CN208982209U - Fuel-air is pre-mixed homogeneous charge electromagnet ignition type internal combustion - Google Patents
Fuel-air is pre-mixed homogeneous charge electromagnet ignition type internal combustion Download PDFInfo
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- CN208982209U CN208982209U CN201820640741.XU CN201820640741U CN208982209U CN 208982209 U CN208982209 U CN 208982209U CN 201820640741 U CN201820640741 U CN 201820640741U CN 208982209 U CN208982209 U CN 208982209U
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Abstract
The utility model discloses a kind of Fuel-airs to be pre-mixed homogeneous charge electromagnet ignition type internal combustion and ignition method, including control unit of engine, electromagnetic wave source, coupling unit and cylinder.The applicable pluralities of fuel of the internal combustion engine, fuel include but is not limited to gasoline, diesel oil, natural gas.Sparking mode includes the following steps: that control unit of engine sends the order generated with the consistent electromagnetic wave of cylinder resonance frequency at that time in the specified angular electromagnetic wave source of electronic spark advance, electromagnetic wave source generates electromagnetic wave according to the order, and pass through the transmission line and coupled antenna in coupling unit, electromagnetic wave is input to the casing housing interior resonance of internal combustion engine, strong electrical field is generated, large volume igniting is carried out.The utility model guarantees that electromagnetic coupling and resonance opportunity are almost the same with ignition timing, and the probability of EMR electromagnetic resonance occurs when greatly improving igniting in cylinder, realizes that the Fuel-air of internal combustion engine is pre-mixed homogeneous charge electromagnet igniting.
Description
Technical field
The application belongs to auto industry and electronic technology field, specifically, it is homogeneous to be related to a kind of Fuel-air premixing
Charge electromagnet ignited internal combustion engine.
Background technique
Existing internal combustion engine can be divided into two classes according to the difference of ignition system, and one kind is put by high voltage pulse spark
Electricity lights homogeneous gas mixture in cylinder, is spark ignition (spark ignition) engine；Another kind of ignition system
It is that oil spout is caught fire after air high pressure warming, is compression ignition (compress ignition) engine.Spark ignition is suitable for different combustions
Material starts family, including petrol engine, natural gas (including compression and liquefied natural gas) engine, and can be used simultaneously oil
The dual fuel engine of gas and can switching uses in two kinds of fuel (vapour oil and gas) flexible fuel engine, and compression ignition
Engine is generally diesel engine.
When using high voltage pulse spark ignition, by taking petrol engine as an example, 8 kilovolts or more high electric field pulses are added to fire
When between about 1 millimeter of the electrode apart of Hua Sai, one is generated between two (or multiple) electrodes of spark plug in cylinder
The equivalent high electric field (8 × 10 of transient state6Volt/rice).This equivalent high electric field causes the disruptive discharge of air-fuel mixture medium, then opens
Begin to burn.The ignition energy as needed for natural gas engine is higher than the ignition energy of gasoline engine, so natural gas engine
Machine usually reduces spark plug spacing to 0.3 to 0.45 millimeter, to form transient state when being greater than gasoline IC engine sparking plug igniting
Equivalent high electric field is to realize mixed gas disruptive discharge.
Table 1 is the fuel characteristic of vapour oil and gas, and specific environment condition is temperature zero degrees celsius, a standard atmospheric pressure
Under:
1 gasoline of table and gas fuel characteristic
In order to reach the disruptive discharge of oil gas, the size and distance all very littles (about 1 millimeter) of electrode, in natural gas engine
In it is smaller, thus discharge occur on a very small point, the mixed gas of surrounding is lighted by mixed gas combustion heat release.This
Kind single-point is lighted a fire so that fuel combustion is not unstable, rapid, incomplete.To, in entire combustion process, availableization of release
Learning energy irreversible loss includes that burning can be with the loss of energy (being discharged in the form of high-temp waste gas) and gas to casing wall heat transfer.As a result,
Pollution is generated to environment, and wastes valuable fuel.
Different from vapour oil and gas internal combustion engine, diesel engine uses oil spout after air high pressure warming to catch fire, combustion
Burning face starts wider, and fuel efficiency and mechanical output and power increase, but to increase mechanicalness noise, and discharge coal smoke
(PM2.5 main source) and nitrogen oxides (NOx).Due to being that oil spout is caught fire, oil gas cannot be sufficiently mixed, and also limit fuel oil effect
The raising of rate.
Since the physical characteristic of different fuel is different, different igniting is generally used using the engine of different fuel
Mode and electronic spark advance time.It is same to choose energy for compromise in even dual fuel engine, and the fuel similar in two kinds of properties
When meet igniting require the electronic spark advance time.
Change sparking mode to usually require to change engine structure accordingly.The price of one diesel car is higher by year-on-year vapour
Petrol car 20%, because diesel internal combustion engine needs to bear the air pressure and higher temperature bigger than petrol engine,
Higher to the material requirements of its internal combustion engine and injection system, cylinder needs thicken.The increased weight of automobile also makes fuel oil
Mileage benefit is controlled.
The newly developed compression automatic ignition engine of Axela Inc. (104047766 A of CN), using homogeneous charge compression-ignition
Igniting (homogeneous charge compression ignition, HCCI) combustion system, attracts wide attention.
HCCI combustion mode, which refers to, is pre-mixed the combustion system that the premixed gas that fuel and air obtain passes through compression automatic ignition.It should
Combustion system combines the advantage of spark ignition and compression ignition respectively, and to combustion position is improved, promoting energy efficiency has significantly
Advantage.But duration of ignition control is a difficult point for HCCI, because it is difficult to ensure that compressed gas temperature is increased to spontaneous combustion temperature
The time of degree.Before Axela Inc., GM Group (CN101454551B) He Feng electricity group (CN100416058C) also needle
Research was carried out to HCCI, but the HCCI automobile of only Axela Inc. is successfully entered market at present.
Homogeneous charge electromagnet igniting (the homogeneous charge electromagneti of the utility model
Ignition, HCEMI) use electromagnetic wave as ignition energy source, because wave frequency is determined by cylinder resonance frequency.It is homogeneous to fill
Electromagnet igniting and above-mentioned spark ignition are measured, compression-ignition is compared with homogeneous charge compression-ignition, is had the advantages that and 1) is fitted
For existing spark ignition engine, without being transformed for electromagnet igniting to engine or double teeming；2) it realizes
Lean burn can be such that efficiency of combustion greatly improves, and in the case where internal combustion engine acting mileage is constant, significantly reduce combustion
Material consumption；3) pollutant emission is reduced；3) shorten burning time, reduce irreversible energy loss；4) it burns more stable controllable；
5) power and automobile cost performance of internal combustion engine are improved, it is long with no cremate noise, contactless wastage, high reliablity, service life
And the competitive advantages such as standing charges are low, and the expense of automobile cooling system, tail gas catalyzing unit and particulate filter will be obvious
It reduces；6) practicability is high, may be directly applied to uniform-charge Otto-engine, it can also be used to natural gas, compression or liquefied natural gas, liquefaction stone
Oil gas engine, including the dual-purpose machine of double fuel and fuel combination machine.
In recent years, many researchs both at home and abroad, which have been contemplated that, introduces ignition of internal combustion engine technology neck for electromagnet firing technique
Domain, utility model people have found in the process of implementing the utility model:
Since in ignition of internal combustion engine system, the frequency of cylinder is unfixed, because the electromagnetic wave that cylinder is formed is humorous
The geometry of vibration chamber is irregular and since piston motion is changing always, the frequency of oscillation that do not fix.But existing electricity
It is all made of magnetron in magnet firing technique as electromagnetic wave source part, and generates the magnetron output of electromagnetic wave based on resonance principle
The frequency of electromagnetic wave is fixed 2.45GHz.This fixed frequency is not particularly suited for different model popular currently on the market
Engine, may deviate the cylinder resonance frequency of engine igniting time, so that cylinder be made to be in detuning state, field strength drop
Low, ignition effectiveness is lower, limits the practical application of electromagnet firing technique.
Utility model content
In view of this, the application provides a kind of Fuel-air premixing homogeneous charge electromagnet ignition type internal combustion
And ignition method, the homogeneous charge electromagnet sparking mode which takes can generate and current electronic spark advance
The consistent electromagnetic wave of cylinder resonance frequency under angle guarantees that ignition timing and electromagnetic coupling and resonance opportunity are almost the same, from
And the probability that resonance occurs greatly improves, ignition success rate is also accordingly greatly enhanced, and can solve existing electromagnet point
The not high problem of the ignition success rate of ignition technique realizes that the Fuel-air of internal combustion engine is pre-mixed homogeneous charge electromagnet point
Fire.
In order to solve the above-mentioned technical problem, a kind of technical solution of the application are as follows: homogeneous charge electricity of Fuel-air premixing
Magnet ignition type internal combustion, including control unit of engine, electromagnetic wave source, coupling unit and cylinder.Coupling unit and electricity
Magnetic wave source is connected with cylinder, and by the generation of control unit of engine control electromagnetic wave, ignition timing is determined by control unit of engine
Fixed, igniting occurs when wave frequency is consistent with casing housing resonance frequency at that time.The electromagnetic wave that electromagnetic wave source issues
Frequency is adjustable.It is constant due to maintaining internal combustion engine mechanical mechanism and geometry, it is suitable for all based on spark ignition
Engine, have versatility.Meanwhile fuel-air is pre-mixed, and the burning point due to lighting a fire independent of fuel, Ke Yishi
For pluralities of fuel, fuel includes but is not limited to gasoline, diesel oil, natural gas.
Fuel has been pre-mixed before ignition with air.
The wave frequency that electromagnetic wave source issues is adjustable as and the point using the electromagnet ignition type internal combustion
The corresponding cylinder resonance frequency of fiery degree of advance is consistent, and cylinder resonance frequency is by cylinder shape and is filled in the air-fuel of cavity and mixes
Gas codetermines.
The electromagnetic wave power that electromagnetic wave source issues is not less than 100 watts and is not higher than 200 watts.
The wave frequency that electromagnetic wave source issues is within the scope of international public frequency band:
900MHz-949MHz, 2.4GHz-2.5GHz or 5GHz-5.825GHz, in order to avoid the interference to normal communication frequency range.
For communication, 900MHz allows bandwidth for 26M, a channel, for example from 902 to 928, calculates a channel；
2.4GHz bandwidth is 22MHz, and one shares 14 channels；5GHz is increasingly complex, and not necessarily, Australia is to major part for usual various countries
Frequency range provides power in 500mw or less (https: //en.wikipedia.org/wiki/List_of_WLAN_channels#
900_MHz_(802.11ah)。
The 5500-5745 of China, 5G frequency range is unshared, and 5035-5170 is unshared.In addition, domestic, 430MHz-
440Mhz, 868-915MHz also belong to public.For communicating, the most of local regulations of radiant power, but can not above 1W
Permit to improve power with purchase；These power regulations are directed to non-frequency sweep equipment.
Control unit of engine monitors gas engine piston movement position, according to the degrees of ignition advance of setting, when interior
Burn engine piston reaches setting position, and the order for generating electromagnetic wave is sent to electromagnetic wave source.
Setting position is located at before degrees of ignition advance.Degrees of ignition advance embodies the duration of ignition, therefore, to electromagnetic wave
Source sends the order for generating electromagnetic wave, and than actual ignition degree of advance to shift to an earlier date some times more excellent, more can guarantee in piston after reforwarding
When dynamic, cylinder resonance frequency is consistent with the wave frequency that electromagnetic wave source is sent.
The degrees of ignition advance of engine start machine control unit setting, is determined by revolving speed high in internal combustion engine.
The degrees of ignition advance of engine start machine control unit setting, is determined by following methods:
A, corresponding to meet CA50 (50% fuel is in detection under high revolving speed according to the range of speeds of internal combustion engine
Through completing crank angle when burning) in -5 ° of top dead centre of degrees of ignition advance；
B, corresponding cylinder resonance frequency is calculated according to degrees of ignition advance, and calculates the detuning preceding piston position of electromagnetism wave resonance
It sets.
Electromagnetic wave source includes power supply, electromagnetic wave signal generation source circuit and power device, and power supply and electromagnetic wave signal occur
Simultaneously to electromagnetic wave signal source circuit power supply occurs for source circuit connection, and electromagnetic wave signal occurs source circuit and connect with power device, electricity
The frequency that the electromagnetic wave that source circuit issues occurs for magnetostatic wave signal is adjustable.
Electromagnetic wave signal occurs source circuit and uses feedback oscillating circuit.Feedback oscillating circuit includes LC oscillating circuit, crystal
Pipe oscillator etc..
Electromagnetic wave signal occur source circuit at least one, electromagnetic wave signal occur source circuit be one when, power device is
Power amplifier；When electromagnetic wave signal generation source circuit is that two or more are in parallel, power device is power combiner.Function
Rate synthesizer is the electromagnetic wave progress phase that the electromagnetic wave signal in parallel for two or more occurs that source circuit respectively generates
Position adjustment processing, keeps the phase of multiple electromagnetic waves identical.The wave frequency phase that multiple electromagnetic wave information transmitting source circuits issue
Together, in order to guarantee output power, multiple electromagnetic wave signals need its phase identical when being added, it is therefore desirable to power combiner.
Feedback oscillating circuit realizes the electromagnetism wave frequency that feedback oscillating circuit issues using adjustable condenser or/and adjustable coil
Rate is adjustable.
The power supply is Vehicular direct-current power supply.
The semiconductor devices that the power device uses includes transistor and/or field-effect tube.
Optionally, it includes feedback oscillating circuit that source circuit, which occurs, for the electromagnetic wave signal, and the feedback oscillating circuit uses
Semiconductor devices include and be not limited to avalanche diode, bulk-effect diode, bipolar transistor, field-effect tube and/or transverse direction
Diffused metal oxide emiconductor.
The electromagnetic wave source further includes radiator and/or temperature-compensation circuit, radiator and/or temperature-compensation circuit
It is connect with power device, the heat that radiator is used to generate the power device carries out radiating treatment, temperature-compensation circuit
For carrying out temperature-compensating to the power device.
The electromagnetic wave source further includes booster circuit, booster circuit is connected to power supply and electromagnetic wave signal occur source circuit it
Between.When booster circuit is less than certain voltage value for power supply, boosting processing is carried out to the voltage of the power supply, so that the electromagnetism
Wave signal generating source circuit generates power not less than 100 watts and is not higher than 200 watts of electromagnetic wave.
When supply voltage is less than setting voltage value, booster circuit starting.
Coupling unit connects electromagnetic wave source and cylinder, and coupled antenna is arranged on cylinder spark plug interface, and a part protrudes into
Into casing housing, the shape and size and cylinder spark plug Interface Matching of coupled antenna.
Coupling unit includes coupled antenna, is connect with transmission line.
The inside dimension of the transmission line is directly configured according to the equivalent input impedance or geometry of the cylinder.
The main resolved impedance spectroscopy matching problem of set-up mode.The different shape of antenna causes its output impedance to change.And coaxial line impedence one
As at 50 or 75 ohm.Impedance matching requirements input and output impedance is identical, and common method is one resistance of serial or parallel connection.
Transmission line includes center conductor, insulating layer and outer contact, and center conductor is located at the center of transmission line, insulation
Layer is around center conductor and coats center conductor, and outer contact is coaxially around center conductor and coats insulating layer.Three layers it
Between it is very close to each other.
The coupled antenna, including center antenna and outer antennas, the outside of the centrally disposed antenna of outer antennas.
Center antenna is the extension of center conductor, and outer antennas is that some or all of outer contact extends.
According to the thickness of the radius and insulating layer of the equivalent input impedance of cylinder or geometry setting center conductor.
Coupled antenna and the surface of insulating layer covering of transmission line junction have the dielectric of transmitted electromagnetic wave ability heat-insulated
Material.
The outer antennas, at the closed arrangement of array, constitutes side-closed on the extending direction of the outer contact,
Top keeps open architecture, and the center antenna is surrounded (outer antennas is ring structure) or outer antennas in the outer layer
It at array dispersed distribution on the extending direction of conductor, constitutes side and opens, top keeps open structure, around the center
Antenna.Outer antennas is claw-type structure.
The transmission line is coaxial transmission line or waveguide, and electromagnetic wave source is docked by transmission line with coupled antenna.
The utility model also provides a kind of electromagnet ignition method, is applied to Fuel-air and is pre-mixed homogeneous charge electromagnetism
In body ignition type internal combustion, comprising:
Control unit of engine monitors gas engine piston position, when piston reaches according to preset degrees of ignition advance
Determining predetermined position, control unit of engine send the life generated with the consistent electromagnetic wave of cylinder resonance frequency to electromagnetic wave source
It enables, electromagnetic wave source generates electromagnetic wave according to the order and electromagnetic wave is sent to coupled antenna by transmission line, and coupled antenna will
Electromagnetic wave is input in casing housing, is generated in cylinder cavity and is lighted a fire after generating strong electrical field after resonance amplifies.The intensity of the electric field is big
In the critical electric field strength lighted a fire.
Optionally, the power of the electromagnetic wave of the generation not less than 100 watts and is not higher than 200 watts, and the electromagnetic wave quilt
The electric field strength generated after resonance amplification reaches 106Volt/rice magnitude.
Optionally, predetermined position is located at before piston arrival degrees of ignition advance.
The electromagnetic wave source of the utility model embodiment directly can be powered generation electricity by Vehicular direct-current power supply first
Magnetic wave can efficiently use Vehicular direct-current power supply, reduce the cost of implementation of electromagnet ignition type internal combustion；And existing magnetic
Keyholed back plate needs additional configuration high-tension transformer to guarantee enough high drives when generating electromagnetic wave, increase cost of implementation.
Secondly, the frequency for the electromagnetic wave that the electromagnetic wave source of the utility model generates is controllable, either what fuel
Internal combustion engine, available different degrees of ignition advance and corresponding cylinder resonance frequency, and generate and current point
The consistent electromagnetic wave of cylinder resonance frequency under fiery degree of advance guarantees that ignition timing and resonance opportunity are almost the same, to send out
The probability of raw resonance greatly improves, and ignition success rate is also accordingly greatly enhanced, and the detuning time is very short (can almost to neglect
Slightly disregard).And the frequency for the electromagnetic wave that the magnetron that the existing technology using electromagnet igniting uses generates is fixed
2.45GHz, but engine cavity resonance frequency cannot be guaranteed to be fixed on 2.45GHz.Therefore, the electricity that existing magnetron generates
The probability of the cylinder resonance frequency of the frequency departure time of ignition of magnetic wave is very big, and it is longer that cylinder is in detuning state for time, is losing
In the state of humorous, field strength can be reduced with the aggravation of detuning state, so being to be difficult igniting successfully under detuning state.
Again, the coupling unit of the utility model is available to best with the equivalent input impedance of internal combustion engine cylinder
The output impedance of cooperation improves the successful probability of igniting so that electromagnetic wave energy reflection be minimized.Electromagnetism is inputted in this way
The power of wave does not need to be higher than 200 watts, can reliable ignition.
Finally, the embodiment of the utility model can accurately control the time of electromagnet igniting, electricity is inputted in the specific time
Magnetic wave, therefore just generation plasma makes electric field it is possible to prevente effectively from electromagnetic wave causes because inputting in advance before resonant ignition
Strength reduction.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present application, constitutes part of this application, this Shen
Illustrative embodiments and their description please are not constituted an undue limitation on the present application for explaining the application.In the accompanying drawings:
The block diagram of the homogeneous momentum electromagnet ignition type internal combustion of Fig. 1 the utility model embodiment；
Fig. 2 is the amplification diagram of the coupling unit of the first open architecture of the utility model embodiment；
Fig. 3 is the amplification diagram of the coupling unit of second of open architecture of the utility model embodiment；
Fig. 4 is electric field strength three of the combination of the first coupling unit and cylinder of the utility model embodiment in resonance
Tie up contour nomogram(-raph)；
Fig. 5 is electric field strength arrow of the combination of the first coupling unit and cylinder of the utility model embodiment in resonance
Amount distribution diagram；
Fig. 6 is electric field strength three of the combination of second of coupling unit and cylinder of the utility model embodiment in resonance
Tie up contour nomogram(-raph)；
Fig. 7 is electric field strength arrow of the combination of second of coupling unit and cylinder of the utility model embodiment in resonance
Amount distribution diagram；
Fig. 8 is the flow chart of the ignition of internal combustion engine method of the utility model embodiment；
Fig. 9 is the internal combustion engine structural schematic diagram of the utility model embodiment；
Figure 10 is the first electromagnetic wave source structural schematic diagram of the utility model embodiment；
Figure 11 is electromagnetic wave signal occurring source schematic diagram in the first electromagnetic wave source structure of the utility model embodiment；
Figure 12 is second of electromagnetic wave source structural schematic diagram of the utility model embodiment；
Figure 13 is a realization circuit of the feedback oscillating circuit of bipolar transistor；
Figure 14 is a realization circuit of GaAs metal-semiconductor field effect pipe oscillating circuit；
Figure 15 is DC voltage booster circuit；
Figure 16 is the relative dielectric constant of the lower three kinds of fuel of different air-fuel ratios；
Figure 17 is fuel combustion speed under different rotating speeds.
Specific embodiment
Presently filed embodiment is described in detail below in conjunction with accompanying drawings and embodiments, how the application is applied whereby
Technological means solves technical problem and reaches the realization process of technical effect to fully understand and implement.
In the utility model, for generating the electromagnetic wave source of electromagnetic wave, frequency is controllable, is easy the hair according to concrete application
Motivation structure and propellant composition determine that the cylinder resonant frequency under degrees of ignition advance is configured.Therefore in the utility model
Homogeneous premixing electromagnet ignited internal combustion engine has versatility.
And once engine model and propellant composition determine, the igniting of fixed ignition degree of advance can be used in engine, with mesh
Preceding spark ignition engine is similar, and fixed ignition degree of advance is set as engine and runs on high speed area, and low in engine
Fast area, there are light knock phenomenons.
For electromagnet ignition type internal combustion, the selection of fixed ignition degree of advance need to take into account air-fuel ratio variation and
Piston motion controls precision.Air-fuel ratio changes the relative dielectric constant that will affect air-fuel mixture body.Air-fuel ratio as shown in Figure 16
Change the influence to mixed gas relative dielectric constant, so as to obtain the air-fuel of one timing of degrees of ignition advance according to emulation
Than the variation range for changing corresponding resonant frequency.Consider further that piston motion, due to different engine correspond to it is different
Piston movement speed, theoretically, each different revolving speed have the corresponding piston position of an Optimum spark advance angle degree, so that
When piston motion near top dead center (- 5 °), just 50% fuel (CA50) has been completed to burn.It is provided by Figure 17 solid
Determine under degrees of ignition advance, the fuel combustion proportionate relationship of different rotating speeds.Suitable degrees of ignition advance is selected, so that revolving speed becomes
When change, the corresponding shaft angle of CA50 is in the range of 360 ° -5 °.
Also need the sensitivity in view of cylinder resonant frequency to piston motion to different location, i.e., after resonance generates,
Piston move again how long can generate it is detuning.According to simulation result, piston is bigger further away from top dead centre, i.e. degrees of ignition advance, humorous
Vibration frequency is more insensitive to piston motion.Finally, the influence of comprehensive air-fuel ratio, revolving speed and piston motion to resonance frequency, is selected
Suitable fixed ignition degree of advance.
The application scenarios of lower the utility model are described below:
As shown in figure 9, showing for the structure that a kind of Fuel-air is pre-mixed homogeneous charge electromagnet ignition type internal combustion
It is intended to.Engine structure has intake valve, air outlet valve, piston as shown in the figure, there is cylinder, and piston moves in cylinder, signified in figure
The position that piston position, that is, piston motion arrives.The automotive fuel can be gasoline, be also possible to natural gas or diesel oil, use
The internal combustion engine of high electric field pulse plug ignition is suitable for this patent.
As shown in Figure 1, electromagnet ignition system B, including control unit of engine E, electromagnetic wave source B1 and coupling unit B4
And cylinder C etc..Electromagnetic wave source is connected with the transmission line B2 in coupling unit, and coupling unit is by coupled antenna B3 and transmission line
B2 composition, coupling unit form the EMR electromagnetic resonance structure of similar capacitor, inductance, i.e. cylinder electromagnetic wave with internal combustion engine cylinder C
Cavity.Control unit of engine E monitors current internal combustion engine revolving speed, and in the igniting for reaching the internal combustion engine revolving speed
It notifies electromagnetic wave source B1, electromagnetic wave source B1 to generate electromagnetic wave when degree of advance and coupled antenna is transmitted to by coaxial transmission line B2
Electromagnetic wave energy coupled transfer is finally entered cylinder electromagnetic wave cavity C by B3, sends out electromagnetic wave using cylinder electromagnetic wave cavity C
Raw resonance；Wherein, the coupled antenna B3 of similar ordinary electromagnetic wave antenna is located at cylinder electromagnetic wave cavity C spark plug interface, outside
Shape size is identical as corresponding gasoline internal combustion engine spark plug, is made of any high-temperature and high-presure resistent conductor.It needs to illustrate
It is that dual valve internal combustion engine shown in Fig. 9 is one in numerous application examples of the utility model, targeted interior of this programme
Burn engine structure is not limited to this, and this programme can also be applied to other kinds of more valve internal combustion engines, such as Four valve
Internal combustion engine, five valve internal combustion engines etc..Electromagnetic wave source B1 in this programme is generally microwave source, generated electricity
Magnetic wave is generally microwave, and certain the utility model is not limited to this.
The design principle of lower the utility model is described below:
The basis of the utility model igniting is to allow electromagnetic wave that resonance occurs in cylinder, and this requires input electromagnetic wave and vapour
The frequency of cylinder is unanimously to occur resonance.
But the frequency of cylinder is to be not fixed, that is to say, that the movement of piston will cause the frequency of cylinder electromagnetic wave cavity C
Rate variation, and the variation of this frequency is continuously, to generate the corresponding relationship of the frequency of piston position and cylinder, to pass through difference
The corresponding different piston position of degrees of ignition advance, obtains the corresponding relationship of degrees of ignition advance Yu cylinder resonance frequency.This
A corresponding relationship is to precalculate out, if cylinder shape and fuel type determine.And degrees of ignition advance is according to combustion
Expect type and burning time, predefines so that fuel combustion is more than half when piston is run to -5 ° of regions.Finally, for each
Different engines and fuel determine corresponding degrees of ignition advance and cylinder electromagnetic wave cavity resonance frequency.
And the frequency of the electromagnetic wave that existing magnetron generates be it is fixed, when the frequency departure time of ignition of electromagnetic wave
When cylinder resonance frequency, cylinder is in detuning state, and in the state of detuning, field strength can be dropped with the aggravation of detuning state
It is low, so being to be difficult igniting successfully under detuning state.
So the utility model will complete the purpose for allowing electromagnetic wave that resonance occurs in cylinder, then the utility model is necessary
The sport technique segment to be completed is to generate the controllable electromagnetic wave of frequency, so that the cylinder resonance frequency of the frequency of electromagnetic wave and time of ignition
The consistent probability of rate maximizes.
It is aided with such sport technique segment: Best Coupling at the same time it can also which part occurs in electromagnetic transmission --- it will input
Low power electromagnetic wave, is coupled into cylinder in a manner of most preferably, and it is minimum to make reflection, while can assist electric field after increase resonance
The amplification factor of intensity.
Simultaneously to guarantee that electric field strength after resonance is more than the critical point of igniting, electromagnetic wave power need not less than 50dBm or
100 watts.
The core idea of lower the utility model is described below:
Usually, the revolving speed of the internal combustion engine of automobile is generally 650 revs/min to 7200 revs/min of range,
Under every kind of revolving speed within the scope of this, the position of time of ignition piston is different, i.e., degrees of ignition advance is different；Together
When, under same rotational speed, the degrees of ignition advance of natural gas engine generally than the angular advance 8-10 degree of gasoline engine,
If it is dual fuel engine, degrees of ignition advance is than gasoline engine angular advance but is later than natural gas engine.
The utility model detects previously according to the range of speeds of internal combustion engine and corresponding meets CA50 under every kind of revolving speed
In -5 ° of top dead centre of degrees of ignition advance；Further, according to degrees of ignition advance, calculate corresponding cylinder resonance frequency and
The piston motion range allowed before reaching detuning.
Corresponding relationship between the range of speeds based on internal combustion engine established above and degrees of ignition advance range, with
And the corresponding relationship between degrees of ignition advance and the cylinder resonance frequency, so as to predefine consolidating for internal combustion engine
Determine degrees of ignition advance and the corresponding cylinder resonance frequency of the degrees of ignition advance, setting electromagnetic wave source generates and the cylinder
The consistent electromagnetic wave of resonance frequency.In internal combustion engine actual motion, generated by control unit of engine notice electromagnetic wave source preparatory
The electromagnetic wave of frequency is set, since the frequency of this electromagnetic wave and the cylinder resonance frequency of time of ignition are consistent, and there is foot
Enough big energy, the electric field strength that the electromagnetic wave generates after being amplified in cylinder by resonance are greater than the critical electric field lighted a fire
Intensity.
Theoretically, the frequency of the electromagnetic wave as caused by the utility model is controllable, so either what is fired
The internal combustion engine of material, degrees of ignition advance and corresponding cylinder resonance frequency under available different rotating speeds, and produce
The raw consistent electromagnetic wave of cylinder resonance frequency under current degrees of ignition advance.
But in practical applications, the cylinder resonance frequency under the frequency of the electromagnetic wave of generation and current degrees of ignition advance
Rate can a little deviation, therefore selecting in the practical application of the utility model wave frequency is to be considered as deviation range,
So that as long as piston slightly continues to move a little distance, it is ensured that delayed when by very short, the frequency of electromagnetic wave
Will necessarily be consistent with cylinder resonance frequency, it so that resonant ignition success occur, ignore the detuning time very short (almost can
Disregard), to guarantee that ignition timing and resonance opportunity are almost the same, ignition success rate is greatly improved.And existing
The frequency for the electromagnetic wave that magnetron generates be it is fixed nonadjustable, therefore, the frequency for the electromagnetic wave that existing magnetron generates is inclined
The probability of cylinder resonance frequency from time of ignition is very big, and it is longer that cylinder is in detuning state for time, in the state of detuning, field
It can be reduced with the aggravation of detuning state by force, so being to be difficult igniting successfully under detuning state.
The solution of Best Coupling:
There are output impedances for coupling unit, and there are input impedances for cylinder itself.In the ideal situation, coupling unit is defeated
Impedance is consistent with the equivalent input impedance of cylinder out, and the energy of electromagnetic wave will not reflect at this time, and electromagnetic wave energy can be complete
Into cylinder.
But in practical applications, due to the irregular shape of cylinder, the equivalent input impedance of cylinder is not a fixation
Numerical value, it may be possible to the curve of a variation and be difficult accurately to obtain, these lead to the output impedance and cylinder of coupling unit
Equivalent input impedance is difficult to be consistent.Therefore, if using ordinary antennas, after electromagnetic radiation enters cylinder, energy can reflect
Coupling unit is returned, will be decayed into the energy of cylinder in this way, output impedance must be more bad with input resistant matching, reflection
Bigger, the decaying that energy enters cylinder is more severe.
And output impedance can be determined by the structure of coupling unit, so the coupling unit structure of the utility model with it is interior
The equivalent input impedance curve fitting of the cylinder of burn engine is by electromagnetic wave energy maximum coupling input cylinder, to improve electromagnetism
The reliability of wave and electromagnetic field ignition.The power for inputting electromagnetic wave in this way does not need to be higher than 200 watts, typically enters power and reaches
100 watts can successful ignition.
It is illustrated below with electromagnet ignition type internal combustion of the embodiment to the utility model.
As shown in Figure 1, electromagnet ignited systems B, comprising: control unit of engine E, electromagnetic wave source B1, coupling unit
B4, coupling unit B4 include transmission line B2 and coupled antenna B3.Electromagnet ignited systems B is exported to cylinder electromagnetic wave cavity C
Driving engine mechanical part D operation after electromagnet igniting, vehicle power supply A are electromagnet ignited systems B power supply.
As shown in figure 9, time of ignition is described to start firstly, before ignition, fuel has been pre-mixed before ignition with air
Machine control unit E monitors current gas engine piston movement position, according to the degrees of ignition advance currently set, gives institute
It states electromagnetic wave source B1 and sends the notice for generating electromagnetic wave, the notice should shift to an earlier date some times than actual ignition degree of advance, with
Guarantee when piston continues movement, the wave frequency that the resonant frequency of cylinder electromagnetic wave cavity C can be sent with electromagnetic wave source B1
Unanimously；
The electromagnetic wave source B1 after being connected to the signal for generating electromagnetic wave, is generated consistent with the cylinder resonance frequency at once
Electromagnetic wave, and generation is sent to coupling unit B4 with the consistent electromagnetic wave of cylinder resonance frequency；
The coupling unit B4, for cylinder electromagnetic wave chamber will to be input to the consistent electromagnetic wave of cylinder resonance frequency
Body C, so that the electromagnetic wave, which generates electric field strength after generating resonance in cylinder and being amplified, is greater than the critical electricity lighted a fire
The electric field of field intensity, wherein the energy for the electromagnetic wave that coupling unit B4 emits into cylinder is not higher than 200 watts not less than 100 watts；
The part of the spark plug interface for probeing into cylinder of the coupling unit B4 (mainly probes into the spark plug of the cylinder
The space that insulating layer, outer antennas and center antenna in the fractional transmission line of interface surround) and cylinder electromagnetic wave cavity C, structure
At electromagnetic wave cavity resonator, the electric field strength generated after amplifying the electromagnetic wave in cylinder by resonance is faced greater than what is lighted a fire
Boundary's electric field strength, the electric field strength that resonant cavity generates after amplifying electromagnetic wave by resonance reach 106Volt/rice magnitude.
It is illustrated below with electromagnet ignition method of the embodiment to the utility model.
As shown in figure 8, the flow chart of the ignition of internal combustion engine method for the utility model embodiment, comprising:
Step 100, current gas engine piston movement position is monitored, according to the degrees of ignition advance currently set,
The notice for generating electromagnetic wave is sent to the electromagnetic wave source B1, the notice time will shift to an earlier date in degrees of ignition advance；
Step 200, electromagnetic wave source generates and the cylinder resonance frequency according to the cylinder resonance frequency for including in the notice
The consistent electromagnetic wave of rate.
Wherein, the power (energy) of the electromagnetic wave of generation is not less than 100 watts, and is not higher than 200 watts；
Step 300, generation is sent to coupling unit with the consistent electromagnetic wave of cylinder resonance frequency by electromagnetic wave source；
Step 400, the electromagnetic wave is input to cylinder by coupling unit, so that the electromagnetic wave generates resonance in cylinder
And the electric field that electric field strength is greater than the critical electric field strength lighted a fire is generated after being amplified；
Wherein, the electric field strength generated after electromagnetic wave is amplified by resonance reaches 106Volt/rice magnitude.
The electromagnetic wave source for including in the utility model electromagnet ignition type internal combustion is carried out with an embodiment below
Explanation.
Electromagnetic wave source provided by the embodiment of the utility model include: DC power supply, electromagnetic wave signal occur source circuit and
Power device；
Wherein, the DC power supply is the vehicle power supply of the electromagnet ignition type internal combustion, is the electromagnetism
Wave source provides DC power supply, and voltage needed for source circuit provides generation electromagnetic wave occurs for electromagnetic wave signal；
Source circuit occurs for the electromagnetic wave signal for generating the controllable and stable electromagnetic wave of frequency, and the electricity of the generation
The degrees of ignition advance pair of current internal combustion engine revolving speed in the frequency of magnetic wave and the electromagnet ignition type internal combustion
The cylinder resonance frequency answered is consistent；Wherein, source circuit occurs for electromagnetic wave signal can be realized using feedback oscillating circuit；
The power device is used to the electromagnetic wave signal occur the electromagnetic wave that source circuit generates to carry out at power amplification
Reason or phase adjustment processing.
Optionally, in the utility model embodiment, if the voltage of the vehicle power supply is less than certain voltage value (such as 42V)
When, then the electromagnetic wave source further includes booster circuit, boosting processing is carried out for the voltage to the vehicle power supply, so that described
The electromagnetic wave that source circuit generates power not less than 100 watts and is not higher than 200 watts occurs for electromagnetic wave signal；
Optionally, electromagnetic wave source described in the utility model embodiment includes: one or more electromagnetic wave signals
Source circuit occurs；
If the electromagnetic wave source includes that source circuit occurs for an electromagnetic wave signal, the power device is power amplification
Device carries out power amplification processing for the electromagnetic wave that source circuit generates to occur to the electromagnetic wave signal；
If source circuit occurs for the electromagnetic wave signal that the electromagnetic wave source includes multiple parallel connections, the power device is function
Rate synthesizer, the electromagnetic wave that source circuit respectively generates, which occurs, for the electromagnetic wave signal for the multiple parallel connection carries out at phase adjustment
Reason, keeps the phase of multiple electromagnetic waves identical.
Optionally, electromagnetic wave source described in the utility model embodiment further include: radiator and/or temperature-compensating electricity
Road；Wherein, the heat that the radiator is used to generate the power device carries out radiating treatment；
The temperature-compensation circuit is used to carry out temperature-compensating to the power device.
Fig. 1 is the internal combustion engine of the utility model embodiment and the structural schematic diagram of ignition system, as shown in Fig. 1,
It should be pointed out that two embodiments below are only wherein there are many concrete methods of realizing of electromagnetic wave source
Two realization structures.
1) Figure 10 is a kind of structural schematic diagram of electromagnetic wave source of the utility model embodiment, as shown in Figure 10, electromagnetic wave
Source includes direct current supply, electromagnetic wave signal occurring source and power amplifying part.
The direct current supply is powered by onboard power system, if onboard power system is 12 volts of power supply systems, basis
Electromagnetic wave signal source different type decides whether to increase booster circuit.
Figure 15 provides DC voltage booster circuit basic principle, and power supply indicates to connect vehicle-mounted 12V low pressure, and control signal is opened for high frequency
Direct current input is become exchanging, then carries out boosting output by transformer by OFF signal, and Vout is to export after boosting in Figure 15
Alternating voltage.
Source circuit, which occurs, for the electromagnetic wave signal can use feedback oscillating circuit, the semiconductor that feedback oscillating circuit uses
Device includes and is not limited to avalanche diode, bulk-effect diode, bipolar transistor, field-effect tube, the oxidation of horizontal proliferation metal
Object semiconductor etc..
The semiconductor devices that power amplifier uses includes transistor and field-effect tube, such as GaAs-HEMT (GaAs-height
Electronics transfer rate transistor), GaN-HEMT (the high electronics transfer rate transistor of gallium nitride -), GaAs-MESFET (GaAs-gold
Category-semiconductor field), SiGe-HBT (silicon germanium heterojunction bipolar transistor), (heterojunction of indium phosphide is bipolar by InP-HBT
Transistor npn npn), GaAs-HBT (GaAs Heterojunction Bipolar Transistors), LDMOS (lateral diffusion metal oxide semiconductor)
Etc..Since semiconductor power device can generate certain heat, in order to guarantee that electromagnetic wave source output frequency is stablized, heat dissipation need to be increased
Device and temperature-compensation circuit.
Figure 11 is the schematic diagram of feedback oscillating circuit, is that one of a variety of circuits for generating electromagnetic wave signal are realized, appoints
The circuit what can produce electromagnetic wave signal all can serve as electromagnetic wave signal occurring source.As shown in figure 11, feedback oscillating circuit
Feedback voltage and former input voltage (output voltage that former input voltage here can be booster circuit) same to phase, by having
After Linear Amplifer semiconductor devices (amplifier), the output voltage amplitude of feedback oscillating circuit increases.When in feedback oscillating circuit
Feedback voltage amplitude be more than linearity of amplifier workspace after, output voltage gain reduce, final output voltage stabilization, so as to
With the electromagnetic wave signal that output frequency is stable.
How adjustable the frequency of the electromagnetic wave generated below to the feedback oscillating circuit of Figure 11 is is illustrated:
Figure 13 is a kind of realization circuit of feedback oscillating circuit, is a kind of feedback vibration of bipolar transistor as shown in figure 13
Swing circuit, wherein VEE and VCC is power supply, can be the output voltage of booster circuit, and Vout is the output voltage of electromagnetic wave.
Based on the working principle of LC oscillating circuit, it is connected after capacitor charging with coil, capacitor will discharge, and coil has resistance to electric current
Hinder effect, so that the quality factor Q value of resonance circuit is reduced gradually, and current amplification factor B slowly increases, so electric field energy turns
Magnetic field energy is turned to, to generate electromagnetic wave；Wherein, the frequency square and coil L and electricity for the oscillating current that oscillating circuit generates
Hold C to be inversely proportional, therefore can change the capacitor of capacitor or the electrodynamic capacity of coil, so that it may change the electromagnetic wave of generation
Frequency needs the wavelength of electromagnetic wave to shorten to generate the high electromagnetic wave of frequency according to the inverse relation between frequency and wavelength
A bit, then can be by the capacitor of reduction capacitor, or reduce the electrodynamic capacity in coil to realize.For example, reducing capacitor pole
The capacitor of plate positive area, capacitor becomes smaller, and the frequency of oscillation of coil is caused to become larger, then the wavelength of the electromagnetic wave generated shortens.
Figure 14 is that another realization circuit of feedback oscillating circuit is as shown in figure 12 GaAs MESFET oscillating circuit,
Working principle based on oscillating circuit, thus it is possible to vary the capacitor of capacitor or the electrodynamic capacity of coil, so that it may change and generate
Electromagnetic wave frequency, Vout be electromagnetic wave output voltage；
It should be noted that the feedback oscillating circuit of the utility model is not limited to above-mentioned realization circuit.
2) Figure 12 is the structural schematic diagram of another electromagnetic wave source of the utility model embodiment, and electromagnetic wave source includes direct current
Power supply, the electromagnetic wave signal occurring source of multiple parallel connections and power combing part.
The direct current supply is powered by onboard power system, if it is 42 volts of power supply systems, then according to electromagnetic wave signal source
Different type decides whether booster circuit.Several electromagnetic wave signal occurring sources, it is either one or more
Electromagnetic wave signal occurring source.As long as its output power can reach 100 watts or more, to electromagnetic wave signal occurring source is not needed
Number limits.The power combing part makes more the carry out phase modulation of the electromagnetic wave of multiple electromagnetic wave signal occurring sources output
A electromagnetic wave signal phase is identical.
Wherein, the electromagnetic wave signal occurring source of multiple parallel connections uses identical structure.Any electromagnetic wave signal of can produce
Circuit, including oscillating circuit shown in Figure 13 and Figure 14, all can serve as electromagnetic wave signal occurring source.The utility model is simultaneously unlimited
In above-mentioned realization circuit.
Below again with an embodiment to the coupling unit for including in the utility model electromagnet ignition type internal combustion into
Row explanation.
As shown in Figures 2 and 3, coupling unit, comprising: transmission line and the coupled antenna in the transmission line extending direction.
The center conductor 2 of the transmission line is in the central axis of the transmission line, and insulating layer 3 is around the central axis packet
The center conductor 2 is covered, outer contact 1 coats the insulating layer 3 around the central axis.The coupled antenna, comprising: in
Heart antenna 5 and the outer antennas 4 coaxial with the center antenna, wherein the center antenna 5 is that the center of the transmission line is led
The extension of body 2, and protrude into cylinder；The outer antennas 4 be the transmission line outer contact 1 extension, with column around
The center antenna 5 simultaneously protrudes into cylinder, and the quantity of the outer antennas 4 is not less than the center antenna 5.
Cylinder is divided into cylinder cover 9 and cylinder body 8, and piston moves in cylinder body 8, when moving near top dead center
When, electromagnetic wave energy can be coupled or be inputted into cylinder to carry out electricity by the coupling unit being connected with the spark plug interface of cylinder cover 9
Magnet igniting.
The coupled antenna and the transmission line have a common boundary in junction 6 and cylinder, and form resonant cavity together.When described exhausted
Edge layer use nonrefractory material when, the insulating layer junction 6 exposure surface covering have transmitted electromagnetic wave ability every
Hot material, the heat-barrier material can be ceramic material, and electromagnetic wave is transmitted by heat-barrier material into cylinder by insulating layer.Certainly,
When the insulating layer uses heat proof material, if insulating layer sheet is as ceramic material, then it is not necessarily to heat-barrier material.
The output impedance of coupling unit is determined by the radius of center conductor 2 and the thickness of insulating layer 3, therefore the utility model
According to the thickness of the radius and insulating layer 3 of the equivalent input impedance of cylinder or the center conductor 2 of geometry design coupling unit
With coupled antenna shape, reach the critical electricity generated with the input of the smallest electromagnetic wave and the smallest battery power consumption be more than needed for lighting a fire
Field intensity.
The installation dimension of coupling unit and the outer dimension of spark plug are consistent, outer diameter and the spark plug interface of coupling unit
Diameter is consistent.In actual operation, determine that outer layer is led by center conductor 2 and insulating layer 3 due to the output impedance of coupling unit
The outer diameter of body 1 is fixed, and the spark plug interface of cylinder can be adapted to by the shape of the outer contact 1 of the change transmission line
Shape, make the size of spark plug described in the size fit of the coupling unit so that the coupling unit is directly installed on cylinder
The spark plug interface of tops.
The geometry of antenna part is not only merely to be limited to shown example in coupling unit disclosed above, is appointed
The deformation what belongs to the design of the utility model belongs to the protection scope of the utility model.Come below by one group of experimental data
Support the technical effect and industrial applicibility of the utility model.
When being 1 watt in input power, steam-cylinder piston is when compression stroke shifts near top dead centre and passes through resonant ignition, cylinder top
Field distribution may refer to view:
Figure 4 and 5 are respectively electric field strength three of the combination of the coupling unit and cylinder of the first open architecture in resonance
Tie up contour nomogram(-raph) and electric-field intensity distribution diagram；
Fig. 6 and 7 is respectively electric field strength three of the combination of the coupling unit and cylinder of second of open architecture in resonance
Tie up contour nomogram(-raph) and electric-field intensity distribution diagram；
Table 2 be based on coupling unit structure shown in Fig. 2, with three kinds of outer antennas length (in Fig. 24 along central cylindrical
The length of axis direction) for, listing in input power is 1 watt-hour, and the electromagnetic wave of these three frequencies is generated in cylinder interior resonance
Electric field strength size, it is seen that minimum field strength is more than 1 × 105Volt/rice, that is to say, that if 100 watts of input, electric-field strength
Degree is i.e. up to 1 × 106Volt/rice.
And research has shown that the electric field strength of electromagnet igniting need to only reach 106Volt/rice magnitude can successful ignition.As a result,
Electric field strength when igniting is maintained on critical field strength using existing Vehicular accumulator cell.Produced by the utility model
Electric field strength can not only light the gaseous mixture thinner than 1:25, can also light propane (the liquefaction stone for being more difficult to light than gasoline
One of main component of oil gas).Meanwhile the coupling unit in the utility model is not limited to the parameter provided in table and structure
The electric field strength of cylinder top when the input of table 2. is 1 watt of power
Traditional theory thinks that the design structure of coupled antenna is mainly closely related with the wavelength of electromagnetic wave, and when coupling
Effect is best when antenna length is 1/4 wavelength, in this example when input power is that electric field strength caused by 1 watt-hour resonance is reachable
To 5.8 × 105Volt/rice.
However in the present invention, consider that cylinder is irregular chamber in practice using cylinder as the characteristics of resonant cavity
Body, occur resonance when electromagnetic field eigen mode and frequency then with the depth of cylinder (position of piston, piston position decision work as
The preceding depth of cylinder) it is inevitable related, therefore, the influence of cylinder depth is received between the design of coupled antenna structure.
It can be known by experiment simulation data, electromagnetic wavelength caused by the length and electromagnetic wave source of center antenna 5
It is related, resonant cavity (being cylinder in the utility model) depth at the time of wavelength and the resonance amplification of the electromagnetic wave are lighted a fire
It is related.The basic scope of the length L1 of the center antenna need to guarantee to be greater than zero and less than the cylinder cover depth of the cylinder
50%, while the length L1 of the center antenna will also be guaranteed at 1/3 of electromagnetic wavelength caused by the electromagnetic wave source
± 10% range.
The optimum range of the length L1 of center antenna 5 should be at 1/3 wavelength nearby (the generally 30%-35% of wavelength),
And the optimum range of the length L1 of center antenna 5 meets simultaneously near 30% in cylinder cover depth, and experiment confirms that L1 is
Wavelength 33.74% when effect it is best, in this example when input power be 1 watt-hour resonance caused by electric field strength can reach
1.18×106Volt/rice, considerably beyond the optimum resonance electric field strength on traditional theory.
The electromagnetic wave source of the utility model embodiment directly can be powered generation electricity by Vehicular direct-current power supply first
Magnetic wave can efficiently use Vehicular direct-current power supply, reduce the cost of implementation of electromagnet ignition type internal combustion；And existing magnetic
Keyholed back plate needs additional configuration high-tension transformer to guarantee enough high drives when generating electromagnetic wave, increase cost of implementation.
Secondly, the frequency for the electromagnetic wave that the electromagnetic wave source of the utility model generates is controllable, either what fuel
Internal combustion engine, available different degrees of ignition advance and corresponding cylinder resonance frequency, and generate with it is current
The consistent electromagnetic wave of cylinder resonance frequency under degrees of ignition advance guarantees that ignition timing and resonance opportunity are almost the same, thus
The probability that resonance occurs greatly improves, and ignition success rate is also accordingly greatly enhanced, the detuning time it is very short (almost can be with
It ignores).And the frequency for the electromagnetic wave that existing magnetron generates is to be fixed on 2.45GHz, therefore, existing magnetron produces
The probability of the cylinder resonance frequency of the frequency departure time of ignition of raw electromagnetic wave is very big, cylinder be in detuning state for time compared with
Long, in the state of detuning, field strength can be reduced with the aggravation of detuning state, so being to be difficult an igneous under detuning state
Function.
Again, the coupling unit of the utility model is available to best with the equivalent input impedance of internal combustion engine cylinder
The output impedance of cooperation improves the successful probability of igniting so that electromagnetic wave energy reflection be minimized.Electromagnetism is inputted in this way
The power of wave does not need to be higher than 200 watts, can reliable ignition.
Finally, the embodiment of the utility model can accurately control the time of electromagnet igniting, electricity is inputted in the specific time
Magnetic wave, therefore just generation plasma makes electric field it is possible to prevente effectively from electromagnetic wave causes because inputting in advance before resonant ignition
Intensity decline.
Several preferred embodiments of the present invention have shown and described in above description, but as previously described, it should be understood that this
Utility model is not limited to forms disclosed herein, and should not be regarded as an exclusion of other examples, and can be used for various
Other combinations, modification and environment, and above-mentioned introduction or related fields can be passed through within the scope of the inventive concept described herein
Technology or knowledge be modified.And changes and modifications made by those skilled in the art do not depart from the spirit and model of the utility model
It encloses, then it all should be in the protection scope of the appended claims for the utility model.
Claims (22)
1. a kind of Fuel-air is pre-mixed homogeneous charge electromagnet ignition type internal combustion, including control unit of engine, electricity
Magnetic wave source, coupling unit and cylinder, coupling unit connect electromagnetic wave source and cylinder, by control unit of engine control electromagnetic wave
It generates, which is characterized in that ignition timing is determined that igniting occurs in wave frequency and cylinder at that time by control unit of engine
Cavity resonant frequency is consistent.
2. electromagnet ignition type internal combustion according to claim 1, which is characterized in that electromagnet ignition type internal combustion hair
The sparking mode of motivation is suitable for pluralities of fuel, and fuel is gasoline or diesel oil or natural gas.
3. electromagnet ignition type internal combustion according to claim 1, which is characterized in that the electromagnetism that electromagnetic wave source issues
Wave power is not less than 100 watts and is not higher than 200 watts.
4. electromagnet ignition type internal combustion according to claim 1, which is characterized in that wave frequency adjustable range
For international public frequency band: 900MHz-949MHz, 2.4GHz-2.5GHz or 5GHz-5.825GHz.
5. electromagnet ignition type internal combustion according to claim 1, which is characterized in that electromagnetic wave source include power supply,
Source circuit and power device occur for electromagnetic wave signal, and power supply is sent out with electromagnetic wave signal occurring source circuit connection and to electromagnetic wave signal
The power supply of source of students circuit, electromagnetic wave signal occur source circuit and connect with power device, and the electricity that source circuit issues occurs for electromagnetic wave signal
The frequency of magnetic wave is adjustable.
6. electromagnet ignition type internal combustion according to claim 5, which is characterized in that electromagnetic wave signal occurring source electricity
Road uses feedback oscillating circuit.
7. electromagnet ignition type internal combustion according to claim 5, which is characterized in that electromagnetic wave signal occurring source electricity
Road at least one, electromagnetic wave signal occur source circuit be one when, power device is power amplifier；Electromagnetic wave signal occurring source
When circuit is that two or more are in parallel, power device is power combiner.
8. electromagnet ignition type internal combustion according to claim 6, which is characterized in that feedback oscillating circuit uses can
The wave frequency for adjusting capacitor or/and adjustable coil to realize that feedback oscillating circuit issues is adjustable.
9. electromagnet ignition type internal combustion according to claim 5, which is characterized in that the power supply is Vehicular direct-current
Power supply.
10. electromagnet ignition type internal combustion according to claim 5, which is characterized in that the power device uses
Semiconductor devices include transistor and/or field-effect tube.
11. electromagnet ignition type internal combustion according to claim 5, which is characterized in that the electromagnetic wave signal hair
Source of students circuit includes feedback oscillating circuit, and the semiconductor devices that the feedback oscillating circuit uses includes and is not limited to two pole of snowslide
Pipe, bulk-effect diode, bipolar transistor, field-effect tube and/or lateral diffusion metal oxide semiconductor.
12. electromagnet ignition type internal combustion according to claim 5, which is characterized in that the electromagnetic wave source also wraps
Radiator and/or temperature-compensation circuit are included, radiator and/or temperature-compensation circuit are connect with power device, radiator
Heat for generating to the power device carries out radiating treatment, and temperature-compensation circuit is used to carry out temperature to the power device
Degree compensation.
13. electromagnet ignition type internal combustion according to claim 5, which is characterized in that the electromagnetic wave source also wraps
Booster circuit is included, booster circuit is connected to power supply and electromagnetic wave signal occurs between source circuit.
14. electromagnet ignition type internal combustion according to claim 1, which is characterized in that coupling unit connects electromagnetism
Wave source and cylinder, coupled antenna are arranged on cylinder spark plug interface, and a part is extend into casing housing, the shape of coupled antenna
Shape and size and cylinder spark plug Interface Matching.
15. electromagnet ignition type internal combustion according to claim 14, which is characterized in that transmission line and coupled antenna
Connection.
16. electromagnet ignition type internal combustion according to claim 15, which is characterized in that transmission line is coaxial transmission
Line or waveguide.
17. electromagnet ignition type internal combustion according to claim 15, which is characterized in that the inside dimension of transmission line
It is configured according to the equivalent input impedance of the cylinder or geometry.
18. electromagnet ignition type internal combustion according to claim 15, which is characterized in that transmission line includes that center is led
Body, insulating layer and outer contact, center conductor are located at the center of transmission line, and insulating layer is in center conductor and cladding
Heart conductor, outer contact is coaxially around center conductor and coats insulating layer.
19. electromagnet ignition type internal combustion according to claim 15, which is characterized in that the coupled antenna includes
Center antenna and outer antennas, the outside of the centrally disposed antenna of outer antennas.
20. electromagnet ignition type internal combustion according to claim 19, which is characterized in that center antenna is that center is led
The extension of body, outer antennas are that some or all of outer contact extends.
21. electromagnet ignition type internal combustion according to claim 15, which is characterized in that coupled antenna and transmission line
The surface of insulating layer covering of junction has the dielectric heat-barrier material of transmitted electromagnetic wave ability.
22. electromagnet ignition type internal combustion according to claim 15, which is characterized in that the outer antennas is in institute
It states on the extending direction of outer contact into the closed arrangement of array, constitutes side-closed, top keeps open architecture, in described
Heart antenna surround or outer antennas on the extending direction of the outer contact at array dispersed distribution, it is open to constitute side,
Top keeps open structure, around the center antenna.
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