CN206360809U - EGR turbocharging system - Google Patents
EGR turbocharging system Download PDFInfo
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- CN206360809U CN206360809U CN201621409091.5U CN201621409091U CN206360809U CN 206360809 U CN206360809 U CN 206360809U CN 201621409091 U CN201621409091 U CN 201621409091U CN 206360809 U CN206360809 U CN 206360809U
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- egr
- turbine
- blast pipe
- engine
- air inlet
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- 238000002347 injection Methods 0.000 abstract description 15
- 239000007924 injection Substances 0.000 abstract description 15
- 239000007789 gas Substances 0.000 description 26
- 238000002485 combustion reaction Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 239000002912 waste gas Substances 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- 230000008450 motivation Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Supercharger (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
An EGR (exhaust gas recirculation) turbocharging system comprises a turbocharger, an EGR gas rail, an EGR nozzle and an engine, wherein a turbine gas inlet of the turbocharger is communicated with an exhaust pipe of the engine, a gas compressor gas inlet of the turbocharger is communicated with the exhaust pipe through a first exhaust pipe, and a gas compressor gas outlet is communicated with a gas inlet channel of the engine through a second exhaust pipe, the EGR gas rail and the EGR nozzle in sequence. The design not only improves the efficiency of the engine, but also realizes the accurate control of the direct injection EGR temperature.
Description
Technical field
The utility model belongs to internal combustion engine EGR technology field, and in particular to a kind of EGR turbo charge systems, it is adaptable to carry
The efficiency of high EGR direct fuel-injection engines, the accurate control for realizing direct-injection EGR temperature.
Background technology
At present, in face of increasingly severe environmental crisis, requirement of the various countries to Abgasgesetz is more and more stricter, therefore the row of reduction
Put the Main way as internal combustion engine development.EGR is used as reduction internal combustion engine NOxEffective emission controls by improving combustion measure of discharge, is also low
Discharge one of important technology route of gas engine.
There is operating lag effect in traditional egr system, excessive EGR rate is likely to occur in acceleration or loading procedure,
Cause emission to steeply rise, it is incomplete combustion, unstable or even catch fire；Meanwhile, when EGR rate is larger, a large amount of exhausts are introduced
To air inlet pipe, exhaust and the mixed effect of fresh charge are deteriorated, and cause EGR mixing and each cylinder EGR distribution uneven, make part cylinder
Concentration of emission is too high and combustion instability, and discharge and performance to engine have a negative impact.And EGR direct-injection systems can have
Effect solves the problems such as egr system delay, EGR amount are accurately controlled, and is one of the developing direction of following EGR strategies.
Chinese patent：Authorization Notice No. is CN205330831U, and authorized announcement date is the utility model on June 22nd, 2016
Patent discloses a kind of internal combustion engine EGR direct-injection systems, including high pressure EGR tube, and high pressure EGR tube one end is connected with exhaust main,
The other end is connected by EGR gas rail connecting tubes with EGR gas rail imports, and the outlet of EGR gas rail passes through EGR supply pipes and EGR nozzles
It is connected, EGR nozzles are arranged on cylinder or in the air intake duct of cylinder.Although the system can realize EGR quick sound
Answer, but the pressure that turbo-charged mode therein is used in plenum, EGR gas rails is then maintained by EGR pumps, therefore
Need to drive the operating of EGR pumps by outside energy, with upper type so that the capacity usage ratio of engine is relatively low, so as to have impact on hair
The efficiency of motivation.
The content of the invention
The purpose of this utility model is that the problem of engine efficiency for overcoming prior art to exist is low can have there is provided one kind
Effect improves the EGR turbo charge systems of EGR direct fuel-injection engine efficiency.
To realize object above, the technical solution of the utility model is as follows：
A kind of EGR turbo charge systems, including turbocharger, EGR gas rail, EGR nozzles, engine, the turbine increase
Depressor includes turbine, the compressor being coaxially disposed, and the air inlet of the turbine is communicated with waste pipe, described
The exhaust outlet of EGR gas rails is communicated by EGR nozzles with the air intake duct of engine；
The air inlet of the compressor is communicated by a blast pipe with blast pipe, and the exhaust outlet of compressor passes through No. two rows
Tracheae is communicated with the air inlet of EGR gas rails.
Charge air cooler before pressure, charge air cooler after pressure are respectively arranged with a number blast pipe, No. two blast pipes.
The system also includes being provided with turbine bypass valve on turbine by-pass pipe, the turbine by-pass pipe, the turbine by-pass
The air inlet of valve is communicated with blast pipe, and the exhaust outlet of turbine bypass valve is communicated with the blast pipe of turbine, and on a blast pipe
EGR stop valves are additionally provided with, the exhaust outlet of the EGR stop valves is communicated with the air inlet of charge air cooler before pressure.
Compared with prior art, the beneficial effects of the utility model are：
1st, the air inlet of compressor passes through a blast pipe and engine in a kind of EGR turbo charge systems of the utility model
Blast pipe communicate, the exhaust outlet of compressor is communicated by No. two blast pipes with the air inlet of EGR gas rails, when system is operated,
The waste gas discharged by the exhaust pipe of engine is divided into two parts, and a part is carried as driving source into turbine for turbocharger
For driving force, another part then flows into compressor, EGR gas rails is entered after compressor pressure, and maintain the pressure in EGR gas rails
Power, sprays, the design is pressurized using engine exhaust energy to EGR finally by EGR nozzles, without external force, no
The EGR common rail systems of a pressure stability can be only set up, advantage are provided for EGR direct-injections, and improve engine
Capacity usage ratio, so as to improve engine efficiency.Therefore, the utility model not only contributes to EGR direct-injections, and improves hair
Motivation efficiency.
2nd, a blast pipe in a kind of EGR turbo charge systems of the utility model, on No. two blast pipes be respectively arranged with pressure
Charge air cooler after preceding charge air cooler, pressure, passes through the controllable EGR temperature for entering compressor of the amount of cooling water for adjusting charge air cooler before pressure, it is to avoid
Compressor is caused to damage because EGR temperature is too high, the amount of cooling water of charge air cooler can control the EGR temperature in EGR gas rails after regulation pressure, and
The stabilization of EGR temperature in EGR gas rails is maintained, so as to realize the accurate control of direct-injection EGR temperature.Therefore, the utility model is not only
Compressor can be protected, and accurately controls direct-injection EGR temperature.
3rd, a kind of EGR turbo charge systems of the utility model are parallel with the turbine by-pass with turbine bypass valve on turbine
Pipe, and be additionally provided with a blast pipe with the EGR stop valves that communicate of charge air cooler air inlet before pressure, by turbine bypass valve with
The regulation of EGR stop valves, can not only control EGR supercharging levels（EGR gas rail rail pressures）, and can realize whether there is the fast of EGR superchargings
Speed switching.Therefore, the utility model can realize the control to EGR supercharging levels and whether there is being switched fast for EGR superchargings.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
In figure：
Turbocharger 1, turbine 11, compressor 12, EGR gas rail 2, EGR nozzles 3, engine 4, blast pipe 41, No. one
Charge air cooler 8, turbine by-pass pipe 9, turbine by-pass after blast pipe 5, EGR stop valves 51, No. two blast pipes 6, the preceding charge air cooler 7 of pressure, pressures
Valve 91；
Arrow direction is airflow direction.
Embodiment
Explanation and embodiment are described in further detail to the utility model below in conjunction with the accompanying drawings.
Referring to Fig. 1, a kind of EGR turbo charge systems, including turbocharger 1, EGR gas rail 2, EGR nozzles 3, engine
4, the turbocharger 1 includes turbine 11, the compressor 12 being coaxially disposed, the air inlet and engine of the turbine 11
4 blast pipe 41 is communicated, and the exhaust outlet of the EGR gas rail 2 is communicated by EGR nozzles 3 with the air intake duct of engine 4；
The air inlet of the compressor 12 is communicated by a blast pipe 5 with blast pipe 41, and the exhaust outlet of compressor 12 leads to
The air inlet that No. two blast pipes 6 are crossed with EGR gas rail 2 is communicated.
Charge air cooler 7 before pressure, charge air cooler 8 after pressure are respectively arranged with a number blast pipe 5, No. two blast pipes 6.
The system also includes being provided with turbine bypass valve 91 on turbine by-pass pipe 9, the turbine by-pass pipe 9, the turbine
The air inlet of by-passing valve 91 is communicated with blast pipe 41, and the exhaust outlet of turbine bypass valve 91 is communicated with the blast pipe of turbine 11, and
EGR stop valves 51 are additionally provided with a number blast pipe 5, the air inlet phase of the exhaust outlet and charge air cooler 7 before pressure of the EGR stop valves 51
It is logical.
Principle of the present utility model is described as follows：
EGR direct-injection systems are mainly accurately quick by the EGR with certain pressure in EGR gas rails by EGR Jet controls
Spray, and EGR superchargings are foundation and the key for maintaining EGR gas rail pressure power, are also the premise for realizing EGR direct-injections.Therefore, this practicality
It is new to propose a kind of EGR supercharging modes of utilization exhaust gas turbocharge, the waste gas discharged by engine is divided into two parts, one
It is that turbocharger 1 provides driving force that portion enters turbine 11 as driving source, and another part waste gas then enters as EGR
Enter compressor 12, input EGR gas rail 3, maintains the pressure in EGR gas rail 3 after being pressurized through compressor 12.The design is not only solved
The driving problems of EGR superchargings, while the utilization of exhaust energy can help to improve engine power utilization rate, improve engine effect
Rate.
The utility model can realize EGR direct-injection functions by the switch-mode regulation to turbine bypass valve 91, EGR stop valves 51
What is opened and closed is switched fast, and is specially：
When turbine bypass valve 91 is closed, and EGR stop valves 51 are opened, system enters EGR pressurized states, realizes normal EGR
Direct-injection function；
When turbine bypass valve 91 is opened, and EGR stop valves 51 are closed, turbine 11 is bypassed, the waste gas from engine
Discharged by turbine by-pass pipe 9, system enters without EGR pressurized states, and EGR direct-injections function is closed.
Embodiment 1：
Referring to Fig. 1, a kind of EGR turbo charge systems, including turbocharger 1, EGR gas rail 2, EGR nozzles 3, engine
4th, turbine by-pass pipe 9, the turbocharger 1 includes the turbine 11, the compressor 12 that are coaxially disposed, and the turbine 11 enters
Gas port is communicated with the blast pipe 41 of engine 4, and the air inlet of the compressor 12 passes through a blast pipe 5 and the phase of blast pipe 41
Logical, the exhaust outlet of compressor 12 passes sequentially through No. two blast pipes 6, EGR gas rail 2, the air intake duct phase of EGR nozzles 3 and engine 4
It is logical, during a blast pipe 5 is provided with before charge air cooler 7, EGR stop valves 51 before pressure, the exhaust outlet and pressure of the EGR stop valves 51
The air inlet of cooler 7 is communicated, and is provided with charge air cooler 8 after pressure, the turbine by-pass pipe 9 and is provided with No. two blast pipes 6
Turbine bypass valve 91, the air inlet of the turbine bypass valve 91 is communicated with blast pipe 41, the exhaust outlet and turbine of turbine bypass valve 91
The blast pipe of machine 11 is communicated.
Claims (3)
1. a kind of EGR turbo charge systems, including turbocharger（1）, EGR gas rails（2）, EGR nozzles（3）, engine（4）,
The turbocharger（1）Including coaxially connected turbine（11）, compressor（12）, the turbine（11）Air inlet with
Engine（4）Blast pipe（41）Communicate, the EGR gas rail（2）Exhaust outlet pass through EGR nozzles（3）With engine（4）Enter
Air flue is communicated, it is characterised in that：
The compressor（12）Air inlet pass through a blast pipe（5）With blast pipe（41）Communicate, compressor（12）Exhaust
Mouth passes through No. two blast pipes（6）With EGR gas rails（2）Air inlet communicate.
2. a kind of EGR turbo charge systems according to claim 1, it is characterised in that：A number blast pipe（5）, two
Number blast pipe（6）On be respectively arranged with pressure before charge air cooler（7）, charge air cooler after pressure（8）.
3. a kind of EGR turbo charge systems according to claim 1 or 2, it is characterised in that：The system also includes turbine
Bypass pipe（9）, the turbine by-pass pipe（9）On be provided with turbine bypass valve（91）, the turbine bypass valve（91）Air inlet with
Blast pipe（41）Communicate, turbine bypass valve（91）Exhaust outlet and turbine（11）Blast pipe communicate, an and blast pipe（5）
On be additionally provided with EGR stop valves（51）, the EGR stop valves（51）Exhaust outlet with pressure before charge air cooler（7）Air inlet communicate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621409091.5U CN206360809U (en) | 2016-12-21 | 2016-12-21 | EGR turbocharging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621409091.5U CN206360809U (en) | 2016-12-21 | 2016-12-21 | EGR turbocharging system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206360809U true CN206360809U (en) | 2017-07-28 |
Family
ID=59375474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621409091.5U Active CN206360809U (en) | 2016-12-21 | 2016-12-21 | EGR turbocharging system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206360809U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762246A (en) * | 2016-12-21 | 2017-05-31 | 东风商用车有限公司 | EGR turbocharging system |
-
2016
- 2016-12-21 CN CN201621409091.5U patent/CN206360809U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762246A (en) * | 2016-12-21 | 2017-05-31 | 东风商用车有限公司 | EGR turbocharging system |
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