CN105443274A - Multi-level cooling EGR cooling system - Google Patents
Multi-level cooling EGR cooling system Download PDFInfo
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- CN105443274A CN105443274A CN201510896954.XA CN201510896954A CN105443274A CN 105443274 A CN105443274 A CN 105443274A CN 201510896954 A CN201510896954 A CN 201510896954A CN 105443274 A CN105443274 A CN 105443274A
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- Prior art keywords
- electromagnetic valve
- cooling water
- egr
- channel electromagnetic
- exhaust gas
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- 238000001816 cooling Methods 0.000 title claims abstract description 52
- 239000000498 cooling water Substances 0.000 claims abstract description 72
- 239000002912 waste gas Substances 0.000 claims abstract description 35
- 239000007789 gas Substances 0.000 claims description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000009826 distribution Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Landscapes
- Exhaust-Gas Circulating Devices (AREA)
Abstract
The invention relates to the field of EGR coolers, and discloses a multi-level cooling EGR cooling system. The multi-level cooling EGR cooling system comprises an EGR cooler, a multi-channel electromagnetic valve and an electronic control unit. A waste gas inlet pipe and a waste gas outlet pipe are arranged at the two ends of the EGR cooler respectively. A plurality of cooling water inlet pipes are sequentially arranged from the waste gas inlet pipe end to the waste gas outlet pipe end on the lower side wall of the EGR cooler. A cooling water outlet pipe is arranged at the position, close to the waste gas outlet pipe end, of the upper side wall of the EGR cooler. The multi-channel electromagnetic valve comprises an inlet and a plurality of outlets. The inlet of the multi-channel electromagnetic valve is connected with an engine cooling water taking pipe. The outlets of the multi-channel electromagnetic valve are correspondingly connected with the cooling water inlet pipes in a one-to-one manner. The electronic control unit is connected with the multi-channel electromagnetic valve. The electronic control unit is used for receiving engine rotating speed signals and torque signals to control the aperture of the multi-channel electromagnetic valve. By means of the multi-level cooling EGR cooling system, the EGR cooler can have the multi-level cooling capacity.
Description
Technical field
The present invention relates to cooler for recycled exhaust gas technical field, particularly relate to a kind of multistage cooling EGR cooling system that can realize multistage cooling.
Background technique
EGR (ExhaustGasRecirculatio): EGR, a part for combustion gas is separated by internal-combustion engine after combustion, and imports the technology that air inlet side makes it burn once again.
At present, adopt EGR technology to meet the motor of emission request, mostly adopt in EGR cold, in egr system, cooler for recycled exhaust gas is installed, the temperature of EGR waste gas is high at high-speed high-load working temperature, flow is large, low in low speed small load condition temperature, flow is little.Generally for and ensure that EGR exhaust gas temperature is unlikely to too high, the cooler for recycled exhaust gas cooling capacity of design is all comparatively strong, causes during low speed Smaller load and occurs that EGR exhaust gas temperature crosses cold situation.
Currently used cooler for recycled exhaust gas, after design typification, cooling capacity is also corresponding fixing, well can not take into account each operating conditions of motor to the requirement of EGR exhaust gas temperature.
As shown in Figure 1, cooler for recycled exhaust gas only has a cooling water inlet pipe 6 ' and a cooling water outlet pipe 3, and two ends are respectively equipped with exhaust inlet pipe 1 and waste gas steam outlet pipe 4; Cooler for recycled exhaust gas only has a cooling water inlet pipe 6 ' can not control to enter the cooling water inflow of cooler for recycled exhaust gas, can not control EGR exhaust gas temperature, easily occur that EGR exhaust gas temperature is too high during large load at a high speed, easily make EGR exhaust gas temperature too low during low speed Smaller load, affect the Performance And Reliability of egr system and motor.
The patent No. 201420457336.6, discloses a kind of cooler for recycled exhaust gas water flow control device, uses an elastic mechanism UNICOM high-pressure intake pipe and low pressure intake pipe, controls to enter EGR cooling water flow; But use elastic device to control the water yield, can not carry out intelligent control according to engine operating condition, control accuracy is low.The patent No. 201410397347.4, discloses the controlling method of a kind of egr system and cold rear intake temperature thereof, and this system adds multiple bypass passageways on the basis of existing egr system, system complex.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention how realizes the control to cooler for recycled exhaust gas cooling capacity by rational system, makes a cooler for recycled exhaust gas have multistage cooling capacity.
(2) technological scheme
In order to solve the problems of the technologies described above, the invention provides a kind of multistage cooling EGR cooling system, it comprises cooler for recycled exhaust gas, multi-channel electromagnetic valve and electronic control unit, the two ends of described cooler for recycled exhaust gas are respectively equipped with exhaust inlet pipe and waste gas steam outlet pipe, the lower wall of described cooler for recycled exhaust gas pipe end of giving vent to anger from described gas inlet pipe end to described waste gas is provided with multiple cooling water inlet pipe successively, the upper side wall of described cooler for recycled exhaust gas is provided with cooling water outlet pipe near described waste gas pipe end of giving vent to anger, described multi-channel electromagnetic valve comprises an entrance and multiple outlet, the entrance of described multi-channel electromagnetic valve is connected with engine cooling water intake pipe, multiple outlet and multiple described cooling water inlet pipe of described multi-channel electromagnetic valve connect one to one, described electronic control unit is connected with described multi-channel electromagnetic valve, described electronic control unit is for receiving engine rotational speed signal and torque signal, thus the aperture of described multi-channel electromagnetic valve is controlled according to engine operation condition.
Wherein, described electronic control unit is provided with solenoid valve control module, and described solenoid valve control module is connected with described multi-channel electromagnetic valve.
Wherein, the upper side wall of described cooler for recycled exhaust gas is set to be inclined upwardly towards described waste gas pipe end of giving vent to anger.
Wherein, the inside of described cooler for recycled exhaust gas is provided with exhaust steam passage, and described exhaust steam passage is communicated with waste gas steam outlet pipe with described exhaust inlet pipe respectively.
(3) beneficial effect
Compared with prior art, the present invention has the following advantages:
The multistage cooling EGR cooling system of one provided by the invention, adopt and be provided with multiple cooling water inlet pipe successively at the lower wall of cooler for recycled exhaust gas pipe end of giving vent to anger from gas inlet pipe end to waste gas, the upper side wall of described cooler for recycled exhaust gas is provided with cooling water outlet pipe near described waste gas pipe end of giving vent to anger, multi-channel electromagnetic valve comprises an entrance and multiple outlet, the entrance of described multi-channel electromagnetic valve is connected with engine cooling water intake pipe, multiple outlet and multiple described cooling water inlet pipe of described multi-channel electromagnetic valve connect one to one, described electronic control unit is connected with described multi-channel electromagnetic valve, described electronic control unit is for receiving engine rotational speed signal and torque signal, thus the aperture of described multi-channel electromagnetic valve is controlled according to engine operation condition.Therefore according to multi-channel electromagnetic valve different opening, engine cooling water intake pipe and the different UNICOMs mode of the multiple intake pipe of cooler for recycled exhaust gas can be realized, realize distributing EGR cooling water flow, and then make a cooler for recycled exhaust gas have multistage cooling capacity.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of cooler for recycled exhaust gas of prior art;
Fig. 2 is the structural representation of the multistage cooling EGR cooling system of the embodiment of the present invention 1;
Fig. 3 is the cooling water channel flow graph that the waste gas of embodiment 1 needs when cooling by force;
Fig. 4 be embodiment 1 waste gas need minimum cooling time cooling water channel flow graph;
Fig. 5 is the waste gas of embodiment 1 cooling water channel flow graph when needing medium cooling;
Fig. 6 is the structural representation of the multistage cooling EGR cooling system of embodiment 2;
Fig. 7 is the structural representation of the multistage cooling EGR cooling system of embodiment 3.
In figure: 1: exhaust inlet pipe 1; 2:EGR cooler 2; 2 ': the upper side wall of described cooler for recycled exhaust gas; 3: cooling water outlet pipe 3; 4: waste gas steam outlet pipe 4; 5: exhaust steam passage 5; 6: the first cooling water inlet pipes 6; 6 ': cooling water inlet pipe; 7: the second cooling water inlet pipes 7; 8: engine cooling water intake pipe 8; 9: multi-channel electromagnetic valve 9; 10: solenoid valve control module 10; 11: electronic control unit 11; 12: tach signal 12; 13: torque signal 13; 14: the three cooling water inlet pipes 14; N: the n-th cooling water inlet pipe.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following instance for illustration of the present invention, but is not used for limiting the scope of the invention.
In describing the invention, it should be noted that, term " " center ", " longitudinal direction ", " transverse direction ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", orientation or the position relationship of the instruction such as " outward " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.In addition, term " first ", " second ", " the 3rd " etc. only for describing object, and can not be interpreted as instruction or hint relative importance.
In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, concrete condition above-mentioned term concrete meaning in the present invention can be understood.
In addition, in describing the invention, except as otherwise noted, the implication of " multiple ", " many ", " many groups " is two or more.
Embodiment 1
As shown in Figure 2, for the multistage cooling EGR cooling system of one provided by the invention, it comprises cooler for recycled exhaust gas 2, multi-channel electromagnetic valve 9 and electronic control unit 11 (ECU), the two ends of described cooler for recycled exhaust gas 2 are respectively equipped with exhaust inlet pipe 1 and waste gas steam outlet pipe 4, the inside of described cooler for recycled exhaust gas 2 is provided with exhaust steam passage 5, described exhaust steam passage 5 is communicated with waste gas steam outlet pipe 4 with described exhaust inlet pipe 1 respectively, the lower wall of described cooler for recycled exhaust gas 2 is provided with multiple cooling water inlet pipe from described exhaust inlet pipe 1 end successively to described waste gas steam outlet pipe 4 end, preferably be provided with two cooling water inlet pipes, be respectively the first cooling water inlet pipe 6 and the second cooling water inlet pipe 7, the upper side wall of described cooler for recycled exhaust gas 2 is provided with cooling water outlet pipe 3 near described waste gas steam outlet pipe 4 end, described multi-channel electromagnetic valve 9 comprises an entrance and multiple outlet, the entrance of described multi-channel electromagnetic valve 9 is connected with engine cooling water intake pipe 8, to provide cooling water by engine cooling water intake pipe 8 to cooling water inlet pipe, multiple outlet and multiple described cooling water inlet pipe of described multi-channel electromagnetic valve 9 connect one to one, described electronic control unit 11 is connected with described multi-channel electromagnetic valve 9, described electronic control unit 11 determines the operating conditions of motor for receiving engine rotational speed signal 12 and torque signal 13, thus the aperture of described multi-channel electromagnetic valve 9 is controlled according to engine operation condition, the different opening of multi-channel electromagnetic valve 9 is controlled according to the different operating conditionss of motor, thus realize the different distributions of water flow in cooler for recycled exhaust gas 2, and then the multistage cooling realized EGR waste gas, ensure rational EGR exhaust gas temperature.
Particularly, engine cooling water intake pipe 8 and described first cooling water inlet pipe 6 UNICOM separately can be realized respectively according to multi-channel electromagnetic valve 9 different opening; Engine cooling water intake pipe 8 and the second cooling water inlet pipe 7 UNICOM separately; Engine cooling water intake pipe 8 and the first cooling water inlet pipe 6, second cooling water inlet pipe 7 UNICOM simultaneously, and according to the aperture of multi-channel electromagnetic valve 9, the different proportion of water flow in the first cooling water inlet pipe 6, second cooling water inlet pipe 7 can be realized.
Described electronic control unit 11 is provided with solenoid valve control module 10, and described solenoid valve control module 10 is connected with described multi-channel electromagnetic valve 9.Electronic control unit 11, according to the operating conditions of motor, is controlled by the aperture of solenoid valve control module 10 pairs of multi-channel electromagnetic valves 9, and then realizes the control to water flow in cooler for recycled exhaust gas 2, realizes the multistage cooling to EGR waste gas.
The upper side wall 2 ' of described cooler for recycled exhaust gas is set to be inclined upwardly towards described waste gas steam outlet pipe 4 end, the bubble that may exist in cooler for recycled exhaust gas 2 can be released outside cooler for recycled exhaust gas 2.
As shown in Figure 3, when motor operates in high speed high load working condition, EGR exhaust gas temperature is very high, cooler for recycled exhaust gas 2 is needed to have strong cooling capacity, solenoid valve control module 10 controls multi-channel electromagnetic valve 9 aperture and realizes engine cooling water intake pipe 8 UNICOM independent with the first cooling water inlet pipe 6 of cooler for recycled exhaust gas 2, realize the strong cooling capacity of cooler for recycled exhaust gas 2, ensure that EGR exhaust gas temperature is no more than the maximum temperature of system requirements, ensure that the reliability of the emission performance of motor, egr system and engine components all meets the demands.
As shown in Figure 4, when motor operates in low speed and load operating mode, EGR exhaust gas temperature is low, cooler for recycled exhaust gas 2 cooling capacity needed is weak, solenoid valve control module 10 controls multi-channel electromagnetic valve 9 aperture and realizes engine cooling water intake pipe 8 and the second cooling water inlet pipe 7 UNICOM separately of cooler for recycled exhaust gas 2, realizes the cooling capacity that cooler for recycled exhaust gas 2 is minimum, ensures that EGR exhaust gas temperature is no more than the minimum temperature of system requirements, avoid egr system carbon distribution, gum deposit, ensure egr system reliability.
As shown in Figure 5, when motor operates in moderate rotation moderate duty operating mode, EGR exhaust gas temperature is moderate, the EGR cooling capacity needed is also moderate, solenoid valve control module 10 controls the first cooling water inlet pipe 6 that multi-channel electromagnetic valve 9 aperture realizes engine cooling water intake pipe 8 and cooler for recycled exhaust gas 2, second cooling water inlet pipe 7 is UNICOM simultaneously, and by the different opening of multi-channel electromagnetic valve 9, realize the different allocation proportions of the first cooling water inlet pipe 6 and cooling water flow in the second cooling water inlet pipe 7, realize the multistage cooling to EGR waste gas, ensure that EGR exhaust gas temperature meets the requirement of engine performance and discharge under each operating mode.
When the solenoid valve control module 10 of motor or multi-channel electromagnetic valve 9 break down, when can not realize controlling multi-channel electromagnetic valve 9 aperture, multi-channel electromagnetic valve 9 keeps the first cooling water inlet pipe 6 Chang Liantong with cooler for recycled exhaust gas 2, ensure the strongest to the cooling capacity of EGR waste gas, temperature is no more than system maximum permissible value, ensures the reliability of egr system and engine components.
Embodiment 2
Embodiment 2 is with the difference of embodiment 1, as required, as shown in Figure 6, the lower wall of described cooler for recycled exhaust gas 2 is provided with three cooling water inlet pipes from described exhaust inlet pipe 1 end successively to described waste gas steam outlet pipe 4 end, respectively the first cooling water inlet pipe 6, second cooling water inlet pipe 7 and the 3rd cooling water inlet pipe 14.
Embodiment 3
Embodiment 3 is with the difference of embodiment 1, as required, as shown in Figure 7, the lower wall of described cooler for recycled exhaust gas 2 is provided with n (n >=3) individual cooling water inlet pipe from described exhaust inlet pipe 1 end successively to described waste gas steam outlet pipe 4 end, be respectively the first cooling water inlet pipe 6, second cooling water inlet pipe the 7, three cooling water inlet pipe 14 ... n-th cooling water inlet pipe n.
As can be seen from the above embodiments, the present invention controls the aperture of described multi-channel electromagnetic valve 9 according to engine operation condition, the different opening of multi-channel electromagnetic valve 9 is controlled according to the different operating conditionss of motor, thus realize the different distributions of water flow in cooler for recycled exhaust gas 2, and then the multistage cooling realized EGR waste gas, ensure rational EGR exhaust gas temperature.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. a multistage cooling EGR cooling system, it is characterized in that, comprise cooler for recycled exhaust gas, multi-channel electromagnetic valve and electronic control unit, the two ends of described cooler for recycled exhaust gas are respectively equipped with exhaust inlet pipe and waste gas steam outlet pipe, the lower wall of described cooler for recycled exhaust gas pipe end of giving vent to anger from described gas inlet pipe end to described waste gas is provided with multiple cooling water inlet pipe successively, the upper side wall of described cooler for recycled exhaust gas is provided with cooling water outlet pipe near described waste gas pipe end of giving vent to anger, described multi-channel electromagnetic valve comprises an entrance and multiple outlet, the entrance of described multi-channel electromagnetic valve is connected with engine cooling water intake pipe, multiple outlet and multiple described cooling water inlet pipe of described multi-channel electromagnetic valve connect one to one, described electronic control unit is connected with described multi-channel electromagnetic valve, described electronic control unit is for receiving engine rotational speed signal and torque signal, thus the aperture of described multi-channel electromagnetic valve is controlled according to engine operation condition.
2. multistage cooling EGR cooling system according to claim 1, it is characterized in that, described electronic control unit is provided with solenoid valve control module, and described solenoid valve control module is connected with described multi-channel electromagnetic valve.
3. multistage cooling EGR cooling system according to claim 1, is characterized in that, the upper side wall of described cooler for recycled exhaust gas is set to be inclined upwardly towards described waste gas pipe end of giving vent to anger.
4. multistage cooling EGR cooling system according to claim 1, it is characterized in that, the inside of described cooler for recycled exhaust gas is provided with exhaust steam passage, and described exhaust steam passage is communicated with waste gas steam outlet pipe with described exhaust inlet pipe respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510896954.XA CN105443274B (en) | 2015-12-07 | 2015-12-07 | Multistage cooling cooling system for recycled exhaust gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510896954.XA CN105443274B (en) | 2015-12-07 | 2015-12-07 | Multistage cooling cooling system for recycled exhaust gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105443274A true CN105443274A (en) | 2016-03-30 |
| CN105443274B CN105443274B (en) | 2018-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510896954.XA Expired - Fee Related CN105443274B (en) | 2015-12-07 | 2015-12-07 | Multistage cooling cooling system for recycled exhaust gas |
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| CN (1) | CN105443274B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018010593A1 (en) * | 2016-07-15 | 2018-01-18 | 联合汽车电子有限公司 | Egr cooler |
| CN111255595A (en) * | 2018-11-30 | 2020-06-09 | 长城汽车股份有限公司 | Engine system and vehicle with low pressure EGR |
| CN112377338A (en) * | 2020-11-04 | 2021-02-19 | 哈尔滨工程大学 | Wide watershed three-stage adjustable exhaust gas recirculation system |
| CN112392630A (en) * | 2020-11-18 | 2021-02-23 | 中国煤炭科工集团太原研究院有限公司 | Novel intelligent controllable waste gas circulation device for mine and control method |
| CN112963271A (en) * | 2021-03-19 | 2021-06-15 | 广西玉柴机器股份有限公司 | EGR system with intelligent thermal management |
| CN114000960A (en) * | 2020-07-28 | 2022-02-01 | 广州汽车集团股份有限公司 | EGR system and car |
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| CN202628318U (en) * | 2012-07-05 | 2012-12-26 | 东风汽车有限公司 | Engine air inlet pipe integrated with EGR (exhaust gas Recirculation) air outlet pipe |
| JP2013086756A (en) * | 2011-10-21 | 2013-05-13 | Daimler Ag | Cooling system for hybrid vehicle |
| JP2014020345A (en) * | 2012-07-23 | 2014-02-03 | Denso Corp | Egr system |
| CN103775252A (en) * | 2014-01-22 | 2014-05-07 | 东风商用车有限公司 | Intelligent cooling device of supercharged diesel engine EGR system |
| CN104564434A (en) * | 2013-10-18 | 2015-04-29 | 中国重汽集团济南动力有限公司 | EGR (exhaust gas recirculation) engine assembly |
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2015
- 2015-12-07 CN CN201510896954.XA patent/CN105443274B/en not_active Expired - Fee Related
Patent Citations (5)
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| JP2013086756A (en) * | 2011-10-21 | 2013-05-13 | Daimler Ag | Cooling system for hybrid vehicle |
| CN202628318U (en) * | 2012-07-05 | 2012-12-26 | 东风汽车有限公司 | Engine air inlet pipe integrated with EGR (exhaust gas Recirculation) air outlet pipe |
| JP2014020345A (en) * | 2012-07-23 | 2014-02-03 | Denso Corp | Egr system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018010593A1 (en) * | 2016-07-15 | 2018-01-18 | 联合汽车电子有限公司 | Egr cooler |
| CN107620656A (en) * | 2016-07-15 | 2018-01-23 | 联合汽车电子有限公司 | Cooler for recycled exhaust gas |
| CN111255595A (en) * | 2018-11-30 | 2020-06-09 | 长城汽车股份有限公司 | Engine system and vehicle with low pressure EGR |
| CN111255595B (en) * | 2018-11-30 | 2021-06-18 | 长城汽车股份有限公司 | Engine system and vehicle with low pressure EGR |
| CN114000960A (en) * | 2020-07-28 | 2022-02-01 | 广州汽车集团股份有限公司 | EGR system and car |
| CN112377338A (en) * | 2020-11-04 | 2021-02-19 | 哈尔滨工程大学 | Wide watershed three-stage adjustable exhaust gas recirculation system |
| CN112392630A (en) * | 2020-11-18 | 2021-02-23 | 中国煤炭科工集团太原研究院有限公司 | Novel intelligent controllable waste gas circulation device for mine and control method |
| CN112963271A (en) * | 2021-03-19 | 2021-06-15 | 广西玉柴机器股份有限公司 | EGR system with intelligent thermal management |
| CN112963271B (en) * | 2021-03-19 | 2024-04-09 | 广西玉柴机器股份有限公司 | EGR system with intelligent thermal management |
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| Publication number | Publication date |
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| CN105443274B (en) | 2018-03-13 |
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