CN101979852A - Free piston engine with independent compression and controllable inlet air thermodynamic parameter - Google Patents
Free piston engine with independent compression and controllable inlet air thermodynamic parameter Download PDFInfo
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- CN101979852A CN101979852A CN 201010556925 CN201010556925A CN101979852A CN 101979852 A CN101979852 A CN 101979852A CN 201010556925 CN201010556925 CN 201010556925 CN 201010556925 A CN201010556925 A CN 201010556925A CN 101979852 A CN101979852 A CN 101979852A
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Abstract
The invention discloses a free piston engine with independent compression and controllable inlet air thermodynamic parameter. A piston in reciprocating linear motion in a cylinder is connected with a linear motor mover to form a moving component of a system, an elastic element is supported on the lower part of the moving component, an electromagnetic driven air distribution mechanism is arranged at the top of the cylinder, and the opening/closing action of the electromagnetic driven air distribution mechanism is controlled by a system controller to finish air suction and exhaust; a driving module and an energy storage element finish conversion and storage of electrical energy and are controlled by the system controller; and an air inlet and compression module is connected with the cylinder through a pipe, and the electromagnetic driven air distribution mechanism controls and adjusts the quality of a working medium entering the cylinder. Because the air inlet and compression strokes of the engine are canceled, namely the original four strokes of the engine are changed into quasi two strokes to finish one working cycle, the power density of the free piston engine is improved, and the working cycle number can be nearly doubled; and meanwhile, the energy-saving performance and environment-friendly performance of the engine are improved by controlling the inlet air thermodynamic parameter.
Description
Technical field
The present invention relates to a kind of motor (internal-combustion engine), particularly relate to a kind of independent compression, the controlled free-piston engine of air inlet thermodynamic parameter.
Background technique
Relevant patents such as linear motor or free-piston engine are abroad promptly arranged in the eighties, for example " Linear engine/hydraulic pump (United States Patent:4308720) (nineteen eighty-two) ", this class patent is generally all used two stroke IC engine or stirling engine principles, output can be the form of hydraulic pressure energy or electric energy, and wherein mostly being hydraulic pressure greatly can form.The opposed types that adopt can not divide the cylinder independent operating more on the structure.As patent " Free piston engine (United States Patent:6199519) (calendar year 2001) ", " Opposed piston opposed cylinder free piston engine (United States Patent:6953010) (2005) " etc.Applicant's's authorized (in January, 2010) patent of invention " internal combustion-linear generating integrated power system " (patent No.: ZL2007 10019410. 0) has unique distinctions such as each dead-centre position of adjustable stroke and the controllable piston characteristics of motion, it is still in essence uses the four-stroke working principle, be the sequential loop work of system according to aspirating stroke, compression stroke, expansion stroke, exhaust stroke, the present invention is further improvement on this basis.
Free piston engine has had long research history, studies more two-stroke free-piston engine specific power big (same engine displacement and weight can provide bigger power) at present, but energy-conserving and environment-protective performance relative mistake; And four-stroke free-piston engine energy-conserving and environment-protective performance has a clear superiority in, but specific power has much room for improvement (the work cycle number of times is the former 50% under same frequency of okperation).
The accurate control of air inlet thermodynamic parameter helps improving the performance of motor.For example, temperature is too high, and the detonation tendency increases, and favourable oxynitrides generates, and the heat transfer loss increases; Temperature is low excessively, the stable operation that is hard to keep (unfavorable fuel evaporation mixing).For the combustion manner that is become internal-combustion engine of future generation at present---homogeneous compression-ignition (HCCI) then more needs the accurate control to the air inlet thermodynamic parameter.But prior art is relevant report not as yet.
Summary of the invention
The object of the present invention is to provide a kind of independent compression, the controlled free-piston engine of air inlet thermodynamic parameter.Improve engine mixed gas and form and combustion process, the raising engine performance by realizing thermodynamic parameters such as independent regulation suction pressure and temperature.
The technical solution that realizes the object of the invention is: a kind of independent compression, the controlled free-piston engine of air inlet thermodynamic parameter comprise the air inlet that is made of air compressor, pressure regulator, pressure stabilizer, temperature-adjusting device and compression module and Electromagnetic Drive distribution device, piston, linear motor rotor, linear motor stator electric, elastic element, SC system controller, driver module, energy-accumulating element; In cylinder, do the piston of linear reciprocating motion and the moving element that linear motor rotor is connected to form system, elastic element is bearing in the moving element bottom, the Electromagnetic Drive distribution device is installed in cylinder head, controls its On/Off action by SC system controller and finishes air inlet and exhaust; Driver module, energy-accumulating element are finished the conversion and the storage of electric energy, and are controlled by SC system controller; Air inlet and compression module that air compressor, pressure regulator, pressure stabilizer, temperature-adjusting device constitute link to each other with cylinder by pipeline, and Electromagnetic Drive distribution device regulating and controlling enters the working medium quality of cylinder.
The present invention compared with prior art, its remarkable advantage is: 1) owing to cancelled the air inlet and compression stroke (it is limited within the relative very short stroke) of motor self substantially, make motor finish a work cycle by original four-stroke, change the two-stroke that is as the criterion and finish a work cycle, help improving the specific power of free motion stops motor, the work cycle number can improve near about 1 times; 2) Duan air inlet and compression stroke have also reduced the decay of the working medium kinetic energy of intake process generation; 3) by the control intake temperature, improve the engine energy-saving environmental-protecting performance.Suitably cooling helps reducing the maximum combustion temperature under the motor nominal situation, thereby reduces oxynitrides growing amount and petrol engine detonation tendency, and reduces the heat transfer loss.Fuel evaporation when suitably heating helps the engine cold state startup mixes, thereby the generation of control hydrocarbon and carbon monoxide guarantees that motor starts smoothly.
Description of drawings
Accompanying drawing is the controlled free-piston engine structural representation of independent compression of the present invention, air inlet thermodynamic parameter.
The implication of label representative is in the accompanying drawing: 1-Electromagnetic Drive valve, the 2-piston, 3-linear motor rotor, 4-linear motor stator electric, the 5-elastic element, the 6-air compressor, 7-pressure regulator, 8-pressure stabilizer, the 9-temperature-adjusting device, the 10-SC system controller, 11-driver module, 12-energy-accumulating element.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
In conjunction with the accompanying drawings, a kind of independent compression, the controlled free-piston engine of air inlet thermodynamic parameter comprise the air inlet that is made of air compressor 6, pressure regulator 7, pressure stabilizer 8, temperature-adjusting device 9 and compression module and Electromagnetic Drive distribution device 1, piston 2, linear motor rotor 3, linear motor stator electric 4, elastic element 5, SC system controller 10, driver module 11, energy-accumulating element 12;
In cylinder, do the piston 2 of linear reciprocating motion and the moving element that linear motor rotor 3 is connected to form system, elastic element 5 is bearing in the moving element bottom, Electromagnetic Drive distribution device 1 is installed in cylinder head, finishes air inlet and exhaust by its On/Off action of SC system controller 10 controls; Driver module 11, energy-accumulating element 12 are finished the conversion and the storage of electric energy, and by SC system controller 10 controls; Air inlet and compression module that air compressor 6, pressure regulator 7, pressure stabilizer 8, temperature-adjusting device 9 constitute link to each other with cylinder by pipeline, and Electromagnetic Drive distribution device 1 regulating and controlling enters the working medium quality of cylinder.
Piston motion is near top dead center the time, and intake valve is opened, and pressurized air enters cylinder, by the Electromagnetic Drive valve control intake valve characteristics of motion, by the linear electric motor control piston characteristics of motion, thereby guarantee air inflow, through the process that takes fire immediately after extremely short air inlet, the compression process.
Piston motion is near top dead center the time, and intake valve is opened, and pressurized air enters cylinder, and optionally the control piston characteristics of motion and the intake valve characteristics of motion (by the Electromagnetic Drive valve) guarantee suitable air inflow (relevant with engine output).The process that promptly takes fire subsequently, expansion, exhaust process and four-stroke free-piston engine are similar.
The chemical energy of fuel does work by burning expansion, directly connects linear motor rotor 3 by piston 2, and the output electric energy also can be imported the motion of electric energy driven plunger when needed to load or energy-accumulating element 12, and by regulating the characteristics of motion of electromagnetic force control piston.SC system controller 10 is by driver module 11 control linear electric motor sense of current and sizes, also controls engine subsystems such as parameter such as suction pressure, temperature and intake and exhaust, oil spout, igniting simultaneously.
It is the free-piston engine of fuel that application of the present invention is not limited to diesel oil or gasoline, and the possibility of using multiple different fuel (comprising compressed natural gas, hydrogen etc.) and different combustion manner (for example homogeneous charge compression ignite mode) is also arranged.The fuel that is motor is liquid fuels such as gasoline, diesel oil, or is gaseous fuels such as compressed natural gas, hydrogen.
The frictional loss of four-stroke free-piston engine is little keeping, on the basis of advantages such as piston motion rule optimization control degrees of freedom is big, propose the two stroke mode of operation of a kind of standard and take into account energy-conserving and environment-protective performance and the specific power that improves free-piston engine simultaneously.
Claims (4)
1. an independent compression, the controlled free-piston engine of air inlet thermodynamic parameter, it is characterized in that, comprise the air inlet that constitutes by air compressor [6], pressure regulator [7], pressure stabilizer [8], temperature-adjusting device [9] and compression module and Electromagnetic Drive distribution device [1], piston [2], linear motor rotor [3], linear motor stator electric [4], elastic element [5], SC system controller [10], driver module [11], energy-accumulating element [12];
In cylinder, do the piston [2] of linear reciprocating motion and the moving element that linear motor rotor [3] is connected to form system, elastic element [5] is bearing in the moving element bottom, Electromagnetic Drive distribution device [1] is installed in cylinder head, controls its On/Off action by SC system controller [10] and finishes air inlet and exhaust; Driver module [11], energy-accumulating element [12] are finished the conversion and the storage of electric energy, and are controlled by SC system controller [10]; Air inlet and compression module that air compressor [6], pressure regulator [7], pressure stabilizer [8], temperature-adjusting device [9] constitute link to each other the working medium quality that Electromagnetic Drive distribution device [1] regulating and controlling enters cylinder with cylinder by pipeline.
2. a kind of independent compression as claimed in claim 1, the controlled free-piston engine of air inlet thermodynamic parameter, it is characterized in that, air compressor [6], pressure stabilizer [8], temperature-adjusting device [9] are connected mutually by pipeline, pressure regulator [7] is in parallel by pipeline and air compressor [6], air compressor [6] is delivered to pressure stabilizer [8] after sucking air and compression, finish compression process, air compression pressure is by pressure regulator [7] control in real time, and temperature-adjusting device [9] is according to engine operating condition needs real-time regulated intake temperature.
3. a kind of independent compression as claimed in claim 1, the controlled free-piston engine of air inlet thermodynamic parameter, it is characterized in that, piston motion is near top dead center the time, intake valve is opened, pressurized air enters cylinder, by the Electromagnetic Drive valve control intake valve characteristics of motion, by the linear electric motor control piston characteristics of motion, thereby the assurance air inflow is through the process that takes fire immediately after extremely short air inlet, the compression process.
4. a kind of independent compression as claimed in claim 1, the controlled free-piston engine of air inlet thermodynamic parameter is characterized in that the fuel of motor is liquid fuels such as gasoline, diesel oil, or are gaseous fuels such as compressed natural gas, hydrogen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201010556925 CN101979852A (en) | 2010-11-24 | 2010-11-24 | Free piston engine with independent compression and controllable inlet air thermodynamic parameter |
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| CN 201010556925 CN101979852A (en) | 2010-11-24 | 2010-11-24 | Free piston engine with independent compression and controllable inlet air thermodynamic parameter |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103590897A (en) * | 2011-04-25 | 2014-02-19 | 靳北彪 | Free-piston engine |
| CN106285932A (en) * | 2015-06-23 | 2017-01-04 | 康柱 | Hybrid power engine |
| CN107701305A (en) * | 2017-11-05 | 2018-02-16 | 南京理工大学 | A kind of free-piston engine of stroke changeable |
| CN109488471A (en) * | 2018-12-20 | 2019-03-19 | 南京理工大学 | A kind of free-piston engine stable operation course control method for use |
| CN110486157A (en) * | 2019-09-20 | 2019-11-22 | 赵银生 | The internal combustion engine generator replied based on gravitional force |
| CN110726559A (en) * | 2019-10-22 | 2020-01-24 | 北京理工大学 | Combustion performance test bench for internal combustion engine based on rapid compression/compression expansion machine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1183133A (en) * | 1995-05-02 | 1998-05-27 | 克韦尔纳有限公司 | Power device |
| JP2000002181A (en) * | 1998-06-16 | 2000-01-07 | Matsushita Electric Ind Co Ltd | Linear compressor |
| CN1416501A (en) * | 2000-01-28 | 2003-05-07 | 克拉维斯技术公司 | Energy converter |
| CN101229776A (en) * | 2007-01-22 | 2008-07-30 | 南京理工大学 | Internal combustion-linear generating integrated power system |
| CN101341320A (en) * | 2006-08-10 | 2009-01-07 | 三菱重工业株式会社 | Multi-stage exhaust turbosupercharger |
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2010
- 2010-11-24 CN CN 201010556925 patent/CN101979852A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1183133A (en) * | 1995-05-02 | 1998-05-27 | 克韦尔纳有限公司 | Power device |
| JP2000002181A (en) * | 1998-06-16 | 2000-01-07 | Matsushita Electric Ind Co Ltd | Linear compressor |
| CN1416501A (en) * | 2000-01-28 | 2003-05-07 | 克拉维斯技术公司 | Energy converter |
| CN101341320A (en) * | 2006-08-10 | 2009-01-07 | 三菱重工业株式会社 | Multi-stage exhaust turbosupercharger |
| CN101229776A (en) * | 2007-01-22 | 2008-07-30 | 南京理工大学 | Internal combustion-linear generating integrated power system |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103590897A (en) * | 2011-04-25 | 2014-02-19 | 靳北彪 | Free-piston engine |
| CN103590897B (en) * | 2011-04-25 | 2016-08-24 | 靳北彪 | Free-piston engine |
| CN106285932A (en) * | 2015-06-23 | 2017-01-04 | 康柱 | Hybrid power engine |
| CN107701305A (en) * | 2017-11-05 | 2018-02-16 | 南京理工大学 | A kind of free-piston engine of stroke changeable |
| CN109488471A (en) * | 2018-12-20 | 2019-03-19 | 南京理工大学 | A kind of free-piston engine stable operation course control method for use |
| CN109488471B (en) * | 2018-12-20 | 2021-09-03 | 南京理工大学 | Method for controlling stable operation process of free piston engine |
| CN110486157A (en) * | 2019-09-20 | 2019-11-22 | 赵银生 | The internal combustion engine generator replied based on gravitional force |
| CN110726559A (en) * | 2019-10-22 | 2020-01-24 | 北京理工大学 | Combustion performance test bench for internal combustion engine based on rapid compression/compression expansion machine |
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Application publication date: 20110223 |