CN106677926A - Internal combustion engine structure with superheated water being sprayed into cylinder - Google Patents
Internal combustion engine structure with superheated water being sprayed into cylinder Download PDFInfo
- Publication number
- CN106677926A CN106677926A CN201611127520.4A CN201611127520A CN106677926A CN 106677926 A CN106677926 A CN 106677926A CN 201611127520 A CN201611127520 A CN 201611127520A CN 106677926 A CN106677926 A CN 106677926A
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- Prior art keywords
- combustion engine
- water
- cylinder
- internal combustion
- pressure
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/022—Adding fuel and water emulsion, water or steam
- F02M25/025—Adding water
- F02M25/03—Adding water into the cylinder or the pre-combustion chamber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting from exhaust energy
- F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting from exhaust energy the devices using heat
-
- 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
- F02B47/00—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines
- F02B47/02—Methods of operating engines involving adding non-fuel substances or anti-knock agents to combustion air, fuel, or fuel-air mixtures of engines the substances being water or steam
-
- 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
Abstract
The invention relates to an internal combustion engine structure with superheated water being sprayed into a cylinder. The internal combustion engine structure with the superheated water being sprayed into the cylinder comprises an internal combustion engine cylinder block, a throttle valve, an oil sprayer, a sparking plug and a water spraying nozzle and further comprises a condenser, a heat exchanger, a three-way electromagnetic valve, a high-pressure water rail and an electronic control unit. The condenser is connected to the exhaust output end of the internal combustion engine cylinder block. The output end of the condenser is connected with the heat exchanger and a first input end of the three-way electromagnetic valve. The output end of the heat exchanger is connected with a second input end of the three-way electromagnetic valve. The output end of the three-way electromagnetic valve is connected with the high-pressure water rail. The high-pressure water rail is connected with the water spraying nozzle. According to the internal combustion engine structure with the superheated water being sprayed into the cylinder, the high-pressure superheated water is sprayed into the cylinder, high-temperature steam is formed through flashing boiling of the superheated water, heat in the cylinder is further absorbed, the superheated water is used as an extra work doing medium, and the heat efficiency of an internal combustion engine system is improved; a control model is established to achieve real-time calculation of the pressure and temperature inside the cylinder, so that it can be guaranteed that the water sprayed into the cylinder is in the superheated state, and therefore the heat efficiency of the internal combustion engine is improved.
Description
Technical field
The invention belongs to technical field of internal combustion engines, more particularly, to a kind of Structure of Internal-Combustion Engine of cylinder injection superheated water.
Background technology
The problems of energy consumption of motor vehicles is received significant attention, and carbon dioxide is also more strict with the discharge standard of oil consumption.
In order to further improve motor vehicles work efficiency, energy resource consumption is reduced, supercharging of internal combustion engine and miniaturization technology is currently suggested,
After using higher admission pressure, cylinder volume can be reduced in the case of not wasted power with torque output, so as to reduce
Fuel consumption, small displacement boosting internal combustion engine rely on this advantage, and presenting replacement natural aspiration internal combustion engine becomes motor-driven car owner
The trend of flowing power source.
But the thermal efficiency of small displacement boosting internal combustion engine is fired phenomenon early by pinking and is limited, in order to make full use of small displacement
The potentiality of boosting internal combustion engine, in-cylinder water injection technology are arisen at the historic moment, and its feature is to absorb heat using the penetrating cold water into cylinder, from
And compression finishing temperature in cylinder is reduced, so as to avoid pinking from firing phenomenon early, can further improve such as boost pressure and pressure
Contracting ratio improves thermal efficiency performance in interior internal-combustion engine parameter.In-cylinder water injection technology has obtained the extensive pass of academia and industrial quarters
Note, such as German BMW group, group of German Bosch, Hyundai automobile group and FEV internal combustion engines consulting firm of Germany exist
Interior Duo Jia research institutions all start to be optimized research to in-cylinder water injection technology.
At the same time, the tail gas that cylinder is discharged about has taken away the heat of cylinder 1/3rd, and cold water is sprayed in current cylinder
Compression finishing temperature in cylinder can be reduced, it is to avoid phenomenon is fired in pinking early, but does not still solve a large amount of of cylinder inner exhaust gas heat
Loss problem, cylinder tail gas are discharged and waste many energy consumptions, limit the raising of internal combustion engine thermal efficiency.
The content of the invention
The purpose of the present invention is exactly to provide a kind of cylinder injection for improving internal combustion engine thermal efficiency to solve the above problems
The Structure of Internal-Combustion Engine of superheated water.
The purpose of the present invention is achieved through the following technical solutions：
A kind of Structure of Internal-Combustion Engine of cylinder injection superheated water, including internal combustion engine cylinders, described internal combustion engine cylinders are provided with section
Valve, fuel injector, spark plug and spray nozzle, the structure also include condenser, heat exchanger, three-way magnetic valve, water under high pressure rail and
Electronic control unit, described condenser are connected to the aerofluxuss outfan of internal combustion engine cylinders, condenser outfan connection heat exchanger
Input and three-way magnetic valve first input end, the second input of the outfan connecting tee electromagnetic valve of heat exchanger,
The outfan connection water under high pressure rail of three-way magnetic valve, water under high pressure rail connection spray nozzle, described air throttle, fuel injector, spark
Plug, spray nozzle and three-way magnetic valve are all connected with electronic control unit, and during work, internal combustion engine cylinders are arranged by described condenser
Water vapor condensation in gas is reclaimed, and is transported to heat exchanger and is exchanged heat with high-temperature exhaust air, and the superheated water after heat exchange passes through three-way magnetic valve
Be stored in water under high pressure rail, most after Jing spray nozzles spray into IC engine cylinder body in.
High-pressure hydraulic pump is provided between described condenser and heat exchanger, the water outlet of condenser is forced into 15- by high-pressure hydraulic pump
25MPa is transported to heat exchanger.
Described water under high pressure rail is provided with thermocouple and rail pressure sensor, and pressure transducer is provided with IC engine cylinder body, described
Thermocouple, rail pressure sensor and pressure transducer connection electronic control unit.
Described electronic control unit is provided with the control program that three-way magnetic valve opening and closing is controlled according to target injection water temperature.
Target injection water temperature in the control program presses formula Ttarget=-0.0078P4+0.3173P3-4.9057P2+
41.769P+144.33 is calculated, T in formulatargetTarget injection water temperature is represented, P represents in-cylinder pressure, surveyed by pressure transducer
.
Can be obtained by the first law of thermodynamics, in known in-cylinder pressure and the situation of volume, equation for ideal gases can be passed through
PV=nRT is calculated cylinder temperature, then by water and vapor enthalpy form, sets up fit equation Ttarget=-
0.0078P4+0.3173P3-4.9057P2+ 41.769P+144.33, in the model implantation electronic control unit, for right in real time
The water temperature of water under high pressure rail is compared with target water temperature, and heat energy comes from the high-temperature tail gas of internal combustion engine, the high pressure after heating
Water is entered in water under high pressure rail by three-way solenoid valve and is preserved, and the water temperature and pressure in water under high pressure rail is passed by thermocouple and rail pressure respectively
Sensor is measured, and electronic control unit produces the control of pulse width modulation (PWM) control signal after Current Temperatures and pressure are obtained
The opening and closing of three-way magnetic valve, three-way magnetic valve connection condensate line, can control proportion of the normal-temperature water in water under high pressure rail, from
And realize the regulation to water temperature in heat-insulated water under high pressure rail.In order to ensure that cylinder injection working medium, in superheat state, is passed using pressure
Sensor carries out Real-time Collection to in-cylinder combustion pressure process, and is obtained by the Controlling model set up in electronic control unit in real time
Target injection water temperature under different operating modes.
Compared with prior art, the present invention maintains the injection water temperature moment to be in superheat state, and high-temperature high pressure water is sprayed into cylinder
Interior, superheated water dodges anxious boiling, is evaporated to rapidly high temperature and high pressure steam, increases acting working medium, and fully absorbs in-cylinder combustion heat release,
Then piston acting is promoted, internal combustion engine thermal efficiency is improved；At the same time, the ability for spraying into the rapid additional issue of superheated water in cylinder can be with
The problem of oil dilution is prevented effectively from, improves the service life of in-cylinder water injection internal combustion engine, it is to avoid pinking, early combustion, and heat water
Heat comes from heat exchanger and tail gas energy is reclaimed, and realizes that the acting working medium in combustion process increases, reaches and recycle,
The loss of heat is reduced, the thermal efficiency of internal combustion engine is improve.
Description of the drawings
Fig. 1 is the Structure of Internal-Combustion Engine schematic diagram of cylinder injection superheated water of the present invention；
Fig. 2 is the control flow chart of the present invention；
Fig. 3 is the corresponding relation figure of in-cylinder pressure of the present invention and target injection water temperature；
In figure：1- air throttles；2- fuel injectors；3- pressure transducers；4- spark plugs；5- spray nozzles；6- thermocouples；7- rails
Pressure sensor；8- water under high pressure rails；9- three-way magnetic valves；10- electronic control units；11- heat exchangers；12- condensers；13- high pressure
Water pump；14- internal combustion engine cylinders.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
With reference to Fig. 1, a kind of Structure of Internal-Combustion Engine of cylinder injection superheated water, including air throttle 1, fuel injector 2, pressure transducer
3rd, spark plug 4, spray nozzle 5, thermocouple 6, rail pressure sensor 7, water under high pressure rail 8, three-way magnetic valve 9, electronic control unit 10,
Heat exchanger 11, condenser 12, high-pressure hydraulic pump 13, internal combustion engine cylinders 14, condenser 12 are connected to the aerofluxuss output of internal combustion engine cylinders
End, 12 outfan of condenser connection heat exchanger 11 input and three-way magnetic valve 9 first input end, heat exchanger 11 it is defeated
Go out to hold the second input of connecting tee electromagnetic valve 9, the outfan of three-way magnetic valve 9 to connect water under high pressure rail 8, water under high pressure rail 8 connects
Spray nozzle 5 is connect, the water vapor condensation in waste gas is reclaimed for aqueous water by condenser 12, and pressurizeed by high-pressure hydraulic pump 13
Transmit to 15-25MPa into heat exchanger 11 and heated, its heat energy comes from the high-temperature tail gas of internal combustion engine, after heating
Water under high pressure by three-way solenoid valve 9 enter heat-insulated water under high pressure rail 8 in preserve, the temperature and pressure in water under high pressure rail 8 is by thermoelectricity
Idol 6 and rail pressure sensor 7 are gathered, after collecting temperature, in electronic control unit 10 after with the contrast of target injection water temperature, real
When control three-way magnetic valve opening and closing, to control the temperature of 8 high temperature water under high pressure of heat-insulated water under high pressure rail.Maintain the master of injection water temperature
Syllabus be to the combustion process under different engine conditions in, by constantly in superheat state high-temperature high pressure water spray into cylinder
Interior, superheated water dodges anxious boiling, is evaporated to rapidly high temperature and high pressure steam, increases acting working medium, and fully absorbs in-cylinder combustion heat release,
Then piston acting is promoted, internal combustion engine thermal efficiency is improved；At the same time, the ability for spraying into the rapid additional issue of superheated water in cylinder can be with
The problem of oil dilution is prevented effectively from, improves the service life of in-cylinder water injection internal combustion engine, by Waste Heat Recovery and superheated water in cylinder
Injection significantly improves internal combustion engine thermal efficiency.
Fig. 2 determines the control flow chart of target injection water temperature based on real-time pressure in cylinder, and pressure transducer is sensed in cylinder
Pressure, calculates target temperature T by electronic control unittarget=-0.0078P4+0.3173P3-4.9057P2+41.769P+
144.33, target temperature is compared with the actual temperature of superheated water in water under high pressure rail, if actual temperature TrailLess than target temperature
Degree, then electromagnetic valve first input end closing, if actual temperature is more than target temperature, electromagnetic valve first input end is opened, injection
Condensed water, wherein fit equation Ttarget=-0.0078P4+0.3173P3-4.9057P2+ 41.769P+144.33 is by Fig. 3
Target water temperature and cylinder pressure signal graph of a relation are obtained, in the implanted electronic control unit of the model 10, in real time to high pressure
Water temperature in water rail 8 is compared with target temperature, and the opening and closing of three-way magnetic valve 9, threeway are controlled so as to produce pwm control signal
Electromagnetic valve 9 is connected to condensate line, can control proportion of the normal-temperature water in heat-insulated water under high pressure rail 8, so as to realize to every
The regulation of water temperature in thermal high water rail 8.
The above-mentioned description to embodiment is to be understood that for ease of those skilled in the art and apply this
It is bright.Person skilled in the art obviously easily can make various modifications to the embodiment, and described herein one
As principle be applied in other embodiment without through performing creative labour.Therefore, the invention is not restricted to embodiment here,
Those skilled in the art's announcement of the invention, the improvement made without departing from scope and modification all should be at these
Within bright protection domain.
Claims (5)
1. a kind of Structure of Internal-Combustion Engine of cylinder injection superheated water, including internal combustion engine cylinders (14), described internal combustion engine cylinders (14)
It is provided with air throttle (1), fuel injector (2), spark plug (4) and spray nozzle (5), it is characterised in that the structure also includes condenser
(12), heat exchanger (11), three-way magnetic valve (9), water under high pressure rail (8) and electronic control unit (10),
Described condenser (12) is connected to the aerofluxuss outfan of internal combustion engine cylinders (14), the connection heat exchange of condenser (12) outfan
The first input end of the input and three-way magnetic valve (9) of device (11), the outfan connecting tee electromagnetic valve of heat exchanger (11)
(9) the second input, outfan connection water under high pressure rail (8) of three-way magnetic valve (9), water under high pressure rail (8) connection spray nozzle
(5), described air throttle (1), fuel injector (2), spark plug (4), spray nozzle (5) and three-way magnetic valve (9) are all connected with electricity
Sub-control unit (10),
During work, the water vapor condensation in internal combustion engine cylinders (14) aerofluxuss is reclaimed by described condenser (12), is transported to heat exchange
Device (11) is exchanged heat with high-temperature exhaust air, and the superheated water after heat exchange is stored in water under high pressure rail (8), finally by three-way magnetic valve (9)
Jing spray nozzles (5) are sprayed in internal combustion engine cylinders (14).
2. a kind of Structure of Internal-Combustion Engine of cylinder injection superheated water according to claim 1, it is characterised in that described condensation
High-pressure hydraulic pump (13) is provided between device (12) and heat exchanger (11), it is defeated that the water outlet of condenser is forced into 15-25MPa by high-pressure hydraulic pump
It is sent to heat exchanger.
3. a kind of Structure of Internal-Combustion Engine of cylinder injection superheated water according to claim 1, it is characterised in that described high pressure
Water rail (8) is provided with thermocouple (6) and rail pressure sensor (7), and pressure transducer (3), described thermoelectricity are provided with IC engine cylinder body
Even, rail pressure sensor and pressure transducer connection electronic control unit.
4. a kind of Structure of Internal-Combustion Engine of cylinder injection superheated water according to claim 3, it is characterised in that described electronics
Control unit is provided with and controls the control program that three-way magnetic valve (9) is opened and closed according to target injection water temperature.
5. a kind of Structure of Internal-Combustion Engine of cylinder injection superheated water according to claim 4, it is characterised in that the control journey
Target injection water temperature in sequence presses formula Ttarget=-0.0078P4+0.3173P3-4.9057P2+ 41.769P+144.33 is calculated,
T in formulatargetTarget injection water temperature is represented, P represents in-cylinder pressure, measured by pressure transducer (3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611127520.4A CN106677926B (en) | 2016-12-09 | 2016-12-09 | A kind of Structure of Internal-Combustion Engine of cylinder injection superheated water |
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|---|---|---|---|
| CN201611127520.4A CN106677926B (en) | 2016-12-09 | 2016-12-09 | A kind of Structure of Internal-Combustion Engine of cylinder injection superheated water |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107989717A (en) * | 2017-09-07 | 2018-05-04 | 同济大学 | A kind of diesel engine sprayed water outside cylinder |
| CN108049940A (en) * | 2017-09-07 | 2018-05-18 | 同济大学 | The separating and reclaiming device of water in a kind of exhaust gases of internal combustion engines |
| CN108049989A (en) * | 2017-09-07 | 2018-05-18 | 同济大学 | A kind of gasoline engine sprayed water outside cylinder |
| CN108049991A (en) * | 2017-09-07 | 2018-05-18 | 同济大学 | The engine block of the double injections of hot water mixing in a kind of outer cold water tank of cylinder |
| CN108049987A (en) * | 2017-09-07 | 2018-05-18 | 同济大学 | The natural gas engine structure of the double injections of hot water mixing in a kind of outer cold water tank of cylinder |
| CN108049993A (en) * | 2017-09-07 | 2018-05-18 | 同济大学 | High temperature water supply system in a kind of reciprocating-piston Cylinder of Natural Gas Engine |
| CN108060992A (en) * | 2017-09-11 | 2018-05-22 | 同济大学 | A kind of system and control method using in-cylinder water injection control internal combustion engine homogeneity compression-ignition |
| CN108518276A (en) * | 2018-03-26 | 2018-09-11 | 陈平武 | External internal combustion engine |
| CN110005549A (en) * | 2018-01-04 | 2019-07-12 | 罗伯特·博世有限公司 | For the water injection equipment of internal combustion engine and for the method for water injection |
| CN110219752A (en) * | 2019-04-26 | 2019-09-10 | 重庆大学 | It is a kind of that closed-loop control system is fluctuated based on the hcci engine burn cycle of ionic current and in-cylinder water injection |
| CN110374764A (en) * | 2018-04-13 | 2019-10-25 | 曼·胡默尔有限公司 | Water dispenser for internal combustion engine |
| CN111237037A (en) * | 2020-01-14 | 2020-06-05 | 高长生 | High-efficient recycle engine block of heat energy |
| CN113389624A (en) * | 2021-06-11 | 2021-09-14 | 重庆大学 | Wankel engine and high-temperature water spraying based tail gas waste heat recovery efficient engine structure |
| CN114673610A (en) * | 2022-03-21 | 2022-06-28 | 东风柳州汽车有限公司 | Air supply system of engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107989717A (en) * | 2017-09-07 | 2018-05-04 | 同济大学 | A kind of diesel engine sprayed water outside cylinder |
| CN108049940A (en) * | 2017-09-07 | 2018-05-18 | 同济大学 | The separating and reclaiming device of water in a kind of exhaust gases of internal combustion engines |
| CN108049989A (en) * | 2017-09-07 | 2018-05-18 | 同济大学 | A kind of gasoline engine sprayed water outside cylinder |
| CN108049991A (en) * | 2017-09-07 | 2018-05-18 | 同济大学 | The engine block of the double injections of hot water mixing in a kind of outer cold water tank of cylinder |
| CN108049987A (en) * | 2017-09-07 | 2018-05-18 | 同济大学 | The natural gas engine structure of the double injections of hot water mixing in a kind of outer cold water tank of cylinder |
| CN108049993A (en) * | 2017-09-07 | 2018-05-18 | 同济大学 | High temperature water supply system in a kind of reciprocating-piston Cylinder of Natural Gas Engine |
| CN108060992A (en) * | 2017-09-11 | 2018-05-22 | 同济大学 | A kind of system and control method using in-cylinder water injection control internal combustion engine homogeneity compression-ignition |
| CN110005549A (en) * | 2018-01-04 | 2019-07-12 | 罗伯特·博世有限公司 | For the water injection equipment of internal combustion engine and for the method for water injection |
| CN108518276A (en) * | 2018-03-26 | 2018-09-11 | 陈平武 | External internal combustion engine |
| CN110374764A (en) * | 2018-04-13 | 2019-10-25 | 曼·胡默尔有限公司 | Water dispenser for internal combustion engine |
| CN110374764B (en) * | 2018-04-13 | 2022-09-09 | 曼·胡默尔有限公司 | Water dispenser for internal combustion engine |
| CN110219752A (en) * | 2019-04-26 | 2019-09-10 | 重庆大学 | It is a kind of that closed-loop control system is fluctuated based on the hcci engine burn cycle of ionic current and in-cylinder water injection |
| CN111237037A (en) * | 2020-01-14 | 2020-06-05 | 高长生 | High-efficient recycle engine block of heat energy |
| CN113389624A (en) * | 2021-06-11 | 2021-09-14 | 重庆大学 | Wankel engine and high-temperature water spraying based tail gas waste heat recovery efficient engine structure |
| CN114673610A (en) * | 2022-03-21 | 2022-06-28 | 东风柳州汽车有限公司 | Air supply system of engine |
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