CN110344940A - Superelevation begins to fire pressure reciprocating piston internal combustion engine and its design and production method - Google Patents
Superelevation begins to fire pressure reciprocating piston internal combustion engine and its design and production method Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
- F02F3/26—Pistons having combustion chamber in piston head
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- 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
- Y02T10/12—Improving ICE efficiencies
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- 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
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
The present invention is that superelevation begins to fire pressure reciprocating piston internal combustion engine and its design and production method, pass through construction elasticity or semi-rigid combustion chamber semi-elastic, with the preceding combustion chamber pressure of initial kindling for realizing superelevation, i.e. superelevation begins to fire pressure, the energy efficient for realizing energy in working medium converts rapidly, so that reciprocating piston internal combustion engine is theoretically similar to and close to isobaric heat cycles model, it may be implemented to increase substantially the compression ratio of internal combustion engine, increase substantially the thermal efficiency of internal combustion engine, and the discharge of nuisance can be greatly lowered simultaneously, the power performance and power per liter of internal combustion engine can also be increased substantially, realize that the superelevation that various different fuels can be used begins to fire the integrated reciprocating piston internal combustion engine of compression ignition oil.
Description
Divisional application
The application belongs to divisional application, original application are as follows:
Apply for title: internal combustion engine and its design and production method
Application number: 201811219095.0
The applying date: on October 19th, 2018.
Technical field
The present invention relates to a kind of reciprocating piston internal combustion engines.
Background technique
Reciprocating piston internal combustion engine refers to that piston does reciprocating linear motion in cylinder, and piston pin is connect with connecting rod, piston
Connecting rod is pushed, connecting rod pushes crankshaft rotation, the linear motion of piston is changed into the internal-combustion piston engine of crankshaft rotary motion.It is past
Bringing back to life piston type internal-combustion engine is using most common engine, and reciprocating piston internal combustion engine can be divided into gasoline engine, diesel oil by fuel
Machine, natural gas engine, LPG engine, ethanol engine and dual fuel engine etc., usually generally use gasoline engine and
Diesel engine.Spark ignition type and compression-ignited two class can be divided by ignition mode, gaseous fuel and anti-knock characteristic of gasoline are poor, are easy to produce quick-fried
Combustion, therefore general point of use fires ignition mode；Diesel oil anti-knock properties are good, so diesel engine all uses pressuring combustion ignition mode.
From the point of view of the history of internal combustion engine, French Lenno Yi Er (Lenoir) has invented the practical coal gas of First within 1860
Machine, the thermal efficiency are lower than 5%；1876 Otto (Nikolaus August Otto) invented quartastroke engine, the thermal efficiency reaches
To 14%, by 1884, the thermal efficiency had reached 20%；German Diesel (Diesel) invention compression ignition diesel engine in 1892, heat
Efficiency reaches 26%；This latter more than hundred years are up to now, and internal combustion engine is improved by continuous, many new technologies occur, such as
Supercharging technology, changeable air valve technology etc., internal combustion engine thermal efficiency is enhanced, and the present gasoline engine thermal efficiency is generally
35% or so, up to 40%, the diesel engine thermal efficiency is generally 40% or so, up to 46% or so；But it further increases
Internal combustion engine thermal efficiency becomes extremely difficult.On the other hand, the emission of internal combustion engine will cause environmental pollution, the harmful substance of discharge
Mainly have: oxysulfide (predominantly sulfur dioxide SO2), carbon monoxide (CO), nitrogen oxides (NOx), hydrocarbon (HC),
Particulate matter (PM), foul smell (predominantly various unburnt products, such as various aldehydes), carbon dioxide (CO2) etc., also make an uproar
Sound pollution, also containing the leaded object for antiknock in the gasoline of early stage, now all using unleaded gas, leaded object pole
It is few.
Theoretical heat cycles are to study the simplified mode of internal combustion engine thermal efficiency, have theoretical direction effect.Theoretical circulation is false
If working medium is perfect gas, make closed circulation in silent system, working medium makees adiabatic compression and adiabatic expansion, and burning is fixed
The perhaps working medium heating of level pressure, working medium heat release is constant volume heat release, and cyclic process is reversible process.Theoretical heat cycles internal combustion
Machine can derive engine efficiency calculation formula:
Isovolumetric heating circulation:
Isobaric heat cycles:
Dual cycle:
In above formula, η is the thermal efficiency；ε is compression ratio；K is the adiabatic exponent of adiabatic compression and adiabatic expansion, i.e. specific heat
Than in general, the adiabatic exponent k of monoatomic gas is 1.66, and the adiabatic exponent k of diatomic gas is 1.41, polyatom gas
The adiabatic exponent k of body is 1.33, and the adiabatic exponent of ideal dry air is about 1.4；ρ is that the volume of isobaric heating process is initially swollen
It is swollen than (cut-off ratio or pre-expansion ratio)；λ is the rate of explosion of isovolumetric heating process.
Can be seen that compression ratio is bigger, and the thermal efficiency is bigger from theoretical circulation formula, when compressing smaller, the thermal efficiency with
Compression ratio increases comparatively fast, and when compressing bigger, the thermal efficiency is slower with compression ratio increase.Isovolumetric heating circulation the thermal efficiency only with
Compression ratio is related.The case where isobaric heat cycles, in the case of compression ratio is constant, with the increase of pre-expansion ratio, the thermal efficiency
It can be gradually reduced.Dual cycle is heating identical situation, and in the case of compression ratio is constant, rate of explosion is bigger,
Pre-expansion ratio is then smaller, and the thermal efficiency will increase, otherwise the thermal efficiency can reduce；In the case of maximum pressure is constant, compression ratio is got over
Greatly, then rate of explosion is smaller, and be pre-expanded it is bigger than then, the result is that the thermal efficiency is bigger.Total analysis result is exactly to compress
Than being the principal element for influencing the thermal efficiency, compression ratio is bigger, and the thermal efficiency is bigger.
Theory is gasoline engine generally to be regarded as isovolumetric heating recycles, combustion gas with the research model actually combined at present
Turbine regards isobaric heat cycles as, and diesel engine regards dual cycle as.
The method for improving the reciprocating piston internal combustion engine thermal efficiency have increasing compression ratio (practical be expansion ratio), supercharging technology,
Miller cycle technology, exhaust gas recirculatioon technology, optimization combustion process, optimization air inlet system and exhaust system, is reduced fuel oil in-cylinder direct-jet technology
Frictional dissipation, reduction radiation loss etc., but main means are increasing compression ratios.
Due to the characteristic of fuel burning, conventional engine fuel oil mainly has gasoline and diesel oil, the anti-knock properties of diesel oil
Can be good, it can be used for diesel engine, use the ignition mode of compression ignition；Gasoline antiknock performance is poor, is easy to happen detonation, usually using point
The ignition mode of combustion, so the compression ratio of usually gasoline engine will not be very high.At present the compression ratio of gasoline engine generally 9--12 it
Between, highest Mazda engine compression ratio is even up to 14；The compression ratio of diesel engine is commonly between 12--22 at present, maximum
Even up to 25.The compression ratio of gasoline engine is usually more much lower than diesel engine, so in general, the thermal efficiency of gasoline engine is wanted
It is lower than the thermal efficiency of diesel engine.
Want increasing compression ratio by various limitations.Firstly, being the limitation of organism material；Especially gasoline engine, it is larger
Compression ratio to will lead to gasoline combustion more violent, and generate high temperature and pressure, be easy to produce detonation, cause combustion knock, from
And damage the body of engine.Second, it is to be easy to produce noxious pollutant under high temperature and high pressure environment；High temperature is more prone to produce
Nitrogen oxides (NOx), some researches show that when temperature is lower than 1800K, the generating rate of nitrogen oxides (NOx) is extremely low, therefore has
Design in order to reaching higher cylinder pressure, used the catalytic reduction technique (SCR) of exhaust aftertreatment, even with
Air-fuel ratio and exhaust gas recirculatioon technology (EGR) are reduced, with the reduction of combustion oxygen amount, cylinder pressure can be improved really and subtract
The generation of few nitrogen oxides, but due to anoxycausis but be easy to generate carbon monoxide, increase new noxious emission, institute
With increasingly strict with emission regulation, under existing technical conditions, compression ratio, which is suitably lowered just to be more advantageous to, reduces nitrogen oxygen
The generation of compound and carbon monoxide, the appropriate efficiency that reduces can just effectively reduce noxious emission, so set now with many diesel engines
Its compression ratio is counted between 14--16, compression ratio is declined compared in the past, is subtracted to reduce internal combustion engine thermal efficiency to reach
The purpose of few noxious emission.Third is the limitation of power per liter and power demand；Currently, reciprocating piston internal combustion engine is typically designed
For the mode of fixed compression ratio, adjustable compression ratio engine less is applied since structure is complicated；In fixed compression ratio
Under mode, compression ratio usually will be to be designed in the case of maximum load, and excessively high compression ratio will lead to the sky compressed when air inlet
Tolerance is less, to limit the load capacity and each amount of fuel of engine, load too low is difficult to reach the requirement of design, so
The compression ratio of general gasoline engine and diesel engine with pressurization is usually all more lower, to meet engine relatively high power and larger
The requirement of power.
Due to the application of Miller cycle technology and plenum technology, the compression ratio of engine label is actually engine
Expansion ratio, although expansion ratio to actual compression ratio with reference to effect, can not accurately be reflected as actual compression ratio,
For example the gasoline engine of Miller cycle technology is applied, no matter its compression ratio (practical is expansion ratio) has been made much, is all difficult to effectively
Improve the thermal efficiency of gasoline engine.On the other hand, engine is usually using fixed compression ratio mode, in different capacity and difference
Under revolving speed, the air inflow of engine and actual compression ratio be not identical, therefore engine is also difficult to reach it under normal circumstances
Optimal thermal efficiency mode.So want it is simple and relatively more accurate ground measured engine the thermal efficiency, it should with engine
Both fiery fore pressure (or making the combustion pressure that begins) and expansion ratio are together as judging that engine thermal efficiency factor is more accurate.Currently
Reciprocating piston internal combustion engine in, the compression ratio of gasoline engine is generally between 9--12, and kindling fore pressure (begin combustion pressure) is generally
1-2MPa or so；The compression ratio of diesel engine is generally between 12-22, and maximum can reach 25, kindling fore pressure (begin combustion pressure)
Pressure (begin combustion pressure) is compressed up to 3-5MPa or so, before the kindling of supercharged diesel engine even can achieve 5-10MPa.
In the design of real engine, it is mainly constrained to the limitation of maximum temperature and highest pressure, it is more next to meet
Stringenter discharge standard, while there is also biggish requirements for power per liter to engine and power.These limitations and demand make
The raising for obtaining the reciprocating piston internal combustion engine thermal efficiency becomes extremely difficult.
It improves the reciprocating piston internal combustion engine thermal efficiency and reduces noxious emission and although achieve biggish progress, gasoline engine heat
Efficiency is up to 40%, and the diesel engine thermal efficiency is up to 46% or so, but still very undesirable in general, internal combustion engine
The thermal efficiency all differs greatly apart from half, that is to say, that a greater part of be not all utilized of fuel oil and slattern, further increase
The reciprocating piston internal combustion engine thermal efficiency becomes the insoluble difficulty of current reciprocating piston internal combustion engine with noxious emission is effectively reduced
Topic.
Bibliography:
" 1. internal combustion engine ", China Machine Press, chief editor: Liu Shenghua, Zhou Longbao, associate editor: Han Yongqiang, Wang Zhong.
" 2. Principles of Internal-Combustion Engine ", publishing house, the Central China University of Science and Technology, chief editor: Liu Yongchang.
3. " internal combustion engine advanced technology and principle ", publishing house, University Of Tianjin write: Yao Chunde.
4. " IC Engine Design ", China Machine Press write: Yuan Zhaocheng.
5. Baidupedia entry: " internal combustion engine ", " reciprocating piston internal combustion engine ".
Summary of the invention
In order to solve the problems, such as the reciprocating piston internal combustion engine thermal efficiency lowly and reduce noxious emission, the present invention provides one
New departure of kind internal combustion engine significantly improves the reciprocating piston internal combustion engine thermal efficiency, and energy from theoretical and design and manufacture
Enough discharges that nuisance is simultaneously effective greatly lowered, moreover it is possible to increase substantially the power performance and power per liter of internal combustion engine.
It can be seen that, the accurate principal element for measuring the reciprocating piston internal combustion engine thermal efficiency is engine from technical background
Kindling fore pressure (begin combustion pressure) and expansion ratio.Mechanical efficiency and power, others limit are mainly influenced for excessive expansion ratio
System influence is simultaneously few, so main determinant is exactly catch fire fore pressure (begin combustion pressure).Theoretically compression ratio be it is more big more
It is good, but actually maximum temperature and highest pressure is limited by material and environmental requirement, and in demand also by power per liter and
The requirement of power limits, so optimal scheme should realize ram ratio from the point of view of theoretical and actual combination situation,
High compression ratio is realized in the case where small load, to realize higher kindling fore pressure (begin combustion pressure) and high expansion ratio, negative greatly
In the case of load, relatively small compression ratio is realized, to meet the requirement of big air inflow and big distributive value.But the hair of ram ratio
Motivation complicated design increases manufacture and maintenance cost, makes it difficult to realize, so being usually fixed starting for compression ratio at present
Machine implements limited adjusting to engine with air inflow, is generally all difficult to reach the desired operation of engine, it is also difficult to reach
To the higher thermal efficiency.
The present invention program is to construct elastic combustion chamber either semi-rigid combustion chamber semi-elastic, this elasticity combustion
Burn the elastic energy storage structure that room is internal combustion engine；By the way that enough elastic spaces, and the highest elasticity of design construction combustion chamber is arranged
Pressure can control burning maximum pressure under the highest elasticity pressure of combustion chamber, by setting semi-rigid combustion chamber semi-elastic
Initial elastic intensity, the pressure of the beginning flexible deformation of combustion chamber can be set；In internal combustion engine gas compression latter stage, in fuel
Combustion chamber pressure before mixed gas kindling, that is, begin combustion pressure, has substantially surmounted the beginning combustion pressure of existing internal combustion engine, has reached 10MPa pressure
More than strong, and make the pressure that combustion pressure is close to or up in a manner of full blast, even more than combustion chamber starts flexible deformation that begins
By force, it sets this beginning combustion pressure to be intended to close to burning maximum pressure, so that internal combustion engine tends to and heats close to theoretic equipressure
Circulation pattern；Pressure before the flexible deformation of combustion chamber is bigger, and closer to burning maximum pressure, then internal combustion engine adds closer to equipressure
The combustion thermal efficiency of thermal cycling profile, internal combustion engine is also bigger；That is, crucial feature is exactly, combustion of beginning is pressed in 10MPa extremely
Between burning maximum pressure, and the combustion pressure that begins is as far as possible close to burning maximum pressure.Elastic energy storage structure is made of elastic material, energy
Elastic deformation enough occurs, and storing energy is elastic potential energy, needed for being according to actual needs designed to elastic energy storage structure
Want the shape and structure of function；The effect of elastic energy storage structure is mainly exactly to convert energy rapidly, storage energy, ensure engine
Smooth operation, itself can not consume energy.All objects, which are under pressure, can all generate deformation or elastic deformation, so-called rigid
Property refer to solid or solid composition component shape and form do not change, it is unrelated with extremely faint elastic deformation；Elasticity
Deformation or elastic deformation are exactly the change of the solid relative position between object each point after by external force usually defined, when external force is removed
After disappearing, solid restores to the original state again；It is semi-rigid it is semi-elastic refer to show as rigidity under certain specified conditions, in another specified conditions
Under show as elasticity.Here so-called " combustion pressure setting of beginning is intended to approach burning maximum pressure " and the combustion pressure that begins are " as close possible to most
Large-scale combustion pressure " refers to, in engine design process, combustion chamber should be made to start the pressure of flexible deformation as far as possible close to most
Large-scale combustion pressure and maximum flexibility pressure, that is to say, that the coefficient of elasticity (or coefficient of stiffiness, stiffness factor) of combustion chamber should be use up
Measure it is small so that combustion chamber is made to start the gap of the pressure of flexible deformation, maximum combustion pressure and maximum flexibility pressure as far as possible
Reduce, to reach the mode closest to isobaric heat cycles；Certainly, due to the essence of elasticity, these three pressure are impossible phase
With, so being also impossible to realize completely ideal isobaric heat cycles mode.
Constructing elastic combustion chamber either semi-rigid combustion chamber semi-elastic, there are many methods, such as construction elasticity
Moveable cylinder head, combustion chamber be directly connected to elastic cylinder, using the long piston of elastic variable, using the elongated piston rod of elasticity
Etc., there is detailed discussion in the original application of this division, the long piston of elastic variable is briefly described below.
For conventional engine, a kind of design and production method of the elastic combustion chamber as elastic energy storage structure
It is to construct elastic variable length pistons, piston uses semi-rigid variable-length piston semi-elastic, and the length elastomeric of piston can
Become, this piston is elastic variable length pistons, is an elastic energy storage structure；Cylinder, cylinder head, piston are constituted together
Semi-rigid combustion chamber semi-elastic, this elastic combustion chamber is elastic energy storage structure；When the pressure of combustion chamber is equal to or less than preset
When definite value, piston shows as rigidity, and combustion chamber also shows as rigidity；When the pressure of combustion chamber is greater than pre-set value, piston
Elasticity is shown as, combustion chamber also shows as elasticity, and piston is elastically compressed, and piston length reduces, and can be converted into piston in working medium
In elastic potential energy, when combustion chamber pressure reduce when, piston length elasticity restore, elastic potential energy be converted into load acting.
Current reciprocating piston internal combustion engine, the combustion chamber pressure (begin combustion pressure) before kindling is between 1-10MPa, vapour
The beginning combustion pressure of oil turbine is general all smaller, and for maximum usually in 2MPa or so, gasoline engine generally uses aluminum alloy organism, maximum
Pressure is 3-8.5MPa；The beginning combustion pressure of diesel engine is larger, and generally between 3--10MPa, diesel engine generally uses cast iron
Alloy body, maximum pressure are generally 7-14MPa, and maximum is even up to 20MPa.Current gasoline engine, combustion system class
It is seemingly isovolumetric heating circulation model；Current diesel engine, similar combustion system is dual cycle model；Either gasoline
Machine or diesel engine, rate of explosion is all larger, when combustion of beginning presses through big, combustion pressure and temperature be all easy for be more than
The maximum pressure and maximum temperature that engine can bear, so that engine is destroyed or generated the harmful pollution of excess
Object.And the present invention program has been due to having used elastic combustion chamber, engine combustion of beginning is pressed in 10MPa or more, and as close possible to maximum
Burn pressure, this superelevation begins to fire pressure to be that existing reciprocating piston internal combustion engine is impossible to the beginning reached combustion pressure height, side of the present invention
The combustion system of case engine is approximating or similar to isobaric heat cycles model, mode and existing reciprocating piston internal combustion engine
Mode is entirely different, in the case where highest pressure is limited (it is constant to be equivalent to maximum pressure), theoretically it may determine that going out
The present invention program has the higher thermal efficiency.For gas working medium of the same race, specific heat at constant pressure is generally bigger than specific heat at constant volume
Much, so under same heating state, wait the volume rate of rise of die pressing types than the rate of pressure rise under equal molaies formula
It is low, and wait the maximum temperature of die pressing types much lower, this is advantageous to the generation for reducing exhaust gas nuisance, because temperature is
Generate nitrogen oxides (NOx) principal element, when temperature be lower than 1800K when, nitrogen oxides (NOx) generating rate it is extremely low, this hair
Bright scheme is considered as similar isobaric heat cycles mode, maximum combustion temperature can be effectively reduced, so as to effectively subtract
Less and control nitrogen oxides (NOx) generation so that exhaust gas discharge it is more environmentally-friendly.
The elastic combustion chamber structure of the present invention program, can control and ensure burn highest pressure setting pressure it
Under, it can be ensured that engine combustion process burns in the state of being similar to isobaric heating, to ensure the safety of engine structure,
Under the premise of ensuring the safety of engine structure, by high compression ratio, so that inlet air carries out the compression of height, it is easy to
Realize that the superelevation of the present invention program begins to fire pressure.
The present invention program can be by adjusting air inflow to realize the dynamic regulation of compression ratio (expansion ratio), to meet difference
The needs of load: when loading smaller, air inlet amount is also smaller, and the combustion pressure that begins can generally start the pressure of flexible deformation with combustion chamber
Strong essentially identical, compression ratio (expansion ratio) is larger；When loading larger, air inlet amount is also larger, when the pressure of compressed air
When starting the pressure of flexible deformation greater than combustion chamber, combustion chamber meeting flexible deformation increases, and the combustion pressure that begins can also start than combustion chamber
The pressure of flexible deformation is big, and compression ratio (expansion ratio) can become smaller, and can have more air inlet amounts to support more fuel
Burning, to realize bigger load.
Current reciprocating piston internal combustion engine is essentially all the power per liter limited resource by the way of fixed compression ratio
It is body highest pressure, maximum temperature, compression ratio, engine speed etc., most important factor is compression ratio, when compression ratio determines
Afterwards, fixed compression ratio has also determined that maximum air inlet amount, so the maximum power per liter of engine also just determines substantially
?.The present invention program begins to fire pressure due to using superelevation, and the combustion pressure that begins is greatly improved compared with diesel engine, compared with gasoline engine
Even more there is the raising of several times, in same air air inflow, actual compression ratio has at double even compared with current engine
The raising of several times, in identical compression ratio, the air inlet amount of the present invention program is more much more than conventional engines, very
To may be as many as several times (compared with gasoline engine), and the present invention program can also be as desired by air inflow to compression
Than progress dynamic regulation, full admission amount is allowed to reach 4 times of even more several times or more than the raising of existing engine,
And air inlet amount determines the quantity of fuel that per engine cycle can burn, in the case where maximum speed is constant,
The power per liter of engine is just determined substantially.The above analysis can could see that the air inlet amount of the present invention program can be promoted
To more than the several times of present engine, power per liter can also promote several times or more.
In the operational process of internal combustion engine, working condition can change frequent occurrence, such as variation, the internal combustion of payload size
Machine rotation speed change etc., but in order to ensure its thermal efficiency is able to maintain that in comparable level, regardless of its operating condition is different, it is necessary to
Ensure that the beginning combustion pressure of internal combustion engine maintains the present invention program superelevation and begins to fire the comparable level of pressure.Pressure maintenance will be begun to fire to the present invention
The method that the superelevation of scheme begins to fire voltage levels is to adjust air inlet amount using the Miller cycle of high compression ratio and combustion of beginning
Pressure；When the smaller or engine speed of load is smaller, required air inlet amount is also smaller, the engine under Miller cycle
Actual compression ratio is more much smaller than expansion ratio, but ensures that engine begins to fire the superelevation beginning combustion pressure that pressure reaches the present invention program；When negative
Carry larger or engine speed it is larger when, required air inlet amount is also larger, realize Miller cycle adjust, the reality of engine
Border compression ratio also correspondingly will be improved dynamically, to guarantee that engine maintains same level of superelevation to begin to fire pressure, to maintain like water
Flat combustion thermal efficiency；This allows for internal combustion engine in different loads or different rotating speeds, realizes that Miller cycle is adjusted, really
It protects and same level of superelevation is maintained to begin to fire pressure, to maintain like horizontal combustion thermal efficiency.Pressure maintenance will be begun to fire to present invention side
Another method that the superelevation of case begins to fire voltage levels is to adjust air inlet amount using the plenum of high compression and combustion of beginning
Pressure, when load smaller or engine speed it is smaller when, required air inlet amount is also smaller, can without using plenum or
The smaller plenum of person, but ensure that engine begins to fire the superelevation beginning combustion pressure that pressure reaches the present invention program；When load it is larger or
When engine speed is larger, required air inlet amount is also larger, is adjusted using biggish plenum, to guarantee to send out
Motivation maintains same level of superelevation to begin to fire pressure, to maintain like horizontal combustion thermal efficiency；This allows for internal combustion engine in difference
In the case of load or different rotating speeds, adjusted by using the plenum of high compression, it is ensured that same level of superelevation is maintained to begin
Combustion pressure, to maintain like horizontal combustion thermal efficiency.
In the present invention program, due to beginning, combustion pressure is very high, and the temperature before kindling is also very high, for Fuel Petroleum, if adopted
With the fuel combination mode of oil spout pre- as petrol engine, it will necessarily result in mixed gas and just occur certainly in compression process
Combustion, there is a situation where kindlings too early, this is also impossible to get a desired effect.In the present invention program, gasoline or other combustions
Material must all use the mode of pressuring combustion ignition, and one side kindling fore pressure (begin combustion pressure) and the preceding temperature of kindling are relatively high, this is
Pressuring combustion ignition provides adequate condition, and combustion process can be made very rapid；On the other hand, the present invention program is theoretical
It is upper to be similar to isobaric heat cycles model so that chamber pressure rate of rise is lower, can effectively inhibit and prevent detonation and
The generation of quick-fried vibration；There are also be exactly since the Fuel Petroleum capability of antidetonance is poor, detonation to be easy to happen, but as long as ensuring fuel mixture
Body is except the explosion ratio limit, so that it may efficiently control the generation of detonation.The explosion ratio limit refer to inflammable substance with
Air (or oxygen or other oxidants) must uniformly mix within the scope of a certain concentration, form mixed gas, and kindling will be sent out
Raw explosion, this concentration range are known as the explosion ratio limit, abbreviation explosion limit.Therefore, in the present invention program, antiknock is being used
When the fuel of performance difference, such as gasoline, it is necessary to so that the concentration of gaseous mixture is lower than the explosion ratio limit, this requires fuel to supply
Must as diesel engine, compressed air latter stage high-pressure uniform be injected into combustion chamber, to realize compression-ignited burning, and
By controlling the amount of injection fuel every time, so that its concentration is lower than the explosion ratio limit when mixture combustion, to realize thin combustion
It burns, to prevent the generation of detonation.It is less due to controlling the fuel quantity sprayed every time when mixed gas carries out lean burn, one
The requirement of load may be not achieved in secondary amount of fuel injected, can be burnt stage by stage by multiple pulses formula fuel injection, to meet
The amount of fuel combustion required for each circulating combustion, to reach the needs for meeting each repeated loading；In the present invention program,
Due to kindling fore pressure (begin combustion pressure) and before catching fire, temperature is all very high, forms gaseous mixture and delay period can be very of short duration, so combustion
Burning process also can be very short, so that burning is very rapid, can also meet the needs of multiple pulses formula fuel injection burning；It can root
The burning of pulsed fuel injection is adjusted according to the characteristic of every kind of different fuel, the amount and impulse jet to each fuel injection
Time interval can carry out adjusting appropriate according to the different characteristics of fuel combustion；Such as the gasoline that the capability of antidetonance is poor, then it presses
Its explosion ratio limit accordingly reduces each distributive value, but its burning velocity is very fast, and the time interval of each impulse jet can also
Accordingly to reduce；Diesel oil preferable for the capability of antidetonance then increase accordingly each distributive value by its explosion ratio limit, but it is fired
Burning speed is relatively slow, and the time interval of each impulse jet can also be increase accordingly；For fuel combination then according to its characteristic
With experiment or actually detected data, accordingly adjust each distributive value and impulse jet interval, with realize fuel completely smoothly
Burning；In addition, also to control to adjust the maximum (top) speed of engine according to its combustion characteristics for different oil fuels.Therefore,
In the present invention program, it is no longer necessary to distinguish gasoline engine and diesel engine, as needed, gasoline or diesel oil can be used respectively, even
Other various fuel combinations can be used, which achieves the reciprocating-piston fuel oils that various different fuels can be used integrally to send out
Motivation.
The present invention program can also be adjusted the burning of multiple pulses formula fuel injection according to combustion chamber volume.In piston
When running to vertex, the speed of piston and connecting rod is very slow, for existing reciprocating piston internal combustion engine, burning at this time
It is equivalent to isovolumetric heating, but the present invention program is to be similar to isobaric heat cycles model, is then equivalent to isobaric heating at this time, burnt
Room volume can with burning elastic dilatation, in order to ensure when mixture combustion its concentration be lower than the explosion ratio limit, with realize
Lean burn, when combustion chamber volume is smaller, the fuel quantity of each impulse jet and impulse jet interval all should be smaller, with
The elasticity of combustion chamber volume expand, the fuel quantity of each impulse jet and impulse jet interval can also increase accordingly so that
Fuel mixture can more rapidly, smoothly burn.
The present invention program realizes superelevation and begins to fire pressure, so that having high temperature and pressure before kindling, is conducive to fuel mixture
Rapid and full combustion, fuel combustion is fully in favor of the generation for reducing exhaust gas nuisance.The present invention program is as diesel engine
Using gaseous mixture pressuring combustion ignition mode, and the lower lean burn of mixture strength is used, it is also inevitable to be adopted as diesel engine
With biggish air-fuel ratio, so that the discharge of carbon monoxide is almost nil, this also greatly reduces and controls the row of exhaust gas nuisance
It puts.
The beneficial effect that the present invention program has storage more, beneficial effect all achieve significant progress, or even part beneficial to effect
Fruit is rapid progress, is now summarized as follows mentioned-above beneficial effect:
1, the thermal efficiency of reciprocating piston internal combustion engine is significantly promoted.
2, make reciprocating piston internal combustion engine theoretically be similar to isobaric heat cycles mode, and have this theoretical circulation
The advantages of mode.
3, the power per liter and power of reciprocating piston internal combustion engine are increased substantially.
4, the generation and discharge of exhaust gas nuisance is greatly reduced.
5, it is greatly lowered and is limited maximum temperature and maximum pressure, protects body from damage.
6, reciprocating-piston fuel oil integrated engine may be implemented.
Specific embodiment
Superelevation begins to fire the integrated reciprocating piston internal combustion engine of compression ignition oil
The present invention program embodiment is that superelevation begins to fire the integrated reciprocating piston internal combustion engine of compression ignition oil, and here it is combustion of beginning is pressed in
10MPa or more, and the conventional engine of various fuel oils can be used respectively.The specific design and production method of this example
Be, on the basis of existing supercharged diesel engine, to the corresponding design improvement of the works such as piston, air inlet and oil spout so that piston at
For the long piston of elastic variable, combustion chamber, which has elasticity, becomes elastic energy storage structure, so that engine reaches each of the present invention program
Item function.Engine uses cast-iron alloy body, can bear the pressure pressure of 20MPa or more；Piston uses semi-rigid semi-elastic
The elongated piston of elasticity；Piston elasticity initial pressure is set as 16MPa, maximum pressure 20MPa, maximum expansion ratio (compression ratio)
It is 60；Valve uses electric control valve, uses Miller cycle, it is ensured that the accurate air inflow of needs；Pressurization uses turbocharger；Hair
Motivation is the four cylinder engine of 1.6 liter capacities, every 0.4 liter capacity of cylinder；In the present invention program, to improve mechanical efficiency and subtracting
The pressure of light piston rod, cylinder bore are answered shorter, and piston stroke should be longer, for the sake of simplicity using volume of cylinder diameter
It is 0.82 with length ratio, can be calculated:
Actual static compress ratio (being calculated according to perfect gas adiabatic process):
ε = (P1/P0)^(1/k)
In above formula, ε is compression ratio, and P0 is compression fore pressure, and taking P0 is atmospheric pressure, and P0=0.1 MPa, P1 are compression latter stage
Pressure, i.e. combustion chamber elasticity initial pressure, P1=16MPa, k are adiabatic exponent, are taken as the adiabatic exponent of air based on conservative, k=
1.4, then actual static compress ratio are as follows:
ε = (P1/P0)^(1/k)
ε = (16/0.1)^(1/1.4)
ε ≈ 37.53
This compression ratio is exactly to apply the ratio of static compress used in Miller cycle, and actual compression ratio should be that 16MPa is marked with the combustion pressure that begins
Standard is accordingly adjusted, and needs to increase air inflow and increasing is loaded, be adjusted as needed.
Cylinder or piston diameter D, volume of cylinder length L:
V=π D^2L/4, V=0.4 * 10e (- 3) * 10e9, D=0.82*L
D^3 = 0.82*4*V/π = 1.312 * 10e6 / π = 417622.57
D ≈ 74.75 mm
L = D / 0.82 = 74.75 / 0.82 = 91.16 mm
Piston stroke S (is calculated, it is throw of crankshaft that piston stroke, which is also crankshaft rotating diameter length, by compression ratio or expansion ratio 60
2 times):
S = L - L / 60 = 91.16 - 91.16 / 60 ≈ 89.64 mm
Piston rod length l (generally 3 times of throw of crankshaft):
l = S / 2 * 3 = 89.64 / 2 * 3 = 134.46 ≈ 135 mm
Piston resiliency compressible length (is set as minimum compression ratio or expansion ratio is 8, general pre-expansion is than being no more than 4 times):
L1 = L / 8 * 4 - L / 60 = 91.16/8*4 - 91.16/60 ≈ 44 mm
(accordingly it follows that the ratio between combustion chamber maximum and minimum volume are 30 when piston is to upper vertex, that is to say, that air inlet
Amount and every circulating fuel amount at least can between 1-30 times dynamic regulation；Theoretically expansion ratio can be smaller, while maximum
Power and power can also be bigger, but the corresponding thermal efficiency can also reduce.)
Piston elasticity originates elastic force:
F1 = P1 * πD^2/4 = 16 * π * 74.75^2 / 4 ≈ 70215.38 N ≈ 7164.83 kg
The maximum elastic force of piston elasticity:
F2 = P2 * πD^2/4 = 20 * π * 74.75^2 / 4 ≈ 87769.23 N ≈ 8956.04 kg
Piston spring elastic force and coefficient of elasticity, pressure suffered by piston and the constraint to spring are determined by the above calculated result respectively
Pulling force also must be able to the standard for bearing to calculate above, piston resiliency compressible length is the elastic space of combustion chamber, be set with this
The elongated piston of meter manufacture elasticity.One critically important and crucial design of the present invention program fuel oil integrated engine is oil spout side
Formula, fuel injection system can use the high-pressure electric control common rail fuel injection system similar with existing diesel, the jet pressure of fuel oil
Power should be consistent with existing diesel, and multiple nozzle dispersion injections can be used up to 80-160MPa in injection pressure, and several times
The injection of interval pulse formula controls injection amount of fuel every time according to fuel characteristic, and space segmentation burning is burned to control with this
Journey reduces thick detonation and burns, avoids the generation of detonation.Since combustion chamber maximum temperature and pressure hold time are longer, so to work
The sealing of plug must also be reinforced.For different fuel oils, because fuel burning speed is different, in some instances it may even be possible to it can differ greatly, than
As having bigger difference if the burning velocity of gasoline and diesel oil, it is necessary to different fuel oil set corresponding injecting time and
Every the different injection modes of time, specific accurate injection and time interval needs determine afterwards after tested；For different fuel oils,
Different maximum (top) speed limitations must also be set.
The operational process of this exemplary engine.This exemplary engine be likewise supplied with common conventional engine into
Four gas, compression, burning and expansion work, exhaust working cycle process.When engine start, by automatically controlled when air inlet
Valve controls the less amount of air capacity of inspiration, but must reach pressure and temperature (the different fuel specific requirement of pressuring combustion ignition
It is different), since air inflow is less, the energy that when compression needs to consume is relatively fewer.When engine operates normally, in air inlet row
Cheng Zhong, when loading smaller, due to using Miller cycle, electric control valve is just closed in compression process, so that actual compression ratio
It is less than expansion ratio, but the combustion pressure that ensures to begin reaches the 16MPa of design, latter stage is compressed in air, in ignition advance angle (optimum igniting
Advance angle needs practical measurement) injection high pressure fuel, injection mode must be multiple interval injection, and limit the combustion sprayed every time
Oil mass, to form thin air mixture, to prevent detonation, due to being at higher temperature and pressure, the combustion of fuel oil
Burning is very rapid, and combustion chamber is equivalent to isobaric combustion in combustion process at this time, and combustion chamber elastic expansion is done work, and can also turn in working medium
The elastic potential energy for turning to piston, with the rotation of crankshaft, the conversion of engine power is to be converted into elastic potential in working medium simultaneously
It can and do work to load, after crank rotation certain angle, part can be completed in working medium and is shifted, when pressure is less than elastic force, work
It can be converted into simultaneously with elastic potential energy in matter and do work to load；When piston is close to lower dead center, electric control valve is opened, and exhaust gas is arranged
Out；This completes four courses of work of engine start.When loading larger, Miller cycle can be used and pass through automatically controlled gas
Door and booster control air inlet air capacity, increase actual compression ratio and increase plenum, with adapt to load requirement, when into
It when the air capacity entered is larger, may be partially compressed in kindling secondary piston, practical expansion ratio can be reduced, and the combustion pressure that begins also has
It is improved, the amount of fuel of per engine cycle also will increase, but the power of engine and power can be improved；It is set by this example
Meter, the expansion ratio of engine can dynamic regulation, air inlet amount and every circulating fuel amount at least can be between 8-60
Dynamic regulation is carried out between 1-30 times.
To the performance evaluation of present example.The compression ratio of gasoline engine is generally between 9--12 at present, and catch fire fore pressure
(begin combustion pressure) is generally 1-2MPa or so；The compression ratio of diesel engine is generally 12-22, and kindling fore pressure (begin combustion pressure) is reachable
3-10MPa (include the case where being pressurized)；And the compression ratio of case of the present invention is 8-60, usually 60, (the combustion of beginning of kindling fore pressure
Pressure) minimum 16 MPa；It is clear that case of the present invention is compared with current fuel engines, either actual compression
Than or kindling fore pressure (begin combustion pressure) all have a very significant increase, the even promotion of several times, the thermal efficiency and power per liter
Also inherently it is greatly improved；If being estimated that (combustion pressure and compression ratio are to begin to power and power by air inflow
Know condition, the ratio of relative atmospheric air inflow can be calculated in the inverse process of theoretical adiabatic compression), for same displacement volume
Engine, the full admission amount of case of the present invention are 5.5 times of same displacement gasoline engine or more, and full admission amount is general diesel oil
4.5 times or more of machine are 3 times or more of supercharged diesel engine (highest begins to fire pressure to be 5--10MPa)；That is, case of the present invention
The power per liter of engine is 5.5 times of gasoline engine or more, is 4.5 times or more of general diesel engine power per liter, is supercharged diesel engine
3 times or more；This still with the estimation in the case where engine same rotational speed, but actually due to the present invention program begin combustion pressure and
Temperature is all improved largely before catching fire, so the combustion process of its fuel also must more rapidly, the revolving speed of engine also must
Surely can be greatly improved, actual power per liter and power should can also than estimate above than it is bigger.By ideal model into
Row estimation (is calculated according to theoretical isobaric heat cycles model, is calculated by naive model, do not calculate turbocharging part effect
Rate, but calculate the influence of part Miller cycle), the theoretical thermal efficiency of case of the present invention is about between 66%--69%, referring to existing
Some real engine thermal efficiency and theoretical value compare, and can be evaluated whether that the actual thermal efficiency of the case of the present invention obtained is about
Between 54%--57%.
Claims (6)
1. a kind of reciprocating piston internal combustion engine, it is characterized in that: it is either semi-rigid semi-elastic to construct elastic combustion chamber
Combustion chamber, this elastic combustion chamber are the elastic energy storage structures of internal combustion engine；By the way that enough elastic spaces are arranged, and design construction fires
The highest elasticity pressure for burning room can control burning maximum pressure under the highest elasticity pressure of combustion chamber, by setting semi-rigid
The initial elastic intensity of property combustion chamber semi-elastic, can set the pressure of the beginning flexible deformation of combustion chamber；In internal combustion engine gas
Latter stage is compressed, the combustion chamber pressure before fuel mixture kindling, that is, begin combustion pressure, has substantially surmounted the beginning combustion of existing internal combustion engine
Pressure, reach 10MPa pressure or more, and make begin combustion pressure be close to or up in a manner of full blast, even more than combustion chamber open
The pressure of beginning flexible deformation sets this combustion pressure that begins and is intended to close to burning maximum pressure, so that internal combustion engine tends to and close to reason
By upper isobaric heat cycles mode；Pressure before the flexible deformation of combustion chamber is bigger, closer burning maximum pressure, then internal combustion engine
Closer to isobaric heat cycles mode, the combustion thermal efficiency of internal combustion engine is also bigger；That is, crucial be characterized in, begin
Combustion is pressed between 10MPa extremely burning maximum pressure, and the combustion pressure that begins is as far as possible close to the maximum pressure that burns.
2. a kind of design and production method of reciprocating piston internal combustion engine according to claim 1, it is characterized in that: in internal combustion engine
In gas compression processes, using high compression ratio, so that combustion chamber is begun, combustion pressure reaches 10MPa between burning maximum pressure.
3. a kind of design and production method of reciprocating piston internal combustion engine according to claim 2, it is characterized in that: passing through adjusting
Air inflow is to realize the dynamic regulation of compression ratio (expansion ratio), to meet the needs of different loads: when loading smaller, air into
Tolerance is also smaller, and the combustion pressure that begins and the pressure that combustion chamber starts flexible deformation are essentially identical, and compression ratio (expansion ratio) is larger；It is loading
When larger, air inlet amount is also larger, when the pressure of compressed air, which is greater than combustion chamber, starts the pressure of flexible deformation, combustion chamber
Meeting flexible deformation increases, and the pressure that the combustion pressure that begins can also start flexible deformation than combustion chamber is big, and compression ratio (expansion ratio) can become smaller,
There can be more air inlet amounts to support more fuel combustions, to realize bigger load.
4. a kind of design and production method of reciprocating piston internal combustion engine according to claim 2, it is characterized in that: in internal combustion engine
In gas compression processes, air inlet amount is adjusted using the Miller cycle of high compression ratio and the combustion pressure that begins, the combustion so that combustion chamber is begun
Pressure maintains to reach combustion chamber beginning combustion pressure as claimed in claim 2；When the smaller or engine speed of load is smaller, required sky
Gas air inflow is also smaller, and the actual compression ratio of engine is more much smaller than expansion ratio under Miller cycle, but ensures that engine begins
The superelevation that combustion pressure reaches the present invention program begins to fire pressure；When the larger or engine speed of load is larger, required air inlet
Amount is also larger, realizes that Miller cycle is adjusted, and the actual compression ratio of engine also correspondingly will be improved dynamically, to guarantee that engine is tieed up
It holds same level of superelevation to begin to fire pressure, to maintain like horizontal combustion thermal efficiency.
5. a kind of design and production method of reciprocating piston internal combustion engine according to claim 2, it is characterized in that: in internal combustion engine
In gas compression processes, air inlet amount is adjusted using the plenum of high compression and the combustion pressure that begins, the combustion pressure so that combustion chamber is begun
Reach combustion chamber as claimed in claim 2 to begin to fire pressure；When the smaller or engine speed of load is smaller, required air inlet
Amount is also smaller, can not use plenum or smaller plenum, but ensures that engine begins to fire to press and reach of the invention
The superelevation of scheme begins to fire pressure；When load larger or engine speed it is larger when, required air inlet amount is also larger, using compared with
Big plenum is adjusted, to guarantee that engine maintains same level of superelevation to begin to fire pressure, to maintain like horizontal combustion
Heat efficiency.
6. a kind of design and production method of reciprocating piston internal combustion engine according to claim 2, it is characterized in that: passing through control
The amount of injection fuel every time, so that its concentration is lower than the explosion ratio limit when mixture combustion, to realize lean burn, to prevent
The generation of detonation；It by multiple pulses formula fuel injection, burns stage by stage, to meet the combustion of fuel required for each circulating combustion
The amount of burning, to reach the needs for meeting each repeated loading；The spray of pulsed fuel is adjusted according to the characteristic of every kind of different fuel
Burning is penetrated, the time interval of amount and impulse jet to each fuel injection is fitted according to the different characteristics of fuel combustion
When adjusting；For different oil fuels, the maximum (top) speed of engine is also controlled to adjust according to its combustion characteristics；With this reality
The reciprocating-piston fuel oil integrated engine of various different fuels now can be used.
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| CN201910370596.7A CN110344940A (en) | 2018-10-19 | 2018-10-19 | Superelevation begins to fire pressure reciprocating piston internal combustion engine and its design and production method |
| PCT/CN2019/100321 WO2020078083A1 (en) | 2018-10-19 | 2019-08-13 | Internal combustion engine and design and fabrication method therefor |
| TW108137755A TW202043612A (en) | 2018-10-19 | 2019-10-18 | Internal combustion engine and design and fabrication method therefor |
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| CN201811219095.0A CN110344939A (en) | 2018-10-19 | 2018-10-19 | Internal combustion engine and its design and production method |
| CN201910370596.7A CN110344940A (en) | 2018-10-19 | 2018-10-19 | Superelevation begins to fire pressure reciprocating piston internal combustion engine and its design and production method |
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| CN115234387A (en) * | 2022-07-14 | 2022-10-25 | 北京理工大学 | Double-element regulation and control method for full working condition power and thermal efficiency of opposed piston engine |
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| CN111425313A (en) * | 2020-03-20 | 2020-07-17 | 唐为民 | Combined piston with variable compression ratio |
| CN114738231A (en) * | 2022-05-13 | 2022-07-12 | 耐力股份有限公司 | New forms of energy do not have oily secondary piston air compressor machine entirely |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US2323742A (en) * | 1942-03-19 | 1943-07-06 | Philip S Webster | Internal combustion engine piston |
| CN1037011A (en) * | 1988-04-15 | 1989-11-08 | 郭景坤 | Internal-combustion engine becomes the length of connecting rod variable compression ratio device |
| IT1243259B (en) * | 1990-11-08 | 1994-05-26 | Giuseppe Mignone | ENDOTHERMAL ENGINE WITH CONSTANT COMPRESSION PRESSURE AT ALL RPM, WITH COMBUSTION PRESSURE CONTROLLED AT ALL RPM, WITH VARIABLE COMBUSTION CHAMBER |
| CN1104715A (en) * | 1994-07-29 | 1995-07-05 | 徐文辉 | Energy saving internal combustion engine |
| US5769042A (en) * | 1995-04-26 | 1998-06-23 | Popadiuc; Ovidiu Petru | Method of operating an internal combustion engine during a combustion process |
| CN1188845A (en) * | 1997-01-21 | 1998-07-29 | 株式会社五十铃硅酸盐研究所 | Combustion chamber structure of engine |
| US6935299B2 (en) * | 2003-03-26 | 2005-08-30 | Siegfried Meyer | Spring-supported crankshaft coupling structure for engine |
| US7318397B2 (en) * | 2004-04-02 | 2008-01-15 | Combustion Electromagnetics Inc. | High efficiency high power internal combustion engine operating in a high compression conversion exchange cycle |
| CN2828338Y (en) * | 2005-06-01 | 2006-10-18 | 胡在权 | Expansion linkage of IC engine |
| CN100464063C (en) * | 2005-06-18 | 2009-02-25 | 秦强 | Energy accumulating engine |
| CN101042069A (en) * | 2007-04-27 | 2007-09-26 | 靳宇男 | High-efficiency engine |
| CN102606301A (en) * | 2012-04-17 | 2012-07-25 | 李德杰 | Reciprocating piston type internal combustion engine with energy storage spring |
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2018
- 2018-10-19 CN CN201910370596.7A patent/CN110344940A/en not_active Withdrawn
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| CN115234387A (en) * | 2022-07-14 | 2022-10-25 | 北京理工大学 | Double-element regulation and control method for full working condition power and thermal efficiency of opposed piston engine |
| CN115234387B (en) * | 2022-07-14 | 2023-10-10 | 北京理工大学 | Full-working-condition power and thermal efficiency binary regulation and control method for opposed-piston engine |
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| WO2020078083A1 (en) | 2020-04-23 |
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