CN209293909U - Electric supercharging diesel engine system for realizing Miller cycle - Google Patents
Electric supercharging diesel engine system for realizing Miller cycle Download PDFInfo
- Publication number
- CN209293909U CN209293909U CN201821772847.1U CN201821772847U CN209293909U CN 209293909 U CN209293909 U CN 209293909U CN 201821772847 U CN201821772847 U CN 201821772847U CN 209293909 U CN209293909 U CN 209293909U
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- compressor
- cylinder
- turbocharger
- miller cycle
- diesel engine
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- 239000000446 fuel Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 239000002283 diesel fuel Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
Classifications
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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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Abstract
A diesel engine system for realizing Miller cycle by electric supercharging comprises a turbocharger (1), a throttle valve (6) and a cylinder (7), wherein an air inlet pipe of the cylinder (7) is connected with a compressor of the turbocharger (1), an intercooler (5) is arranged on the air inlet pipe of the cylinder (7), an electric supercharger is arranged on the air inlet pipe of the cylinder (7) between the intercooler (5) and the compressor of the turbocharger (1), and a bypass valve (4) is connected in parallel with the electric supercharger; the electric supercharger comprises a gas compressor (2) and a motor (3), the gas compressor (2) is respectively connected with an intercooler (5) and a compressor of the turbocharger (1), and the motor (3) is connected with the gas compressor (2). The requirement of a large-load working condition on air intake charge is met, and the torque of low rotating speed is improved; the electric supercharger is flexible to control and quick in response, and the power performance of the Miller cycle diesel engine is effectively improved while the fuel economy is improved.
Description
Technical field
The utility model relates to a kind of diesel engine system, more specifically to a kind of electronic pressurization realizes that Miller follows
Ring diesel engine system, belongs to technical field of internal combustion engines.
Background technique
Currently, promoting diesel engine that must further promote cycle efficieny with diesel engine energy consumption and emission regulation plus tight.
Existing Miller cycle diesel engine is closed by inlet valve morning pass/evening, and diesel engine expansion ratio is made to be greater than compression ratio, realizes that the thermal efficiency mentions
It rises, mainly includes following two technical solution:
First, high pressure-charging+miller cycle engine using high supercharging pressure level turbocharger 1, improves big load referring to fig. 4
When power output, air inlet use slow enclosed Miller cycle, by VVT system make inlet valve postpone close, reduce combustion chamber in
Actual compression ratio.But the technical solution influences original machine dynamic property in Part load deficiency of air.
Second, double pressurization+miller cycle engines, referring to Fig. 5, the rudimentary turbocharger of the small inertia of the first order is mentioned
High low speed torque output, solves the problems, such as that 7 low speed power of engine is insufficient；The second level uses general advanced turbocharger,
This cooperation the higher boost pressure of output, raising 7 efficiency of engine can be realized fast in entire 7 range of speeds of engine
Speed response.But the technical solution flexibility is insufficient.
Summary of the invention
The purpose of this utility model is that realizing that thermal efficiency lift technique scheme is deposited for existing Miller cycle diesel engine
Part load deficiency of air or the problems such as insufficient flexibility, a kind of electronic pressurization is provided and realizes Miller cycle diesel oil
Engine system.
To achieve the above object, the technical solution of the utility model is: a kind of electronic pressurization realization Miller cycle bavin
Oil turbine system, including turbocharger, air throttle, cylinder, the air throttle are mounted on the inlet manifold front end of cylinder,
The air inlet pipe of the cylinder and the compressor of turbocharger connect, and are provided with intercooler, the exhaust of cylinder on cylinder intake pipe
Pipe is connect with the turbine of turbocharger, is connected with exhaust gas by-pass valve between the turbine inlet and outlet of turbocharger,
Be provided with electric booster on cylinder intake pipe between the intercooler and the compressor of turbocharger, and with electronic pressurization
Device is parallel with by-passing valve.
The electric booster includes compressor and motor, the compressor respectively with intercooler and turbocharger
Compressor connection, the motor connects with compressor.
Compared with prior art, the beneficial effects of the utility model are:
1, the utility model uses electronic pressurization+Miller cycle, increases air inflow.
2, low engine speed dynamic property is improved by electric booster.
3, the thermal efficiency and fuel economy are promoted by Miller cycle.
Detailed description of the invention
Fig. 1 is the utility model structure diagram.
Fig. 2 is that the utility model inlet valve early closes Miller cycle indicator card.
Fig. 3 is to close Miller cycle indicator card in the utility model inlet valve evening.
Fig. 4 is existing high pressure-charging+miller cycle engine structural schematic diagram.
Fig. 5 is existing double pressurizations+miller cycle engine structural schematic diagram.
In figure: turbocharger 1, compressor 2, motor 3, by-passing valve 4, intercooler 5, air throttle 6, cylinder 7, exhaust gas valve 8,
Engine 9, low-pressure stage compressor 10, lower pressure stage turbine 11, hiigh pressure stage compressor 12, hiigh pressure stage turbine 13, vent valve 14.
Specific embodiment
The utility model is described in further detail below in conjunction with Detailed description of the invention and specific embodiment.
Referring to Fig. 1, a kind of electronic pressurization realization Miller cycle diesel engine system, including turbocharger 1, air throttle
6, cylinder 7.The air throttle 6 is mounted on the inlet manifold front end of cylinder 7, the air inlet pipe and turbocharger 1 of the cylinder 7
Compressor connection, be provided with intercooler 5 in 7 air inlet pipe of cylinder；The exhaust pipe of cylinder 7 and the turbine of turbocharger 1 connect
It connects, is connected with exhaust gas by-pass valve 8 between the turbine inlet and outlet of turbocharger 1.The intercooler 5 and turbocharger
Be provided with electric booster in 7 air inlet pipe of cylinder between 1 compressor, and intercooler 5 and the compressor of turbocharger 1 it
Between 7 air inlet pipe of cylinder on electric booster be parallel with by-passing valve 4.
Referring to Fig. 1, specifically, the electric booster includes compressor 2 and motor 3, the compressor 2 respectively with
Intercooler 5 is connected with the compressor of turbocharger 1, and the motor 3 and compressor 2 connect.
Referring to Fig. 1 to Fig. 3, this system compresses air inlet using electric booster, and compensation is because of inlet valve lift and opens
The loss of inlet flow caused by the reduction of angle is opened, meets requirement of the high load working condition to charge, promotes the torsion of the slow-speed of revolution
Square；And electric booster control is flexible, response is rapid, while promoting fuel economy, effectively improves Miller cycle diesel oil
The dynamic property of machine.This system specific work process is as follows: when electric booster works, by-passing valve 4 is closed, electric booster and whirlpool
It takes turns booster 1 and forms tandem working system, diesel engine intake process is pressurized, increase air inflow；High temperature and pressure air inlet warp
It crosses intercooler 5 to be cooled down, subsequently enters air throttle 6 and generate throttling refrigeration effect, subsequently enter cylinder 7, inlet valve morning pass/evening
It closes, realizes that stroke expansion ratio is greater than the effect of compression ratio, realize Miller cycle.
It, cannot the above content is specific preferred embodiment further detailed description of the utility model is combined
Assert that the specific implementation of the utility model is only limited to these instructions.For the ordinary skill of the utility model technical field
For personnel, without departing from the concept of the premise utility, a number of simple deductions or replacements can also be made, above structure
It all shall be regarded as belonging to the protection scope of the utility model.
Claims (2)
1. Miller cycle diesel engine system, including turbocharger (1), air throttle (6), cylinder are realized in a kind of electronic pressurization
(7), the air throttle (6) is mounted on the inlet manifold front end of cylinder (7), the air inlet pipe and turbocharging of the cylinder (7)
The compressor of device (1) connects, and is provided with intercooler (5) in cylinder (7) air inlet pipe, the exhaust pipe and turbocharger of cylinder (7)
(1) turbine connection, is connected with exhaust gas by-pass valve (8), feature between the turbine inlet and outlet of turbocharger (1)
It is: is provided with electronic pressurization in cylinder (7) air inlet pipe between the intercooler (5) and the compressor of turbocharger (1)
Device, and by-passing valve (4) are parallel with electric booster.
2. Miller cycle diesel engine system is realized in a kind of electronic pressurization according to claim 1, it is characterised in that: institute
The electric booster stated includes compressor (2) and motor (3), the compressor (2) respectively with intercooler (5) and turbocharging
The compressor of device (1) connects, the motor (3) and compressor (2) connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821772847.1U CN209293909U (en) | 2018-10-30 | 2018-10-30 | Electric supercharging diesel engine system for realizing Miller cycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821772847.1U CN209293909U (en) | 2018-10-30 | 2018-10-30 | Electric supercharging diesel engine system for realizing Miller cycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209293909U true CN209293909U (en) | 2019-08-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821772847.1U Active CN209293909U (en) | 2018-10-30 | 2018-10-30 | Electric supercharging diesel engine system for realizing Miller cycle |
Country Status (1)
| Country | Link |
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| CN (1) | CN209293909U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109372628A (en) * | 2018-10-30 | 2019-02-22 | 东风商用车有限公司 | Electric supercharging diesel engine system for realizing Miller cycle |
-
2018
- 2018-10-30 CN CN201821772847.1U patent/CN209293909U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109372628A (en) * | 2018-10-30 | 2019-02-22 | 东风商用车有限公司 | Electric supercharging diesel engine system for realizing Miller cycle |
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