CN107939558A - A kind of internal combustion engine exhaust system with exhaust gas recycling - Google Patents
A kind of internal combustion engine exhaust system with exhaust gas recycling Download PDFInfo
- Publication number
- CN107939558A CN107939558A CN201710928487.3A CN201710928487A CN107939558A CN 107939558 A CN107939558 A CN 107939558A CN 201710928487 A CN201710928487 A CN 201710928487A CN 107939558 A CN107939558 A CN 107939558A
- Authority
- CN
- China
- Prior art keywords
- exhaust
- turbine
- volute chamber
- turbine volute
- manifold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
- F02M26/05—High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/30—Exhaust heads, chambers, or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
- F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
- F01N13/107—More than one exhaust manifold or exhaust collector
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas- turbine plants for special use
- F02C6/04—Gas-turbine plants providing heated or pressurised working fluid for other apparatus, e.g. without mechanical power output
- F02C6/10—Gas-turbine plants providing heated or pressurised working fluid for other apparatus, e.g. without mechanical power output supplying working fluid to a user, e.g. a chemical process, which returns working fluid to a turbine of the plant
- F02C6/12—Turbochargers, i.e. plants for augmenting mechanical power output of internal-combustion piston engines by increase of charge pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
- F02M26/16—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system with EGR valves located at or near the connection to the exhaust system
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
The invention discloses it is a kind of with exhaust gas recycling internal combustion engine exhaust system, including multiple cylinders, exhaust manifold, EGR valve, cooler for recycled exhaust gas, inlet manifold, turbine, supercharger air compressor, intercooler and in it is cold after air inlet pipe；It is characterized in that：Multiple cylinder packets connect the more exhaust manifolds respectively；There are the turbine multiple turbine volute chambers to lead to turbine wheel；The more exhaust manifolds respectively enter corresponding multiple turbine volute chambers；At least partly described exhaust manifold is connected with the EGR valve at the same time.It is more advantageous to reducing between each cylinder is vented the beneficial effects of the present invention are three runner spiral casing of pressure booster and exhaust manifold arrangement and disturbs, using exhaust pulses effect, easy to the holding of exhaust energy.Beneficial effects of the present invention also reside in three runner spiral casing of pressure booster and are provided with different cross-sectional volute chamber, can form the spiral case asymmetric degree of different gradients, optimize easy to EGR rate under Different Work Condition of Engine.
Description
Technical field
The invention belongs to turbocharging internal-combustion engines technical field, more particularly to a kind of using asymmetric turbocharger
Internal combustion engine exhaust system with exhaust gas recycling.
Background technology
It is engine by asymmetric turbocharger, EGR valve and associated discharge system to meet engine emission requirements
Appropriate EGR rate is provided.
The solution that presently, there are is mainly patent CN104508284 (A) disclosure of that, that is, passes through asymmetric double
Runner booster and the EGR valve, meet EGR rate requirement under Different Work Condition of Engine by controlling EGR valve.Its deficiency
It is in when turbine volute case asymmetric degree is larger, it is difficult to produce big exhaust gas pressure, can only be expired by forcing EGR valve
Sufficient EGR rate requirement.And asymmetric degree it is smaller when, it is higher in the big load of high speed, exhaust back pressure, excessive EGR rate will be produced.
Daimler companies tend to use larger asymmetric degree, meet that EGR rate will by forcing EGR valve in Part load
Ask.
The major defect of the program is：1）Three cylinders share a spiral case grate flow channel so that exhaust energy dissipates between each cylinder
It is more.2）Force EGR valve directly to bear high-temperature exhaust air to wash away, bring higher thermic load, reliability is poor.In addition, force EGR
Valve also brings the loss of exhaust energy.
The content of the invention
Followed again it is an object of the invention to provide a kind of turbocharger and using the band exhaust gas of asymmetric turbocharger
The internal combustion engine exhaust system of ring, while engine EGR rate is met, improves turbocharger exhaust energy utilization as far as possible
Rate.
The present invention to achieve the above object, adopts the following technical scheme that：
A kind of internal combustion engine exhaust system with exhaust gas recycling, including multiple cylinders, exhaust manifold, EGR valve, EGR are cold
But device, inlet manifold, turbine, supercharger air compressor, intercooler and in it is cold after air inlet pipe；The row of the cylinder
Gas enters the turbine through the exhaust manifold part, is partly again introduced into through EGR valve, cooler for recycled exhaust gas, inlet manifold described
Cylinder；The air inlet of the cylinder through supercharger air compressor, intercooler and in it is cold after return to after air inlet pipe
The cylinder, it is characterised in that：Multiple cylinder packets connect the more exhaust manifolds respectively；It is described
There are turbine multiple turbine volute chambers to lead to turbine wheel；The more exhaust manifolds respectively enter corresponding multiple described
Turbine volute chamber；At least partly described exhaust manifold is connected with the EGR valve at the same time.
It is further characterized by：The every exhaust manifold is at least connected with two cylinder exhausts.
Preferably：The cylinder is six, and combination of two is connected with three exhaust manifolds, and the turbine includes
First turbine volute chamber, the second turbine volute chamber, the 3rd turbine volute chamber；First exhaust manifold in three exhaust manifolds
The EGR valve and the first turbine volute chamber are connected at the same time, second exhaust manifold connects the EGR valve and described second at the same time
Turbine volute chamber, the 3rd exhaust manifold are individually connected with the 3rd turbine volute chamber.
The first turbine volute chamber, the second turbine volute chamber, the 3rd turbine volute chamber sectional area arrange in gradient.
Preferably：The 3rd turbine volute chamber sectional area is more than the second turbine volute chamber and the first turbine volute chamber.
The second turbine volute chamber and the 3rd asymmetric setting in turbine volute chamber section.
The EGR valve is triple valve.
It is more advantageous to reducing each cylinder row the beneficial effects of the present invention are three runner spiral casing of pressure booster and exhaust manifold arrangement
Disturbed between gas, using exhaust pulses effect, easy to the holding of exhaust energy.Beneficial effects of the present invention also reside in the supercharging of three runners
Different cross-sectional volute chamber is provided with device spiral case, the spiral case asymmetric degree of different gradients can be formed, it is different easy to engine
EGR rate optimizes under operating mode.
Brief description of the drawings
Fig. 1 is the engine system configuration diagram of the present invention.
Fig. 2 is a kind of turbine volute cavity configuration schematic diagram of turbine of the present invention.
Fig. 3 is second of turbine volute cavity configuration schematic diagram of the invention.
Fig. 4 is the third turbine volute cavity configuration schematic diagram of the invention.
Fig. 5-9 is view of the EGR valve under different operating modes.
Embodiment
A kind of internal combustion engine exhaust system with exhaust gas recycling using asymmetric turbocharger as shown in Figure 1, including
Pipeline 18, inlet manifold 17, turbine after multiple cylinders, exhaust manifold, EGR valve 20, cooler for recycled exhaust gas 19, EGR coolings
Machine, supercharger air compressor 28, intercooler 29 and in it is cold after air inlet pipe 30；The exhaust of cylinder is through exhaust manifold part
Into turbine, partly cylinder is again introduced into through EGR valve 20, cooler for recycled exhaust gas 19, inlet manifold 17.Cylinder
The first cylinder 11 and the second cylinder 12 discharge gas introduce first exhaust manifold 21；3rd cylinder 13 and 14 row of the 4th cylinder
The gas gone out introduces second exhaust manifold 22；5th cylinder 15 and the gas of the 6th cylinder 16 discharge introduce the 3rd exhaust manifold
23.The gas flowed out in 22 and the 3rd exhaust manifold 23 of second exhaust manifold is at least partly recycled to inlet manifold 17.By
Gas in one exhaust manifold 21,22 and the 3rd exhaust manifold 23 of second exhaust manifold is respectively fed to the first turbine snail of turbine
In shell chamber 24, the second turbine volute chamber 25 and the 3rd turbine volute chamber 26, then promote turbine wheel 27.
As shown in Fig. 2, above-mentioned asymmetric turbocharger, including turbine, turbine include spiral case and turbo blade
31 parts.Three volute chambers, the first turbine volute chamber 24, the second turbine volute chamber the 25, the 3rd are provided with turbine volute case
Turbine volute chamber 26.Three volute chambers connect three groups of difference exhaust manifolds respectively.Wherein the 3rd turbine volute chamber 26 has opposite
There is larger sectional area in the second turbine volute chamber 25, the first turbine volute chamber 24.Wherein enter first exhaust manifold 21, the
A gas part for two exhaust manifolds 22 realizes and recycles that remainder respectively enters the first turbine volute of turbine by EGR
Chamber 24, the second turbine volute chamber 25.Compared with prior art, the present invention is relative to volute chamber 26, and there is provided with different non-right
The volute chamber 25 and volute chamber 24 of title degree.The asymmetric path of setting is more advantageous to being formed the EGR rate of different gradients, easy to start
EGR rate optimizes under machine difference operating mode.
By structure shown in Fig. 2, following effect can be produced.Three groups of exhaust manifolds of engine respectively with the first turbine volute
Chamber 24, the second turbine volute chamber 25, the 3rd turbine volute chamber 26 are connected.Done work by volute chamber into turbine expansion.Due to
One turbine volute chamber 24, the second turbine volute chamber 25, the 3rd turbine volute chamber 26 have different throat areas, the three groups of snails made
Shell intracavitary air-flow receives different degrees of throttling.Air-flow is smaller in the 26 received throttling of the 3rd turbine volute chamber, therefore the 3rd whirlpool
Take turns gas energy in volute chamber 26 and keep preferable, gas pressure is relatively low, can guarantee that the higher work efficiency of turbine.First turbine snail
Shell chamber 24, the second turbine volute chamber 25,26 throat area of the 3rd turbine volute chamber increase successively.Under the influence of throttling action,
First turbine volute chamber 24, the second turbine volute chamber 25, the pressure of the 3rd turbine volute chamber 26 are sequentially reduced.First turbine volute
Chamber 24, the second turbine volute chamber 25 have higher pressure relative to the 3rd turbine volute chamber 26, thus relative to supercharging after
Air inlet, it can form appropriate barometric gradient.This is easy to utilize hot junction EGR valve, there is provided the EGR rate needed for engine.Further
, the first turbine volute chamber 24 have relative to 25 smaller of the second turbine volute chamber throat area, therefore relative to supercharging after
Air inlet, it can form the barometric gradient of bigger.Easy in low engine speed operating mode, there is provided small amount of exhaust gas recycling.When
, can be by EGR line, by the portion in first exhaust manifold 21, second exhaust manifold 22 when engine needs larger amount of EGR
Divide exhaust, the pressure difference formed using the first turbine volute chamber 24, the second turbine volute chamber 25, while introduce cooler for recycled exhaust gas.
Fig. 5-9 is view of the EGR valve under different operating modes.
When engine is in low speed large load operation, engine needs relatively low EGR rate, as shown in figure 9, EGR valve at this time
Plate 36 closes second flow channel 35, and first flow 34 opens wide, and EGR enters inlet manifold 17 through cooler for recycled exhaust gas 19.When engine exists
, it is necessary to higher EGR rate when low speed Smaller load is run, EGR valve plate 36 second flow channel 35, second flow channel 34 are partially opened or
Person's standard-sized sheet, as shown in Figure 6,7.When engine needs medium EGR rate, EGR valve plate 36 partially opens second flow channel 35, or
EGR valve plate 36 closes first flow 34, as shown in Figure 5 and Figure 8.
The second volute chamber 25 can also be set to be less than the first turbine volute chamber 24 in the present invention, as shown in Figure 3.Or as schemed
Shown in 4, the asymmetric turbocharger, including turbine, turbine include 31 part of spiral case and turbo blade.In turbine
Three volute chambers, the first turbine volute chamber 24, the second turbine volute chamber 25, the 3rd turbine volute chamber 26 are provided with machine spiral case.
Three volute chambers connect three groups of difference exhaust manifolds respectively.Wherein the second volute chamber of turbine volute case 25 has relative to the first whirlpool
Take turns the larger sectional area of volute chamber 24, the 3rd turbine volute chamber 26.Wherein enter first exhaust manifold 21, second exhaust manifold 22
A gas part realize and recycle that remainder respectively enters the first turbine volute of turbine chamber 24, the 3rd turbine by EGR
Volute chamber 26.
Invention has been described above, it is clear that present invention specific implementation is not subject to the restrictions described above, as long as adopting
The improvement of the various unsubstantialities carried out with the inventive concept and technical scheme of the present invention, or the not improved structure by the present invention
Think and technical solution directly applies to other occasions, within the scope of the present invention.
Claims (7)
1. a kind of internal combustion engine exhaust system with exhaust gas recycling, including multiple cylinders, exhaust manifold, EGR valve, EGR
Cooler, inlet manifold, turbine, supercharger air compressor, intercooler and in it is cold after air inlet pipe；The cylinder
Exhaust enters the turbine through the exhaust manifold part, is partly again introduced into institute through EGR valve, cooler for recycled exhaust gas, inlet manifold
State cylinder；It is characterized in that：Multiple cylinder packets connect the more exhaust manifolds respectively；The whirlpool
There are turbine multiple turbine volute chambers to lead to turbine wheel；The more exhaust manifolds respectively enter corresponding multiple whirlpools
Take turns spiral case chamber；At least partly described exhaust manifold is connected with the EGR valve at the same time.
2. the internal combustion engine exhaust system according to claim 1 with exhaust gas recycling, it is characterised in that：The every exhaust
Manifold is at least connected with two cylinder exhausts.
3. the internal combustion engine exhaust system according to claim 2 with exhaust gas recycling, it is characterised in that：The engine air
Cylinder is six, and combination of two is connected with three exhaust manifolds, and the turbine includes the first turbine volute chamber, the second turbine volute
Chamber, the 3rd turbine volute chamber；First exhaust manifold in three exhaust manifolds connects the EGR valve and described first at the same time
Turbine volute chamber, second exhaust manifold connect the EGR valve and the second turbine volute chamber at the same time, and the 3rd exhaust manifold is independent
It is connected with the 3rd turbine volute chamber.
4. the internal combustion engine exhaust system according to claim 3 with exhaust gas recycling, it is characterised in that：First turbine
Volute chamber, the second turbine volute chamber, the 3rd turbine volute chamber sectional area arrange in gradient.
5. the internal combustion engine exhaust system according to claim 4 with exhaust gas recycling, it is characterised in that：3rd turbine
Volute chamber sectional area is more than the second turbine volute chamber and the first turbine volute chamber.
6. the internal combustion engine exhaust system according to claim 5 with exhaust gas recycling, it is characterised in that：Second turbine
Volute chamber and the 3rd asymmetric setting in turbine volute chamber section.
7. the internal combustion engine exhaust system recycled according to claim 1-6 any one of them with exhaust gas, it is characterised in that：It is described
EGR valve is triple valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710928487.3A CN107939558B (en) | 2017-10-09 | 2017-10-09 | Internal combustion engine exhaust system with exhaust gas recirculation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710928487.3A CN107939558B (en) | 2017-10-09 | 2017-10-09 | Internal combustion engine exhaust system with exhaust gas recirculation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107939558A true CN107939558A (en) | 2018-04-20 |
| CN107939558B CN107939558B (en) | 2019-12-31 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710928487.3A Active CN107939558B (en) | 2017-10-09 | 2017-10-09 | Internal combustion engine exhaust system with exhaust gas recirculation |
Country Status (1)
| Country | Link |
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| CN (1) | CN107939558B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111042954A (en) * | 2019-12-05 | 2020-04-21 | 一汽解放汽车有限公司 | Exhaust heating system of internal combustion engine |
| CN112211757A (en) * | 2020-10-14 | 2021-01-12 | 哈尔滨工程大学 | Supercharged diesel engine EGR rate flexible adjustable system and adjusting method |
| CN113217233A (en) * | 2021-05-07 | 2021-08-06 | 潍柴动力股份有限公司 | Engine exhaust gas circulation system and engine misfire judging method |
| CN117090716A (en) * | 2023-10-19 | 2023-11-21 | 潍柴动力股份有限公司 | Variable pulse conversion valve, control method thereof and engine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4179892A (en) * | 1977-12-27 | 1979-12-25 | Cummins Engine Company, Inc. | Internal combustion engine with exhaust gas recirculation |
| US4395884A (en) * | 1981-02-26 | 1983-08-02 | The Jacobs Manufacturing Company | Method and apparatus for improved engine braking and operation |
| US7311090B2 (en) * | 2006-01-31 | 2007-12-25 | International Engine Intellectual Property Company, Llc | Engine exhaust gas passage flow orifice and method |
| DE202014100235U1 (en) * | 2014-01-20 | 2014-02-10 | Ford Global Technologies, Llc | Internal combustion engine with double-flow axial turbine and grouped cylinders |
| CN103953400A (en) * | 2014-03-04 | 2014-07-30 | 大同北方天力增压技术有限公司 | Turbine volute structure meeting requirement for containing booster |
-
2017
- 2017-10-09 CN CN201710928487.3A patent/CN107939558B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4179892A (en) * | 1977-12-27 | 1979-12-25 | Cummins Engine Company, Inc. | Internal combustion engine with exhaust gas recirculation |
| US4395884A (en) * | 1981-02-26 | 1983-08-02 | The Jacobs Manufacturing Company | Method and apparatus for improved engine braking and operation |
| US7311090B2 (en) * | 2006-01-31 | 2007-12-25 | International Engine Intellectual Property Company, Llc | Engine exhaust gas passage flow orifice and method |
| DE202014100235U1 (en) * | 2014-01-20 | 2014-02-10 | Ford Global Technologies, Llc | Internal combustion engine with double-flow axial turbine and grouped cylinders |
| CN103953400A (en) * | 2014-03-04 | 2014-07-30 | 大同北方天力增压技术有限公司 | Turbine volute structure meeting requirement for containing booster |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111042954A (en) * | 2019-12-05 | 2020-04-21 | 一汽解放汽车有限公司 | Exhaust heating system of internal combustion engine |
| CN112211757A (en) * | 2020-10-14 | 2021-01-12 | 哈尔滨工程大学 | Supercharged diesel engine EGR rate flexible adjustable system and adjusting method |
| CN113217233A (en) * | 2021-05-07 | 2021-08-06 | 潍柴动力股份有限公司 | Engine exhaust gas circulation system and engine misfire judging method |
| CN113217233B (en) * | 2021-05-07 | 2022-04-26 | 潍柴动力股份有限公司 | Engine exhaust gas circulation system and engine misfire judging method |
| CN117090716A (en) * | 2023-10-19 | 2023-11-21 | 潍柴动力股份有限公司 | Variable pulse conversion valve, control method thereof and engine |
| CN117090716B (en) * | 2023-10-19 | 2024-01-12 | 潍柴动力股份有限公司 | Variable pulse conversion valve, control method thereof and engine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107939558B (en) | 2019-12-31 |
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