CN105545557B - Gas and EGR (exhaust gas recirculation) combined direct injection system - Google Patents
Gas and EGR (exhaust gas recirculation) combined direct injection system Download PDFInfo
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- CN105545557B CN105545557B CN201610081619.9A CN201610081619A CN105545557B CN 105545557 B CN105545557 B CN 105545557B CN 201610081619 A CN201610081619 A CN 201610081619A CN 105545557 B CN105545557 B CN 105545557B
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- egr
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- pump
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- 238000002347 injection Methods 0.000 title claims abstract description 17
- 239000007924 injection Substances 0.000 title claims abstract description 17
- 230000008676 import Effects 0.000 claims abstract description 36
- 239000007789 gas Substances 0.000 claims description 134
- 239000000567 combustion gas Substances 0.000 claims description 69
- 239000002737 fuel gas Substances 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims 1
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 238000002485 combustion reaction Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 6
- 230000001052 transient effect Effects 0.000 description 6
- 239000000446 fuel Substances 0.000 description 5
- 230000004044 response Effects 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000008246 gaseous mixture Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
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
- F02M57/00—Fuel-injectors combined or associated with other devices
-
- 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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/38—Pumps characterised by adaptations to special uses or conditions
-
- 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
-
- 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
- F02M2700/00—Supplying, feeding or preparing air, fuel, fuel air mixtures or auxiliary fluids for a combustion engine; Use of exhaust gas; Compressors for piston engines
- F02M2700/07—Nozzles and injectors with controllable fuel supply
- F02M2700/077—Injectors having cooling or heating means
-
- 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
- F02M2700/00—Supplying, feeding or preparing air, fuel, fuel air mixtures or auxiliary fluids for a combustion engine; Use of exhaust gas; Compressors for piston engines
- F02M2700/13—Special devices for making an explosive mixture; Fuel pumps
- F02M2700/1317—Fuel pumpo for internal combustion engines
- F02M2700/1335—Fuel pump combined with the fuel injector
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The utility model provides a direct injection system is united to gas and EGR, wherein low pressure EGR union coupling blast pipe and high pressure EGR pipe, install the low pressure EGR valve on the low pressure EGR pipe, install high pressure EGR valve on the high pressure EGR pipe, EGR pump import be connected with exhaust manifold through high pressure EGR pipe, EGR pump export is connected with EGR gas rail import, EGR gas rail export is connected with the EGR nozzle through the EGR supply tube, the EGR nozzle is installed on the cylinder or is close to in the intake duct of cylinder, liquefied gas bottle export be connected with gas pump import, gas pump export is connected with gas rail import, gas rail export is connected with the gas nozzle through the gas supply tube, the gas nozzle is installed on the cylinder or is close to in the intake duct of cylinder.
Description
Technical field
The present invention relates to a kind of direct-injection system, more specifically to a kind of combustion gas and EGR combine direct-injection system, belong to combustion
The exhaust gas recirculatioon in mechanism of qi field（EGR）And gas supply system technical field.
Background technology
Currently, in face of increasingly severe environmental crisis, requirement of the various countries to emission regulation is increasingly stringenter, therefore the row of reduction
Put the Main way as internal combustion engine development.It is gradually taken seriously by the clean fuel of representative of natural gas, numerous studies show
More traditional petrol and diesel oil machine is discharged using the gas engine of clean fuel to be greatly reduced；The clean fuels such as natural gas are replaced as one kind simultaneously
Replacing fuel can alleviate demand of the China to oil to a certain degree.On the other hand, egr system is as reduction internal combustion engine NOxDischarge
Effective emission controls by improving combustion measure and low emission gas engine one of important technology route.Traditional egr system, by arranging
EGR circuit is established between tracheae and air inlet pipe, introduce exhaust gas into gas handling system and is mixed with fresh charge, then with fresh charge
Burning is participated in into cylinder, realizes the control to fire emission.Traditional egr system simple possible still exists
Following problem：On the one hand, there are operating lag effects for egr system, are likely to occur in acceleration or loading procedure excessive
EGR rates cause emission to steeply rise, are incomplete combustion, unstable or even catch fire；On the other hand, when EGR rates are larger,
Largely exhaust is introduced into air inlet pipe, and exhaust and the mixed effect of fresh charge are deteriorated, and cause EGR mixing and each cylinder EGR distribution
Unevenness, keeps part cylinder concentration of emission excessively high and combustion instability, and discharge and performance to engine have an adverse effect.
Chinese Patent Application No. be 201120382503.1, it is entitled《A kind of exhaust gas recirculation structure of diesel engine》
Utility model patent describe a kind of EGR structures of diesel engine, by increasing between EGR valve and inlet manifold
EGR distribution pipes make the EGR rate of each cylinder be easier to reach uniform.Chinese Patent Application No. is CN201210080055.9, entitled
《A kind of solution EGR drives the method and system of stagnant ring》Patent of invention describe a kind of solution EGR drive stagnant ring method and
System, the contact between variation tendency and EGR characteristic curves by establishing the actually required aperture of EGR are eliminated due to becoming
EGR drives hysteresis caused by change trend is inconsistent.But above-mentioned patent is the improvement to convention EGR systems, it cannot
The problems such as fundamentally solution EGR delays and EGR amount accurately control；Therefore, still none of these methods can be well at present
Under solution transient condition the problems such as the operating lag of EGR, accurately controlling for EGR systems is still internal combustion engine under transient condition
One, field urgent need to solve the problem.
Invention content
It is an object of the invention to be directed to the delay of existing egr system, the problems such as EGR amount accurately controls, a kind of combustion is provided
Gas and EGR combine direct-injection system.
To achieve the above object, technical solution of the invention is：A kind of combustion gas and EGR combine direct-injection system, including
Compressor, turbine, air intake intercooler, engine, cylinder, low pressure EGR tube, the compressor air inlet machine mouth are connected with air inlet pipe
It connects, compressor gas outlet is connected by compressor escape pipe with air intake intercooler import, and air intake intercooler outlet is logical
It crosses inlet manifold with engine to be connected, the turbine inlet is connected by exhaust main with engine, and turbine goes out
Mouthful be connected with exhaust pipe, be connected by connecting shaft between the compressor and turbine, further include have high pressure EGR tube,
EGR pumps, EGR gas rail, EGR nozzles, liquefaction gas bottle, gas pump, combustion gas rail and gas nozzle, low pressure EGR tube connection
Exhaust pipe and high pressure EGR tube are equipped with low pressure EGR valve on low pressure EGR tube, high pressure EGR valve are equipped on high pressure EGR tube, described
EGR pump inlets be connected with exhaust main by high pressure EGR tube, EGR pump discharges are connected with EGR gas rail imports, described
The outlet of EGR gas rails is connected by EGR supply pipes with EGR nozzles, and the EGR nozzles are mounted on cylinder or close to cylinder
In air intake duct, liquefaction gas bottle outlet is connected with combustion gas pump inlet, the combustion gas pump discharge and combustion gas rail import
It is connected, combustion gas rail outlet is connected by gas supply pipe with gas nozzle, and the gas nozzle is mounted on gas
In air intake duct on cylinder or close to cylinder.
Further include having cooler, the cooler EGR import pumps out tracheae by EGR and is connected with EGR pump discharges, cold
But device EGR outlet is connected by EGR gas rail connecting tubes with EGR gas rail imports, and the cooler fuel gas inlet passes through combustion gas
It pumps out tracheae with combustion gas pump discharge to be connected, cooler gas outlet is connected by combustion gas rail connecting tube with combustion gas rail import.
Further include having EGR filters, the EGR filter inlets are connected with high pressure EGR tube, EGR filter outlets
Air inlet pipe is pumped by EGR with EGR pump inlets to be connected.
Further include having gas filter, the gas filter is arranged between liquefaction gas bottle and gas pump, combustion gas
Filter inlet is connected by the outlet of gas header pipe and liquefaction gas bottle, gas filter outlet by gas pump air inlet pipe with
Combustion gas pump inlet is connected, and gas pressure-reducing valve is provided on the gas header pipe.
Compared with prior art, the beneficial effects of the invention are as follows：
1, EGR pump inlets are connected by high pressure EGR tube with exhaust main in the present invention, EGR pump discharges and EGR gas rail into
Mouth is connected, and the outlet of EGR gas rails is connected by EGR supply pipes with EGR nozzles, and EGR nozzles are mounted on cylinder or close to gas
In the air intake duct of cylinder；The outlet of liquefaction gas bottle is connected with combustion gas pump inlet, and combustion gas pump discharge is connected with combustion gas rail import, combustion
The outlet of gas rail is connected by gas supply pipe with gas nozzle, and gas nozzle is mounted on the air intake duct on cylinder or close to cylinder
It is interior.By 22 liang of set gas rails of combustion gas rail 33 and EGR gas rail, and combustion gas rail and EGR gas rails are maintained by gas pump and EGR pumps respectively
Interior pressure；Combustion gas is accurately controlled by combustion gas and EGR nozzles and EGR enters in cylinder the moment, sprays into combustion gas and EGR amount in cylinder, it is real
The quick response of existing combustion gas and EGR, effectively avoids combustion gas and EGR operating lags, eliminates the sound of conventional gas supply and egr system
The problems such as uneven with each cylinder branch should be lagged.
2, the exchanger in the present invention cools down EGR using combustion gas cold, reduces the gasification demand for heat of low temperature combustion gas
And the cooling requirement of high temperature EGR, improve engine power utilization ratio.
3, two kinds of EGR circuits of high pressure and low pressure are established in the present invention, by controlling high pressure EGR valve and low pressure EGR valve control
EGR pumpings gas mode processed realizes and flexibly takes gas strategy.
Description of the drawings
Fig. 1 is schematic structural view of the invention.
In figure, air inlet pipe 1, compressor 2, connecting shaft 3, turbine 4, compressor escape pipe 5, air intake intercooler 6, air inlet is total
Pipe 7, engine 8, cylinder 9, exhaust main 10, exhaust pipe 11, low pressure EGR tube 12, low pressure EGR valve 13, high pressure EGR valve 14 are high
EGR pipe 15, EGR charge air coolers 16, EGR is pressed to pump air inlet pipe 17, EGR pumps 18, EGR and pumps out tracheae 19, cooler 20, and EGR gas rails connect
Take over 21, EGR gas rail 22, EGR supply pipes 23, EGR nozzles 24, liquefaction gas bottle 25, gas header pipe 26, gas pressure-reducing valve 27,
Gas filter 28, gas pump air inlet pipe 29, gas pump 30, gas pump escape pipe 31, combustion gas rail connecting tube 32, combustion gas rail 33,
Gas supply pipe 34, gas nozzle 35.
Specific implementation mode
Below in conjunction with description of the drawings, the present invention is described in further detail with specific implementation mode.
Referring to Fig. 1, a kind of combustion gas and EGR combine direct-injection system, including compressor 2, turbine 4, air intake intercooler 6, hair
Motivation 8, cylinder 9, low pressure EGR tube 12, high pressure EGR tube 15, EGR pump 18, EGR gas rail 22, EGR nozzles 24, liquefaction gas bottle 25,
Gas pump 30, combustion gas rail 33 and gas nozzle 35.2 air inlet of compressor is connected with air inlet pipe 1,2 outlet of compressor
Mouth is connected by compressor escape pipe 5 with 6 import of air intake intercooler；The outlet of air intake intercooler 6 passes through inlet manifold 7
It is connected with engine 8.4 import of turbine is connected by exhaust main 10 with engine 8, turbine 4 outlet with
Exhaust pipe 11 is connected；It is connected by connecting shaft 3 between the compressor 2 and turbine 4.The low pressure EGR tube 12
Exhaust pipe 11 and high pressure EGR tube 15 are connected, low pressure EGR valve 13 is installed on low pressure EGR tube 12；It is equipped on high pressure EGR tube 15
High pressure EGR valve 14.The EGR pumps 18 imports and is connected with exhaust main 10 by high pressure EGR tube 15,18 outlet of EGR pumps and
22 import of EGR gas rail is connected.The outlet of EGR gas rail 22 is connected by EGR supply pipes 23 with EGR nozzles 24, described
EGR nozzles 24 be mounted in the air intake duct on cylinder 9 or close to cylinder 9；EGR nozzles 2 are arranged close to the air inlet of cylinder 9
Air intake duct direct-injection is realized in road, can get preferable response characteristic.The outlet of liquefaction gas bottle 25 and 30 import of gas pump
It is connected, the gas pump 30 outlet is connected with 33 import of combustion gas rail, and the combustion gas rail 33 outlet passes through fuel gas supply
Pipe 34 is connected with gas nozzle 35, and the gas nozzle 35 is mounted in the air intake duct on cylinder 9 or close to cylinder；It will combustion
Gas jets 35 are arranged close to realize air intake duct direct-injection in the air intake duct of cylinder 9, can get preferable response characteristic.
Further include having cooler 20 further, the cooler 20EGR imports pump out gas by EGR referring to Fig. 1
Pipe 19 is connected with 18 outlet of EGR pumps, and the outlets cooler 20EGR are connected by EGR gas rails connecting tube 21 with 22 import of EGR gas rail
It connects.20 fuel gas inlet of cooler is connected by gas pump escape pipe 31 with the outlet of gas pump 30,20 combustion gas of cooler
Outlet is connected by combustion gas rail connecting tube 32 with 33 import of combustion gas rail.
Further include having EGR filters 16 further referring to Fig. 1,16 import of EGR filters and high pressure EGR tube
15 are connected, and the outlet of EGR filters 16 pumps air inlet pipe 17 by EGR and is connected with EGR 18 imports of pump.
Further include having gas filter 28 further referring to Fig. 1, the gas filter 28 setting is fired in liquefaction
Between gas cylinder 25 and gas pump 30.28 import of gas filter is connected by gas header pipe 26 with the outlet of liquefaction gas bottle 25,
The outlet of gas filter 28 is connected by gas pump air inlet pipe 29 with 30 import of gas pump；It is arranged on the gas header pipe 26
There is gas pressure-reducing valve 27.
Referring to Fig. 1, the present invention establishes combustion gas and EGR common rail systems, using gas nozzle 35 and EGR nozzles 24 by combustion gas
It is directly injected in cylinder with EGR, that is, establishes the joint direct-injection system that inner cylinder direct injection exhaust gas and combustion gas may be implemented, be applicable in
In multi-cylinder pressurized combustion gases machine.When work, combustion gas and exhaust gas enter 33 He of combustion gas rail by gas pump 30 and 18 pressurization of EGR pumps respectively
EGR gas rail 22, and maintain certain pressure in respective gas rail；EGR nozzles 24 and gas nozzle 35 respectively with EGR gas rail 22
It is connected with combustion gas rail 33, the opening and closing by controlling gas nozzle 35 and EGR nozzles 24 control combustion gas and EGR enters in cylinder
Moment.Therefore, the present invention is by establishing 22 liang of set gas rails of combustion gas rail 33 and EGR gas rail, according to burning in cylinder 9 to EGR amount
Demand, and combustion gas and EGR are injected directly into cylinder 9 respectively by EGR nozzles 24 and gas nozzle 35, realizing will combustion
Gas and EGR are accurately quickly sprayed into cylinder and are participated in fire emission control, realize the quick response of combustion gas and EGR, avoid because into
Combustion gas and EGR distribute the problems such as uneven, the combustion gas for eliminating existing egr system and EGR and ring between each cylinder caused by gas mixing is uneven
Lag issues are answered, solve the problems such as operating lag of EGR under transient condition, realize EGR systems under transient condition
It accurately controls, ensure that engine 8 has preferably performance and emission effect.
Referring to Fig. 1, the fuel gas injection of gas engine is combined by the present invention with EGR jet modes, avoids individual combustion gas
With EGR direct-injection modes, the arrangement space in cylinder 9 can be effectively saved；Meanwhile combustion gas passes through cooler with EGR in the present invention
20 exchange heat, and are cooled down to high temperature EGR using low temperature combustion gas cold, reduce to engine coolant demand, meet low
Warm gas heating and high temperature EGR cooling requirements, and low temperature combustion gas simultaneously is more preferable to the cooling effect of EGR.
Referring to Fig. 1, meanwhile, mesohigh EGR pipe 15 of the present invention and low pressure EGR tube 12 are connected with EGR pumps 18, high pressure EGR valve
14 and low pressure EGR valve 13 be separately mounted on high pressure EGR tube 15 and low pressure EGR tube 12；Establish two kinds of EGR of high pressure and low pressure
Circuit, the opening and closing by controlling high pressure EGR valve 14 and low pressure EGR valve 13 control EGR pumping gas modes, and realization flexibly takes
Gas strategy.
Therefore, the present invention is accurately controlled according to demand of the burning to combustion gas and EGR amount in cylinder 9 by mixture gas nozzle 25
Combustion gas processed and EGR spray into air-fuel mixture amount and gaseous mixture in cylinder and enter the moment in cylinder 9, and the combustion gas of required ratio and EGR is accurate
Quickly spray into cylinder 9 and participate in fire emission control, realize quickly accurately controlling to combustion gas and EGR, avoid because into
The EGR response lags that combustion gas and EGR distribute the problems such as uneven, eliminate existing egr system between each cylinder caused by gas mixing is uneven
Problem solves the problems such as operating lag of EGR under transient condition, realizes the accurate control of EGR systems under transient condition
System, ensure that engine 8 has preferably performance and emission effect.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
The specific implementation of the present invention is confined to these explanations.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, and above structure all shall be regarded as belonging to
Protection scope of the present invention.
Claims (3)
1. a kind of combustion gas and EGR combine direct-injection system, including compressor（2）, turbine（4）, air intake intercooler（6）, engine
（8）, cylinder（9）, low pressure EGR tube（12）, the compressor（2）Air inlet and air inlet pipe（1）It is connected, compressor（2）Go out
Gas port passes through compressor escape pipe（5）With air intake intercooler（6）Import is connected, the air intake intercooler（6）Outlet passes through
Inlet manifold（7）With engine（8）It is connected, the turbine（4）Import passes through exhaust main（10）With engine（8）Phase
Connection, turbine（4）Outlet and exhaust pipe（11）It is connected, the compressor（2）With turbine（4）Between pass through connecting shaft
（3）It is connected, it is characterised in that：Further include having high pressure EGR tube（15）, EGR pump（18）, EGR gas rails（22）, EGR nozzles（24）、
Liquefaction gas bottle（25）, gas pump（30）, combustion gas rail（33）And gas nozzle（35）, the low pressure EGR tube（12）Connection row
Tracheae（11）And high pressure EGR tube（15）, low pressure EGR tube（12）On low pressure EGR valve is installed（13）, high pressure EGR tube（15）Upper peace
Equipped with high pressure EGR valve（14）, the described EGR pumps（18）Import passes through high pressure EGR tube（15）With exhaust main（10）It is connected,
EGR is pumped（18）Outlet and EGR gas rails（22）Import is connected, the EGR gas rails（22）Outlet passes through EGR supply pipes（23）With
EGR nozzles（24）It is connected, the EGR nozzles（24）Mounted on cylinder（9）Upper or close cylinder（9）Air intake duct in, institute
The liquefaction gas bottle stated（25）Outlet and gas pump（30）Import is connected, the gas pump（30）Outlet and combustion gas rail（33）
Import is connected, the combustion gas rail（33）Outlet passes through gas supply pipe（34）With gas nozzle（35）It is connected, it is described
Gas nozzle（35）Mounted on cylinder（9）Upper or close cylinder（9）Air intake duct in, further include having cooler（20）, described
Cooler（20）EGR inlet pumps out tracheae by EGR（19）It is pumped with EGR（18）Outlet is connected, cooler（20）EGR outlet is logical
Cross EGR gas rail connecting tubes（21）With EGR gas rails（22）Import is connected, the cooler（20）Fuel gas inlet passes through gas pump
Escape pipe（31）With gas pump（30）Outlet is connected, cooler（20）Gas outlet passes through combustion gas rail connecting tube（32）With combustion gas
Rail（33）Import is connected.
2. a kind of combustion gas according to claim 1 and EGR combine direct-injection system, it is characterised in that：Further include having EGR filterings
Device（16）, the EGR filters（16）Import and high pressure EGR tube（15）It is connected, EGR filters（16）Outlet passes through EGR
Pump air inlet pipe（17）It is pumped with EGR（18）Import is connected.
3. a kind of combustion gas according to claim 1 and EGR combine direct-injection system, it is characterised in that：Further include having combustion gas
Filter（28）, the gas filter（28）It is arranged in liquefaction gas bottle（25）And gas pump（30）Between, gas filter
（28）Import passes through gas header pipe（26）With liquefaction gas bottle（25）Outlet is connected, gas filter（28）Outlet passes through combustion gas
Pump air inlet pipe（29）With gas pump（30）Import is connected, the gas header pipe（26）On be provided with gas pressure-reducing valve（27）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610081619.9A CN105545557B (en) | 2016-02-05 | 2016-02-05 | Gas and EGR (exhaust gas recirculation) combined direct injection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610081619.9A CN105545557B (en) | 2016-02-05 | 2016-02-05 | Gas and EGR (exhaust gas recirculation) combined direct injection system |
Publications (2)
| Publication Number | Publication Date |
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| CN105545557A CN105545557A (en) | 2016-05-04 |
| CN105545557B true CN105545557B (en) | 2018-08-07 |
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