CN101397950A - Internal combustion engine including plasma generating device - Google Patents
Internal combustion engine including plasma generating device Download PDFInfo
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- CN101397950A CN101397950A CN 200810161705 CN200810161705A CN101397950A CN 101397950 A CN101397950 A CN 101397950A CN 200810161705 CN200810161705 CN 200810161705 CN 200810161705 A CN200810161705 A CN 200810161705A CN 101397950 A CN101397950 A CN 101397950A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
A plasma generating device for an internal combustion engine sets the generating-atmosphere pressure for generating plasma to the intake pressure, thereby achieving a reduction in the size, weight, and energy consumption of the plasma generating device and an improvement in combustibility. An internal combustion engine includes a throttle valve arranged in an intake passage having an intake opening that opens to a combustion chamber. An intake valve opens and closes the intake opening. A plasma generating device includes a plasma generator having a generating chamber for converting intake air into a plasma state to generate plasma. The plasma generating device supplies plasma to a downstream passage of the intake passage between the throttle valve and the intake valve. A gas control valve operates in conjunction with the throttle valve, and is arranged in an introduction passage between a clean chamber of the air cleaner chamber and a generating chamber.
Description
The cross reference of related application
The application requires the benefit of priority of Japanese patent application No.2007-26866 that submitted on September 25th, 2007 and the Japanese patent application No.2007-246867 that submitted on September 25th, 2007 according to 35USC119, and the whole contents of these two applications is incorporated in full at this by reference.
Technical field
The present invention relates to a kind of internal-combustion engine that comprises the plasma generating equipment that generates plasma.
Background technique
The internal-combustion engine that comprises plasma generating equipment is known by everybody, this plasma generating apparatus generates gas by discharge with plasma and converts plasma state to and contain the plasma of free radicals with generation, plasma generating equipment from its in the face of terminal part of firing chamber to firing chamber injected plasma.As see JP-A No.2006-316777 (Figure 11).
Known when generating plasma by plasma generating equipment, the indoor pressure (after this be called and generate barometric pressure) of the generation that plasma generated in plasma producing apparatus is low more, easy more generation plasma.Therefore, in the time of in plasma generating equipment is used for internal-combustion engine, can improve the plasma formation efficiency under the following situation: plasma can generate corresponding to the timing (timing) of air-fuel mixture igniting or under near the pressure of the compression pressure the compression top dead center of the timing before just lighting a fire in equaling the firing chamber, and perhaps plasma can generate under less than the generation barometric pressure that generates barometric pressure (this generation barometric pressure is equal to or higher than compression pressure).
Along with the raising of plasma formation efficiency, owing to be included in free radicals (radical) in the plasma, therefore can expect flammable raising.Further, can reduce size, weight and the energy consumption of plasma generating equipment.
Further, comprise that the internal-combustion engine of plasma generating equipment is known by everybody, this plasma generating apparatus uses waste gas (exhaust gas) to generate gas as plasma, and wherein the plasma of Sheng Chenging is supplied to the suction path.As see JP-A No.2004-340048.
Because plasma contains free radicals (radical), suck air or air-fuel mixture has improved combustibility so plasma added to.Yet,, that the intake that is inhaled into the suction air in the firing chamber is very big based on the operational state change of internal-combustion engine according to load required on the internal-combustion engine.Therefore, if the relative intake of amount of the plasma that generates is insufficient, be difficult in the big operating range of internal-combustion engine, to realize fully the effect that the combustibility that obtains by plasma improves.Further, also having a kind of situation is that the relative intake of amount of plasma is excessive.
Therefore, for the amount of the plasma of controlling generation, it is constant to make the plasma that imports to plasma generating equipment generate the gas flow of gas, so that control is used to generate the discharge voltage of discharge plasma is generated gas reforming and becomes plasma state.Yet; in this case, the plasma that does not change into plasma of existence generate gas can be so that the interior uniformity of proportions of ingredients (being air-fuel ratio) of air-fuel mixture between the air in being difficult to fuel metering and sucking the firing chamber to guarantee to mix.
Suction pressure in sucking path is used for plasma generated under the situation that gas imports to reaction chamber, because during the low load operation of internal-combustion engine, the aperture of throttle valve diminishes, the suction pressure step-down in throttle valve downstream (negative pressure become big), thus the plasma gas flow that generates gas trend towards excessive.On the other hand, because in the high loading operation period of internal-combustion engine, it is big that the aperture of throttle valve becomes, and the suction pressure in throttle valve downstream uprises (negative pressure diminishes), the gas flow that plasma generates gas trends towards deficiency, therefore cannot realize the effect by the combustibility raising of plasma acquisition fully.
Summary of the invention
Consider that said circumstances finished the present invention.An object of the present invention is to set to suction pressure and improve plasma formation efficiency in the internal-combustion engine that comprises plasma generating equipment by the generation barometric pressure that will be used to generate plasma, thereby realize reducing size, weight and the energy consumption of plasma generating equipment, and realize owing to plasma improves combustibility.
According to embodiments of the invention, sucking aspect the position that is supplied in the path at plasma, realize the increase of degrees of freedom, and simplified the structure of plasma generating equipment thus.
According to embodiments of the invention, realized the compact Layout of plasma generating equipment.
According to embodiments of the invention, internal-combustion engine comprises: suction device, this suction device have the throttle valve that is arranged in the suction path, and this suction path has the suction opening of opening to the firing chamber; Open and close the suction valve of suction opening; With plasma generating equipment with generation chamber, this generation chamber is used for that plasma is generated gas reforming and becomes plasma state to generate plasma, in this plasma generating apparatus, generate the chamber and be communicated with the suction path, and plasma generating equipment supplies to plasma the passage portion of the suction path between throttle valve and the suction valve.
According to embodiments of the invention, plasma generating equipment comprises the plasma generator capable that forms the generation chamber, and supplying pipe, this supplying pipe is connected to plasma generator capable, plasma imported to passage portion and passage portion to be communicated with plasma chamber always.
According to embodiments of the invention, it is the suction air that flows in sucking path that plasma generates gas, and plasma generator capable and supplying pipe are along sucking access arrangements.
According to embodiments of the invention, generating the chamber is communicated with the suction path, wherein generating indoor plasma at this generates in plasma generating equipment, in this sucks path, suction pressure is the pressure that is lower than near the compression pressure of the inherent compression top dead center in firing chamber, and therefore generating barometric pressure is substantially equal to suction pressure.Therefore, when being the situation of above-mentioned compression pressure when comparing, can improve the plasma formation efficiency, thereby can reduce the size and the weight of plasma generating equipment with generating barometric pressure.Further, generate barometric pressure, can reduce to be used to generate the energy consumption of plasma owing to hang down.
Further, because sucking air is raise by plasma heating and temperature, and the free radicals that also contains owing to plasma, so increased the combustibility of the air-fuel mixture in the firing chamber, thus realized that motor output increases and fuel efficiency improves.
According to embodiments of the invention, because supply with the plasma that generates by plasma generator capable by supplying pipe, so can easily change the layout of supplying pipe or to the joint of the supplying pipe that sucks path, thereby increase degrees of freedom aspect the passage portion of plasma supply unit in plasma generator capable and suction path.
Further, generate the chamber, be used to make the generation barometric pressure to reach the private access or the conduit of suction pressure so there is no need to establish, thereby simplified the structure of plasma generating equipment because the suction pressure in throttle valve downstream sends to by supplying pipe.
According to embodiments of the invention, because plasma generates air for sucking air, and plasma generator capable and supplying pipe are along sucking access arrangements, so plasma generator capable and supplying pipe can be arranged side by side with suction device, thus the compact Layout of permission plasma generating equipment.
Consider that said circumstances finished the present invention.Therefore, a purpose of embodiments of the invention is that control imports the flow that generates indoor plasma generation gas, to improve the effect of the combustibility raising that obtains by plasma thus, wherein indoor in this generation, plasma generates in comprising the internal-combustion engine of plasma generating equipment.
According to embodiments of the invention, gas control valve is operated with sucking control valve, to suppress to be generated by plasma the variation of the air-fuel ratio that the gas flow of air produces thus.
Further,, simplified the structure of plasma generating equipment, and the layout of suction device and plasma generating equipment is compact more according to embodiments of the invention.
According to embodiments of the invention, internal-combustion engine comprises: suction device, and this suction device comprises the suction control valve, this suction control valve control is inhaled into the intake of the suction air in the firing chamber by the suction path; And plasma generating equipment, this plasma generating apparatus has and is used for that plasma is generated gas reforming and becomes plasma state to generate the generation chamber of plasma, in this plasma generating apparatus, plasma generating equipment comprises the gas flow control device that is used for generating according to required Load Control plasma the gas flow of gas, and this plasma generating apparatus supplies to the suction path with plasma.
According to embodiments of the invention, it is that plasma generates air that plasma generates gas, it is the internal-combustion engine air outside that this plasma generates air, or the suction air of suction control valve upstream, gas flow control device is formed by gas control valve, and gas control valve is operated with sucking control valve.
According to embodiments of the invention, suction device comprises the air cleaner that forms the air cleaner chamber, and this air cleaner chamber constitutes the suction path, in gas control valve is arranged in the air cleaner chamber and generates the importing path that is communicated with between the chamber, be communicated with so that plasma is supplied to passage portion with the passage portion of the suction path that sucks the control valve downstream and generate the chamber.
According to embodiments of the invention, suck control valve and gas control valve and have shared valve shaft.
According to embodiments of the invention, can control the growing amount of the plasma that will be generated by gas flow control device, this gas flow control device according to Load Control required on the internal-combustion engine import generate indoor plasma generate air gas flow (gas rate) increase or reduce.Therefore, can in the big operating range of the internal-combustion engine of required load change, suitably set the gas flow that generates gas with respect to the plasma of required load.Therefore, can suppress variation and the inhomogeneity decline that sucks air and fuel mix, suitably set according to required load simultaneously and supply to the amount of plasma that sucks path by the air-fuel ratio of the plasma air generation that does not change into plasma.Therefore, can improve the effect of the combustibility raising that obtains by plasma.
According to embodiments of the invention, gas control valve is operated with the suction control valve, and with the gas flow (that is, air mass flow) of control plasma generation air, thereby inhibition is by the variation of the air-fuel ratio of the gas flow generation of plasma generation air.
According to embodiments of the invention, the air in the clean room of the air cleaner of suction device makes its flow be directed to the generation chamber by importing path after by gas control valve control.Therefore, can suck plasma by the air cleaner that uses suction device and generate air, so can simplify the structure of plasma generating equipment.And plasma generating equipment can be arranged near suction device, thereby allow the compact structure of suction device and plasma generating equipment.
Because plasma generates air and is inhaled in air cleaner, even so when the plasma flow that generates when importing path, the backflow plasma by import path flow to air cleaner indoor after, the backflow plasma flows to the downstream side by sucking path with sucking air, and is inhaled in the firing chamber.Therefore, be provided to the air cleaner of suction device, can prevent that by simple structure the backflow plasma leaks into the internal-combustion engine outside by use.
According to embodiments of the invention, because suction control valve and gas control valve have shared valve shaft, the valve shaft that sucks control valve can be as the valve shaft of gas control valve, so can simplify the structure of plasma generating equipment.Further, plasma generating equipment can be arranged near suction device, thus the layout compactness of permission suction device and plasma generating equipment.
Below from the detailed description that hereinafter provides understanding further application area of the present invention.Yet; it should be understood that although the clear preferred embodiment of the invention still only provides the detailed description and specific examples by explanation; because to one skilled in the art, the variations and modifications in the present invention's essence and protection domain are conspicuous from this detailed description.
Description of drawings
Also understand the present invention more fully from the detailed description that hereinafter provides with reference to only providing but being not limited to accompanying drawing of the present invention by legend, wherein:
Fig. 1 is the major component left side view of motorcycle, and wherein this motorcycle has within it to install and is applied to internal-combustion engine of the present invention;
Fig. 2 is the major component figure of the amplification of the internal-combustion engine cut open of the part among Fig. 1;
Fig. 3 is the sectional view of the major component of IIIb-IIIb along the line among the being seen major component figure of arrow IIIa-IIIa and Fig. 2 among Fig. 2;
Fig. 4 is the major component sectional view of the plasma generating equipment among Fig. 2; And
Fig. 5 shows intake in the internal-combustion engine among throttle valve opening and gas control valve aperture and Fig. 1 and the relation table between the gas flow.
Embodiment
Following with reference to Fig. 1-5 explanation embodiments of the invention.
With reference to Fig. 1, internal-combustion engine E is cool air single cycle 4 stroke IC engines that comprise plasma generating equipment P according to an embodiment of the invention.With internal-combustion engine E level being installed in the motorcycle V as the traffic tool along the bent axle 26 of vehicle-width direction orientation.Internal-combustion engine E and the driving mechanism M that is connected to internal-combustion engine E constitute power unit, and this power unit drives trailing wheel 6 as driving wheel by the powered rotation ground that is generated by internal-combustion engine E.
Motorcycle V comprises: main body, and this main body has the body cover C of main frame F and main body covered F; Be supported on the power unit on the main frame F; With the chain driving mechanism 15 as final reduction gear mechanism, this reduction gear reduced to come from the power speed of power unit before sending power speed to trailing wheel 6.
Main frame F comprises: as the head pipe 1 (head pipe) of its front end; Manage the 1 oblique body frame 7 that extends to the back down from the head; Extend to a pair of left and right sides after-frame 3 of back obliquely from the rear portion of body frame 2; Pivot axillare 4 with the rear portion that is connected to body frame 2.
It should be noted in the present embodiment, with reference to motorcycle V limit such as before and after up and down and about a plurality of directions.
Driving mechanism M is formed by the gear type driving mechanism to input shaft, and the power of internal-combustion engine E inputs to the input shaft of driving mechanism M via bent axle 26 and clutch.Driving mechanism M is arranged in integral body and is formed with in the transmission case of crankcase 23 of internal-combustion engine E.The power that comes from the output shaft 14 of driving mechanism M sends trailing wheel 6 to via driving mechanism 15.
As shown in Figure 2, internal-combustion engine E comprises engine main body, and this engine main body has the cylinder 21 that turns forward greatly, and like this, the cylinder-bore axis Lc of engine main body is directed forward from bent axle 26 ground that is inclined upwardly a little about horizontal plane.Cylinder head 22 is attached to the end of cylinder 21, and crankcase 23 is attached to the end of the cylinder 21 relative with cylinder head 22 about the cylinder-bore axis direction.
Piston 24 cooperates with cylinder 21, and this cylinder 21 is arranged in the main body, and its cylinder-bore axis Lc is allowed to-and-fro motion like this by horizontal orientation haply.Piston 24 is connected to the bent axle 26 that rotatably is supported on the crankcase 23 via connecting rod 25.
As shown in Fig. 2,3, cylinder head 22 comprises: firing chamber 27, and this firing chamber 27 is relative with piston 24 about the cylinder-bore axis direction; Suction port 28, this suction port 28 have opening to the firing chamber 27 suction opening 28a; Exhaust port 29, this exhaust port 29 have opening to the firing chamber 27 discharge aperture 29a; And suction valve 30 and outlet valve 31, this suction valve 30 and outlet valve 31 open and close suction opening 28a and discharge aperture 29a respectively.
As shown in fig. 1, internal-combustion engine E comprises: suction device 40, wherein, this suction device 40 forms air flue 50, and this air flue 50 is used for will importing to the air flue 50 of firing chamber 27 from the outside inhaled air of internal-combustion engine E (being called " suction air " later on) via suction port 28; As the fuel injection valve 56 of air-fuel mixture formation device, this fuel injection valve 56 is used for forming air-fuel mixture by supplying fuel to the suction air that is imported by air flue 50; And venting gas appliance, venting gas appliance forms drain passageway, and this drain passageway is used for 27 will being drawn out to the outside of internal-combustion engine E by the combustion gas that the 27 internal combustion air-fuel mixtures in the firing chamber produce as waste gas via exhaust port 29 from the firing chamber.
About sucking the mobile definition upstream and downstream direction of air.
From left and right and above covered and be connected to body frame 2 by body cover C air cleaner 41 be arranged in body frame 2 below, and formation air cleaner chamber 51 is contained in this air cleaner chamber 51 as the cleaning element 42 of filter component.By cleaning element 42 air cleaner chamber 51 is divided at the dust precipitation chamber 51a of upstream side with at the clean room 51b in downstream side.The upstream of throttling main body 45 is open-ended to clean room 51b.
As shown in Fig. 2,3, throttling arrangement 44 comprises that throttling main body 45 and conduct are arranged in the throttle valve 46 of the suction control valve in the air flue 52, wherein throttling main body 45 is the conduits that form air flue 52, and the suction air flows that comes from air cleaner chamber 51 is by this air flue 52.Operate by throttle operation mechanism 48 by the throttle valve 46 that butterfly valve forms as valve operating gear.More specifically, throttle valve 46 by throttle operation mechanism 48 by 47 operations (this throttle operation mechanism 48 has the actuating cable 48a that is operated by the rider) of its valve shaft, so that change in the scope of the aperture of throttle valve 46 between the open position of the closed position of aperture minimum and aperture maximum.Thereby, the controlled (see figure 5) of intake Ma, this intake Ma is for sucking the flow of the suction air in the firing chamber 27 by air flue 52.Air flue 52 is included in the upstream passages 52a of throttle valve 46 upstreams and at the downstream passages 52b in throttle valve 46 downstreams, and throttle valve 46 is between them.In downstream passages 52b, the suction pressure that generates according to the aperture of throttle valve 46.Aperture is more little, the suction pressure that is generated low more (that is, the negative pressure of generation is big more).
The suction air of being controlled by throttle valve 46 when its flow that has entered air flue 52 from air cleaner chamber 51 is when coming from the fuel mix of fuel injection valve 56, and air-fuel mixture forms.When opening suction valve 30, fuel-air mixture passes air flue 52, air flue 53 that is formed by suction pipe 49 and suction port 28 to be to enter firing chamber 27, then by insertion be located in the cylinder head 22 patchhole and towards the firing chamber 27 spark plug (not shown) light so that burn.When opening outlet valve 31, before combustion gas flow out to exhaust port 29, the combustion gases drive piston 24 that generates by the burning of the air-fuel mixture in the firing chamber 27.Be released at combustion gas before the outside of internal-combustion engine E, combustion gas further pass the venting gas appliance that comprises outlet pipe 39 (see figure 1)s that are connected to exhaust port 29.
Suck air flue (hereinafter referred to as " suction path ") and forms the air flue 50 of these air flue 52,53 formation suction device 40 by air cleaner chamber 51 and air flue 52,53 and suction port 28.
As shown in Fig. 2-4, internal-combustion engine E comprises plasma generating equipment P, this plasma generating apparatus P will suck air and change into plasma state and generate plasma (still seeing Fig. 1), and this sucks air is the air (hereinafter referred to as " plasma generation air ") that generates gas as plasma.As everyone knows, plasma contains free radicals (when air is plasma gas, containing oxygen radical or nitrogen free radical), and this free radicals has the high-temperature activation molecule, thereby promotes burning.
Plasma generating equipment P comprises: plasma generator capable 60, and this plasma maker 60 has the generation chamber 61 that plasma generates within it; Ingress pipe 70, this ingress pipe 70 are formed for that plasma is generated air and import to the importing path 71 that generates chamber 61; Supplying pipe 75, this supplying pipe 75 are formed for plasma is supplied with the supply passage 76 that sucks path; With power supply unit 80 as the energy source that is used to generate plasma.
Plasma generator capable 60 with tubular form comprises: tube-like envelope 62, this tube-like envelope 62 have the cylindrical shape that forms in this example that generates chamber 61; Be arranged in the anode 63 and the negative electrode 64 that generate in the chamber 61; Be connected to splicing ear 65a, the 65b of power supply unit 80; And the leading pipe 66 that forms path of navigation 67, this path of navigation 67 is used for that plasma is generated air and imports to generation chamber 61 interior discharge space 61a as the plasma span from importing path 71.Each forms shell 62 and leading pipe 66 by electric insulating material.
In this manual, one in anode 63 and the negative electrode 64 is first electrode, and another electrode is second electrode.
In importing path 71, be furnished with gas control valve 72 (see figure 5)s, this gas control valve 72 is configured for the gas flow control apparatus according to Load Control gas flow Mg required on the internal-combustion engine, and the Mg representative flows to the flow that the plasma that generates in the chamber 61 generates air.Operate with the opening and closing with throttle valve 46 of the gas control valve 72 that open and close to import path 71 to open and close synchronously with throttle valve 46, with such method, when opening throttle valve 46, gas control valve 72 is opened.
As shown in Figure 5, when the required load of internal-combustion engine E, when promptly sucking the intake Ma increase of air, throttle operation mechanism 48 control gaseous control valves 72 are to increase the gas flow Mg that plasma generates air.In the present embodiment, when intake Ma increased, control gaseous control valve 72 was to increase gas flow Mg in the gamut of the aperture of throttle valve 46.
At this moment, the gas flow Mg that plasma generates air is configured to the ratio of intake Ma: get over hour when the aperture of throttle valve 46 becomes, that is, the engine load on internal-combustion engine E becomes more hour, and it is big more that gas flow Mg just becomes; And gas flow Mg becomes greater than intake Ma in the low load operation scope of internal-combustion engine, and gas flow Mg becomes less than intake Ma in the high loading operating range of internal-combustion engine.
As intake Ma and gas flow Mg's and the total discharge representative be inhaled into the flow of the air in the firing chamber 27.Provide by the air-fuel mixture under the predefined air-fuel ratio that configures, with consistent at the air under this total discharge with the serviceability of internal-combustion engine E.
Supplying pipe 75 will be supplied with downstream passages 52b from the plasma of outlet 61o emission, and this downstream passages 52b is the passage portion of the suction path between throttle valve 46 and the suction valve 30.Supplying pipe 75 is connected to shell 62 at upstream side, is connected to throttling main body 45 in the downstream side.Supply passage 76 is communicated with downstream passages 52b and generates chamber 61 by outlet 61o, imports to downstream passages 52b with the plasma that will generate in discharge space 61a.Plasma is inhaled into firing chamber 27 with air-fuel mixture or suction air.
The outlet 76o of supply passage 76 is arranged in the downstream of the spray nozzle part 56a of fuel injection valve 56, and is positioned at a little from the upstream of fuel injection valve 56 or the inner fuel nozzle ports of injecting of fuel nozzle ports.Thereby the suction air in downstream passages 52b is heated by the high-temperature plasma of supplying with from supplying pipe 75 with the fuel that comes from fuel injection valve 56, thereby helps the formation of air-fuel mixture, and also improves flammable.
As shown in Fig. 2 and Fig. 3, ingress pipe 70, shell 62 and supplying pipe 75 are along arranging as the air flue 52 that sucks path.The path center line of ingress pipe 70 or importing path 71 and the central axis of shell 62 are arranged essentially parallel to the path center line of air flue 52.
The power supply unit 80 that voltage is supplied with anode 63 and negative electrode 64 comprises as the battery 81 of power supply and the voltage of battery 81 is changed into the power control 82 of class pulsed voltage (below become " pulsed voltage ").Based on the signal that comes from control gear 90, power control unit 82 is according to the frequency of the serviceability of above-mentioned motor control representative voltage size, pulse width w, pulse height h and applying regularly and the endurance as the pulsed voltage of discharge voltage.
When the voltage pulse under the preset frequency is imposed on anode 63 and negative electrode 64, between anode 63 and negative electrode 64, be created on the Arc Discharge under the preset frequency, thereby produced impulse discharge current as the class impulsive current.When pulse height is set to normal value, controlled as the duty factor of the impulse discharge current of discharge current by changing the pulse width w of pulsed voltage, therefore that the amount of the free radicals of the temperature of the plasma that is generated or generation is controlled.
The duty factor of impulse discharge current refers to the endurance ratio, and impulsive current flows through a circulation of pulsed voltage in this endurance.
The timing that imposes on the anode 63 and the pulsed voltage of negative electrode 64 was set to roughly with the endurance injects regularly identical with the fuel injection endurance with the fuel of fuel injection valve 56.
Because imposing on the voltage of anode 63 and negative electrode 64 is pulsed voltage, when with constant voltage is imposed on anode 63 when comparing with negative electrode 64 always, the energy consumption of the energy that consumes as being used to generate plasma is significantly reduced.
Further, following information obtains by experiment.
Along with the increase of duty factor, the temperature of plasma has risen, and the amount of the free radicals that generates has also increased.
Along with the increase of pulse height h, the amount of the free radicals of generation has increased.
Therefore, except the control plasma generates the gas flow Mg of air, pulsed voltage or impulse discharge current can be controlled to control the amount of the free radicals of generation.
Next the following describes the embodiment's of structure operation and effect as mentioned above.
In the plasma generating equipment P that is provided with the generation chamber 61 that is used to generate plasma, generate chamber 61 and suck path and be communicated with, and plasma generating equipment P supplies to throttle valve 46 in the suction path and the downstream passages 52b between the suction valve 30 with plasma.Be communicated with the suction path like this because generate chamber 61, in this sucked path, suction pressure became the pressure that is lower than near the compression pressure of firing chamber 27 inherent compression top dead center, was substantially equal to suction pressure so generate barometric pressure.Therefore, when being the situation of above-mentioned compression pressure when comparing, can improve the efficient that plasma generates, thereby can reduce size and the weight of plasma generating equipment P with generating barometric pressure.Further, because low generation barometric pressure can reduce the power consumpiton that is used to generate plasma.
Further, because plasma, thus suck air and the fuel supplied with from fuel injection valve 56 is heated, and its temperature is raised.Thereby, form air-fuel mixture easily.Therefore, also, increased the combustibility of the air-fuel mixture in the firing chamber 27, thereby realized motor output that increases and the fuel efficiency that improves owing to be contained in the interior free radicals of plasma.
Plasma generating equipment P comprises the plasma generator capable 60 that is provided with generation chamber 61 and is connected to plasma generator capable 60 plasma imported to downstream passages 52b and also to be communicated with the supplying pipe 75 that generates chamber 61 and downstream passages 52b always.Because so supplied with by supplying pipe 75 by the plasma that plasma generator capable 60 generates, therefore the layout of supplying pipe 75 or the joint that is connected to the supplying pipe 75 that sucks path can easily change, thereby increase the supply unit of the plasma in the plasma generator capable 60 and suck the degrees of freedom of the downstream passages 52b aspect of path.
Further, generate chamber 61, therefore there is no need to be provided for to bring the private access or the conduit of suction pressure, thereby simplified the structure of plasma generating equipment P generating barometric pressure because the suction pressure in throttle valve 46 downstreams is transmitted to by supplying pipe 75.
It is the suction air that sucks from the air cleaner chamber 51 that constitutes the suction path that plasma generates air, and the supplying pipe 75 of plasma generator capable 60 and plasma generating equipment P is along constituting air flue 52 layouts that suck path.Thereby, be to suck air because plasma generates air, and ingress pipe 70, plasma generator capable 60 and supplying pipe 75 can be arranged side by side with suction device 40, thereby allow the compact Layout of plasma generating equipment P.
Because plasma contains free radicals, suck air or air-fuel mixture has improved combustibility so plasma added to.Yet,, that the intake that is inhaled into the suction air in the firing chamber 27 is very big based on the operational state change of internal-combustion engine E according to load required on the internal-combustion engine.Therefore, if the relative intake deficiency of amount of the plasma that generates just is difficult to utilize fully the effect by the combustibility raising of plasma acquisition in the big operating range of internal-combustion engine.Further, also having a kind of situation is that the relative intake of amount of plasma is excessive.
Therefore, amount for the plasma of controlling generation, it is constant to make the plasma that imports in the plasma generating equipment P generate the gas flow of gas, and the discharge voltage that is used to generate discharge with control becomes plasma state so that plasma is generated gas reforming.Yet, in this case, the plasma that the is not converted to plasma existence that generates gas makes and is difficult to regulate air-fuel ratio (proportions of ingredients of the air-fuel mixture between the air that to be fuel interior with being inhaled into firing chamber 27) or guarantees the uniformity that air-fuel mixture mixes.
Suction pressure in sucking path is used to that plasma is generated gas and imports under the situation that generates chamber 61, because during the low load operation of internal-combustion engine E, the aperture of throttle valve 46 diminishes, the suction pressure step-down in throttle valve 46 downstreams (negative pressure become big), thus plasma generate the gas flow of gas trend towards excessive.On the other hand, because in the high loading operation period of internal-combustion engine E, it is big that the aperture of throttle valve 46 becomes, and the suction pressure in throttle valve 46 downstreams uprises (negative pressure diminishes), so plasma generates the gas flow of gas and trends towards deficiency, therefore cannot realize effect fully by the combustibility raising of plasma acquisition.
For head it off, the plasma generating equipment P of internal-combustion engine E comprises gas control valve 72, and when intake Ma was controlled with increase intake Ma by throttle valve 46, this gas control valve 72 increased the gas flow Mg that plasmas generate air.Because the growing amount of the plasma that is generated can so be controlled by gas control valve 72, this gas control valve 72 is controlled gas flow Mg increase or the minimizing that the indoor plasma of importing generation generates air according to increase or the minimizing of the intake Ma of the suction air that causes because of throttle valve 46, so the gas flow Mg of the plasma of relative intake Ma generation air can suitably be provided with in the operating range greatly of the internal-combustion engine E that intake Ma changes.Therefore, can suppress to generate variation and the suction air and the inhomogeneity decline of fuel mix of the air-fuel ratio that existence produced of air, suitably set the amount that supplies to the plasma that sucks path according to intake Ma simultaneously by the plasma that does not change into plasma.Thereby, can improve the effect of the combustibility raising that obtains by plasma.
It is the suction air of throttle valve 46 upstreams that plasma generates air, that is, and and the suction pressure in the air cleaner chamber 51.Because gas control valve 72 is with throttle valve 46 operations, so gas control valve 72 is controlled the gas flow Mg that plasma generates air with throttle valve 46, thereby suppressed because the variation of the air-fuel ratio that the gas flow Mg of plasma generation air causes.
Because plasma generates air and is inhaled in air cleaner 41, even so when the plasma flow that generates when importing in the path 71, at the backflow plasma by importing after path 71 flows in the clean room 51b of air cleaner chamber 50, the backflow plasma flows to the downstream side with sucking air by sucking path, and sucks in the firing chamber 27.Therefore, be provided to the air cleaner 41 of suction device 40, can prevent that by simple structure the backflow plasma leaks into the outside of internal-combustion engine E by use.
Because throttle valve 46 and gas control valve 72 have shared valve shaft 47,73, the valve shaft 47 of throttle valve 46 can be as the valve shaft 73 of gas control valve 72, so can simplify the structure of plasma generating equipment P.Further, plasma generating equipment P can arrange near the throttling main body 45 of suction device 40, thus the compact Layout of permission suction device 40 and plasma generating equipment P.
Because when the aperture of throttle valve 46 becomes more hour, the gas flow Mg of plasma generation air can be set as big more with the ratio of intake Ma, promptly, engine load on internal-combustion engine E more hour, in the low load operation scope of internal-combustion engine E, can increase the flammable effect that improves, keep the air-fuel ratio of above-mentioned setting simultaneously.And, because gas flow Mg is greater than intake Ma in low load operation scope, so can further increase the flammable effect that improves.
Embodiment for partly being revised according to the structure of the foregoing description hereinafter provides the explanation that is modified structure.
Shown in the double dot dash line among Fig. 2, the central axis intersection that the plasma generator capable 60 of plasma generating equipment P can be arranged to shell 62 sucks path.Ingress pipe 70, gas control valve 72 and supplying pipe 75 are illustrated by double dot dash line under the sort of situation.
Plasma generation gas can be the gas except that sucking air.
Shown in the double dot dash line among Fig. 2, power supply unit 80 can integrally be connected with plasma generator capable 60.
Generating chamber 61 can be via being located at the interior opening and closing valve of path (or conduit) by being communicated with the path (or conduit) and the suction path of supply passage 76 (or supplying pipe 75) isolation.In supply passage 76, the opening and closing valve can be set, this opening and closing valve is used to control timing and the endurance that plasma is supplied to upstream passages 52b.
Except the mechanism that is constructed to manually be operated by the rider, throttle operation mechanism can be for comprising the mechanism of actuator (as motor).Further, throttle valve and gas control valve can be by independent operating device operations.
Internal-combustion engine can maybe can suck the compression ignition type internal combustion engine of throttling for execution within it for comprising the multi cylinder formula internal-combustion engine as the suction main of suction pipe device.
The plasma generating equipment P of internal-combustion engine E comprises gas control valve 72, when intake Ma is controlled by throttle valve 46 and when increasing, this gas control valve 72 increases the gas flow Mg that plasmas generate air.Because the growing amount of the plasma that is generated can be controlled by gas control valve 72 like this, this gas control valve 72 is controlled gas flow Mg increase or the minimizing that the indoor plasma of importing generation generates air according to increase or the minimizing of the intake Ma of the suction air that causes because of throttle valve 46, so the gas flow Mg of the plasma of relative intake Ma generation air can suitably be provided with in the operating range greatly of the internal-combustion engine E that intake Ma changes.Thereby, can suppress the variation of the air-fuel ratio that produces by the existence of the plasma air that does not change into plasma and suck the inhomogeneity decline of air and fuel mix, suitably set the amount that supplies to the plasma that sucks path according to intake Ma simultaneously.Therefore, can improve the effect of the combustibility raising that obtains by plasma.
Known when generating plasma by plasma generating equipment P, the generation barometric pressure in the plasma generating equipment P is low more, easy more generation plasma.So, can improve the plasma formation efficiency under the situation below, be that plasma can generate under the pressure of the compression pressure near the firing chamber the compression top dead center of timing that equals to light a fire corresponding to air-fuel mixture or the just timing before igniting, perhaps plasma can generate under less than the generation barometric pressure that generates barometric pressure (this generation barometric pressure is equal to or higher than compression pressure).Along with the raising of plasma formation efficiency, also can reduce size, weight and the energy consumption of plasma generating equipment.
For this reason, in the plasma generating equipment P that is provided with the generation chamber 61 that is used to generate plasma, generate chamber 61 and suck path and be communicated with, and plasma generating equipment P supplies to downstream passages 52b between the suction valve 30 in throttle valve 46 and the suction path with plasma.So be communicated with the suction path because generate chamber 61, the suction pressure in this suction path is lower than near the compression pressure the 27 inherent compression top dead center of firing chamber, is substantially equal to suction pressure so generate barometric pressure.Therefore, when being the situation of above-mentioned compression pressure when comparing, can improve the efficient that plasma generates, thereby can reduce size and the weight of plasma generating equipment P with generating barometric pressure.Further, because low generation barometric pressure can reduce the power consumpiton that is used to generate plasma.
Further, because plasma, thus suck air and the fuel supplied with from fuel injection valve 56 is heated, and its temperature is raised, and be easy to form air-fuel mixture.Therefore, also owing to be contained in the interior free radicals of plasma, the combustibility of the air-fuel mixture in the firing chamber 27 is increased, thereby has realized that motor output increases and fuel efficiency improves.
Plasma generate the air that air can be the internal combustion engines the suction air in sucking path (as, be stored in the air in the air tank), or internal-combustion engine air outside.And, plasma generate air can be outside the deacration as the air-fuel mixture of fuel and air or the gas of tail gas.
Internal-combustion engine can be the motor that does not comprise throttle valve.Under the sort of situation, the suction control valve is a suction valve.
The present invention so has been described, has it is evident that identical invention can change in many ways.These change does not think and breaks away from essence of the present invention and protection domain, and all such modifications all are conspicuous to one skilled in the art, and is intended to be included in the protection domain of claims.
Claims (20)
1. plasma generator capable that uses with internal-combustion engine comprises:
Suction device, described suction device comprise the throttle valve that is arranged in the suction path, and described suction path has the suction opening of opening to the firing chamber;
Suction valve, described suction valve is used to open and close described suction opening; And
Plasma generating equipment, described plasma generating equipment have and are used for that plasma is generated gas reforming and become plasma state to generate the generation chamber of plasma;
Wherein said generation chamber is communicated with described suction path; And
Described plasma generating equipment supplies to plasma the passage portion of the described suction path between described throttle valve and described suction valve.
2. the plasma generator capable that uses with internal-combustion engine according to claim 1, wherein said plasma generating equipment comprises the plasma generator capable that forms described generation chamber, and supplying pipe, described supplying pipe is connected to described plasma generator capable plasma being imported to described passage portion, and is used for being communicated with described passage portion and described generation chamber always.
3. the plasma generator capable that uses with internal-combustion engine according to claim 2, wherein
It is the suction air that flows in described suction path that described plasma generates gas; And
Described plasma generator capable and described supplying pipe are along described suction access arrangements.
4. the plasma generator capable that uses with internal-combustion engine according to claim 1, wherein said throttle valve are the butterfly valves that is operatively coupled to throttle operation mechanism, and described throttle operation mechanism is selectively operated to open and close described butterfly valve.
5. the plasma generator capable that uses with internal-combustion engine according to claim 1, it further comprises the control gear that is operatively coupled to the fuel injection valve, and described fuel injection valve is used in the position that is close to the passage portion that plasma is supplied to the described suction path between described throttle valve and the described suction valve optionally with the described suction path of fuel supply.
6. the plasma generator capable that uses with internal-combustion engine according to claim 1, wherein said generation chamber comprise and are operatively coupled to power supply so that described plasma is generated anode and the negative electrode that gas reforming becomes plasma.
7. the plasma generator capable that uses with internal-combustion engine according to claim 6, wherein said negative electrode comprises end, to be arranged on described generation indoor so that to generate the leading pipe of gas coaxial with being used to supply with plasma for heart in the described end, and described negative electrode comprises and is configured to the near-end that surrounded by described anode basically.
8. the plasma generator capable that uses with internal-combustion engine according to claim 7, further comprise gas control valve, described gas control valve operatively is positioned in the described leading pipe so that control supplies to the supply that the plasma of described generation chamber generates gas.
9. the plasma generator capable that uses with internal-combustion engine according to claim 8, wherein said gas control valve are operated with described throttle valve so that the plasma that synchronously opens and closes described leading pipe with the opening and closing of described throttle valve generates the supply of gas.
10. the plasma generator capable that uses with internal-combustion engine according to claim 6, wherein said power supply imposes on described anode and negative electrode with pulsed voltage, and described pulsed voltage is set to basically to be injected regularly identical with the fuel injection endurance with fuel.
11. a plasma generator capable that uses with internal-combustion engine comprises:
Suction device, described suction device comprise the suction control valve that is used to control by the intake that sucks the suction air in the path suction firing chamber; And
Plasma generating equipment, described plasma generating equipment have and are used for that plasma is generated gas reforming and become plasma state to generate the generation chamber of plasma;
Wherein said plasma generating equipment comprises gas flow control device, described gas flow control device is according to the gas flow of the described plasma generation of required Load Control gas, and described plasma generating equipment offers described suction path with plasma.
12. the plasma generator capable that uses with internal-combustion engine according to claim 11, wherein
It is that plasma generates air that described plasma generates gas, and it is the suction air of described internal-combustion engine air outside or described suction control valve upstream that described plasma generates air;
Described gas flow control device is formed by gas control valve; And
Described gas control valve is operated with described suction control valve.
13. the plasma generator capable that uses with internal-combustion engine according to claim 12, wherein
Described suction device comprises air cleaner, and described air cleaner forms the air cleaner chamber that constitutes described suction path;
Described gas control valve is arranged in and imports in the path, and described importing path is communicated with between described air cleaner chamber and described generation chamber; And
Described generation chamber is communicated with the passage portion of the described suction path in described suction control valve downstream, so that described plasma is supplied to described passage portion.
14. the plasma generator capable that uses with internal-combustion engine according to claim 12, wherein said suction control valve and described gas control valve have shared valve shaft.
15. the plasma generator capable that uses with internal-combustion engine according to claim 13, wherein said suction control valve and described gas control valve have shared valve shaft.
16. comprising, the plasma generator capable that uses with internal-combustion engine according to claim 11, wherein said generation chamber be operatively coupled to power supply so that described plasma is generated anode and the negative electrode that gas reforming becomes plasma.
17. the plasma generator capable that uses with internal-combustion engine according to claim 16, wherein said negative electrode comprises end, to be arranged on described generation indoor so that to generate the leading pipe of gas coaxial with being used to supply with described plasma for heart in the described end, and described negative electrode comprises and is configured to the near-end that surrounded by described anode basically.
18. the plasma generator capable that uses with internal-combustion engine according to claim 17, wherein said gas flow control device is a gas control valve, and described gas control valve operatively is positioned in the described leading pipe so that control supplies to the described supply that the plasma of described generation chamber generates gas.
19. the plasma generator capable that uses with internal-combustion engine according to claim 18, wherein said gas control valve is operated with described throttle valve, so that the plasma that synchronously opens and closes described leading pipe with the opening and closing of described throttle valve generates the described supply of gas.
20. the plasma generator capable that uses with internal-combustion engine according to claim 16, wherein said power supply imposes on described anode and negative electrode with pulsed voltage, and described pulsed voltage is set to basically to be injected regularly identical with the fuel injection endurance with fuel.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007246867 | 2007-09-25 | ||
| JP2007246866 | 2007-09-25 | ||
| JP2007246866A JP4879130B2 (en) | 2007-09-25 | 2007-09-25 | Internal combustion engine equipped with a plasma generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101397950A true CN101397950A (en) | 2009-04-01 |
Family
ID=40516739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810161705 Pending CN101397950A (en) | 2007-09-25 | 2008-09-22 | Internal combustion engine including plasma generating device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4879130B2 (en) |
| CN (1) | CN101397950A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101701558B (en) * | 2009-11-30 | 2011-12-07 | 中国科学院西安光学精密机械研究所 | Method for increasing combustion efficiency of combustion engine |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3746822B2 (en) * | 1995-12-28 | 2006-02-15 | 和男 元内 | Ion generator for internal combustion engine |
| JP2007107491A (en) * | 2005-10-17 | 2007-04-26 | Seiji Baba | Combustion accelerating air treatment device for displacement type internal combustion engine |
-
2007
- 2007-09-25 JP JP2007246866A patent/JP4879130B2/en not_active Expired - Fee Related
-
2008
- 2008-09-22 CN CN 200810161705 patent/CN101397950A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101701558B (en) * | 2009-11-30 | 2011-12-07 | 中国科学院西安光学精密机械研究所 | Method for increasing combustion efficiency of combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2009074521A (en) | 2009-04-09 |
| JP4879130B2 (en) | 2012-02-22 |
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Open date: 20090401 |