CN207348958U - Miller cycle engine combustion system - Google Patents
Miller cycle engine combustion system Download PDFInfo
- Publication number
- CN207348958U CN207348958U CN201720618397.XU CN201720618397U CN207348958U CN 207348958 U CN207348958 U CN 207348958U CN 201720618397 U CN201720618397 U CN 201720618397U CN 207348958 U CN207348958 U CN 207348958U
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- inlet valve
- cycle engine
- miller cycle
- combustion chamber
- valve
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 48
- 239000000446 fuel Substances 0.000 claims abstract description 15
- 238000002347 injection Methods 0.000 abstract description 7
- 239000007924 injection Substances 0.000 abstract description 7
- 230000033001 locomotion Effects 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 10
- 230000006835 compression Effects 0.000 description 8
- 238000007906 compression Methods 0.000 description 8
- 239000000243 solution Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000008246 gaseous mixture Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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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- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
The utility model discloses a kind of miller cycle engine combustion system, including combustion chamber, inlet valve, exhaust valve, fuel injector, spark plug, piston, the air intake duct being connected with the air inlet of combustion chamber and the airflow guide for being arranged at the air inlet of combustion chamber and making charge air flow enter from the upside of inlet valve combustion chamber, the fuel injector and the spark plug are arranged at the middle position of the inlet valve and the exhaust valve.The miller cycle engine combustion system of the utility model, air motion tissue is put direct-injection controlled technology in be combined, further excavate the drop oil consumption potentiality of miller cycle engine, have the characteristics that it is simple in structure, easily realize, efficiency of combustion is enhanced, the oil consumption of miller cycle engine can be reduced.
Description
Technical field
The utility model belongs to technical field of engines, specifically, the utility model is related to a kind of Miller cycle and starts
Machine combustion system.
Background technology
With 2003 China's entry into the WTO (World Trade Organization), the various aspects of China's economic achieve surprising quick
Under the addition of numerous autonomous national brands, competition, breaks Foreign Auto Companies to market for development, wherein car industry
Monopolization.With economic fast development, significantly being lifted also occurs in the income of the people, and automobile is used as daily necessities
Step into the average family of China.In this context, Chinese Automobile Industry ' is flourished, and volume of production and marketing is done step-by-step
Surmount Japan, Germany and the U.S., volume of production and marketing realizes the whole world first for many years.But due to China thousand people's ownership of automobile still compared with
It is low, therefore the overall ownership of automobile will continue to increase.With riseing year by year for car ownership, energy consumption and environment are dirty
Dye progressively causes the attention of country, if cannot properly tackle, it would be possible to produce energy crisis and environmental crisis.To tackle energy
The deterioration increasingly of source problem growing tension and environmental problem, automobile fuel consumption regulation and tail-gas law are also progressively plus tight.Europe
Alliance's standard requires CO in 20122Discharge to be less than 120g/km, the CO of the year two thousand twenty2Discharge will be less than 95g/km.
Miller cycle gasoline engine realizes that inlet valve early closes by parcel angular cams axis and variable valve timing system (VVT),
And maintain the compression ratio of engine to be less than expansion ratio, pinking thus can be avoided to occur and be conducive to that intake process is greatly reduced
In pumping loss, improve engine often use operating mode the thermal efficiency.Moreover, realizing big expansion ratio, make burning gases fully swollen
It is swollen and burning capacity more effectively can be converted into moment of torsion.
Conventional gasoline machine suction stroke is longer, and piston motion enhancing can be made full use of to consolidate In Cylinder Flow, formed
Stronger air inlet tumble flow, forms higher tubulence energy under squeezing action of the compression stroke latter stage in piston, realizes fast and stable
Burning, but miller cycle engine causes engine induction stroke to terminate in advance since inlet valve early closes, in the piston speed of service
Before reaching maximum, inlet valve is begun to shut off, and the Tumble intensity of formation is very weak, and the tubulence energy of compression stroke latter stage conversion is very
It is low, cause burning slow, largely limit the performance of Miller cycle drop oil consumption potentiality.
Utility model content
The utility model is intended at least solve one of technical problem existing in the prior art.For this reason, the utility model carries
For a kind of miller cycle engine combustion system, it is therefore an objective to which strengthen burning efficiency, reduces oil consumption.
In order to solve the above-mentioned technical problem, technical solution is used by the utility model：Miller cycle engine burns
System, including combustion chamber, inlet valve, exhaust valve, fuel injector, spark plug, piston, the air intake duct being connected with the air inlet of combustion chamber
It is described with the airflow guide for being arranged at the air inlet of combustion chamber and making charge air flow from the upside of inlet valve into combustion chamber
Fuel injector and the spark plug are arranged at the middle position of the inlet valve and the exhaust valve.
The airflow guide is located at the side-lower of the inlet valve.
The length direction of the airflow guide is parallel with the axis of the inlet valve.
The lift of the inlet valve is 3~7mm.
The angle of the cornerite of the IO Intake Valve Opens section is between 110~170 degree.
Pit is provided with the end face center of the piston.
The top surface of the piston is equipped with bulge-structure.
The bulge-structure sets two and two bulge-structures are located at the side of the pit respectively.
The miller cycle engine combustion system of the utility model, direct-injection controlled technology phase is put by air motion tissue with
With reference to, further excavate miller cycle engine drop oil consumption potentiality, have the characteristics that it is simple in structure, easily realize, enhance combustion
Efficiency is burnt, the oil consumption of miller cycle engine can be reduced.
Brief description of the drawings
Fig. 1 is the structure diagram of the utility model miller cycle engine combustion system；
Fig. 2 is the bottom view of the chamber structure of the utility model miller cycle engine combustion system；
Fig. 3 is the top view of top land shape；
Fig. 4 is the utility model miller cycle engine combustion system inlet guide schematic diagram；
Fig. 5 is the utility model miller cycle engine combustion system inlet and outlet door characteristics of motion curve synoptic diagram；
Mark in above-mentioned figure is：1st, cylinder cap；2nd, air intake duct；3rd, inlet valve；4th, combustion chamber；5th, exhaust valve；6th, it is vented
Road；7th, mounting hole of oil sprayer；8th, spark plug mounting hole；9th, piston；10th, pit；11st, bulge-structure；12nd, on the downside of inlet valve；13、
On the upside of inlet valve；14th, airflow guide.
Embodiment
Below against attached drawing, by the description of the embodiment, making to specific embodiment of the present utility model further detailed
Thin explanation, it is therefore an objective to help design of the those skilled in the art to the utility model, technical solution have it is more complete, accurate and
Deep understanding, and contribute to its implementation.
As shown in Figures 1 to 4, the utility model provides a kind of miller cycle engine combustion system, including combustion chamber
4th, inlet valve 3, exhaust valve 5, fuel injector, spark plug, piston 9, the air intake duct 2 being connected with the air inlet of combustion chamber 4 and it is arranged at
At the air inlet of combustion chamber 4 and make charge air flow from the upside of inlet valve 3 enter combustion chamber 4 airflow guide 14, fuel injector
The middle position of inlet valve 3 and exhaust valve 5 is arranged at spark plug.
Specifically, as shown in Figure 1 to Figure 3, two air intake ducts 2 and two exhaust ducts 6 are designed on cylinder cap 1, are set on cylinder cap 1
In respect of two inlet valves 3 and two exhaust valves 5, two sets of cam control gears are set to take inlet valve 3 and exhaust valve 5 driving to control
The lift of system, inlet valve 3 and exhaust valve 5 is non-variable valve stroke.
As shown in figure 3, the design for piston 9, is on the premise of cylinder block and head overall structure is constant, piston 9 is set
Meter meets compression ratio between 11~13, and to match compression ratio, the top surface of piston 9 is equipped with bulge-structure 11, bulge-structure 11
Protruded towards the top face of piston 9.To avoid the adverse effect that high compression ratio bulge-structure 11 forms Tumble and swirl, keeps,
At the same time avoid fiery karyomorphism into initial stage due to piston-top surface apart from spark setier closely cause excessive thermal loss to flame propagation not
Profit, a pit 10 is provided with the end face center of piston 9, bulge-structure 11 sets two and two bulge-structures 11 distinguish positions
In the side of pit 10, two bulge-structures 11 and to be symmetrical arranged, pit 10 is preferably shaped to concave spherical surface shape.
For the combustion system of the utility model by the way of fuel injector intermediate arrangement, fuel injector and spark plug are arranged in two
The middle position of inlet valve 3 and two exhaust valves 5, fuel injector and spark plug keep appropriately distance, both can guarantee that and have passed through control
Oil injection time processed and fuel injection pulsewidth, coordinate piston-top surface set by concave spherical surface shape pit 10, spark plug be formed about compared with
Dense gaseous mixture, improves combustion stability using stratified combustion, and prevents oily beam from drenching spark plug and causing spark plug fouling to fail.
As shown in figure 4, airflow guide 14 is located at the side-lower of inlet valve 3, the setting of airflow guide 14 reduce into
12 valid circulation area on the downside of valve, by stopping that air-flow enters combustion chamber 4 from the downside of inlet valve 12, guides air-flow from air inlet
Door upside 13 enters combustion chamber 4, under the shorter unfavorable conditions of miller cycle engine suction stroke, lifts air inlet Tumble and swirl,
Stronger turbulent motion is formed in time of ignition, so as to improve efficiency of combustion.
As shown in figure 4, the length direction of airflow guide 14 is parallel with the axis of inlet valve, airflow guide 14 and position
In the side-lower of inlet valve, in inlet valve opening procedure, inlet valve is moved along the length direction of airflow guide 14, and air inlet
Gap between the lower edge of door contact or both with airflow guide 14 is smaller, and 12 air-flows are flowed and are blocked on the downside of inlet valve,
So as to which charge air flow can only enter combustion chamber 4 from the upside of inlet valve 13.
As shown in figure 5, it is the inlet valve and exhaust valve movement law curve figure of the utility model combustion system, due to using
Miller cycle, the lift of inlet valve is 3~7mm, and for the angle of the cornerite of IO Intake Valve Opens section between 110~170 degree, cooperation can
Air valve variation timing technology (VVT), phase adjustment range are 60 degree, are fully excavating the same of miller cycle engine drop oil consumption potentiality
When, reach dynamic property output as high as possible.
The miller cycle engine combustion system of the utility model is due to using the arrangement put in fuel injector, burning
More flexibly, for example in middle-low load, the effect of pumping loss can be reduced to give full play to Miller cycle on control strategy, can
Using multiple Injection strategy, by increasing an oil spout in compression stroke latter stage, three-way conversion efficiency is considered, in stoichiometric air
Under the conditions of combustion ratio, by controlling oil injection time and fuel injection pulsewidth, denseer near spark plug, diluter point in 4 periphery of combustion chamber is formed
Layer gaseous mixture, improves combustion stability, improves efficiency of combustion；In the catalyst converter ignition stage, to lift delivery temperature, promote ternary
Catalyst converter reaches initiation temperature as early as possible, after last time oil spout being postponed till compression top center, again by stratified mixtures
Stably and controllable after-burning strategy is realized, to achieve the purpose that to accelerate ternary ignition, reduce discharge of poisonous waste.
In addition, the miller cycle engine combustion system of the utility model is combined with pressure charging system, Miller can be made up and followed
Ring engine suction stroke is short, deficiency of air, the shortcomings that power output is relatively low, fuel oil often is greatly reduced with operating point in vehicle
Consumption, realizes engine from Downsize (miniaturization) to Rightsize (appropriate miniaturization) successful transformation.
The utility model is exemplarily described above in conjunction with attached drawing, it is clear that the utility model implement and from
The limitation of aforesaid way, as long as employing changing for the various unsubstantialities that the methodology of the utility model and technical solution carry out
Into, or it is not improved the design of the utility model and technical solution are directly applied into other occasions, in the utility model
Protection domain within.
Claims (3)
1. miller cycle engine combustion system, including combustion chamber, inlet valve, exhaust valve, fuel injector, spark plug, piston and combustion
Burn room air inlet connection air intake duct and be arranged at the air inlet of combustion chamber and make charge air flow from the upside of inlet valve into
Enter the airflow guide of combustion chamber, it is characterised in that：The fuel injector and the spark plug are arranged at the inlet valve and described
The middle position of exhaust valve, the airflow guide are located at the side-lower of the inlet valve, the length direction of airflow guide
It is parallel with the axis of the inlet valve, pit is provided with the end face center of piston, the top surface of piston is equipped with bulge-structure,
Bulge-structure sets two and two bulge-structures are located at the side of the pit respectively.
2. miller cycle engine combustion system according to claim 1, it is characterised in that：The lift of the inlet valve is
3~7mm。
3. miller cycle engine combustion system according to claim 1 or 2, it is characterised in that：The IO Intake Valve Opens
The angle of the cornerite of section is between 110 ~ 170 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720618397.XU CN207348958U (en) | 2017-05-31 | 2017-05-31 | Miller cycle engine combustion system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720618397.XU CN207348958U (en) | 2017-05-31 | 2017-05-31 | Miller cycle engine combustion system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207348958U true CN207348958U (en) | 2018-05-11 |
Family
ID=62361993
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720618397.XU Active CN207348958U (en) | 2017-05-31 | 2017-05-31 | Miller cycle engine combustion system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207348958U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108798874A (en) * | 2018-07-23 | 2018-11-13 | 吉林大学 | Multi-cylinder miller cycle engine cooperates with air inlet energy saver and its control method |
| CN109372649A (en) * | 2018-11-27 | 2019-02-22 | 宁波吉利罗佑发动机零部件有限公司 | Engine cylinder cap and automobile |
| CN109488478A (en) * | 2018-11-26 | 2019-03-19 | 中国第汽车股份有限公司 | A kind of gasoline engine burner |
| CN110454273A (en) * | 2019-08-15 | 2019-11-15 | 柳州上汽汽车变速器有限公司柳东分公司 | A kind of combustion chamber of petrol engine |
| CN110778381A (en) * | 2019-02-22 | 2020-02-11 | 长城汽车股份有限公司 | Catalyst, engine and vehicle |
| CN111456847A (en) * | 2020-05-19 | 2020-07-28 | 上汽通用汽车有限公司 | Miller cycle supercharging direct injection gasoline engine |
| CN112081693A (en) * | 2020-09-15 | 2020-12-15 | 奇瑞汽车股份有限公司 | Miller cycle gasoline engine |
| CN112196706A (en) * | 2019-07-08 | 2021-01-08 | 上汽通用汽车有限公司 | Engine air intake system and engine system |
| CN112963238A (en) * | 2021-02-26 | 2021-06-15 | 华中科技大学 | Adiabatic internal combustion engine combustion system based on adiabatic combustion chamber and Miller cycle |
-
2017
- 2017-05-31 CN CN201720618397.XU patent/CN207348958U/en active Active
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108798874A (en) * | 2018-07-23 | 2018-11-13 | 吉林大学 | Multi-cylinder miller cycle engine cooperates with air inlet energy saver and its control method |
| CN108798874B (en) * | 2018-07-23 | 2023-09-22 | 吉林大学 | Multi-cylinder miller cycle engine collaborative air inlet energy-saving device and control method thereof |
| CN109488478A (en) * | 2018-11-26 | 2019-03-19 | 中国第汽车股份有限公司 | A kind of gasoline engine burner |
| CN109372649A (en) * | 2018-11-27 | 2019-02-22 | 宁波吉利罗佑发动机零部件有限公司 | Engine cylinder cap and automobile |
| CN110778381B (en) * | 2019-02-22 | 2022-06-21 | 长城汽车股份有限公司 | Catalyst, engine and vehicle |
| CN110778381A (en) * | 2019-02-22 | 2020-02-11 | 长城汽车股份有限公司 | Catalyst, engine and vehicle |
| CN112196706A (en) * | 2019-07-08 | 2021-01-08 | 上汽通用汽车有限公司 | Engine air intake system and engine system |
| CN110454273A (en) * | 2019-08-15 | 2019-11-15 | 柳州上汽汽车变速器有限公司柳东分公司 | A kind of combustion chamber of petrol engine |
| CN111456847A (en) * | 2020-05-19 | 2020-07-28 | 上汽通用汽车有限公司 | Miller cycle supercharging direct injection gasoline engine |
| CN112081693A (en) * | 2020-09-15 | 2020-12-15 | 奇瑞汽车股份有限公司 | Miller cycle gasoline engine |
| CN112081693B (en) * | 2020-09-15 | 2021-12-28 | 奇瑞汽车股份有限公司 | Miller cycle gasoline engine |
| CN112963238B (en) * | 2021-02-26 | 2022-02-15 | 华中科技大学 | Adiabatic internal combustion engine combustion system based on adiabatic combustion chamber and Miller cycle |
| CN112963238A (en) * | 2021-02-26 | 2021-06-15 | 华中科技大学 | Adiabatic internal combustion engine combustion system based on adiabatic combustion chamber and Miller cycle |
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