CN207701229U - Double direct-injection systems in a kind of cylinder for inhibiting pinking - Google Patents
Double direct-injection systems in a kind of cylinder for inhibiting pinking Download PDFInfo
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- CN207701229U CN207701229U CN201721616003.3U CN201721616003U CN207701229U CN 207701229 U CN207701229 U CN 207701229U CN 201721616003 U CN201721616003 U CN 201721616003U CN 207701229 U CN207701229 U CN 207701229U
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Abstract
Double direct-injection systems in the cylinder that the utility model discloses a kind of for inhibiting pinking, including alcohols feed system, gas supply system, ECU electronic control unit and combustion chamber, combustion chamber is by air intake duct, inlet valve, spark plug, exhaust duct, exhaust valve, piston and fuel injector composition, fuel injector is made of the alcohols fuel injector of injection Aalcohols fuel and the gasoline ejector of injected petrol fuel, the oil injection time and injection pulse width of alcohols fuel injector and gasoline ejector are individually controlled by ECU electronic control unit respectively, different time for spraying by adjusting two kinds of fuel realize the transformation of different combustion modes；The different injection pulse widths for adjusting two kinds of fuel realize different combusted proportions；The difference for adjusting two kinds of fuel sprays pressure and injection interval realizes different air motions and turbulence intensity.The system can realize the coupling of different combustion modes, fuel characteristic and gas motion by changing Injection strategy, change time for spraying may be implemented homogeneous, layering and homogeneous+stratified combustion mode transformation.
Description
Technical field
The utility model belongs to the small-sized reinforcing stimulus technical field of gasoline engine more particularly to a kind of for inhibiting pinking
Double direct-injection systems in cylinder.
Background technology
It becomes increasingly conspicuous as energy supply and demand is contradictory, the active demand of environmental protection, energy-saving and environment-friendly automobile has become not
Carry out the inevitable choice of automobile industry sustainable and healthy development；As high compression ratio and the technology of high pressure-charging improve, pinking becomes limit again
Gasoline engine processed further increases the major technical barrier of the thermal efficiency.
Ethyl alcohol usage amount increases year by year in global range, and using maximum, China occupies seldom a part of proportion in the wherein U.S..
But the people visual field is further come into the popularization of ethanol petrol recently.Compared with gasoline, ethyl alcohol has many advantages, such as ethyl alcohol, example
Such as the higher latent heat of vaporization, larger octane number and faster flame propagation velocity.Utilize the thermodynamics and chemistry aspect of ethyl alcohol
The advantages of enhance inflation cooling effect and Ulva Pertusa ability, to improve the compression ratio and the thermal efficiency of spark-ignition engine.This
A little advantages, which should be used to advantage, improves the thermal efficiency and inhibition pinking in engine new technology.
Ethyl alcohol is mainly used by being pre-mixed with gasoline at present, but ethyl alcohol premixes fuel with gasoline under fixed proportion
Can not fully engine performance be improved using the advantages of ethyl alcohol.The engine to be optimal under different operating modes
Can, it needs to use different mixed proportions.In the reality of the prior art is automobile-used, generally blended using in-cylinder direct-jet ethanol petrol
Fuel, there are contradictory relations for cold start-up and inhibition pinking of this method to engine, cannot make full use of the characteristic of fuel.
Utility model content
The purpose of this utility model is to overcome deficiency in the prior art, provide in a kind of cylinder for inhibiting pinking
Double direct-injection systems, the system can realize different combustion modes, fuel characteristic and gas motion by changing Injection strategy
Coupling, change time for spraying may be implemented homogeneous, layering and homogeneous+stratified combustion mode transformation, change fuel injection pulsewidth can
To be flexibly utilized by the contradictory relation that fuel characteristic solves cold start-up and big load pinking, changes injection pressure and interval can be real
Existing different In Cylinder Flows and turbulence intensity variation.
The purpose of this utility model is achieved through the following technical solutions：
Double direct-injection systems in a kind of cylinder for inhibiting pinking, including alcohols feed system, gas supply system, ECU electricity
Unit and combustion chamber are controlled, the combustion chamber is by air intake duct, inlet valve, spark plug, exhaust duct, exhaust valve, piston and fuel injector group
At the fuel injector is made of the alcohols fuel injector of injection Aalcohols fuel and the gasoline ejector of injected petrol fuel, the alcohol
The oil injection time and injection pulse width of class fuel injector and gasoline ejector are individually controlled by ECU electronic control unit respectively, by adjusting two
The different time for spraying of kind fuel realize the transformation of different combustion modes；Different injection pulse widths by adjusting two kinds of fuel are realized
Different combusted proportions；Difference by adjusting two kinds of fuel sprays pressure and injection interval realizes different air motion and rapids
Intensity of flow.
Further, it when the time for spraying of two kinds of fuel of Aalcohols fuel and Fuel Petroleum is all in suction stroke, and is in
It when within the scope of 0 ° of TDC-180 ° of TDC, is flowed by gas in combustion chamber, two kinds of fuel form homogeneous charge in the combustion chamber；
When the time for spraying of two kinds of fuel is all in compression travel, and is within the scope of 180 ° of TDC-360 ° of TDC, pass through
It sprays fuel flow to be oriented to, two kinds of fuel form stratified mixtures in the combustion chamber；
When Aalcohols fuel time for spraying is in suction stroke, and is within the scope of 0 ° of TDC-180 ° of TDC, pass through combustion chamber
Interior gas flowing, Aalcohols fuel form homogeneous charge in the combustion chamber；When Fuel Petroleum time for spraying is in compression travel, and
When within the scope of 180 ° of TDC-360 ° of TDC, it is oriented to by spraying fuel flow, it is mixed that Fuel Petroleum forms layering in the combustion chamber
Gas is closed, forms alcohols homogeneous, the gaseous mixture that gasoline is layered；
When Fuel Petroleum time for spraying is in suction stroke, and within the scope of 0 ° of TDC-180 ° of TDC, by combustion chamber
Gas flows, and Fuel Petroleum forms homogeneous charge in the combustion chamber；Aalcohols fuel time for spraying is in compression travel
Within the scope of 180 ° of TDC-360 ° of TDC, it is oriented to by spraying fuel flow, Aalcohols fuel forms stratified mixtures in the combustion chamber；
Form gasoline homogeneous, the gaseous mixture that alcohols is layered.
Further, Fuel Petroleum is used when cold start-up and load are below 25%, ensures stability and the combustion of burning
Oily economy；Reach 80% or more in load and use Aalcohols fuel, for inhibiting pinking, improves the thermal efficiency；It is 25%- in load
By economy, dynamic property and the emission performance of ECU electronic control unit comprehensive descision Aalcohols fuels and Fuel Petroleum when between 80%, give
Go out the injection proportion of alcohols and gasoline.
Compared with prior art, advantageous effect caused by the technical solution of the utility model is：
1. by using different time for spraying, the homogeneous of different fuel easy to implement, layering and the burning of homogeneous+layering
Mode change, homogeneous combustion can ensure to run at high speed, give it the gun that it is high-power to obtain, and stratified combustion can ensure at low turn
Economy when speed, underload；
2. by using different injection pulse widths, the ratio of different fuel easy to implement.Meet engine under different operating modes
Optimal performance can solve the contradictory problems of cold start-up and big load pinking；
3. by the different air motion of the different injection pressure of two kinds of fuel of adjusting and the realization of injection interval, it is easy in fact
Turbulence intensity and stratified form in existing different combustion chamber, inhibit big load pinking；
4. in cylinder double direct-injection systems be utilized the inflation cooling effect of two kinds of fuel, especially Aalcohols fuel high vaporization it is latent
Calorific value reduces cylinder temperature, inhibits pinking；
5. two kinds of fuel of double direct-injections in cylinder, fuel evaporate atomization in cylinder, compression terminal temperature is reduced, is effectively inhibited quick-fried
Shake；
6. the stratified mixtures for the different fuel that double direct-injection systems are formed in cylinder can cut off the route of transmission of detonation wave；
7. Aalcohols fuel such as ethyl alcohol laminar flame speed is fast, fuel combustion speed can be accelerated, effectively prevent end gas
Body spontaneous combustion inhibits the generation of pinking；Tthe utility model system only needs original high compression ratio, installs one additional on engine with supercharger simultaneously
In-cylinder direct-jet system is covered, small to available engine change, technology upgrading is convenient, and industrialization prospect is good.
Description of the drawings
Fig. 1 is the structural schematic diagram of double direct-injection systems in the cylinder applied to engine；
Fig. 2 is double direct-injection system combustion process schematic diagrames in cylinder；
Fig. 3 is double direct-injection system compression process injection schematic diagrames in cylinder；
Fig. 4 is double direct-injection system Mode change schematic diagrames in cylinder；
Reference numeral：1- air intake ducts, 2- inlet valves, 3- alcohols fuel injectors, 4- spark plugs, 5- exhaust ducts, 6- exhaust valves, 7-
Gasoline ejector, 8- pistons
Specific implementation mode
The utility model will be further described below in conjunction with the accompanying drawings.
As shown in Figure 1 to Figure 3, double direct-injection systems in a kind of cylinder for inhibiting pinking, including alcohols feed system, gasoline
Feed system, ECU electronic control unit and combustion chamber, combustion chamber by air intake duct 1, inlet valve 2, spark plug 4, exhaust duct 5, exhaust valve 6,
Piston 8 and fuel injector composition, fuel injector by injection Aalcohols fuel alcohols fuel injector 3 and injected petrol fuel gasoline ejector
7 compositions, the oil injection time and injection pulse width of alcohols fuel injector 3 and gasoline ejector 7 are individually controlled by ECU electronic control unit respectively,
Different time for spraying by adjusting two kinds of fuel realize the transformation of different combustion modes；By adjusting two kinds of fuel
Different injection pulse widths realize different combusted proportions；Pressure and injection interval realization are sprayed by adjusting two kinds of the different of fuel
Different air motions and turbulence intensity.
By the transformation for adjusting the different combustion modes of realization of the different time for spraying of two kinds of fuel；By adjusting two kinds of combustions
The different injection pressure of material and the different air motion of the realization of injection interval；
The time for spraying of two kinds of fuel passes through gas in cylinder all in suction stroke, and within the scope of 0 ° of TDC-180 ° of TDC
Body flows, and two kinds of fuel form homogeneous charge in cylinder.
The time for spraying of two kinds of fuel passes through injection all in compression travel, and within the scope of 180 ° of TDC-360 ° of TDC
Fuel flow is oriented to, and two kinds of fuel form stratified mixtures in cylinder.
Aalcohols fuel time for spraying passes through gas in the jar stream in suction stroke, and within the scope of 0 ° of TDC-180 ° of TDC
Dynamic, Aalcohols fuel forms homogeneous charge in cylinder；Fuel Petroleum time for spraying is in 180 ° of TDC- in compression travel
Within the scope of 360 ° of TDC, it is oriented to by spraying fuel flow, Fuel Petroleum forms stratified mixtures in cylinder；Formation ethyl alcohol homogeneous,
The gaseous mixture of gasoline layering.
Fuel Petroleum time for spraying passes through gas in the jar stream in suction stroke, and within the scope of 0 ° of TDC-180 ° of TDC
Dynamic, Fuel Petroleum forms homogeneous charge in cylinder；Aalcohols fuel time for spraying is in 180 ° of TDC- in compression travel
Within the scope of 360 ° of TDC, it is oriented to by spraying fuel flow, Aalcohols fuel forms stratified mixtures in cylinder；Formation gasoline homogeneous,
The gaseous mixture of ethyl alcohol stratification.
The ratio of the realization different fuel of the different injection pulse widths of two kinds of fuel of adjusting can additionally be passed through；In cold start-up and
Large scale Fuel Petroleum is used when low speed Smaller load, ensures the stability of burning；Large scale ethyl alcohol is used in big load pinking
Fuel, it is big using the latent heat of vaporization of alcohol fuel, fuel octane number is high and laminar flame speed is fast the features such as；In moderate duty
Economy, dynamic property and the emission performance that alcohol fuel and Fuel Petroleum are considered by ECU control system synthesises, provide second appropriate
Alcohol gasoline injection proportion.
To sum up, Tthe utility model system can by change Injection strategy realize different combustion modes, fuel characteristic with
And the coupling of gas motion, change time for spraying may be implemented homogeneous, layering and homogeneous+stratified combustion mode transformation, change
Fuel injection pulsewidth can be flexibly utilized by fuel characteristic solve cold start-up and big load pinking contradictory relation, change injection pressure and
Different In Cylinder Flows and turbulence intensity variation may be implemented in interval, makes for the transformation of different combustion modes and the flexible of fuel
With effective method is provided, pinking can be effectively inhibited and expand the Engine Limit thermal efficiency.Fig. 4 is new by this practicality
The different technologies strategy combination that type may be implemented, the final inhibition realized to big load pinking.
The utility model is not limited to embodiments described above.Above the description of specific implementation mode is intended to describe
With illustrate the technical solution of the utility model, the above mentioned embodiment is only schematical, is not restrictive.
In the case of not departing from the utility model aims and scope of the claimed protection, those skilled in the art are in this practicality
The specific transformation of many forms can be also made under novel enlightenment, these are belonged within the scope of protection of the utility model.
Claims (3)
1. double direct-injection systems in a kind of cylinder for inhibiting pinking, including alcohols feed system, gas supply system, ECU are automatically controlled
Unit and combustion chamber, which is characterized in that the combustion chamber by air intake duct, inlet valve, spark plug, exhaust duct, exhaust valve, piston and
Fuel injector forms, and the fuel injector is by the alcohols fuel injector of injection Aalcohols fuel and the gasoline ejector group of injected petrol fuel
At the oil injection time and injection pulse width of the alcohols fuel injector and gasoline ejector are individually controlled by ECU electronic control unit respectively, are led to
The different time for spraying for overregulating two kinds of fuel realize the transformation of different combustion modes；By the different injections for adjusting two kinds of fuel
Pulsewidth realizes different combusted proportions；Difference by adjusting two kinds of fuel sprays pressure and injection interval realizes different air-flows
Movement and turbulence intensity.
2. double direct-injection systems in a kind of cylinder for inhibiting pinking according to claim 1, which is characterized in that
When the time for spraying of two kinds of fuel of Aalcohols fuel and Fuel Petroleum is all in suction stroke, and it is in 0 ° of TDC-180 ° of TDC
It when in range, is flowed by gas in combustion chamber, two kinds of fuel form homogeneous charge in the combustion chamber；
When the time for spraying of two kinds of fuel is all in compression travel, and is within the scope of 180 ° of TDC-360 ° of TDC, pass through injection
Fuel flow is oriented to, and two kinds of fuel form stratified mixtures in the combustion chamber；
When Aalcohols fuel time for spraying is in suction stroke, and is within the scope of 0 ° of TDC-180 ° of TDC, pass through the Indoor Air that burns
Body flows, and Aalcohols fuel forms homogeneous charge in the combustion chamber；When Fuel Petroleum time for spraying is in compression travel, and it is in
It when within the scope of 180 ° of TDC-360 ° of TDC, is oriented to by spraying fuel flow, Fuel Petroleum forms layering mixing in the combustion chamber
Gas forms alcohols homogeneous, the gaseous mixture that gasoline is layered；
When Fuel Petroleum time for spraying is in suction stroke, and within the scope of 0 ° of TDC-180 ° of TDC, pass through the indoor gas that burns
Flowing, Fuel Petroleum form homogeneous charge in the combustion chamber；Aalcohols fuel time for spraying is in 180 ° in compression travel
Within the scope of TDC-360 ° of TDC, it is oriented to by spraying fuel flow, Aalcohols fuel forms stratified mixtures in the combustion chamber；It is formed
The gaseous mixture that gasoline homogeneous, alcohols are layered.
3. a kind of for inhibiting double direct-injection systems in the cylinder of pinking according to claim 1, which is characterized in that in cold start-up and
Fuel Petroleum is used when load is below 25%, ensures the stability and fuel economy of burning；Reach 80% or more in load
The thermal efficiency is improved for inhibiting pinking using Aalcohols fuel；It is comprehensive by ECU electronic control unit when load is between 25%-80%
The economy, dynamic property and emission performance for judging Aalcohols fuel and Fuel Petroleum are closed, the injection proportion of alcohols and gasoline is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721616003.3U CN207701229U (en) | 2017-11-28 | 2017-11-28 | Double direct-injection systems in a kind of cylinder for inhibiting pinking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721616003.3U CN207701229U (en) | 2017-11-28 | 2017-11-28 | Double direct-injection systems in a kind of cylinder for inhibiting pinking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207701229U true CN207701229U (en) | 2018-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721616003.3U Expired - Fee Related CN207701229U (en) | 2017-11-28 | 2017-11-28 | Double direct-injection systems in a kind of cylinder for inhibiting pinking |
Country Status (1)
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| CN (1) | CN207701229U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107747517A (en) * | 2017-11-28 | 2018-03-02 | 天津大学 | It is a kind of to be used to suppress double direct-injection systems in the cylinder of pinking |
-
2017
- 2017-11-28 CN CN201721616003.3U patent/CN207701229U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107747517A (en) * | 2017-11-28 | 2018-03-02 | 天津大学 | It is a kind of to be used to suppress double direct-injection systems in the cylinder of pinking |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180807 Termination date: 20191128 |