CN114060183A - Exhaust gas circulation system for vehicle, control method and vehicle - Google Patents
Exhaust gas circulation system for vehicle, control method and vehicle Download PDFInfo
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- CN114060183A CN114060183A CN202010771947.8A CN202010771947A CN114060183A CN 114060183 A CN114060183 A CN 114060183A CN 202010771947 A CN202010771947 A CN 202010771947A CN 114060183 A CN114060183 A CN 114060183A
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- engine
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- cooler
- outlet
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000007789 gas Substances 0.000 claims description 160
- 238000002156 mixing Methods 0.000 claims description 18
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 16
- 239000001301 oxygen Substances 0.000 claims description 16
- 229910052760 oxygen Inorganic materials 0.000 claims description 16
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 abstract description 16
- 238000001816 cooling Methods 0.000 abstract description 7
- 239000002912 waste gas Substances 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
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
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/23—Layout, e.g. schematics
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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
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/23—Layout, e.g. schematics
- F02M26/24—Layout, e.g. schematics with two or more coolers
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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
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/23—Layout, e.g. schematics
- F02M26/28—Layout, e.g. schematics with liquid-cooled heat exchangers
-
- 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
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/33—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage controlling the temperature of the recirculated gases
Abstract
The invention discloses an exhaust gas circulation system for a vehicle, a control method and a vehicle, wherein the exhaust gas circulation system for the vehicle comprises: the heat exchanger is provided with a heat exchanger inlet and a heat exchanger outlet, and the heat exchanger outlet is connected with an air inlet of the engine; the cooler is provided with a cooler inlet and a cooler outlet, the cooler inlet is connected with the exhaust port of the engine, and the cooler outlet is connected with the air inlet of the engine and the inlet of the heat exchanger. According to the exhaust gas circulation system, the cooler is arranged in the exhaust gas circulation system, the outlet of the cooler is respectively connected with the inlet of the heat exchanger and the air inlet of the engine, and part of exhaust gas at the outlet of the cooler can enter the heat exchanger for cooling twice, so that the actual temperature of the exhaust gas entering the engine is effectively reduced, the exhaust gas can be fully combusted in the engine, and the lean combustion of the engine is better realized.
Description
Technical Field
The invention relates to the field of vehicle exhaust gas treatment, in particular to an exhaust gas circulation system for a vehicle, a control method and the vehicle.
Background
In the related art, exhaust gas discharged by an engine of a conventional vehicle is cooled by a cooler and then directly enters the engine for secondary combustion, but the temperature of the exhaust gas cooled by the cooler may still have a very high temperature, so that the temperature of the exhaust gas entering the engine cannot meet the requirement of the engine, thereby causing insufficient combustion of the exhaust gas and reducing the utilization efficiency of the exhaust gas.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. To this end, it is an object of the invention to propose an exhaust gas recirculation system for a vehicle. The cooler is arranged in the exhaust gas circulation system, the outlet of the cooler is respectively connected with the inlet of the heat exchanger and the air inlet of the engine, and part of exhaust gas at the outlet of the cooler can enter the heat exchanger to be cooled twice, so that the actual temperature of the exhaust gas entering the engine is effectively reduced, the exhaust gas can be fully combusted in the engine, and the lean combustion of the engine is better realized.
The invention also provides a control method for the exhaust gas circulation system.
The invention also provides a vehicle with the exhaust gas circulation system.
An exhaust gas circulation system for a vehicle according to the present invention includes: the heat exchanger is provided with a heat exchanger inlet and a heat exchanger outlet, and the heat exchanger outlet is connected with an air inlet of the engine; the cooler is provided with a cooler inlet and a cooler outlet, the cooler inlet is connected with the exhaust port of the engine, and the cooler outlet is connected with the air inlet of the engine and the inlet of the heat exchanger.
According to the exhaust gas circulation system for the vehicle, two branches are arranged in the exhaust gas circulation system, exhaust gas can respectively enter the engine through the two branches, and the exhaust gas on the second branch is cooled twice, so that the temperature of the exhaust gas entering the engine is effectively reduced, the combustion of the exhaust gas in the engine is more sufficient, the utilization rate of the exhaust gas is greatly improved, and the emission of the exhaust gas is reduced.
According to an embodiment of the present invention, the exhaust gas circulation system for a vehicle further includes: a filter having a filter first inlet in communication with the atmosphere, a filter second inlet connected to the cooler outlet, and a filter outlet connected to the heat exchanger inlet.
According to an embodiment of the present invention, the exhaust gas circulation system for a vehicle further includes: the regulating valve is provided with a first valve port, a second valve port and a third valve port, the first valve port is connected with the outlet of the cooler, the second valve port is connected with the air inlet of the engine, the third valve port is connected with the second inlet of the filter, and the opening degree of the second valve port and the opening degree of the third valve port are adjustable.
According to one embodiment of the invention, the filter comprises: a housing formed with a mixing chamber and the first and second filter inlets respectively communicating with the mixing chamber.
According to an embodiment of the invention, a first filter element is arranged between the first filter inlet and the mixing chamber, and a second filter element is arranged between the filter outlet and the mixing chamber.
According to an embodiment of the present invention, the exhaust gas circulation system for a vehicle further includes: and the tail gas treatment device is arranged between the exhaust port of the engine and the inlet of the cooler.
The control method of the exhaust gas circulation system according to the present invention includes: and adjusting the gas flow between the cooler outlet and the air inlet of the engine and/or the gas flow between the cooler outlet and the inlet of the heat exchanger according to the temperature of the cooler outlet exhaust gas, the temperature of the air inlet gas of the engine and the oxygen content of the air outlet of the engine.
According to the control method for the exhaust gas circulation system, the method can adjust the gas flow between the outlet of the cooler and the gas inlet of the engine and/or the gas flow between the outlet of the cooler and the inlet of the heat exchanger according to the temperature of the exhaust gas at the outlet of the cooler, the gas temperature at the gas inlet of the engine and the oxygen content at the gas outlet of the engine, so that the flow of the exhaust gas entering the second branch is controlled, and the actual temperature of the exhaust gas entering the engine can meet the requirement of the engine.
According to one embodiment of the invention, the flow of gas between the cooler outlet and the second inlet of the filter is increased when the temperature of the cooler outlet exhaust gas increases or the temperature of the inlet gas of the engine increases or the oxygen content of the exhaust outlet of the engine increases.
According to one embodiment of the invention, the filter second inlet is disconnected from the cooler outlet when the engine inlet gas temperature is less than a target value.
The vehicle according to the present invention is briefly described below.
According to the vehicle provided with the exhaust gas circulation system of the embodiment, the exhaust gas circulation system of the embodiment can control the flow of the exhaust gas directly entering the engine from the cooler according to the air inlet requirement of the engine, so that part of the exhaust gas can be secondarily cooled through the heat exchanger, the actual temperature of the exhaust gas entering the engine meets the requirement of the engine, meanwhile, the heat dissipated into the water cooling system by the cooler can be reduced, the exhaust gas circulation system on the vehicle can accurately control the entering amount of the exhaust gas according to the requirement of the engine, lean combustion is realized, the combustion efficiency of the engine of the vehicle is improved, the pollution of the vehicle is reduced, and the competitiveness of the vehicle in the market is improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic illustration of an exhaust gas recirculation system according to the present disclosure;
fig. 2 is a schematic view of a filter according to the present invention.
Reference numerals:
an exhaust gas recirculation system (100) is provided,
a first filter element 143, a second filter element 144, a mixing chamber 145, a filter outlet 146, a regulating valve 150,
an exhaust gas treatment device 160, a three-way catalyst 161, an after-treatment 162,
a first turbocharger 101, a second turbocharger 102, a controller 103, and a temperature sensor 104.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the related art, exhaust gas discharged by an engine of a conventional vehicle is cooled by a cooler and then directly enters the engine for secondary combustion, but the temperature of the exhaust gas cooled by the cooler may still have a very high temperature, so that the temperature of the exhaust gas entering the engine cannot meet the requirement of the engine, thereby causing insufficient combustion of the exhaust gas and reducing the utilization efficiency of the exhaust gas.
An exhaust gas circulation system 100 for a vehicle according to an embodiment of the present invention will be described with reference to fig. 1 to 2.
An exhaust gas circulation system 100 for a vehicle according to the present invention includes an engine 110, a heat exchanger 120 and a cooler 130, the heat exchanger 120 having a heat exchanger inlet and the heat exchanger 120, the heat exchanger 120 being connected to an air inlet of the engine 110; the cooler 130 has a cooler inlet connected to the exhaust of the engine 110 and a cooler outlet connected to the intake of the engine 110 and the heat exchanger inlet.
The mixed gas in the heat exchanger 120 can enter the air inlet of the engine 110 through the outlet of the heat exchanger, and enter the engine 110 through the air inlet of the engine 110 for combustion, the exhaust gas generated by the combustion of the engine 110 is discharged through the exhaust port of the engine 110, the exhaust port is connected with the inlet of the cooler, the exhaust gas generated by the engine 110 sequentially enters the cooler 130 through the exhaust port and the inlet of the cooler, and is cooled in the cooler 130, the exhaust gas cooled by the cooler 130 is discharged through the outlet of the cooler, the outlet of the cooler is respectively connected with the air inlet of the engine 110 and the inlet of the heat exchanger, a part of the cooled exhaust gas can directly enter the engine 110 through the air inlet of the engine 110, and the other part of the exhaust gas enters the heat exchanger 120 through the inlet of the heat exchanger.
In which, by providing the cooler 130 between the engine 110 and the heat exchanger 120, the exhaust gas of the engine 110 can enter the inside of the engine 110 through two branches and be combusted. Waste gas directly enters the engine 110 through the outlet of the cooler to form a first branch, the waste gas enters the engine 110 through the cooler 130 and the heat exchanger 120 to form a second branch, the cooler 130 can cool the waste gas discharged by the engine 110, the temperature of the waste gas entering the engine 110 is reduced, the heat exchanger 120 is arranged on the second branch, the waste gas on the second branch can be cooled in the heat exchanger 120 for the second time, the temperature of the waste gas entering the engine 110 is further reduced, the waste gas enters the engine 110 to be fully combusted and work, the utilization rate of the waste gas is improved, and meanwhile, the emission of the waste gas is reduced.
Further, since the exhaust gas can be cooled for the second time in the heat exchanger 120, the heat exchanger 120 effectively relieves the pressure of the cooler 130 on cooling the exhaust gas, and reduces the heat dissipated into the water cooling system by the cooler 130.
According to the exhaust gas circulation system 100 for the vehicle of the present invention, the exhaust gas circulation system 100 is provided with two branches, and the exhaust gas can respectively enter the engine 110 through the two branches, wherein the exhaust gas on the second branch is cooled twice, so that the temperature of the exhaust gas entering the engine 110 is effectively reduced, the combustion of the exhaust gas in the engine 110 is more sufficient, the utilization rate of the exhaust gas is greatly improved, and the emission of the exhaust gas is reduced.
According to one embodiment of the present invention, exhaust gas recirculation system 100 further includes a filter 140, filter 140 having a filter first inlet in communication with the atmosphere, a filter second inlet 141 connected to the cooler outlet, and a filter outlet 146 connected to the heat exchanger inlet. The atmosphere and the cooler outlet are connected to the filter first inlet and the filter second inlet 141, respectively, the filter 140 is adapted to filter air in the atmosphere to remove impurities from the air, and the filtered air and the cooled exhaust gas can be mixed in the filter 140, and the mixed gas is discharged through the filter outlet 146. By providing the filter 140, the air is ensured to be clean, and the mixing effect of the air and the waste gas is improved.
According to an embodiment of the present invention, the exhaust gas circulation system 100 for a vehicle further includes a modulator valve 150, and the modulator valve 150 has a first port connected to the cooler outlet, a second port connected to the intake port of the engine 110, and a third port connected to the second inlet 141 of the filter, and the opening degrees of the second port and the third port are adjustable.
The control valve 150 may be configured as a three-phase flow electrically controlled valve, and the first port, the second port and the third port are respectively connected to the cooler outlet, the air inlet of the engine 110 and the second inlet 141 of the filter, wherein the opening degrees of the second port and the third port are adjustable, and the opening degrees of the second port and the third port are adjustable according to the demand of the intake air flow of the engine 110.
Further, the exhaust gas circulation system 100 further includes a controller 103, the controller 103 is electrically connected to the regulating valve 150, the controller 103 can control a rotation angle of an inner valve element of the regulating valve 150, so as to control the opening degrees of the second valve port and the third valve port, and the convenience of adjusting the opening degrees of the first valve port and the second valve port is improved by arranging the controller 103 to control the regulating valve 150.
According to one embodiment of the present invention, the filter 140 includes a housing 142, and the housing 142 is formed with a mixing chamber 145 and a filter first inlet port and a filter second inlet port 141 respectively communicating with the mixing chamber 145. Wherein the air and the cooled exhaust gas enter the mixing chamber 145 through the first inlet of the filter 140 and the second inlet 141 of the filter, respectively, and are mixed in the mixing chamber 145 to form a mixed gas.
According to one embodiment of the invention, a first filter element 143 is disposed between the first filter inlet and the mixing chamber 145, and a second filter element 144 is disposed between the filter outlet 146 and the mixing chamber 145. The first filter 143 is adapted to filter air from the atmosphere, and the second filter 144 is adapted to filter the mixed gas; wherein, the first filter 143 can carry out coarse filtration to the air, blocks the particulate matter and the impurity that are greater than 30 μm outside the first filter 143, and the second filter 144 can carry out fine filtration to the gas after mixing, and first filter 143 and second filter 144 can be constructed as the filter medium board, and the filter medium board can be changed according to the demand.
According to an embodiment of the present invention, the exhaust gas circulation system 100 for a vehicle further includes an exhaust gas treatment device 160, and the exhaust gas treatment device 160 is disposed between an exhaust port of the engine 110 and an inlet of the cooler. The exhaust gas treatment device 160 includes: three way catalyst 161 and aftertreatment 162, set up exhaust treatment device 160 between the exhaust of engine 110 and the cooler import, make exhaust treatment device 160 can handle the harmful substance in the waste gas, reduce the pollution of waste gas to atmosphere.
According to an embodiment of the present invention, the exhaust gas circulation system 100 further includes a first turbocharger 101, a second turbocharger 102, and a temperature sensor 104, the first turbocharger 101 is used for generating negative pressure so that air in the atmosphere can smoothly enter the filter 140, the second turbocharger 102 is connected to an exhaust port of the engine 110 to suck out exhaust gas inside the engine 110, and the temperature sensor 104 is disposed at an outlet of the cooler and an intake port of the engine 110, or in a mixing chamber to detect a temperature of the exhaust gas at the outlet of the cooler, a temperature of the intake gas of the engine 110, and a temperature of the mixed gas.
Further, the temperature sensor 104 is connected to the controller 103, and feeds back the temperature of the exhaust gas at the outlet of the cooler, the temperature of the intake gas of the engine 110, and the temperature of the mixture gas to the controller 103, and the controller 103 adjusts the opening degrees of the second port and the third port of the regulating valve 150 according to the feedback of the temperature sensor 104.
The control method for the exhaust gas recirculation system 100 according to the present invention is described below.
The control method for the exhaust gas recirculation system 100 according to the present invention includes: the flow of gas between the cooler outlet and the intake of engine 110 and/or the flow of gas between the cooler outlet and the heat exchanger inlet is adjusted based on the cooler outlet exhaust gas temperature, the intake gas temperature of engine 110, and the exhaust outlet oxygen content of engine 110.
According to the control method for the exhaust gas circulation system 100 of the present invention, the method can adjust the gas flow between the outlet of the cooler and the inlet of the engine 110 and/or the gas flow between the outlet of the cooler and the inlet of the heat exchanger according to the temperature of the exhaust gas at the outlet of the cooler, the gas temperature at the inlet of the engine 110 and the oxygen content at the outlet of the engine 110, so as to control the flow of the exhaust gas into the second branch, and the actual temperature of the exhaust gas entering the engine 110 can meet the requirement of the engine 110.
According to one embodiment of the present invention, when the cooler outlet exhaust gas temperature increases or the inlet gas temperature of engine 110 increases or the outlet oxygen content of engine 110 increases, the gas flow between the cooler outlet and the second 141 inlet of the filter is increased.
Specifically, a target temperature T1 for entering exhaust gas is set in the engine 110, and by detecting the exhaust gas temperature T2 at the outlet of the cooler or detecting the gas temperature T3 at the inlet of the engine 110, when the exhaust gas temperature T2 at the outlet of the cooler or the gas temperature T3 at the inlet of the engine 110 is greater than the target temperature T1, the opening degree of the third valve port is increased to increase the gas flow between the outlet of the cooler and the second inlet 141 of the filter, so that more exhaust gas can be cooled for the second time, the temperature of the exhaust gas entering the engine 110 is reduced, and the temperature of the exhaust gas entering the engine 110 can meet the requirement of the engine.
Similarly, the air flow between the outlet of the cooler and the second inlet 141 of the filter may be controlled according to the detected oxygen content of the exhaust port of the engine 110, that is, the target oxygen content R is set at the exhaust port of the engine 110, and when the detected oxygen content R1 of the exhaust port of the engine 110 is greater than the target oxygen content R, the opening degree of the third valve port is increased to increase the air flow between the outlet of the cooler and the second inlet 141 of the filter, so that more exhaust gas may be subjected to secondary cooling, thereby reducing the temperature of the exhaust gas entering the engine 110, and enabling the temperature of the exhaust gas entering the engine 110 to meet the requirement.
It is to be understood that: the oxygen content is related to the combustion state of the engine 110, and the oxygen content R is lower as the engine 110 approaches lean combustion, whereas the oxygen content of the exhaust port of the engine 110 is higher, and the oxygen content is in positive correlation with the temperature of the exhaust port of the engine 110.
According to one embodiment of the present invention, when the intake gas temperature of the engine 110 is less than the target value, the filter second inlet 141 is disconnected from the cooler outlet. When the actual temperature T3 of the air intake of the engine 110 is lower than the target value T1, the load of the engine 110 is smaller, and the air intake temperature T3 of the engine 110 is cooled by the cooler 130 alone, so that the requirement of the air intake temperature of the engine 110 can be met, and the discharged exhaust gas does not need to be cooled again, and the controller 103 may adjust the third valve of the control valve to make the opening degree of the third valve zero, so as to cut off the connection between the second inlet 141 of the filter and the outlet of the cooler, so that the exhaust gas does not enter the second branch for cooling.
The vehicle according to the present invention is briefly described below.
According to the vehicle provided with the exhaust gas circulation system 100 of the embodiment, because the exhaust gas circulation system 100 of the embodiment is provided on the vehicle according to the invention, the exhaust gas circulation system 100 can control the flow of the exhaust gas directly entering the engine 110 from the cooler 130 according to the air intake requirement of the engine 110, so that part of the exhaust gas can be secondarily cooled by the heat exchanger 120, the actual temperature of the exhaust gas entering the engine 110 meets the requirement of the engine 110, and meanwhile, the heat dissipated into the water cooling system by the cooler 130 can be reduced, and the exhaust gas circulation system 100 on the vehicle can accurately control the entering amount of the exhaust gas according to the requirement of the engine 110, so that lean combustion is realized, the combustion efficiency of the vehicle engine 110 is improved, the pollution of the vehicle is reduced, and the competitiveness of the vehicle in the market is improved.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features.
In the description of the present invention, "a plurality" means two or more.
In the description of the present invention, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween.
In the description of the invention, "above", "over" and "above" a first feature in a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. An exhaust gas circulation system for a vehicle, comprising:
an engine;
the heat exchanger is provided with a heat exchanger inlet and a heat exchanger outlet, and the heat exchanger outlet is connected with an air inlet of the engine;
a cooler having a cooler inlet and a cooler outlet, the cooler inlet being connected to the exhaust of the engine, the cooler outlet being connected to the air intake of the engine and to the heat exchanger inlet.
2. The exhaust gas circulation system for a vehicle according to claim 1, further comprising: a filter having a filter first inlet in communication with the atmosphere, a filter second inlet connected to the cooler outlet, and a filter outlet connected to the heat exchanger inlet.
3. The exhaust gas circulation system for a vehicle according to claim 2, further comprising:
the regulating valve is provided with a first valve port, a second valve port and a third valve port, the first valve port is connected with the outlet of the cooler, the second valve port is connected with the air inlet of the engine, the third valve port is connected with the second inlet of the filter, and the opening degree of the second valve port and the opening degree of the third valve port are adjustable.
4. The exhaust gas circulation system for a vehicle according to claim 3, wherein the filter includes: a housing formed with a mixing chamber and the first and second filter inlets respectively communicating with the mixing chamber.
5. An exhaust gas circulation system for a vehicle according to claim 4, wherein a first filter element is provided between the first filter inlet and the mixing chamber and a second filter element is provided between the filter outlet and the mixing chamber.
6. The exhaust gas circulation system for a vehicle according to claim 5, further comprising: and the tail gas treatment device is arranged between the exhaust port of the engine and the inlet of the cooler.
7. A control method for an exhaust gas circulation system according to any one of claims 1 to 6, comprising:
and adjusting the gas flow between the cooler outlet and the air inlet of the engine and/or the gas flow between the cooler outlet and the inlet of the heat exchanger according to the temperature of the cooler outlet exhaust gas, the temperature of the air inlet gas of the engine and the oxygen content of the air outlet of the engine.
8. The control method for an exhaust gas circulation system according to claim 7, wherein when the cooler outlet exhaust gas temperature increases or the inlet gas temperature of the engine increases or the exhaust outlet oxygen content of the engine increases, the gas flow rate between the cooler outlet and the second inlet of the filter increases.
9. The control method for an exhaust gas circulation system according to claim 8, wherein the filter second inlet is disconnected from the cooler outlet when an intake gas temperature of the engine is less than a target value.
10. A vehicle comprising an exhaust gas recirculation system according to any of claims 1-6.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010771947.8A CN114060183A (en) | 2020-08-04 | 2020-08-04 | Exhaust gas circulation system for vehicle, control method and vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010771947.8A CN114060183A (en) | 2020-08-04 | 2020-08-04 | Exhaust gas circulation system for vehicle, control method and vehicle |
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| CN114060183A true CN114060183A (en) | 2022-02-18 |
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| DE102018218011A1 (en) * | 2018-10-22 | 2020-04-23 | Ford Global Technologies, Llc | Method for reducing the formation of condensate in a device for mixing exhaust gas and charge air |
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| CN207892732U (en) * | 2017-12-29 | 2018-09-21 | 台州吉利罗佑发动机有限公司 | Low pressure EGR apparatus and engine with the low pressure EGR apparatus |
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