CN114060141B - Two-stage series pulse combined supercharging device of diesel engine and control method thereof - Google Patents
Two-stage series pulse combined supercharging device of diesel engine and control method thereof Download PDFInfo
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- CN114060141B CN114060141B CN202111374735.7A CN202111374735A CN114060141B CN 114060141 B CN114060141 B CN 114060141B CN 202111374735 A CN202111374735 A CN 202111374735A CN 114060141 B CN114060141 B CN 114060141B
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000005474 detonation Methods 0.000 claims abstract description 96
- 238000002485 combustion reaction Methods 0.000 claims abstract description 65
- 230000002000 scavenging effect Effects 0.000 claims abstract description 14
- 230000008569 process Effects 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 49
- 239000000446 fuel Substances 0.000 abstract description 4
- 230000004044 response Effects 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 239000002737 fuel gas Substances 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 239000000203 mixture Substances 0.000 description 6
- 208000028659 discharge Diseases 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 230000001668 ameliorated effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000007921 spray 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
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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
- F02B37/12—Control of the pumps
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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
- F02B37/12—Control of the pumps
- F02B37/16—Control of the pumps by bypassing charging air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D23/00—Controlling engines characterised by their being supercharged
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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 invention discloses a two-stage series pulse combined supercharging device of a diesel engine and a control method thereof, wherein the two-stage series pulse combined supercharging device comprises the following components: the device comprises an engine, an air inlet intercooler, a high-pressure stage compressor, an exhaust gas turbine, an air filter, a low-pressure stage compressor and a pulse gas turbine, wherein two ends of the low-pressure stage compressor are connected with bypass valves, and an electromagnetic valve and a pulse detonation combustion chamber are connected between the high-pressure stage compressor and the pulse gas turbine; the air inlet section and the knocking section of the pulse knocking combustion chamber are provided with oil injectors, the premixing section is provided with a pneumatic valve, and the ignition section is provided with a spark plug; when the engine is suddenly accelerated, the bypass valve is closed, and the electromagnetic valve is opened; the rear part of gas of the high-pressure-stage gas compressor enters a pulse detonation combustion chamber, a fuel injector injects fuel, a spark plug ignites, the mixed gas detonates and combusts and discharges fuel gas to push a pulse gas turbine to drive the low-pressure-stage gas compressor. The invention can reduce the back pressure of the PDC outlet, realize the natural scavenging of the PDC, is beneficial to the stable, continuous and rapid detonation of the PDC, can rapidly improve the air inlet pressure of the engine and accelerate the response characteristic of the engine.
Description
Technical Field
The invention belongs to the field of engine combustion and control, and particularly relates to a two-stage series pulse combined supercharging device of a diesel engine and a control method thereof.
Background
The traditional supercharging technology has the problems of long supercharging response time and poor supercharging effect in plateau areas. These problems can be ameliorated by using knock boosting techniques. Compared with Diesel isobaric pressure, the circulating pulse detonation combustion has the advantages of high circulating heat efficiency, large unit thrust weight ratio, self-pressurization in the combustion process and the like, and is shown in figure 1.
Under the normal working condition, an inlet valve of a pulse detonation combustor (Pulse Detonation Combusiton Chambar, PDC for short) is closed, and the diesel engine works normally. When the diesel engine runs under a small load, the output power of the diesel engine is increased instantaneously, and the acceleration performance of the diesel engine cannot meet the requirements due to the response delay of the exhaust gas turbocharging. At the moment, the valve of the knocking afterburner is opened in advance, the fuel system is controlled to inject fuel, and the technical characteristics of high-speed combustion heat release, constant volume pressure rise and the like of the knocking combustion technology are utilized, so that high-temperature and high-pressure working media are obtained in a very short time, the turbocharger is pushed to rotate rapidly, and sufficient air inlet charge is provided for a diesel engine. The existing pulse supercharging technology generally connects the exhaust end of a pulse supercharging knocking pipe directly to an exhaust pipe, mixes pulse knocking gas with engine exhaust gas in the exhaust pipe, and accordingly improves the pressure and temperature of turbine air inlet, and enables other pressure of a compressor outlet to be higher. However, the method has the problem that the air inlet of the detonation tube is difficult, and the pressure of the exhaust pipe is higher than that of the detonation tube during the scavenging process of the detonation tube, so that the detonation tube cannot effectively discharge the exhaust gas. Continuous detonation inside a pulse detonation tube presents difficulties.
However, the method has the problem that the air inlet of the detonation tube is difficult, and in the process of scavenging the detonation tube, the pressure of the exhaust pipe is higher than that of the detonation tube, so that the detonation tube cannot effectively discharge waste gas, and continuous detonation inside the pulse detonation tube is difficult.
Disclosure of Invention
In order to solve the problems that the traditional pulse supercharging scavenging is difficult and continuous stable detonation cannot be realized, the invention provides the two-stage series pulse combined supercharging device for the diesel engine and the control method thereof, which reduce the back pressure of a PDC outlet, realize the natural scavenging of the PDC, and are beneficial to the stable continuous quick detonation of the PDC.
The aim of the invention can be achieved by the following technical scheme.
The invention discloses a two-stage serial pulse combined supercharging device of a diesel engine, which comprises an engine, an air inlet intercooler, a high-pressure stage air compressor, an exhaust turbine and an air filter, wherein an air inlet of the engine is connected with an air outlet of the air inlet intercooler through an air inlet main pipe, an air inlet of the air inlet intercooler is connected with an air outlet of the high-pressure stage air compressor through a pipeline, an air inlet of the high-pressure stage air compressor is connected with an air outlet of the air filter through an air outlet main pipe, a low-pressure stage air compressor is connected between the air inlet of the high-pressure stage air compressor and the air outlet of the air filter through a pipeline, a bypass valve is connected between the air inlet of the low-pressure stage air compressor and the air outlet of the air filter through a pipeline, an electromagnetic valve and a pulse detonation combustion chamber are connected between the air outlet of the high-pressure stage air compressor and the air inlet of the pulse gas turbine through pipelines, and the electromagnetic valve is positioned at the air inlet end of the pulse detonation combustion chamber;
The pulse detonation combustion chamber sequentially comprises an air inlet section, a premixing section, a firing section and a detonation section from an air inlet to an air outlet, wherein the air inlet section is provided with a first oil sprayer, the air inlet of the air inlet section is connected with the air outlet of the electromagnetic valve through a pipeline, pneumatic valves are arranged at two ends of the premixing section, a gap for materials to pass through is reserved between each pneumatic valve and the inner wall of the premixing section, the firing section is provided with a spark plug, annular bosses are uniformly arranged on the inner walls of the premixing section and the detonation section along the axial direction, and the detonation section is provided with a second oil sprayer.
The three-way valve is arranged on a pipeline connected between the high-pressure-stage compressor exhaust port and the air inlet intercooler air inlet, one port of the three-way valve is connected with the high-pressure-stage compressor exhaust port, one port is connected with the air inlet intercooler air inlet, the other port is connected with the electromagnetic valve air inlet, and the electromagnetic valve air outlet is connected with the pulse detonation combustion chamber air inlet
The pulse detonation combustion chamber is made of an iron round tube.
The pneumatic valve is arranged by adopting an iron round table and is respectively welded on the inner walls at the two ends of the premixing section.
The electromagnetic valve, the bypass valve, the first oil sprayer, the second oil sprayer and the spark plug are all connected with the ECU, under different working conditions of engine operation, the opening and closing sizes of the electromagnetic valve and the bypass valve are adjusted through the ECU so as to control whether the pulse detonation combustion chamber is connected with work and the air inflow of the pulse detonation combustion chamber, and the oil spraying amount and the ignition moment are controlled through the ECU so as to change the detonation frequency and the power of pulse supercharging.
The aim of the invention can be achieved by the following technical scheme.
The invention discloses a control method of a two-stage series pulse combined supercharging device of a diesel engine, which comprises the following steps:
When the engine is in an idle state, the ECU controls the electromagnetic valve to be closed and the bypass valve to be opened; after being pressurized by an air filter, a bypass valve and a high-pressure-stage air compressor, the air enters the engine to participate in the combustion work of the engine directly through an air inlet intercooler and an air inlet header pipe, enters an exhaust header pipe through an exhaust valve, pushes an exhaust turbine to do work, and drives the high-pressure-stage air compressor to work;
When the engine is suddenly accelerated, the ECU controls the bypass valve to be closed and the electromagnetic valve to be opened; after the engine intake air is pressurized by an air filter, a low-pressure-stage compressor and a high-pressure-stage compressor, the engine intake air is divided into two paths at the rear side of the high-pressure-stage compressor: one path of gas directly enters an engine to participate in the combustion work of the engine through an air inlet intercooler and an air inlet main pipe, enters an exhaust main pipe through an exhaust valve, pushes an exhaust turbine to do work, and drives a high-pressure-stage compressor to work; the other path of gas enters the pulse detonation combustion chamber after passing through the electromagnetic valve controlled by the ECU, in the scavenging process in the pulse detonation combustion chamber, the ECU controls the first oil sprayer and the second oil sprayer of the pulse detonation combustion chamber to spray oil, mix with the air in the pulse detonation combustion chamber, and after the scavenging is completed, the ECU controls the spark plug in the pulse detonation combustion chamber to ignite, the mixed gas knocks and burns, and high-temperature and high-pressure gas is discharged to push the pulse gas turbine, and the pulse gas turbine rotates and drives the low-pressure-stage gas compressor.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects:
(1) The pulse detonation combustion chamber is connected between the exhaust port of the high-pressure-stage gas compressor and the air inlet of the pulse gas turbine, the pulse detonation combustion chamber has been developed on the basis of the advantages of high heat efficiency and high thrust-weight ratio, the pneumatic valve has the effect of greatly reducing the reverse transmission of detonation pressure, the obstacle of the premixing section has the effect of enhancing the oil-gas mixture, and the obstacle of the detonation section has the effect of promoting detonation.
(2) According to the invention, the low-pressure-stage air compressor is connected between the air inlet of the high-pressure-stage air compressor and the air outlet of the air filter, and is connected with the pulse gas turbine through the shaft, and the two-stage series pulse combined supercharging system can solve the problem of over-high back pressure during PCD scavenging.
(3) Because the pulse gas turbine and the low-pressure stage compressor do not need to run under partial working conditions, the invention installs bypass valves at two ends of the low-pressure stage compressor and is controlled by the ECU, and when the pulse detonation combustion chamber does not work, gas can bypass the low-pressure stage compressor, so that the air intake resistance is reduced.
Drawings
FIG. 1 is a T-S diagram of an ideal knock cycle versus an ideal isobaric cycle;
FIG. 2 is a schematic diagram of a two-stage series pulse combined supercharging device of a diesel engine according to the present invention;
FIG. 3 is a schematic diagram of a pulse detonation combustor in accordance with the present invention;
fig. 4 is a schematic diagram of compressor outlet pressure over time.
Reference numerals: 1-engine, 2-intake manifold, 3-exhaust manifold, 4-intake intercooler, 5-solenoid valve, 6-pulse detonation combustor, 601-intake section, 602-premixing section, 603-ignition section, 604-detonation section, 605-pneumatic valve, 7-high pressure stage compressor, 8-exhaust turbine, 9-pulse gas turbine, 10-low pressure stage compressor, 11-air filter, 12-bypass valve.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 2, the two-stage series pulse combined supercharging device of the diesel engine mainly comprises an engine 1, an air inlet intercooler 4, a pulse detonation combustion chamber 6, a high-pressure-stage compressor 7, an exhaust gas turbine 8, a pulse gas turbine 9, a low-pressure-stage compressor 10 and an air filter 11. The high-pressure stage compressor 7 and the exhaust turbine 8 are connected through a shaft. The exhaust port of the engine 1 is connected with the air inlet of the exhaust turbine 8 through the exhaust manifold 3, the air inlet of the engine 1 is connected with the air outlet of the air inlet intercooler 4 through the air inlet manifold 2, the air inlet of the air inlet intercooler 4 is connected with the air outlet of the high-pressure stage compressor 7 through a pipeline, the air inlet of the high-pressure stage compressor 7 is connected with the air outlet of the low-pressure stage compressor 10 through a pipeline, the air inlet of the low-pressure stage compressor 10 is connected with the air outlet of the air filter 11 through a pipeline, a bypass valve 12 is connected between the air inlet and the air outlet of the low-pressure stage compressor 10 through a pipeline, the pulse gas turbine 9 is connected with the air inlet of the pulse gas turbine 10 through a shaft, the electromagnetic valve 5 and the pulse detonation combustion chamber 6 are connected between the air outlet of the high-pressure stage compressor 7 and the air inlet of the pulse gas turbine 9 through a pipeline, and the electromagnetic valve 5 is positioned at the air inlet end of the pulse detonation combustion chamber 6.
The three-way valve is arranged on a pipeline connected between the exhaust port of the high-pressure stage compressor 7 and the air inlet of the air inlet intercooler 4, one port of the three-way valve is connected with the exhaust port of the high-pressure stage compressor 7, one port of the three-way valve is connected with the air inlet of the air inlet intercooler 4, the other port of the three-way valve is connected with the air inlet of the electromagnetic valve 5, and the air outlet of the electromagnetic valve 5 is connected with the air inlet of the pulse detonation combustion chamber 6.
Wherein, be provided with the tee bend on the pipeline of being connected between high pressure stage compressor 7 air inlet and the low pressure stage compressor 10 gas vent, this tee bend's one port is connected with high pressure stage compressor 7 air inlet, and one port is connected with low pressure stage compressor 10 gas vent, and another port is connected with bypass valve 12 gas vent.
Wherein, a tee joint is arranged on a pipeline connected between the air inlet of the low-pressure stage compressor 10 and the air outlet of the air filter 11, one port of the tee joint is connected with the air inlet of the low-pressure stage compressor 10, one port is connected with the air outlet of the air filter 11, and the other port is connected with the air inlet of the bypass valve 12.
As shown in fig. 3, the pulse detonation combustor 6 sequentially comprises an air inlet section 601, a premixing section 602, an ignition section 603 and a detonation section 604 from an air inlet to an air outlet, the air inlet section 601 is provided with a first oil sprayer, the air inlet of the air inlet section 601 is connected with an air outlet of the electromagnetic valve 5 through a pipeline, pneumatic valves 605 are arranged at two ends of the premixing section 602, gaps for materials to pass through are reserved between the pneumatic valves 605 and the inner wall of the premixing section 602, the ignition section 603 is provided with a spark plug, annular bosses are uniformly arranged on the inner walls of the premixing section 602 and the detonation section 604 along the axial direction, the detonation section 604 is provided with a second oil sprayer, and the blocking ratio of the detonation section 604 is 0.5. Wherein, the pulse detonation combustor 6 adopts an iron round tube. The pneumatic valve 605 is provided with an iron round table and is welded on the inner walls of the two ends of the premixing section 602 respectively. The control parameters of the pulse detonation combustor 6 are shown in table 1, and the PDC is injected in various modes, wherein the premixed injection is favorable for oil-gas mixing so as to facilitate detonation, and the direct injection in the cylinder is favorable for coupling control of oil injection time and ignition time, so that a large amount of fuel oil which only enters from an air inlet section is prevented from being difficult to enter the ignition section and the PDC completely in a short time, and thus cannot be combusted completely.
Control parameters of Table 1 PDC
The electromagnetic valve 5, the bypass valve 12, the first oil sprayer, the second oil sprayer and the spark plug are all connected with the ECU, under different working conditions of the engine 1, the opening and closing sizes of the electromagnetic valve 5 and the bypass valve 12 are adjusted through the ECU so as to control whether the pulse detonation combustion chamber 6 is connected with the work and the air inflow of the pulse detonation combustion chamber 6, and the knocking frequency and the power of pulse supercharging can be changed by controlling the oil spraying quantity and the ignition moment through the ECU.
The invention discloses a control method of a two-stage series pulse combined supercharging device of a diesel engine, which comprises the following steps:
In the idle state of the engine 1, the ECU controls the electromagnetic valve 5 to be closed and the bypass valve 12 to be opened, and the pulse detonation combustion chamber 6 is not used. After being supercharged by an air filter 11, a bypass valve 12 and a high-pressure-stage compressor 7, the air inlet of the engine 1 directly enters the engine 1 to participate in engine combustion work through an air inlet intercooler 4 and an air inlet manifold 2, enters an exhaust manifold 3 through an exhaust valve, pushes an exhaust turbine 8 to work, and drives the high-pressure-stage compressor 7 to work.
The pulse detonation combustion chamber 6 is connected in the event of sudden acceleration of the engine, with the engine running in an idle state as an initial state, and the supercharging response speed and the supercharging pressure ratio thereof are discussed. The initial state parameters of the engine 1 are shown in table 2.
TABLE 2 Engine initial State parameters
When the engine 1 is suddenly accelerated, the pulse detonation combustion chamber 6 is connected, the working mode of the pulse detonation combustion chamber 6 is a cyclic pulse, and three processes of gas mixture filling, ignition detonation and detonation gas discharging are divided into each cycle of the pulse. In the mixed gas filling stage, the ECU controls the electromagnetic valve 5 at the air inlet end of the pulse detonation combustion chamber 6 to be opened, and part of air behind the high-pressure-stage compressor 7 enters the pulse detonation combustion chamber 6 to perform scavenging, so that residual waste gas in the pulse detonation combustion chamber 6 is pushed away. In the process of scavenging in the pulse detonation combustion chamber 6, the ECU controls the first oil injector and the second oil injector of the pulse detonation combustion chamber 6 to inject oil and mix with air in the pulse detonation combustion chamber 6. In the ignition initiation phase, the ECU controls the ignition of the spark plug inside the pulse detonation combustion chamber 6, and the mixture undergoes detonation combustion. In the detonation gas discharge stage, detonation combustion generates high-temperature and high-pressure gas and rapidly discharges and pushes the pulse gas turbine 9, and the pulse gas turbine 9 rotates and drives the low-pressure stage compressor 10 to do work.
When the engine 1 suddenly accelerates, the power of the engine 1 suddenly increases, the ECU determines that the intake pressure needs to be increased to increase the intake air flow rate, and at this time, the ECU controls the bypass valve 12 to be closed and the solenoid valve 5 to be opened. After the air inlet of the engine 1 is pressurized by the air filter 11, the low-pressure stage compressor 10 and the high-pressure stage compressor 7, the air inlet is divided into two paths at the rear side of the high-pressure stage compressor 7: one path of gas directly enters the engine 1 to participate in engine combustion work through the air inlet intercooler 4 and the air inlet main pipe 2, enters the exhaust main pipe 3 through the exhaust valve, pushes the exhaust turbine 8 to do work, and drives the high-pressure compressor 7 to work; the other path of gas enters the pulse detonation combustion chamber 6 after passing through the electromagnetic valve 5 controlled by the ECU, in the process of scavenging in the pulse detonation combustion chamber 6, the ECU controls the first oil injector and the second oil injector of the pulse detonation combustion chamber 6 to inject oil, mix with air in the pulse detonation combustion chamber 6, and after scavenging is completed, the ECU controls the spark plug in the pulse detonation combustion chamber 6 to ignite, the mixed gas knocks and combusts and discharges high-temperature high-pressure gas to push the pulse gas turbine 9, and the pulse gas turbine 9 rotates and drives the low-pressure compressor 10. The high-pressure stage compressor 7 and the low-pressure stage compressor 10 work together, are pushed by using two waste gas energies, and are further pressurized in a combined way.
Simulation was performed using GT-Power, with pulse detonation combustor 6 entering and beginning continuous operation at 5 seconds. At this time, the intake pressure of the engine 1 is rapidly increased, the outlet pressure of the low-pressure stage compressor 10 and the outlet pressure of the high-pressure stage compressor 7 are as shown in fig. 4, it is known that the pulse boosting is started at 5 seconds, the PDC starts to intake, the pressure of the two-stage compressor outlet is reduced, the pulse boosting starts to output at 7 seconds, the pressure of the two-stage compressor outlet is risen, and the outlet pressure of the high-pressure stage compressor is stabilized at 2.8bar at 9 seconds.
Although the function and operation of the present invention has been described above with reference to the accompanying drawings, the present invention is not limited to the above-described specific functions and operations, but the above-described specific embodiments are merely illustrative, not restrictive, and many forms can be made by those having ordinary skill in the art without departing from the spirit of the present invention and the scope of the appended claims, which are included in the protection of the present invention.
Claims (3)
1. The two-stage series pulse combined supercharging device of the diesel engine comprises an engine (1), an air inlet intercooler (4), a high-pressure stage air compressor (7), an exhaust gas turbine (8) and an air filter (11), wherein an air inlet of the engine (1) is connected with an air outlet of the air inlet intercooler (4) through an air inlet main pipe (2), an air inlet of the air inlet intercooler (4) is connected with an air outlet of the high-pressure stage air compressor (7) through a pipeline, an air inlet of the high-pressure stage air compressor (7) is connected with an air outlet of the air filter (11) through a pipeline, an air outlet of the engine (1) is connected with an air inlet of the exhaust gas turbine (8) through an air outlet main pipe (3), and is characterized in that a low-pressure stage air compressor (10) is connected between an air inlet of the high-pressure stage air compressor (7) and an air outlet of the air filter (11) through a pipeline, a bypass valve (12) is connected between the air inlet of the low-pressure stage air compressor (10) and the air outlet through a pipeline, the low-pressure stage air compressor (10) is connected with a pulse gas turbine (9) through a shaft, the air outlet of the high-pressure stage air compressor (7) is connected with an air outlet of the air filter (11) through a pipeline, the air outlet of the high-pressure stage air compressor (7) is connected with an air inlet (5) and the pulse combustion chamber (6) through an electromagnetic valve (5) and the pulse combustion chamber (6);
The pulse detonation combustor comprises a pulse detonation combustion chamber (6), wherein the pulse detonation combustion chamber is sequentially provided with an air inlet section (601), a premixing section (602), an ignition section (603) and a detonation section (604) from an air inlet to an air outlet, the air inlet section (601) is provided with a first oil sprayer, the air inlet of the air inlet section (601) is connected with the air outlet of an electromagnetic valve (5) through a pipeline, two ends of the premixing section (602) are respectively provided with a pneumatic valve (605), a gap for materials to pass through is reserved between the pneumatic valves (605) and the inner wall of the premixing section (602), the ignition section (603) is provided with a spark plug, annular bosses are uniformly arranged on the inner walls of the premixing section (602) and the detonation section (604) along the axial direction, and the detonation section (604) is provided with a second oil sprayer;
The electromagnetic valve (5), the bypass valve (12), the first oil sprayer, the second oil sprayer and the spark plug are all connected with the ECU, under different working conditions of the operation of the engine (1), the opening and closing of the bypass valve (12) of the electromagnetic valve (5) are adjusted through the ECU so as to control whether the pulse detonation combustion chamber (6) is connected with the work and the air inflow of the pulse detonation combustion chamber (6), and the oil spraying quantity and the ignition moment are controlled through the ECU so as to change the detonation frequency and the power of the pulse supercharging.
2. The two-stage series pulse combined supercharging device for the diesel engine according to claim 1, wherein a tee joint is arranged on a pipeline connected between an exhaust port of the high-pressure stage compressor (7) and an air inlet of the air inlet intercooler (4), one port of the tee joint is connected with the exhaust port of the high-pressure stage compressor (7), one port of the tee joint is connected with the air inlet of the air inlet intercooler (4), the other port of the tee joint is connected with an air inlet of the electromagnetic valve (5), and the air outlet of the electromagnetic valve (5) is connected with the air inlet of the pulse detonation combustion chamber (6).
3. A method of controlling a two-stage series pulse combined supercharging device for a diesel engine as claimed in any one of claims 1 or 2, comprising the steps of:
When the engine (1) is in an idle state, the ECU controls the electromagnetic valve (5) to be closed, and the bypass valve (12) to be opened; after the air inlet of the engine (1) is pressurized through an air filter (11), a bypass valve (12) and a high-pressure compressor (7), the air directly enters the engine (1) to participate in the combustion work of the engine through an air inlet intercooler (4) and an air inlet main pipe (2), enters an exhaust main pipe (3) through an exhaust valve, pushes an exhaust turbine (8) to do work, and drives the high-pressure compressor (7) to work;
When the engine (1) is suddenly accelerated, the ECU controls the bypass valve (12) to be closed, and the electromagnetic valve (5) to be opened; after the air inlet of the engine (1) is pressurized by an air filter (11), a low-pressure-stage air compressor (10) and a high-pressure-stage air compressor (7), the air inlet is divided into two paths at the rear side of the high-pressure-stage air compressor (7): one path of gas directly enters the engine (1) to participate in the combustion work of the engine (1) through the air inlet intercooler (4) and the air inlet main pipe (2), enters the exhaust main pipe (3) through the exhaust valve, pushes the exhaust turbine (8) to work, and drives the high-pressure compressor (7) to work; the other path of gas enters the pulse detonation combustion chamber (6) after passing through the electromagnetic valve (5) controlled by the ECU, in the scavenging process in the pulse detonation combustion chamber (6), the ECU controls the first oil injector and the second oil injector of the pulse detonation combustion chamber (6) to inject oil, mix with air in the pulse detonation combustion chamber (6), and after scavenging is completed, the ECU controls the spark plug in the pulse detonation combustion chamber (6) to ignite, the mixed gas knocks and burns and discharges high-temperature high-pressure gas to push the pulse gas turbine (9), and the pulse gas turbine (9) rotates and drives the low-pressure stage compressor (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111374735.7A CN114060141B (en) | 2021-11-19 | 2021-11-19 | Two-stage series pulse combined supercharging device of diesel engine and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111374735.7A CN114060141B (en) | 2021-11-19 | 2021-11-19 | Two-stage series pulse combined supercharging device of diesel engine and control method thereof |
Publications (2)
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| DE202015102241U1 (en) * | 2015-04-24 | 2015-06-01 | Ford Global Technologies, Llc | Two-stage rechargeable internal combustion engine with exhaust aftertreatment |
| DE102015207545A1 (en) * | 2015-04-24 | 2016-10-27 | Ford Global Technologies, Llc | Two-stage rechargeable internal combustion engine with exhaust aftertreatment and method for operating such an internal combustion engine |
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| CH262376A (en) * | 1946-04-06 | 1949-06-30 | Nettel Frederick | Method for operating piston internal combustion engines and device for carrying out this method. |
| EP1962046A1 (en) * | 2007-02-22 | 2008-08-27 | General Electric Company | Pulse detonation combustor cleaning device and method of operation |
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| DE202015102241U1 (en) * | 2015-04-24 | 2015-06-01 | Ford Global Technologies, Llc | Two-stage rechargeable internal combustion engine with exhaust aftertreatment |
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