CN103195636A - Adjustment method for angle of ignition advance of engine - Google Patents
Adjustment method for angle of ignition advance of engine Download PDFInfo
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- CN103195636A CN103195636A CN2013101032772A CN201310103277A CN103195636A CN 103195636 A CN103195636 A CN 103195636A CN 2013101032772 A CN2013101032772 A CN 2013101032772A CN 201310103277 A CN201310103277 A CN 201310103277A CN 103195636 A CN103195636 A CN 103195636A
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- 238000000034 method Methods 0.000 title claims abstract description 17
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 60
- 239000003502 gasoline Substances 0.000 claims abstract description 54
- 239000000446 fuel Substances 0.000 claims abstract description 31
- 239000011435 rock Substances 0.000 claims description 68
- 238000004364 calculation method Methods 0.000 claims description 6
- 238000004146 energy storage Methods 0.000 claims description 5
- 239000000523 sample Substances 0.000 claims description 4
- 238000005284 basis set Methods 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 abstract description 2
- 239000003345 natural gas Substances 0.000 abstract 2
- 230000003111 delayed effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 70
- 238000002485 combustion reaction Methods 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000005474 detonation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
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- 238000012827 research and development Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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- Output Control And Ontrol Of Special Type Engine (AREA)
- Electrical Control Of Ignition Timing (AREA)
Abstract
An adjustment method for an angle of ignition advance of a marsh gas (or natural gas)/gasoline dual purpose engine with an ECU (electronic control unit) comprises the steps of: (1) a setting step: setting the type of supply fuel to be the gasoline or the marsh gas (or the natural gas) with a methane content of respectively 50 percents, 60 percents or 70 percents in a setting unit of the ECU; (2) a distributing step of angles of starting ignition advance: under starting condition, respectively distributing different angles of starting ignition advance according to fuel type set in the set steps; (3) a searching step: during normal running, the ECU searches the best angle of ignition advance value in a data sheet stored in the RAM (Random Access Memory) according to the set fuel type and values of an intake air pressure sensor, an intake air temperature sensor and a speed sensor; and (4) a computing step: the ECU computes according to the following formula to obtain a delayed duration according to the data of angle of ignition advance acquired in the searching step.
Description
Technical field
The present invention relates to a kind of biogas (or rock gas)/gasoline dual-purpose motor, particularly adjust the method for the ignition advance angle of biogas (or rock gas)/gasoline dual-purpose motor, belong to engine art.
Background technique
Biogas (or rock gas) more and more is subject to people's attention as a kind of clean energy resource, and its biogas (or rock gas) motor of developing as the fuel of motor is loved by the people.But, having sufficient gasoline supply difference with petrol engine is, the supply of biogas (or rock gas) often is difficult to be guaranteed, when biogas (or rock gas) supply is not enough, people's expectation can adopt gasoline to act as a fuel, therefore, begin one's study gasoline, the dual-purpose motor of biogas (or rock gas) of people.At present a lot of experts and scholars and technician to petrol engine be adapted as biogas (or rock gas), the gasoline dual-purpose motor is explored.
Biogas is the mixture of multiple gases, generally contains methane 50～70%, and all the other are carbon dioxide and a spot of nitrogen, hydrogen and hydrogen sulfide etc., and its characteristic is similar to rock gas.But the content of methane is often and unstable in the biogas that biomass pool produces, and is subjected to the influence of weather condition comparatively serious, during such as the cloudy day in the biogas methane content the highest, reach about 70%, the composition of fine biogas is the poorest behind the rain, and wherein methane content only is about 50%, even less than 45%.In addition, the velocity of combustion of methane slow (being about 37.3cm/s) in the biogas, adding the carbon dioxide and the nitrogen that exist in the biogas has inhibitory action to burning, the velocity of combustion of biogas slower (being about 23cm/s).Biogas composition unstable and two slow characteristics of velocity of combustion have restricted research and development and the application of biogas, gasoline dual-purpose motor to a certain extent, and rock gas and biogas are similar.
CN201874701U discloses a kind of biogas, the gasoline dual-purpose motor, comprise body, connecting rod, gas distribution system, oil supply system, lubrication system and ignition system, between the air-strainer of gas distribution system and suction tude, the biogas air mixing device is housed, two orthogonal biogas pipes are housed on the air mixing chamber sidewall of tubulose at least, described biogas pipe is in the air inlet hole that is provided with into circle distribution near air mixing chamber 2-10mm place, the biogas pipe forward end seal of air mixing chamber, the gas that distributing on its tube wall portals, and each biogas manifold General Logistics Department is connected with the biogas switch.Because the velocity of combustion 23cm/s of biogas is slower than the velocity of combustion of gasoline, so need bigger ignition advance angle, this technology is when biogas and gasoline exchange, do not carry out the adjustment of ignition advance angle, when using biogas to act as a fuel like this, because firing angle is less, biogas can not fully burn, thereby produces the problem that engine power reduces, row's temperature is high.
CN102619666A discloses the controlling device of the ignition advance angle of a kind of biogas, gasoline dual-purpose motor, it has adopted the breakerless magneto ignition system, comprise flywheel, spark coil, outer rim at described flywheel is provided with the flywheel magnet steel, also comprise the ignition advance angle adjustment support that fixedly installs, described spark coil is arranged on described ignition advance angle and adjusts on the support, and described ignition advance angle is adjusted support can be also fixing to the corresponding position at current selection fuel along the circumferencial direction adjustment spark coil of flywheel outer rim.This advance angle controlling device cooperates the fixed ignition coil by curve bath with connection set, during refuelling, only connection set need be unclamped, and adjusts spark coil and fix the adjusting that both can realize ignition advance angle again behind the relevant position, and is easy and simple to handle.The disclosed biogas of this document, gasoline dual-purpose motor only, are regulated ignition advance angle during fuel in change, fix at the regulated quantity of the biogas ignition advance angle of heterogeneity, are difficult to regulate ignition advance angle respectively at different biogas.
In addition, all do not set the technology contents of electronic control unit (ECU) in the prior art for biogas (or rock gas), gasoline dual-purpose motor.ECU can realize continuous monitoring and control the function of normal working of engine work, and can realize the auto-optimization of engine operation.Adopt ECU technology control biogas (or rock gas), gasoline dual-purpose motor can significantly improve power character and the Economy of motor.
Summary of the invention
In order to solve above-mentioned technical problem, the technological scheme that this law adopts is: the method for the ignition advance angle of a kind of adjustment biogas (or rock gas)/gasoline dual-purpose motor, described biogas (or rock gas)/gasoline dual-purpose motor comprises gasoline feeding unit, biogas (or rock gas) feeding unit, cylinder body and ECU control unit, described ECU control unit overlaps independently by CPU, memory module, input interface circuit module, output interface circuit module, setup unit, display modular and two that the energy storage ignition module constitutes, and this method may further comprise the steps:
(1) set step, setting the supplied fuel classification in the setup unit of ECU is that gasoline or methane content are respectively 50%, 60% or 70% biogas (or rock gas);
(2) distribute starting ignition advance angle step, starting under the operating mode, according to the fuel classification of setting in the described setting step, for gasoline or methane content are respectively the starting ignition advance angle that 50%, 60%, 70% biogas (or rock gas) distributes 5 °, 24 °, 22 ° and 20 ° respectively;
(3) finding step, when running well, the numerical value of the fuel classification that the ECU basis sets and air inlet pressure sensor, intake air temperature sensor, speed probe is searched best ignition advance angle numerical value in the data sheet from be stored in described RAM,
Described data sheet comprises at gasoline and is respectively the ignition advance angle optimum data of 50%, 60% or 70% biogas (or rock gas);
(4) calculation procedure, ECU calculates delay duration according to the electronic spark advance angular data of obtaining in the described finding step according to following formula,
In the formula: Td-software delay duration, the μ s of unit;
θ-ignition advance angle;
The N-engine speed, the r/min of unit;
(5) send the fire signal step, ECU sends fire signal through after the time-delay corresponding to the delay duration that draws in the calculation procedure.
Biogas of the present invention (or rock gas)/gasoline dual-purpose motor, can adopt the mode of ECU ECU (Electrical Control Unit) software delay to realize that the adjusting of ignition advance angle, significant advantage are to select best ignition advance angle corresponding to the biogas (or rock gas) of different methane contents is autonomous.
Description of drawings
The ECU control system theory diagram of Fig. 1 biogas of the present invention (or rock gas)/gasoline dual-purpose motor;
Fig. 2 biogas of the present invention (or rock gas)/gasoline dual-purpose cylinder sectional view;
The power driving circuit figure of Fig. 3 high-energy ignition system;
Electronic spark advance angular data after the demarcation of Fig. 4 process and the optimization;
The software adjustment flow diagram of Fig. 5 biogas (or rock gas)/gasoline dual-purpose advance angle of engine ignition.
Embodiment
Describe performance of the present invention in detail below in conjunction with accompanying drawing, but they do not constitute limitation of the invention, only give an example.Simultaneously by illustrating that advantage of the present invention will become clear more and understanding easily.
Biogas of the present invention (or rock gas)/gasoline dual-purpose motor has cylinder block, gasoline feeding unit and biogas (or rock gas) feeding unit and ECU electronic control unit.As shown in Figure 1, the gasoline feeding unit comprises fuel tank, oil pump, transport pipe and sparger; Biogas (or rock gas) feeding unit comprises biogas (or rock gas) gas storage chamber, automatically controlled pressure governor, air filter, mixer, electronic throttle.
Engine electronic control unit ECU is the core of whole system, it is gathered and is installed in analogue signal or the digital signal that the sensor on biogas (or rock gas)/gasoline dual-purpose motor transmits, according to the control model in the software, export each signal to actuator after treatment.ECU is made of CPU, ROM, RAM, input interface circuit module, output interface circuit module, setup unit and display modular.The digital signal that air inlet pressure sensor 11, intake air temperature sensor 12, throttle position sensor 13, cooling-water temperature transmitter 14, speed probe 15, cam-position sensor 16, crankshaft position sensor 17, detonation sensor 18, lambda sensor 19, detection obtain or analogue signal are imported among the CPU by input interface circuit through the corresponding circuit of adjusting.After ECU collects the signal of each sensor transmission, output after treatment controls signal to biogas (or rock gas)/gasoline dual-purpose motor accordingly, such as fire signal, the automatically controlled pressure regulation signal of biogas (or rock gas), oil sprayer control signal etc., thus control motor proper functioning.
Setting module is used for setting fuel classification and initial parameters, such as setting the fuel classification is: 1# gasoline; The 2# methane content is 50% biogas (or rock gas); The 3# methane content is 60% biogas (or rock gas); The 4# methane content is 70% biogas (or rock gas).Setting module can also be set the numerical value corresponding to the startup operating mode down-firing advance angle of different fuel.
The present invention adopts the oxygen content in the equivalent lambda sensor 19 detection burning back waste gas, thereby whether the air fuel ratio that can detect mixed gas reality is consistent with default air fuel ratio.If inconsistent, automatically controlled pressure governor is then further revised the bid value that enters biogas (or rock gas) pressure in the mixer according to this monitor value, makes actual air fuel ratio consistent with desired value, the final closed loop control that realizes combustion gas.When the signal voltage of the lambda sensor 19 that receives as ECU is higher than threshold voltage, show the mixed gas concentration height, air fuel ratio is less than normal, and ECU will control the content reduction that automatically controlled pressure governor makes biogas in the mixed gas (or rock gas).
The cylinder head phantom of biogas as shown in Figure 2 (or rock gas)/gasoline dual-purpose engine cylinder, biogas of the present invention (or rock gas)/gasoline dual-purpose motor adopts two spark plug ignition systems, it comprise with ECU on two overlap the two cover high-energy ignition coils 21 that energy storage ignition module independently is connected, two spark plugs 22 and dual ignition plug cylinder head 23, described two spark plugs are arranged on the engine cylinder head with separating a determining deviation.Independently the energy storage ignition module can be that two capacitor discharge types also can be capacitor discharge type and inductive discharge formula, also can be two inductive discharge formulas.The mode of turn ratio that can be by changing high-energy ignition coil secondary winding and primary air or the mode that improves the spark coil primary voltage obtain higher ignition energy, and preferably the ignition energy of primary air is 120～160mJ.During engine running, ECU control two overlaps independently that the energy storage ignition module sends fire signal simultaneously, and then drives two spark plugs and light a fire simultaneously.This accomplishes something difficult and so deserve praise for biogas (or rock gas)/gasoline dual-purpose motor, because biogas (or rock gas) flame combustion speed is slow, produce fire nuclear simultaneously in the left and right sides of cylinder, can regulate flame travel, be beneficial to biogas (or rock gas) and burn fully rapidly, can improve power character and the emission performance of motor significantly.
Fig. 3 is ignition drive circuit figure, the fire signal that ECU sends arrives the base stage of triode through photoelectric coupled device, by cut-offfing of electric current in the switch control transformer primary air of the switch drive metal-oxide-semiconductor of triode, the high pressure that induces is added to the primary air of spark coil, makes the spark plug arcing after boosting again.Be high level during through non-triggerings of the fire signal of monostable flipflop, triode conducting at this moment, the metal-oxide-semiconductor base stage is low level, is in by state, and no current passes through in the primary air of isolating transformer, and secondary winding and spark coil all no current misfire; When the fire signal that receives a moment (low level), triode is by, metal-oxide-semiconductor conducting, and the energising of the primary air of isolating transformer jumps spark plug after the high pressure of secondary winding boosts again through spark coil.
The ignition advance angle control of biogas of the present invention (or rock gas)/gasoline dual-purpose motor adopts the mode of software delay to adjust, advance angle data sheet MAP is stored among the RAM of ECU, during engine operation, the data that based on fuel classification, operating mode and air inlet pressure sensor 11, temperature transducer 12 are gathered are determined ignition advance angle.When biogas (or rock gas)/gasoline dual-purpose motor adopted gasoline to act as a fuel, setting the fuel classification by the setup unit on the ECU was gasoline, and set point fire advance angle is 5 ° under the startup operating mode.During normal operation, ECU tables look-up by advance angle data sheet MAP according to engine speed, suction pressure and temperature and obtains ignition advance angle numerical value.ECU determines the spark delay amount according to selected ignition advance angle, sends fire signal behind the line delay of going forward side by side.When biogas (or rock gas)/gasoline dual-purpose motor adopts biogas (or rock gas) when acting as a fuel, by the setup unit on the ECU fuel classification is set at biogas (or rock gas), and sets the classification of biogas (or rock gas) component content according to the middle methane content of biogas (or rock gas) that carry in biogas (or rock gas) pond.The methane content that to import biogas (or rock gas) according to the measured value of methane content in the biogas (or rock gas) is set at 50% respectively, 60%, 70% third gear, ECU selects to determine respectively the starting ignition advance angle according to the methane content of the input that setup unit is selected, starting under the operating mode, setting ignition advance angle is that 20 ° (biogas of corresponding methane content 70% (or rock gases)) or setting ignition advance angle are 20+2 ° (biogas of corresponding methane content 60% (or rock gas)), or setting ignition advance angle is 20+4 ° (biogas of corresponding methane content 50% (or rock gas)).During normal operation, same ECU tables look-up by advance angle data sheet MAP according to engine speed, suction pressure and temperature and obtains ignition advance angle numerical value.ECU determines the spark delay amount according to selected ignition advance angle, sends fire signal behind the line delay of going forward side by side.
Detonation sensor 18 detects biogas (or rock gas)/gasoline dual-purpose motor and whether produces pinking, if detonation sensor 18 detects pinking, will send signal and be transported to ECU, and ECU can reduce ignition advance angle accordingly.
Following table is through calibrated biogas (or rock gas)/gasoline dual-purpose motor optimum igniting advance angle.
The ignition advance angle that Fig. 5 shows biogas of the present invention (or rock gas)/gasoline dual-purpose motor arranges block diagram, after system starts, the fuel classification of importing in the load module according to ECU, ignition advance angle start up period that ECU determining automatically, for example gasoline is 5 °, 24 ° of the biogas of methane content 50% (or rock gas), 22 ° of the biogas of methane content 60% (or rock gas), 20 ° of the biogas of methane content 70% (or rock gas).ECU sends fire signal after according to software delay.In the normal operation stage, find the ignition advance angle of corresponding fuel classification, rotating speed, suction pressure and temperature in the data sheet of ECU from be stored in RAM.ECU sends fire signal after according to software delay.
The duration of software delay calculates by following formula:
In the formula: Td-software delay duration, the μ s of unit;
θ-ignition advance angle;
The N-engine speed, the r/min of unit.
According to the ignition advance angle adjusting method of biogas of the present invention (or rock gas)/gasoline dual-purpose motor, implement according to following steps.May further comprise the steps:
(1) set step, setting the supplied fuel classification in the setup unit of ECU is that gasoline or methane content are respectively 50%, 60% or 70% biogas (or rock gas);
(2) distribute starting ignition advance angle step, starting under the operating mode, according to the fuel classification of setting in the described setting step, for gasoline or methane content are respectively the starting ignition advance angle that 50%, 60%, 70% biogas (or rock gas) distributes 5 °, 24 °, 22 ° and 20 ° respectively;
(3) finding step, when running well, the numerical value of the fuel classification that the ECU basis sets and air inlet pressure sensor, intake air temperature sensor, speed probe, search best ignition advance angle numerical value in the data sheet from be stored in described RAM, described data sheet comprises at gasoline and to be respectively 50%, 60% still be the ignition advance angle optimum data of 70% biogas;
(4) calculation procedure, ECU calculates delay duration according to the electronic spark advance angular data of obtaining in the described finding step according to following formula,
In the formula: Td-software delay duration, the μ s of unit;
θ-ignition advance angle;
The N-engine speed, the r/min of unit;
(5) send the fire signal step, ECU sends fire signal through after the time-delay corresponding to the delay duration that draws in the calculation procedure.
By reference to the accompanying drawings the specific embodiment of the present invention has been carried out exemplary description above, obvious scope of the present invention is not limited thereto, and the various distortion of making in the thought that the present invention proposes all do not exceed scope of the present invention.
Claims (1)
1. method of adjusting the ignition advance angle of biogas (or rock gas)/gasoline dual-purpose motor, described biogas (or rock gas)/gasoline dual-purpose motor comprises gasoline feeding unit, biogas (or rock gas) feeding unit, cylinder body and ECU control unit, described ECU control unit overlaps independently by CPU, memory module, input interface circuit module, output interface circuit module, setup unit, display modular and two, and the energy storage ignition module constitutes, it is characterized in that this method may further comprise the steps:
(1) set step, setting the supplied fuel classification in the setup unit of ECU is that gasoline or methane content are respectively 50%, 60% or 70% biogas (or rock gas);
(2) distribute starting ignition advance angle step, starting under the operating mode, according to the fuel classification of setting in the described setting step, for gasoline or methane content are respectively the starting ignition advance angle that 50%, 60%, 70% biogas (or rock gas) distributes 5 °, 24 °, 22 ° and 20 ° respectively;
(3) finding step, when running well, the numerical value of the fuel classification that the ECU basis sets and air inlet pressure sensor, intake air temperature sensor, speed probe, search best ignition advance angle numerical value in the data sheet from be stored in described RAM, described data sheet comprises at gasoline and is respectively the ignition advance angle optimum data of 50%, 60% or 70% biogas (or rock gas);
(4) calculation procedure, ECU calculates delay duration according to the electronic spark advance angular data of obtaining in the described finding step according to following formula,
In the formula: Td-software delay duration, the μ s of unit;
θ-ignition advance angle;
The N-engine speed, the r/min of unit;
(5) send the fire signal step, ECU sends fire signal through after the time-delay corresponding to the delay duration that draws in the calculation procedure.
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| CN110374736A (en) * | 2019-07-19 | 2019-10-25 | 潍柴西港新能源动力有限公司 | A method of control Biogas Generator Set stable operation |
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| CN107218168B (en) * | 2017-07-21 | 2019-03-12 | 中国第一汽车股份有限公司 | The method of adjustment of gasoline the natural gas flexible fuel engine angle of ignition and ignition energy |
| CN107461289A (en) * | 2017-08-24 | 2017-12-12 | 中国第汽车股份有限公司 | The method of adjustment of the gasoline natural gas flexible fuel engine angle of ignition |
| CN107461289B (en) * | 2017-08-24 | 2019-03-12 | 中国第一汽车股份有限公司 | The method of adjustment of the gasoline natural gas flexible fuel engine angle of ignition |
| CN110374736A (en) * | 2019-07-19 | 2019-10-25 | 潍柴西港新能源动力有限公司 | A method of control Biogas Generator Set stable operation |
| CN111140355A (en) * | 2019-12-23 | 2020-05-12 | 潍柴动力股份有限公司 | Tempering monitoring method and system |
| CN111140355B (en) * | 2019-12-23 | 2021-06-18 | 潍柴动力股份有限公司 | Tempering monitoring method and system |
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