CN203560008U - Exhaust gas recirculation system for diesel engine - Google Patents
Exhaust gas recirculation system for diesel engine Download PDFInfo
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- CN203560008U CN203560008U CN201320598133.4U CN201320598133U CN203560008U CN 203560008 U CN203560008 U CN 203560008U CN 201320598133 U CN201320598133 U CN 201320598133U CN 203560008 U CN203560008 U CN 203560008U
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- exhaust gas
- egr
- air filter
- air
- diesel engine
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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
The utility model discloses an exhaust gas recirculation system for a diesel engine, which is used for overcoming adverse effects on the diesel engine performance, caused by a conventional diesel engine exhaust gas recirculation system. The exhaust gas recirculation system comprises an exhaust manifold, a supercharger, an oxidation catalyst, a diesel particle catcher, an EGR (exhaust gas recirculation) valve, an EGR cooler, an air filter and an air intake manifold, wherein the supercharger is an exhaust gas turbo-supercharger equipped with a supercharger turbine motor and a supercharge gas compressor; the exhaust manifold, the supercharger turbine motor, the oxidation catalyst and the diesel particle catcher are connected onto an exhaust pipeline of the diesel engine in sequence. The exhaust gas recirculation system is characterized in that the EGR valve and the EGR cooler are connected in series between the diesel particle catcher and the air filter, an EGR air inlet is additionally formed in the air filter, and an air outlet of the EGR cooler is communicated with the EGR air inlet of the air filter. According to the utility model, the air snatch phenomenon with the supercharger can be avoided, and the particles in the exhaust gas can be further removed, so as to prolong the working life of the diesel engine.
Description
Technical field
The utility model relates to a kind of engine exhaust-gas recirculating system, and especially a kind of gas recirculation system of vehicle-mounted diesel engine, belongs to technical field of internal combustion engines.
Background technique
Along with the continuous increase of Global Auto recoverable amount, the atmosphere polluting problem that vehicle exhaust brings becomes increasingly conspicuous, so the Abgasgesetz of countries in the world is also more and more stricter.For meeting the requirement of automotive energy-saving emission-reducing, engines exhaust gas recirculation (being EGR) system has become the mainstream configuration of Hyundai Motor, its working principle is to send a part for engine exhaust back to cylinder again, utilize the inertia retarded combustion process of EGR gas, destroy the high-temperature oxygen-enriched environment that Nox generates, thereby reach the object that reduces Nox discharge amount.
The gas mode of getting of diesel engine egr system has two kinds at present, and the one, high pressure egr system as shown in Figure 1, gets gas its gas exhaust piping before pressurized machine 9, and the house steward of waste gas and the air intake manifold 10 after closure locates to mix; The 2nd, low pressure EGR system as shown in Figure 2, its diesel particulate trap (being DPF) after being positioned at charger turbine is got gas below, and EGR outlet is connected in the air inlet pipeline before pressurized machine 9 gas compressor 9-1.Because exhausted air quantity in high pressure egr system can strengthen along with emissions requirements, the raising of waste gas circulation utilization ratio causes more waste gas before pressurized machine 9, to be introduced into air inlet manifold 10, the exhausted air quantity that pressurized machine 9 is utilized reduces, can not meet engine charge supercharging requirement, and the particulate matter in high pressure EGR waste gas and imperfect combustion product easily cause air inlet pipeline to block and the inordinate wear of cylinder, have shortened engine life; Low pressure EGR system is to get gas from DPF rear end, waste gas is after driving charger turbine work done, its pressure significantly reduces, for reducing engine exhaust system back pressure, being arranged on charger turbine DPF filtering effect is afterwards weakened, therefore enter and residually in the waste gas of supercharger air compressor compared with small particle, can bring impact to the aluminum blade of supercharger air compressor, cause adverse effect to motor overall performance.
Model utility content
The purpose of this utility model is the drawback for prior art, provides a kind of can avoiding to rob the generation of gas phenomenon with pressurized machine, can solve again particulate matter in waste gas and motor overall performance be caused to the diesel engine exhaust gas recirculation system of adverse effect problem.
Problem described in the utility model realizes with following technical proposals:
A kind of diesel engine exhaust gas recirculation system, it comprises gas exhaust manifold, pressurized machine, oxidation catalyzer, diesel particulate trap, EGR valve, cooler for recycled exhaust gas, air filter and intake manifold, described pressurized machine is the exhaust-gas turbocharger that is provided with charger turbine and supercharger air compressor, described gas exhaust manifold, pressurized machine worm gear machine, oxidation catalyzer and diesel particulate trap are connected in turn on waste pipe road, its specialization is: described EGR valve and cooler for recycled exhaust gas are connected between diesel particulate trap and air filter, described air filter is set up EGR suction port, cooler for recycled exhaust gas air outlet is communicated with the EGR suction port of air filter.
Above-mentioned diesel engine exhaust gas recirculation system, described air filter is provided with filter screen at EGR suction port place.
Above-mentioned diesel engine exhaust gas recirculation system, the EGR suction port of described air filter is communicated with fresh air inlet, and they are positioned at the below of cleaner cartridge cleaner, and air filter air outlet is set above cleaner cartridge cleaner.
Above-mentioned diesel engine exhaust gas recirculation system, the air outlet of described air filter is communicated with supercharger air compressor suction port, and described supercharger air compressor air outlet is communicated with intake manifold.
Above-mentioned diesel engine exhaust gas recirculation system, the flow route of EGR gas is: engine cylinder cover → gas exhaust manifold → charger turbine → oxidation catalyzer → diesel particulate trap → EGR valve → cooler for recycled exhaust gas → air filter → supercharger air compressor → intake manifold → engine cylinder cover.
In the utility model, engine exhaust is after driving charger turbine work done, pass through again the processing of oxidation catalyzer and diesel particulate trap, not only its temperature and pressure significantly reduce, and in waste gas, larger particles material is removed, therefore EGR valve had both overcome with pressurized machine and had robbed gas phenomenon from getting gas after diesel particulate trap, reduced again and again participated in the exhaust gas temperature of burning, again after air filter EGR suction port place filter screen filters, in waste gas, particulate matter is further removed, alleviated the impact of waste gas to supercharger air compressor blade, improved the overall performance of motor.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Fig. 1 is existing diesel engine high pressure egr system waste gas streams path line chart;
Fig. 2 is existing diesel engine low pressure EGR system waste gas streams path line chart;
Fig. 3 is waste gas streams path line chart of the present utility model;
Fig. 4 is air filter structural representation of the present utility model.
In figure, each list of reference numerals is: 1, engine cylinder cover, 2, gas exhaust manifold, 3, oxidation catalyzer, 4, diesel particulate trap, 5, EGR valve, 6, cooler for recycled exhaust gas, 7, air filter, 7-1, EGR suction port, 7-2, fresh air inlet, 7-3, air filter air outlet, 7-4, cleaner cartridge cleaner, 7-5, filter screen, 8, engine charge pipeline, 9, pressurized machine, 9-1, pressurized machine worm gear machine, 9-2, supercharger air compressor, 10, intake manifold.
Embodiment
Referring to Fig. 3, the utility model comprises gas exhaust manifold 2, pressurized machine 9, oxidation catalyzer 3, diesel particulate trap 4, EGR valve 5, cooler for recycled exhaust gas 6, air filter 7 and intake manifold 10, described pressurized machine 9 is for being provided with the exhaust-gas turbocharger of charger turbine 9-1 and supercharger air compressor 9-2, described gas exhaust manifold 2, pressurized machine worm gear machine 9-1, oxidation catalyzer 3 and diesel particulate trap 4 are connected in turn on waste pipe road, and described EGR valve 5 and cooler for recycled exhaust gas 6 are connected between diesel particulate trap 4 and air filter 7; The flow route of EGR gas is: engine cylinder cover 1 → gas exhaust manifold 2 → charger turbine 9-1 → oxidation catalyzer 3 → diesel particulate trap 4 → EGR valve 5 → cooler for recycled exhaust gas 6 → air filter 7 → supercharger air compressor 9-2 → intake manifold 10 → engine cylinder cover 1; Fresh air enters the air filter fresh air inlet 7-2 of air filter 7 through admission line 8, after cleaner cartridge cleaner 7-4 filters, enter supercharging in supercharger air compressor 9-2 together with EGR gas, the fresh air after supercharging and the mixed gas of EGR gas enter engine chamber through intake manifold 10.
Referring to Fig. 4, air filter 7 of the present utility model is set up EGR suction port 7-1, the air outlet of cooler for recycled exhaust gas 6 is communicated with the EGR suction port 7-1 of air filter 7, described EGR suction port 7-1 place is provided with filter screen 7-5, EGR suction port 7-1 is communicated with the fresh air inlet 7-2 of air filter 7, they are positioned at the below of cleaner cartridge cleaner 7-4, air filter air outlet 7-3 is set above cleaner cartridge cleaner 7-4, described air filter air outlet 7-3 is communicated with the suction port of supercharger air compressor 9-2, and the air outlet of described supercharger air compressor 9-2 is communicated with intake manifold 10.
Referring to Fig. 3, Fig. 4, in the utility model, engine exhaust is after driving charger turbine 9-1 work done, pass through again the processing of oxidation catalyzer 3 and diesel particulate trap 4, not only its temperature and pressure significantly reduce, and in waste gas, larger particles material is removed, therefore EGR valve 5 is got gas below from diesel particulate trap 4 and had both been overcome with pressurized machine 9 and rob gas phenomenon, reduced again and again participated in the exhaust gas temperature of burning, also reduced total intake temperature simultaneously, improved oil inflame efficiency, further destroy Nox and generated the high-temperature oxygen-enriched environment relying on, be conducive to the improvement of motor emission performance, enter the waste gas of egr system again after the EGR of the air filter 7 suction port 7-1 filter screen 7-4 of place filters, in waste gas, particulate matter is further removed, not only alleviated the impact of waste gas to supercharger air compressor 7-2 blade, also reduced the pollution to the gentle cylinder of engine charge pipeline, improve motor overall performance, extended the operating life of motor.
Claims (5)
1. a diesel engine exhaust gas recirculation system, it comprises gas exhaust manifold (2), pressurized machine (9), oxidation catalyzer (3), diesel particulate trap (4), EGR valve (5), cooler for recycled exhaust gas (6), air filter (7) and intake manifold (10), described pressurized machine (9) is for being provided with the exhaust-gas turbocharger of charger turbine (9-1) and supercharger air compressor (9-2), described gas exhaust manifold (2), pressurized machine worm gear machine (9-1), oxidation catalyzer (3) and diesel particulate trap (4) are connected in turn on waste pipe road, it is characterized in that, described EGR valve (5) and cooler for recycled exhaust gas (6) are connected between diesel particulate trap (4) and air filter (7), described air filter (7) is set up EGR suction port (7-1), the air outlet of cooler for recycled exhaust gas (6) is communicated with the EGR suction port (7-1) of air filter (7).
2. a kind of diesel engine exhaust gas recirculation system according to claim 1, is characterized in that, described air filter (7) locates to be provided with filter screen (7-5) at EGR suction port (7-1).
3. a kind of diesel engine exhaust gas recirculation system according to claim 2, it is characterized in that, the EGR suction port (7-1) of described air filter (7) is communicated with the fresh air inlet (7-2) of air filter (7), they are positioned at the below of cleaner cartridge cleaner (7-4), in cleaner cartridge cleaner (7-4) top, air filter air outlet (7-3) are set.
4. a kind of diesel engine exhaust gas recirculation system according to claim 3, it is characterized in that, described air filter air outlet (7-3) is communicated with the suction port of supercharger air compressor (9-2), and the air outlet of described supercharger air compressor (9-2) is communicated with intake manifold (10).
5. a kind of diesel engine exhaust gas recirculation system according to claim 4, it is characterized in that, the flow route of EGR gas is: engine cylinder cover (1)--gas exhaust manifold (2)--charger turbine (9-1)--oxidation catalyzer (3)--diesel particulate trap (4)--EGR valve (5)--cooler for recycled exhaust gas (6)--air filter (7)--supercharger air compressor (9-2)--intake manifold (10)--engine cylinder cover (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320598133.4U CN203560008U (en) | 2013-09-27 | 2013-09-27 | Exhaust gas recirculation system for diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320598133.4U CN203560008U (en) | 2013-09-27 | 2013-09-27 | Exhaust gas recirculation system for diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203560008U true CN203560008U (en) | 2014-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320598133.4U Expired - Lifetime CN203560008U (en) | 2013-09-27 | 2013-09-27 | Exhaust gas recirculation system for diesel engine |
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| Country | Link |
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| CN (1) | CN203560008U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110486199A (en) * | 2019-09-17 | 2019-11-22 | 广东工业大学 | A kind of gas recirculation system of engine |
| CN113202603A (en) * | 2021-05-10 | 2021-08-03 | 第一拖拉机股份有限公司 | Tail gas processing apparatus who takes tail gas preliminary treatment for non-road diesel engine |
-
2013
- 2013-09-27 CN CN201320598133.4U patent/CN203560008U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110486199A (en) * | 2019-09-17 | 2019-11-22 | 广东工业大学 | A kind of gas recirculation system of engine |
| CN113202603A (en) * | 2021-05-10 | 2021-08-03 | 第一拖拉机股份有限公司 | Tail gas processing apparatus who takes tail gas preliminary treatment for non-road diesel engine |
| CN113202603B (en) * | 2021-05-10 | 2022-06-14 | 第一拖拉机股份有限公司 | Tail gas processing apparatus who takes tail gas preliminary treatment for non-road diesel engine |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140423 |