CN101666281B - Anti-reversal method of fuel injecting engine - Google Patents
Anti-reversal method of fuel injecting engine Download PDFInfo
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- CN101666281B CN101666281B CN2008102127618A CN200810212761A CN101666281B CN 101666281 B CN101666281 B CN 101666281B CN 2008102127618 A CN2008102127618 A CN 2008102127618A CN 200810212761 A CN200810212761 A CN 200810212761A CN 101666281 B CN101666281 B CN 101666281B
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Abstract
The invention discloses an anti-reversal method of a fuel injecting engine, which comprises the following: a primary ignition decision step, an engine starting judgment step, a first anti-reversal decision step and a second anti-reversal decision step. The method is mainly characterized in that: whether an engine is started or not is judged first in the engine starting judgment step, so that whether to perform the first anti-reversal decision step or the second anti-reversal decision step can be determined correspondingly when the engine stops running (for example, the engine is repeatedly started when a vehicle is started or the engine suddenly stops running in the running of the vehicle) so as to jet fuel and prohibit ignition to prevent the engine from anti-reversal phenomenon under the condition that the flameout rotation speed is reduced. Thus, related parts of the engine are effectively protected.
Description
[technical field]
The invention relates to a kind of engine anti-reversal method, particularly about a kind of anti-reversal method of fuel injecting engine.
[background technique]
Consult Fig. 1, the flow process of injection type engines 11 starts of general vehicle, be to spray in this injection type engines 11 via an amount of fuel oil of an injection apparatus 15 controls by an electronic control unit 12, become a mist of oil shape, and send Ignition signal control one igniting device 13 by this electronic control unit 12 this mist of oil is lighted, make a piston 14 to-and-fro motion produce power, and make this injection type engines 11 starts, therefore the part technology is general by industry, so no longer add to give unnecessary details.
Cooperate and consult Fig. 2, this piston 14 has a flywheel 15, it is continuous rotation when the engine start state, and with burning, exhaust, suck, the step of compression repeats, and between compression and combustion step, exist upper dead center, in general, be before upper dead center, to light a fire, but when the slow-speed of revolution (just started or travel in idling), engine is just changeing the torsion deficiency, if because the energy that engine load is excessive or igniting is exploded greater than the up kinetic energy of this piston 14, all can make this flywheel 15 and to reverse above upper dead center, cause overrunning clutch or reduction gear phenomenon to occur damaging this moment again.
And in order to judge the just reverse situation of this flywheel 15, prior art is at these flywheel 15 peripheries several coding teeth 16 to be set, wherein, be provided with the different coding tooth 16 ' of length in a certain angular orientation of before top dead center, and aforementioned coding tooth 16,16 ' just can produce different signals when the controller 17 by the outside.As shown in Figure 2, revolve when turning around in just commentaries on classics mode at this flywheel 15, this controller 17 just can read the signal that this coding tooth 16 ' passes through once, constitute positive revolving die formula with this, if and phenomenon appears reversing suddenly in this flywheel 15 when the slow-speed of revolution, at this moment, this controller 17 just can read the reverse pattern of passing through with the positive diverse coding tooth 16 ' of revolving die formula at once, just can judge the flywheel 15 existing phenomenons that reverse in view of the above with the electronic control unit 12 that this controller 17 is of coupled connections mutually, and cut off the jet ignition signal thereupon, avoid lighting a fire and cause more serious reverse.
That is to say, prior art is essential will be after reversing the phenomenon generation, begin to cut off the jet ignition signal again, be not the generation that reverses phenomenon in order to prevention, when being difficult for starting vehicle especially at the beginning, or in driving when flame-out suddenly, all be to reverse phenomenon when being easy to generate, at this moment, it is often late to cut off the jet ignition signal again, and overrunning clutch or reduction gear still have because of engine and reverse the doubt that damages.Therefore, how to address the above problem, prevent that in advance engine from reversing, just become the direction that the relevant dealer institute of vehicle manufacturing industry desire is made great efforts research.
[summary of the invention]
Therefore, purpose of the present invention is promptly providing a kind of anti-reversal method of fuel injecting engine, can be at the state of cutting the engine and the corresponding means of taking fuel cut-off to cut off igniting, prevent from that engine from producing to reverse phenomenon.
So the anti-reversal method of fuel injecting engine of the present invention comprises an initial ignition deciding step, an engine start determining step, one first anti-reverse transdetermination and decides step, and step is decided in one second anti-reverse transdetermination.
At first in this initial ignition deciding step, start this engine earlier, and detect this engine speed, if rotating speed rises to an initial speed when above, promptly begin to carry out fuel and spray and light a fire; Then carry out this engine start determining step, judge whether this engine speed is maintained on a running speed after through the initial ignition deciding step, judge that promptly this engine is the startup status of fail if can't keep, judge that then this engine is for starting success status if can keep.
Start status of fail if then judge this engine again, promptly continue and carry out this first anti-reverse transdetermination and decide step, at this moment, when this engine speed descends up to one less than the first low speed value of this initial speed when following, promptly forbid carrying out fuel and spray and light a fire; And if judge that this engine is for starting success status, then continue and carry out this second anti-reverse transdetermination and decide step, at this moment, when this engine speed descends up to one greater than the second low speed value of this initial speed when following, promptly judge engine-operated failure and forbid carrying out fuel and spray and igniting.
Effect of the present invention is; along with judging the engine start success or not; just can be when the undesired flame-out situation of engine takes place; decision accordingly goes to carry out that step is decided in this first anti-reverse transdetermination or step is decided in the second anti-reverse transdetermination; fuel sprays and igniting is forbidden to carry out; make engine can under the situation that flame-out rotating speed reduces, not produce and reverse phenomenon, can effectively protect the correlation engine spare part whereby.
[description of drawings]
Fig. 1 is a start flow chart, and the injection type engines start flow process of general vehicle is described:
Fig. 2 is a schematic representation, and injection type engines shown in Figure 1 is described, wherein, and the structural design that the detecting flywheel is just reversing:
Fig. 3 is a flow chart, and the preferred embodiment of the anti-reversal method of fuel injecting engine of the present invention is described;
Fig. 4 is a start flow chart, illustrates in the first anti-reverse transdetermination to decide in the step, and the start relation between engine speed and the jet ignition, wherein, solid arrow is represented the normal injection igniting, and dotted arrow is then represented the injection prohibition igniting; And
Fig. 5 is a start flow chart, and is similar with Fig. 4, mainly decides in the step start relation between engine speed and the jet ignition in the second anti-reverse transdetermination in explanation.
The anti-reversal method of 2 fuel injecting engines
21 initial ignition deciding step
22 engine start determining steps
Step is decided in 23 first anti-reverse transdeterminations
Step is decided in 24 second anti-reverse transdeterminations
[embodiment]
About aforementioned and other technology contents, characteristics and effect of the present invention, in the following detailed description that cooperates with reference to a graphic preferred embodiment, can clearly present.
Consult Fig. 3, the preferred embodiment of the anti-reversal method 2 of fuel injecting engine of the present invention comprises an initial ignition deciding step 21, an engine start determining step 22, one first anti-reverse transdetermination and decides step 23, and step 24 is decided in one second anti-reverse transdetermination.
At first in this initial ignition deciding step 21, start this engine earlier, and detect this engine speed, and the design of this detecting rotating speed can be as shown in Figure 2, utilization is provided with coding tooth 16,16 ' flywheel 15, and controller 17, electronic control unit 12 arrange in pairs or groups mutually, calculate sometime in, the number of times that this coding tooth 16 ' passes through, so as to obtaining the rotating speed of this flywheel 15, this promptly represents the actual speed of this engine usually.
If rotating speed rises to an initial speed when above, promptly begin to carry out fuel and spray and light a fire; And so-called initial speed is the difference along with various engine exhaust amounts, also can be and then different, and the air displacement big engine of healing, its initial speed can be lower, on the contrary, and the air displacement little engine of healing, its initial speed can be than higher; If with the engine of same air displacement, also need according at that time engine temperature, the battery voltage before starting and setting; Wherein, engine temperature can be to be taken from engine cooling water temperature or engine body temperature, or Cylinder-Head Temperature.
Present embodiment is that the motorcycle with 700cc is an example, at general normal temperature (about 25 ℃) and the battery voltage before starting be about under the situation about 12.5V, employing 200rpm is an initial speed, rises to 200rpm when above at engine speed, promptly begins to carry out fuel and sprays and igniting.
The continuous Fig. 3 that consults, then carry out this engine start determining step 22, judge whether this engine speed is maintained on a running speed after through initial ignition deciding step 21, judge that promptly this engine is the startup status of fail if can't keep, judge that then this engine is for starting success status if can keep.And in the present embodiment, this running speed is a fixed value that adopts 1000rpm.
Start status of fail if then judge this engine again, just continue and carry out this first anti-reverse transdetermination and decide step 23, at this moment, when this engine produces flame-out phenomenon and makes engine speed decline (being to start motorcycle in the short time repeatedly), when following, promptly forbid carrying out fuel and spray and igniting less than the first low speed value of this initial speed up to one; Generally speaking, mainly be because of initial speed be not a fixed value, and the first low speed value is to follow initial speed and decide, so naturally, this first low speed value also is in a scope, and with the gap of initial speed if just need to drop to extremely low rotating speed greater than 70rpm, just can reach forbid carrying out fuel spray with igniting with the purpose avoiding engine to produce reversing (for example: if initial speed is 200rpm, meeting is just meeting prohibition of fuel injection and igniting below 130rpm, the probability that causes engine to reverse heightens), therefore, present embodiment is that gap with this initial speed and the first low speed value is set in the 70rpm.
On the other hand, when judging that if this engine starts success status, just continue and carry out this second anti-reverse transdetermination and decide step 24, at this moment, when this engine produces flame-out phenomenon and makes engine speed decline (flame-out suddenly in promptly driving), when following, promptly forbid carrying out fuel and spray and igniting greater than the second low speed value of this initial speed up to one; Generally speaking, mainly be because of initial speed be not a fixed value, and the second low speed value is to follow initial speed and decide, so naturally, this second low speed value also is in a scope, and during with the gap of initial speed if greater than 70rpm, forbid carrying out fuel spray with the rotating speed of igniting judge threshold just seem quite high (for example: if initial speed is 200rpm, can be more than 270rpm will prohibition of fuel injection and igniting, cause engine speed to judge engine-operated failure and prohibition of fuel injection and igniting easily once decline is arranged slightly, to make motorcycle flame-out often and cause to drive have some setbacks), therefore, present embodiment is that gap with this initial speed and the second low speed value is set in the 70rpm.
Consult Fig. 4, in detail, preferable state is: the gap of this initial speed and the first low speed value is 50rpm, for example when initial rotating speed is 200rpm, the first low speed value is 150rpm, running speed then is at 1000rpm, therefore, when motorcycle is difficult for starting, and when starting repeatedly at short notice, its engine speed all can be lower than 1000rpm, and still can start the engine between rotating speed 1000～150rpm, but during rotating speed when rotating speed reaches 150rpm below, will forbid carrying out fuel sprays and lights a fire, so that cut the engine, avoid when starting the engine repeatedly, producing suddenly the phenomenon that engine reverses.
Consult Fig. 5, the gap of this initial speed and the second low speed value also is 50rpm, the second low speed value then is 250rpm, therefore, when motorcycle was flame-out suddenly in driving, its engine speed all can begin to descend more than 1000rpm, and during the rotating speed below rotating speed reaches 250rpm, will forbid carrying out fuel and spray and igniting, so that cut the engine, the phenomenon of the flame-out suddenly institute's engine that produces reverse when starting again in avoiding driving.
In sum; the anti-reversal method 2 of fuel injecting engine of the present invention; along with judging the engine start success or not; just can be when the undesired flame-out situation of engine takes place; decision accordingly goes to carry out that step 23 is decided in this first anti-reverse transdetermination or step 24 is decided in the second anti-reverse transdetermination; fuel sprays and igniting is forbidden to carry out; make engine can under the situation that flame-out rotating speed reduces, not produce and reverse phenomenon; can effectively protect the correlation engine spare part whereby; and under flywheel 15 designs that do not change prior art; the problem that engine reverses can correspondingly be solved, so can reach purpose of the present invention really.
The above, it only is preferred embodiment of the present invention, when not limiting scope of the invention process with this, promptly the simple equivalent of being done according to the present patent application claim and invention description content generally changes and modifies, and all still belongs in the scope that patent of the present invention contains.
Claims (10)
1. the anti-reversal method of a fuel injecting engine comprises:
One initial ignition deciding step starts earlier this engine, and detects this engine speed, if rotating speed rises to an initial speed when above, promptly begins to carry out fuel and sprays and light a fire;
One engine start determining step, judge whether this engine speed is maintained on a running speed after through the initial ignition deciding step, judge that promptly this engine is the startup status of fail if can't keep, judge that then this engine is for starting success status if can keep;
Step is decided in one first anti-reverse transdetermination, and when judging this engine for starting status of fail, and this engine speed descends below first a low speed value less than this initial speed, promptly forbids carrying out fuel and sprays and igniting; And
Step is decided in one second anti-reverse transdetermination, and when judging this engine when starting success status, and this engine speed descends below second a low speed value greater than this initial speed, promptly forbids carrying out fuel and sprays and igniting.
2. the anti-reversal method of fuel injecting engine according to claim 1, it is characterized in that: this initial speed is to decide according to engine temperature.
3. as the anti-reversal method of fuel injecting engine as described in the claim 2, it is characterized in that: engine temperature is meant the temperature of engine cooling water.
4. the anti-reversal method of fuel injecting engine according to claim 1, it is characterized in that: this initial speed is to decide according to battery voltage.
5. as the anti-reversal method of fuel injecting engine as described in claim 2 or 4, it is characterized in that: this initial speed is 200rpm.
6. as the anti-reversal method of fuel injecting engine as described in the claim 5, it is characterized in that: this running speed is 1000rpm.
7. as the anti-reversal method of fuel injecting engine as described in the claim 5, it is characterized in that: the gap of this initial speed and the first low speed value is in the 70rpm.
8. as the anti-reversal method of fuel injecting engine as described in the claim 5, it is characterized in that: the gap of this initial speed and the first low speed value is 50rpm.
9. as the anti-reversal method of fuel injecting engine as described in the claim 6, it is characterized in that: the gap of this initial speed and the second low speed value is in the 70rpm.
10. as the anti-reversal method of fuel injecting engine as described in the claim 6, it is characterized in that: the gap of this initial speed and the second low speed value is 50rpm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102127618A CN101666281B (en) | 2008-09-04 | 2008-09-04 | Anti-reversal method of fuel injecting engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102127618A CN101666281B (en) | 2008-09-04 | 2008-09-04 | Anti-reversal method of fuel injecting engine |
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| CN101666281A CN101666281A (en) | 2010-03-10 |
| CN101666281B true CN101666281B (en) | 2011-04-27 |
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| CN2008102127618A Active CN101666281B (en) | 2008-09-04 | 2008-09-04 | Anti-reversal method of fuel injecting engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FR2995939B1 (en) | 2012-09-21 | 2018-11-16 | Continental Automotive France | METHOD FOR ESTIMATING THE REGIME OF AN ENGINE IN A PREDETERMINED POSITION |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4982717A (en) * | 1990-03-15 | 1991-01-08 | Mitsubishi Denki Kabushiki Kaisha | Ignition system for an engine with a reverse-rotation preventing function |
| CN1367315A (en) * | 2001-01-25 | 2002-09-04 | 本田技研工业株式会社 | Vehicular engine starting gear |
| CN1657768A (en) * | 2004-02-09 | 2005-08-24 | 株式会社萌力克 | Kickback preventing device for engine |
| CN1667253A (en) * | 2004-03-08 | 2005-09-14 | 本田技研工业株式会社 | Engine start control system |
| CN1796768A (en) * | 2004-12-27 | 2006-07-05 | 雅马哈发动机株式会社 | Igniter control device of engine and vehicle therewith |
-
2008
- 2008-09-04 CN CN2008102127618A patent/CN101666281B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4982717A (en) * | 1990-03-15 | 1991-01-08 | Mitsubishi Denki Kabushiki Kaisha | Ignition system for an engine with a reverse-rotation preventing function |
| CN1367315A (en) * | 2001-01-25 | 2002-09-04 | 本田技研工业株式会社 | Vehicular engine starting gear |
| CN1657768A (en) * | 2004-02-09 | 2005-08-24 | 株式会社萌力克 | Kickback preventing device for engine |
| CN1667253A (en) * | 2004-03-08 | 2005-09-14 | 本田技研工业株式会社 | Engine start control system |
| CN1796768A (en) * | 2004-12-27 | 2006-07-05 | 雅马哈发动机株式会社 | Igniter control device of engine and vehicle therewith |
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| CN101666281A (en) | 2010-03-10 |
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