CN101798965A - Method and device for controlling abnormal combustion of hydrogen-fueled engine - Google Patents
Method and device for controlling abnormal combustion of hydrogen-fueled engine Download PDFInfo
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- CN101798965A CN101798965A CN201010114084A CN201010114084A CN101798965A CN 101798965 A CN101798965 A CN 101798965A CN 201010114084 A CN201010114084 A CN 201010114084A CN 201010114084 A CN201010114084 A CN 201010114084A CN 101798965 A CN101798965 A CN 101798965A
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Abstract
The invention relates to a method and a device for controlling the abnormal combustion of a hydrogen-fueled engine. The method of the invention for controlling the abnormal combustion of the hydrogen-fueled engine comprises the following steps: judging whether the hydrogen-fueled engine is pre-ignited and tempered or not according to acquired pre-ignition and tempering signals; when the hydrogen-fueled engine is pre-ignited, adopting a mode of regulating ignition timing to suppress the pre-ignition; and when the hydrogen-fueled engine is tempered or is pre-ignited and tempered, adopting the mode of regulating the ignition timing or the mode of regulating the ignition timing and the working water jet capacity of an intake pipe synchronously and in steps respectively according to different tempering strengths to suppress the tempering. Through the method, the hydrogen-fueled engine primarily ensures high economical efficiency when working under the working condition of low and moderate load and primarily ensures dynamic performance indexes when working under the working condition of large full-load; and the method has the advantages of effectively suppressing the abnormal combustion, such as the pre-ignition, the tempering and the like, fully developing the maximal advantages of the ignition timing and the water jet of the intake pipe and simultaneously taking the performance of the engine into account.
Description
Technical field
The present invention relates to the controlling method and the device of abnormal combustion of hydrogen-fueled engine.
Background technique
Hydrogen fuel has unique advantage aspect the energy and the environmental protection, one of the leading fuel that is considered to the following motor car engine of tool prospect, but because the physicochemical properties of hydrogen uniqueness, abnormal combustion problems such as pre-ignition, tempering take place in hydrogen as Engine Alternative Fuel easily, when equivalent proportion is big more so; Reducing equivalent proportion can cause engine power performance to descend.Therefore control abnormal combustions such as tempering, pre-ignition, and the contradiction of coordinating to solve abnormal combustion and improve hydrogen-fuel engine power is the key that promotes the hydrogen engine technological progress.
The suction tude tempering, be meant in intake process, when intake valve is not closed as yet, the hydrogen air Mixture of flame propagation in the suction tude and the suction tude of igniting in the cylinder, or the interior hydrogen air Mixture of suction tude is by in the cylinder or intake valve incandescent spot a kind of malcombustion phenomenon of lighting.Tempering generally is accompanied by pre-ignition (pre-ignition is meant the phenomenon that mixed gas was lighted by incandescent spot in the cylinder in the cylinder before spark ignitor) and takes place.Tempering usually occurs in than the rich mixture operating mode, is easier to during high speed take place.When hydrogen engine generation tempering, normal working procedure is destroyed, and power descends, and the Economy variation makes engine misses when serious, therefore must suppress the tempering of hydrogen engine.
In recent years, follow the develop rapidly of computer and control technique, the electronic control technology of traditional petroleum fuel motor is practicability progressively, but at present actually rare for the research of hydrogen engine, and is considerably less about the research of hydrogen engine electronic control technology.Though people such as Yuan Yinnan study automatically controlled spray hydrogen system on the SQR480 of the Cherry motor of repacking, proposed utilization PWM driving high speed switch type digital solenoid valve and can effectively control spray hydrogen amount; Single-chip Controlling hydrogen--inquire into by the gasoline dual fuel engine tempering to using for people such as Du Tianshen, propose to use 51 series monolithics, realize that different operating mode lower inlet ducts regularly, quantitatively spray hydrogen, suppress the generation of tempering effectively, but abnormal combustions such as control tempering, pre-ignition, take into account the hydrogen-fuel engine tempering simultaneously and still have to be solved with this problem of contradiction between the raising power.
Summary of the invention
The controlling method and the device that the purpose of this invention is to provide a kind of abnormal combustion of hydrogen-fueled engine are to solve the contradiction between existing hydrogen-fuel engine pre-ignition, tempering abnormal combustion and hydrogen-fuel engine tempering and the raising power.
The controlling method technological scheme of hydrogen-fuel engine tempering of the present invention is as follows: when hydrogen-fuel engine generation tempering, take to adjust ignition timing or adjustment ignition timing and suction tude injection flow rate substep in parallel mode respectively according to the difference of tempering intensity and suppress tempering.
When hydrogen engine generation tempering, at first calculate tempering intensity, make the sign function of tempering intensity be
, wherein y represents suction press intensity; Calculate tempering inhibition degree again, make the sign function of tempering inhibition degree be
, wherein x is ignition timing, z is a suction tude water spray rate; Judge that whether tempering intensity is greater than tempering intensity threshold value, if tempering intensity is then called tempering inhibition degree and ignition timing and water spray rate function greater than tempering intensity threshold value, adjust ignition timing and injection flow rate again and take into account power character, if tempering intensity is less than tempering intensity threshold value, then call tempering inhibition degree and ignition timing function, adjust ignition timing again and take into account power character.
Described adjustment ignition timing and injection flow rate are also taken into account power character, adjust ignition timing and take into account power character, be to determine the relation of the pre-ignition of relation, ignition timing or the injection flow rate of the power character of ignition timing or injection flow rate and hydrogen engine or Economy and hydrogen engine or tempering, the comprehensively power character or the Economy of ignition timing or injection flow rate and hydrogen engine by test, and with the relation of pre-ignition or tempering; Then by these test data fittings being obtained the equation of relation curve, or the centrifugal pump that will describe their relations is stored in when engine calibration in the microprocessor in advance, during use, according to the engine working conditions inquiry, call analog value.
The technological scheme of the controlling method of abnormal combustion of hydrogen-fueled engine of the present invention is as follows: at first judge according to the pre-ignition, the tempering signal that collect whether hydrogen-fuel engine pre-ignition, tempering take place; When hydrogen-fuel engine generation pre-ignition, the mode of taking to adjust ignition timing suppresses pre-ignition; When hydrogen-fuel engine generation tempering or generation pre-ignition and generation tempering, take to adjust ignition timing or adjustment ignition timing and suction tude injection flow rate substep in parallel mode respectively according to the difference of tempering intensity and suppress tempering.
During hydrogen-fuel engine generation pre-ignition, at first calculate pre-ignition intensity, make the sign function of pre-ignition intensity be
, wherein
Expression cylinder pressure intensity; Calculate pre-ignition inhibition degree again, the sign function that makes pre-ignition inhibition degree is for characterizing function
, and
, wherein
Be ignition timing,
It is constant greater than 1; Call pre-ignition inhibition degree and ignition timing function again; Whether judge load intensity greater than the load intensity threshold value,, less than the load intensity threshold value, then adjust ignition timing and take into account Economy as if load intensity if load intensity, is then adjusted ignition timing greater than the load intensity threshold value and taken into account power character.
Described adjustment ignition timing also takes into account power character or Economy, is the relation of being determined the power character of ignition timing and hydrogen engine or Economy by test, and the evaluation function that hydrogen effective thermal efficiency (Economy) is fired in order is
,
, when
Satisfy
The time effective thermal efficiency
Maximum, wherein
Be maximum pre-ignition inhibition degree.
When hydrogen-fuel engine generation tempering or generation pre-ignition and generation tempering, at first calculate tempering intensity, make the sign function of tempering intensity be
, wherein y represents suction press intensity; Calculate tempering inhibition degree again, make the sign function of tempering inhibition degree be
, wherein x is ignition timing, z is a suction tude water spray rate; Judge that whether tempering intensity is greater than tempering intensity threshold value, if tempering intensity is greater than tempering intensity threshold value, then call tempering inhibition degree and ignition timing and water spray rate function, if tempering intensity less than tempering intensity threshold value, is then called tempering inhibition degree and ignition timing function.
Adjust ignition timing and injection flow rate and take into account power character after calling tempering inhibition degree and ignition timing and water spray rate function; Adjust ignition timing and take into account power character after calling tempering inhibition degree and ignition timing function.
Described adjustment ignition timing and injection flow rate are also taken into account power character, adjust ignition timing and take into account power character, be to determine the relation of the pre-ignition of relation, ignition timing or the injection flow rate of the power character of ignition timing or injection flow rate and hydrogen engine or Economy and hydrogen engine or tempering, the comprehensively power character or the Economy of ignition timing or injection flow rate and hydrogen engine by test, and with the relation of pre-ignition or tempering; Then by these test data fittings being obtained the equation of relation curve, or the centrifugal pump that will describe their relations is stored in when engine calibration in the microprocessor in advance, during use, according to the engine working conditions inquiry, call analog value; Make the evaluation function of power character (useful horsepower) be
, x is ignition timing, z is a suction tude water spray rate,
, when satisfying
The time
Maximum, wherein
Be the suction tude maximum tempering inhibition degree of spraying water.
The technological scheme of the control gear of abnormal combustion of hydrogen-fueled engine of the present invention is as follows: this device comprises:
Sensor signal is handled input circlult, the pre-ignition, the tempering signal that are used for each sensor is obtained are sent into microprocessor through input circlult, wherein input signal comprises analogue signal and digital signal, analogue signal is through processing circuit, send into microprocessor through A/D conversion back with the form of digital quantity again, digital signal is directly sent into microprocessor by the I/O interface;
Microprocessor is used for that signal according to input carries out data processing, control computing and logic are judged, draw hydrogen engine whether pre-ignition, tempering take place, by interface to the power drive output circuit send control pre-ignition and/tempering instructs;
The power drive output circuit is used for linking to each other with final controlling element, the instruction of microprocessor is become control signal drive corresponding peripheral power device.
The controlling method of hydrogen-fuel engine tempering of the present invention is according to the difference of tempering intensity, take to adjust ignition timing or adjustment ignition timing and suction tude injection flow rate mode step by step in parallel respectively and control tempering, this method not only can effectively be controlled the tempering of hydrogen-fuel engine, the sharpest edges of ignition timing and suction tude water spray have been given full play to, and avoided unfavorable factor separately to the full extent, taken into account the power character of motor simultaneously.
The controlling method of abnormal combustion of hydrogen-fueled engine of the present invention is taked different control modes respectively according to the mode difference of abnormal combustion, and when hydrogen-fuel engine generation pre-ignition, the mode of taking to adjust ignition timing suppresses pre-ignition; When hydrogen-fuel engine generation tempering or generation pre-ignition and generation tempering, take to adjust ignition timing or adjustment ignition timing and suction tude injection flow rate substep in parallel mode respectively according to the difference of tempering intensity and suppress tempering, this method makes hydrogen-fuel engine when medium and small load condition is worked, to guarantee Economy well, under big full load mode, to guarantee power index, so both effectively suppressed pre-ignition, abnormal combustions such as tempering, and given full play to the sharpest edges of ignition timing and suction tude water spray, taken into account the power character of motor simultaneously.
The microprocessor of the control gear of abnormal combustion of hydrogen-fueled engine of the present invention is used for carrying out data processing, control computing and logic judgement according to the signal of input, draw hydrogen engine whether pre-ignition, tempering take place, by interface to the power drive output circuit send control pre-ignition and/tempering instruction, with final controlling element precision maneuvers such as control ignition coil, spray water valves, realize control to pre-ignition, tempering.
Description of drawings
Fig. 1 is an abnormal combustion of hydrogen-fueled engine controlling method flow chart of the present invention;
Fig. 2 is an abnormal combustion of hydrogen-fueled engine control gear theory diagram of the present invention;
Fig. 3 is tempering testing circuit figure of the present invention.
Embodiment
When if the hydrogen-fuel engine hydrogen engine is worked at medium and small load condition, to guarantee its Economy well.And pre-ignition be difficult for to take place under the load condition, and the degree that pre-ignition takes place is generally lighter in little,, and angle is adjusted in ignition timing be associated with the hydrogen engine Economy so the scheme that the present invention takes to adjust ignition timing suppresses pre-ignition.Under big full load mode, guaranteeing power index, if when pre-ignition takes place, the present invention takes to suppress by adjusting ignition timing; Tempering takes place, simple dependence is adjusted ignition timing and often has been not enough to suppress tempering, but, consider that excess air coefficient is less under this operating mode, and excess air coefficient is more little, and the tempering degree is big more, and it is big more to suppress the required injection flow rate of tempering, can cause cylinder temperature to descend significantly like this, cause power to descend.Certainly, the suction tude water spray also can cause the corresponding change of engine structure, and along with the suction tude water spray increases, cylinder body corrosion degree, greasy property also will further worsen, so adopt suction tude water spray control tempering, a lot of drawbacks is arranged when injection flow rate increases.The present invention takes to adjust the scheme that ignition timing and suction tude water spray combine, the sharpest edges of ignition timing and suction tude water spray had so both been given full play to, also avoid unfavorable factor separately to the full extent, both suppressed tempering, taken into account the power character and the Economy of motor again.To adjust injection flow rate is associated with the hydrogen engine power character, promptly according to the intensity size of pre-ignition and tempering, when tempering takes place, adjust ignition timing earlier to a certain angle, suction tude begins water spray, and progressively strengthens injection flow rate, when the adjustment ignition timing still can not be controlled tempering to limit angle, then continuing increases the suction tude injection flow rate, until suction tude injection flow rate maximum value.Fig. 1 shows pre-ignition of the present invention, tempering controlling method flow chart, and wherein B is a tempering intensity threshold value,
Be the intensity threshold value of loading.
Embodiment one:
The controlling method technological scheme of hydrogen-fuel engine tempering of the present invention is as follows: when hydrogen-fuel engine generation tempering, take to adjust ignition timing or adjustment ignition timing and suction tude injection flow rate substep in parallel mode respectively according to the difference of tempering intensity and suppress tempering.
When hydrogen engine generation tempering, at first calculate tempering intensity, make the sign function of tempering intensity be
, wherein y represents suction press intensity; Calculate tempering inhibition degree again, make the sign function of tempering inhibition degree be
, wherein x is ignition timing, z is a suction tude water spray rate; Judge that whether tempering intensity is greater than tempering intensity threshold value, if tempering intensity is then called tempering inhibition degree and ignition timing and water spray rate function greater than tempering intensity threshold value, adjust ignition timing and injection flow rate again and take into account power character, if tempering intensity is less than tempering intensity threshold value, then call tempering inhibition degree and ignition timing function, adjust ignition timing again and take into account power character.
Described adjustment ignition timing and injection flow rate are also taken into account power character, adjust ignition timing and take into account power character, be to determine the relation of the pre-ignition of relation, ignition timing or the injection flow rate of the power character of ignition timing or injection flow rate and hydrogen engine or Economy and hydrogen engine or tempering, the comprehensively power character or the Economy of ignition timing or injection flow rate and hydrogen engine by test, and with the relation of pre-ignition or tempering; Then by these test data fittings being obtained the equation of relation curve, or the centrifugal pump that will describe their relations is stored in when engine calibration in the microprocessor in advance, during use, according to the engine working conditions inquiry, call analog value.
Embodiment two:
The technological scheme of the controlling method of abnormal combustion of hydrogen-fueled engine of the present invention is as follows; At first judge according to the pre-ignition, the tempering signal that collect whether hydrogen-fuel engine pre-ignition, tempering take place; When hydrogen-fuel engine generation pre-ignition, the mode of taking to adjust ignition timing suppresses pre-ignition; When hydrogen-fuel engine generation tempering or generation pre-ignition and generation tempering, take to adjust ignition timing or adjustment ignition timing and suction tude injection flow rate substep in parallel mode respectively according to the difference of tempering intensity and suppress tempering.
During hydrogen-fuel engine generation pre-ignition, at first calculate pre-ignition intensity, make the sign function of pre-ignition intensity be
, wherein
Expression cylinder pressure intensity; Calculate pre-ignition inhibition degree again, the sign function that makes pre-ignition inhibition degree is for characterizing function
, and
, wherein
Be ignition timing,
It is constant greater than 1; Call pre-ignition inhibition degree and ignition timing function again; Whether judge load intensity greater than the load intensity threshold value,, less than the load intensity threshold value, then adjust ignition timing and take into account Economy as if load intensity if load intensity, is then adjusted ignition timing greater than the load intensity threshold value and taken into account power character.
Generation causes big negative effect to Economy in order to be unlikely to again when suppressing pre-ignition, and the evaluation function of introducing combustion hydrogen effective thermal efficiency (Economy) is
, and the evaluation function of effective thermal efficiency is associated with pre-ignition inhibition degree
In order to have suppressed pre-ignition, take into account effective thermal efficiency again, promptly satisfying
(wherein,
Be maximum pre-ignition inhibition degree) situation under the effective thermal efficiency maximum.Obtain the representation of following constrained optimization problem for this reason:
When hydrogen-fuel engine generation tempering or generation pre-ignition and generation tempering, at first calculate tempering intensity, make the sign function of tempering intensity be
, wherein y represents suction press intensity; Calculate tempering inhibition degree again, make the sign function of tempering inhibition degree be
, wherein x is ignition timing, z is a suction tude water spray rate; Judge that whether tempering intensity is greater than tempering intensity threshold value, if tempering intensity is greater than tempering intensity threshold value, then call tempering inhibition degree and ignition timing and water spray rate function, adjust ignition timing and injection flow rate again and take into account power character, if tempering intensity is less than tempering intensity threshold value, then call tempering inhibition degree and ignition timing function, adjust ignition timing again and take into account power character.
Described adjustment ignition timing and injection flow rate are also taken into account power character, adjust ignition timing and take into account power character, be to determine the relation of the pre-ignition of relation, ignition timing or the injection flow rate of the power character of ignition timing or injection flow rate and hydrogen engine or Economy and hydrogen engine or tempering, the comprehensively power character or the Economy of ignition timing or injection flow rate and hydrogen engine by test, and with the relation of pre-ignition or tempering; Then by these test data fittings being obtained the equation of relation curve, or the centrifugal pump that will describe their relations is stored in when engine calibration in the microprocessor in advance, during use, according to the engine working conditions inquiry, call analog value; Make the evaluation function of power character (useful horsepower) be
, and the evaluation function that makes useful horsepower be associated with ignition timing tempering inhibition degree and suction tude water spray rate tempering inhibition degree, promptly
Then in order to eliminate tempering, the optimization problem of taking into account power character again is exactly to satisfy
(
Be the suction tude maximum tempering inhibition degree of spraying water) condition under make formula
Reach maximum, so both the representation of following constrained optimization problem
Embodiment three:
The control gear of abnormal combustion of hydrogen-fueled engine of the present invention as shown in Figure 2, this device comprises:
Sensor signal is handled input circlult, the pre-ignition, the tempering signal that are used for each sensor is obtained are sent into microprocessor through input circlult, wherein input signal comprises analogue signal and digital signal, analogue signal is through processing circuit, send into microprocessor through A/D conversion back with the form of digital quantity again, digital signal is directly sent into microprocessor by the I/O interface;
Microprocessor (MC9S12DG256B) is used for that signal according to input carries out data processing, control computing and logic are judged, draw hydrogen engine whether pre-ignition, tempering take place, by interface to the power drive output circuit send control pre-ignition and/tempering instructs;
The power drive output circuit is used for linking to each other with final controlling element, the instruction of microprocessor is become control signal drive corresponding peripheral power device.
Air flow rate signal, the suction press signal, the throttle opening signal, the coolant water temperature signal, crankshaft-position signal, the hydrogen flowing quantity signal, sensor signals such as Hydrogen Vapor Pressure signal are by analog signal input circuit and through being connected into the respective pins of microprocessor MC9S12DG256B after the A/D conversion, the tempering testing signal, camshaft-position signal directly is connected into the I/O interface of microprocessor MC9S12DG256B respectively by the digital signal input circlult, microprocessor MC9S12DG256B directly and the PC supervisory system carry out real-time communication, can carry out on-line fault diagnosis and emergency processing; Output circuit becomes control signal with the control command of microprocessor MC9S12DG256B and drives final controlling element such as the spray hydrogen device that connected, spark coil, spray water valve and move.
The distinctive tempering of hydrogen-fuel engine in the control gear of abnormal combustion of hydrogen-fueled engine, pre-ignition test section are as follows:
1. tempering testing circuit
Because the hydrogen-fuel engine tempering has contingency, a destructiveness, therefore high sensitivity tempering testing circuit is as shown in Figure 3 in this device, its main feature has: it has abandoned traditional micro-pressure sensor detection thought (1), has avoided the hysteresis quality and the mistake property surveyed (possible other reason build-up of pressure fluctuation) of sensor; (2) mode that adopts physical principle and circuit design to combine realizes the detection of suction tude tempering, and it can detect the generation of tempering accurately and reliably; (3) circuit design is simply clear, and programming is easy to realize.
Tempering testing circuit working principle: because suction tude tempering or lighted by the intake valve focus or lighted to scurry and take place in the suction tude by intake valve by focus in the cylinder.So detector probe (metal film of good heat resistance) is installed in the top near intake valve, the high alloy steel wire of other end heat resistance of circuit is installed in intake valve place (not contacting with intake valve).
When tempering takes place, at first burning around detector probe and alloy steel wire of mixed gas, because the high temperature that combustion flame produces causes air ionization, when between probe and alloy steel wire, adding positive voltage, to there be electric current to produce, when adding negative voltage, almost do not have electric current, this moment, flame had the unilateral conduction characteristic of diode.When flame extinction, the voltage that adds any polarity between probe and the alloy steel wire can not produce electric current.Utilize this characteristic of flame, just can detect tempering and whether take place.The concrete working procedure of tempering testing circuit is: transistor
With
Keep transformer
Vibration, make transformer output AC signal, when transformer output just during half part alternating signal, what add between detector probe and the alloy steel wire is negative voltage, not conducting of circuit, when half part alternating signal was born in transformer output, what add between detector probe and the alloy steel wire was positive voltage, circuit turn-on makes probe left side
,
The electric capacity charging, thus a negative voltage produced, through comparator
Voltage ratio after, the comparator output low level, make the PT2 mouth of microprocessor MC9S12DG256B become low level, obtain a trailing edge, thereby microprocessor MC9S12DG256B is by interrupting detecting the accurate detection counting that this trailing edge is finished the tempering signal by high level.
2. suction press and in-cylinder pressure sensor
If hydrogen engine generation tempering has pressure surge in the suction tude, the intensity when intake manifold pressure sensor is used for detecting the tempering generation.Pre-ignition and tempering transform mutually, if when pre-ignition does not change into tempering, pre-ignition is effectively controlled, can avoid the generation of tempering, so pre-ignition detection, measurement are had certain practical significance.If hydrogen engine generation pre-ignition, the pressure in the cylinder will undesired rising before not lighting a fire, and in-cylinder pressure sensor is used for detecting pre-ignition generation and pre-ignition intensity.Suction press and in-cylinder pressure sensor adopt semiconductor piezoresistance formula sensor and spark plug formula cylinder pressure sensor respectively in this device.Semiconductor piezoresistance formula sensor mainly is made of spring diaphragm and an irony magnetic core of a good seal, diaphragm and magnetic core accurately are placed in the miniature coils, when sensing voltage, just produce one be directly proportional with incoming pressure, with the proportional output signal of reference voltage, output voltage changes between 0-5V, can directly carry out the A/D conversion.The output signal of suction press and in-cylinder pressure sensor is inserted PAD1 and the PAD3 of microprocessor MC9S12DG256B.
Claims (10)
1. the controlling method of a hydrogen-fuel engine tempering is characterized in that: when hydrogen-fuel engine generation tempering, take to adjust ignition timing or adjustment ignition timing and suction tude injection flow rate substep in parallel mode respectively according to the difference of tempering intensity and suppress tempering.
2. the controlling method of hydrogen-fuel engine tempering according to claim 1 is characterized in that: when hydrogen engine generation tempering, at first calculate tempering intensity, make the sign function of tempering intensity be
, wherein y represents suction press intensity; Calculate tempering inhibition degree again, make the sign function of tempering inhibition degree be
, wherein x is ignition timing, z is a suction tude water spray rate; Judge that whether tempering intensity is greater than tempering intensity threshold value, if tempering intensity is then called tempering inhibition degree and ignition timing and water spray rate function greater than tempering intensity threshold value, adjust ignition timing and injection flow rate again and take into account power character, if tempering intensity is less than tempering intensity threshold value, then call tempering inhibition degree and ignition timing function, adjust ignition timing again and take into account power character.
3. the controlling method of hydrogen-fuel engine tempering according to claim 2, it is characterized in that: described adjustment ignition timing and injection flow rate are also taken into account power character, adjust ignition timing and take into account power character, be to determine the relation of the pre-ignition of relation, ignition timing or the injection flow rate of the power character of ignition timing or injection flow rate and hydrogen engine or Economy and hydrogen engine or tempering, the comprehensively power character or the Economy of ignition timing or injection flow rate and hydrogen engine by test, and with the relation of pre-ignition or tempering; Then by these test data fittings being obtained the equation of relation curve, or the centrifugal pump that will describe their relations is stored in when engine calibration in the microprocessor in advance, during use, according to the engine working conditions inquiry, call analog value.
4. the controlling method of an abnormal combustion of hydrogen-fueled engine is characterized in that: at first judge according to the pre-ignition, the tempering signal that collect whether hydrogen-fuel engine pre-ignition, tempering take place; When hydrogen-fuel engine generation pre-ignition, the mode of taking to adjust ignition timing suppresses pre-ignition; When hydrogen-fuel engine generation tempering or generation pre-ignition and generation tempering, take to adjust ignition timing or adjustment ignition timing and suction tude injection flow rate substep in parallel mode respectively according to the difference of tempering intensity and suppress tempering.
5. the controlling method of abnormal combustion of hydrogen-fueled engine according to claim 4 is characterized in that: during hydrogen-fuel engine generation pre-ignition, at first calculate pre-ignition intensity, make the sign function of pre-ignition intensity be
, wherein
Expression cylinder pressure intensity; Calculate pre-ignition inhibition degree again, the sign function that makes pre-ignition inhibition degree is for characterizing function
, and
, wherein
Be ignition timing,
It is constant greater than 1; Call pre-ignition inhibition degree and ignition timing function again; Whether judge load intensity greater than the load intensity threshold value,, less than the load intensity threshold value, then adjust ignition timing and take into account Economy as if load intensity if load intensity, is then adjusted ignition timing greater than the load intensity threshold value and taken into account power character.
6. the controlling method of abnormal combustion of hydrogen-fueled engine according to claim 5, it is characterized in that: described adjustment ignition timing also takes into account power character or Economy, be the relation of being determined the power character of ignition timing and hydrogen engine or Economy by test, the evaluation function that hydrogen effective thermal efficiency (Economy) is fired in order is
,
, when
Satisfy
The time effective thermal efficiency
Maximum, wherein
Be maximum pre-ignition inhibition degree.
7. the controlling method of abnormal combustion of hydrogen-fueled engine according to claim 4 is characterized in that: when hydrogen-fuel engine generation tempering or generation pre-ignition and generation tempering, at first calculate tempering intensity, make the sign function of tempering intensity be
, wherein y represents suction press intensity; Calculate tempering inhibition degree again, make the sign function of tempering inhibition degree be
, wherein x is ignition timing, z is a suction tude water spray rate; Judge that whether tempering intensity is greater than tempering intensity threshold value, if tempering intensity is greater than tempering intensity threshold value, then call tempering inhibition degree and ignition timing and water spray rate function, if tempering intensity less than tempering intensity threshold value, is then called tempering inhibition degree and ignition timing function.
8. according to the controlling method of claim 4 or 7 described abnormal combustion of hydrogen-fueled engine, it is characterized in that: adjust ignition timing and injection flow rate and take into account power character after calling tempering inhibition degree and ignition timing and water spray rate function; Adjust ignition timing and take into account power character after calling tempering inhibition degree and ignition timing function.
9. the controlling method of abnormal combustion of hydrogen-fueled engine according to claim 8, it is characterized in that: described adjustment ignition timing and injection flow rate are also taken into account power character, adjust ignition timing and take into account power character, be to determine the relation of the pre-ignition of relation, ignition timing or the injection flow rate of the power character of ignition timing or injection flow rate and hydrogen engine or Economy and hydrogen engine or tempering, the comprehensively power character or the Economy of ignition timing or injection flow rate and hydrogen engine by test, and with the relation of pre-ignition or tempering; Then by these test data fittings being obtained the equation of relation curve, or the centrifugal pump that will describe their relations is stored in when engine calibration in the microprocessor in advance, during use, according to the engine working conditions inquiry, call analog value; Make the evaluation function of power character (useful horsepower) be
, x is ignition timing, z is a suction tude water spray rate,
, when satisfying
The time
Maximum, wherein
Be the suction tude maximum tempering inhibition degree of spraying water.
10. the control gear of an abnormal combustion of hydrogen-fueled engine is characterized in that, this device comprises:
Sensor signal is handled input circlult, the pre-ignition, the tempering signal that are used for each sensor is obtained are sent into microprocessor through input circlult, wherein input signal comprises analogue signal and digital signal, analogue signal is through processing circuit, send into microprocessor through A/D conversion back with the form of digital quantity again, digital signal is directly sent into microprocessor by the I/O interface;
Microprocessor is used for that signal according to input carries out data processing, control computing and logic are judged, draw hydrogen engine whether pre-ignition, tempering take place, by interface to the power drive output circuit send control pre-ignition and/tempering instructs;
The power drive output circuit is used for linking to each other with final controlling element, the instruction of microprocessor is become control signal drive corresponding peripheral power device.
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| CN2010101140843A CN101798965B (en) | 2010-02-26 | 2010-02-26 | Method and device for controlling abnormal combustion of hydrogen-fueled engine |
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|---|---|---|---|
| CN2010101140843A CN101798965B (en) | 2010-02-26 | 2010-02-26 | Method and device for controlling abnormal combustion of hydrogen-fueled engine |
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| CN2010101140843A Expired - Fee Related CN101798965B (en) | 2010-02-26 | 2010-02-26 | Method and device for controlling abnormal combustion of hydrogen-fueled engine |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322337A (en) * | 2011-08-02 | 2012-01-18 | 华北水利水电学院 | Tempering prevention and abnormal combustion restraining method of hydrogen fuel combustion engine |
| CN104564483A (en) * | 2015-01-04 | 2015-04-29 | 同济大学 | Detection device and method for detecting pre-ignition of spark plug ignition type engine |
| CN107687388A (en) * | 2016-08-05 | 2018-02-13 | 现代自动车株式会社 | Equipment for the tempering that prevents engine and the method using the equipment |
| CN108071506A (en) * | 2016-11-10 | 2018-05-25 | 罗伯特·博世有限公司 | For diagnosing the method and apparatus of the refrigerant injection device of explosive motor |
| CN110685827A (en) * | 2019-10-09 | 2020-01-14 | 合肥工业大学 | Structure is adjusted to engine inlet physical and chemical characteristics |
| CN114837833A (en) * | 2022-05-24 | 2022-08-02 | 潍柴动力股份有限公司 | Method and device for reducing tempering hazard of natural gas hydrogen-blended engine |
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| CN1800617A (en) * | 2006-01-13 | 2006-07-12 | 镇江江奎科技有限公司 | Apparatus and method for controlling internal combustion engine with hydrogen fuel |
| CN101560931A (en) * | 2008-12-12 | 2009-10-21 | 北京理工大学 | Hydrogen supply control device for hydrogen internal combustion engine |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1800617A (en) * | 2006-01-13 | 2006-07-12 | 镇江江奎科技有限公司 | Apparatus and method for controlling internal combustion engine with hydrogen fuel |
| CN101560931A (en) * | 2008-12-12 | 2009-10-21 | 北京理工大学 | Hydrogen supply control device for hydrogen internal combustion engine |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322337A (en) * | 2011-08-02 | 2012-01-18 | 华北水利水电学院 | Tempering prevention and abnormal combustion restraining method of hydrogen fuel combustion engine |
| CN104564483A (en) * | 2015-01-04 | 2015-04-29 | 同济大学 | Detection device and method for detecting pre-ignition of spark plug ignition type engine |
| CN107687388A (en) * | 2016-08-05 | 2018-02-13 | 现代自动车株式会社 | Equipment for the tempering that prevents engine and the method using the equipment |
| CN108071506A (en) * | 2016-11-10 | 2018-05-25 | 罗伯特·博世有限公司 | For diagnosing the method and apparatus of the refrigerant injection device of explosive motor |
| CN110685827A (en) * | 2019-10-09 | 2020-01-14 | 合肥工业大学 | Structure is adjusted to engine inlet physical and chemical characteristics |
| CN114837833A (en) * | 2022-05-24 | 2022-08-02 | 潍柴动力股份有限公司 | Method and device for reducing tempering hazard of natural gas hydrogen-blended engine |
| CN114837833B (en) * | 2022-05-24 | 2023-06-23 | 潍柴动力股份有限公司 | Method and device for reducing tempering hazard of natural gas hydrogen-doped engine |
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| CN101798965B (en) | 2013-07-24 |
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