CN106351768A - Electrically-controlled gas injection system with gas-powered engine - Google Patents
Electrically-controlled gas injection system with gas-powered engine Download PDFInfo
- Publication number
- CN106351768A CN106351768A CN201610811162.2A CN201610811162A CN106351768A CN 106351768 A CN106351768 A CN 106351768A CN 201610811162 A CN201610811162 A CN 201610811162A CN 106351768 A CN106351768 A CN 106351768A
- Authority
- CN
- China
- Prior art keywords
- gas
- nozzle
- air motor
- pressure
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02M21/0248—Injectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/04—Pumps peculiar thereto
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M57/00—Fuel-injectors combined or associated with other devices
- F02M57/02—Injectors structurally combined with fuel-injection pumps
- F02M57/022—Injectors structurally combined with fuel-injection pumps characterised by the pump drive
- F02M57/027—Injectors structurally combined with fuel-injection pumps characterised by the pump drive electric
-
- 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
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Abstract
The invention discloses an electrically-controlled gas injection system with a gas-powered engine. The system comprises a high-pressure gas cylinder, an electromagnetic valve, a gas injector, the gas-powered engine and a stepping motor; the electromagnetic valve is installed between the high-pressure gas cylinder and the gas injector to control the flow of gas, feedback control is conducted on the electromagnetic valve according to changes of different running work condition loads of the gas-powered engine so as to precisely adjust the flow of the gas entering the gas injector, and the requirements on the flow and the pressure of the high-pressure gas under different work conditions of the gas-powered engine are met; an injection needle which can radially move is additionally arranged in a nozzle of the gas injector, a map chart of the gas-powered engine is input into a control module of the stepping motor according to the running work condition of the gas-powered engine, the stepping motor adjusts the position of the injection needle according to the work condition of the gas-powered engine, therefore, the pressure and the flow of the high-pressure gas entering a cylinder of the gas-powered engine can be adjusted, throttling loss of the high-pressure gas in the high-pressure gas cylinder is reduced, and the efficiency and the economical performance of the gas-powered engine are improved.
Description
Technical field
The invention belongs to electronic-controlled gas fuel injection field is and in particular to a kind of electric control gas injection system of air motor.
Background technology
Compared with internal combustion engine, air motor does not need fuel oil, noise low, safe and reliable, simple to operate, and structure letter
List, low cost of manufacture, production efficiency are high.The material of air motor can be manufactured with chemical materialss and other light metals, volume
Little, lightweight；The gas cylinder dress that gases at high pressure glass fibre used does, is produced by specialized factory, and dress ventilation bottle is convenient；Pneumatic
Motivation life-span length, abrasion is little, is not subject to thermal deformation and thermal stress, can be widely applied to automotive-type, aviation class, aerospace industry, generating
In product equal power device.Air motor is the electromotor of a kind of low energy consumption, no pollution, has the commercial promise of light.
Existing air motor research at present is directly laggard through simple transformation on traditional internal combustion engine mostly
OK, automatical and efficient decompressor, the control of engine behavior are set up between pressure-air gas bomb and air motor
System is realized by adjusting the pressure entering air motor compressed air.But, the high pressure air reducing that this method exists
Energy consumption is excessive, the low problem of compressed air energy utilization rate.Ejector is a kind of equipment of alternative decompressor, and it is by two kinds
The fluid of different pressures is mixed, and then reaches a kind of intermediate pressure fluid.Ejector mainly by main jet, suction tube,
The part such as mixing tube and anemostat forms.Its basic functional principle is: high-pressure fluid enters Laval nozzle and expanded, pressure
Decline, speed increases, be more than, in the speed of nozzle exit fluid, the critical velocity that the critical cross-section upper fluid of nozzle has.Work
Make fluid and enter reception pipe at a relatively high speed, then low-pressure fluid is siphoned away from reception pipe, carry out two fluids in mixing tube
Mixing, when fluid-mixing reaches sufficiently uniform velocity field, flow into diffuser pipe carry out supercharging slow down, final fluid-mixing with
Certain intermediate pressure flows out jet pipe.
Air motor is according to gas ejector as air supply system, the high pressure air flowing out in available gas cylinder
Carry out injection and be derived from environment or other low-pressure air, on the one hand can simplify or remove the pressure regulating equipment of dynamical system, thus smart
Simple system structure, is reduced the restriction loss when flowing through air relief valve equipment for the gases at high pressure, on the other hand can also be entered by injection
A certain amount of low-pressure air, the gross mass of required working fluid in increase system, and then improve the total amount of compressed gas, it is pneumatic
Electromotor inputs more energy, benefits raising power output.
Existing gas ejector is mostly the form of fixed structure, i.e. suction tube, mixing tube, the expansion length of pipe and interior
Footpath is fixed dimension, and its efficiency is affected larger, this gas by the dynamic head of gas injection and the nozzle exit area of gas injection
Ejector can not meet the requirement of air motor operating mode polytropy.
Content of the invention
It is contemplated that overcoming above-mentioned the deficiencies in the prior art it is proposed that a kind of electronic-controlled gas fuel injection system of air motor
System, to meet the requirement of the flow to gases at high pressure for the air motor difference operating mode and pressure.
The present invention employs the following technical solutions:
A kind of electric control gas injection system of air motor, including gas cylinder, electromagnetic valve, gas ejector, pneumatic
Electromotor and motor；
Described gas ejector includes nozzle needle, nozzle, receiving chamber, suction tube, mixing tube and expansion pipe,
Described gas cylinder is connected with electromagnetic valve, gas ejector successively by high-pressure air pipe, described gas ejector
Crown center position is provided with nozzle, and the bottom of described nozzle is placed in receiving chamber, and described receiving chamber is threaded connection suction tube
One end, and the bottom of nozzle overlapped with the porch of suction tube just, and the other end of described suction tube passes through screw thread and mixes
One end of pipe connects, and the other end of described mixing tube is passed through screw thread and is connected with one end of expansion pipe, the other end of described expansion pipe
It is fixed on air motor by bolt and Bolt plate, and expands pipe and deviate 30 ° of cylinder-bore axis in air motor cylinder；
Described nozzle afterbody center is drilled with screwed hole, is provided with the nozzle needle that can move radially, described nozzle needle at screwed hole
Top engage with gear bar one end, the gear bar other end is engaged with the gear being arranged on motor motor shaft, described step
Stepper motor driving gear is driven, and realizes nozzle needle and moves radially, and the gullet section changing nozzle amasss, thus changing gas ejector
Jet coefficient, gas pressure and gas flow.
In such scheme, described air motor is piston type pneumatic electromotor.
In such scheme, described nozzle is Rafael nozzle formula.
In such scheme, described mixing tube is columnar structures.
In such scheme, the material of described suction tube, mixing tube and expansion pipe is cast iron.
In such scheme, the needle tip of described nozzle needle is cone, is placed on the screwed hole of nozzle afterbody in order to nozzle needle
Interior.
In such scheme, described suction tube, expansion Guan Jun adopt gradual shrinkage jet pipe.
The invention has the benefit that
1st, increase nozzle needle in the nozzle of gas ejector, nozzle needle is controlled according to air motor operating mode by motor
Making it to move radially, thus adjusting aditus laryngis and the discharge area of nozzle, changing flow and the pressure of gas injection, dynamic adjustment
Enter into flow and the pressure of air motor gas in the jar；Meanwhile, on the pipeline that gas cylinder is connected with gas ejector
Using solenoid valve control, according to the change of air motor difference operating condition load, feedback control is carried out to electromagnetic valve, accurately
It is adjusted into the flow of ejector gas, meet the requirement of the flow to gases at high pressure for the air motor difference operating mode and pressure.
2nd, adopt gas ejector as air supply system, can simplify or remove the pressure regulating equipment of dynamical system, thus smart
Simple system structure, decreases restriction loss, increased the gross mass of working fluid in system, improves the total amount of compressed gas,
Input more energy for air motor, be beneficial to improve power output.
Brief description
Fig. 1 is the structural representation of the electric control gas injection system of air motor；
Fig. 2 is the structural representation of gas ejector；
Fig. 3 is gear-driven enlarged drawing.
In figure: 1- gas cylinder；2- electromagnetic valve；3- gas ejector；4- air motor；5- motor；6- gear；
7- nozzle needle；8- nozzle；9- receiving chamber；10- suction tube；11- mixing tube；12- expansion pipe；13- gear bar；14- gases at high pressure；
15- low-pressure gas.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As shown in figure 1, a kind of electric control gas injection system of air motor, including gas cylinder 1, electromagnetic valve 2, gas
Ejector 3, piston type pneumatic electromotor 4 and motor 5；In the present invention, air motor 4 starts for piston type pneumatic
Machine, model md556 of motor 5,, for two to motor, voltage is 50v for it, and electric current is 5.6a.
As shown in Fig. 2 gas ejector 3 includes nozzle needle 7, nozzle 8, receiving chamber 9, suction tube 10, mixing tube 11 and tapered
Expansion pipe 12, the material of suction tube 10, mixing tube 11 and expansion pipe 12 is cast iron, when the compression ratio of injection medium is more than 2.5
When, taper mixing chamber is most suitable；Because, in the operating mode of present invention design, the compression ratio of injection medium is more than 2.5, so spray
Mouth 8 adopts Rafael nozzle formula；Mixing tube 11 is columnar structures, and suction tube 10, expansion pipe 12 are all using gradual shrinkage jet pipe.
Gas cylinder 1 is connected with electromagnetic valve 2, gas ejector 3 successively by high-pressure air pipe, the top of gas ejector 3
Centre position is provided with nozzle 8, and the bottom of nozzle 8 is placed in receiving chamber 9, and receiving chamber 9 is threaded connection one end of suction tube 10,
And the bottom of nozzle 8 is overlapped with the porch of suction tube 10 just, the other end of suction tube 10 passes through screw thread and mixing tube 11
One end connects, and the other end of mixing tube 11 is passed through screw thread and is connected with one end of expansion pipe 12, and the other end of expansion pipe 12 passes through spiral shell
Bolt and Bolt plate are fixed on air motor 4, and expansion pipe 12 deviates 30 ° of cylinder-bore axis in air motor 4 cylinder.
Nozzle 8 afterbody center is drilled with screwed hole, is provided with the nozzle needle 7 that can move radially, the needle point of nozzle needle 7 at screwed hole
Portion is cone, is placed on the screw thread in the hole of nozzle 8 afterbody in order to nozzle needle 7；The a diameter of 1.5mm of nozzle needle 7, cylindrical section length
For 25mm, the length of tip portion is 4mm；As shown in figure 3, (nozzle needle 7 top is engaged on the top of nozzle needle 7 with gear bar 13 one end
Side be processed into the shape that can engage with gear bar 13), gear bar 13 other end be arranged on motor 5 motor shaft
Gear 6 engage, described motor 5 driving gear 6 is driven, and realizes nozzle needle 7 and moves radially, change nozzle 8 gullet section
Long-pending, thus changing the jet coefficient of gas ejector 3, gas pressure and gas flow.
Relevant parameter in Fig. 2 particularly as follows:
Ejection gas porch diameter d1 is 6mm, and nozzle 8 contraction section height s1 takes 12mm, the nozzle 8 expansion segment height s2 to be
8mm, nozzle 8 outlet diameter p1 are 5mm, and nozzle 8 upper end solid section height la is 5mm；Receiving chamber 9 height lb is 16mm, inhales
Entering pipe 10 inlet diameter d2 is 18mm, and suction tube 10 height lc is 16mm, and suction tube 10 outlet diameter d3 is 13mm, mixing tube 11
Height lm is 50mm, and expansion pipe 12 outlet diameter d4 is 23mm, and expansion pipe 12 height ld is 90mm.
The electronic-controlled gas fuel injection device system of air motor, using gas ejector 3 as gas cylinder 1 mesohigh gas
Decompressor, reduce restriction loss, improve air motor efficiency.Two portions of the electric-control system major control of the present invention
Position:
(1) control electromagnetic valve 2
According to the requirement of air motor 4 operating condition, when the start-up time of dynamic control electromagnetic valve 2 and unlatching continue
Between, so that the pressure of entrance air motor 4 cylinder mesohigh gas and flow is matched with air motor 4 operating condition.
(2) control the nozzle needle 7 in nozzle 8
Two structural parameters of ejector have considerable influence to the operating characteristic of gas ejector 3, and one is column type mixing tube
The ratio that 11 sectional area is amassed with nozzle 8 gullet section, one is the ratio that nozzle 8 discharge area is amassed with nozzle 8 gullet section；By
This is visible, and the gullet section of change nozzle 8 amasss can be very big to performance (as the flow, pressure etc.) generation of gas ejector 3
Impact.The nozzle needle 7 that can move radially is set in nozzle 8, and the needle tip of nozzle needle 7 is cone, and nozzle needle 7 moves radially and can change
Become the sectional area of the aditus laryngis of nozzle 8, thus changing the jet coefficient of gas ejector 3, gas pressure and gas flow.By spray
Pin 7 moves radially, and adjusts the aditus laryngis of nozzle 8 and the sectional area of outlet, improves the performance of gas ejector 3, to adapt to load change
The needs changed.The shift position of nozzle needle 7 is controlled using motor 5, and motor 5 is that electric impulse signal is changed into angular displacement
Or the open loop execution drive mechanism of straight-line displacement, in the case of non-overloading, the rotating speed of motor 5 and stop position only depend on
In frequency and the number of given pulse signal, the operation mechanism of motor 5 determines its angle of operation error model- following control signal
In short-term periodically, without bringing cumulative error.The present invention obtains air motor by the bench test of air motor 4
4 map schemes and is input to the control module of motor 5, is supplied to motor 5 signal by map figure, in nozzle 8
Nozzle needle 7 engage with gear bar 13 one end, gear bar 13 other end is meshed with gear 6, and gear 6 is then arranged on motor 5
Motor shaft on, motor 5 determines its rotating thus controlling the biography of gear according to the operating mode of electromotor that map figure provides
Dynamic, moving radially of nozzle needle 7 is controlled by the transmission of gear 6.
A kind of work process of the electric control gas injection system of air motor of the present invention particularly as follows:
Operating mode according to air motor 4 can first determine the last pressure flowing out pipeline fluid, flow etc., and because high
Pressure fluid 14 enters nozzle 8 and is expanded, pressure drop, and speed increases, and is more than nozzle 8 in the speed of nozzle 8 exit fluid
The critical velocity that has of critical cross-section upper fluid.Working fluid enters reception pipe at a relatively high speed, and introduces from reception pipe
Low-pressure fluid 15, carries out the mixing of two fluids in mixing tube 11, when fluid-mixing reaches sufficiently uniform velocity field, stream
Enter to expand pipe 12 and carry out supercharging deceleration, final fluid-mixing flows out jet pipe with certain intermediate pressure.The intermediate pressure finally determining
Power, in fact to be determined by high-pressure fluid 14 and low-pressure fluid 15, and low-pressure gas 15 can be by sensor to survey
Amount, now only need to adjust gas pressure, the flow in nozzle 8 exit, and gas pressure, the regulation of flow mainly pass through two parts,
One is flow, the air pressure primarily determining that its inlet air flow stream by the unlatching of electromagnetic valve；Two is just to control spray by motor 5
Moving radially of pin 7, installs a gear 6 on the motor shaft of motor 5, and gear 6 is engaged with gear bar 13 one end, gear
The bar other end is engaged with the top of nozzle needle 7, is rotated by motor 5 driving gear 6, the rotation driven gear bar 13 of gear 6
Transmission, driving the moving radially of nozzle needle 7, thus changing the sectional area that nozzle 8 waits mouth, accurately being adjusted by the change of sectional area
Save the change of its gas pressure and flow.
Above a kind of electric control gas injection system of air motor provided by the present invention is described in detail, this
Invention applies specific case and the principle of the present invention and embodiment is set forth, and to be described, the above is only
For presently preferred embodiments of the present invention, not in order to limit the present invention.All made within the spirit and principles in the present invention
Any modification, equivalent and improvement etc., should be included within the scope of the present invention.
Claims (7)
1. a kind of electric control gas injection system of air motor it is characterised in that include gas cylinder (1), electromagnetic valve (2),
Gas ejector (3), air motor (4) and motor (5)；
Described gas ejector (3) includes nozzle needle (7), nozzle (8), receiving chamber (9), suction tube (10), mixing tube (11) and expands
Open pipe (12),
Described gas cylinder (1) is connected with electromagnetic valve (2), gas ejector (3) successively by high-pressure air pipe, described gas injection
The crown center position of device (3) is provided with nozzle (8), and the bottom of described nozzle (8) is placed in receiving chamber (9), described receiving chamber (9)
It is threaded connection one end of suction tube (10), and the bottom of nozzle (8) is overlapped with the porch of suction tube (10) just, described
The other end of suction tube (10) is connected with one end of mixing tube (11) by screw thread, and the other end of described mixing tube (11) passes through spiral shell
Stricture of vagina is connected with one end of expansion pipe (12), and the other end of described expansion pipe (12) is fixed on pneumatic starting by bolt and Bolt plate
On machine (4), and expansion pipe (12) deviates 30 ° of cylinder-bore axis in air motor (4) cylinder；
Described nozzle (8) afterbody center is drilled with screwed hole, is provided with the nozzle needle (7) that can move radially, described spray at screwed hole
The top of pin (7) is engaged with gear bar (13) one end, gear bar (13) other end be arranged on motor (5) motor shaft
Gear (6) engages, described motor (5) driving gear (6) transmission, realizes nozzle needle (7) and moves radially, changes nozzle (8)
Gullet section amasss, thus changing the jet coefficient of gas ejector (3), gas pressure and gas flow.
2. a kind of electric control gas injection system of air motor according to claim 1 is it is characterised in that described pneumatic
Electromotor (4) is piston type pneumatic electromotor.
3. a kind of electric control gas injection system of air motor according to claim 1 is it is characterised in that described nozzle
(8) it is Rafael nozzle formula.
4. a kind of electric control gas injection system of air motor according to claim 1 is it is characterised in that described mixing
Pipe (11) is columnar structures.
5. a kind of electric control gas injection system of air motor according to claim 1 is it is characterised in that described suction
The material of pipe (10), mixing tube (11) and expansion pipe (12) is cast iron.
6. a kind of electric control gas injection system of air motor according to claim 1 is it is characterised in that described nozzle needle
(7) needle tip is cone, is placed on the screw thread in the hole of nozzle (8) afterbody in order to nozzle needle (7).
7. a kind of electric control gas injection system of air motor according to claim 1 is it is characterised in that described suction
Pipe (10), expansion pipe (12) are all using gradual shrinkage jet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610811162.2A CN106351768A (en) | 2016-09-08 | 2016-09-08 | Electrically-controlled gas injection system with gas-powered engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610811162.2A CN106351768A (en) | 2016-09-08 | 2016-09-08 | Electrically-controlled gas injection system with gas-powered engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106351768A true CN106351768A (en) | 2017-01-25 |
Family
ID=57859766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610811162.2A Pending CN106351768A (en) | 2016-09-08 | 2016-09-08 | Electrically-controlled gas injection system with gas-powered engine |
Country Status (1)
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110700952A (en) * | 2018-07-10 | 2020-01-17 | 罗伯特·博世有限公司 | Method for controlling the injection rate of a gaseous fuel and fuel injector |
| CN111287865A (en) * | 2020-02-18 | 2020-06-16 | 哈尔滨工程大学 | Gas injection device with inner cavity radiation spray pipe |
| CN111734501A (en) * | 2020-06-19 | 2020-10-02 | 吴勉之 | Airflow power generation system |
| CN114177820A (en) * | 2021-12-13 | 2022-03-15 | 华北水利水电大学 | Fragrance mixing machine |
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| CN110700952A (en) * | 2018-07-10 | 2020-01-17 | 罗伯特·博世有限公司 | Method for controlling the injection rate of a gaseous fuel and fuel injector |
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| CN114177820A (en) * | 2021-12-13 | 2022-03-15 | 华北水利水电大学 | Fragrance mixing machine |
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Application publication date: 20170125 |