CN105386859A - Air inlet supplement system and method for vehicle turbocharged engine - Google Patents
Air inlet supplement system and method for vehicle turbocharged engine Download PDFInfo
- Publication number
- CN105386859A CN105386859A CN201510710676.4A CN201510710676A CN105386859A CN 105386859 A CN105386859 A CN 105386859A CN 201510710676 A CN201510710676 A CN 201510710676A CN 105386859 A CN105386859 A CN 105386859A
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- turbosupercharger
- motor
- engine
- gas compressor
- electrically
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000013589 supplement Substances 0.000 title abstract 4
- 239000007789 gas Substances 0.000 claims description 70
- 230000006835 compression Effects 0.000 claims description 10
- 238000007906 compression Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 10
- 239000000567 combustion gas Substances 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 230000000903 blocking effect Effects 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supercharger (AREA)
Abstract
The embodiment provides an air inlet supplement system and method for a vehicle turbocharged engine, and the air inlet supplement system comprises an air filter, a first turbocharger and a second turbocharger, wherein a turbine of the first turbocharger is arranged in an exhaust passage of the engine, fresh air passes through the air filter and then is divided into two paths, one path of fresh air is sequentially connected with a compressor and an intercooler of the first turbocharger, the other path of fresh air is connected with an air inlet end of the engine after being connected with the compressor of the second turbocharger, one path of fresh air is connected with the air inlet end of the engine through a third electric control valve, the other path of fresh air passes through the turbine of the second turbocharger and then is connected with the air inlet end of the engine, and a second electric control valve is arranged between the air filter and the compressor of the second turbocharger. The air inlet supplement system can effectively increase the fresh air intake of the engine under the condition of not improving the air inlet pressure of the engine.
Description
Technical field
The invention belongs to technical field of engines, specifically, relate to a kind of automobile-used turbosupercharged engine air inlet replenishment system and method.
Background technique
In vehicular engine field, exhaust-gas turbocharger has obtained application widely, its principle is: the energy drives turbine in the waste gas utilizing motor to discharge rotates, coaxial gas compressor is driven to rotate thus compressed by the air entering motor, to improve the density of the induced air of motor, reach and promote engine power, Optimizing Combustion the object of emissions reduction.Because turbosupercharging has hoisting power, reduces the effect of oil consumption, emissions reduction, therefore turbosupercharger becomes the indispensable critical component of current advanced motor, but because turbosupercharger is rotating type impeller machinery, it is comparatively complicated with mating of Reciprocating engine, and due to the working state frequent variations of vehicular engine, working zone is broad, makes the matched well of turbosupercharger and motor there is larger difficulty.
In real world applications, usually be devoted to improve Vehicle Turbocharged low engine speed moment of torsion, reach the object of the acceleration responsiveness improving Vehicle Turbocharged motor, need by the match point of pressurized machine and motor to tick-over zone-transfer, the lagging influence of minimizing pressurized machine.This matching way can cause supercharged engine compression ratio when high speed works too high, jeopardizes the reliability of motor, so need the turbine of portion bypass through pressurized machine when running up within the engine, to reach the object controlling boost pressure.Current turbosupercharged engine generally have employed the control mode of this exhaust gas bypass.
Exhaust gas bypass control mode protects the danger that motor avoids high compression ratio, but also there is defect.Along with motor is from middling speed to rotating speed lifting process at a high speed, the suction pressure of engine demand does not wish to increase, but air input of engine by air needs to increase.Now the gas compressor flow of pressurized machine increases, but pressure ratio is constant, causes gas compressor to be operated in blocking region, the efficiency of gas compressor declines rapidly, the overall efficiency of turbosupercharger declines, and due to the increase of bypass discharge quantity, exhaust energy utilization ratio declines by a big margin.This causes motor at high-speed region, and exhaust pressure is apparently higher than suction pressure, and intake and exhaust Negative Pressure Difference is excessive, and engine pumping work increases, and engine efficiency obviously declines.
Summary of the invention
The present invention to solve existing automobile-used turbosupercharged engine when high speed operating mode operates exhaust pressure apparently higher than suction pressure, intake and exhaust Negative Pressure Difference is excessive, engine pumping work increases, the technical problem that engine efficiency obviously declines, propose a kind of automobile-used turbosupercharged engine air inlet replenishment system method, can solve the problem.
In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions:
A kind of automobile-used turbosupercharged engine air inlet replenishment system, comprise air filter, first turbosupercharger and the second turbosupercharger, the turbine of described first turbosupercharger is arranged in the exhaust passageway of motor, fresh air is divided into two-way after described air filter, wherein a road in turn with the gas compressor of described first turbosupercharger, and intercooler connects, be connected with the inlet end of motor after an other road connects the gas compressor of described second turbosupercharger, the output terminal of a described intercooler wherein road the 3rd electrically-controlled valve is connected with the inlet end of motor, an other road is connected with the inlet end of motor after the turbine of described second turbosupercharger, the second electrically-controlled valve is provided with between the gas compressor of described air filter and described second turbosupercharger.
Further, an exhaust end wherein road first electrically-controlled valve discharge of motor, an other road is discharged through the turbine of described first turbosupercharger.
The present invention proposes a kind of automobile-used turbosupercharged engine air inlet compensation process simultaneously, comprises the automobile-used turbosupercharged engine air inlet replenishment system above described in any one, and described automobile-used turbosupercharged engine air inlet compensation process comprises the following steps:
(1), detect engine speed, and engine speed and threshold value are compared; When engine speed is lower than described threshold value, be low engine speed operating mode, otherwise, be motor high speed operating mode;
(2), during low engine speed operating mode, close described second electrically-controlled valve, open the 3rd electrically-controlled valve, motor combustion gas drives the turbine of described first turbosupercharger to rotate, the gas compressor of the first turbosupercharger is driven to rotate, the gas compressor of fresh air through the first turbosupercharger after described air filter is filtered compresses, and the fresh air of compression enters motor from engine charge end after intercooler cools;
During motor high speed operating mode, open described second electrically-controlled valve, regulate the aperture of the 3rd electrically-controlled valve, motor combustion gas drives the turbine of described first turbosupercharger to rotate, the gas compressor of the first turbosupercharger is driven to rotate, fresh air after described air filter is filtered wherein a road carry out compressing through the gas compressor of the first turbosupercharger successively and intercooler cools, the gas compressor that an other road enters the second turbosupercharger through described second electrically-controlled valve carries out compression boosting, the gas that intercooler exports is divided into two-way, the gas that wherein gas compressor of a road the 3rd electrically-controlled valve and the second turbosupercharger exports converges, motor is entered from engine charge end, an other road drives the turbine of described second turbosupercharger to rotate, rotate for driving the gas compressor of the second turbosupercharger.
Further, when motor high speed operating mode, regulating described first electrically-controlled valve aperture, for regulating the gas flow of the turbine through described first turbosupercharger, controlling the boost pressure of the gas compressor of described first turbosupercharger.
The beneficial effect of employing the invention described above technological scheme is: automobile-used turbosupercharged engine air inlet replenishment system of the present invention and method, can under the suction pressure condition not improving motor, by changing the working state of the gas compressor of the first turbosupercharger, improve the efficiency of the gas compressor of first turbosupercharger of motor when high speed, the fresh air intake of effective increase motor, improve exhaust energy utilization ratio, thus reduce the intake and exhaust Negative Pressure Difference of motor, increase the FAI Fresh Air Intake amount of motor when high speed, the working efficiency of effective raising motor.
Accompanying drawing explanation
Fig. 1 is a kind of embodiment's functional-block diagram of automobile-used turbosupercharged engine air inlet replenishment system proposed by the invention;
Fig. 2 adopts the cooperation line chart in Fig. 1 before and after automobile-used turbosupercharged engine air inlet replenishment system.
Embodiment
Be described principle of the present invention and feature below in conjunction with accompanying drawing, example, only for explaining the present invention, is not intended to limit scope of the present invention.
Embodiment one, the present embodiment proposes a kind of automobile-used turbosupercharged engine air inlet replenishment system, the present embodiment will be described in conjunction with automobile-used turbosupercharged engine air inlet compensation process, as shown in Figure 1, comprise air filter 10, first turbosupercharger 20 and the second turbosupercharger 30, the turbine 201 of described first turbosupercharger is arranged in the exhaust passageway of motor, fresh air is divided into two-way after described air filter 10, wherein a road in turn with the gas compressor 202 of described first turbosupercharger, and intercooler 40 connects, be connected with the inlet end of motor 50 after an other road connects the gas compressor 302 of described second turbosupercharger, the output terminal of a described intercooler 40 wherein road the 3rd electrically-controlled valve 63 is connected with the inlet end of motor 50, an other road is connected with the inlet end of motor 50 after the turbine 301 of described second turbosupercharger, the second electrically-controlled valve 62 is provided with between the gas compressor 302 of described air filter 10 and described second turbosupercharger.
Automobile-used turbosupercharged engine air inlet compensation process comprises the following steps:
S1, detection motor 50 rotating speed, and motor 50 rotating speed and threshold value are compared; When motor 50 rotating speed is lower than described threshold value, be low engine speed operating mode, otherwise, be motor high speed operating mode;
When motor 50 works, transmitter rotating speed changes at any time according to the operation of user, by arranging threshold value, motor 50 operating mode is divided into low engine speed operating mode and motor high speed operating mode, object is to solve ineffective problem under high speed operating mode more targetedly.At motor from middling speed to rotating speed lifting process at a high speed, the suction pressure of engine demand does not wish to increase, but air input of engine by air needs to increase.In prior art, now the gas compressor flow of pressurized machine increases, but pressure ratio is constant, causes gas compressor to be operated in blocking region, the efficiency of gas compressor declines rapidly, the overall efficiency of turbosupercharger declines, and due to the increase of bypass discharge quantity, exhaust energy utilization ratio declines by a big margin.This causes motor at high-speed region, and exhaust pressure is apparently higher than suction pressure, and intake and exhaust Negative Pressure Difference is excessive, and engine pumping work increases, and engine efficiency obviously declines.The automobile-used turbosupercharged engine air inlet compensation process of the present embodiment is by when high engine speeds is run, two-way will be divided into without pressure air, wherein route first turbocharger compresses, an other routing section is through the air work of the first turbocharger compresses, carry out small compression, change the working state of the gas compressor of the first turbosupercharger, air inlet tonifying Qi is carried out to motor, both air inflow was increased, do not increase gas pressure again simultaneously, thus avoid increase by first turbosupercharger flow, and then avoid it to be operated in blocking region, can avoid because bypass discharge quantity increases further, the problem that exhaust energy utilization ratio declines by a big margin.Context engine adds the fresh air intake of motor when running up, and improves exhaust energy utilization ratio, thus reduces the intake and exhaust Negative Pressure Difference of motor, effectively improves the working efficiency of motor.
When S2, low engine speed operating mode, close described second electrically-controlled valve 62, open the 3rd electrically-controlled valve 63, motor 50 combustion gas drives the turbine 201 of described first turbosupercharger to rotate, the gas compressor 202 of the first turbosupercharger is driven to rotate, the gas compressor 202 of fresh air through the first turbosupercharger after described air filter 10 is filtered compresses, and the fresh air of compression enters motor 50 from motor 50 inlet end after intercooler 40 cools; As known from the above, during low engine speed operating mode, the gas compressor that the air entering motor all flows through the first turbosupercharger compresses, and ensures suction pressure and the flow of motor under speed operation.
During motor high speed operating mode, open described second electrically-controlled valve 62, regulate the aperture of the 3rd electrically-controlled valve 63, motor 50 combustion gas drives the turbine 201 of described first turbosupercharger to rotate, the gas compressor 202 of the first turbosupercharger is driven to rotate, fresh air after described air filter 10 is filtered wherein a road carry out compressing through the gas compressor 202 of the first turbosupercharger successively and intercooler 40 cools, the gas compressor 302 that an other road enters the second turbosupercharger through described second electrically-controlled valve 62 carries out compression boosting, the gas that intercooler 40 exports is divided into two-way, the gas that wherein gas compressor 302 of a road the 3rd electrically-controlled valve 63 and the second turbosupercharger exports converges, motor 50 is entered from motor 50 inlet end, an other road drives the turbine 301 of described second turbosupercharger to rotate, rotate for driving the gas compressor 302 of the second turbosupercharger.The working efficiency how improving motor under high engine speeds operating mode is the technical problem that the present embodiment mainly solves, when running up within the engine, first fresh air is filtered by air filter 10, the stress-free fresh air that air filter 10 exports a wherein road is compressed rear pressure via the air of the gas compressor 202 of the first turbosupercharger, temperature all can raise, then cool through intercooler 40, a cooled pressurized gas part enters motor 50 through the 3rd electrically-controlled valve 63, an other road is for driving the second turbosupercharger, that is, the pressurized gas portion of energy acting exported by intercooler 40, motor 50 is entered again after having carried out decompression, the stress-free fresh air that air filter 10 exports wherein is pressurizeed by the gas compressor 302 of the second turbosupercharger on a road, due to this pressurization be part first turbosupercharger pressurization after air work complete, therefore, the pressure of the second turbosupercharger superheated steam is less than the pressure of the first turbosupercharger superheated steam, simultaneously, a part of air work of the first turbosupercharger, carry out transformation of energy, therefore, the corresponding reduction of gas pressure that first turbosupercharger exports, by regulating the aperture of the 3rd electrically-controlled valve 63 and the second electrically-controlled valve 62, to regulate the ratio entering the gas compressor 202 of motor first turbocharger and pressure device 302 air of the second turbocharger respectively, the pressure realizing two-part gas confluxes quite afterwards and inputs to motor 50, according to the MAP of engine operating condition and pressurized machine, the control program presetting electrically-controlled valve controls, the switching time of setting electrically-controlled valve and aperture control moment and the bypass amount of exhaust gas bypass.Therefore, suction pressure is not increased while finally achieving the air inflow increasing motor, and the turbine air amount flowing through the first gas compressor reduces relatively and boost pressure raising, make the first gas compressor away from blocking region, reduce the intake and exhaust Negative Pressure Difference of motor, effectively improve the working efficiency of motor.As shown in Figure 2, for adopting the cooperation line chart before and after air inlet replenishment system, within the engine under high-speed working condition, the air mass flow flowing through the gas compressor of the first turbosupercharger reduces and pressure rising, make gas compressor away from blocking region, remain on efficient region work.Fresh air is introduced by the second turbosupercharger, and to its compression, make actual enter engine air capacity than flow through gas compressor flow increase, boost pressure drops to the level that motor can tolerate, and the actual air inflow of motor is still identical with former matching way with suction pressure.
As a preferred embodiment, the exhaust end of motor 50 wherein road first electrically-controlled valve 61 is discharged, and an other road is discharged through the turbine 201 of described first turbosupercharger.
When motor high speed operating mode, regulating described first electrically-controlled valve 61 aperture, for regulating the gas flow of the turbine through described first turbosupercharger, controlling the boost pressure of the gas compressor 202 of described first turbosupercharger.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. an automobile-used turbosupercharged engine air inlet replenishment system, it is characterized in that, comprise air filter, first turbosupercharger and the second turbosupercharger, the turbine of described first turbosupercharger is arranged in the exhaust passageway of motor, fresh air is divided into two-way after described air filter, wherein a road in turn with the gas compressor of described first turbosupercharger, and intercooler connects, be connected with the inlet end of motor after an other road connects the gas compressor of described second turbosupercharger, the output terminal of a described intercooler wherein road the 3rd electrically-controlled valve is connected with the inlet end of motor, an other road is connected with the inlet end of motor after the turbine of described second turbosupercharger, the second electrically-controlled valve is provided with between the gas compressor of described air filter and described second turbosupercharger.
2. automobile-used turbosupercharged engine air inlet replenishment system according to claim 1, is characterized in that, an exhaust end wherein road first electrically-controlled valve discharge of motor, an other road is discharged through the turbine of described first turbosupercharger.
3. an automobile-used turbosupercharged engine air inlet compensation process, is characterized in that, comprises the automobile-used turbosupercharged engine air inlet replenishment system described in claim 1 or 2, and described automobile-used turbosupercharged engine air inlet compensation process comprises the following steps:
(1), detect engine speed, and engine speed and threshold value are compared; When engine speed is lower than described threshold value, be low engine speed operating mode, otherwise, be motor high speed operating mode;
(2), during low engine speed operating mode, close described second electrically-controlled valve, open the 3rd electrically-controlled valve, motor combustion gas drives the turbine of described first turbosupercharger to rotate, the gas compressor of the first turbosupercharger is driven to rotate, the gas compressor of fresh air through the first turbosupercharger after described air filter is filtered compresses, and the fresh air of compression enters motor from engine charge end after intercooler cools;
During motor high speed operating mode, open described second electrically-controlled valve, regulate the aperture of the 3rd electrically-controlled valve, motor combustion gas drives the turbine of described first turbosupercharger to rotate, the gas compressor of the first turbosupercharger is driven to rotate, fresh air after described air filter is filtered wherein a road carry out compressing through the gas compressor of the first turbosupercharger successively and intercooler cools, the gas compressor that an other road enters the second turbosupercharger through described second electrically-controlled valve carries out compression boosting, the gas that intercooler exports is divided into two-way, the gas that wherein gas compressor of a road the 3rd electrically-controlled valve and the second turbosupercharger exports converges, motor is entered from engine charge end, an other road drives the turbine of described second turbosupercharger to rotate, rotate for driving the gas compressor of the second turbosupercharger.
4. automobile-used turbosupercharged engine air inlet compensation process according to claim 3, it is characterized in that, when motor high speed operating mode, regulate described first electrically-controlled valve aperture, for regulating the gas flow of the turbine through described first turbosupercharger, control the boost pressure of the gas compressor of described first turbosupercharger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510710676.4A CN105386859B (en) | 2015-10-28 | 2015-10-28 | Air inlet supplement system and method for vehicle turbocharged engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510710676.4A CN105386859B (en) | 2015-10-28 | 2015-10-28 | Air inlet supplement system and method for vehicle turbocharged engine |
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| Publication Number | Publication Date |
|---|---|
| CN105386859A true CN105386859A (en) | 2016-03-09 |
| CN105386859B CN105386859B (en) | 2017-11-14 |
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| CN201510710676.4A Active CN105386859B (en) | 2015-10-28 | 2015-10-28 | Air inlet supplement system and method for vehicle turbocharged engine |
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Cited By (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 |
Citations (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 |
| EP1460248A1 (en) * | 2003-03-13 | 2004-09-22 | Peugeot Citroen Automobiles S.A. | Supercharged engine having an electric assisted turbocharger |
| CN102400773A (en) * | 2010-08-21 | 2012-04-04 | 奥迪股份公司 | Motor vehicle with engine and engine running method |
-
2015
- 2015-10-28 CN CN201510710676.4A patent/CN105386859B/en active Active
Patent Citations (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 |
| EP1460248A1 (en) * | 2003-03-13 | 2004-09-22 | Peugeot Citroen Automobiles S.A. | Supercharged engine having an electric assisted turbocharger |
| CN102400773A (en) * | 2010-08-21 | 2012-04-04 | 奥迪股份公司 | Motor vehicle with engine and engine running method |
Cited By (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 |
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| CN105386859B (en) | 2017-11-14 |
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