CN208907380U - Engine underpressure burner, engine and automobile - Google Patents
Engine underpressure burner, engine and automobile Download PDFInfo
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- CN208907380U CN208907380U CN201821766632.9U CN201821766632U CN208907380U CN 208907380 U CN208907380 U CN 208907380U CN 201821766632 U CN201821766632 U CN 201821766632U CN 208907380 U CN208907380 U CN 208907380U
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- engine
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- underpressure
- burner
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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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- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Exhaust Gas After Treatment (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
The utility model belongs to technical field of engines, it is related to a kind of engine underpressure burner, engine and automobile, the engine underpressure burner includes cylinder sleeve, piston, spark plug, air intake duct, inlet valve, exhaust duct, exhaust valve, injector, direct-injection gasoline ejector, exhaust gas recirculation mechanism and electronic control unit, combustion chamber is formed in the cylinder sleeve, electronic control unit is used to control the start-up time and opening time of the exhaust valve, the exhaust gas recirculation mechanism includes separating element and one-way flow element, the exhaust duct is separated into first runner and second flow channel by the separating element, the one-way flow element is arranged on the first runner, the injector can be catalyzed the substance for generating hydrogen for spraying into the second flow channel.The engine underpressure burner of the application, post-processing can be used oxidation catalyzer substitution ternary catalyzing unit, do not need to add additional lean exhaust gas after-treatment device, reduce the structure complexity and manufacturing cost of engine.
Description
Technical field
The utility model belongs to technical field of engines, more particularly to a kind of engine underpressure burner, engine
And automobile.
Background technique
Lean burn and EGR (exhaust gas recycling) technology are with its high thermal efficiency and low oil consumption, the advantages that low NOx drainage,
New trend as current engine technology developments.
Existing lean burn is that one kind realizes stratified combustion by sucking excess air, and uses multiple fuel injection
Come formed near spark plug it is dense, around dilute fuel stratification technology, Lean Burning Technique is under the premise of guaranteeing to stablize burning
The thermal efficiency can be greatly improved.But since excess air coefficient total in cylinder is greater than 1, traditional ternary catalyzing unit pair is not available it
Emission carries out catalyzed conversion, needs to add complicated equipment for after-treatment, increases the structure complexity and cost of engine,
The difficulty of vent gas treatment increases.
Existing low pressure EGR be it is a kind of will exhaust it is cooling after be passed through before compressor and mix, be pressurized and spray into fresh air
The technology being mixed and burned in cylinder with fuel.Low pressure EGR is due to importing the position of EGR as before compressor, EGR after cooling is useless
Gas has corrosiveness to compressor, and more stringent requirements are proposed for the material and anticorrosive property to compressor.
Existing high pressure EGR be it is a kind of exhaust is passed through after compressor sprayed into together with fresh air in cylinder with fuel carry out
The technology of mixed firinor fuel burning.High pressure EGR due to import EGR position be compressor after, although can be to avoid low pressure EGR the shortcomings that,
But its operating condition greatly narrows, and is unfavorable for promoting on a large scale.
Utility model content
The technical problem to be solved by the utility model is to being directed to existing engine underpressure combustion technology, it is not available
Traditional ternary catalyzing unit carries out catalyzed conversion to emission, needs to add complicated equipment for after-treatment, increases engine
Structure complexity and the problem of cost, for this purpose, providing a kind of engine underpressure burner, engine and automobile.
In order to solve the above technical problems, on the one hand, the utility model embodiment provides a kind of engine underpressure burner,
It is returned including cylinder sleeve, piston, air intake duct, inlet valve, exhaust duct, exhaust valve, injector, direct-injection gasoline ejector, spark plug, exhaust gas
Flow mechanism and electronic control unit；
Combustion chamber is formed in the cylinder sleeve, the position that the air intake duct connects with the combustion chamber forms air inlet, described
Inlet valve can open or close the air inlet, and the position that the exhaust duct connects with the combustion chamber forms exhaust outlet, described
Exhaust valve can open or close the exhaust outlet, when the electronic control unit is used to control start-up time and the unlatching of the exhaust valve
It is long；
The direct-injection gasoline ejector is for spraying into fuel oil, the fuel oil of penetrating and the air for flowing through the air intake duct into cylinder
By the spark ignitor after mixing；
The exhaust gas recirculation mechanism includes separating element and one-way flow element, and the separating element divides the exhaust duct
Be divided into first runner and second flow channel, the one-way flow element is arranged on the first runner, the injector be used for
Injection can be catalyzed the substance for generating hydrogen in the second flow channel；
The one-way flow element permission is passed through in the instroke of engine by the exhaust gas that the combustion chamber is discharged, institute
One-way flow members block is stated to pass through in the suction stroke of engine to the exhaust gas that the combustion chamber is flowed back.
Optionally, the injector is mounted on the cylinder cap of engine and protrudes into the second flow channel.
Optionally, the separating element is partition, and the partition is consistent with the trend of the exhaust duct；
The one-way flow element is check valve, and the check valve only allows the exhaust gas in the first runner by combustion chamber
Flow to gas emission device.
Optionally, air guide face is provided at the top of the piston.
Optionally, the exhaust valve is coated with away from the surface of the piston is conducive to urge the substance that the injector sprays
Change the catalyst for generating hydrogen.
According to the engine underpressure burner of the utility model embodiment, in the suction stroke of engine, electronic control unit
Control exhaust valve is kept it turning in preset time period, so that the exhaust gas of required flow flows back to combustion chamber.In exhaust gas to combustion chamber
During reflux, the exhaust gas that one-way flow members block flows back to combustion chamber, exhaust gas passes through second flow channel flowing in combustion chamber.Cause
And in the suction stroke of engine, the start-up time and opening time of exhaust valve are controlled by electronic control unit, can freely be adjusted
Exhaust gas recirculation amount in cylinder is introduced by the second flow channel of exhaust duct, to match different engine operating conditions.By injector to
Injection can be catalyzed the substance for generating hydrogen in two runners, and the recirculating exhaust gas in second flow channel is mixed with the hydrogen generated by the substance
It generates reformed exhaust gas flow and flows into cylinder.Hydrogen in reformed exhaust gas flow helps speed up the rate of combustion reaction, in reformed exhaust gas flow
Recirculating exhaust gas helps to reduce the maximum temperature of combustion process to reduce NOx emission.In this way, HC emissions and CO etc. are oxidizable
Product assay is higher, and NOx is greatly reduced, and post-processing can directly adopt oxidation catalyzer substitution ternary catalyzing unit, and not need
Additional lean exhaust gas after-treatment device is added, the structure complexity and manufacturing cost of engine are reduced.
On the other hand, the utility model embodiment provides a kind of engine comprising above-mentioned engine underpressure, which burns, to be filled
It sets.
In another aspect, the utility model embodiment provides a kind of automobile comprising above-mentioned engine underpressure burner.
Detailed description of the invention
Fig. 1 is the schematic diagram for the engine underpressure burner that an embodiment of the present invention provides.
Appended drawing reference in specification is as follows:
1, cylinder sleeve；2, piston；201, air guide face；3, spark plug；4, air intake duct；5, inlet valve；6, exhaust duct；601, first
Runner；602, second flow channel；7, exhaust valve；8, direct-injection gasoline ejector；9, injector；10, exhaust gas recirculation mechanism；101, separate
Element；102, one-way flow element.
Specific embodiment
The technical issues of in order to keep the utility model solved, technical solution and beneficial effect are more clearly understood, below
Connection with figures and embodiment, are described in further detail the utility model.It should be appreciated that specific reality described herein
It applies example to be only used to explain the utility model, is not used to limit the utility model.
As shown in Figure 1, engine underpressure burner provided by the embodiment of the utility model, including cylinder sleeve 1, piston 2, fire
Flower plug 3, air intake duct 4, inlet valve 5, exhaust duct 6, exhaust valve 7, direct-injection gasoline ejector 8, injector 9, exhaust gas recirculation mechanism 10
And electronic control unit.
The piston 2 can move back and forth in the cylinder sleeve 1, form combustion chamber in the cylinder sleeve 1.The exhaust duct 6 with
The position that the combustion chamber connects forms exhaust outlet.The exhaust valve 7 can open or close the exhaust outlet.The electronic control unit
For controlling the start-up time and opening time of the exhaust valve 7.
The position that the air intake duct 4 connects with the combustion chamber forms air inlet.The inlet valve 5 can open or close institute
State air inlet.The air intake duct 4 is high tumble inlet port.
The direct-injection gasoline ejector 8 is for spraying into fuel oil, the fuel oil of penetrating and the sky for flowing through the air intake duct 4 into cylinder
It is lighted after gas mixing by the spark plug 3.
The exhaust gas recirculation mechanism 10 includes separating element 101 and one-way flow element 102.The separating element 101 will
The exhaust duct is separated into first runner 601 and second flow channel 602, and the one-way flow element 102 is arranged described first-class
On road 601.
The injector 9 is mounted on the cylinder cap of engine and protrudes into the second flow channel 602, and the injector 9 is used for
Into the second flow channel 602, injection can be catalyzed the substance for generating hydrogen.The substance, such as can be water or Aalcohols fuel.
In the instroke of engine, the electronic control unit controls the exhaust valve 7 and entire stroke is kept to open, the list
Allow to be passed through by the exhaust gas that the combustion chamber is discharged to flow-through element 102, the exhaust gas of the combustion chamber discharge passes through described first
Runner 601 and second flow channel 602 flow to gas emission device.
In the suction stroke of engine, the electronic control unit controls the exhaust valve 7 and keeps it turning in preset time period, with
The exhaust gas of required flow is set to flow back to the combustion chamber；During exhaust gas flows back to the combustion chamber, the one-way flow
Element 102 stops the exhaust gas (exhaust gas of reflux cannot be by first runner 601) to flow back to the combustion chamber, the combustion chamber Xiang Suoshu
The exhaust gas of reflux passes through 602 flowing in combustion chamber of second flow channel.
According to the engine underpressure burner of the utility model embodiment, in the suction stroke of engine, by automatically controlled
Unit controls the start-up time and opening time of exhaust valve 7, can freely adjust and introduce cylinder by the second flow channel 602 of exhaust duct 6
Interior exhaust gas recirculation amount, to match different engine operating conditions.Life can be catalyzed by being sprayed by injector 9 into second flow channel 602
At the substance of hydrogen, the recirculating exhaust gas in second flow channel 602 is mixed with the hydrogen generated by the substance generates reformed exhaust gas flow cocurrent
Enter in cylinder.When engine is in small load condition, when electronic control unit controls exhaust valve 7 corresponding to the later period of suction stroke
Between section keep it turning on, with control reformed exhaust gas flow time of ignition just move to 2 surface of piston formed thermal insulation layer, reduce combustion gas
Heat transfer of the body to engine body.When engine is in high load working condition, electronic control unit controls exhaust valve 7 in suction stroke
Early period corresponding to the period keep it turning on.Hydrogen in reformed exhaust gas flow helps speed up the rate of combustion reaction, reforms useless
Recirculating exhaust gas in gas helps to reduce the maximum temperature of combustion process to drop low NOx drainage.In this way, HC emissions and CO etc.
Oxidizable product assay is higher, and NOx is greatly reduced, and post-processing can directly adopt oxidation catalyzer substitution ternary catalyzing unit, and
It does not need to add additional lean exhaust gas after-treatment device, reduces the structure complexity and manufacturing cost of engine.
In addition, the utility model embodiment using reflux reformed exhaust gas flow, can not only possess EGR technology inhibit pinking,
The advantages that reducing NOx emission and reducing heat transfer loss, while compensating for the shortcoming of EGR technology.There is no low pressure EGRs to pressure
The particular/special requirement of mechanism of qi, also operating condition of test is limited unlike high pressure EGR.When controlling the unlatching of exhaust valve 7 by electronic control unit
The reformed exhaust gas flow amount controlled into cylinder and position is carved with opening time theoretically may be used to match different engine operating conditions
To be suitable for the full MAP operation of engine.
In addition, adjusting compared to the closed loop of EGR technology, bring is sluggish, and the utility model embodiment can be at once in subsequent cycle
It is adjusted according to flow of the change of operating condition to recirculating exhaust gas, in terms of transient condition performance and discharge advantageously.
In addition, recirculating exhaust gas novelty combination exhaust gas reforming technique, water or Aalcohols fuel are urged what exhaust valve surface coated
The hydrogen that agent is catalytically decomposed, helps speed up initial combustion rates in cylinder, and the presence of exhaust gas helps to reduce burned
To reduce NOx emission, the two complements each other journey maximum temperature.
In one embodiment, as shown in Figure 1, the separating element 101 is partition, the partition and the exhaust duct 6
Trend is consistent.It is further preferable that the partition extended along the center line of the exhaust duct 6, the one-way flow element 102 is
The exhaust duct 6 is separated into the first runner 601 and the second flow channel 602, the check valve by check valve, the partition
It is fixed on the inner wall of the first runner 601.The check valve only allows the exhaust gas in first runner 60 by combustion chamber
Flow to gas emission device.The setting of check valve enables exhaust gas swimmingly in instroke through first runner 601 and the
The discharge of two runners 602, but blocking of the exhaust gas recirculation in reflux course in first runner 601 by check valve, reflux are given up
Gas can only be flowed into cylinder by second flow channel 602, tentatively realize exhaust gas inside cylinder layering.
In one embodiment, as shown in Figure 1, the top of the piston 2 is provided with air guide face 201.Utilize band air guide face 201
2 guide cylinder of piston in working medium keep stronger tumble flow state in compression process, realize the hot EGR layering in cylinder.
In the exhaust gas recirculation stage, injector 9 sprayed into second flow channel 602 can give birth to catalysis generate hydrogen substance (such as
Water or Aalcohols fuel), which is broken down into the gas comprising hydrogen under the action of the catalyst smeared by 7 back side of exhaust valve
Body, the gas comprising hydrogen and recirculating exhaust gas are mixed to form reformed exhaust gas flow and enter in cylinder, preliminarily form reformed exhaust gas flow layering.
Fresh air is entered in cylinder by high tumble inlet port 4, the reformed exhaust gas flow of reflux is swept along, with air guide face 201
Piston 2 maintains stronger tumble flow state under guiding in compression process, realize internal combustion mixture (fresh air and fuel oil
Mixture), hot EGR layering (exhaust gas layering) in the cylinder of external reformed exhaust gas flow.
In the suction stroke of engine, in-cylinder direct-jet is main injection, it is intended to spray into fuel oil required for output power torque
Amount, herein, direct-injection gasoline ejector 8 is according to the different operating condition of engine to cylinder injection 1 time or 2 fuel oils.Starting
The middle section of the compression travel of machine, direct-injection gasoline ejector 8 is to 1 fuel oil of cylinder injection (a small amount of fuel oil).Due to in-cylinder pressure by
It is cumulative plus, Spray penetration distance shortens, and oil gas is focusing more on 3 near zone of spark plug, facilitate sub-sequent fire karyomorphism at burning
Stablize.
When piston 2 runs near top dead center, 3 arcing of spark plug, combustion mixture starts to burn.
When engine is in small load condition, exhaust valve 7 is controlled corresponding to the later period of suction stroke by electronic control unit
Period keep it turning on, control reformed exhaust gas flow is gathered in 2 surface of piston in time of ignition and forms thermal insulation layer, mixed to reduce burning
Heat transfer of the gas to engine body is closed, the thermal efficiency is improved.
When engine is in high load working condition, exhaust valve 7 is controlled corresponding to the early period of suction stroke by electronic control unit
Period keep it turning on, control reformed exhaust gas flow be gathered near spark plug 3 in time of ignition, the hydrogen in reformed exhaust gas flow helps
Exhaust gas section in the chemical reaction for accelerating gaseous mixture, reformed exhaust gas flow helps the maximum temperature for reducing combustion process to reduce
NOx emission.
In addition, the utility model embodiment also provides a kind of engine comprising the engine underpressure of above-described embodiment fires
Burn device.
In addition, the utility model embodiment also provides a kind of automobile comprising the engine underpressure of above-described embodiment burns
Device.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (7)
1. a kind of engine underpressure burner, which is characterized in that including cylinder sleeve, piston, spark plug, air intake duct, inlet valve, row
Air flue, exhaust valve, injector, direct-injection gasoline ejector, exhaust gas recirculation mechanism and electronic control unit；
Combustion chamber is formed in the cylinder sleeve, the position that the air intake duct connects with the combustion chamber forms air inlet, the air inlet
Door can open or close the air inlet, and the position that the exhaust duct connects with the combustion chamber forms exhaust outlet, the exhaust
Door can open or close the exhaust outlet, and the electronic control unit is used to control the start-up time and opening time of the exhaust valve；
For spraying into fuel oil into cylinder, the fuel oil of penetrating mixes the direct-injection gasoline ejector with the air for flowing through the air intake duct
Afterwards by the spark ignitor；
The exhaust gas recirculation mechanism includes separating element and one-way flow element, and the exhaust duct is separated by the separating element
First runner and second flow channel, the one-way flow element are arranged on the first runner, and the injector is used for described
Injection can be catalyzed the substance for generating hydrogen in second flow channel；
The one-way flow element permission is passed through in the instroke of engine by the exhaust gas that the combustion chamber is discharged, the list
It is blocked in the suction stroke of engine to flow-through element and passes through to the exhaust gas that the combustion chamber is flowed back.
2. engine underpressure burner according to claim 1, which is characterized in that the injector is mounted on engine
Cylinder cap on and protrude into the second flow channel.
3. engine underpressure burner according to claim 1, which is characterized in that the separating element is partition, institute
It is consistent with the trend of the exhaust duct to state partition；
The one-way flow element is check valve, and the check valve only allows the exhaust gas in the first runner to be flowed to by combustion chamber
Gas emission device.
4. engine underpressure burner according to claim 1, which is characterized in that be provided with and lead at the top of the piston
Gas face.
5. engine underpressure burner according to claim 1, which is characterized in that the exhaust valve deviates from the piston
Surface be coated with the catalyst of substance catalyst generation of hydrogen for being conducive to spray the injector.
6. a kind of engine, which is characterized in that including engine underpressure burner described in claim 1-5 any one.
7. a kind of automobile, which is characterized in that including engine underpressure burner described in claim 1-5 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821766632.9U CN208907380U (en) | 2018-10-29 | 2018-10-29 | Engine underpressure burner, engine and automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821766632.9U CN208907380U (en) | 2018-10-29 | 2018-10-29 | Engine underpressure burner, engine and automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208907380U true CN208907380U (en) | 2019-05-28 |
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ID=66614548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821766632.9U Active CN208907380U (en) | 2018-10-29 | 2018-10-29 | Engine underpressure burner, engine and automobile |
Country Status (1)
| Country | Link |
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| CN (1) | CN208907380U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110284999A (en) * | 2019-06-26 | 2019-09-27 | 浙江吉利控股集团有限公司 | A kind of lean-burn systems and vehicle |
| CN111102068A (en) * | 2018-10-29 | 2020-05-05 | 广州汽车集团股份有限公司 | Engine lean combustion device, control method, engine and automobile |
-
2018
- 2018-10-29 CN CN201821766632.9U patent/CN208907380U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111102068A (en) * | 2018-10-29 | 2020-05-05 | 广州汽车集团股份有限公司 | Engine lean combustion device, control method, engine and automobile |
| CN111102068B (en) * | 2018-10-29 | 2024-06-07 | 广州汽车集团股份有限公司 | Engine lean combustion device, control method, engine and automobile |
| CN110284999A (en) * | 2019-06-26 | 2019-09-27 | 浙江吉利控股集团有限公司 | A kind of lean-burn systems and vehicle |
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