CN111255598A - Cooler for EGR system and engine assembly with EGR system - Google Patents
Cooler for EGR system and engine assembly with EGR system Download PDFInfo
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- CN111255598A CN111255598A CN201811452940.9A CN201811452940A CN111255598A CN 111255598 A CN111255598 A CN 111255598A CN 201811452940 A CN201811452940 A CN 201811452940A CN 111255598 A CN111255598 A CN 111255598A
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- cooler
- water
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- outlet
- inlet
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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
- F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
- F02M26/32—Liquid-cooled heat exchangers
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
The invention discloses a cooler for an EGR system and an engine assembly with the EGR system, wherein the cooler comprises: an outer housing; an inner shell disposed inside the outer shell and spaced apart from at least a portion of the outer shell to form a cooling cavity; wherein be provided with cooler air inlet, cooler gas vent and comdenstion water export on the interior casing, the cooler air inlet links to each other with the exhaust manifold of engine, the cooler gas vent links to each other with the throttle valve of engine, the comdenstion water export with wear to establish the condenser pipe of shell body links to each other, still be provided with on the shell body with coolant liquid import and the coolant liquid export of cooling chamber intercommunication. According to the cooler provided by the invention, the temperature of the waste gas can be quickly and effectively reduced, so that the water in the waste gas is analyzed, and the problem that the service life of the intercooler is influenced because the water is separated out after the waste gas passes through the intercooler is avoided.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a cooler for an EGR (exhaust gas recirculation) system and an engine assembly with the EGR system.
Background
The engine EGR system is external EGR, and exhaust gas after a catalyst is introduced into an engine cylinder through a supercharger, an intake intercooler and a throttle valve before being introduced into an intake supercharger. After the waste gas is cooled by intercooling, a lot of water is separated out. The cooled EGR is below 40 ℃ at its cooler exit temperature. Much lower than conventional EGR70-150 ℃. However, water drops are formed after the exhaust gas is cooled at low temperature, and if the water enters the engine in a liquid state, the friction of a valve seat ring is increased, the friction of a piston and a cylinder wall is increased, and the service life of the engine is influenced. The engine EGR system is external EGR, and exhaust gas after a catalyst is introduced into an engine cylinder through a supercharger, an intake intercooler and a throttle valve before being introduced into an intake supercharger. After the waste gas is cooled by intercooling, a lot of water is separated out. The cooled EGR is below 40 ℃ at its cooler exit temperature. Much lower than conventional EGR70-150 ℃. However, water drops are formed after the exhaust gas is cooled at low temperature, and if the water enters the engine in a liquid state, the friction of a valve seat ring is increased, the friction of a piston and a cylinder wall is increased, and the service life of the engine is influenced.
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 a cooler for an EGR system.
The invention also provides an engine assembly with the cooler.
A cooler for an EGR system, comprising: an outer housing; an inner shell disposed inside the outer shell and spaced apart from at least a portion of the outer shell to form a cooling cavity; wherein be provided with cooler air inlet, cooler gas vent and comdenstion water export on the interior casing, the cooler air inlet links to each other with the exhaust manifold of engine, the cooler gas vent links to each other with the throttle valve of engine, the comdenstion water export with wear to establish the condenser pipe of shell body links to each other, still be provided with on the shell body with coolant liquid import and the coolant liquid export of cooling chamber intercommunication.
Further, a flow direction of the exhaust gas between the cooler air inlet and the cooler air outlet is different from a flow direction of the cooling liquid between the cooling liquid inlet and the cooling liquid outlet.
Further, a flow direction of the exhaust gas between the cooler inlet port and the cooler outlet port is opposite to a flow direction of the cooling liquid between the cooling liquid inlet port and the cooling liquid outlet port.
Further, the cooler air inlet and the cooling liquid outlet are located at one end of the cooler on the same side, and the cooler air outlet and the cooling liquid inlet are located at the other end of the cooler on the same side.
Further, the bottom wall of the inner case is at least partially depressed downward to form a depressed portion on which the condensed water outlet is provided.
Further, the inner shell is a plurality of, and is a plurality of the inner shell sets up side by side in the shell.
An engine assembly having an EGR system comprising: an engine having a throttle and an exhaust manifold; in the cooler, the air inlet of the cooler is connected with the exhaust manifold, the air outlet of the cooler is connected with the throttle valve, and the cooler is suitable for cooling at least part of high-temperature exhaust gas exhausted from the exhaust manifold so as to separate out moisture from the high-temperature exhaust gas.
Further, the engine assembly further includes: and the water inlet of the water storage tank is connected with the condensed water outlet.
Further, the water inlet of water storage tank with be provided with the condensate water valve between the comdenstion water export, the condensate water valve includes: a water storage cavity; condensate water valve water inlet and condensate water valve outlet, condensate water valve water inlet with the comdenstion water export links to each other, condensate water valve outlet with the water inlet of water storage tank links to each other, the condensate water valve is constructed as with the water storage chamber selectively with condensate water valve water inlet with one intercommunication in the condensate water valve outlet.
Further, the condensate water valve includes: the valve shell is provided with the condensate water valve water inlet, the condensate water valve water outlet, a first opening suitable for communicating the condensate water valve water inlet with the water storage cavity and a second opening suitable for communicating the condensate water valve water outlet with the water storage cavity; a valve spool slidably disposed within the valve housing to selectively block the first opening or the second opening.
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 engine assembly according to an embodiment of the present disclosure;
FIG. 2 is a schematic view of a chiller according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a cooler according to an embodiment of the present invention;
FIG. 4 is a cross-sectional view taken along A-A of FIG. 3;
FIG. 5 is a schematic view of a condensate water valve (with a valve plug blocking a first opening) according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a condensation water valve (with a valve element blocking a second opening) according to an embodiment of the invention.
Reference numerals:
the engine assembly (100) is provided with a motor,
the engine (2) is driven by a motor,
the water storage tank 3, the water inlet 107,
the condensed water valve 4, the valve casing 41, the valve core 42, the water storage cavity 401, the condensed water valve water inlet 402, the condensed water valve water outlet 403, the first opening 404 and the second opening 405.
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.
A cooler 1 for an EGR system according to an embodiment of the present invention is described below with reference to fig. 1 to 6.
The cooler 1 according to an embodiment of the present invention may include an outer shell 11 and an inner shell 12.
The inner shell 12 is arranged in the outer shell 11, the inner shell 12 is spaced apart from at least part of the outer shell 11 to form a cooling cavity 101, flowing cooling liquid can be filled in the cooling cavity 101, high-temperature EGR exhaust gas can pass through the inner shell 12, the cooling liquid in the cooling cavity 101 can exchange heat with the exhaust gas in the inner shell 12, and the cooling liquid takes away part of the exhaust gas in the inner shell 12, so that the temperature of the exhaust gas is reduced. It should be noted that the cooling fluid flowing through the cooling chamber 101 is provided by the vehicle cooling system.
Because the temperature of waste gas reduces, steam in the waste gas can be appeared to condense into the comdenstion water, and the comdenstion water can be discharged from interior casing 12, and then cooler 1 can play the effect of dry waste gas, has avoided waste gas to have the comdenstion water to appear in the intercooler.
Specifically, as shown in fig. 2 to 4, the inner casing 12 is provided with a cooler air inlet 102, a cooler air outlet 103, and a condensed water outlet 104, the cooler air inlet 102 is connected to an exhaust manifold of the engine, the cooler air outlet 103 is connected to a throttle valve of the engine, and the condensed water outlet 104 is connected to a condenser pipe penetrating the outer casing 11. Thus, exhaust gas discharged from an exhaust manifold of the engine can enter the cooling chamber 101 through at least the cooler inlet 102, and after moisture is precipitated in the cooling chamber 101, the exhaust gas can be discharged from the cooler outlet 103 and enter a throttle valve of the engine, and precipitated condensed water can be discharged from the condensed water outlet 104.
The outer shell 11 is further provided with a cooling liquid inlet 105 and a cooling liquid outlet 106 which are communicated with the cooling cavity 101, and cooling liquid can enter the cooling cavity 101 from the cooling liquid inlet 105, then take part of heat of the exhaust gas away, and then be discharged from the cooling liquid outlet 106. It should be noted that the cooling chamber 101 may be connected to a liquid inlet of the heat sink and a liquid outlet of the cooler 1, and specifically, the cooling liquid inlet 105 may be connected to a liquid outlet of the heat sink, and the cooling liquid outlet 106 may be connected to a liquid inlet of the heat sink, and the heat sink may be used for cooling the cooling liquid discharged from the cooling chamber 101.
According to the engine provided by the embodiment of the invention, the cooler 1 can quickly and effectively reduce the temperature of the exhaust gas, so that the water in the exhaust gas is analyzed, and the problem that the service life of an intercooler is influenced because the water is separated out after the exhaust gas passes through the intercooler is avoided.
In some embodiments of the present invention, as shown in fig. 2 and 3, the flow direction of the exhaust gas between the cooler inlet 102 and the cooler outlet 103 is different from the flow direction of the cooling fluid between the cooling fluid inlet 105 and the cooling fluid outlet 106. Therefore, the exhaust gas can be cooled more uniformly and rapidly, the temperature of the exhaust gas is reduced, and moisture in the exhaust gas is separated out.
Further, the flow direction of the exhaust gas between the cooler inlet 102 and the cooler outlet 103 is opposite to the flow direction of the cooling liquid between the cooling liquid inlet 105 and the cooling liquid outlet 106. This further accelerates the cooling rate of the exhaust gas, thereby rapidly analyzing the water in the exhaust gas.
Specifically, the cooler air inlet 102 and the cooling liquid outlet 106 are located at one end of the cooler 1 on the same side, and the cooler air outlet 103 and the cooling liquid inlet 105 are located at the other end of the cooler 1 on the same side.
The structure of the cooler 1 in the embodiment of the present invention is described in detail below with reference to fig. 2 and 3.
The shape of the inner housing 12 is similar to the shape of the outer housing 11, the inner housing 12 and the outer housing 11 being spaced apart to form a cooling chamber 101, the inner housing 12 being considered as a reduced version of the outer housing 11. The cooler inlet 102 is located at the right end of the inner housing 12, the cooler outlet 103 is located at the left end of the inner housing 12, while the coolant inlet 105 is located at the left end of the outer housing 11 and the coolant outlet 106 is located at the right end of the outer housing 11. Thereby, it is achieved that the flow direction of the exhaust gas between the cooler inlet 102 and the cooler outlet 103 differs from the flow direction of the cooling liquid between the cooling liquid inlet 105 and the cooling liquid outlet 106.
Further, the coolant inlet 105 is located at a lower side of the outer housing 11 near the cooler exhaust port 103, and the coolant outlet 106 is located at an upper side of the outer housing 11 near the cooler intake port 102. Thus, interference between the pipeline connecting the coolant inlet 105 and the pipeline connecting the cooler exhaust port 103, and interference between the pipeline connecting the coolant outlet 106 and the pipeline connecting the cooler inlet 102 can be effectively avoided.
According to some embodiments of the present invention, the bottom wall of the inner case 12 is at least partially recessed downward to form a recess 121, and the condensed water outlet 104 may be provided on the recess 121. Therefore, after the moisture in the exhaust gas is condensed into condensed water, the condensed water can be discharged from the condensed water outlet 104 under the action of self gravity.
Further, the recess 121 is configured as an inverted triangle structure, and the condensed water outlet 104 may be disposed at the lowest point of the triangle structure, thereby ensuring that the condensed water can be entirely discharged from the condensed water outlet 104.
In some embodiments of the present invention, the inner housing 12 is plural, and the plural inner housings 12 are arranged side by side in the outer housing 11. Thereby, the cooling efficiency of the cooler 1 is improved, while the temperature of the exhaust gas can be lowered more quickly. Preferably, the plurality of inner housings 12 are spaced apart from one another, ensuring that the coolant can uniformly cool the exhaust gas in the inner housings 12.
The engine assembly 100 having the low-pressure EGR system in the embodiment of the present invention is briefly described below.
As shown in fig. 1, an engine assembly 100 according to an embodiment of the present invention includes an engine 2 and a cooler 1 in the above-described embodiment.
The engine 2 has a throttle valve and an exhaust manifold to which the cooler intake port 102 is connected and the cooler exhaust port 103 is connected, and the cooler 1 is adapted to cool at least part of the high temperature exhaust gas discharged from the exhaust manifold to hydrate the exhaust gas.
The engine assembly 100 according to the embodiment of the present invention further includes a water storage tank 3, and a water inlet 107 of the water storage tank 3 is connected to the condensed water outlet 104. Thus, the condensed water discharged from the cooler 1 can be stored in the water storage tank 3 and can be delivered to the combustion chamber of the engine when necessary.
As shown in fig. 5 to 6, a condensate water valve 4 is disposed between the water inlet of the water storage tank 3 and the condensate outlet 104, and the condensate water valve 4 includes: the condensation water valve comprises a water storage cavity 401, a condensation water valve water inlet 402 and a condensation water valve water outlet 403, wherein the condensation water valve water inlet 402 is connected with a condensation water outlet 104, the condensation water valve water outlet 403 is connected with a water inlet of the water storage tank, and the condensation water valve is configured to enable the water storage cavity 401 to be selectively communicated with one of the condensation water valve water inlet 402 and the condensation water valve water outlet 403.
That is, when the condensate valve inlet 402 is communicated with the water storage cavity, the condensate valve outlet 403 is not communicated with the water storage cavity, and at this time, the condensate water separated out from the cooler 1 can flow into the water storage cavity, but the condensate water in the water storage cavity cannot be discharged from the condensate valve outlet 403; when the condensate valve water outlet 403 is communicated with the water storage cavity, the condensate valve water inlet 402 is not communicated with the water storage cavity, at this time, the condensate water separated out from the cooler 1 cannot flow to the water storage cavity, but the condensate water in the water storage cavity can be discharged from the condensate valve water outlet 403. Therefore, the EGR pipeline has enough pressure, and the interference to the drivability is avoided.
Specifically, the condensate water valve 4 comprises a valve housing 41 and a valve core 42, wherein the valve housing 41 is provided with a condensate water valve water inlet 402 and a condensate water valve water outlet 403, a first opening 404 suitable for communicating the condensate water valve water inlet 402 with the water storage cavity and a second opening 405 suitable for communicating the condensate water valve water outlet 403 with the water storage cavity, and the valve core is slidably arranged in the valve housing to selectively block the first opening 404 or the second opening 405.
It should be noted that the water storage chamber is defined by a water storage chamber housing, and the sliding direction and the stroke of the valve element 42 in the embodiment of the present invention may be controlled by an ECU of the vehicle.
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. A cooler (1) for an EGR system, characterized by comprising:
an outer housing (11);
an inner shell (12), the inner shell (12) being disposed inside the outer shell (11), and the inner shell (12) being spaced apart from at least a portion of the outer shell (11) to form a cooling cavity (101); wherein
Be provided with cooler air inlet (102), cooler gas vent (103) and comdenstion water export (104) on interior casing (12), cooler air inlet (102) link to each other with the exhaust manifold of engine (2), cooler gas vent (103) link to each other with the throttle valve of engine (2), comdenstion water export (104) with wear to establish the condenser pipe of shell body (11) links to each other, still be provided with on shell body (11) with coolant liquid inlet (105) and coolant liquid outlet (106) of cooling chamber (101) intercommunication.
2. The cooler (1) for an EGR system according to claim 1, characterized in that a flow direction of exhaust gas between the cooler air inlet (102) and the cooler air outlet (103) is different from a flow direction of coolant between the coolant inlet (105) and the coolant outlet (106).
3. The cooler (1) for an EGR system according to claim 2, characterized in that the exhaust gas flow direction between the cooler air inlet (102) and the cooler air outlet (103) is opposite to the coolant flow direction between the coolant inlet (105) and the coolant outlet (106).
4. A cooler (1) for an EGR system according to claim 2 or 3, characterized in that the cooler air inlet (102) and the coolant outlet (106) are located at one end of the cooler on the same side, and the cooler air outlet (103) and the coolant inlet (105) are located at the other end of the cooler on the same side.
5. The cooler (1) for the EGR system according to claim 2 or 3, characterized in that a bottom wall of the inner housing (12) is at least partially recessed downward to form a recess (121), and the condensed water outlet (104) is provided on the recess (121).
6. The cooler (1) for an EGR system according to claim 1, characterized in that the inner housing (12) is plural, and the plural inner housings (12) are provided side by side in the outer housing (11).
7. An engine assembly (100) having an EGR system, comprising:
an engine (2), the engine (2) having a throttle and an exhaust manifold;
the cooler (1) of any one of claims 1-6, said cooler air intake (102) being connected to said exhaust manifold and said cooler air exhaust (103) being connected to said throttle valve, said cooler being adapted to cool at least a portion of hot exhaust gases exiting said exhaust manifold to drive said hot exhaust gases out of moisture.
8. The engine assembly (100) with the EGR system of claim 7, further comprising: a water inlet (107) of the water storage tank (3) is connected with the condensed water outlet (104).
9. The engine assembly (100) with the EGR system of claim 8, wherein a condensate water valve (4) is disposed between the water inlet (107) of the water storage tank (3) and the condensate outlet (104), the condensate water valve (4) comprising:
a water storage cavity (401);
condensate water valve water inlet (402) and condensate water valve outlet (403), condensate water valve water inlet (402) with condensate water export (104) links to each other, condensate water valve outlet (403) with water inlet (107) of water storage tank (3) link to each other, condensate water valve (4) are constructed as will water storage chamber (401) selectively with condensate water valve water inlet (402) with one in the condensate water valve outlet (403) communicates.
10. The engine assembly (100) with the EGR system of claim 9 wherein the condensate water valve (4) comprises:
a valve housing (41), wherein the condensed water valve water inlet (402) and the condensed water valve water outlet (403) are arranged on the valve housing (41), and a first opening (404) suitable for communicating the condensed water valve water inlet (402) with the water storage cavity (401) and a second opening (405) suitable for communicating the condensed water valve water outlet (403) with the water storage cavity (401) are arranged on the valve housing (41);
a valve spool (42), the valve spool (42) slidably disposed within the valve housing (41) to selectively block the first opening (404) or the second opening (405).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811452940.9A CN111255598A (en) | 2018-11-30 | 2018-11-30 | Cooler for EGR system and engine assembly with EGR system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811452940.9A CN111255598A (en) | 2018-11-30 | 2018-11-30 | Cooler for EGR system and engine assembly with EGR system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111255598A true CN111255598A (en) | 2020-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811452940.9A Pending CN111255598A (en) | 2018-11-30 | 2018-11-30 | Cooler for EGR system and engine assembly with EGR system |
Country Status (1)
| Country | Link |
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| CN (1) | CN111255598A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112377339A (en) * | 2020-12-01 | 2021-02-19 | 广西玉柴机器股份有限公司 | Method and system for separating water vapor from EGR waste gas |
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| CN202194719U (en) * | 2011-08-10 | 2012-04-18 | 潍柴动力股份有限公司 | Automatic draining device for condensed water of intercooler |
| CN204783336U (en) * | 2015-02-10 | 2015-11-18 | 临海市伟达汽车部件有限公司 | Board -like EGR cooler of spiral baffling |
| CN205370797U (en) * | 2016-01-09 | 2016-07-06 | 潍柴动力股份有限公司 | But EGR device of drainage |
| CN107939560A (en) * | 2017-12-28 | 2018-04-20 | 东风商用车有限公司 | EGR cooler integrated with water removal device |
| CN207554226U (en) * | 2017-11-20 | 2018-06-29 | 上海汽车集团股份有限公司 | Low pressure exhaust gas recycling ICS intercooler system with condensed water discharge function |
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2018
- 2018-11-30 CN CN201811452940.9A patent/CN111255598A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202194719U (en) * | 2011-08-10 | 2012-04-18 | 潍柴动力股份有限公司 | Automatic draining device for condensed water of intercooler |
| CN204783336U (en) * | 2015-02-10 | 2015-11-18 | 临海市伟达汽车部件有限公司 | Board -like EGR cooler of spiral baffling |
| CN205370797U (en) * | 2016-01-09 | 2016-07-06 | 潍柴动力股份有限公司 | But EGR device of drainage |
| CN207554226U (en) * | 2017-11-20 | 2018-06-29 | 上海汽车集团股份有限公司 | Low pressure exhaust gas recycling ICS intercooler system with condensed water discharge function |
| CN107939560A (en) * | 2017-12-28 | 2018-04-20 | 东风商用车有限公司 | EGR cooler integrated with water removal device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112377339A (en) * | 2020-12-01 | 2021-02-19 | 广西玉柴机器股份有限公司 | Method and system for separating water vapor from EGR waste gas |
| CN112377339B (en) * | 2020-12-01 | 2023-12-15 | 广西玉柴机器股份有限公司 | Method and system for separating water vapor in EGR (exhaust gas recirculation) exhaust gas |
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Application publication date: 20200609 |