is convenient to transform on the basis of existing product.
Description of drawings
Fig. 1 is the control flow chart of the embodiment of the invention one;
Fig. 2 is the sense cycle pulse schematic representation of 5 continuous strokes;
Fig. 3 is the flow chart of first kind of compression stroke RM;
Fig. 4 is the flow chart of second kind of compression stroke RM;
Fig. 5 is the flow chart of the third compression stroke RM;
Fig. 6 is the control flow chart of the embodiment of the invention two;
Fig. 7 is the flow chart of the 4th kind of compression stroke RM.
Embodiment
At first, need to prove, existing igniter is put twice fire respectively at four continuous strokes, promptly respectively in compression stroke and exhaust stroke, the present invention is by judging the current compression stroke that whether is in, and indicates the compression stroke of having determined by mark, if recognize mark, then be in compression stroke, firearm igniting in control point is waited for the arrival of next compression stroke otherwise misfire.Below in conjunction with specific embodiment, content of the present invention is described in detail.
Embodiment one: as shown in fig. 1, the IGNITION CONTROL process is specially:
Step 101 detects light-off period, and calculates igniting pre-set time, this in the IGNITION CONTROL of existing digital igniter must be through step, the computational process that it is concrete repeats no more here.
Step 102 by the identification to mark, is confirmed compression stroke, if promptly recognize currently when being labeled as compression stroke, forwards step 103 to, lights a fire, and goes to step 104 otherwise skip 103.
Step 104 judges that whether compression stroke is determined, if determine, then changes step 107 over to, otherwise changes step 105 over to.
Step 105 is determined compression stroke.Success or not directly forwards 106 to.
Step 106 is judged the definite whether successful of compression stroke, if determine successfully to change over to step 107, if can not determine success, then changes step 101 over to.
Step 107 judges that last one changes whether the place stroke is compression stroke, if the current non-compression stroke that transfers to then is set, is labeled as non-compression stroke as step 108, otherwise promptly is labeled as compression stroke as step 109.Go to 101 then, wait for next commentaries on classics.
Present embodiment is when motor just starts, stroke with the ignition point place all is considered as compression stroke earlier, when triggering arrival, handle igniting according to existing firing mode earlier, still be that exhaust stroke is all lighted a fire promptly in current compression stroke, make in the process that motor can run well, and then handle compression stroke and confirm and switch operating.In addition, can also omit step 102, directly carry out ignition process, when starting, can run well to guarantee motor according to existing firing mode.
Wherein, in the described step 105 to the determining of compression stroke, can adopt following method:
As shown in Figure 2, get 5 continuous strokes, be respectively T1, T2, T3, T4, T5 as sense cycle, described sense cycle can obtain by the rotating speed of detection of engine, promptly get invention machine rotating speed in continuous 5 strokes respectively, utilize the function relation in rotating speed and cycle, promptly
Cycle=1/ rotating speed
Thereby obtain five sense cycle value T of continuous priority
5, T
4, T
3, T
2, T
1
Concrete deterministic process has following three kinds of modes.
First kind: as shown in Figure 3,, know the size of the rate variation between each commentaries on classics, promptly judge the acceleration of adjacent stroke, thereby determine which stroke is a compression stroke, be specially by the relatively variation of each sense cycle
A＝T
4-T
3
B＝T
3-T
2
C＝T
2-T
1
Step 303 is judged when B＜C, i.e. T
2-T
1Between acceleration greater than T
3-T
2Between acceleration, then change step 306 over to, otherwise change step 307 over to;
Step 304 when satisfying the Rule of judgment in step 301 and 302 at the same time, promptly satisfies B simultaneously〉A and B〉during C, T is described
3, T
1Be because non-compression stroke effect produces, promptly form T
1The stroke of triggering representative be compression stroke; Therefore, can determine that current commentaries on classics is in the compression stroke, is labeled as compression stroke with current commentaries on classics; Put to finish and confirm the compression stroke mark.
Second kind as shown in Figure 4.By more detected variation with bit period, know the size of the rate variation between each commentaries on classics, promptly judge the acceleration of stroke separately, thereby determine which stroke is a compression stroke, be specially
A＝T
5-T
4
B＝T
4-T
3
C＝T
3-T
2
D＝T
2-T
1
Step 402 is judged as D〉during C, i.e. T
3-T
2Between acceleration less than T
2-T
1Between acceleration, then change step 404 over to, otherwise change step 405 over to;
Step 403 is judged when D＜C, i.e. T
3-T
2Between acceleration greater than T
2-T
1Between acceleration, then change step 406 over to, otherwise change step 407 over to;
Step 405 can not satisfy 401 and 402 simultaneously, or step 407 is neither to satisfy 401 and when also not satisfying Rule of judgment in 403, can not confirm compression stroke, finish mark, then withdrawing from definite compression stroke process, for program provides outlet, i.e. the judgement of compression stroke fails.
The third adopts test method(s) as shown in Figure 5, and the current compression stroke that transfers to of experimental mark judges whether two adjacent stroke speeds after the igniting increase earlier, and whether further again calibration mark is correct, specific as follows:
Step 501 judges whether current ignition point has tried to be provided with mark, if also be not provided with, then changes step 502 over to, if tried to be provided with, then changes step 503 over to;
Step 502 is when current period is T2, if T
2T
3The time, T is described
2Be because non-compression stroke effect produces, promptly form T
2The stroke of triggering representative be compression stroke; This just can try to be provided with.Change step 504 over to, it is compression stroke that examination is provided with current triggering, and puts and try to be provided with sign; Try to be provided with otherwise be labeled as.
Step 503 is at next commentaries on classics that examination is provided with, T
1Be current period, as T
1＜T
2, T is described
1Be because the compression stroke effect produces, promptly form T
1The stroke of triggering representative be non-compression stroke; Representative is provided with success.Change step 505 over to, confirm that current triggering is non-compression stroke, and install and be set to the merit sign; Try to be provided with otherwise be labeled as.
The 4th kind is as shown in Figure 7, adopts direct compare cycle method, judges the magnitude relationship of adjacent periods, determines which is a compression stroke, and when engine idle, this method is also effective, and is specific as follows:
Step 701 is judged T2〉T3, if then change step 702 over to, if not then changing step 703 over to;
If step 702 is T2〉during T1, T1 be described owing to compression stroke effect generation, the stroke that promptly forms the triggering representative of T1 is a compression stroke; Change step 704 over to, put when forward stroke be non-compression stroke, and install and be set to the merit sign; Try to be provided with otherwise be labeled as.
Embodiment two:
As shown in Figure 6, the IGNITION CONTROL process is specially:
Step 601 detects light-off period, and calculates igniting pre-set time, this in the IGNITION CONTROL of existing digital igniter must be through step, the computational process that it is concrete repeats no more here.
Step 602 judges that whether compression stroke is determined, if determine, then changes step 604 over to, otherwise changes step 603 over to.
Step 603 is determined compression stroke.Success or not directly forwards 607 to.
Step 604 judges that last one changes whether the place stroke is compression stroke, if the current non-compression stroke that transfers to then is set, is labeled as non-compression stroke as step 605, otherwise promptly is labeled as compression stroke as step 606.
Step 607 by the identification to mark, is confirmed compression stroke, if promptly recognize currently when being labeled as compression stroke, forwards step 608 to, light a fire, otherwise step 601 is returned in redirect again, carries out next commentaries on classics.
More than engine ignition control method provided by the present invention is described in detail, used specific case herein principle of the present invention and mode of execution are set forth, above embodiment's explanation just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. an engine ignition control method is characterized in that: comprise the steps:
In compression stroke or regard the igniting of compression stroke place control point firearm as;
According to the variation of engine speed or rotation acceleration, the identification compression stroke.
2. engine ignition control method according to claim 1 is characterized in that: described identification compression stroke process is specially and comprises:
The acceleration of judging adjacent stroke increases when reducing, when forward stroke is identified as compression stroke earlier again; Otherwise, when the acceleration of judging adjacent stroke reduces earlier to increase again, when forward stroke is identified as non-compression stroke.
3. engine ignition control method according to claim 1 is characterized in that: described identification compression stroke process is specially and comprises:
Judge that separately the acceleration of stroke all is when reducing, when forward stroke is identified as compression stroke; Otherwise, judge when the acceleration of stroke all is increase separately, when forward stroke is identified as non-compression stroke.
4. engine ignition control method according to claim 1 is characterized in that: described identification compression stroke process is specially and comprises:
Judge that two adjacent stroke speeds after the igniting increase when afterwards reducing earlier, when forward stroke is a compression stroke; Otherwise, when two adjacent stroke speeds after the judgement igniting reduce earlier afterwards to increase, when forward stroke is non-compression stroke.
5. according to each described engine ignition control method in the claim 1～4, it is characterized in that: after the described identification compression stroke step, also comprise and when forward stroke the compression stroke mark to be set.
6. an engine ignition control method is characterized in that: comprise the steps:
According to the variation of engine speed or rotation acceleration, the identification compression stroke;
In the above-mentioned compression stroke control point firearm igniting that obtains discerning.
7. engine ignition control method according to claim 6 is characterized in that: described identification compression stroke process is specially and comprises:
The acceleration of judging adjacent stroke increases when reducing, when forward stroke is identified as compression stroke earlier again; Otherwise, when the acceleration of judging adjacent stroke reduces earlier to increase again, when forward stroke is identified as non-compression stroke.
8. engine ignition control method according to claim 6 is characterized in that: described identification compression stroke process is specially and comprises:
Judge that separately the acceleration of stroke all is when reducing, when forward stroke is identified as compression stroke; Otherwise, judge when the acceleration of stroke all is increase separately, when forward stroke is identified as non-compression stroke.
9. engine ignition control method according to claim 6 is characterized in that: described identification compression stroke process is specially and comprises:
Judge that two adjacent stroke speeds after the igniting increase when afterwards reducing earlier, when forward stroke is a compression stroke; Otherwise, when two adjacent stroke speeds after the judgement igniting reduce earlier afterwards to increase, when forward stroke is non-compression stroke.
10. according to each described engine ignition control method in the claim 6～9, it is characterized in that: after the described identification compression stroke step, also comprise and when forward stroke the compression stroke mark to be set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102400484A CN101440769A (en) | 2008-12-17 | 2008-12-17 | Engine ignition control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102400484A CN101440769A (en) | 2008-12-17 | 2008-12-17 | Engine ignition control method |
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| Publication Number | Publication Date |
|---|---|
| CN101440769A true CN101440769A (en) | 2009-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008102400484A Pending CN101440769A (en) | 2008-12-17 | 2008-12-17 | Engine ignition control method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244299A (en) * | 2013-04-28 | 2013-08-14 | 绵阳新晨动力机械有限公司 | Cylinder identification method on basis of speed gradient incremental threshold value |
| CN104500250A (en) * | 2014-12-23 | 2015-04-08 | 苟仲武 | Four-stroke engine modification device and operating method |
| CN107201979A (en) * | 2016-12-26 | 2017-09-26 | 浙江亚特电器有限公司 | A kind of digital ignition control method of mini four-stroke engine |
| CN111720249A (en) * | 2019-03-19 | 2020-09-29 | 华益机电有限公司 | Phase judging method and phase judging device of electronic fuel injection system of universal small gasoline engine |
-
2008
- 2008-12-17 CN CNA2008102400484A patent/CN101440769A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244299A (en) * | 2013-04-28 | 2013-08-14 | 绵阳新晨动力机械有限公司 | Cylinder identification method on basis of speed gradient incremental threshold value |
| CN104500250A (en) * | 2014-12-23 | 2015-04-08 | 苟仲武 | Four-stroke engine modification device and operating method |
| CN107201979A (en) * | 2016-12-26 | 2017-09-26 | 浙江亚特电器有限公司 | A kind of digital ignition control method of mini four-stroke engine |
| CN111720249A (en) * | 2019-03-19 | 2020-09-29 | 华益机电有限公司 | Phase judging method and phase judging device of electronic fuel injection system of universal small gasoline engine |
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Application publication date: 20090527 |