CN105649679B - A kind of catalytic combustion type Micro HCCI free-piston generator - Google Patents
A kind of catalytic combustion type Micro HCCI free-piston generator Download PDFInfo
- Publication number
- CN105649679B CN105649679B CN201610010244.7A CN201610010244A CN105649679B CN 105649679 B CN105649679 B CN 105649679B CN 201610010244 A CN201610010244 A CN 201610010244A CN 105649679 B CN105649679 B CN 105649679B
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- Prior art keywords
- piston
- plunger
- free
- hcci
- chamber
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
- F01B23/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01B23/10—Adaptations for driving, or combinations with, electric generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J10/00—Engine or like cylinders; Features of hollow, e.g. cylindrical, bodies in general
- F16J10/02—Cylinders designed to receive moving pistons or plungers
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fuel-Injection Apparatus (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
The present invention provides a kind of catalytic combustion type Micro HCCI free-piston generators, including high-voltage energy storage device, cylinder, low-pressure reservoir, current inverter, conducting wire, first switch, load, second switch and accumulator；Cylinder includes combustion chamber, piston, chamber of calming the anger, plunger and plunger cavity；Combustion chamber is between opposed magnetic piston；It is equipped with exhaust outlet, scavenging port and fuel injector above combustion chamber, inlet manifold is equipped with below combustion chamber；The entrance of inlet manifold is equipped with leaf valve；The other end of each magnetic piston connects plunger；Cavity constitutes chamber of calming the anger between magnetic piston and plunger；High-voltage energy storage device connects plunger cavity upper end by high-pressure solenoid valve；Low-pressure reservoir connects plunger cavity lower end by low-voltage solenoid valve；Solenoid is equipped with outside cylinder；Solenoid is connected by conducting wire with current inverter, second switch and accumulator, and second switch and accumulator are in parallel with first switch and load again.The structure of minitype generator simplifies, and can obtain the energy density of bigger.
Description
Technical field
It is miniature more particularly, to a kind of catalytic combustion type the invention belongs to internal combustion engine and generator micropower system field
HCCI free-piston generators.
Background technology
Using hydrocarbon as the micropower system of fuel it is high, small with its energy density the advantages that, receive the country
Outer scholar widely concern and research.But along with going deep into for scientific research progress, develop novel micro power systems
In the process, scientific research person is encountered by miscellaneous difficult and challenge.Combustion chamber volume strongly reduces, in micro combustor
The burning situation in portion and burning condition etc. are all changed.Bring many serious one for restricting micro-power plant and developing
Serial problem.For example, the combustion chamber volume reduced leads to the heat transfer loss that larger surface to volume ratio is brought；Micro combustor pre-mixed gas
Residence time is inadequate, and that brings is difficult to realize continuously chemically react；Flame quenching；Combustion instability in mini combustor
Deng.These problems seriously constrain the development of oligodynamic device.
Homogeneous charge combustion ignition mode is a kind of new combustion mode, it is mixed using homogeneous charging air with fuel,
Burning indoor multipoint is caught fire, and experiment proves compared with traditional combustion system, and homogeneous charge combustion ignition mode has higher
Efficiency of combustion, the advantages that low NOx and PM are discharged, well solved the problem present in micro-power plant.But at present
The patent and technology that generator and Micro HCCI free-piston engine are combined are less.Many free-piston generators are marked at it
It is confined to two-stroke operation principle in quasi- configuration, each reciprocation cycle needs power stroke to maintain engine operation, such as beautiful
State patent US2900592, United States Patent (USP) US4924956, and patent CN201110427677.X, United States Patent (USP) US6541875 etc.
The control of free-piston kinetic stability is then had ignored, the very high kinetic energy of piston is such as since Fast Load reduction may cause
Mechanical Contact between the piston and cylinder cover, damages, otherwise load increase may then cause to stop working.
Invention content
In response to the deficiencies in the existing technology, the present invention provides a kind of power generations of catalytic combustion type Micro HCCI free-piston
Machine is made the structure of microgenerator simplify, is avoided using the structure type of two groups of free piston internal combustion engines and parallel operation of generator
Friction loss caused by machine driving and consume, and then obtain the energy density of bigger.
The present invention achieves the above technical objects by the following technical means.
A kind of catalytic combustion type Micro HCCI free-piston generator, including high-voltage energy storage device, high-pressure solenoid valve, cylinder,
Low-pressure reservoir, low-voltage solenoid valve, current inverter, conducting wire, first switch, load, second switch and accumulator；The cylinder packet
Include combustion chamber, a pair of opposed piston, a pair are calmed the anger chamber, a pair of of plunger and a pair of of plunger cavity；The combustion chamber is located at opposed
Between magnetic piston；It is equipped with exhaust outlet, scavenging port and fuel injector above combustion chamber, inlet manifold is equipped with below combustion chamber；Air inlet
The entrance of manifold is equipped with leaf valve；The other end of each magnetic piston connects plunger；Cavity structure between magnetic piston and plunger
At chamber of calming the anger；High-voltage energy storage device connects plunger cavity upper end by high-pressure solenoid valve；Low-pressure reservoir passes through low-voltage solenoid valve connecting pole
Fill in chamber lower end；Solenoid is equipped with outside cylinder；The solenoid passes through conducting wire and current inverter, second switch and accumulator string
Connection, second switch and accumulator are in parallel with first switch and load again.
Further, return fuel tank is additionally provided between the plunger and chamber of calming the anger.
Further, the exhaust outlet is equipped with pressure charging valve, and the scavenging port is equipped with pressure reducing valve.
Further, overflow valve is equipped between the high-voltage energy storage device and low-pressure reservoir.
Further, the bottom of the combustion chamber and piston end surface are arranged with catalyst layer.
Further, the heat proof material that the magnetic piston is fabulous by magnetic property and resistivity is high.
Further, the material of the magnetic piston is that shirt bores or aluminium nickel bores.
Further, the high-pressure solenoid valve is equipped with electronic control unit EPR-P1.
Beneficial effects of the present invention：
(1) a kind of catalytic combustion type Micro HCCI free-piston generator of the present invention, by internal combustion engine and generator
It is combined, mechanical energy is converted into electric energy, avoid friction loss and consume caused by machine driving, improve energy
Transformation efficiency；The structure type of two groups of free piston internal combustion engines and parallel operation of generator not only simplifies the structure of microgenerator,
And the energy density of bigger can be obtained.
(2) present invention uses opposed type free-piston generator, in the course of work there is Motor Mass Centre to fix, without reciprocal
The advantages that inertia force, high scavenging efficiency.
(3) present invention between plunger and chamber of calming the anger by being additionally provided with return fuel tank, even if ensureing engine breakdown
Afterwards, it remains able to that piston is pushed to return to lower dead center.
(4) present invention increases pressure charging valve in air inlet, and scavenging port increases pressure reducing valve, and increases solenoid valve and spring
Plate valve door optimizes piston motion process and exhaust gas discharge process, improves energy conversion efficiency and compression and combustion acting
Ability.
(5) present invention compresses end face in micro- free-piston and bottom of combustion chamber adds catalyst layer, increases catalyst and covers
Capping accumulates, and reduces the activation energy to have burnt needed for reaction, improves ignition reliability, accelerates burn rate, accelerates production
It can rate.
(6) micro- free-piston and homogeneous-charge compression-ignition process are combined together by the present invention, have higher efficiency of combustion,
The advantages that low NOx and PM is discharged, and solve the problems such as extinguishing of micro-scale gas flow Flame and thermal loss.
Description of the drawings
Fig. 1 is the structural schematic diagram of the present invention.
Fig. 2 is the circuit diagram in the present invention.
The reference numerals are as follows：
1- calms the anger chamber；2- exhaust outlets；3- fuel injectors；4- scavenging ports；5- high-pressure solenoid valves；6- overflow valves；7- plunger cavities；9-
Solenoid；10- high-voltage energy storage devices；11- return fuel tanks；12- laser displacement sensors；13- leaf valves；14- inlet manifold；15-
Magnetic piston；16- plungers；17- low-pressure reservoirs；The combustion chambers 19-；20- low-voltage solenoid valves；21- pressure charging valves；22- pressure reducing valves；23-
Current inverter；24- conducting wires；25- first switches；26- is loaded；27- second switches；28- accumulators.
Specific implementation mode
Below in conjunction with the accompanying drawings and specific embodiment the present invention is further illustrated, but protection scope of the present invention is simultaneously
It is without being limited thereto.
As shown in Figure 1, a kind of catalytic combustion type Micro HCCI free-piston generator, including high-voltage energy storage device 10, high pressure
Solenoid valve 5, cylinder, low-pressure reservoir 17, low-voltage solenoid valve 20, current inverter 23, conducting wire 24, first switch 25, load 26, the
Two switches 27 and accumulator 28；The cylinder includes that combustion chamber 19, a pair of opposed magnetic piston 15, a pair are calmed the anger chamber 1, a pair of
Plunger 16 and a pair of of plunger cavity 7；The combustion chamber 19 is between opposed magnetic piston 15；19 top of combustion chamber is equipped with exhaust
Mouth 2, scavenging port 4 and fuel injector 3,19 lower section of combustion chamber are equipped with inlet manifold 14；The entrance of inlet manifold 14 is equipped with leaf valve
13；The exhaust outlet 2 is equipped with pressure charging valve 21, and the scavenging port 4 is equipped with pressure reducing valve 22, optimizes piston motion process and exhaust gas row
Journey is let off, energy conversion efficiency and compression and combustion acting ability are improved.
The other end of each magnetic piston 15 connects plunger 16；The bottom and 15 end face of magnetic piston of the combustion chamber 19 are equal
It is disposed with catalyst layer, the activation energy to have burnt needed for reaction is reduced, improves ignition reliability, accelerates burning speed
Rate accelerates production capacity rate.Cavity constitutes chamber 1 of calming the anger between magnetic piston 15 and plunger 16, between the plunger 16 and chamber 1 of calming the anger
It is additionally provided with return fuel tank 11, effect is to push magnetic piston 15 to return to lower dead center after engine breakdown.Return fuel tank
11 are used in conjunction with the same cylinder body with plunger cavity 7, and the course of work, which connects each other, to influence each other, and low pressure is housed in return fuel tank 11
Oil, when working cycles are in compression stroke, 7 volume of plunger cavity increases, and 11 volume of return fuel tank reduces, and oil pressure increases in mailbox
Greatly, magnetic piston 15 will be pushed to return to lower dead center when engine is in failure.High-voltage energy storage device 10 is connected by high-pressure solenoid valve 5
Connect 7 upper end of plunger cavity；The high-pressure solenoid valve 5 is equipped with electronic control unit EPR-P1, is opened for controlling high-pressure solenoid valve 5；
Low-pressure reservoir 17 connects 7 lower end of plunger cavity by low-voltage solenoid valve 20；The laser displacement sensor 12 is former using echo analysis
Reason carrys out measurement distance, and principle is identical as radio radar, after laser alignment objective emission is gone out, measures its two-way time,
Round-trip distance is obtained multiplied by with the light velocity.Sensor internal is by processor unit, Echo Processing unit, laser emitter, swashs
The part such as optical receiver forms.Overflow valve 6 is equipped between the high-voltage energy storage device 10 and low-pressure reservoir 17；Spiral shell is equipped with outside cylinder
Coil 9；The solenoid 9 is connected by conducting wire 24 with current inverter 23, second switch 27 and accumulator 28, second switch 27
It is in parallel with first switch 25 and load 26 again with accumulator 28.
The course of work：
When magnetic piston 15 is in lower dead center, electronic control unit EPR-P1 control high-pressure solenoid valves are opened, high pressure oil from
High pressure accumulator 10 enters plunger cavity 7 and pushes magnetic piston 15 by lower dead center uplink, i.e., magnetic piston 15 from two side positions in
Between combustion chamber 19 move, compression stroke starts；When magnetic piston 15 has the kinetic energy for reaching top dead centre, electronic control unit
EPR-P1 controls high-pressure solenoid valve 5 and closes, and low-voltage solenoid valve 20 is automatically opened due to being vacuumized in plunger cavity 7, later low pressure
Solenoid valve 20 maintains aperture, magnetic piston 15 to continue to be up to top dead centre by inertia with copped wave, and compression stroke terminates；Work as magnetism
Before piston 15 reaches top dead centre, 3 oil spout of fuel injector of combustion chamber 19, fuel combustion heat release, 15 downlink of magnetic piston, expansion stroke
Start；Low-voltage solenoid valve 20 is kept it turning on, until there is magnetic piston 15 kinetic energy for reaching lower dead center, low-voltage solenoid valve 20 to close
It closes；Magnetic piston 15 pushes plunger 16 that high pressure oil is pushed back high pressure accumulator 10, while 15 downlink of magnetic piston, leaf valve
13 close, and air is compressed by magnetic piston 15 is stored in the calming the anger in chamber 1 of inlet manifold 14 and piston base；When magnetic piston 15
Displacement be less than 2 position of exhaust outlet when, exhaust outlet 2 is opened immediately, exhaust gas discharge, when magnetic piston 15 continue traveling downwardly displacement be less than sweep
When 4 position of gas port, scavenging port 4 is opened in succession, and compressed air enters through scavenging port 4 in cylinder, and exhaust gas is pushed further to be discharged,
Engine completes a working cycles, and laser sensor 12 records entire working cycle process.The effect of return oil pocket 11 is
After engine breakdown, magnetic piston 15 is pushed to return to lower dead center, hydraulic free-piston is suitble to be operated under low and medium frequency.
The embodiment is the preferred embodiments of the present invention, but present invention is not limited to the embodiments described above, not
Away from the present invention substantive content in the case of, those skilled in the art can make it is any it is conspicuously improved, replace
Or modification all belongs to the scope of protection of the present invention.
Claims (7)
1. a kind of catalytic combustion type Micro HCCI free-piston generator, which is characterized in that including high-voltage energy storage device (10), high pressure
Solenoid valve (5), cylinder, low-pressure reservoir (17), low-voltage solenoid valve (20), current inverter (23), conducting wire (24), first switch
(25), (26), second switch (27) and accumulator (28) are loaded；The cylinder includes combustion chamber (19), a pair of opposed magnetism
Piston (15), a pair are calmed the anger chamber (1), a pair of of plunger (16) and a pair of plunger cavity (7)；The combustion chamber (19) is located at opposed magnetic
Between property piston (15)；Exhaust outlet (2), scavenging port (4) and fuel injector (3) are equipped with above combustion chamber (19), under combustion chamber (19)
Side is equipped with inlet manifold (14)；The entrance of inlet manifold (14) is equipped with leaf valve (13)；Each magnetic piston (15) is another
End connection plunger (16)；Cavity constitutes chamber (1) of calming the anger, the bottom of the combustion chamber (19) between magnetic piston (15) and plunger (16)
Portion and magnetic piston (15) end face are arranged with catalyst layer；High-voltage energy storage device (10) connects plunger by high-pressure solenoid valve (5)
Chamber (7) upper end；Low-pressure reservoir (17) connects plunger cavity (7) lower end by low-voltage solenoid valve (20)；Solenoid is equipped with outside cylinder
(9)；The solenoid (9) is connected by conducting wire (24) with current inverter (23), second switch (27) and accumulator (28), the
Two switches (27) and accumulator (28) are in parallel with first switch (25) and load (26) again.
2. a kind of catalytic combustion type Micro HCCI free-piston generator according to claim 1, which is characterized in that described
Return fuel tank (11) is additionally provided between plunger (16) and chamber of calming the anger (1).
3. a kind of catalytic combustion type Micro HCCI free-piston generator according to claim 1, which is characterized in that described
Exhaust outlet (2) is equipped with pressure charging valve (21), and the scavenging port (4) is equipped with pressure reducing valve (22).
4. a kind of catalytic combustion type Micro HCCI free-piston generator according to claim 1, which is characterized in that described
Overflow valve (6) is equipped between high-voltage energy storage device (10) and low-pressure reservoir (17).
5. a kind of catalytic combustion type Micro HCCI free-piston generator according to claim 1, which is characterized in that described
The heat proof material that magnetic piston (15) is fabulous by magnetic property and resistivity is high is made.
6. a kind of catalytic combustion type Micro HCCI free-piston generator according to claim 5, which is characterized in that described
The material of magnetic piston (15) is that shirt bores or aluminium nickel bores.
7. a kind of catalytic combustion type Micro HCCI free-piston generator according to claim 1, which is characterized in that described
High-pressure solenoid valve (5) is equipped with electronic control unit EPR-P1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610010244.7A CN105649679B (en) | 2016-01-05 | 2016-01-05 | A kind of catalytic combustion type Micro HCCI free-piston generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610010244.7A CN105649679B (en) | 2016-01-05 | 2016-01-05 | A kind of catalytic combustion type Micro HCCI free-piston generator |
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| Publication Number | Publication Date |
|---|---|
| CN105649679A CN105649679A (en) | 2016-06-08 |
| CN105649679B true CN105649679B (en) | 2018-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610010244.7A Expired - Fee Related CN105649679B (en) | 2016-01-05 | 2016-01-05 | A kind of catalytic combustion type Micro HCCI free-piston generator |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110778392B (en) * | 2019-07-23 | 2021-08-27 | 上海交通大学 | Free piston type internal combustion engine generator |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4965864A (en) * | 1987-12-07 | 1990-10-23 | Roth Paul E | Linear motor |
| CN1149905A (en) * | 1994-06-09 | 1997-05-14 | 皮尔·安德烈·里加兹 | Linear electrical generator |
| US6390785B1 (en) * | 2000-10-05 | 2002-05-21 | The Board Of Governors Of Wayne State University | High efficiency booster for automotive and other applications |
| US6705085B1 (en) * | 1999-11-29 | 2004-03-16 | Shell Oil Company | Downhole electric power generator |
| CN2707990Y (en) * | 2004-07-06 | 2005-07-06 | 江苏大学 | Mixed power plant in homogeneous compression ignition combustion mode |
| CN200989243Y (en) * | 2006-11-03 | 2007-12-12 | 江苏大学 | Single-free piston double-cylinder type internal combustion engine power generating system |
| CN103711581A (en) * | 2014-01-07 | 2014-04-09 | 江苏大学 | Catalyzing combination micro free piston generator with preheating device |
-
2016
- 2016-01-05 CN CN201610010244.7A patent/CN105649679B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4965864A (en) * | 1987-12-07 | 1990-10-23 | Roth Paul E | Linear motor |
| CN1149905A (en) * | 1994-06-09 | 1997-05-14 | 皮尔·安德烈·里加兹 | Linear electrical generator |
| US6705085B1 (en) * | 1999-11-29 | 2004-03-16 | Shell Oil Company | Downhole electric power generator |
| US6390785B1 (en) * | 2000-10-05 | 2002-05-21 | The Board Of Governors Of Wayne State University | High efficiency booster for automotive and other applications |
| CN2707990Y (en) * | 2004-07-06 | 2005-07-06 | 江苏大学 | Mixed power plant in homogeneous compression ignition combustion mode |
| CN200989243Y (en) * | 2006-11-03 | 2007-12-12 | 江苏大学 | Single-free piston double-cylinder type internal combustion engine power generating system |
| CN103711581A (en) * | 2014-01-07 | 2014-04-09 | 江苏大学 | Catalyzing combination micro free piston generator with preheating device |
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| Publication number | Publication date |
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| CN105649679A (en) | 2016-06-08 |
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Granted publication date: 20180821 Termination date: 20190105 |