CN215979638U - Exhaust gas recirculation pipeline system and engine and vehicle with same - Google Patents
Exhaust gas recirculation pipeline system and engine and vehicle with same Download PDFInfo
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- CN215979638U CN215979638U CN202122225492.2U CN202122225492U CN215979638U CN 215979638 U CN215979638 U CN 215979638U CN 202122225492 U CN202122225492 U CN 202122225492U CN 215979638 U CN215979638 U CN 215979638U
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Abstract
The utility model provides an exhaust gas recirculation pipeline system, and an engine and a vehicle with the same. The exhaust gas recirculation piping system includes: an air intake system; a plurality of cylinder bodies; the cylinder intake manifolds are arranged in a plurality of cylinder intake manifolds, the cylinder intake manifolds and the cylinder bodies are arranged in a one-to-one correspondence mode, and each cylinder body is communicated with the intake system through one cylinder intake manifold; the cylinder air inlet manifold comprises a flow dividing cavity, wherein the flow dividing cavity is provided with a first pipeline and a plurality of second pipelines, the first pipeline is communicated with an air outlet pipeline of at least one cylinder body, the plurality of second pipelines are arranged in one-to-one correspondence with the plurality of cylinder air inlet manifolds, and exhaust gas exhausted from the flow dividing cavity enters the corresponding cylinder air inlet manifolds through the second pipelines. Compared with the arrangement that exhaust gas circulation is carried out after the exhaust gas of the cylinder body is collected in the prior art, exhaust gas recirculation is carried out on the exhaust pipeline of a single cylinder body, the exhaust pressure is higher, and higher exhaust gas recirculation rate can be realized.
Description
Technical Field
The utility model relates to the technical field of energy conservation and emission reduction of engines, in particular to an exhaust gas recirculation pipeline system, an engine with the same and a vehicle with the same.
Background
With the strictness of emission regulations and oil consumption regulations, the primary goal of automobile development is energy conservation and emission reduction. The exhaust gas recirculation technology can reduce the knocking tendency and the pumping loss, improve the fuel economy and is an important development direction of an automobile fuel-saving technical route.
The ignition intervals of the three-cylinder gasoline engine and the four-cylinder gasoline engine are different, so that the exhaust pulse intervals are different, relatively speaking, the exhaust pressure of the three-cylinder gasoline engine is higher, the exhaust energy is larger, but the exhaust pulse intervals are long, under the same exhaust gas recirculation arrangement, the exhaust gas recirculation rate of the three cylinders is more uneven than that of the four cylinders, and a plurality of patents for applying exhaust gas recirculation to the four-cylinder gasoline engine exist, but most of the patents are not suitable for the three-cylinder gasoline engine.
Use the patent of publication number CN201610172153.3 as an example, provide a gasoline engine exhaust gas recirculation mixer in the patent, including the blender shell and be located the blender inner chamber of blender shell, be equipped with blender air inlet, exhaust gas recirculation inlet passageway and blender export on the blender shell, blender air inlet and blender export set up relatively, be formed with between the inner wall of blender shell and the outer wall of blender inner chamber and admit air the communicating middle cavity of inlet passageway with exhaust gas recirculation, be equipped with the passageway that is used for communicateing middle cavity and blender inner chamber on the chamber wall of blender inner chamber. The waste gas recirculation mixer for the gasoline engine can improve the uniformity of waste gas recirculation of each cylinder and improve the thermal efficiency of a high-load area in the gasoline engine.
Patent publication No. CN201110349056.4 provides a hybrid intake system and method for a gasoline engine equipped with Exhaust Gas Recirculation (EGR). The air intake system includes: the system comprises an engine intake manifold, an EGR (exhaust gas recirculation) manifold connected to an exhaust pipe of the engine, 1 throttle valve and 1 EGR valve which are arranged on the EGR manifold, 1 vacuum air intake port arranged on the engine intake manifold, a cooling water temperature control switch arranged on a water jacket of an engine cylinder body, and a tumble generation device arranged between the intake manifold and an air inlet. Under the condition of proper EGR amount, the utility model can increase the power of the engine by 5-7 percent and reduce the specific fuel consumption by 5-8 percent. However, the present invention is applicable only to a case where the EGR amount is appropriate, and the exhaust gas recirculation rate of the system cannot be improved.
The patent document with publication number CN201320849102.1 provides a gasoline engine EGR (exhaust gas recirculation) layered air intake system based on a flow guide plate, which belongs to the technical field of engines, wherein an exhaust pipe is fixedly connected with an air intake manifold through a bypass pipe, an EGR valve, an EGR cooler and an EGR loop; the airflow cavity at the air inlet side of the cylinder cover part is respectively and correspondingly connected with the airflow cavity of the air inlet shunt cavity part, and the air inlet of the cylinder cover part corresponds to each manifold of the air inlet shunt cavity part; the throttle valve is fixedly connected with an air inlet main pipe hole through an air inlet main pipe; each exhaust manifold of the exhaust pipe is correspondingly connected with the four exhaust passages of the cylinder cover part; the utility model can avoid the phenomena of early mixing of the waste gas and the fresh air outside the combustion chamber and accumulation mixing after the air inlet valve is closed, realize isobaric air inlet of the pressure of the fresh air and the waste gas, reduce the mixing degree of the fresh air and the waste gas, realize the load control of the engine, improve the circulating heat efficiency of the gasoline engine, realize high EGR rate combustion and effectively improve the fuel economy of the gasoline engine.
Patent document No. CN201610172153.3 provides a gasoline engine EGR (i.e., exhaust gas recirculation) mixer, which includes a mixer housing and a mixer inner cavity located in the mixer housing, the mixer housing is provided with a mixer air inlet, an EGR inlet passage and a mixer outlet, the mixer air inlet and the mixer outlet are oppositely arranged, an intermediate cavity communicated with the EGR inlet passage is formed between an inner wall of the mixer housing and an outer wall of the mixer inner cavity, and a passage for communicating the intermediate cavity and the mixer inner cavity is provided on a cavity wall of the mixer inner cavity. The EGR mixer of the gasoline engine can improve the uniformity of EGR of each cylinder and improve the thermal efficiency of a high-load area in the gasoline engine.
In the above gasoline engine exhaust gas recirculation system, the improvement of the exhaust gas recirculation rate of the gasoline engine is limited.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide an exhaust gas recirculation pipeline system, an engine with the same and a vehicle with the same, so as to solve the problem of uneven exhaust gas recirculation rate of the exhaust gas recirculation system in the prior art.
In order to achieve the above object, according to one aspect of the present invention, there is provided an exhaust gas recirculation pipe system including: an air intake system; a plurality of cylinder bodies; the cylinder intake manifolds are arranged in a plurality of cylinder intake manifolds, the cylinder intake manifolds and the cylinder bodies are arranged in a one-to-one correspondence mode, and each cylinder body is communicated with the intake system through one cylinder intake manifold; the cylinder air inlet manifold comprises a flow dividing cavity, wherein the flow dividing cavity is provided with a first pipeline and a plurality of second pipelines, the first pipeline is communicated with an air outlet pipeline of at least one cylinder body, the plurality of second pipelines are arranged in one-to-one correspondence with the plurality of cylinder air inlet manifolds, and exhaust gas exhausted from the flow dividing cavity enters the corresponding cylinder air inlet manifolds through the second pipelines.
Furthermore, each second pipeline is provided with a sensor, and the sensors are used for detecting the flow rate of the exhaust gas in the second pipelines.
Further, each second pipeline is also provided with a cylinder inlet pipe valve, and the cylinder inlet pipe valve is used for regulating the flow of the exhaust gas of the second pipeline.
Further, the exhaust gas recirculation pipe system further includes: each cylinder body is communicated with the exhaust gas collecting pipe through an exhaust pipeline, an outlet of the exhaust gas collecting pipe is communicated with an exhaust system, an exhaust gas reflux valve is arranged on at least one exhaust pipeline, the first pipeline is communicated with the exhaust pipeline provided with the exhaust gas reflux valve, and the exhaust gas reflux valve is positioned between the first pipeline and the exhaust gas collecting pipe.
Further, a first valve is arranged on the first pipeline and used for adjusting the flow of the exhaust gas in the first pipeline.
Further, a cylinder exhaust sensor is arranged on at least one exhaust pipeline and used for detecting the temperature value and/or the pressure value of the exhaust gas in the exhaust pipeline.
Further, the number of the cylinders is three.
Furthermore, the number of the exhaust pipelines is three, and a cylinder exhaust sensor is arranged on each of the three exhaust pipelines.
According to another aspect of the present invention, there is provided an engine comprising an exhaust gas recirculation pipe system as described above.
According to another aspect of the utility model, a vehicle is provided, the vehicle comprising an engine, the engine being as described above.
By applying the technical scheme of the utility model, the exhaust pipeline of the cylinder body is communicated with the flow dividing cavity by arranging the first pipeline, so that the exhaust gas exhausted from the cylinder body directly enters the flow dividing cavity and then returns to the cylinder body through the second pipeline.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:
FIG. 1 shows a schematic structural diagram of an embodiment of an exhaust gas recirculation pipe system according to the present disclosure;
FIG. 2 shows a block schematic diagram of an embodiment of an exhaust gas recirculation conduit system according to the present disclosure;
figure 3 shows a schematic view of a first embodiment of a controller according to the present invention;
fig. 4 shows a schematic view of a second embodiment of a controller according to the present invention.
Wherein the figures include the following reference numerals:
10. an air intake system;
20. a cylinder body; 21. an exhaust line; 211. an exhaust gas recirculation valve; 212. a cylinder exhaust sensor;
30. a cylinder intake manifold;
40. a shunting cavity; 41. a first pipeline; 411. a first valve; 42. a second pipeline; 421. a sensor; 422. a cylinder intake pipe valve;
50. an exhaust gas collector;
60. and (4) a discharge system.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above 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 terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, 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 apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art, in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and the same devices are denoted by the same reference numerals, and thus the description thereof will be omitted.
Referring to fig. 1-4, according to an embodiment of the present application, an exhaust gas recirculation pipe system is provided.
The exhaust gas recirculation piping system includes: an air intake system 10; a plurality of cylinders 20, the cylinders 20 being provided; a plurality of cylinder intake manifolds 30, the plurality of cylinder intake manifolds 30 being provided in one-to-one correspondence with the plurality of cylinder blocks 20, each cylinder block 20 being communicated with the intake system 10 through one cylinder intake manifold 30; the exhaust gas treatment device comprises a branch cavity 40, wherein the branch cavity 40 is provided with a first pipeline 41 and a plurality of second pipelines 42, the first pipeline 41 is communicated with the exhaust pipeline 21 of at least one cylinder body 20, the plurality of second pipelines 42 are arranged in a one-to-one correspondence mode with the plurality of cylinder inlet manifolds 30, and the exhaust gas discharged from the branch cavity 40 enters the corresponding cylinder inlet manifolds 30 through the second pipelines 42.
By applying the technical scheme of the utility model, the exhaust pipeline of the cylinder body is communicated with the flow dividing cavity by arranging the first pipeline, so that the exhaust gas exhausted from the cylinder body directly enters the flow dividing cavity and then returns to the cylinder body through the second pipeline.
Specifically, the intake system 10 is used to provide air for each cylinder, and optionally, the intake system 10 may be connected to an air cleaner for removing impurities and the like from the air, and the intake system 10 obtains clean air filtered by the air cleaner and then inputs the air into the cylinder through the cylinder intake manifold 30.
In an exemplary embodiment, a sensor 421 is disposed on each second conduit 42, and the sensor 421 is configured to detect the flow of exhaust gas in the second conduit 42. The sensor 421 can detect the exhaust gas flow in the second pipes 42 in real time so as to control the exhaust gas flow in each second pipe 42 to be uniform.
In an exemplary embodiment, a cylinder inlet pipe valve 422 is also provided on each second conduit 42, the cylinder inlet pipe valve 422 being adapted to regulate the flow of exhaust gas to the second conduit 42. By providing the cylinder intake pipe valve 422, the flow amount in the second pipe 42 can be adjusted by controlling the opening degree of the cylinder intake pipe valve 422, and the valve of the cylinder intake pipe valve 422 can be directly closed to prohibit the exhaust gas from entering the cylinder intake manifold. In practice, when the sensor 421 detects the exhaust gas flow in the second pipe 42, the cylinder intake pipe valve 422 is adjusted to change the exhaust gas flow in each second pipe 42 according to actual operation requirements.
In an exemplary embodiment, the exhaust gas recirculation pipeline system further includes an exhaust manifold 50, each cylinder 20 communicates with the exhaust manifold 50 through an exhaust pipeline 21, an outlet of the exhaust manifold 50 communicates with the exhaust system 60, an exhaust gas recirculation valve 211 is disposed on at least one exhaust pipeline 21, the first pipeline 41 communicates with the exhaust pipeline 21 provided with the exhaust gas recirculation valve 211, and the exhaust gas recirculation valve 211 is located between the first pipeline 41 and the exhaust manifold 50. The exhaust gas recirculation valve 211 is used to control the amount of exhaust gas entering the exhaust manifold 50 from the exhaust gas discharged from the exhaust line 21 of each cylinder 20.
Alternatively, the exhaust manifold 50 is connected to the exhaust system 60, the exhaust gas from the cylinder is collected into the exhaust manifold 50 through the exhaust line 21 and mixed, the mixed exhaust gas is introduced into the exhaust system 60, the exhaust system 60 may be connected to a tail pipe, the tail pipe may be connected to a muffler line, and the exhaust gas is introduced into the exhaust system 60 and then introduced into the muffler line through the tail pipe. The muffler can reduce the noise generated when the engine discharges the exhaust gas, and the three-way catalyst can be arranged in the discharge system 60 and used as a purification device, so that various harmful gases in the exhaust gas can be changed into nontoxic gases, and the harm of the exhaust gas to the environment is reduced. Specifically, when the exhaust gas recirculation system of the present application is applied to a vehicle, the exhaust manifold 50, the exhaust system 60, the tail pipe, and the muffler piping structure together guide the exhaust gas to the vehicle rear for emission, thereby preventing harmful gas in the exhaust gas from entering the cabin.
In an exemplary embodiment, a first valve 411 is provided in the first line 41, the first valve 411 being used to regulate the flow of exhaust gas in the first line 41. The flow rate in the first pipeline 41 can be adjusted by controlling the opening degree of the first valve 411, and the valve of the first valve 411 can also be directly closed to prohibit the exhaust gas from entering the branch chamber.
In an exemplary embodiment, at least one exhaust line 21 is provided with an exhaust cylinder sensor 212, and the exhaust cylinder sensor 212 is configured to detect a temperature value and/or a pressure value of exhaust gas in the exhaust line 21. When the cylinder discharge sensor 212 is used to detect the pressure value of the exhaust gas in the exhaust line 21, the current exhaust gas state of each cylinder may be determined according to the pressure value obtained by the cylinder discharge sensor 212, and when the cylinder discharge sensor 212 is used to detect the temperature value of the exhaust gas in the exhaust line 21, it may be determined whether the exhaust gas intake amount of the cylinder needs to be adjusted to lower the temperature in the cylinder according to the temperature value obtained by the cylinder discharge sensor 212. In practical applications, the cylinder exhaust gas sensor 212 may also detect other parameters characterizing the exhaust gas in the exhaust line 21.
In one exemplary embodiment, there are three cylinders 20. Compared with a four-cylinder engine, the three-cylinder engine has higher exhaust pressure and higher exhaust energy, the exhaust pulse interval of the three-cylinder engine is long, the exhaust gas recirculation rate of the three-cylinder engine is more uneven than that of the four-cylinder engine under the same exhaust gas recirculation pipeline system arrangement, the exhaust gas recirculation pipeline system in the embodiment is arranged in the three-cylinder engine, and the characteristic that the exhaust pressure of the three-cylinder engine is higher is fully utilized to obtain higher exhaust gas recirculation rate.
In an exemplary embodiment, there are three exhaust lines 21, and each of the three exhaust lines 21 has one cylinder exhaust sensor 212. As shown in fig. 1, an exhaust cylinder sensor 212 is disposed on each exhaust pipe 21, so as to detect the exhaust state of the exhaust gas in each exhaust pipe 21 in real time.
The exhaust gas recirculation pipeline system in the above embodiment may be used in the technical field of engine equipment, that is, according to another specific embodiment of the present application, an engine is provided, the engine includes the exhaust gas recirculation pipeline system, and the exhaust gas recirculation pipeline system is the above exhaust gas recirculation pipeline system.
The engine in the above embodiment may be used in the technical field of vehicle equipment, and according to another specific embodiment of the present application, a vehicle is provided, and the vehicle includes the engine, and the engine is the engine described above.
Specifically, the engine may be a gasoline engine, the number of cylinders may be three, and in this embodiment, a three-cylinder gasoline engine refers to all gasoline engines having three cylinders. The gasoline engine has the characteristics of high rotating speed, simple structure, light weight and the like, and is widely applied to automobiles, particularly small automobiles. Compared with a four-cylinder gasoline engine, the three-cylinder gasoline engine has the characteristics of low oil consumption, strong power, high power density and the like, and has wide application prospect in various hybrid vehicle types because the three-cylinder gasoline engine is small in size and light in weight and is suitable for a hybrid power system.
In the prior art, the ignition intervals of a three-cylinder gasoline engine and a four-cylinder gasoline engine are different, so that the exhaust pulse intervals are different, and under the same exhaust gas recirculation pipeline arrangement, the exhaust gas recirculation rate of the three-cylinder gasoline engine is more uneven than that of the four-cylinder gasoline engine, the exhaust pressure of the three-cylinder gasoline engine is higher, and the exhaust energy is larger, so that most of EGR exhaust gas recirculation pipeline systems applied to the four-cylinder gasoline engine are not suitable for the three-cylinder gasoline engine. In the embodiment, the characteristic that the exhaust pressure of the three-cylinder gasoline engine is higher is fully utilized, and the exhaust gas recirculation pipeline is arranged, so that the higher exhaust gas recirculation rate is obtained.
As shown in fig. 2, the exhaust gas recirculation line of the three-cylinder gasoline engine includes an intake module 100, a cylinder module 120, an exhaust module 140, and an exhaust gas recirculation module 160. The cylinder module 120 contains three cylinders 20, the air intake module 100 is used for providing clean, dry, sufficient and stable air for the cylinders in the cylinder module so as to enable the engine to operate normally, the exhaust module 140 is used for exhausting the exhaust gas exhausted by the cylinder module out of the vehicle body, and preferably, the exhaust module 140 guides the exhaust gas exhausted by the cylinder module to the tail of the vehicle for exhausting, so that the exhaust gas is prevented from entering the cab. The exhaust gas recirculation module 160 is used for re-injecting the exhaust gas discharged from the cylinder module into the cylinder block 20, and changing the oxygen concentration in the cylinder block 20 by changing the amount of the exhaust gas injected into the cylinder block 20, thereby reducing the combustion temperature in the cylinder block, suppressing the generation of nitrogen oxides, and achieving higher economy of the engine.
In one exemplary embodiment, intake module 100 includes an intake system 10, an air cleaner coupled to intake system 10, and a cylinder intake manifold 30 coupling intake system 10 to cylinder 20. Since the engine in this embodiment is a three-cylinder gasoline engine, the number of the cylinder intake manifolds 30 is correspondingly set to three, the three cylinder intake manifolds 30 are provided in one-to-one correspondence with the three cylinder blocks 20, and each cylinder block 20 is communicated with the intake system 10 through one cylinder intake manifold 30. The intake system 10 is used for providing air for each cylinder 20, the intake system 10 is connected to an air filter for filtering impurities and the like in the air, and the intake system 10 obtains clean air filtered by the air filter and then inputs the air into the cylinder 20 through a cylinder intake manifold 30.
In an exemplary embodiment, the exhaust module 140 includes an exhaust line 21 connected to the cylinder 20, an exhaust manifold 50, and an exhaust system 60.
As shown in fig. 1, each exhaust pipe 21 is provided with an exhaust cylinder sensor 212, and the exhaust cylinder sensor 212 is configured to detect a temperature value, a pressure value, and the like of the exhaust gas in the exhaust pipe 21 so as to characterize parameters of the exhaust gas in the exhaust pipe 21.
Each cylinder 20 is communicated with the exhaust gas collecting pipe 50 through an exhaust pipeline 21, the outlet of the exhaust gas collecting pipe 50 is communicated with the exhaust system 60, an exhaust gas reflux valve 211 is arranged on the exhaust pipeline 21, the first pipeline 41 is communicated with the exhaust pipeline 21 provided with the exhaust gas reflux valve 211, and the exhaust gas reflux valve 211 is positioned between the first pipeline 41 and the exhaust gas collecting pipe 50. The exhaust gas recirculation valve 211 is used to control the amount of exhaust gas entering the exhaust manifold 50 from the exhaust gas discharged from the exhaust line 21 of each cylinder 20.
The exhaust manifold 50 is connected to the exhaust system 60, the exhaust gas discharged from the cylinder is intensively mixed in the exhaust manifold 50 through the exhaust pipe 21, the mixed exhaust gas is introduced into the exhaust system 60, the exhaust system 60 may be connected to a tail pipe, the tail pipe may be connected to a muffler pipe, and the exhaust gas is introduced into the exhaust system 60 and then introduced into the muffler pipe through the tail pipe. The muffler can reduce the noise generated when the engine discharges the exhaust gas, and the three-way catalyst can be arranged in the discharge system 60 and used as a purification device, so that various harmful gases in the exhaust gas can be changed into nontoxic gases, and the harm of the exhaust gas to the environment is reduced. Specifically, when the exhaust gas recirculation system of the present application is applied to a vehicle, the exhaust manifold 50, the exhaust system 60, the tail pipe, and the muffler piping structure together guide the exhaust gas to the vehicle rear for emission, thereby preventing harmful gas in the exhaust gas from entering the cabin.
In an exemplary embodiment, the exhaust gas recirculation module 160 includes a branch chamber 40, the branch chamber 40 has a first pipeline 41 and a second pipeline 42, the first pipeline 41 is communicated with the exhaust pipeline 21 of one cylinder 20, the second pipeline 42 is three, the three second pipelines 42 are arranged in one-to-one correspondence with the three cylinder intake manifolds 30, and the exhaust gas discharged from the branch chamber 40 enters the corresponding cylinder intake manifold 30 through each second pipeline 42. Each second pipe 42 is provided with a sensor 421 for detecting the flow rate of exhaust gas in the second pipe 42 and a cylinder intake pipe valve 422, and the cylinder intake pipe valve 422 is used for regulating the flow rate of exhaust gas in the second pipe 42. The first pipe 41 is provided with a first valve 411, the first valve 411 is used for adjusting the flow of the exhaust gas in the first pipe 41, and the opening degree of the cylinder inlet pipe valve 422 and the first valve 411 is adjusted, so that the flow of the exhaust gas in the corresponding pipe can be changed.
As shown in fig. 1, the first pipe 41 is connected to the exhaust pipe 21 of one cylinder 20 at a position as close as possible to the exhaust port of the cylinder 20 to obtain a higher exhaust pressure, thereby achieving a higher exhaust gas recirculation rate. In practical applications, the exhaust line 21 connected to the first line may be the exhaust line 21 of any cylinder 20. For the three-cylinder gasoline engine in the embodiment, the preferable scheme is that the exhaust pipeline 21 of one cylinder 20 is connected with the first pipeline 41, when the application object is the four-cylinder gasoline engine, the number of the exhaust pipelines 21 connected with the first pipeline 41 can be changed according to actual needs, for example, two cylinders 20 of the four-cylinder gasoline engine, which are in denrod, can be connected with the first pipeline 41, and the connection position should be the position close to the exhaust port of the cylinder 20 before the exhaust gas collecting pipe 50. The connecting position is arranged at the position close to the exhaust port of the cylinder body 20 before the exhaust gas collecting pipe 50, compared with the arrangement that the exhaust gas discharged by each cylinder body is selected to be recycled in the prior art, the exhaust gas recycling device has larger exhaust pressure due to the fact that the exhaust gas recycling device is closer to the exhaust port of the cylinder body 20, and higher exhaust gas recycling utilization rate can be obtained.
Among the above-mentioned scheme, through setting up the exhaust pipe and the reposition of redundant personnel chamber intercommunication of first pipeline with the cylinder body, make from cylinder body exhaust waste gas directly get into the reposition of redundant personnel chamber and then get back to the cylinder body through the second pipeline, compare in prior art and collect the waste gas of cylinder body and carry out exhaust gas recirculation's setting again, carry out exhaust gas recirculation on the exhaust pipe of single cylinder body, have bigger exhaust pressure, can realize higher exhaust gas recirculation rate, and simultaneously, it links to each other with the cylinder intake manifold of each cylinder body to set up a plurality of second pipelines, can realize the control to the waste gas air input of each cylinder body alone, make the waste gas volume of each cylinder body even. When the vehicle with the exhaust gas recirculation system runs, the content of nitrogen oxides in discharged gas is lower, the harm to the environment is smaller, and meanwhile, the fuel economy is improved.
In one exemplary embodiment, a controller is provided on the vehicle for regulating the flow of exhaust gas in each of the conduits in the exhaust gas recirculation system.
As shown in fig. 3, the controller may be configured to obtain a temperature value and/or a pressure value of the exhaust gas in each exhaust line 21 detected by the cylinder exhaust sensor 212. Taking the temperature value of the exhaust gas in each exhaust pipe 21 as an example, alternatively, after obtaining the temperature value of each cylinder 20, judging whether the temperature value of the current cylinder 20 is the required preset value, the controller can change the flow rate of the exhaust gas entering the exhaust gas collecting pipe 50 through the exhaust gas return valve 211, when the exhaust gas return valve 211 is closed, the exhaust gas corresponding to the cylinder 20 does not enter the exhaust manifold 50, is entirely used for exhaust gas recirculation, when the exhaust gas recirculation valve 211 is opened and the first valve 411 is closed, the exhaust gas discharged from the cylinder block 20 does not enter the exhaust gas recirculation system, and the entire exhaust gas discharged from the cylinder block 20 is discharged out of the vehicle body through the exhaust module, and when both the exhaust gas recirculation valve 211 and the first valve 411 are opened, the ratio of the exhaust gas entering the exhaust gas recirculation line and directly exiting the vehicle body, i.e., the utilization rate of the exhaust gas, can be changed by adjusting the opening degrees of the exhaust gas recirculation valve 211 and the first valve 411.
Alternatively, when the cylinder exhaust sensor 212 detects that the temperature of the exhaust gas discharged from the corresponding cylinder 20 exceeds a set value, the controller may adjust the opening degree of the cylinder intake pipe valve 422 on the second pipe 42 connected to the corresponding cylinder 20 to change the temperature of the cylinder 20 to a preset value by adjusting the flow rate of the exhaust gas into the corresponding cylinder 20.
As shown in fig. 4, the controller may be configured to obtain the exhaust gas flow values in the second pipeline 42 obtained by real-time monitoring of the sensors 421, in this embodiment, there are three sensors 421, and the controller simultaneously obtains the exhaust gas flow values in the three second pipelines 42 obtained by monitoring of the three sensors 421, and when the exhaust gas flow values in the three second pipelines 42 are not uniform, for example, it may be configured that when the three exhaust gas flow values are not equal, the controller controls the opening of the corresponding cylinder intake pipe valve 422 to change, and adjusts the exhaust gas flow in the second pipeline 42. Specifically, the sensor 421 for detecting the exhaust gas flow rate value in the second pipe 42 may be a pressure sensor, a temperature sensor, or the like, which has different measurement principles.
The vehicle can be of various types, for example, an automobile, particularly a household car, and the arrangement of the three-cylinder gasoline engine and the exhaust gas recirculation can enable the automobile to have higher economic benefit.
Alternatively, the vehicle provided by the utility model may also be a vehicle having a four-cylinder gasoline engine (hereinafter referred to as a four-cylinder gasoline engine refers to a gasoline engine having four cylinders). Four-cylinder gasoline engines are used in cars, motorcycles, chain saws and other small power machines.
A vehicle having a four cylinder gasoline engine includes an exhaust gas recirculation circuit including: an intake module 100, a cylinder module 120, an exhaust module 140, and an exhaust gas recirculation module 160. The cylinder module 120 contains four cylinders 20, the air intake module 100 is used for providing clean, dry, sufficient and stable air for the cylinders in the cylinder module so as to enable the engine to operate normally, the exhaust module 140 is used for exhausting the exhaust gas exhausted by the cylinder module out of the vehicle body, and preferably, the exhaust module 140 guides the exhaust gas exhausted by the cylinder module to the tail of the vehicle for exhausting, so that the exhaust gas is prevented from entering the cab. The exhaust gas recirculation module 160 is used for re-injecting the exhaust gas discharged from the cylinder module into the cylinder block 20, and changing the oxygen concentration in the cylinder block 20 by changing the amount of the exhaust gas injected into the cylinder block 20, thereby reducing the combustion temperature in the cylinder block, and inhibiting the generation of nitrogen oxides, so that the four-cylinder gasoline engine has higher economy.
In one exemplary embodiment, intake module 100 includes an intake system 10, an air cleaner coupled to intake system 10, and a cylinder intake manifold 30 coupling intake system 10 to cylinder 20. Since the engine in this embodiment is a four-cylinder gasoline engine, the number of the cylinder intake manifolds 30 is correspondingly set to four, the four cylinder intake manifolds 30 are disposed in one-to-one correspondence with the four cylinder blocks 20, and each cylinder block 20 is communicated with the intake system 10 through one cylinder intake manifold 30. The intake system 10 is used for providing air for each cylinder 20, the intake system 10 is connected to an air filter for filtering impurities and the like in the air, and the intake system 10 obtains clean air filtered by the air filter and then inputs the air into the cylinder 20 through a cylinder intake manifold 30.
In an exemplary embodiment, the exhaust module 140 includes an exhaust line 21 connected to the cylinder 20, an exhaust manifold 50, and an exhaust system 60.
In an exemplary embodiment, the exhaust gas recirculation module 160 includes a branch chamber 40, the branch chamber 40 has a first pipeline 41 and a second pipeline 42, the first pipeline 41 is communicated with the exhaust pipeline 21 of at least one cylinder 20, the number of the second pipelines 42 is four, the four second pipelines 42 are arranged in one-to-one correspondence with the four cylinder intake manifolds 30, and the exhaust gas discharged from the branch chamber 40 enters the corresponding cylinder intake manifolds 30 through each second pipeline 42. Each second pipe 42 is provided with a sensor 421 for detecting the flow rate of exhaust gas in the second pipe 42 and a cylinder intake pipe valve 422, and the cylinder intake pipe valve 422 is used for regulating the flow rate of exhaust gas in the second pipe 42. The first pipe 41 is provided with a first valve 411, the first valve 411 is used for adjusting the flow of the exhaust gas in the first pipe 41, and the opening degree of the cylinder inlet pipe valve 422 and the first valve 411 is adjusted, so that the flow of the exhaust gas in the corresponding pipe can be changed.
Preferably, the first pipe 41 is connected to the exhaust pipes 21 of the two cylinders 20 at a position as close as possible to the exhaust ports of the cylinders 20 to obtain a higher exhaust pressure, thereby achieving a higher exhaust gas recirculation rate. In practical applications, the exhaust line 21 connected to the first line may be the exhaust line 21 of any cylinder 20. The connecting position is arranged at the position close to the exhaust port of the cylinder body 20 before the exhaust gas collecting pipe 50, compared with the arrangement that the exhaust gas discharged by each cylinder body is selected to be recycled in the prior art, the exhaust gas recycling device has larger exhaust pressure due to the fact that the exhaust gas recycling device is closer to the exhaust port of the cylinder body 20, and higher exhaust gas recycling utilization rate can be obtained. That is, in the exhaust gas recirculation line of the four cylinder gasoline engine, the exhaust gas of the two cylinders 20 is selected for the exhaust gas recirculation, which makes it possible to obtain a higher exhaust gas recirculation rate.
In an exemplary embodiment, each exhaust pipe 21 is provided with an exhaust cylinder sensor 212, and the exhaust cylinder sensor 212 is used for detecting a temperature value, a pressure value and the like of exhaust gas in the exhaust pipe 21 so as to characterize parameters of the exhaust gas in the exhaust pipe 21.
In an exemplary embodiment, each cylinder 20 communicates with the exhaust manifold 50 through an exhaust duct 21, an outlet of the exhaust manifold 50 communicates with the exhaust system 60, and an exhaust gas recirculation valve 211 is disposed on the exhaust duct 21, the exhaust gas recirculation valve 211 being located between the first duct 41 and the exhaust manifold 50. The exhaust gas recirculation valve 211 is used to control the amount of exhaust gas entering the exhaust manifold 50 from the exhaust gas discharged from the exhaust line 21 of each cylinder 20.
Preferably, two exhaust pipelines 21 are provided with the exhaust gas recirculation valve 211, and both exhaust gas recirculation valves 211 are located between the first pipeline 41 and the exhaust gas header 50. During use, the two exhaust gas recirculation valves 211 can be adjusted reasonably according to the engine operation, for example, when the flow of exhaust gas entering the exhaust gas recirculation system is too large, one of the exhaust gas recirculation valves 211 can be directly closed so that only the exhaust gas in one exhaust line 21 enters the exhaust gas recirculation system.
In an exemplary embodiment, the exhaust manifold 50 is coupled to the exhaust system 60, the exhaust gases from the cylinders 20 are collected into the exhaust manifold 50 via the exhaust line 21 and mixed, the mixed exhaust gases are introduced into the exhaust system 60, the exhaust system 60 may be coupled to a tailpipe, which may be coupled to a muffler line, and the exhaust gases are introduced into the exhaust system 60 via the tailpipe into the muffler line. The muffler can reduce the noise generated when the engine discharges the exhaust gas, and the three-way catalyst can be arranged in the discharge system 60 and used as a purification device, so that various harmful gases in the exhaust gas can be changed into nontoxic gases, and the harm of the exhaust gas to the environment is reduced.
Specifically, when the exhaust gas recirculation system in the present embodiment is applied to a vehicle, the exhaust manifold 50, the exhaust system 60, the tail pipe, and the muffler piping structure together guide the exhaust gas to the vehicle rear for emission, thereby preventing harmful gas in the exhaust gas from entering the cabin.
In one exemplary embodiment, a controller is provided on the vehicle for regulating the flow of exhaust gas in each of the conduits in the exhaust gas recirculation system.
As shown in fig. 3, the controller may be configured to obtain a temperature value and/or a pressure value of the exhaust gas in each exhaust line 21 detected by the cylinder exhaust sensor 212. Taking the example of obtaining the temperature value of the exhaust gas in each exhaust pipeline 21, optionally, after obtaining the temperature value of each cylinder 20, determining whether the current temperature value of the cylinder 20 is the required preset value, the controller may change the flow rate of the exhaust gas entering the exhaust gas collecting pipe 50 through the exhaust gas recirculation valve 211, when both the exhaust gas recirculation valves 211 are closed, the exhaust gas of the cylinder 20 does not enter the exhaust gas collecting pipe 50, and is all used for exhaust gas recirculation, when both the exhaust gas recirculation valves 211 are opened and the first valve 411 is closed, the exhaust gas discharged from the cylinder 20 does not enter the exhaust gas recirculation system, and at this time, the exhaust gas discharged from the cylinder 20 is all discharged out of the vehicle body through the exhaust module, when both the exhaust gas recirculation valves 211 and the first valve 411 are opened, the proportion of the exhaust gas entering the exhaust gas recirculation pipeline and directly discharged out of the vehicle body may be changed by adjusting the opening degrees of both the exhaust gas recirculation valves 211 and the first valve 411, i.e. to regulate the utilization of the exhaust gases.
Alternatively, when the cylinder exhaust sensor 212 detects that the temperature of the exhaust gas discharged from the corresponding cylinder 20 exceeds a set value, the controller may adjust the opening degree of the cylinder intake pipe valve 422 on the second pipe 42 connected to the corresponding cylinder 20 to change the temperature of the cylinder 20 to a preset value by adjusting the flow rate of the exhaust gas into the corresponding cylinder 20.
As shown in fig. 4, the controller may be configured to obtain the exhaust gas flow rate values in the second pipelines 42 obtained by real-time monitoring of the sensors 421, in this embodiment, there are four sensors 421, and the controller simultaneously obtains the exhaust gas flow rate values in the four second pipelines 42 obtained by monitoring of the four sensors 421, and when the exhaust gas flow rate values in the four second pipelines 42 are not uniform, for example, when the four exhaust gas flow rates are not equal to each other, the controller may set that the opening of the corresponding cylinder intake pipe valve 422 is changed to adjust the exhaust gas flow rate in the second pipeline 42. Specifically, the sensor 421 for detecting the exhaust gas flow rate value in the second pipe 42 may be a pressure sensor, a temperature sensor, or the like, which has different measurement principles.
The vehicle with the four-cylinder gasoline engine and the exhaust gas recirculation system can be various types of vehicles, such as cars, motorcycles, chain saws and other small-power machines, and automobiles, particularly domestic cars.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition to the foregoing, it should be noted that reference throughout this specification to "one embodiment," "another embodiment," "an embodiment," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally throughout this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the scope of the utility model to effect such feature, structure, or characteristic in connection with other embodiments.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An exhaust gas recirculation conduit system, comprising:
an air intake system (10);
a plurality of cylinders (20), wherein the number of the cylinders (20) is multiple;
a plurality of cylinder intake manifolds (30), wherein the plurality of cylinder intake manifolds (30) are arranged in one-to-one correspondence with the plurality of cylinder blocks (20), and each cylinder block (20) is communicated with the intake system (10) through one cylinder intake manifold (30);
the cylinder air inlet manifold comprises a branch cavity (40), wherein the branch cavity (40) is provided with a first pipeline (41) and a plurality of second pipelines (42), the first pipeline (41) is communicated with at least one exhaust pipeline (21) of the cylinder body (20), the plurality of second pipelines (42) are arranged in a one-to-one correspondence mode with the plurality of cylinder air inlet manifolds (30), and exhaust gas exhausted from the branch cavity (40) enters the corresponding cylinder air inlet manifolds (30) through the second pipelines (42).
2. An exhaust gas recirculation pipe system according to claim 1, characterized in that a sensor (421) is arranged on each second pipe (42), said sensor (421) being adapted to detect the exhaust gas flow in said second pipe (42).
3. The exhaust gas recirculation line system according to claim 1, characterized in that a cylinder intake pipe valve (422) is further provided on each of the second lines (42), the cylinder intake pipe valve (422) being used for regulating the exhaust gas flow of the second lines (42).
4. The exhaust gas recirculation line system of claim 1, further comprising:
the exhaust gas collecting pipe (50), each cylinder body (20) pass through exhaust pipe (21) with exhaust gas collecting pipe (50) intercommunication, the export of exhaust gas collecting pipe (50) communicates with exhaust system (60), at least one exhaust pipe (21) are last to be provided with exhaust gas reflux valve (211), first pipeline (41) with be provided with exhaust pipe (21) of exhaust gas reflux valve (211) communicate, exhaust gas reflux valve (211) are located between first pipeline (41) and exhaust gas collecting pipe (50).
5. An exhaust gas recirculation pipe system according to claim 4, characterized in that a first valve (411) is arranged on the first pipe (41), said first valve (411) being adapted to regulate the flow of exhaust gas in the first pipe (41).
6. Exhaust gas recirculation line system according to claim 4, characterized in that at least one exhaust line (21) is provided with an exhaust cylinder sensor (212), said exhaust cylinder sensor (212) being adapted to detect a temperature value and/or a pressure value of exhaust gases in said exhaust line (21).
7. Exhaust gas recirculation pipe system according to claim 1, characterized in that said cylinders (20) are three.
8. The exhaust gas recirculation line system according to claim 6, characterized in that the number of exhaust lines (21) is three, and one cylinder exhaust sensor (212) is provided on each of the three exhaust lines (21).
9. An engine comprising an exhaust gas recirculation pipe system according to any one of claims 1 to 8.
10. A vehicle comprising an engine, the engine being the engine of claim 9.
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| CN202122225492.2U CN215979638U (en) | 2021-09-14 | 2021-09-14 | Exhaust gas recirculation pipeline system and engine and vehicle with same |
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| CN202122225492.2U CN215979638U (en) | 2021-09-14 | 2021-09-14 | Exhaust gas recirculation pipeline system and engine and vehicle with same |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115234412A (en) * | 2022-06-30 | 2022-10-25 | 中国第一汽车股份有限公司 | Exhaust gas recirculation system, control method, engine and vehicle |
| CN115263624A (en) * | 2022-07-28 | 2022-11-01 | 中国第一汽车股份有限公司 | EGR (exhaust gas Recirculation) system for engine and control method thereof |
-
2021
- 2021-09-14 CN CN202122225492.2U patent/CN215979638U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115234412A (en) * | 2022-06-30 | 2022-10-25 | 中国第一汽车股份有限公司 | Exhaust gas recirculation system, control method, engine and vehicle |
| CN115263624A (en) * | 2022-07-28 | 2022-11-01 | 中国第一汽车股份有限公司 | EGR (exhaust gas Recirculation) system for engine and control method thereof |
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