CN115898716A - Low pressure exhaust gas recirculation system, engine and vehicle - Google Patents
Low pressure exhaust gas recirculation system, engine and vehicle Download PDFInfo
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- CN115898716A CN115898716A CN202211466783.3A CN202211466783A CN115898716A CN 115898716 A CN115898716 A CN 115898716A CN 202211466783 A CN202211466783 A CN 202211466783A CN 115898716 A CN115898716 A CN 115898716A
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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 invention provides a low-pressure exhaust gas recirculation system, an engine and a vehicle. The low-pressure exhaust gas recirculation system comprises a cooler, a drainer and a supercharger, wherein the supercharger comprises a turbine and a compressor connected with the turbine, the turbine is used for being connected with an exhaust manifold of the engine, and the compressor is used for being connected with an intake manifold of the engine; the cooler is connected with the turbine and the compressor; the drainer is connected with the cooler and the compressor, and the compressor conveys gas to the drainer so that the pressure in the drainer is smaller than the pressure in the cooler. The low-pressure exhaust gas recirculation system provided by the invention has higher reliability.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a low-pressure exhaust gas recirculation system, an engine and a vehicle.
Background
In order to further reduce the energy consumption of the engine, the engine uses an Exhaust Gas Recirculation (EGR) system to reintroduce part of the exhaust gas discharged from the engine into the cylinder, thereby reducing the in-cylinder combustion temperature, increasing the compression ratio, and further reducing the energy consumption. Among them, the EGR system is mainly divided into a high pressure EGR system and a low pressure EGR system.
In the related art, a low pressure EGR system takes exhaust gas from the turbine of the engine supercharger, and the exhaust gas is mixed with fresh intake air before passing through an EGR cooler, an EGR valve, and the like, and returning to the engine.
However, in the low-pressure EGR system, condensed water generated by cooling the exhaust gas is likely to enter the compressor of the supercharger, which may damage the compressor of the supercharger.
Disclosure of Invention
The invention provides a low-pressure exhaust gas recirculation system, an engine and a vehicle, and aims to solve the technical problem that condensed water generated by cooling of exhaust gas is easy to enter a compressor of a supercharger to cause damage to the compressor of the supercharger.
In a first aspect, the invention provides a low-pressure exhaust gas recirculation system applied to an engine, the low-pressure exhaust gas recirculation system comprises a cooler, a drainer and a supercharger, the supercharger comprises a turbine and a compressor connected with the turbine, the turbine is used for being connected with an exhaust manifold of the engine, and the compressor is used for being connected with an intake manifold of the engine;
the cooler is connected with the turbine and the compressor;
the drainer is connected with the cooler and the compressor, and the compressor delivers gas to the drainer so that the pressure in the drainer is less than the pressure in the cooler.
In a possible implementation manner, the low-pressure exhaust gas recirculation system provided by the invention comprises a drainer body, wherein a first channel and a second channel are arranged on the drainer body, one end of the first channel is connected with a cooler, the other end of the first channel is communicated with the outside, the extending direction of the first channel is consistent with the extending direction of the drainer body, one end of the second channel is connected with a gas compressor, and the other end of the second channel is communicated with the first channel;
the cooler has a drain port that communicates with the first passage.
In a possible implementation manner, the low-pressure exhaust gas recirculation system provided by the invention is characterized in that the second channel comprises a first connecting section and a second connecting section, one end of the first connecting section is connected with the gas compressor, the other end of the first connecting section is connected with one end of the second connecting section, and the other end of the second connecting section is communicated with the first channel;
the extending direction of the second connecting section is consistent with the extending direction of the first channel, and an included angle is formed between the extending direction of the first connecting section and the extending direction of the second connecting section.
In one possible implementation, the invention provides a low-pressure exhaust gas recirculation system, wherein the inner diameter of the end of the second connecting section, which is far away from the first connecting section, is smaller than the inner diameter of the end of the second connecting section, which is close to the first connecting section.
In a possible implementation manner, the low-pressure exhaust gas recirculation system provided by the invention further comprises a heating jacket, wherein the outer wall of the heating jacket is connected with the drainer body, and the heating jacket is used for being communicated with a cylinder cover of an engine so as to form a loop for circulating the antifreeze.
In one possible implementation, the invention provides the low-pressure exhaust gas recirculation system, wherein the drainer body is provided with a concave part, and at least part of the heating jacket is embedded in the concave part.
In one possible implementation, the low-pressure exhaust gas recirculation system further comprises a catalytic converter and a control valve, wherein the catalytic converter is connected with the turbine;
the control valve is arranged on a connecting pipeline of the cooler and the compressor.
In a possible implementation manner, the low-pressure exhaust gas recirculation system further comprises an air inlet throttle valve, an air filter and an air inlet intercooler;
the air filter is connected with the air compressor, and the air inlet throttle valve is arranged on a connecting pipeline of the air filter and the air compressor;
the compressor is connected with an air intake intercooler, and the air intake intercooler is used for being connected with an air intake manifold of the engine.
In a second aspect, the present invention provides an engine comprising an engine block and the low pressure exhaust gas recirculation system of the first aspect connected to the engine block.
In a third aspect, the invention provides a vehicle comprising a vehicle body and the engine of the second aspect connected to the vehicle body.
The invention provides a low-pressure exhaust gas recirculation system, an engine and a vehicle. The cooler is connected with the turbine, the cooler is connected with the compressor, the drainer is connected with the cooler, and the drainer is connected with the compressor. The compressor is utilized to convey the gas compressed by the compressor into the drainer, so that the pressure in the drainer is smaller than that in the cooler, and thus, condensed water is easy to be sucked into the drainer, and the compressor of the supercharger is effectively prevented from being damaged due to the fact that the condensed water enters the compressor of the supercharger.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a low pressure EGR system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a drainer in a low pressure EGR system according to an embodiment of the present invention;
FIG. 3 is a left side view of a drainer in a low pressure EGR system provided in accordance with an embodiment of the present invention;
FIG. 4 is a top view of a drainer in a low pressure exhaust gas recirculation system provided by an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of an engine provided in an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a vehicle according to an embodiment of the present invention.
Description of reference numerals:
100-a cooler;
200-a drainer;
210-a drainer body;
211 — a first channel;
212-a second channel;
2121 — a first connecting segment;
2122-a second connecting segment;
213-a recess;
220-heating jacket;
300-a supercharger;
310-a turbine;
320-a compressor;
400-an engine;
410-an exhaust manifold;
420-an intake manifold;
430-cylinder cover;
440-an engine block;
500-a catalytic converter;
600-a control valve;
700-air intake throttle valve;
800-air filter;
900-air intake intercooler;
1000-low pressure exhaust gas recirculation system;
1100-vehicle;
1110 — vehicle body.
Detailed Description
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning a fixed connection, an indirect connection through intervening media, a connection between two elements, or an interactive relationship between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.
The terms "first," "second," and "third" (if any) in the description and claims of the invention and the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.
Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or maintenance tool that comprises a list of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or maintenance tool.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the related art, the EGR system is mainly divided into a high pressure EGR system and a low pressure EGR system, the high pressure EGR system takes exhaust gas from a turbine of a supercharger, and the exhaust gas returns to an intake pipe of an engine through an EGR cooler, an EGR valve, and the like to be mixed with fresh intake air. The driving force for the exhaust gas is the pressure of the higher pressure exhaust. Low pressure EGR systems take exhaust gas from the turbine of the supercharger, typically after aftertreatment (catalytic converter), and the exhaust gas is mixed with fresh intake air before being returned to the engine compressor through EGR coolers, EGR valves, etc. The driving force of the exhaust gas is the suction force of the compressor of the supercharger with lower pressure.
In the low pressure EGR system, when high temperature waste gas flowed through the EGR cooler, because gas temperature reduces to below the dew point of water, produced a large amount of comdenstion water, and because EGR cooler internal pressure is less than outside atmospheric pressure this moment, the comdenstion water is discharged to atmospheric degree of difficulty through the action of gravity great, and the comdenstion water easily can be brought into the compressor by gas and causes the impeller to damage, if enter into the jar in can produce negative effects to the burning of engine.
In order to solve the technical problems, the low-pressure exhaust gas recirculation system provided by the invention is characterized in that the drainer is arranged, the drainer is connected with the cooler and the compressor, and the compressor is used for conveying gas compressed by the compressor into the drainer, so that a low-pressure interval is formed in the drainer, namely, the pressure of the low-pressure interval in the drainer is smaller than that in the cooler, condensed water can be discharged into the atmosphere through the drainer under the action of pressure difference, and therefore, the impeller damage caused by the gas brought into the compressor can be effectively avoided, and the reliability of an engine can be improved.
Fig. 1 is a schematic structural diagram of a low-pressure exhaust gas recirculation system according to an embodiment of the present invention.
Referring to fig. 1, the low-pressure exhaust gas recirculation system 1000 provided by the invention is applied to an engine 400, and the low-pressure exhaust gas recirculation system 1000 comprises a cooler 100, a water drainer 200 and a supercharger 300, wherein the supercharger 300 comprises a turbine 310 and a compressor 320 connected with the turbine 310, the turbine 310 is used for being connected with an exhaust manifold 410 of the engine 400, and the compressor 320 is used for being connected with an intake manifold 420 of the engine 400.
The cooler 100 is connected to the turbine 310, and the cooler 100 is connected to the compressor 320.
The water drainer 200 is connected with the cooler 100, the water drainer 200 is connected with the compressor 320, and the compressor 320 delivers the gas to the water drainer 200 so that the pressure in the water drainer 200 is lower than the pressure in the cooler 100.
In use, a portion of the exhaust gas from the exhaust manifold 410 enters the cooler 100, condensed water from the exhaust gas enters the drainer 200, and a portion of the exhaust gas enters the intake manifold 420 of the engine 400 via the compressor 320.
Specifically, the bottom of the cooler 100 is provided with a water outlet, so as to prevent the gas from overflowing from the water outlet, the size of the water outlet is small, the internal pressure of the cooler 100 is lower than the external atmospheric pressure, the condensed water is easy to collect near the water outlet, and the difficulty of discharging the condensed water is large.
Therefore, by providing the drain 200, the drain 200 communicates with the drain port of the condenser, and the compressor 320 feeds the gas compressed by the compressor into the drain 200 so that the pressure in the drain 200 is lower than the pressure in the cooler 100, the condensed water is easily sucked into the drain 200 and then discharged to the atmosphere through the drain 200.
It can be understood that the gas compressed by the compressor 320 is delivered into the drainer 200 by the compressor 320, so that the pressure in the drainer 200 is lower than the pressure in the cooler 100, the implementation difficulty is low, the structure is simple, the occupied space is small, and the arrangement of the low-pressure exhaust gas recirculation system 1000 is facilitated.
The low-pressure exhaust gas recirculation system 1000 provided by the embodiment is provided with the cooler 100, the water drainer 200 and the supercharger 300, wherein the supercharger 300 comprises a turbine 310 and a compressor 320 connected with the turbine 310, the turbine 310 is connected with an exhaust manifold 410 of the engine 400, and the compressor 320 is connected with an intake manifold 420 of the engine 400. The cooler 100 is connected to the turbine 310, and the cooler 100 is connected to the compressor 320. The water drainer 200 is connected to the cooler 100, and the water drainer 200 is connected to the compressor 320. The compressor 320 is used for conveying the gas compressed by the compressor 320 into the drainer 200, so that the pressure in the drainer 200 is smaller than that in the cooler 100, and thus, condensed water is easy to be sucked into the drainer 200, and the compressor 320 of the supercharger 300 is effectively prevented from being damaged due to the fact that the condensed water enters the compressor 320 of the supercharger 300.
Fig. 2 is a schematic structural diagram of a water drainer in a low-pressure exhaust gas recirculation system according to an embodiment of the present invention, fig. 3 is a left side view of the water drainer in the low-pressure exhaust gas recirculation system according to the embodiment of the present invention, and fig. 4 is a top view of the water drainer in the low-pressure exhaust gas recirculation system according to the embodiment of the present invention.
Referring to fig. 2 to 4, the drain 200 includes a drain body 210, a first passage 211 and a second passage 212 are provided on the drain body 210, one end of the first passage 211 is connected to the cooler 100, the other end of the first passage 211 communicates with the outside, and the extending direction of the first passage 211 coincides with the extending direction of the drain body 210. Thus, the drainer 200 has small overall volume, small occupied space, simple structure and convenient processing.
One end of the second passage 212 is connected to the compressor 320, and the other end of the second passage 212 is located in the first passage 211, that is, the other end of the second passage 212 communicates with the first passage 211.
The first channel 211 is a condensed water discharge channel, and the second channel 212 is a gas channel.
Specifically, in order to save space, one end of the drain body 210 abuts against the bottom of the cooler 100, and the first passage 211 communicates with the drain port of the cooler 100.
When the air cooler is used, the air compressor 320 is used for conveying the air compressed by the air compressor 320 into the second channel 212, so that the pressure in the first channel 211 is lower than that in the cooler 100, and the condensed water is easily sucked into the first channel 211 and then discharged into the atmosphere through the first channel 211.
In one possible implementation, the second passage 212 includes a first connection section 2121 and a second connection section 2122, one end of the first connection section 2121 is connected to the compressor 320, the other end of the first connection section 2121 is connected to one end of the second connection section 2122, and the other end of the second connection section 2122 is communicated with the first passage 211.
The extending direction of the second connecting section 2122 is the same as the extending direction of the first channel 211, and the extending direction of the first connecting section 2121 and the extending direction of the second connecting section 2122 form an included angle.
It will be appreciated that the extending direction of the first connecting section 2121 and the extending direction of the second connecting section 2122 form an included angle, so that the connecting position of the water drainer 200 and the compressor 320 can be arranged on the side wall of the water drainer 200, which facilitates the arrangement of the first passage 211 and the second passage 212, thereby making the overall structure of the water drainer 200 compact.
Specifically, the extending direction of the first connecting section 2121 and the extending direction of the second connecting section 2122 may be perpendicular to each other.
It should be noted that, in order to reduce the pressure loss of the gas compressed by the compressor 320 and delivered into the second passage 212 by the compressor 320, one end of the first connecting section 2121 and one end of the second connecting section 2122 are uniformly transitionally connected.
In another possible implementation, the extending direction of the second channel 212 coincides with the extending direction of the first channel 211.
To increase the flow rate of the gas delivered by the compressor 320 into the second passage 212, the inner diameter of the second connecting section 2122 at the end facing away from the first connecting section 2121 is smaller than the inner diameter of the second connecting section 2122 at the end adjacent to the first connecting section 2121. In this way, the amount of gas delivered by the compressor 320 into the second channel 212 may be reduced, thereby reducing energy consumption.
Specifically, as shown in FIG. 2, the second connecting section 2122 has a gradually decreasing inner diameter at an end facing away from the first connecting section 2121.
Note that, in order to reduce the size of the water drainer 200 and reduce the occupied space, the inner diameter dimension of the end of the first passage 211 facing away from the cooler 100 is smaller than the inner diameter dimension of the portion of the first passage 211 that receives the second passage 212.
In some embodiments, the drainer 200 further includes a heating jacket 220, an outer wall of the heating jacket 220 is connected to the drainer body 210, and the heating jacket 220 is configured to communicate with a cylinder head 430 of the engine 400 to form a loop for circulating the antifreeze solution.
It should be noted that the inner cavity of the heating jacket 220 is isolated from both the first channel 211 and the second channel 212.
It will be appreciated that in cold environments, condensate tends to freeze up and clog the drain of the cooler 100, resulting in a failure in which condensate cannot be drained. Therefore, by providing the heating jacket 220, the heating jacket 220 and the cylinder head 430 of the engine 400 form a heating water path, and the antifreeze in the cylinder head 430 is circulated into the heating jacket 220, so that the heat of the antifreeze is transferred to the first passage 211 through the heating jacket 220 and the drain body 210.
Moreover, the heat of the gas in the second channel 212 is transferred to the first channel 211, and the heating effect can be achieved.
In order to improve the heating effect, the drain body 210 has a recess 213, and at least a portion of the heating jacket 220 is embedded in the recess 213. Thus, the distance from the heating jacket 220 to the first channel 211 can be reduced, thereby improving the heat transfer efficiency of the antifreeze solution and improving the heat utilization rate of the antifreeze solution.
In order to facilitate connection of the heating jacket 220 with the cylinder head 430 of the engine 400, the extending direction of the heating jacket 220 and the extending direction of the first passage 211 form an included angle.
For example, the extending direction of the heating jacket 220 and the extending direction of the first passage 211 may be perpendicular to each other.
In one possible implementation, the low-pressure exhaust gas recirculation system 1000 further includes a catalytic converter 500 and a control valve 600, the catalytic converter 500 is connected with the turbine 310, and the cooler 100 is connected with the catalytic converter 500.
The control valve 600 is provided in a connection line of the cooler 100 and the compressor 320.
Among them, the catalytic converter 500 is used to convert CO, HC, and NO in exhaust gas x Is converted into gas harmless to human body.
Wherein the control valve 600 is used to control the amount of exhaust gas entering the compressor 320.
In some embodiments, low pressure exhaust gas recirculation system 1000 further includes an intake throttle 700, an air filter 800, and an intake intercooler 900.
The air cleaner 800 is connected to the compressor 320, and the intake throttle valve 700 is provided in a connecting line between the air cleaner 800 and the compressor 320.
Wherein an intake throttle valve 700 is used to control the amount of fresh air entering the compressor 320.
The air cleaner 800 is used to remove impurities from fresh air, among other things.
Fig. 5 is a schematic structural diagram of an engine according to an embodiment of the present invention.
Referring to fig. 5, the present invention provides an engine 400 including an engine block 440 and a low pressure exhaust gas recirculation system 1000 provided in the above-described embodiment connected to the engine block 440.
The structure and principle of the low pressure egr system 1000 are described in detail in the above embodiments, which are not described herein again.
In engine 400 according to the present embodiment, engine body 440 and low-pressure exhaust gas recirculation system 1000 connected to engine body 440 are provided, whereby the number of failures of engine 400 can be reduced and the reliability of engine 400 can be improved.
Fig. 6 is a schematic structural diagram of a vehicle according to an embodiment of the present invention.
Referring to fig. 6, the present invention provides a vehicle 1100 including a vehicle body 1110 and the engine 400 provided in the above embodiment connected to the vehicle body 1110.
The structure and principle of the engine 400 are described in detail in the above embodiments, which are not repeated herein.
According to the vehicle provided by the embodiment, the vehicle body 1110 and the engine 400 connected with the vehicle body 1110 are arranged, so that the reliability of the engine 400 is high, the overall reliability of the vehicle 1100 is improved, and the user experience is improved.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the spirit of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A low pressure exhaust gas recirculation system for use with an engine, the low pressure exhaust gas recirculation system comprising a cooler, a drainer, a supercharger, the supercharger comprising a turbine for connection to an exhaust manifold of the engine and a compressor connected to the turbine for connection to an intake manifold of the engine;
the cooler is connected with the turbine and the compressor;
the drainer is connected with the cooler and the compressor, and the compressor conveys gas to the drainer so that the pressure in the drainer is lower than the pressure in the cooler.
2. The low-pressure exhaust gas recirculation system according to claim 1, wherein the drainer includes a drainer body provided with a first passage and a second passage, one end of the first passage is connected to the cooler, the other end of the first passage communicates with the outside, and the first passage extends in the same direction as the drainer body;
one end of the second channel is connected with the gas compressor, and the other end of the second channel is communicated with the first channel;
the cooler has a drain opening in communication with the first passage.
3. The low pressure exhaust gas recirculation system of claim 2, wherein the second passage includes a first connection section and a second connection section, one end of the first connection section is connected to the compressor, the other end of the first connection section is connected to one end of the second connection section, and the other end of the second connection section is communicated with the first passage;
the extending direction of the second connecting section is consistent with the extending direction of the first channel, and an included angle is formed between the extending direction of the first connecting section and the extending direction of the second connecting section.
4. The low pressure exhaust gas recirculation system of claim 3, wherein an inner diameter of the second connection segment at an end facing away from the first connection segment is smaller than an inner diameter of the second connection segment at an end near the first connection segment.
5. The low pressure exhaust gas recirculation system of any one of claims 2 to 4, wherein the water drainer further comprises a heating jacket, an outer wall of the heating jacket being connected to the water drainer body, the heating jacket being adapted to communicate with a cylinder head of the engine to form a circuit for circulation of antifreeze fluid.
6. The low pressure exhaust gas recirculation system of claim 5, wherein the drainer body has a recess in which at least a portion of the heating jacket is partially embedded.
7. The low pressure exhaust gas recirculation system according to any one of claims 1 to 4, further comprising a catalytic converter and a control valve, the catalytic converter being connected to the turbine, the cooler being connected to the catalytic converter;
the control valve is arranged on a connecting pipeline of the cooler and the compressor.
8. The low pressure exhaust gas recirculation system according to any one of claims 1 to 4, further comprising an intake throttle valve, an air cleaner, and an intake intercooler;
the air filter is connected with the air compressor, and the air inlet throttle valve is arranged on a connecting pipeline of the air filter and the air compressor;
the compressor is connected with the air intake intercooler, and the air intake intercooler is used for being connected with an air intake manifold of the engine.
9. An engine comprising an engine block and a low pressure exhaust gas recirculation system according to any one of claims 1 to 8 connected to the engine block.
10. A vehicle characterized by comprising a vehicle body and the engine of claim 9 connected to the vehicle body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211466783.3A CN115898716A (en) | 2022-11-22 | 2022-11-22 | Low pressure exhaust gas recirculation system, engine and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211466783.3A CN115898716A (en) | 2022-11-22 | 2022-11-22 | Low pressure exhaust gas recirculation system, engine and vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN115898716A true CN115898716A (en) | 2023-04-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211466783.3A Pending CN115898716A (en) | 2022-11-22 | 2022-11-22 | Low pressure exhaust gas recirculation system, engine and vehicle |
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| Country | Link |
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| CN (1) | CN115898716A (en) |
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- 2022-11-22 CN CN202211466783.3A patent/CN115898716A/en active Pending
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