CN102644516A - Starting method of single-cylinder four-stroke engine - Google Patents
Starting method of single-cylinder four-stroke engine Download PDFInfo
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- CN102644516A CN102644516A CN201110042881XA CN201110042881A CN102644516A CN 102644516 A CN102644516 A CN 102644516A CN 201110042881X A CN201110042881X A CN 201110042881XA CN 201110042881 A CN201110042881 A CN 201110042881A CN 102644516 A CN102644516 A CN 102644516A
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Abstract
The invention relates to a starting method of a single-cylinder four-stroke engine. A fluted disc arranged on a crank is detected by utilizing a position sensor and a fuel nozzle and a spark plug are controlled by an electronic control unit electrically connected with the position sensor; the fluted disc is provided with a reference tooth and a plurality of encode teeth; and the starting method comprises a primary jet ignition step, a secondary jet ignition step, a stroke judging step and a normal operating step. The fuel nozzle is controlled by the position of the reference tooth to respectively inject the fuel quantity according with the air-fuel ratio and half the fuel quantity according with the air-fuel ratio in the primary jet ignition step and the secondary jet ignition step, so that the electronic control unit can judge the stroke position of the single-cylinder four-stroke engine after passing through an explosive top dead center for twice and the starting time is effectively shortened to improve the startability and reduce the power consumption.
Description
[technical field]
The invention relates to a kind of startup method of four-journey engine, particularly about a kind of startup method of single cylinder four-journey engine.
[background technique]
Consult Fig. 1; The motion flow of the injection type engines 11 of general motorcycle; Be by an electronic control unit (Electronic Control Units; ECU) 12 controls, one injection apparatus 13 sprays into an amount of vaporific fuel oil in this injection type engines 11, and by this electronic control unit 12 controls one igniting device 14 mist of oil is lighted, and makes a piston 15 to-and-fro motion generation power.
This piston 15 is driving a flywheel 16 with most coding teeth 161 and an empty tooth 162 along with the constantly rotation between the action of air inlet, compression, blast, exhaust of this injection type engines 11; In order to stablize outputting power; Existing technology is utilized the coding tooth 161 and empty tooth 162 of a sensor 17 these flywheel 16 peripheries of detecting more, to obtain a ripple signal 18 as shown in Figure 2.This ripple signal 18 has the coding tooth signal 181 of most corresponding said coding teeth 161, and a pair of datum tooth signal 182 that should empty tooth 162.
Consult Fig. 1,2; This electronic control unit 13 is behind the datum tooth signal 182 of confirming this ripple signal 18; Can give and said coding tooth signal 181 numberings; To judge the time point of these injection apparatus 13 oil spouts and this ignition mechanism 14 igniting, produce corresponding injection signal 131 and Ignition signal 141 and then can be when this flywheel 16 whenever takes two turns, the action of accomplishing air inlet, compression, blast, exhaust is once to produce power.
Because this injection type engines 11 is after this flywheel 16 takes two turns (720 °), just can accomplish the action of air inlet, compression, blast, exhaust once to produce power; But can run into twice datum tooth signal 182 in the process; Therefore; When starting this injection type engines 11,, but and can't judge this injection type engines 11 is to be in which stroke of air inlet, compression, blast, exhaust though this electronic control unit 13 can be detected this datum tooth signal 182.
So when this injection type engines 11 is starting; Be control this injection apparatus 13 and oil spout and igniting be once when this flywheel 16 whenever turns around for this ignition mechanism 14; And this flywheel 16 this injection apparatus 13 that whenever turns around is to spray 1/2 of the required oil mass of this injection type engines 11; Make this injection type engines 11 after flywheel 16 whenever takes two turns, could obtain complete oil mass, to keep the suitable air fuel ratio (ratio of air and fuel oil) of this injection type engines 11.
Because after this injection type engines 11 must be confirmed the datum tooth signal 182 of this ripple signal 18 earlier; Give said coding tooth signal 181 numberings again; To judge the time point of these injection apparatus 13 oil spouts and 14 igniting of this ignition mechanism; Therefore, take place easily this injection apparatus 13 the first time end of injection time point (shown in dotted line among Fig. 2) be to drop on before this datum tooth signal 182 and not oil spout, and then the situation that causes this ignition mechanism 14 can't light in ignition time point.Moreover because this injection apparatus 13 only sprays 1/2 of the required oil mass of this injection type engines 11 when starting, so air fuel ratio is thin excessively, causes this ignition mechanism 14 when igniting, can't to light smoothly or be short of power easily.
Because this injection type engines 11 is after this flywheel 16 takes two turns, just can accomplish the action of air inlet, compression, blast, exhaust once to produce power; Therefore; No matter be not oil spout, can't light smoothly or be short of power; This ignition mechanism 14 all must after this flywheel 16 rotates two circles again, just have an opportunity to light again mixed gas of oil mass that this injection apparatus 13 sprays; The most as shown in Figure 2 in the 3rd time the blast upper dead center could start, not only startability bad (starting time is long) also can quicken to consume storage battery electric power.
[summary of the invention]
Therefore, the object of the invention is promptly in the startup method that the preferable single cylinder four-journey engine of a kind of startability is provided.
So; The startup method of single cylinder four-journey engine of the present invention utilizes location aware device detecting to be located at the fluted disc on the crank, and with electronic control unit controls one fuel nozzle and the spark plug that are electrically connected with this location aware device; This fluted disc has a datum tooth; And most coding teeth of these datum tooths relatively, this startup method comprises jet ignition step, jet ignition step, an one stroke determining step for the second time for the first time, and a normal operation step.
This, jet ignition step was to begin to eject the oil mass that meets air fuel ratio in this this fuel nozzle of datum tooth positioning control first time, and set this spark plug of coding tooth positioning control in one and light a fire.
This, jet ignition step was in this fluted disc rotates week age second time, controlled this fuel nozzle and began to spray 1/2 of the oil mass that meets air fuel ratio in this datum tooth position, and light a fire in this settings this spark plug of tooth positioning control of encoding.
The trip determining step is to utilize this electronic control unit to judge the stroke of this single cylinder four-journey engine; Should the normal operation step if this electronic control unit can judge that the stroke of this single cylinder four-journey engine then gets into, if can not then return back to this of jet ignition step second time.
This normal operation step is in this fluted disc rotates two time-of-weeks, controls this fuel nozzle and once ejects the oil mass that meets air fuel ratio, and control this spark plug and light a fire in the coding tooth position of setting.
The startup method of described single cylinder four-journey engine; Wherein, This fluted disc has the coding tooth of 23 teeth, and this datum tooth has been a tooth, and this first time the jet ignition step with this settings coding tooth position in the jet ignition step for the second time be with 90 °～120 ° at this datum tooth interval after the coding tooth.
The startup method of described single cylinder four-journey engine, wherein, this first time the jet ignition step with this settings coding tooth position in the jet ignition step for the second time be with 120 ° at this datum tooth interval after the coding tooth.
Beneficial effect of the present invention is to utilize this this fuel nozzle of datum tooth positioning control to eject the oil mass and 1/2 of the oil mass that meets air fuel ratio that meets air fuel ratio in the jet ignition step respectively the first time jet ignition step and the second time; Make this electronic control unit can judge the travel position of this single cylinder four-journey engine rapidly, effectively shorten starting time and reduce power consumption to improve startability.
[description of drawings]
Fig. 1 is a start flow chart, and the injection type engines start flow process of general motorcycle is described;
Fig. 2 is a time-histories figure, and the time dependent ripple signal of injection type engines of general motorcycle is described;
Fig. 3 is a flow chart, and the preferred embodiment of the startup method of single cylinder four-journey engine of the present invention is described;
Fig. 4 is a schematic representation, the structural design of being correlated with among aid illustration Fig. 3; And
Fig. 5 is a time-histories figure, and the state of the fuel injection signal that relative coding tooth sequence number changes in this preferred embodiment and the Ignition signal that magnetizes is described.
22 jet ignition steps for the first time
23 jet ignition steps for the second time
24 stroke determining steps
25 normal operation steps
31 location aware devices
32 cranks
33 fluted discs
331 datum tooths
332 coding teeth
34 electronic control units
341 Ignition signals that magnetize
342 Ignition signals that magnetize
35 fuel nozzles
36 spark plugs
[embodiment]
About aforementioned and other technology contents, characteristics and effect of the present invention, in the following detailed description that cooperates with reference to one of a graphic preferred embodiment, can clearly appear.
Consult Fig. 3 and Fig. 4, the preferred embodiment of the startup method of single cylinder four-journey engine of the present invention comprises jet ignition step 22, jet ignition step 23, an one stroke determining step 24 for the second time for the first time, and a normal operation step 25.And should the startup method be to utilize a location aware device 31 detectings to be located at the fluted disc 33 on the crank 32; And with the keying of the electronic control unit that is electrically connected with this location aware device 31 34 control one fuel nozzles 35 and a spark plug 36; This fluted disc 33 has a datum tooth 331, and the coding tooth 332 of relative this datum tooth 331 of 23 teeth.
In this preferred embodiment; Be that to utilize the electronic control unit 34 be electrically connected with this location aware device 31 to calculate as shown in Figure 5 to should datum tooth 331 and the continuous square wave 41 of said coding tooth 332; Wherein, The ripple that span is big is to represent this datum tooth 331 positions, and the little ripple of span is the said coding tooth of representative 332 positions.
Consult Fig. 3,4,5; This, jet ignition step 22 was when being positioned at these datum tooth 331 positions first time; This electronic control unit 34 is promptly exported a fuel and is sprayed signal 341 these fuel nozzles 35 of control and begin to eject the oil mass that meets air fuel ratio, and this electronic control unit 34 is exported Ignition signal 342 these spark plugs 36 of control that magnetize again and lighted a fire when one sets coding tooth 332 positions.This setting coding tooth 332 positions are and this datum tooth 331 coding tooth 332 after 90 °～120 ° at interval.Guarantee that by this this fuel nozzle 35 can spray the oil mass of closing air fuel ratio before this spark plug 36 is lighted a fire.
In this preferred embodiment is that this setting coding tooth 332 positions are and this datum tooth 331 coding tooth 332 after 120 ° at interval, and this electronic control unit 34 is that discharge time by this fuel nozzle 35 of control is to control the oil mass of this fuel nozzle 35.
And this, jet ignition step 23 was to rotate in (360 °) times in a week at this fluted disc 33 second time; The fuel of being exported by this electronic control unit 34 sprays signal 341 and Ignition signal 342 these fuel nozzles 35 of control that magnetize and begins to spray 1/2 of the oil mass that meets air fuel ratio in these datum tooth 331 positions, and lights a fire in this settings this spark plug 36 of tooth 332 positioning control of encoding.By this, not only can reduce the consumption of oil mass, can also guarantee this second time oil mass that jet ignition step 23 is sprayed can get in the stroke of air inlet next time.
The trip determining step 24 is to utilize this electronic control unit 34 to judge this single cylinder four-journey engine is in which stroke of air inlet, compression, blast, exhaust; Should normal operation step 25 if this electronic control unit 34 can judge that the stroke of this single cylinder four-journey engine then gets into, if can not then return back to this of jet ignition step 23 second time.This normal operation step 25 is to rotate in (720 °) time in two weeks at this fluted disc 33; The fuel of being exported by this electronic control unit 34 spray signal 341 and Ignition signal 342 these fuel nozzles 35 of control that magnetize eject meet air fuel ratio oil mass once; And control this spark plug 36 and light a fire in coding tooth 332 positions of setting, produce power output once.
Be that how this electronic control unit 34 judges this single cylinder four-journey engine is to be in arbitrary stroke, is the known techniques of affiliated art, will not add to give unnecessary details at this what this will specify.
If this datum tooth 331 in this jet ignition step 22 is in this air inlet before top dead center first time; When the Ignition signal 342 that magnetizes in this jet ignition step 22 starts these spark plugs 36 first time; Because this single cylinder four-journey engine is in intake stroke; And can't light the oil mass that sprayed smoothly therefore, to start engine.
But; So promptly represent this datum tooth 331 in this of jet ignition step 23 is in this blast before top dead center second time; Therefore; The oil mass that sprayed in the jet ignition step 23 this second time can be mixed compression with air inlet upper dead center time institute inhaled air and formed oil gas; So; When the Ignition signal 342 that magnetizes in this jet ignition step 23 starts these spark plugs 36 second time, just can put fuel vapor and start engine, and make electronic control unit 34 in the trip determining step 24 can judge promptly after through twice blast upper dead center that this single cylinder four-journey engine is that which stroke in air inlet, compression, blast, exhaust effectively shortens starting time to improve startability minimizing power consumption.
If this first time, this datum tooth 331 of jet ignition step 22 was in this blast before top dead center, owing to the oil mass that is sprayed not with air mixing, so the Ignition signal 342 that magnetizes in this jet ignition step 22 still can't be lighted the oil mass that is sprayed first time.
So promptly represent this datum tooth 331 in this of jet ignition step 23 is in this air inlet before top dead center second time; So when the Ignition signal 342 that magnetizes in this jet ignition step 23 starts these spark plugs 36 second time; Because this single cylinder four-journey engine is in intake stroke; Therefore; And can't light the oil mass that sprayed smoothly to start engine, still, when carrying out for the second time this during jet ignition step 23 second time; This moment, this datum tooth 331 was in this blast before top dead center; And the oil mass that is sprayed just can form the oil mass that meets required air fuel ratio with first oil mass that jet ignition step 23 for the second time sprayed of taking second place, so, when carrying out for the second time the magnetizing during Ignition signal 342 these spark plugs 36 of startup of this of jet ignition step 23 second time; Just can light the oil mass that meets air fuel ratio starting engine, and make electronic control unit 34 in the trip determining step 24 can judge promptly after through twice blast upper dead center that this single cylinder four-journey engine is that which stroke in air inlet, compression, blast, exhaust effectively shortens starting time to improve startability minimizing power consumption.
In sum; The startup method of single cylinder four-journey engine of the present invention be utilize these datum tooth 331 positions and control this fuel nozzle 35 in the first time jet ignition step 22 with for the second time eject the oil mass and 1/2 of the oil mass that meets air fuel ratio that meets air fuel ratio respectively in the jet ignition step 23; Make this electronic control unit 34 promptly judge that through twice blast this single cylinder four-journey engine is that which stroke in air inlet, compression, blast, exhaust effectively shortens starting time to improve startability minimizing power consumption, so can reach the present invention's purpose really after the upper dead center.
The above; Be merely the present invention's preferred embodiment; When the scope that can not limit the present invention's enforcement with this, promptly change and modification according to claim of the present invention and the simple equivalent done of invention description generally, all still belong in the scope that patent of the present invention contains.
Claims (3)
1. the startup method of a single cylinder four-journey engine; Utilize location aware device detecting to be located at the fluted disc on the crank; And with electronic control unit controls one fuel nozzle and the spark plug that are electrically connected with this location aware device; This fluted disc has a datum tooth, and most coding tooth of this datum tooth relatively, and it is characterized in that: this startup method comprises:
One jet ignition step for the first time begins to eject the oil mass that meets air fuel ratio in this this fuel nozzle of datum tooth positioning control, and sets this spark plug of coding tooth positioning control in one and light a fire;
One jet ignition step for the second time in this fluted disc rotates week age, is controlled this fuel nozzle and is begun to spray 1/2 of the oil mass that meets air fuel ratio in this datum tooth position, and lights a fire in this settings this spark plug of tooth positioning control of encoding; And
The one stroke determining step; Utilize this electronic control unit to judge the stroke of this single cylinder four-journey engine; If this electronic control unit can judge that the stroke of this single cylinder four-journey engine then gets into a normal operation step, if can not then return back to this of jet ignition step, this normal operation step is in this fluted disc rotates two time-of-weeks second time; Control this fuel nozzle and once eject the oil mass that meets air fuel ratio, and control this spark plug and light a fire in the coding tooth position of setting.
2. the startup method of single cylinder four-journey engine as claimed in claim 1; Wherein, This fluted disc has the coding tooth of 23 teeth; And this datum tooth has been a tooth, and this first time the jet ignition step with this settings coding tooth position in the jet ignition step for the second time be with 90 °～120 ° at this datum tooth interval after the coding tooth.
3. the startup method of single cylinder four-journey engine as claimed in claim 1, wherein, this first time the jet ignition step with this settings coding tooth position in the jet ignition step for the second time be with 120 ° at this datum tooth interval after the coding tooth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110042881.XA CN102644516B (en) | 2011-02-18 | 2011-02-18 | The starting method of single-cylinder four-stroke engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110042881.XA CN102644516B (en) | 2011-02-18 | 2011-02-18 | The starting method of single-cylinder four-stroke engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102644516A true CN102644516A (en) | 2012-08-22 |
| CN102644516B CN102644516B (en) | 2016-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110042881.XA Active CN102644516B (en) | 2011-02-18 | 2011-02-18 | The starting method of single-cylinder four-stroke engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109578139A (en) * | 2017-09-28 | 2019-04-05 | 光阳工业股份有限公司 | The phase determination method of multi-cylinder engine |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61277833A (en) * | 1985-05-31 | 1986-12-08 | Honda Motor Co Ltd | Fuel feed control immediately after start of internal-combustion engine |
| JPH07229437A (en) * | 1994-02-18 | 1995-08-29 | Nippondenso Co Ltd | Fuel injection control device of internal combustion engine |
| CN1266943A (en) * | 1999-03-15 | 2000-09-20 | 本田技研工业株式会社 | Fuel jet control device for single cylinder engine |
| CN101832191A (en) * | 2009-12-24 | 2010-09-15 | 联合汽车电子有限公司 | Spark ignition engine start-up pre-injection system |
-
2011
- 2011-02-18 CN CN201110042881.XA patent/CN102644516B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61277833A (en) * | 1985-05-31 | 1986-12-08 | Honda Motor Co Ltd | Fuel feed control immediately after start of internal-combustion engine |
| JPH07229437A (en) * | 1994-02-18 | 1995-08-29 | Nippondenso Co Ltd | Fuel injection control device of internal combustion engine |
| CN1266943A (en) * | 1999-03-15 | 2000-09-20 | 本田技研工业株式会社 | Fuel jet control device for single cylinder engine |
| CN101832191A (en) * | 2009-12-24 | 2010-09-15 | 联合汽车电子有限公司 | Spark ignition engine start-up pre-injection system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109578139A (en) * | 2017-09-28 | 2019-04-05 | 光阳工业股份有限公司 | The phase determination method of multi-cylinder engine |
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| CN102644516B (en) | 2016-04-27 |
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