CN206256953U - A kind of exhaust boundary Control device of single-cylinder engine - Google Patents
A kind of exhaust boundary Control device of single-cylinder engine Download PDFInfo
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- CN206256953U CN206256953U CN201621366624.6U CN201621366624U CN206256953U CN 206256953 U CN206256953 U CN 206256953U CN 201621366624 U CN201621366624 U CN 201621366624U CN 206256953 U CN206256953 U CN 206256953U
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Abstract
The utility model is related to a kind of exhaust boundary Control device of single-cylinder engine, the exhaust boundary Control device includes exhaust expansion pipe, exhaust tube of pressure-stabilizing and the pressure at expulsion coarse adjustment valve and pressure at expulsion fine tuning valve that are arranged in parallel, and the exhaust boundary Control device can be such that single-cylinder engine is obtained and the basically identical stable state pressure at expulsion of whole machine and/or exhaust pressure wave in scavenging period.Thereby, it is possible to the exhaust border of the whole machine of accurate simulation multi-cylinder in single-cylinder engine, so as to the scavenging process to the whole machine of multi-cylinder carries out accurate simulation more accurately to predict the performance of the whole machine of multi-cylinder.
Description
Technical field
The utility model is related to the gas extraction system of engine, in particular it relates to a kind of exhaust border control of single-cylinder engine
Device processed.
Background technology
Single-cylinder engine has design, is simple to manufacture, each parameter independence is strong during experiment, it is few to change testpieces quantity,
The advantages of experimentation cost is greatly reduced, is a kind of conventional testing machine.In engine new architecture R＆D process, it is necessary to first lead to
Cross single-cylinder engine experiment sieving parts matching scheme, the reliability of checking main parts size, with reduce the experiment of whole machine into
Sheet and development risk.For big-block engine peculiar to vessel, because whole machine cost is high, experimentation cost is high, simulated by single-cylinder engine
Whole machine carries out parts exploitation in advance and performance verification experiment just seems even more important.
The stage that engine intake valve is opened, air bleeding valve is not yet closed is scavenging process, and the quality of scavenging quality can influence
Residual waste gas quantity in cylinder, so that combustion process is influenceed, while heat in the cylinder that also influence scavenging is taken away, so as to influence to be heated zero
Part thermic load.The principal element for influenceing scavenging process is the pressure difference between the admission pressure in this stage and pressure at expulsion.
When whole machine simulated test is carried out using single-cylinder engine, due to there is exhaust interference between each cylinder of whole machine, exhaust
Pressure oscillation is larger, it is difficult to which the pressure wave in exhaust duct is accurately controlled.It is a variety of above to cause single-cylinder engine
Exhaust boundary condition it is different from the exhaust boundary condition of whole machine so that the scavenging process of single-cylinder engine and whole machine are not
Together, cause combustion process and part heat load has larger difference with whole machine.
Therefore, in order to realize accurately simulating whole working using single-cylinder engine, it is necessary to propose a kind of
The exhaust boundary Control device of single-cylinder engine, so as to solve above-mentioned deficiency of the prior art.
Utility model content
A series of concept of reduced forms is introduced in utility model content part, this will be in specific embodiment part
Middle further description.Utility model content part of the present utility model is not meant to attempt to limit claimed
Technical scheme key feature and essential features, the guarantor for attempting to determine technical scheme required for protection is not meant that more
Shield scope.
In order to solve above-mentioned deficiency of the prior art, the utility model discloses a kind of exhaust border of single-cylinder engine
Control device, the exhaust boundary Control device is used to accurately simulate the exhaust boundary condition of whole machine, wherein the exhaust boundary Control
Device includes：Exhaust expansion pipe, the exhaust expansion pipe is connected to the exhaust outlet of single-cylinder engine by pipeline, the exhaust expansion pipe
It is the cylindrical pipe with certain diameter and length, by the diameter and length that change the exhaust expansion pipe such that it is able to change
The waveform of the pressure wave of the exhaust for flowing through；Exhaust tube of pressure-stabilizing, the exhaust tube of pressure-stabilizing is connected to the exhaust expansion pipe by pipeline,
So as to receive the exhaust from the exhaust expansion pipe with the pressure of stabilization exhaust；Pressure at expulsion coarse adjustment valve and pressure at expulsion fine tuning
Valve, the pressure at expulsion coarse adjustment valve and pressure at expulsion fine tuning valve are connected to going out for the exhaust tube of pressure-stabilizing in the way of being arranged in parallel
Mouth end, the pressure at expulsion coarse adjustment valve and pressure at expulsion fine tuning valve are constructed to be permeable to adjustment aperture to adjust the steady of the exhaust for flowing through
State pressure；Exhaust main, the exhaust main is connected to the port of export of the pressure at expulsion coarse adjustment valve and pressure at expulsion fine tuning valve
It is discharged to the outside in environment with the exhaust for receiving exhaust and will receive.
The exhaust boundary Control device of the single-cylinder engine in the utility model, the row with existing single-cylinder engine
Gas system is compared, by changing the parameter of the part that can adjust pressure and/or pressure waveform in control device, can be in list
The pressure at expulsion and/or pressure waveform of whole machine are relatively accurately simulated in Cylinder engine such that it is able to more accurately simulate whole machine
Scavenging process and the whole machine of prediction performance.
Preferably, the exhaust boundary Control device includes multiple exhaust expansion pipes with different-diameter and length, leads to
Cross the waveform for changing the exhaust expansion pipe with different-diameter and length to change the pressure wave of the exhaust for flowing through.
According to preferred exhaust boundary Control device, by set in control device multiple can adjust pressure and/or
The part of pressure waveform, can relatively accurately simulate the pressure at expulsion and/or pressure waveform of whole machine in single-cylinder engine, so that
The scavenging process of whole machine and the performance of the whole machine of prediction can more accurately be simulated.
Preferably, the pipeline for being connected to single-cylinder engine of the exhaust expansion pipe is exhaust resonatron, and the exhaust is humorous
Vibration tube is constructed to be permeable to the waveform of the exhaust pressure wave for adjusting single-cylinder engine.
It is exhaust resonatron by by circuit design according to preferred exhaust boundary Control device, can further improves
Ability and the regulation free degree that the waveform of exhaust pressure wave is adjusted.
Preferably, the pressure at expulsion coarse adjustment valve and pressure at expulsion fine tuning valve are the valve of Electronic control, wherein to open
The mode of ring control controls the aperture of the pressure at expulsion coarse adjustment valve, and the pressure at expulsion fine tuning is controlled in the way of closed-loop control
The aperture of valve.
According to preferred exhaust boundary Control device, throttling control can be carried out to exhaust, so as to adjust the exhaust side
Pressure at expulsion in boundary's control device.
Preferably, also including being arranged on the pressure sensor of the exhaust expansion pipe upstream, wherein the pressure sensor
Gather into the exhaust expansion pipe exhaust pressure and by the pressure conversion for control signal feeds back to the pressure at expulsion
Fine tuning valve, so as to realize being controlled in the way of closed-loop control the aperture of the pressure at expulsion fine tuning valve.
According to preferred exhaust boundary Control device, the control signal that can be transmitted according to back pressure transducer is to exhaust
Throttling control is carried out, so as to improve the automaticity of pressure at expulsion regulation.
Preferably, also exhaust gas post-treatment device and muffler including being arranged on the exhaust main.
According to preferred exhaust boundary Control device, exhaust gas post-treatment device under real engine operating condition can be simulated
The influence brought to exhaust back pressure with muffler so that the test run of single-cylinder engine more approaches the reality of engine
Border applying working condition.
Brief description of the drawings
The drawings below of the utility model embodiment is new for understanding this practicality in this as a part of the present utility model
Type.Shown in the drawings of implementation method of the present utility model and its description, for explaining principle of the present utility model.In accompanying drawing
In,
Fig. 1 is the schematic diagram of the exhaust boundary Control device according to a preferred embodiment of the present utility model；
Fig. 2 is the structural representation according to exhaust expansion pipe of the present utility model；
Fig. 3 is the exhaust pressure wave comparison diagram of the exhaust expansion pipe according to different-diameter of the present utility model；
Fig. 4 is the exhaust pressure wave comparison diagram of the exhaust expansion pipe according to different length of the present utility model；
Fig. 5 is to be schemed according to the pressure at expulsion contrast experiment of the control device with exhaust expansion pipe of the present utility model.
Description of reference numerals：
1st, intake simulation pressure charging system 2, single-cylinder engine 3, exhaust resonatron
4th, exhaust expansion pipe 5, exhaust tube of pressure-stabilizing 6, pressure at expulsion coarse adjustment valve
7th, pressure at expulsion fine tuning valve 8, back pressure transducer 9, exhaust gas post-treatment device
10th, muffler
Specific embodiment
In the following description, a large amount of concrete details are given and the utility model is more thoroughly managed to provide
Solution.It will be apparent, however, to one skilled in the art that the utility model embodiment can be without one or more
These details and be carried out.In other examples, in order to avoid obscuring with the utility model embodiment, for ability
Some technical characteristics known to domain are not described.
In order to thoroughly understand the utility model embodiment, detailed structure will be proposed in following description.Obviously, this reality
The specific details that those skilled in the art is familiar with are not limited to the execution of new embodiment.It is of the present utility model preferable
Embodiment is described in detail as follows, but in addition to these detailed descriptions, the utility model can also have other embodiment.
According to one side of the present utility model, there is provided a kind of exhaust boundary Control device of single-cylinder engine, the exhaust
Boundary Control device is used to accurately simulate the exhaust boundary condition of whole machine.Specifically in the present embodiment, the single-cylinder engine is ship
With the single cylinder diesel of diesel engine, it is understood by one of ordinary skill in the art that the single-cylinder engine is not limited to be marine diesel oil
Machine, but can be also used for the engines such as other land diesel engines or gasoline engine.Those skilled in the art can manage
Solution, the exhaust border of engine refers to for example when engine test is carried out, is not limited to pressure at expulsion and exhaust pressure wave
Waveform is in interior output condition.When whole machine operation simulation is carried out using single-cylinder engine, it is necessary to make discharge single-cylinder engine
The boundary condition of exhaust be set as with the exhaust boundary condition of whole machine it is basically identical so that the scavenging process of single cylinder engine and whole machine
It is similar, and then the performance of the whole machine of multi-cylinder is predicted exactly.
In the embodiment described by accompanying drawing 1, the system that a kind of use single-cylinder engine machine simulates the whole machine of multi-cylinder is shown,
The system includes：Intake simulation pressure charging system 1 for simulating the whole machine air inlet of multi-cylinder；Single-cylinder engine 2, intake simulation supercharging
System 1 is connected to the single-cylinder engine 2 by pipeline, so as to be supplied to single-cylinder engine 2 in the way of to simulate the whole machine air inlet of multi-cylinder
To air inlet；Exhaust boundary Control device, the exhaust boundary Control device is connected to the exhaust outlet of single-cylinder engine 2, so that will be single
Exhaust after the completion of being done work in Cylinder engine 2 is discharged to the outside environment.
As shown in figure 1, the exhaust boundary Control device includes：Exhaust expansion pipe 4, the exhaust expansion pipe 4 is connected by pipeline
The exhaust outlet of single-cylinder engine is connected to, the exhaust expansion pipe is configured to change length L and diameter D to change the exhaust for flowing through
The waveform of pressure wave, it is preferable that the pressure at expulsion that pressure sensor flows through expansion tube to monitor is provided with exhaust expansion pipe.
It is shown in Figure 2 according to exhaust expansion pipe 4 of the present utility model.As shown in Fig. 2 the exhaust expansion pipe 4 is
It is the cylindrical pipe of L with a diameter of D and length, the two ends of wherein cylindrical pipe are connected respectively to the upstream portion of exhaust expansion pipe
Part and components downstream.Compared with the pipeline being attached thereto due to the spatial volume of exhaust expansion pipe 4 and want big many so that continuous
The exhaust flowed in pipeline expands such that after exhaust expansion pipe is entered and the waveform of exhaust pressure wave is adjusted.Pass through
The diameter D and length L of adjustment exhaust expansion pipe 4, thus it is possible to vary the amplitude and phase of the pressure wave of the exhaust from single-cylinder engine
Position, so that the waveform of the exhaust pressure wave of scavenging period and whole machine are approximately the same.Certainly it will be appreciated by those skilled in the art that
The exhaust expansion pipe 4 can also reduce exhaust noise.
In the present embodiment, there is provided exhaust expansion pipe 4 of the multiple with different-diameter D and length L.Run according to engine
The size of operating mode or engine exhaust amount, can select to match the exhaust expansion pipe of different-diameter and length.According to this implementation
Example, can select the exhaust expansion pipe of suitable caliber and length by way of Computer Simulation.
Show using computer simulation software to select to determine the exhaust expansion of suitable caliber and length in accompanying drawing 3-4
Pipe.Specifically, for the engine bore (such as but not limited to 270mm) for giving and given engine stroke (for example
But it is not limited to 300mm), the exhaust expansion pipe of different-diameter is input in computer simulation software as variable element to be carried out
Numerical simulation calculation.The software for calculation can be for example, one-dimensional work of the engine known in the art such as BOOST, GT-Power
Process simulation simulation software.In the case of given cylinder diameter and engine stroke, the mould of expansion tube pressure at expulsion is exhausted
It is ordinary skill in the art means to intend calculating, be will not be repeated here.
As shown in figure 3, exhaust expansion pipe of the selection with 4 kinds of different-diameters carries out numerical simulation calculation：D1 is (for example but not
Be limited to 200mm), D2 (such as but not limited to 300mm), D3 (such as but not limited to 400mm), D4 (such as but not limited to
It is 500mm), so as to the exhaust expansion pipe for obtaining different-diameter as shown in Figure 3 (corresponds in 720 complete crank angle degrees
Four-stroke engine) in pressure at expulsion curve (as shown in figure 3, different-diameter correspond to not synteny), wherein emphasis closes
Single-cylinder engine after the IO Intake Valve Opens moment (IVO) in note pressure at expulsion curve and before the exhaust valve closing moment (EVC)
The amplitude and phase of machine pressure at expulsion peak of curve.The pressure at expulsion curve that whole machine is vented is relatively more different as with reference to basis
The approximation ratio and uniformity of pressure at expulsion curve corresponding to diameter and the pressure at expulsion curve of whole machine.As shown in figure 3, wherein
Pressure at expulsion curve and whole machine pressure at expulsion curve with D2 diameters are approached the most, thus the engine exhaust amount for giving
With given operating mode, the exhaust expansion pipe of a diameter of D2 is suitably selected.
Similarly, for given engine exhaust amount and given operating mode, using the exhaust expansion pipe of different length as
Variable element carries out numerical simulation calculation in being input to computer simulation software.As shown in figure 4, selection has 4 kinds of different lengths
Exhaust expansion pipe carry out numerical simulation calculation：L1 (such as but not limited to 600mm), L2 (such as but not limited to 800mm),
L3 (such as but not limited to 1000mm), L4 (such as but not limited to 1200mm), so as to obtain different length as shown in Figure 4
Pressure at expulsion of the exhaust expansion pipe in complete 720 crank angle degrees (corresponding to four-stroke engine) curve (such as Fig. 4
Shown, different length corresponds to not synteny), wherein paying close attention to the IO Intake Valve Opens moment (IVO) in pressure at expulsion curve
Afterwards with the exhaust valve closing moment (EVC) before single-cylinder engine pressure at expulsion peak of curve amplitude and phase.By whole machine
The pressure at expulsion curve of exhaust compares the exhaust pressure of the pressure at expulsion curve and whole machine corresponding to different length as with reference to basis
The approximation ratio and uniformity of force curve.As shown in figure 4, pressure at expulsion curve and whole machine pressure at expulsion wherein with L3 length
Curve is approached the most, thus for the engine exhaust amount and given operating mode that give, suitably selects length swollen for the exhaust of L3
Tube expansion.Thus, all round computer simulation calculate as a result, it is possible to select the exhaust of optimum present engine capacity and operating mode
Expansion tube.
It is shown in Figure 5 to be provided with the exhaust expansion pipe 4 that determines according to the present embodiment and be not provided with exhaust expansion pipe
Pressure at expulsion contrast experiment figure.For the ease of comparing the effect of exhaust expansion pipe 4, the pressure at expulsion curve that whole machine is vented is made
It is the exhaust pressure for comparing the pressure at expulsion curve and whole machine when exhaust expansion pipe being set and exhaust expansion pipe is not provided with reference to basis
The approximation ratio and uniformity of force curve.As shown in Figure 5, when exhaust expansion pipe is not provided with, in pressure at expulsion curve
Single-cylinder engine pressure at expulsion curve after the IO Intake Valve Opens moment (IVO) and before the exhaust valve closing moment (EVC) can go out
Existing obvious spike, it will be apparent that be not inconsistent with whole machine pressure at expulsion, and after exhaust expansion pipe is set, the spike can be filtered so that
Pressure at expulsion more approaches the pressure at expulsion curve of whole machine.
The exhaust boundary Control device also has exhaust tube of pressure-stabilizing 5, and the exhaust tube of pressure-stabilizing 5 is connected to positioned at it by pipeline
The exhaust expansion pipe 4 of upstream, so as to receive the exhaust from exhaust expansion pipe 4 with the pressure of stabilization exhaust.Preferably, the exhaust
Tube of pressure-stabilizing 5 is the cylinder with sizable gas expansion volume, is expanded in the exhaust tube of pressure-stabilizing 5 by making exhaust, can
It is effectively reduced the pressure of exhaust and filters the pressure oscillation in pressure at expulsion to stablize pressure at expulsion.Whereby, in exhaust voltage stabilizing
In the presence of cylinder 5, the exhaust for flowing through it is obtained in that the exhaust steady state pressure of constant.
The exhaust boundary Control device also has pressure at expulsion coarse adjustment valve 6 and pressure at expulsion fine tuning valve 7, as shown in figure 1, row
Atmospheric pressure coarse adjustment valve 6 and pressure at expulsion fine tuning valve 7 are connected to the port of export of exhaust tube of pressure-stabilizing 5 to receive in the way of being arranged in parallel
The exhaust steady state pressure with constant from exhaust tube of pressure-stabilizing 5.By pressure at expulsion coarse adjustment valve 6 and pressure at expulsion fine tuning valve
7 are constructed to be permeable to adjust steady state pressure of the aperture to adjust the exhaust for flowing through.Preferably, pressure at expulsion coarse adjustment valve 6 and exhaust pressure
Power fine tuning valve 7 is the butterfly valve of Electronic control, and the processor for receiving external control signal is for example, provided with the upper end of valve
With the butterfly valve of electric operator.According to the present embodiment, opening for pressure at expulsion coarse adjustment valve 6 is controlled in the way of opened loop control respectively
Degree, and the aperture of pressure at expulsion fine tuning valve 7 is controlled in the way of closed-loop control.
Specifically, pressure at expulsion coarse adjustment valve 6 is the mode of opened loop control, directly by for example, external input control signal
Or the fixed control signal of user preset is input into or stores in the processor of electric control valve, so as to according to desired aperture
Value directly controls the aperture of pressure at expulsion coarse adjustment valve 6.At the same time, pressure at expulsion fine tuning valve 7 is for then using preferably PID controls
The close-loop control mode of system.Specifically control mode is：As shown in figure 1, the upstream end in exhaust expansion pipe 4 is provided with pressure at expulsion
Sensor 8, the pressure at expulsion in pipeline is gathered by the back pressure transducer 8, is the defeated of control signal by the pressure conversion
Enter value, and pressure at expulsion fine tuning valve 7 is fed back to realize aperture regulation using the input value as the conditioned signal of PID control, this
Art personnel are it is understood that the measured value of the pressure sensor 8 is also used as pressure shows and monitoring signal.Certainly,
The back pressure transducer 8 can also be arranged on the downstream of exhaust tube of pressure-stabilizing 5, the upstream of exhaust expansion pipe 4 according to actual needs
Pressure sensor 8 shown as pressure and monitoring signal.By changing pressure at expulsion coarse adjustment valve 6 and/or pressure at expulsion respectively
The valve opening of fine tuning valve 7, can be adjusted to target exhaust pressure so as to meet single cylinder engine difference operating condition pressure at expulsion
Under pressure at expulsion regulatory demand.
The exhaust boundary Control device also has exhaust main, and the exhaust main is connected to pressure at expulsion coarse adjustment valve 6 and row
The port of export of atmospheric pressure fine tuning valve 7 is discharged to the outside in environment with the exhaust for receiving exhaust and will receive.The exhaust main can
Being the pipeline connected with external environment condition of integrally casting shaping.Preferably, exhaust aftertreatment dress is provided with the exhaust main
Put 9 and muffler 10.By setting up exhaust gas post-treatment device 9 and muffler 10 on exhaust main, can simulate
The influence that exhaust gas post-treatment device 9 and muffler 10 are brought to exhaust back pressure under real engine operating condition so that
The test run of single-cylinder engine more approaches the actually used operating mode of engine.
Further, as shown in figure 1, the pipeline that exhaust expansion pipe 4 is connected to the exhaust outlet of single-cylinder engine 2 is exhaust resonance
Pipe 3, the exhaust resonatron 3 is constructed to be permeable to the waveform of the exhaust pressure wave for adjusting single-cylinder engine 2.Preferably, it is humorous in exhaust
The upstream of vibration tube 3 is provided with the temperature sensor for monitoring delivery temperature.Specifically, can be according to the tool of single-cylinder engine
The exhaust demand of running body parameter and carrying out practically operating mode flexibly to change the structure type of exhaust resonatron 3, for example but does not limit
In parameters such as length of pipe, quantity, the inside nominal diameters that can change exhaust resonatron 3, so as to adjust pressure at expulsion and/or filter
Pressure wave spike in exhaust, and then the amplitude and phase of the pressure at expulsion peak of curve of single-cylinder engine are adjusted, so that single
The waveform of pressure at expulsion and/or pressure wave in the exhaust process of Cylinder engine is approximate with the whole machine of multi-cylinder to be consistent.
Below in conjunction with Fig. 1 to being controlled single cylinder to send out according to the exhaust boundary Control device of single-cylinder engine of the present utility model
The method of the exhaust boundary condition of motivation is described.
Start single-cylinder engine 2 first, air inlet is supplied to single-cylinder engine 2 via intake simulation pressure charging system 1.With list
The work by combustion of Cylinder engine 2 simultaneously discharges exhaust.Exhaust flows into exhaust resonatron 3 first, is vented in the exhaust resonatron 3
Resonance effect can occur, thus adjust pressure at expulsion and/or filter exhaust in pressure wave spike.Then, it is vented from exhaust
Resonatron 3 is flowed into exhaust expansion pipe 4 and is adjusted with the waveform to exhaust pressure wave.Simultaneously, additionally it is possible to reduce exhaust
Noise.After again, exhaust is flowed into exhaust tube of pressure-stabilizing 5 from exhaust expansion pipe 4, and pressure at expulsion back wave is absorbed by being vented tube of pressure-stabilizing
Shape, so as to filter the pressure wave spike in exhaust pressure wave, to obtain the exhaust steady state pressure of constant.
After again, the export pipeline for being vented tube of pressure-stabilizing 5 for example can be divided into two-way by three-way pipe, be connected respectively to electronic row
Atmospheric pressure coarse adjustment valve 6 and electric exhausting pressure fine tuning valve 7.Electric exhausting pressure coarse adjustment valve 6 for example receives external control signal and enters
Row opened loop control, the aperture of direct regulating valve；Feedback signal of the electric exhausting pressure fine tuning valve 7 according to back pressure transducer 8
Closed loop PID control is carried out, with the aperture of basis and the difference automatic regulating valve of target exhaust pressure.
Then, exhaust after pressure at expulsion coarse adjustment valve 6 and electric exhausting pressure fine tuning valve 7 by importing in exhaust main through row
It is ultimately discharged into air after gas after-treatment device 9 and muffler 10.
The utility model is can become cylinder diameter, the single-cylinder engine of change stroke is application, disclosure satisfy that different cylinder diameters
The demand on the exhaust border of single-cylinder engine, the exhaust boundary Control device of the single-cylinder engine in the utility model is by setting
Pressure wave regulating member of the multiple with adjustable structure form (length of pipe, quantity, inside nominal diameter etc.), reaches guarantee single cylinder engine
Scavenging period is consistent with the whole machine of multi-cylinder；It is the operation of single cylinder engine and the whole machine of multi-cylinder under the different working conditions for studying different diesel engines
Performance is provided may.
The utility model is illustrated by above-described embodiment, but it is to be understood that, above-described embodiment is
For citing and descriptive purpose, and it is not intended to be limited to the utility model in described scope of embodiments.In addition ability
Field technique personnel it is understood that the utility model is not limited to above-described embodiment, according to teaching of the present utility model also
More kinds of variants and modifications can be made, these variants and modifications all fall within the utility model scope required for protection with
It is interior.
Claims (6)
1. a kind of exhaust boundary Control device of single-cylinder engine, the exhaust boundary Control device is used to simulate the exhaust side of whole machine
Boundary's condition, it is characterised in that the exhaust boundary Control device includes：
Exhaust expansion pipe, the exhaust expansion pipe is connected to the exhaust outlet of single-cylinder engine by pipeline, and the exhaust expansion pipe is tool
There is the cylindrical pipe of certain diameter and length, by the diameter and length that change the exhaust expansion pipe such that it is able to which change is flowed through
Exhaust pressure wave waveform；
Exhaust tube of pressure-stabilizing, the exhaust tube of pressure-stabilizing is connected to the exhaust expansion pipe by pipeline, so that steady into the exhaust
The exhaust expansion of pressure cylinder is with the pressure of stabilization exhaust；
Pressure at expulsion coarse adjustment valve and pressure at expulsion fine tuning valve, the pressure at expulsion coarse adjustment valve and pressure at expulsion fine tuning valve are set with parallel connection
The mode put is connected to the port of export of the exhaust tube of pressure-stabilizing, and the pressure at expulsion coarse adjustment valve and pressure at expulsion fine tuning valve are configured to
Valve opening can be adjusted to adjust the steady state pressure of the exhaust for flowing through；
Exhaust main, the exhaust main is connected to the port of export of the pressure at expulsion coarse adjustment valve and pressure at expulsion fine tuning valve to connect
The exhaust received exhaust and will receive is discharged to the outside in environment.
2. it is as claimed in claim 1 to be vented boundary Control device, it is characterised in that the exhaust boundary Control device includes many
The individual exhaust expansion pipe with different-diameter and length, is changed by changing the exhaust expansion pipe with different-diameter and length
The waveform of the pressure wave of the exhaust for flowing through.
3. it is as claimed in claim 1 to be vented boundary Control device, it is characterised in that the exhaust expansion pipe is connected to single cylinder hair
The pipeline of motivation is exhaust resonatron, and the exhaust resonatron is constructed to be permeable to the ripple of the exhaust pressure wave for adjusting single-cylinder engine
Shape.
4. it is as claimed in claim 1 to be vented boundary Control device, it is characterised in that the pressure at expulsion coarse adjustment valve and exhaust pressure
Power fine tuning valve is the butterfly valve of Electronic control, wherein the aperture of the pressure at expulsion coarse adjustment valve is controlled in the way of opened loop control,
The aperture of the pressure at expulsion fine tuning valve is controlled in the way of closed-loop control.
5. it is as claimed in claim 4 to be vented boundary Control device, it is characterised in that also including being arranged on the exhaust expansion pipe
The pressure sensor of upstream, wherein the pressure sensor gathers the pressure into the exhaust of the exhaust expansion pipe and presses this
Power is converted to control signal and feeds back to the pressure at expulsion fine tuning valve, so as to realize controlling the exhaust in the way of closed-loop control
The aperture of pressure fine tuning valve.
6. it is as claimed in claim 1 to be vented boundary Control device, it is characterised in that also including being arranged on the exhaust main
Exhaust gas post-treatment device and muffler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621366624.6U CN206256953U (en) | 2016-12-13 | 2016-12-13 | A kind of exhaust boundary Control device of single-cylinder engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621366624.6U CN206256953U (en) | 2016-12-13 | 2016-12-13 | A kind of exhaust boundary Control device of single-cylinder engine |
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| Publication Number | Publication Date |
|---|---|
| CN206256953U true CN206256953U (en) | 2017-06-16 |
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ID=59029051
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621366624.6U Active CN206256953U (en) | 2016-12-13 | 2016-12-13 | A kind of exhaust boundary Control device of single-cylinder engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106545396A (en) * | 2016-12-13 | 2017-03-29 | 中国船舶重工集团公司第七研究所 | A kind of aerofluxuss boundary control device of single-cylinder engine |
-
2016
- 2016-12-13 CN CN201621366624.6U patent/CN206256953U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106545396A (en) * | 2016-12-13 | 2017-03-29 | 中国船舶重工集团公司第七研究所 | A kind of aerofluxuss boundary control device of single-cylinder engine |
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