CN104696126B - Fuel dispenser and the engine using the fuel dispenser - Google Patents
Fuel dispenser and the engine using the fuel dispenser Download PDFInfo
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- CN104696126B CN104696126B CN201310666254.2A CN201310666254A CN104696126B CN 104696126 B CN104696126 B CN 104696126B CN 201310666254 A CN201310666254 A CN 201310666254A CN 104696126 B CN104696126 B CN 104696126B
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Abstract
The present invention provides a kind of fuel dispenser, including：Valve is distributed, which receives metering fuel oil to distribute the fuel oil of main combustion stage nozzle and pre-combustion grade nozzle for being provided to combustion chamber；And electrohydraulic servo valve, the electrohydraulic servo valve controls the distribution valve to distribute the fuel oil for being provided to the main combustion stage nozzle and the pre-combustion grade nozzle according to first control signal, which is at least partially based on the working condition of engine and the first feedback signal generation from the distribution valve.
Description
Technical field
The present invention relates to the fuel dispensers in engine more particularly to engine.
Background technology
To meet increasingly harsh aero-engine emission standard, low consumption oil cut rate, low stain, low emission are the following people
The Main Trends of The Development of boat engine combustion technology.For example, according to the CAEP6 standards used at present, discharged nitrous oxides requirement
It is lower by 60% than old-fashioned engine average discharge level.Therefore advanced combustion with reduced pollutants technology is modern civil engine
Hot spot development direction.
The target of combustion with reduced pollutants technology is to reduce NOx（Nitrogen oxides）、CO（Carbon monoxide）、UHC（Unburned nytron
Object）And flue dust.According to NOxIt is understood with the CO mechanism generated and result of the test：The combustion zone equivalent proportion of combustion chamber is 0.6~0.8
In the range of when, generated NOxSeldom with CO, the emission equivalent of UHC and CO are also similar.Combustion zone equivalent proportion refers to reality
Oil-gas ratio divided by the appropriate oil-gas ratio of chemistry, and the oil-gas ratio of combustion zone refers to fuel flow divided by participates in the air of burning
Amount.Therefore, the key problem of combustion with reduced pollutants technology is to reduce the temperature of combustion zone while makes combustion zone temperature field uniform,
I.e. whole and part equivalent proportion control.Specifically, NOx is taken into account with the discharge capacity of CO, UHC all in relatively low range, it should
Consider two factors：When the average equivalent ratio of combustion zone, second is that the uniformity of combustion zone equivalent proportion.Combustion zone equivalent proportion it is equal
Even property depends primarily on the uniformity of fuel-oil atmozation and oil gas blending again, i.e., depending on these two aspects：Fuel particles diameter is distributed
Uniformity and fuel oil oil mist concentration distribution uniformity.
Current combustion room design method and fuel distribution method have larger deficiency in the above problem.For example, starting
During the high working condition of machine, the equivalent proportion of combustion zone temperature is 1 or so, will far more than equivalence ratio range needed for above-mentioned combustion with reduced pollutants
It asks, and in low working condition, combustion zone equivalent proportion is again very low, far below equivalent proportion section needed for above-mentioned combustion with reduced pollutants.This
It is because conventional engine combustion technology uses single-stage fuel feeding or even if employs the classification of pre-combustion grade and main combustion stage mostly
Fuel feeding, but actively continuous adjust can not be carried out to the fuel delivery of pre-combustion grade and main combustion stage double-stage nozzle.It is asked caused by this way
Topic is accurately to carry out fuel feeding according to the actual demand amount of the double-stage nozzle of combustion chamber, causes in combustion zone equivalent proportion not
Uniformly, the indexs such as the fuel efficiency of engine are reduced, constrain the low consumption oil cut rate and low pollution emission of civil engine
Performance.
Therefore, there is an urgent need for a kind of efficient combustions that actively continuous fuel control can be carried out to pre-combustion grade and main combustion stage for this field
Oily distribution technique.
Invention content
A brief summary of one or more aspects is given below to provide to the basic comprehension in terms of these.This general introduction is not
The extensive overview of all aspects contemplated, and be both not intended to identify critical or decisive element in all aspects also non-
Attempt to define the range in terms of any or all.Its unique purpose is to provide the one of one or more aspects in simplified form
A little concepts are with the sequence for more detailed description given later.
According to an aspect of the present invention, a kind of fuel dispenser is provided, including：Valve is distributed, which receives
Fuel oil is measured to distribute the fuel oil of main combustion stage nozzle and pre-combustion grade nozzle for being provided to combustion chamber；And electrohydraulic servo valve, the electricity
Hydraulic servo is provided to the main combustion stage nozzle and pre-combustion grade spray to control the distribution valve according to first control signal to distribute
The fuel oil of mouth, the first control signal be at least partially based on the working condition of engine and from the distribution valve first
Feedback signal generation.
In one example, which includes：Spool, which is moveable in the distribution valve is divided with adjusting
Be assigned to the amount of fuel of the main combustion stage nozzle and the pre-combustion grade nozzle, wherein, the electrohydraulic servo valve according to the first control signal to
The distribution valve provides position of the modulation oil to adjust the spool；And linear displacement transducer, the linear displacement transducer are used
In perceiving the position of the spool to generate first feedback signal.
In one example, which includes linear variable difference transformer.
In one example, which is included along the circumferential main combustion stage first order jet nozzle being classified of the combustion chamber and main combustion
Grade secondary nozzle, the wherein fuel dispenser further include：First classification valve, the first classification valve are coupled to the distribution valve
With selectively to the main combustion stage first order jet nozzle and main combustion stage secondary nozzle fuel feeding；And first solenoid valve, first solenoid valve
Controlling the switch of the first classification valve according to second control signal, this to choose whether to the main combustion stage secondary nozzle fuel feeding
Two control signals are at least partially based on the working condition of engine and the second feedback signal from the first classification valve
Come what is generated.
In one example, which includes：Spool, the spool are moveable in the first classification valve
To control the switch of the first classification valve, the first classification valve when closed not to the main combustion stage secondary nozzle fuel feeding,
In first solenoid valve provide position of the modulation oil to adjust the spool to the first classification valve according to the second control signal；
And close to switch, this close to switch for according to this first classification valve switch generate second feedback signal.
In one example, which includes the circumferential pre-combustion grade first order jet nozzle being classified and pre-burning along the combustion chamber
Grade secondary nozzle, the wherein fuel dispenser further include：Second classification valve, the second classification valve are coupled to the distribution valve
With selectively to the pre-combustion grade first order jet nozzle and pre-combustion grade secondary nozzle fuel feeding；And second solenoid valve, the second solenoid valve
Signal being controlled to control the switch of the second classification valve according to third, this to choose whether to the pre-combustion grade secondary nozzle fuel feeding
Three control signals are at least partially based on the working condition of engine and the third feedback signal from the second classification valve
Come what is generated.
In one example, which includes：Spool, the spool are moveable in the second classification valve
To control the switch of the second classification valve, the second classification valve when closed not to the pre-combustion grade secondary nozzle fuel feeding,
In the second solenoid valve signal is controlled to provide position of the modulation oil to adjust the spool to the second classification valve according to the third；
And close to switch, this close to switch for according to this second classification valve switch generate the third feedback signal.
According to another aspect of the present invention, a kind of engine is provided, including：Combustion chamber, the combustion chamber include main combustion stage
Nozzle and pre-combustion grade nozzle；Fuel pump, the fuel pump are used to provide fuel oil；Hydromechanical Unit, Hydromechanical Unit coupling
To the fuel pump fuel oil is measured for providing；Electronic controller, the electronic controller are anti-for generating control signal and receiving
Feedback signal；And fuel dispenser, which includes distribution valve and electrohydraulic servo valve, the distribution valve are coupled to this
Hydromechanical Unit is to receive the metering fuel oil, and the electrohydraulic servo valve is according to the first control signal control from the electronic controller
The distribution valve is made to distribute the fuel oil for being provided to the main combustion stage nozzle and the pre-combustion grade nozzle, the wherein electronic controller at least
It is based in part on the working condition of engine and the first feedback signal from the distribution valve generates the first control signal.
In one example, which includes：Spool, which is moveable in the distribution valve is divided with adjusting
Be assigned to the amount of fuel of the main combustion stage nozzle and the pre-combustion grade nozzle, wherein, the electrohydraulic servo valve according to the first control signal to
The distribution valve provides position of the modulation oil to adjust the spool；And linear displacement transducer, the linear displacement transducer are used
In perceiving the position of the spool to generate first feedback signal.
In one example, which is included along the circumferential main combustion stage first order jet nozzle being classified of the combustion chamber and main combustion
Grade secondary nozzle, the wherein fuel dispenser further include：First classification valve, the first classification valve are coupled to the distribution valve
With selectively to the main combustion stage first order jet nozzle and main combustion stage secondary nozzle fuel feeding；And first solenoid valve, first solenoid valve
The switch of the first classification valve is controlled to choose whether to the main combustion stage according to the second control signal from electronic controller
Secondary nozzle fuel feeding, the wherein electronic controller are based at least partially on the working condition of engine and live from first classification
Second feedback signal of door generates the second control signal.
In one example, which includes：Spool, the spool are moveable in the first classification valve
To control the switch of the first classification valve, the first classification valve when closed not to the main combustion stage secondary nozzle fuel feeding,
In first solenoid valve provide position of the modulation oil to adjust the spool to the first classification valve according to the second control signal；
And close to switch, this close to switch for according to this first classification valve switch generate second feedback signal.
In one example, which includes the circumferential pre-combustion grade first order jet nozzle being classified and pre-burning along the combustion chamber
Grade secondary nozzle, the wherein fuel dispenser further include：Second classification valve, the second classification valve are coupled to the distribution valve
With selectively to the pre-combustion grade first order jet nozzle and pre-combustion grade secondary nozzle fuel feeding；And second solenoid valve, the second solenoid valve
The switch of the second classification valve is controlled to choose whether to the pre-combustion grade according to the third control signal from electronic controller
Secondary nozzle fuel feeding, the wherein electronic controller are based at least partially on the working condition of engine and live from second classification
The third feedback signal of door controls signal to generate the third.
In one example, which includes：Spool, the spool are moveable in the second classification valve
To control the switch of the second classification valve, the second classification valve when closed not to the pre-combustion grade secondary nozzle fuel feeding,
In the second solenoid valve signal is controlled to provide position of the modulation oil to adjust the spool to the second classification valve according to the third；
And close to switch, this close to switch for according to this second classification valve switch generate the third feedback signal.
By all schemes of the present invention, circumferential classification is carried out, and continuously adjust burning to the nozzles at different levels of combustion chamber
The fuel delivery of room nozzles at different levels controls the equivalent proportion in combustion chamber Nei Ge regions, improve uniformity, is optimized in combustion chamber with this
Temperature, pressure, the oil-gas ratio in each region etc. so as to reach improving combustion efficiency, reduce NOx, the pollutant discharge amounts such as CO mesh
's.
Description of the drawings
After the detailed description of embodiment of the disclosure is read in conjunction with the following drawings, it better understood when the present invention's
Features described above and advantage.In the accompanying drawings, each component is not necessarily drawn to scale, and with similar correlation properties or feature
Component may have same or similar reference numeral.
Fig. 1 is the schematic diagram for showing fuel control system according to an aspect of the present invention；
Fig. 2 is the schematic diagram for the fuel dispenser for showing first embodiment according to the present invention；
Fig. 3 is the electrohydraulic servo valve and distribution valve shown in the fuel dispenser of first embodiment according to the present invention
Schematic diagram；
Fig. 4 is the schematic diagram for showing fuel dispenser according to the second embodiment of the present invention；
Fig. 5 is showing for solenoid valve in the fuel dispenser shown according to the second embodiment of the present invention and classification valve
It is intended to；And
Fig. 6 is the schematic diagram for showing fuel dispenser according to the third embodiment of the invention.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.It is note that below in conjunction with attached drawing and specifically real
The aspects for applying example description is only exemplary, and is understood not to carry out any restrictions to protection scope of the present invention.
To meet the requirement of civilian engine low stain low emission, an aspect of of the present present invention provides one kind and efficiently starts
Machine combustion scheme.According to the program, non-combusted fuels distributor can be according to the needs of the different working condition of engine, dynamically
The fuel flow of continuous adjustment supply combustion chamber nozzles at different levels, and then the equivalent proportion in combustion chamber Nei Ge regions is controlled, it reaches
Uniformly, optimize efficiency of combustion, reduce pollutant emission.
Fig. 1 shows the schematic diagram of fuel control system 100 according to an aspect of the present invention.Fuel control system 100
Including fuel pump 102, fuel pump 102 is from fuel tank pumping fuel oil with to combustion system fuel feeding.Fuel control system may also include coupling
It is connected to the Hydromechanical Unit of fuel pump 102（HMU）104.HMU104 is that the component that fuel oil is adjusted can be provided for engine, example
If HMU104 has the function of fuel metering and shutdown, so as in electronic controller（EEC）To coming from fuel pump under 110 control
102 fuel oil performs function of measuring, and the fuel oil through metering is supplied to the combustion system of engine.
Fuel control system 100 may also include fuel dispenser 106.Fuel dispenser 106 can be used for that HMU104 will be come from
Metering fuel distribution to combustion chamber 108 nozzle.The nozzle of combustion chamber 108 generally has grading design, i.e., including pre-combustion grade
Nozzle 112 and main combustion stage nozzle 114.For example, combustion chamber 108 is usually in a ring, pre-combustion grade nozzle 112 and main combustion stage nozzle
114 can be along being circular layout.As shown in Figure 1, pre-combustion grade nozzle 112 is shown with smaller patterns of openings, and main combustion stage nozzle 114 with
Larger patterns of openings is shown.
EEC110 is Full Authority Digital electronic control（FADEC）The Core Feature part of system, be in FADEC systems based on
It calculates and provides electronic control signal to executing agency to realize the controller part of FADEC control functions.According to the present invention one
Aspect, EEC110 can generate control according to the different working condition of engine by the fuel distribution demand of combustion chamber nozzles at different levels
Signal, to control the fuel distribution of fuel dispenser 106.Fuel dispenser 106 can receive the control signal from EEC110, move
State continuously adjusts the amount of fuel for distributing to pre-combustion grade nozzle 112 and main combustion stage nozzle 114.
Fig. 2 shows the schematic diagrames of the fuel dispenser 200 of first embodiment according to the present invention.As shown in Fig. 2, fuel oil
Distributor 200 may include electrohydraulic servo valve 204 and distribution valve 202.Distribution valve 202 is coupled to HMU and is measured with being received from HMU
Fuel oil.Distribution valve 202 receive metering fuel oil after by fuel distribution to main combustion stage nozzle and pre-combustion grade nozzle.Distribute valve 202
Fuel distribution be to be realized under the manipulation of electrohydraulic servo valve 204.
Electrohydraulic servo valve 204 can receive the control signal from EEC, and be passed through between HMU based on the control signal
Control is oily and modulates oil between distribution valve 202 to manipulate the valve opening size of distribution valve 202, distinguishes so as to adjust
The amount of fuel of main combustion stage nozzle and pre-combustion grade nozzle is supplied to, this is described in detail below in conjunction with Fig. 3.Distributing valve 202 can be to EEC
Feedback signal is sent, EEC can generate the control to electrohydraulic servo valve according to the feedback signal and the working condition of engine
Signal.
The valve opening size of distribution valve 202 decides the flow resistance of main combustion stage runner.Therefore, electrohydraulic servo valve 204 is logical
The flow resistance of main combustion stage runner can be adjusted, and then control and be supplied to main combustion stage by crossing the valve opening size of control distribution valve 202
Amount of fuel, remaining fuel oil flow directly into pre-combustion grade, as shown in Figure 2.However, this, which only distributes valve 202, distributes fuel oil
A kind of illustrative and not restrictive example skilled addressee readily understands that can have other specific methods of salary distribution, such as is come
Distribution valve 202 is all flowed through from the metering fuel oil of HMU, pre-combustion grade fuel oil is also to be flowed out from distribution valve 202.
When the working condition of engine is under underload working condition, so as to combustion chamber fuel demand amount it is smaller when, EEC
Generation control signal is completely closed with that will distribute valve 202, so as to cut off main combustion stage runner, measures fuel oil at this time all by pre-burning
Grade nozzle feeds combustion chamber.When the working condition of engine is under high load capacity working condition, combustion chamber fuel demand amount is larger
When, EEC is opened with that will distribute valve 202 to different apertures according to the different duty requirements generation control signal under high load capacity.
In such a state, the amount of fuel for separately flowing into pre-combustion grade nozzle and main combustion stage nozzle can be adjusted.
Fig. 3 shows electrohydraulic servo valve and distribution valve in the fuel dispenser of first embodiment according to the present invention
Schematic diagram.As shown in figure 3, distribution valve 320 may include moveable spool 324.The movement of spool 324 to distribute valve
320 valve opening changes, so as to play the role of adjusting distribution to the amount of fuel of main combustion stage nozzle and pre-combustion grade nozzle.
Distribution valve 320 may also include linear displacement transducer 322, such as linear variable difference transformer（LVDT）, to sense spool
Position, i.e. valve aperture size, and EEC returns to feedback signal to indicate the location information.
Electrohydraulic servo valve 310 may include torque-motor 312 and hydraulic efficiency slide valve 314.EEC according to the working condition of engine and
Feedback signal from distribution valve 320 judges the optimum oil feeding of atomizers at different levels, and correspondingly generates control signal to carry
Supply electrohydraulic servo valve 310, such as the offset of the valve opening size, i.e. spool of control signal designation distribution valve 320
Position.The torque-motor 310 of electrohydraulic servo valve 310 receives the control signal, according to the position of spool, generates suitable torque
To control hydraulic efficiency slide valve 314.Hydraulic efficiency slide valve is lived under the torque that HMU receives control oil and applies in torque-motor 312 to distribution
Door 320 provides modulation oil.The modulation oil of flow direction distribution valve 320 includes two control chambers of flow direction distribution valve 320 respectively
High-voltage modulation oil and low-pressure adjusting liquefaction.By controlling the pressure of control chamber, the offset of the position of valve spool 324 is realized.Straight line
Displacement sensor 322 may be coupled to the position of the spool 324 to perceive spool 324, and generate the feedback signal for being supplied to EEC.
According to the scheme of above-described embodiment, can be continuously adjusted on demand to burning under each oil condition of engine
Fuel delivery between room pre-combustion grade and main combustion stage nozzle so as to optimize the efficiency of combustion of engine chamber, reduces engine pollution
Object discharge capacity.
Fig. 4 shows the schematic diagram of fuel dispenser according to the second embodiment of the present invention.In this embodiment, it burns
The main combustion stage nozzle of room 500 is classified to main combustion stage first order jet nozzle 504 and main combustion stage secondary nozzle 506 on circumferential direction.Such as Fig. 4 institutes
Show, main combustion stage nozzle includes the main combustion stage first order jet nozzle 504 along the upper semicircumference of toroidal combustion chamber and the main combustion along lower half circumference
Grade secondary nozzle 506.However, this is the illustrative and not restrictive example of the classification of main combustion stage nozzle.People in the art
Member is readily appreciated that other circumferential classifications, if such as combustion chamber 500 be divided into four quadrants, first and third quadrant main combustion stage
Nozzle is divided into main combustion stage first order jet nozzle, second and the main combustion stage nozzle of fourth quadrant be divided into main combustion stage secondary nozzle,
Or several nozzles on circumferential direction are spaced and are divided into main combustion stage first order jet nozzle and main combustion stage secondary nozzle.
Difference lies in addition to 404 He of electrohydraulic servo valve with the fuel dispenser 200 of Fig. 2 for the fuel dispenser 400 of Fig. 4
It distributes except valve 402, fuel dispenser 400 may also include solenoid valve 408 and classification valve 406.Electrohydraulic servo valve 404 and point
The operation of electrohydraulic servo valve 204 and distribution valve 202 in operation and Fig. 2 with valve 402 is similar, repeats no more.
As shown in figure 4, classification valve 406 may be coupled to distribution valve 402 to receive the fuel oil for distributing to main combustion stage, and select
Selecting property to 506 fuel feeding of main combustion stage first order jet nozzle 504 and main combustion stage secondary nozzle.Specifically, classification valve 406 may include switching
Two states.Under open state, the runner towards main combustion stage secondary nozzle 506 is opened, and the fuel oil from distribution valve 402 is same
When be provided to main combustion stage first order jet nozzle 504 and main combustion stage secondary nozzle 506, under off status, towards main combustion stage secondary nozzle 506
Runner be cut off, from distribution valve 402 fuel oil flow to main combustion stage first order jet nozzle 504 completely.
The on off state for being classified valve 406 is to manipulate realization by solenoid valve 408.Solenoid valve 408 can be received from EEC's
Signal is controlled, and is grasped based on the control signal by the control oil between HMU and the modulation oil between classification valve 406
The switch of vertical classification valve 406, so as to control to choose whether that this is below in conjunction with Fig. 5 to 406 fuel feeding of main combustion stage secondary nozzle
Detailed description.Being classified valve 406 can be to EEC feedback signal, so as to which EEC can be according to the feedback signal and the work shape of engine
State generates the control signal to solenoid valve 408.
When the working condition of engine is under underload working condition, so as to combustion chamber fuel demand amount it is smaller when, EEC
Generation control signal is completely closed with that will distribute valve 202, so as to cut off main combustion stage runner, measures fuel oil at this time all by pre-burning
Grade nozzle 502 feeds combustion chamber 500.
When the working condition of engine gradually switchs to higher load from underload, so as to which combustion chamber fuel demand amount is larger
When, EEC generates control signal so that electrohydraulic servo valve 404 to be controlled to be opened valve 402 is distributed to difference according to different duty requirements
Aperture, while generate control signal with control solenoid valve 408 close classification valve 406.In such a state, while to pre-
Grade nozzle 502 and 504 fuel feeding of main combustion stage first order jet nozzle are fired, and control of the signal to distribution valve 402 is controlled by EEC,
The amount of fuel for separately flowing into pre-combustion grade nozzle 502 and main combustion stage first order jet nozzle 504 can be adjusted.
When the working condition of engine switchs to more high load capacity, thus during the fuel demand amount bigger of combustion chamber, EEC is according to the work
Make the fuel demand generation control signal of state so that solenoid valve 408 to be controlled to open classification valve 406.At this point, by distributing valve
402 fuel oils for distributing to main combustion stage flow to main combustion stage first order jet nozzle 504 and main combustion stage secondary nozzle 506, and pass through EEC simultaneously
Control signal to distribute valve 402 control, can adjust and separately flow into pre-combustion grade nozzle 502 and main combustion stage first order jet nozzle
504th, the amount of fuel of main combustion stage secondary nozzle 506.
Fig. 5 shows the signal of the solenoid valve and classification valve in fuel dispenser according to the second embodiment of the present invention
Figure.As shown in figure 5, similar to distribution valve, classification valve 520 may also comprise spool 524.The movement of spool 524 to be classified
The on off state of valve 520 changes, so as to play the role of the switch of control classification valve 520.Classification valve 520 may be used also
Including close to switch to sense the position of spool, so as to sense the switch of classification valve 520, and to EEC return feedback signal with
Indicate the on off state of classification valve 520.
Solenoid valve 510 may include electromagnetic assembly 512, and the break-make of the electromagnetic assembly 512 can change solenoid valve 510 and classification
The runner of modulation oil between valve 520.For example, under conducting state and the off state conversion of electromagnetic assembly 512, solenoid valve
510, which lead to the high pressure runner of the modulation oil of classification valve 520 and low pressure runner, also can correspondingly change, such as former high pressure runner becomes
For low pressure runner, and low pressure runner becomes high pressure runner, and vice versa.At this point, the variation of high-low pressure runner causes to be classified valve
The opposite high-low pressure of 520 both sides control chamber changes, and the position so as to allow spool 524 changes, and causes to be classified valve
The switching of 520 switch.
During operation, EEC judges whether needs according to the working condition of engine and the feedback signal from classification valve 520
To main combustion stage secondary nozzle fuel feeding, and control signal is correspondingly generated according to this to be supplied to the control classification valve 520 of solenoid valve 510
Switch.Solenoid valve 510 is according to the control signal come the switch of Nagivating hierarchically valve 520.The valve is may be coupled to close to switch 522
Core 524 perceives the on off state of classification valve 520, and generate the feedback letter for being supplied to EEC to perceive the position of spool 524
Number.
According to above-described embodiment, by the classification to main combustion stage nozzle on circumferential direction, more subtly adjust on demand to combustion
The fuel delivery between room pre-combustion grade, main combustion stage firsts and seconds nozzle is burnt, has advanced optimized the efficiency of combustion of engine chamber,
Reduce engine pollutant discharge amount.
In addition, under some fuel supply flow rate states, closed by controlling solenoid valve with valve will be classified so that only main combustion
Grade first order jet nozzle fuel feeding realizes classification of the main combustion stage nozzle on circumferential direction, due to the reduction of fuel nozzle, increases single-nozzle
On fuel flow, i.e., larger fuel pressure drop on nozzle is generated with smaller fuel flow, thus promotes the atomization effect of fuel oil
The requirement for reducing pollutant emission is realized in fruit, cooperation combustion chamber.
Fig. 6 is the schematic diagram for showing fuel dispenser according to the third embodiment of the invention.In this embodiment, it fires
Room 700 is burnt other than main combustion stage nozzle is classified to main combustion stage first order jet nozzle 706 and main combustion stage secondary nozzle 708 on circumferential direction,
Pre-combustion grade nozzle is also classified to pre-combustion grade first order jet nozzle 702 and pre-combustion grade secondary nozzle 704 on circumferential direction.It is as shown in the figure, pre-
It fires grade nozzle and includes the pre-combustion grade first order jet nozzle 702 along the upper semicircumference of toroidal combustion chamber and the pre-combustion grade two level along lower half circumference
Nozzle 504.However, this is the illustrative and not restrictive example of the classification of pre-combustion grade nozzle.Those skilled in the art are easy
Understand other circumferential classifications, if such as combustion chamber 500 be divided into four quadrants, first and third quadrant pre-combustion grade nozzle quilt
Be divided into pre-combustion grade first order jet nozzle, second and the pre-combustion grade nozzle of fourth quadrant be divided into pre-combustion grade secondary nozzle or circumferential direction
On several nozzles be spaced and be divided into pre-combustion grade first order jet nozzle and pre-combustion grade secondary nozzle.
Difference lies in addition to electrohydraulic servo valve 604 and distribution with the fuel dispenser of Fig. 4 for the fuel dispenser 600 of Fig. 6
Except valve 602 and solenoid valve 608 and classification valve 606, fuel dispenser 600 may also include solenoid valve 612 and classification is lived
Door 610.Electrohydraulic servo valve 604 and distribution valve 602 and solenoid valve 608 and the electricity being classified in the operation and Fig. 4 of valve 606
The operation of hydraulic servo 404 and distribution valve 402 and solenoid valve 408 and classification valve 406 is similar, repeats no more.
As shown in the figure, classification valve 610 may be coupled to distribution valve 602 with selectively to pre-combustion grade first order jet nozzle 702
With 704 fuel feeding of pre-combustion grade secondary nozzle.Specifically, classification valve 610 may include switching two states.Under open state, lead to
The runner of pre-combustion grade secondary nozzle 704 is opened, and the fuel oil that distribution valve 602 distributes to pre-combustion grade is simultaneously provided to pre-combustion grade one
Grade nozzle 702 and pre-combustion grade secondary nozzle 704, under off status, the runner towards main combustion stage secondary nozzle 506 is cut off, point
The fuel oil that pre-combustion grade is distributed to valve 602 flows to pre-combustion grade first order jet nozzle 702 completely.
The on off state for being classified valve 610 is to manipulate realization by solenoid valve 612.Solenoid valve 612 can be received from EEC's
Signal is controlled, and is grasped based on the control signal by the control oil between HMU and the modulation oil between classification valve 610
The switch of vertical classification valve 610, so as to control to choose whether to 704 fuel feeding of pre-combustion grade secondary nozzle.Being classified valve 610 can be to
EEC feedback signals, so as to which EEC can generate the control to solenoid valve 612 according to the feedback signal and the working condition of engine
Signal processed.
When the working condition of engine is in very under underload working condition, during so as to combustion chamber fuel demand amount very little,
EEC generation control signal completely closed with that will distribute valve 602, so as to cut off main combustion stage runner, at the same generate control signal with
Classification valve 610 is closed, so as to cut off pre-combustion grade two level runner, measures fuel oil at this time all by pre-combustion grade first order jet nozzle 702
Feed combustion chamber 700.
When the working condition of engine switchs to more slightly higher load condition, so as to combustion chamber fuel demand amount it is slightly higher when,
EEC generation control signal completely closed with that will distribute valve 602, so as to cut off main combustion stage runner, at the same generate control signal with
Classification valve 610 is opened, so as to which pre-combustion grade two level runner be connected, measures fuel oil at this time simultaneously by pre-combustion grade first order jet nozzle 702
Combustion chamber 700 is fed with pre-combustion grade secondary nozzle 704.
When the working condition of engine switchs to higher load operating mode, so as to combustion chamber fuel demand amount it is higher when, in addition to making
Except classification valve 610 is kept open, the control signal of EEC generations also opens distribution valve 602 to different apertures,
Control signal is generated simultaneously so that solenoid valve 608 to be controlled to close classification valve 606.In such a state, while to pre-combustion grade one
Grade 706 fuel feeding of nozzle 702, pre-combustion grade secondary nozzle 704 and main combustion stage first order jet nozzle, and by the control signal of EEC to point
Control with valve 602 can adjust and separately flow into pre-combustion grade first order jet nozzle 702, pre-combustion grade secondary nozzle 704 and main combustion stage one
The amount of fuel of grade nozzle 706.
When the working condition of engine switchs to very high load capacity operating mode, thus when combustion chamber fuel demand amount is very high, EEC is generated
Control signal also control solenoid valve 608 open classification valve 606.In such a state, distribution valve 602 distributes to main combustion
The fuel oil of grade flows to main combustion stage first order jet nozzle 706 and main combustion stage secondary nozzle 708 simultaneously.By the control signal of EEC to distribution
The control of valve 602 can adjust and separately flow into pre-combustion grade first order jet nozzle 702, pre-combustion grade secondary nozzle 704 and main combustion stage one
The amount of fuel of grade nozzle 706, main combustion stage secondary nozzle 708.
Note that in figure 6, control signal quilts of the EEC to electrohydraulic servo valve 604, to solenoid valve 608 and to solenoid valve 612
Be shown as three independent control signals, however it should be readily apparent to one skilled in the art that EEC can also generate be simultaneously input to it is electro-hydraulic
The entirety control signal of servo valve 604, solenoid valve 608 and solenoid valve 612.
The detailed construction and maneuverability pattern and solenoid valve 608 and classification 606 phase of valve of solenoid valve 612 and classification valve 610
Seemingly, therefore not to repeat here.
It is more smart by the classification to both main combustion stage nozzle and pre-combustion grade nozzle on circumferential direction according to above-described embodiment
The fuel delivery between combustion chamber pre-combustion grade firsts and seconds and main combustion stage firsts and seconds nozzle carefully is continuously adjusted on demand,
The efficiency of combustion of engine chamber has been advanced optimized, has reduced engine pollutant discharge amount.
In addition, under some fuel supply flow rate states, closed by controlling solenoid valve with valve will be classified so that can only have
Pre-combustion grade first order jet nozzle or main combustion stage first order jet nozzle fuel feeding realize the classification of main combustion stage nozzle and pre-combustion grade nozzle on circumferential direction,
Due to the reduction of fuel nozzle, increase the fuel flow on single-nozzle, i.e., with smaller fuel flow generate nozzle on compared with
Big fuel pressure drop, thus promotes the atomizing effect of fuel oil, and the requirement for reducing pollutant emission is realized in cooperation combustion chamber.
The fuel dispenser system of the present invention is described above in association with embodiment, but it is to be understood that the scope of the present invention is simultaneously
It is not limited to above-described embodiment.There is distribution valve and pre-combustion grade nozzle is carried out for example, fuel dispenser can also be realized into only
The classification valve of circumferential direction classification, the classification valve without carrying out circumferential classification to main combustion stage nozzle.
By all schemes of the present invention, circumferential classification is carried out, and continuously adjust burning to the nozzles at different levels of combustion chamber
The fuel delivery of room nozzles at different levels controls the equivalent proportion in combustion chamber Nei Ge regions, improve uniformity, is optimized in combustion chamber with this
Temperature, pressure, the oil-gas ratio in each region etc. so as to reach improving combustion efficiency, reduce NOx, the pollutant discharge amounts such as CO mesh
's.
Offer is for so that any person skilled in the art all can make or use this public affairs to the previous description of the disclosure
It opens.The various modifications of the disclosure all will be apparent, and as defined herein general for a person skilled in the art
Suitable principle can be applied to spirit or scope of other variants without departing from the disclosure.The disclosure is not intended to be limited as a result,
Due to example described herein and design, but should be awarded and principle disclosed herein and novel features phase one
The widest scope of cause.
Claims (11)
1. a kind of fuel dispenser, including：
Valve is distributed, the distribution valve receives metering fuel oil and sprayed to distribute the main combustion stage nozzle for being provided to combustion chamber and pre-combustion grade
The fuel oil of mouth；And
Electrohydraulic servo valve, the electrohydraulic servo valve control the distribution valve to be provided to institute to distribute according to first control signal
The fuel oil of main combustion stage nozzle and the pre-combustion grade nozzle is stated, the first control signal is at least partially based on the work of engine
Make state and from it is described distribution valve the first feedback signal generation,
The main combustion stage nozzle includes the circumferential main combustion stage first order jet nozzle being classified and main combustion stage secondary nozzle along the combustion chamber,
Wherein described fuel dispenser further includes：
First classification valve, the first classification valve are coupled to the distribution valve with selectively to the main combustion stage level-one
Nozzle and main combustion stage secondary nozzle fuel feeding；And
First solenoid valve, first solenoid valve are classified the switch of valve to select according to second control signal control described first
Whether to the main combustion stage secondary nozzle fuel feeding, the second control signal is at least partially based on the working condition of engine
It is generated with the second feedback signal from the described first classification valve.
2. fuel dispenser as described in claim 1, which is characterized in that the distribution valve includes：
Spool, the spool are moveable to adjust distribution to the main combustion stage nozzle and described pre- in the distribution valve
The amount of fuel of grade nozzle is fired, wherein, the electrohydraulic servo valve provides tune according to the first control signal to the distribution valve
Liquefaction is to adjust the position of the spool；And
Linear displacement transducer, the linear displacement transducer are fed back for perceiving the position of the spool with generating described first
Signal.
3. fuel dispenser as claimed in claim 2, the linear displacement transducer includes linear variable difference transformer.
4. fuel dispenser as described in claim 1, which is characterized in that the first classification valve includes：
Spool, the spool are moveable the switch to control the first classification valve in the described first classification valve,
The first classification valve is not when closed to the main combustion stage secondary nozzle fuel feeding, wherein first solenoid valve is according to
Second control signal provides modulation oil to adjust the position of the spool to the described first classification valve；And
It is described to generate second feedback signal close to switch for being classified the switch of valve according to described first close to switch.
5. fuel dispenser as described in claim 1, which is characterized in that the pre-combustion grade nozzle is included along the combustion chamber
The pre-combustion grade first order jet nozzle and pre-combustion grade secondary nozzle of circumferential direction classification, wherein the fuel dispenser further includes：
Second classification valve, the second classification valve are coupled to the distribution valve with selectively to the pre-combustion grade level-one
Nozzle and pre-combustion grade secondary nozzle fuel feeding；And
Second solenoid valve, the second solenoid valve control the switch of signal control the second classification valve to select according to third
Whether to the pre-combustion grade secondary nozzle fuel feeding, the third control signal is at least partially based on the working condition of engine
It is generated with the third feedback signal from the described second classification valve.
6. fuel dispenser as claimed in claim 5, which is characterized in that the second classification valve includes：
Spool, the spool are moveable the switch to control the second classification valve in the described second classification valve,
The second classification valve is not when closed to the pre-combustion grade secondary nozzle fuel feeding, wherein the second solenoid valve is according to
Third controls signal to provide modulation oil to the described second classification valve to adjust the position of the spool；And
It is described to generate the third feedback signal close to switch for being classified the switch of valve according to described second close to switch.
7. a kind of engine, including：
Combustion chamber, the combustion chamber include main combustion stage nozzle and pre-combustion grade nozzle；
Fuel pump, the fuel pump are used to provide fuel oil；
Hydromechanical Unit, the Hydromechanical Unit are coupled to the fuel pump and measure fuel oil for providing；
Electronic controller, the electronic controller is for generation control signal and receives feedback signal；And
Fuel dispenser, the fuel dispenser include distribution valve and electrohydraulic servo valve, and the distribution valve is coupled to described
Hydromechanical Unit is to receive the metering fuel oil, and the electrohydraulic servo valve is according to the first control from the electronic controller
The signal control distribution valve is provided to the fuel oil of the main combustion stage nozzle and the pre-combustion grade nozzle to distribute, wherein described
Electronic controller is based at least partially on the working condition of engine and the first feedback signal generation from the distribution valve
The first control signal,
The main combustion stage nozzle includes the circumferential main combustion stage first order jet nozzle being classified and main combustion stage secondary nozzle along the combustion chamber,
Wherein described fuel dispenser further includes：
First classification valve, the first classification valve are coupled to the distribution valve with selectively to the main combustion stage level-one
Nozzle and main combustion stage secondary nozzle fuel feeding；And
First solenoid valve, first solenoid valve is according to the second control signal control described first from the electronic controller
The switch of valve is classified to choose whether to the main combustion stage secondary nozzle fuel feeding, wherein the electronic controller is at least partly
Based on engine working condition and from described first classification valve the second feedback signal come generate it is described second control letter
Number.
8. engine as claimed in claim 7, which is characterized in that the distribution valve includes：
Spool, the spool are moveable to adjust distribution to the main combustion stage nozzle and described pre- in the distribution valve
The amount of fuel of grade nozzle is fired, wherein, the electrohydraulic servo valve provides tune according to the first control signal to the distribution valve
Liquefaction is to adjust the position of the spool；And
Linear displacement transducer, the linear displacement transducer are fed back for perceiving the position of the spool with generating described first
Signal.
9. engine as claimed in claim 7, which is characterized in that the first classification valve includes：
Spool, the spool are moveable the switch to control the first classification valve in the described first classification valve,
The first classification valve is not when closed to the main combustion stage secondary nozzle fuel feeding, wherein first solenoid valve is according to
Second control signal provides modulation oil to adjust the position of the spool to the described first classification valve；And
It is described to generate second feedback signal close to switch for being classified the switch of valve according to described first close to switch.
10. engine as claimed in claim 7, which is characterized in that the pre-combustion grade nozzle includes the ring along the combustion chamber
To the pre-combustion grade first order jet nozzle of classification and pre-combustion grade secondary nozzle, wherein the fuel dispenser further includes：
Second classification valve, the second classification valve are coupled to the distribution valve with selectively to the pre-combustion grade level-one
Nozzle and pre-combustion grade secondary nozzle fuel feeding；And
Second solenoid valve, the second solenoid valve is according to the third control signal control described second from the electronic controller
The switch of valve is classified to choose whether to the pre-combustion grade secondary nozzle fuel feeding, wherein the electronic controller is at least partly
The third control signal is generated based on the third feedback signal from the described second classification valve.
11. engine as claimed in claim 10, which is characterized in that the second classification valve includes：
Spool, the spool are moveable the switch to control the second classification valve in the described second classification valve,
The second classification valve is not when closed to the pre-combustion grade secondary nozzle fuel feeding, wherein the second solenoid valve is according to
Third controls signal to provide modulation oil to the described second classification valve to adjust the position of the spool；And
It is described to generate the third feedback signal close to switch for being classified the switch of valve according to described second close to switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310666254.2A CN104696126B (en) | 2013-12-10 | 2013-12-10 | Fuel dispenser and the engine using the fuel dispenser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310666254.2A CN104696126B (en) | 2013-12-10 | 2013-12-10 | Fuel dispenser and the engine using the fuel dispenser |
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| Publication Number | Publication Date |
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| CN104696126A CN104696126A (en) | 2015-06-10 |
| CN104696126B true CN104696126B (en) | 2018-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310666254.2A Active CN104696126B (en) | 2013-12-10 | 2013-12-10 | Fuel dispenser and the engine using the fuel dispenser |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108035829B (en) * | 2017-11-08 | 2021-08-06 | 中国航发北京航科发动机控制系统科技有限公司 | Fuel control device for large passenger plane engine |
| CN109578151B (en) * | 2019-01-31 | 2020-12-29 | 中国航发动力股份有限公司 | Fuel distributor of gas turbine |
| CN114033557B (en) * | 2021-11-30 | 2022-12-06 | 中国航发湖南动力机械研究所 | Function integration fuel valve assembly |
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| CN1069561A (en) * | 1991-08-12 | 1993-03-03 | 通用电气公司 | The fuel supply system of double annular combustion chamber |
| US5442922A (en) * | 1993-12-09 | 1995-08-22 | United Technologies Corporation | Fuel staging system |
| CN102144131A (en) * | 2008-09-08 | 2011-08-03 | 西门子能源公司 | Method and system for controlling fuel to a dual stage nozzle |
| CN103161631A (en) * | 2011-12-12 | 2013-06-19 | 中航商用航空发动机有限责任公司 | Fuel oil distributor used in motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4337616A (en) * | 1980-04-14 | 1982-07-06 | General Motors Corporation | Fuel air ratio controlled fuel splitter |
| CN1069561A (en) * | 1991-08-12 | 1993-03-03 | 通用电气公司 | The fuel supply system of double annular combustion chamber |
| US5442922A (en) * | 1993-12-09 | 1995-08-22 | United Technologies Corporation | Fuel staging system |
| CN102144131A (en) * | 2008-09-08 | 2011-08-03 | 西门子能源公司 | Method and system for controlling fuel to a dual stage nozzle |
| CN103161631A (en) * | 2011-12-12 | 2013-06-19 | 中航商用航空发动机有限责任公司 | Fuel oil distributor used in motor |
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| CN104696126A (en) | 2015-06-10 |
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