CN205532931U - EGR system suitable for dual -fuel engine - Google Patents
EGR system suitable for dual -fuel engine Download PDFInfo
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- CN205532931U CN205532931U CN201620035840.6U CN201620035840U CN205532931U CN 205532931 U CN205532931 U CN 205532931U CN 201620035840 U CN201620035840 U CN 201620035840U CN 205532931 U CN205532931 U CN 205532931U
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Abstract
The utility model discloses a EGR system suitable for dual -fuel engine overcomes THC and NOx and discharges high problem, and the EGR system includes turbo charger, EGR control piper, EGR three -way valve, air inlet pipeline and natural gas supply pipeline, the import and the EGR control piper of EGR three -way valve are connected, and the other end and the blast pipe of dual -fuel engine body of EGR control piper are connected, no. 1 export and " EGR+ air " tube coupling of EGR three -way valve, the other end of " EGR+ air " pipeline is connected with " EGR+ air " blender of air inlet pipeline, no. 2 exports of EGR three -way valve are connected with " the EGR+ natural gas ", and the other end and the natural gas supply pipeline of " the EGR+ natural gas " pipeline are connected, and the other end of natural gas supply pipeline is connected with the air inlet pipeline, and the other end of air inlet pipeline is connected with turbo charger's compressor, turbo charger's turbine and this body coupling of dual -fuel engine.
Description
Technical field
This utility model relates to a kind of gas recirculation system (Exhaust Gas Recirculation, ERG) of electromotor, more precisely, this utility model relates to a kind of egr system being applicable to diesel/natural gas dual-fuel engine.
Background technology
Along with energy crisis, environmental pollution day by day serious, natural gas becomes the most promising engine replacing fuel.Large diesel engine is possible not only to effective alleviating energy crisis after being adapted as diesel/natural gas dual-fuel engine, moreover it is possible to be substantially reduced soot emissions, to meet the Abgasgesetz of increasingly stringent.EGR Technology is to reduce the simple and effective approach of one that engine NOx (nitrogen oxide:NOx) discharges, a certain amount of waste gas is reintroduced in cylinder in some way, reduce oxygen concentration, increase specific heat ratio, thus reduce the maximum combustion temperature of combustion process, the generation of suppression NOx.
At present, egr system that heavy-duty diesel oil/natural gas double fuel engine uses or the egr system of former diesel engine, i.e. electromotor recirculating exhaust gas through supercooling laggard enter inlet manifold, after being sufficiently mixed with fresh air together with enter cylinder.But, this egr system applies one problem the biggest of existence on dual fuel engine.In diesel/natural gas dual-fuel engine, although natural gas is usually intake port injection, but natural gas is not to be uniformly distributed completely in cylinder, there is lamination.Thus causing the region that natural gas is few, air is the most, and the waste gas again participating in burning is the most more；And the region that natural gas is many, air is relatively fewer, and the waste gas again participating in burning is the most less.Thus it is relatively big to cause the less place of natural gas to be affected by recirculating exhaust gas, burning deteriorates, and the most hydrocarbon (total hydrocarbon, THC) discharges rising；The more place of natural gas is affected less by recirculating exhaust gas, and NOx emission is higher.
Summary of the invention
Deteriorate in diluter zonal combustion when technical problem to be solved in the utility model is to overcome diesel/natural gas dual-fuel engine recirculating exhaust gas to mix uneven with natural gas, THC discharges high and high in denseer zonal combustion temperature, NOx emission is high problem, it is provided that a kind of egr system being applicable to dual fuel engine.
For solving above-mentioned technical problem, this utility model adopts the following technical scheme that realization: described a kind of egr system being applicable to dual fuel engine includes turbocharger, " EGR+ natural gas " pipeline, " EGR+ air " pipeline, EGR control piper, EGR three-way valve, air inlet pipeline and natural gas feeding pipe.
Described EGR control piper includes that EGR controls main valve and EGR charge air cooler；
Described " EGR+ air " pipeline includes No. 1 EGR valve and No. 1 EGR check valve；
Described " EGR+ natural gas " pipeline includes No. 2 EGR valve, EGR filter, EGR supercharger, No. 2 EGR check valves；
Described air inlet pipeline includes intercooler, " EGR+ air " blender, inlet manifold, air intake duct；
Described natural gas feeding pipe includes " EGR+ natural gas " blender, natural gas gas rail, natural gas nozzle；
The outlet side pipeline that the EGR three-way valve import of described EGR three-way valve controls main valve with EGR is connected, and uses pipeline to be connected between the import of EGR charge air cooler with the exhaust main in dual fuel engine body；The EGR three-way valve of EGR three-way valve 1 outlet uses pipeline to be connected with the inlet end of No. 1 EGR valve, and the outlet side of No. 1 EGR check valve uses pipeline to be connected with the blender i.e. exhaust gas inlet end of No. 1 import of " EGR+ air " blender；The EGR three-way valve of EGR three-way valve 2 outlet uses pipeline to be connected with the inlet end of No. 2 EGR valve, and the outlet side of No. 2 EGR check valves uses pipeline to be connected with the exhaust gas inlet end of " EGR+ natural gas " blender, and the outlet side of natural gas nozzle loads in air intake duct；The import of intercooler uses pipeline to be connected with the gas outlet of the compressor of turbocharger, one end of air intake duct uses pipeline to be connected with dual fuel engine body, and the air inlet of the turbine in turbocharger uses pipeline to be connected with the exhaust main in dual fuel engine body.
The outlet of inlet end and EGR charge air cooler that the EGR described in technical scheme controls main valve uses pipeline to be connected.
The port of export of described in technical scheme No. 1 EGR valve and the inlet end of No. 1 EGR check valve use pipeline to connect.
" EGR+ natural gas " pipeline described in technical scheme also includes EGR supercharger, EGR filter；The outlet side of No. 2 described EGR valve uses pipeline to be connected with the import of EGR filter, and the outlet of EGR filter uses pipeline to be connected with the import of EGR supercharger, and the outlet of EGR supercharger uses pipeline to be connected with the inlet end of No. 2 EGR check valves.
Air inlet pipeline described in technical scheme also includes inlet manifold；The outlet of described intercooler uses pipeline to be connected with the blender i.e. air intlet end of No. 2 imports of " EGR+ air " blender, " EGR+ air " mixer outlet of blender is connected with one end of inlet manifold, and the other end of inlet manifold is connected with one end of air intake duct.
Natural gas feeding pipe described in technical scheme also includes the natural gas nozzle that 6 structures are identical；The port of export of described " EGR+ natural gas " blender is connected with the import of natural gas gas rail by pipeline, the inlet end of the natural gas nozzle that on natural gas gas rail 6 outlets are identical with 6 structures respectively connects, and the outlet side of the natural gas nozzle that 6 structures are identical is inserted in the air intake duct in air pipe.
EGR three-way valve described in technical scheme is the flow divider of a three way type, has three openings, i.e. one EGR three-way valve import and EGR three-way valve 1 outlet, EGR three-way valve 2 outlet；External screw thread it is machined with respectively with the opening of EGR three-way valve 2 outlet in EGR three-way valve import, EGR three-way valve 1 outlet, the axis of rotation conllinear that EGR three-way valve 1 outlet exports with EGR three-way valve 2, EGR three-way valve import is between EGR three-way valve 1 outlet and EGR three-way valve 2 outlet, and the axis of rotation of EGR three-way valve import is vertical with the axis of rotation of EGR three-way valve 1 outlet or EGR three-way valve 2 outlet.
" EGR+ air " blender described in technical scheme and " EGR+ natural gas " blender are a kind of completely identical in structure mixing arrangements.Described " EGR+ air " blender includes blender support and blender base.Blender support is made up of with Support Channel bracket fixing plate, support toroidal shell, the center of bracket fixing plate is provided with central passage hole, it is provided with 4 identical bolts hole of structure the most equably, a radial direction through hole it is disposed radially on support circular casing body wall, the internal diameter in the diameter of radial direction through hole and the aperture in central passage hole of bracket fixing plate, Support Channel is equal, and the support circular casing body wall of radial direction through hole both sides is evenly arranged with EGR throttle orifice；Radial direction through hole, EGR throttle orifice connect with the endoporus of support toroidal shell, and bracket fixing plate, Support Channel are sequentially connected with integral with support toroidal shell, the centre of gyration line conllinear of central passage hole, Support Channel and radial direction through hole；Blender base is a cuboid formula structural member, the center of blender base arranges a vertical central blind hole vertically, vertically the evenly distributed around of central blind hole has 4 bolts hole, one horizontal through hole is flatly set on blender base, one end of horizontal through hole is No. 2 imports of blender, the other end of horizontal through hole is mixer outlet, vertically central blind hole is connected with horizontal through hole, vertically central blind hole intersects vertically with the axis of rotation of horizontal through hole, vertically central blind hole and horizontal through hole equal diameters, and than support toroidal shell external diameter big 1～2mm；Support toroidal shell below blender support loads in the horizontal through hole on blender base, and both are bolted to connection, the support toroidal shell below blender support and No. 2 imports of blender or mixer outlet axis of rotation conllinear.
Compared with prior art the beneficial effects of the utility model are:
A kind of egr system being applicable to dual fuel engine the most described in the utility model can realize recirculating exhaust gas and be sufficiently mixed with air inlet.
A kind of egr system being applicable to dual fuel engine the most described in the utility model can realize recirculating exhaust gas and be sufficiently mixed with natural gas.
A kind of egr system being applicable to dual fuel engine the most described in the utility model can realize recirculating exhaust gas and mix with air and natural gas arbitrary proportion.
A kind of egr system being applicable to dual fuel engine the most described in the utility model can realize the noble gas of recirculating exhaust gas and the dual fuel engine diluted with noble gas after simple modification and be sufficiently mixed.
A kind of egr system being applicable to dual fuel engine the most described in the utility model is not limited only to diesel/natural gas dual-fuel engine, applies also for the Ignition Natural Gas Engine of intake port injection and uses the dual fuel engine of other fuel.
A kind of egr system being applicable to dual fuel engine the most described in the utility model can be that in probing into dual fuel engine difference cylinder, EGR distribution provides technical support to the impact of engine performance.
Accompanying drawing explanation
Below in conjunction with the accompanying drawings this utility model is further described:
Fig. 1 is the schematic diagram of a kind of egr system structural principle being applicable to dual fuel engine described in the utility model；
Fig. 2 is the axonometric projection graph of the structure composition of the EGR three-way valve employed in a kind of egr system being applicable to dual fuel engine described in the utility model；
Fig. 3 is the axonometric projection graph of " EGR+ air " the blender supporting structure employed in a kind of egr system being applicable to dual fuel engine described in the utility model；
Fig. 4 is the axonometric projection graph of " EGR+ air " the blender understructure employed in a kind of egr system being applicable to dual fuel engine described in the utility model；
nullIn figure: 1. dual fuel engine body，2. exhaust branch pipe，3. exhaust main，4. No. 1 EGR valve，5. compressor，6. turbocharger，7 turbines，8. No. 1 EGR check valve，9. intercooler，10. " EGR+ air " blender，11. inlet manifolds，12. air intake ducts，13. natural gas gas rails，14. natural gas nozzles，15.EGR charge air cooler，16. No. 2 EGR check valves，17. " EGR+ natural gas " blender，18.EGR supercharger，19.EGR filter，20. No. 2 EGR valve，21. " EGR+ natural gas " pipeline，22.EGR controls main valve，23. " EGR+ air " pipeline，24.EGR control piper，25. gas exhaust pipings,26.EGR three-way valve，27. air inlet pipelines，28. natural gas feeding pipes，29.EGR three-way valve import，30.EGR three-way valve 1 outlet，31.EGR three-way valve 2 outlet，32. blender 1 imports，33. bolts hole，34.EGR throttle orifice，35. blender 2 imports，36. mixer outlets，37. blender supports，38. blender bases，A. fresh air，B. natural gas.
Detailed description of the invention
Below in conjunction with the accompanying drawings this utility model is explained in detail:
Refering to Fig. 1, a kind of egr system being applicable to dual fuel engine includes EGR control piper 24, " EGR+ air " pipeline 23, " EGR+ natural gas " pipeline 21, air inlet pipeline 27, natural gas feeding pipe 28, EGR three-way valve 26 and turbocharger 6.
Being provided with two outlets on the exhaust main 3 of dual fuel engine body 1, an outlet is connected with the import of one end i.e. EGR charge air cooler 15 of the EGR control piper 24 providing recirculating exhaust gas.Another outlet is connected by the air inlet of gas exhaust piping 25 with the turbine 5 in turbocharger 6；The gas outlet of the compressor 7 in turbocharger 6 is connected with dual fuel engine body 1 by air inlet pipeline 27.
Described air inlet pipeline 27 is between compressor 7 and dual fuel engine body 1, including intercooler 9, " EGR+ air " blender 10, inlet manifold 11 and air intake duct 12.Fresh air A enters the air inlet of compressor 7, the gas outlet of compressor 7 is connected with the import of intercooler 9 by pipeline, the outlet of intercooler 9 and No. 2 imports 35 of blender of described " EGR+ air " blender 10, i.e. air intlet end pipeline connects, the mixer outlet 36 of " EGR+ air " blender 10 is connected with one end of described inlet manifold 11, the other end of inlet manifold 11 is connected with one end of described air intake duct 12, and the other end of air intake duct 12 is connected with dual fuel engine body 1.
Described EGR control piper 24 includes that EGR charge air cooler 15 and EGR controls main valve 22, and the inlet end of EGR control main valve 22 is connected with the export pipeline of EGR charge air cooler 15.And the outlet side that EGR controls main valve 22 is connected with the EGR three-way valve import 29 of EGR three-way valve 26.The EGR three-way valve of EGR three-way valve 26 1 outlet 30 and EGR three-way valve 2 outlet 31 is connected with one end of " EGR+ air " pipeline 23 and one end of " EGR+ natural gas " pipeline 21 respectively.
Described " EGR+ air " pipeline 23 includes No. 1 EGR valve 4 and No. 1 EGR check valve 8.The inlet end of No. 1 EGR valve 4 exports 30 by pipeline with the EGR three-way valve 1 of EGR three-way valve 26 and is connected, the outlet side of No. 1 EGR valve 4 is connected by pipeline with the inlet end of No. 1 EGR check valve 8, and the outlet side of No. 1 EGR check valve is connected with the blender i.e. exhaust gas inlet end pipeline of No. 1 import 32 of " EGR+ air " blender 10 in air inlet pipeline 27.
Described " EGR+ natural gas " pipeline 21 includes No. 2 EGR valve 20, EGR filter 19,18, No. 2 EGR check valves 16 of EGR supercharger.The inlet end of No. 2 EGR valve 20 exports 31 by pipeline with the EGR three-way valve 2 of EGR three-way valve 26 and is connected, the outlet side of No. 2 EGR valve 20 is connected by pipeline with the import of EGR filter 19, the outlet of EGR filter 19 is connected by pipeline with the import of EGR supercharger 18, the outlet of EGR supercharger 18 is connected with the inlet end pipeline of No. 2 EGR check valves 16, and the outlet side of No. 2 EGR check valves 16 is connected with the gas inlet end of " EGR+ natural gas " blender 17 in natural gas feeding pipe 28.
The natural gas nozzle 14 that described natural gas feeding pipe 28 includes " EGR+ natural gas " blender 17, natural gas gas rail 13 is identical with 6 structures, it is possible to accurately control the time for spraying of natural gas, expulsion pressure and injection pulse width.The port of export of " EGR+ natural gas " blender 17 is connected with the import of natural gas gas rail 13 by pipeline, natural gas gas rail 13 is provided with 6 identical natural gas nozzles 14 of structure, and natural gas gas rail 13 is connected with the inlet end of natural gas nozzle 14, the outlet side of natural gas nozzle 14 i.e. spray orifice aligns with the air intake duct 12 in dual fuel engine body 1, natural gas injection in air intake duct 12.
Refering to Fig. 2, described EGR three-way valve 26 is the flow divider of a three way type, has three openings, i.e. EGR three-way valve import 29, EGR three-way valve 1 outlet 30 and EGR three-way valve 2 outlet 31；External screw thread it is machined with respectively with the opening of EGR three-way valve 2 outlet 31 in EGR three-way valve import 29, EGR three-way valve 1 outlet 30, EGR three-way valve 1 outlet 30 and EGR three-way valve 2 export the axis of rotation conllinear of 31, EGR three-way valve import 29 is between EGR three-way valve 1 outlet 30 and EGR three-way valve 2 outlet 31, and the axis of rotation of EGR three-way valve import 29 is vertical with the axis of rotation of EGR three-way valve 1 outlet 30 or EGR three-way valve 2 outlet 31.
Refering to Fig. 3 and Fig. 4, described " EGR+ air " blender 10 and " EGR+ natural gas " blender 17 are a kind of mixing arrangements, and the two structure is identical.Blender has three openings, i.e. two imports and an outlet, and an import is the entrance point of air or natural gas, and another import is through port of export outflow after the entrance point of recirculating exhaust gas, air or natural gas and waste gas mix homogeneously." EGR+ air " blender 10 is made up of blender support 37 and blender base 38, support toroidal shell below blender support 37 loads among No. 2 imports of blender 35 and the mixer outlet 36 of blender base 38, both are bolted to connection, it is ensured that the support toroidal shell below blender support 37 and No. 2 imports 35 of blender or mixer outlet 36 axis of rotation conllinear.
Blender support 37 is made up of with Support Channel bracket fixing plate, support toroidal shell, the center of bracket fixing plate is provided with central passage hole, it is provided with 4 identical bolts hole of structure about, a radial direction through hole it is disposed radially on support circular casing body wall, the internal diameter in the diameter of radial direction through hole and the aperture in central passage hole of bracket fixing plate, Support Channel is equal, and the support circular casing body wall of radial direction through hole both sides is evenly arranged with 18 EGR throttle orifices 34；Radial direction through hole connects with the endoporus of EGR throttle orifice 34 and support toroidal shell.
Blender base 38 is a cuboid formula structural member, in the center of blender base 38 top end face, one vertical central blind hole is set vertically, vertically the evenly distributed around of central blind hole has 4 bolts hole, one horizontal through hole is flatly set on blender base 38, one end of horizontal through hole is No. 2 imports 35 of blender, the other end of horizontal through hole is mixer outlet 36, vertically central blind hole is connected with horizontal through hole, vertically central blind hole intersects vertically with the axis of rotation of horizontal through hole, vertically central blind hole and horizontal through hole equal diameters, and than the support toroidal shell external diameter big 1～2mm in blender support 37.
Described EGR supercharger 18 is that a kind of motor drives centrifugal-flow compressor, is made up of motor, housing and blade.Motor-driven blade rotates compression recirculating exhaust gas, and the waste gas after supercharging enters the inlet end of No. 2 EGR check valves 16 through EGR supercharger outlet.It is LX-3971 that this utility model is suitable for effect preferable EGR supercharger model.
The outlet side pipeline that the EGR three-way valve import 29 of described EGR three-way valve 26 controls main valve 22 with EGR in EGR control piper 24 is connected, and in EGR control piper 24, the import of EGR charge air cooler 15 is connected with 1 export pipeline arranged on the exhaust main 3 in dual fuel engine body 1；The EGR three-way valve of described EGR three-way valve 26 1 outlet 30 is connected with the inlet end pipeline of No. 1 EGR valve 4 in " EGR+ air " pipeline 23, and the outlet side of No. 1 EGR check valve 8 in " EGR+ air " pipeline 23 is connected with the blender i.e. exhaust gas inlet end pipeline of No. 1 import 32 of " EGR+ air " blender 10 in air inlet pipeline 27；The EGR three-way valve of described EGR three-way valve 26 2 outlet 31 is connected with the inlet end pipeline of No. 2 EGR valve 20 in " EGR+ natural gas " pipeline 21, the outlet side of No. 2 EGR check valves 16 in " EGR+ natural gas " pipeline 21 is connected with the gas inlet end of " EGR+ natural gas " blender 17 in natural gas feeding pipe 28, and the outlet side of the natural gas nozzle 14 in natural gas feeding pipe 28 aligns with the air intake duct 12 in air inlet pipeline 27；The import of the intercooler 9 in air inlet pipeline 27 is connected with the gas outlet pipeline of the compressor 7 of turbocharger 6, one end of air intake duct 12 in air inlet pipeline 27 is connected with dual fuel engine body 1 pipeline, and the air inlet of the turbine 5 in turbocharger 6 is connected with exhaust main 3 pipeline in dual fuel engine body 1.
A kind of EGR be applicable to the egr system of dual fuel engine described in the utility model controls 22, No. 1 EGR valve 4 of main valve and No. 2 EGR valve 20 use electrodynamic type EGR valve, control EGR control piper 24, " EGR+ air " pipeline 23 and the opening and closing of " EGR+ natural gas " pipeline 21 respectively, it is also possible to accurately control participates in the quantity of the recirculating exhaust gas burnt again.In this utility model, the model of electrodynamic type EGR valve is SBZB1N-0013, is made up of drive mechanism and actuator two large divisions.Drive mechanism mainly includes a motor, is connected with the control unit of electromotor, and according to the instruction works of control unit.Performance element includes a valve body, and valve body is connected with motor, and i.e. valve body is by step motor drive, by the open and-shut mode of the motor control pipeline of valve body.
When electromotor 1 need not EGR, EGR controls main valve 22 and closes.
When electromotor 1 runs with pure diesel fuel mode, EGR controls main valve 22 and No. 1 EGR valve 4 is opened, and No. 2 EGR valve 20 are closed；
When electromotor 1 runs with dual fuel mode, EGR controls main valve 22 and No. 2 EGR valve 20 are opened, and No. 1 EGR valve 4 is closed；
When needing again to participate in the waste gas of burning, air is when all mixing with natural gas, and EGR control 22, No. 1 EGR valve 4 of main valve and No. 2 EGR valve 20 are all opened.
A kind of " EGR+ natural gas " blender 17 be applicable to the egr system of dual fuel engine described in the utility model is respectively used to ensure that waste gas, natural gas and air uniformly mix with " EGR+ air " blender 10, and then ensures to enter the uniformity of the recirculating exhaust gas of each cylinder；The impurity such as the EGR filter 19 arranged in native system soot in scavenging, prevent from blocking natural gas nozzle；The EGR supercharger 18 arranged in native system is used for improving exhaust gas pressure, to eliminate the pressure differential between recirculating exhaust gas and natural gas, and then realizes both be sufficiently mixed；The EGR charge air cooler 15 arranged in native system and intercooler 9 are respectively used to cooling for reflux waste gas and fresh air, improve the intake efficiency of electromotor；Finally, native system is additionally provided with No. 1 EGR check valve 8 and No. 2 EGR check valves 16, is respectively used to prevent air and natural gas from flowing backwards.
Refering to Fig. 1, the arrow in accompanying drawing represents a kind of flow direction of waste gas, air and natural gas be applicable to the egr system of dual fuel engine described in the utility model respectively, and A represents that fresh air, B represent natural gas.The waste gas that each cylinder combustion of dual fuel engine body 1 produces enters exhaust main 3 through exhaust branch pipe 2, most of waste gas in exhaust main 3 is discharged after turbine 5 acting that gas exhaust piping 25 promotes turbocharger 6, the compressor 7 coaxial with turbine 5 enters intercooler 9 after being compressed by fresh air A, through supercooling laggard enter " EGR+ air " blender 10, and sequentially pass through inlet manifold 11 after being sufficiently mixed with the recirculating exhaust gas in " EGR+ air " pipeline 23, air intake duct 12 enters in the cylinder of dual fuel engine body 1；Additionally, exhaust main 3 at dual fuel engine body 1 is provided with the EGR control piper 24 providing EGR, again the waste gas participating in burning is divided into two-way after exhaust main 3, EGR charge air cooler 15 and EGR control main valve 22, one road flows to " EGR+ air " pipeline 23, and an other road flows to " EGR+ natural gas " pipeline 21.Air after " EGR+ air " blender 10, with charge inter cooling that waste gas in " EGR+ air " pipeline 23 sequentially passes through No. 1 EGR valve 4 and No. 1 EGR check valve 8 flows in air inlet pipeline 27 be sufficiently mixed after in inlet manifold 11 and air intake duct 12 enter the cylinder of dual fuel engine body 1；Waste gas in " EGR+ natural gas " pipeline 21 sequentially passes through " EGR+ natural gas " blender 17 that No. 2 EGR valve 20, EGR filter 19, EGR supercharger 18 and No. 2 EGR check valves 16 enter in natural gas feeding pipe 28, spray into engine inlets 12 through natural gas gas rail 13 and natural gas nozzle 14 after being sufficiently mixed with natural gas B, in entering the cylinder of dual fuel engine body 1 together with air, participate in burning.
Claims (8)
1. the egr system being applicable to dual fuel engine, it is characterized in that, described a kind of egr system being applicable to dual fuel engine includes turbocharger (6), " EGR+ natural gas " pipeline (21), " EGR+ air " pipeline (23), EGR control piper (24), EGR three-way valve (26), air inlet pipeline (27) and natural gas feeding pipe (28)；
Described EGR control piper (24) includes that EGR controls main valve (22) and EGR charge air cooler (15)；
Described " EGR+ air " pipeline (23) include No. 1 EGR valve (4) and No. 1 EGR check valve (8)；
Described " EGR+ natural gas " pipeline (21) include No. 2 EGR valve (20), EGR filter (19), EGR supercharger (18), No. 2 EGR check valves (16)；
Described air inlet pipeline (27) includes intercooler (9), " EGR+ air " blender (10), inlet manifold (11), air intake duct (12)；
Described natural gas feeding pipe (28) includes " EGR+ natural gas " blender (17), natural gas gas rail (13), natural gas nozzle (14)；
EGR three-way valve import (29) and the EGR of described EGR three-way valve (26) controls the outlet side pipeline of main valve (22) and is connected, and uses pipeline to be connected between the import of EGR charge air cooler (15) and the exhaust main (3) in dual fuel engine body (1)；The EGR three-way valve of EGR three-way valve (26) 1 outlet (30) uses pipeline to be connected with the inlet end of No. 1 EGR valve (4), and the outlet side of No. 1 EGR check valve (8) uses pipeline to be connected with No. 1 import (32) the i.e. exhaust gas inlet end of blender of " EGR+ air " blender (10)；The EGR three-way valve of EGR three-way valve (26) 2 outlet (31) uses pipeline to be connected with the inlet end of No. 2 EGR valve (20), the outlet side of No. 2 EGR check valves (16) uses pipeline to be connected with the exhaust gas inlet end of " EGR+ natural gas " blender (17), and the outlet side of natural gas nozzle (14) loads in air intake duct (12)；The import of intercooler (9) uses pipeline to be connected with the gas outlet of the compressor (7) of turbocharger (6), one end of air intake duct (12) uses pipeline to be connected with dual fuel engine body (1), and the air inlet of the turbine (5) in turbocharger (6) uses pipeline to be connected with the exhaust main (3) in dual fuel engine body (1).
2. according to a kind of egr system being applicable to dual fuel engine described in claim 1, it is characterised in that the outlet of inlet end and EGR charge air cooler (15) that described EGR controls main valve (22) uses pipeline to be connected.
3. according to a kind of egr system being applicable to dual fuel engine described in claim 1, it is characterised in that the port of export of No. 1 described EGR valve (4) and the inlet end of No. 1 EGR check valve (8) use pipeline to connect.
4. according to a kind of egr system being applicable to dual fuel engine described in claim 1, it is characterised in that described " EGR+ natural gas " pipeline (21) also include EGR supercharger (18), EGR filter (19)；
The outlet side of No. 2 described EGR valve (20) uses pipeline to be connected with the import of EGR filter (19), the outlet of EGR filter (19) uses pipeline to be connected with the import of EGR supercharger (18), and the outlet of EGR supercharger (18) uses pipeline to be connected with the inlet end of No. 2 EGR check valves (16).
5. according to a kind of egr system being applicable to dual fuel engine described in claim 1, it is characterised in that described air inlet pipeline (27) also includes inlet manifold (11)；
No. 2 import (35) i.e. air intlet ends of the outlet of described intercooler (9) and the blender of " EGR+ air " blender (10) use pipeline to be connected, the mixer outlet (36) of " EGR+ air " blender (10) is connected with one end of inlet manifold (11), and the other end of inlet manifold (11) is connected with one end of air intake duct (12).
6. according to a kind of egr system being applicable to dual fuel engine described in claim 1, it is characterised in that described natural gas feeding pipe (28) also includes the natural gas nozzle (14) that 6 structures are identical；
The port of export of described " EGR+ natural gas " blender (17) is connected with the import of natural gas gas rail (13) by pipeline, the inlet end of the natural gas nozzle (14) that on natural gas gas rail (13) 6 outlets are identical with 6 structures respectively connects, and the outlet side of the natural gas nozzle (14) that 6 structures are identical is inserted in the air intake duct (12) in air pipe (27).
7. according to a kind of egr system being applicable to dual fuel engine described in claim 1, it is characterized in that, described EGR three-way valve (26) is the flow divider of a three way type, there are three openings, i.e. one EGR three-way valve import (29) and EGR three-way valve 1 outlet (30), EGR three-way valve 2 outlet (31)；External screw thread it is machined with respectively with the opening of EGR three-way valve 2 outlet (31) at EGR three-way valve import (29), EGR three-way valve 1 outlet (30), EGR three-way valve 1 outlet (30) and the axis of rotation conllinear of EGR three-way valve 2 outlet (31), EGR three-way valve import (29) is positioned between EGR three-way valve 1 outlet (30) and EGR three-way valve 2 outlet (31), and the axis of rotation of EGR three-way valve import (29) is vertical with the axis of rotation of EGR three-way valve 1 outlet (30) or EGR three-way valve 2 outlet (31).
8. according to a kind of egr system being applicable to dual fuel engine described in claim 1, it is characterized in that, described " EGR+ air " blender (10) and " EGR+ natural gas " blender (17) are a kind of completely identical in structure mixing arrangements；
Described " EGR+ air " blender (10) include blender support (37) and blender base (38)；
Blender support (37) is made up of with Support Channel bracket fixing plate, support toroidal shell, the center of bracket fixing plate is provided with central passage hole, it is provided with 4 identical bolts hole of structure the most equably, a radial direction through hole it is disposed radially on support circular casing body wall, the internal diameter in the diameter of radial direction through hole and the aperture in central passage hole of bracket fixing plate, Support Channel is equal, and the support circular casing body wall of radial direction through hole both sides is evenly arranged with EGR throttle orifice (34)；Radial direction through hole, EGR throttle orifice (34) connect with the endoporus of support toroidal shell, and bracket fixing plate, Support Channel are sequentially connected with integral with support toroidal shell, the centre of gyration line conllinear of central passage hole, Support Channel and radial direction through hole；
Blender base (38) is a square formula structural member, the center of blender base (38) arranges a vertical central blind hole vertically, vertically the evenly distributed around of central blind hole has 4 bolts hole, blender base flatly arranges a horizontal through hole on (38), one end of horizontal through hole is No. 2 imports (35) of blender, the other end of horizontal through hole is mixer outlet (36), vertically central blind hole is connected with horizontal through hole, vertically central blind hole intersects vertically with the axis of rotation of horizontal through hole, vertically central blind hole and horizontal through hole equal diameters, and than support toroidal shell external diameter big 1～2mm；
The support toroidal shell of blender support (37) lower section loads in the horizontal through hole on blender base (38), both are bolted to connection, the support toroidal shell of blender support (37) lower section and No. 2 imports (35) of blender or mixer outlet (36) axis of rotation conllinear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620035840.6U CN205532931U (en) | 2016-01-15 | 2016-01-15 | EGR system suitable for dual -fuel engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620035840.6U CN205532931U (en) | 2016-01-15 | 2016-01-15 | EGR system suitable for dual -fuel engine |
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| CN205532931U true CN205532931U (en) | 2016-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620035840.6U Withdrawn - After Issue CN205532931U (en) | 2016-01-15 | 2016-01-15 | EGR system suitable for dual -fuel engine |
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| CN (1) | CN205532931U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105464847A (en) * | 2016-01-15 | 2016-04-06 | 吉林大学 | EGR system suitable for dual-fuel engine |
| CN109441599A (en) * | 2018-11-20 | 2019-03-08 | 汽解放汽车有限公司 | A kind of device and method adjusting exhaust gas shunt volume |
| CN117418969A (en) * | 2023-12-18 | 2024-01-19 | 潍柴动力股份有限公司 | EGR system and control method thereof |
-
2016
- 2016-01-15 CN CN201620035840.6U patent/CN205532931U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105464847A (en) * | 2016-01-15 | 2016-04-06 | 吉林大学 | EGR system suitable for dual-fuel engine |
| CN109441599A (en) * | 2018-11-20 | 2019-03-08 | 汽解放汽车有限公司 | A kind of device and method adjusting exhaust gas shunt volume |
| CN117418969A (en) * | 2023-12-18 | 2024-01-19 | 潍柴动力股份有限公司 | EGR system and control method thereof |
| CN117418969B (en) * | 2023-12-18 | 2024-03-19 | 潍柴动力股份有限公司 | EGR system and control method thereof |
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