CN105386859B - Automobile-used turbocharged engine air inlet replenishment system and method - Google Patents
Automobile-used turbocharged engine air inlet replenishment system and method Download PDFInfo
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- CN105386859B CN105386859B CN201510710676.4A CN201510710676A CN105386859B CN 105386859 B CN105386859 B CN 105386859B CN 201510710676 A CN201510710676 A CN 201510710676A CN 105386859 B CN105386859 B CN 105386859B
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- engine
- turbocharger
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/04—Engines with exhaust drive and other drive of pumps, e.g. with exhaust-driven pump and mechanically-driven second pump
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/12—Control of the pumps
-
- 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
Abstract
The present embodiment proposes a kind of automobile-used turbocharged engine air inlet replenishment system and method, including air filter, first turbocharger and the second turbocharger, the turbine of first turbocharger is arranged in the exhaust channel of engine, fresh air is divided into two-way after the air filter, the wherein sequentially compressor with first turbocharger all the way, and charge air cooler connection, it is connected after connecting the compressor of second turbocharger all the way in addition with the inlet end of engine, the output end of the charge air cooler wherein connects through the inlet end of the 3rd electrically-controlled valve and engine all the way, it is connected all the way after the turbine of second turbocharger with the inlet end of engine in addition, the second electrically-controlled valve is provided between the compressor of the air filter and second turbocharger.The air inlet replenishment system of the present invention, the fresh air soakage of engine under the conditions of the admission pressure of engine is not improved, can be effectively increased.
Description
Technical field
The invention belongs to technical field of engines, specifically, is related to a kind of automobile-used turbocharged engine air inlet supplement
System and method.
Background technology
In vehicular engine field, exhaust-driven turbo-charger exhaust-gas turbo charger has obtained very extensive application, and its principle is：Utilize hair
Energy driving turbine rotation in the waste gas of motivation discharge, drives coaxial compressor to rotate so as to enter the air of engine
It is compressed, to improve the density of the induced air of engine, reaches lifting engine power, optimization is burnt and reduces the purpose of discharge.
First seted out now because turbocharging has the function that hoisting power, reduction oil consumption, reduction discharge, therefore turbocharger turn into
The indispensable critical component of motivation, but because turbocharger is that rotating type impeller is mechanical, its with reciprocating engine
With complex, and because the working condition of vehicular engine frequently changes, working region is broad so that turbocharger with
Bigger difficulty be present in the matched well of engine.
In practical application, it is typically directed to improve Vehicle Turbocharged low engine speed moment of torsion, reaches and improve Vehicle Turbocharged hair
The purpose of the acceleration responsiveness of motivation is reduced and increased, it is necessary to by the match point of booster and engine to tick-over zone-transfer
The lagging influence of depressor.This matching way can cause engine with supercharger compression ratio when high speed works too high, jeopardize and start
The reliability of machine, so the turbine by portion bypass by booster is needed when running at high speed within the engine, to reach
Control the purpose of boost pressure.Current turbocharged engine generally employs the control mode of this exhaust gas bypass.
Exhaust gas bypass control mode protects engine from the danger of high compression ratio, but there is also defect.With hair
In rotating speed lifting process of the motivation from middling speed to high speed, the admission pressure of engine demand is not intended to increase, but engine charge
Amount needs to increase.The now compressor flow increase of booster, but pressure ratio is constant, causes compressor to be operated in blocking region, pressure
The efficiency of mechanism of qi declines rapidly, and the overall efficiency of turbocharger declines, and due to bypass discharge quantity increase, exhaust energy profit
Declined by a big margin with efficiency.This causes engine in high-speed region, and pressure at expulsion is apparently higher than admission pressure, intake and exhaust negative pressure
Difference is excessive, and engine pumping work increase, engine efficiency is decreased obviously.
The content of the invention
It is substantially high that the present invention to be solved existing automobile-used turbocharged engine pressure at expulsion when high speed operating mode operates
In admission pressure, intake and exhaust Negative Pressure Difference is excessive, engine pumping work increase, the technical problem that engine efficiency is decreased obviously, carries
A kind of automobile-used turbocharged engine air inlet replenishment system method is gone out, can solve the above problems.
In order to solve the above-mentioned technical problem, the present invention is achieved using following technical scheme：
A kind of automobile-used turbocharged engine air inlet replenishment system, including air filter, the first turbocharger and the second whirlpool
Booster is taken turns, the turbine of first turbocharger is arranged in the exhaust channel of engine, and fresh air is through the air filter
It is divided into two-way after device, wherein being sequentially connected all the way with the compressor and charge air cooler of first turbocharger, in addition all the way
It is connected after connecting the compressor of second turbocharger with the inlet end of engine, the output end wherein one of the charge air cooler
The inlet end of the electrically-controlled valves of Lu Jing tri- and engine connects, in addition all the way after the turbine of second turbocharger with starting
The inlet end connection of machine, the second electrically-controlled valve is provided between the air filter and the compressor of second turbocharger.
Further, the exhaust end of engine is wherein discharged through the first electrically-controlled valve all the way, in addition all the way through first whirlpool
Take turns the turbine discharge of booster.
The present invention proposes a kind of automobile-used turbocharged engine air inlet compensation process simultaneously, including above described in any one
Automobile-used turbocharged engine air inlet replenishment system, the automobile-used turbocharged engine air inlet compensation process includes following step
Suddenly：
(1) engine speed, is detected, and by engine speed compared with threshold value；When engine speed is less than described
It is low engine speed operating mode during threshold value, is engine high speed operating mode otherwise；
(2), during low engine speed operating mode, second electrically-controlled valve is closed, opens the 3rd electrically-controlled valve, engine discharge waste gas
Drive the turbine of first turbocharger to rotate, drive the compressor rotation of the first turbocharger, fresh air is through institute
The compressor through the first turbocharger is compressed after stating air filter filtering, and the fresh air of compression is cooled down through charge air cooler
Enter engine from engine charge end afterwards；
During engine high speed operating mode, second electrically-controlled valve is opened, adjusts the aperture of the 3rd electrically-controlled valve, engine discharge
The turbine rotation of first turbocharger described in exhaust gas driven, drive the compressor rotation of the first turbocharger, fresh air
Compressor wherein all the way successively through the first turbocharger after air filter filtering is compressed and charge air cooler is carried out
Cooling, the compressor for entering the second turbocharger through second electrically-controlled valve all the way in addition are compressed boosting, and charge air cooler is defeated
The gas gone out is divided into two-way, wherein the gas that the compressor all the way through the 3rd electrically-controlled valve and the second turbocharger exports converges,
Enter engine from engine charge end, drive the turbine of second turbocharger to rotate all the way in addition, for driving the
The compressor rotation of two turbocharger.
Further, when engine high speed operating mode, the first automatically controlled valve opening is adjusted, for adjusting described in process
The gas flow of the turbine of first turbocharger, control the boost pressure of the compressor of first turbocharger.
Beneficial effect using the invention described above technical scheme is：The automobile-used turbocharged engine air inlet supplement of the present invention
System and method, can be under the conditions of the admission pressure of engine not be improved, by the compressor for changing first turbocharger
Working condition, the efficiency of the compressor of first turbocharger of the engine in high speed is improved, is effectively increased engine
Fresh air soakage, exhaust energy utilization ratio is improved, so as to reduce the intake and exhaust Negative Pressure Difference of engine, increase engine exists
FAI Fresh Air Intake amount during high speed, effectively improve the operating efficiency of engine.
Brief description of the drawings
Fig. 1 is a kind of embodiment principle square frame of automobile-used turbocharged engine air inlet replenishment system proposed by the invention
Figure；
Fig. 2 is to use the cooperation line chart in Fig. 1 before and after automobile-used turbocharged engine air inlet replenishment system.
Embodiment
The principle and feature of the present invention are described below in conjunction with accompanying drawing, the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the present invention.
Embodiment one, the present embodiment propose a kind of automobile-used turbocharged engine air inlet replenishment system, and the present embodiment will
Illustrated with reference to automobile-used turbocharged engine air inlet compensation process, as shown in figure 1, increasing including air filter 10, the first turbine
The turbocharger 30 of depressor 20 and second, the turbine 201 of first turbocharger are arranged in the exhaust channel of engine,
Fresh air is divided into two-way after the air filter 10, wherein all the way sequentially the compressor 202 with first turbocharger,
And charge air cooler 40 connects, the air inlet with engine 50 after the compressor 302 of second turbocharger is connected all the way in addition
End connection, the output end of the charge air cooler 40 are wherein connected through the 3rd electrically-controlled valve 63 with the inlet end of engine 50 all the way, in addition
Be connected all the way after the turbine 301 of second turbocharger with the inlet end of engine 50, the air filter 10 with it is described
The second electrically-controlled valve 62 is provided between the compressor 302 of second turbocharger.
Automobile-used turbocharged engine air inlet compensation process comprises the following steps：
S1, the detection rotating speed of engine 50, and by the rotating speed of engine 50 compared with threshold value；When the rotating speed of engine 50 is less than
It is low engine speed operating mode during the threshold value, is engine high speed operating mode otherwise；
When engine 50 works, transmitter rotating speed changes at any time according to the operation of user, by setting threshold value, by engine
50 operating modes are divided into low engine speed operating mode and engine high speed operating mode, in order to more targeted solution high speed work
Ineffective problem under condition.In rotating speed lifting process of the engine from middling speed to high speed, the air inlet pressure of engine demand
Power is not intended to increase, but air input of engine by air needs to increase.The now compressor flow increase of booster in the prior art, but press
Than constant, compressor is caused to be operated in blocking region, the efficiency of compressor declines rapidly, under the overall efficiency of turbocharger
Drop, and because bypass discharge quantity increase, exhaust energy utilization ratio decline by a big margin.This causes engine in high velocity
Domain, pressure at expulsion is apparently higher than admission pressure, and intake and exhaust Negative Pressure Difference is excessive, engine pumping work increase, and engine efficiency is obvious
Decline.The automobile-used turbocharged engine air inlet compensation process of the present embodiment is by when high engine speeds are run, by no pressure
Air is divided into two-way, wherein first turbocharger compresses of route, a routing section is through the first turbocharger compresses in addition
Air work, carry out small compression, change the first turbocharger compressor working condition, to engine carry out air inlet
Tonifying Qi, air inflow is both increased, while increases by the first turbocharger flow without increase gas pressure so as to avoid again,
And then avoid it from being operated in blocking region, it can further avoid because bypass discharge quantity increases, under exhaust energy utilization ratio
The problem of range of decrease degree is very big.Context engine adds fresh air soakage of the engine when running at high speed, and improves waste gas
Energy utilization efficiency, so as to reduce the intake and exhaust Negative Pressure Difference of engine, effectively improve the operating efficiency of engine.
When S2, low engine speed operating mode, second electrically-controlled valve 62 is closed, opens the 3rd electrically-controlled valve 63, the row of engine 50
The turbine 201 for going out the first turbocharger described in exhaust gas driven rotates, and drives the compressor 202 of the first turbocharger to rotate,
Fresh air compressor 202 through the first turbocharger after the air filter 10 filtering is compressed, the fresh sky of compression
Gas enters engine 50 after charge air cooler 40 is cooled down from the inlet end of engine 50；As known from the above, low engine speed operating mode
When, the air into engine all flows through the compressor of the first turbocharger and is compressed, and ensures to start under speed operation
The admission pressure and flow of machine.
During engine high speed operating mode, second electrically-controlled valve 62 is opened, adjusts the aperture of the 3rd electrically-controlled valve 63, engine
The turbine 201 of the first turbocharger rotates described in 50 discharge exhaust gas drivens, drives the compressor 202 of the first turbocharger to revolve
Turn, fresh air after the air filter 10 filtering wherein pressed successively all the way by the compressor 202 through the first turbocharger
Contracting and charge air cooler 40 are cooled down, and enter the compressor of the second turbocharger through second electrically-controlled valve 62 all the way in addition
302 are compressed boosting, and the gas that charge air cooler 40 exports is divided into two-way, wherein increasing all the way through the 3rd electrically-controlled valve 63 and the second turbine
The gas that the compressor 302 of depressor exports converges, and enters engine 50 from the inlet end of engine 50, drives described all the way in addition
The turbine 301 of two turbocharger rotates, for driving the compressor 302 of the second turbocharger to rotate.How in engine
The operating efficiency that engine is improved under high-speed working condition is the main technical problems to be solved of the present embodiment, is run at high speed within the engine
When, fresh air is filtered by air filter 10 first, air filter 10 export no pressure fresh air wherein all the way via
Pressure, temperature can raise after the air of the compressor 202 of first turbocharger is compressed, and then be cooled down through charge air cooler 40,
A compressed gas part after cooling enters engine 50 through the 3rd electrically-controlled valve 63, is used to drive the second turbocharging in addition all the way
Device, that is to say, that the compressed gas portion of energy exported by charge air cooler 40 is done work, and engine 50 is entered back into after being depressurized,
The fresh air for the no pressure that air filter 10 exports wherein is pressurizeed by the compressor 302 of the second turbocharger all the way, by
Air work completion after this pressurization is the turbocharger pressurization of part first, therefore, the second turbocharger pressurization gas
The pressure of body is less than the pressure of the first turbocharger gas-pressurized, meanwhile, a part of gas of the first turbocharger is done
Work(, energy conversion is carried out, therefore, the gas pressure of the first turbocharger output accordingly reduces, automatically controlled by regulation the 3rd
The aperture of the electrically-controlled valve 62 of valve 63 and second, the compressor 202 and the of the turbocharger of engine first is respectively enterd with regulation
The ratio of the air of pressure device 302 of two turbochargers, realize that the pressure of two parts gas is quite confluxed afterwards and input to engine
50, according to engine operating condition and the MAP of booster, the control program of electrically-controlled valve is preset to control, sets opening for electrically-controlled valve
At the time of moment and aperture are closed to control exhaust gas bypass and bypass amount.Therefore, the air inflow of increase engine is finally realized
Simultaneously without increasing admission pressure, and flow through the turbine air amount of the first compressor with respect to reduction and boost pressure improves, make the
One compressor reduces the intake and exhaust Negative Pressure Difference of engine away from blocking region, effectively improves the operating efficiency of engine.Such as Fig. 2
It is shown, using the cooperation line chart before and after air inlet replenishment system, within the engine under high-speed working condition, to flow through the increasing of the first turbine
The air mass flow of the compressor of depressor is reduced and pressure rise, compressor is maintained at efficient region work away from blocking region.
Fresh air is introduced by the second turbocharger, and it compressed, makes to actually enter engine air capacity ratio and flows through pressure
The flow increase of mechanism of qi, boost pressure drop to the level that engine is resistant to, the actual air inflow and air inlet pressure of engine
Power is still identical with former matching way.
As a preferred embodiment, the exhaust end of engine 50 is wherein discharged through the first electrically-controlled valve 61 all the way, in addition
Turbine 201 all the way through first turbocharger is discharged.
When engine high speed operating mode, the aperture of the first electrically-controlled valve 61 is adjusted, passes through first whirlpool for adjusting
The gas flow of the turbine of booster is taken turns, controls the boost pressure of the compressor 202 of first turbocharger.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (2)
1. a kind of automobile-used turbocharged engine air inlet compensation process, it is characterised in that the automobile-used turbocharged engine enters
The automobile-used turbocharged engine air inlet replenishment system of gas compensation process, including air filter, the first turbocharger and the second whirlpool
Booster is taken turns, the turbine of first turbocharger is arranged in the exhaust channel of engine, and fresh air is through the air filter
It is divided into two-way after device, wherein being sequentially connected all the way with the compressor and charge air cooler of first turbocharger, in addition all the way
It is connected after connecting the compressor of second turbocharger with the inlet end of engine, the output end wherein one of the charge air cooler
The inlet end of the electrically-controlled valves of Lu Jing tri- and engine connects, in addition all the way after the turbine of second turbocharger with starting
The inlet end connection of machine, the second electrically-controlled valve, institute are provided between the air filter and the compressor of second turbocharger
The exhaust end for stating engine in automobile-used turbocharged engine air inlet replenishment system is wherein discharged through the first electrically-controlled valve all the way, in addition
Turbine discharge through first turbocharger all the way, the automobile-used turbocharged engine air inlet compensation process includes following
Step：
(1) engine speed, is detected, and by engine speed compared with threshold value；When engine speed is less than the threshold value
When, it is low engine speed operating mode, is engine high speed operating mode otherwise；
(2), during low engine speed operating mode, second electrically-controlled valve is closed, opens the 3rd electrically-controlled valve, engine discharge exhaust gas driven
The turbine rotation of first turbocharger, the compressor rotation of the first turbocharger is driven, fresh air is through the sky
The compressor through the first turbocharger is compressed after filter filtering, the fresh air of compression after charge air cooler is cooled down from
Engine charge end enters engine；
During engine high speed operating mode, second electrically-controlled valve is opened, adjusts the aperture of the 3rd electrically-controlled valve, engine discharge waste gas
Drive the turbine of first turbocharger to rotate, drive the compressor rotation of the first turbocharger, fresh air is through institute
State that compressor wherein all the way successively through the first turbocharger after air filter filtering is compressed and charge air cooler is cooled down,
The compressor for entering the second turbocharger through second electrically-controlled valve all the way in addition is compressed boosting, the gas of charge air cooler output
Body is divided into two-way, wherein the gas that the compressor through the 3rd electrically-controlled valve and the second turbocharger exports all the way converges, from starting
Machine inlet end enters engine, drives the turbine of second turbocharger to rotate all the way in addition, for driving the second turbine
The compressor rotation of booster.
2. automobile-used turbocharged engine air inlet compensation process according to claim 1, it is characterised in that when in engine
During high-speed working condition, the first automatically controlled valve opening is adjusted, for adjusting the gas of the turbine Jing Guo first turbocharger
Flow, control the boost pressure of the compressor of first turbocharger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510710676.4A CN105386859B (en) | 2015-10-28 | 2015-10-28 | Automobile-used turbocharged engine air inlet replenishment system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510710676.4A CN105386859B (en) | 2015-10-28 | 2015-10-28 | Automobile-used turbocharged engine air inlet replenishment system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105386859A CN105386859A (en) | 2016-03-09 |
| CN105386859B true CN105386859B (en) | 2017-11-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510710676.4A Active CN105386859B (en) | 2015-10-28 | 2015-10-28 | Automobile-used turbocharged engine air inlet replenishment system and method |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114320575A (en) * | 2022-01-06 | 2022-04-12 | 一汽解放汽车有限公司 | Internal combustion engine system and control method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2877622A (en) * | 1954-11-18 | 1959-03-17 | Associated British Oil Engines | Heat engines |
| US5207063A (en) * | 1991-10-21 | 1993-05-04 | Alliedsignal Inc. | Turbocharger system for internal combustion engine and method of operation |
| US5577385A (en) * | 1995-09-11 | 1996-11-26 | Kapich; Davorin D. | Electropneumatic engine supercharger system |
| FR2852356B1 (en) * | 2003-03-13 | 2005-04-29 | SUPER-POWERED MOTOR WITH ELECTRICALLY ASSISTED TURBOCOMPRESSOR | |
| DE102010035085B4 (en) * | 2010-08-21 | 2019-08-08 | Audi Ag | Motor vehicle with an internal combustion engine and method for operating an internal combustion engine |
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