CN111173655A - Method and device for simulating failure of EGR (exhaust gas Recirculation) system of diesel engine - Google Patents
Method and device for simulating failure of EGR (exhaust gas Recirculation) system of diesel engine Download PDFInfo
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- CN111173655A CN111173655A CN202010062289.5A CN202010062289A CN111173655A CN 111173655 A CN111173655 A CN 111173655A CN 202010062289 A CN202010062289 A CN 202010062289A CN 111173655 A CN111173655 A CN 111173655A
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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
- F02M26/49—Detecting, diagnosing or indicating an abnormal function of the EGR system
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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
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
The invention discloses a method for simulating the failure of an EGR (exhaust gas recirculation) system of a diesel engine, which comprises the steps of adjusting the flow of cooling liquid and simulating different cooling states of an EGR cooler; correspondingly measuring the temperatures of an exhaust gas inlet, an exhaust gas outlet and a cooling liquid inlet according to different cooling states of the EGR cooler; and calculating the cooling efficiency of the EGR cooler in different cooling states according to the temperature of the exhaust gas inlet, the temperature of the exhaust gas outlet and the temperature of the cooling liquid inlet. The invention also discloses a device for simulating the failure of the EGR system of the diesel engine. The method for simulating the failure of the EGR system of the diesel engine can simulate the failure state of the EGR cooler, saves the cost of designing and manufacturing failed parts, can be used for evaluating the performance of the EGR cooler in the engine development stage, and can quickly realize the OBD system monitoring function required in national standards.
Description
Technical Field
The invention relates to the technical field of engines, in particular to a method for simulating failure of an EGR (exhaust gas recirculation) system of a diesel engine. The utility model also relates to a device of simulation diesel engine EGR system inefficacy.
Background
Under the requirements of the standards of pollutant emission limit and measurement method for heavy-duty diesel vehicles (sixth stage of china), automobile manufacturers mostly adopt a technical route of additionally installing an EGR system (exhaust gas recirculation system) for heavy-duty diesel engines, and the EGR system belongs to an important component part of emission control, so that the pollutant emission value is reduced to a great extent.
In a vehicle engine, continued operation of an EGR system in a failure state can cause engine emission deterioration and cause serious damage to the vehicle; in the sixth phase of the national standard, an OBD system (on-board emission diagnostic system) requires monitoring of the EGR system, and the OBD system is required to detect a fault when the function of the EGR cooler in the EGR system is completely disabled, so that the cooling capacity designed by a production enterprise cannot be met. At present, most of failure states of an EGR cooler are provided by part manufacturers, the design and manufacturing process of failure parts is time-consuming and labor-consuming, the cost is long, and the cost is high and high; the designed and manufactured fault part has a single cooling effect and cannot simulate various cooling efficiencies. Particularly, when the national motor vehicle inspection center detects the whole vehicle, the failure state of the EGR cooler needs to be simulated quickly, alarm information is given to a driver, and if a large amount of time and energy are spent in the process of designing a fault part, the optimal selection is not realized.
Therefore, how to provide a method for simulating the failure of the diesel engine EGR system, which can simulate various failure states of the EGR cooler, is a technical problem to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide a method for simulating the failure of an EGR system of a diesel engine, which can simulate the failure state of an EGR cooler, save the cost of designing and manufacturing failed parts, can be used for evaluating the performance of the EGR cooler in the development stage of the engine and can quickly realize the OBD system monitoring function required in national standards. It is another object of the present invention to provide an apparatus for simulating a failure of an EGR system of a diesel engine.
In order to achieve the above object, the present invention provides a method for simulating the failure of an EGR system of a diesel engine, comprising adjusting the flow rate of a coolant, and simulating different cooling states of an EGR cooler; correspondingly measuring the temperatures of an exhaust gas inlet, an exhaust gas outlet and a cooling liquid inlet according to different cooling states of the EGR cooler; and calculating the cooling efficiency of the EGR cooler in different cooling states according to the temperature of the exhaust gas inlet, the temperature of the exhaust gas outlet and the temperature of the cooling liquid inlet.
Preferably, the step of adjusting the flow rate of the cooling liquid is to adjust the opening degree of an adjustable valve to change the flow rate of the cooling liquid.
Preferably, after the step of calculating the cooling efficiencies of the EGR cooler in different cooling states, the method further includes recording the cooling efficiency corresponding to the temperature of the exhaust gas outlet greater than a preset upper limit temperature as a preset lower limit efficiency, and alarming when the cooling efficiency is lower than the preset lower limit efficiency.
Preferably, after the step of calculating the cooling efficiency of the EGR cooler in different cooling states, the method further includes recording the opening degree of the adjustable valve corresponding to the temperature of the exhaust gas outlet greater than a preset upper limit temperature as a monitoring requirement of an OBD system.
Preferably, the opening degree of the adjustable valve ranges from fully closed to fully open.
The invention also provides a device for simulating the failure of the EGR system of the diesel engine, and the method for simulating the failure of the EGR system of the diesel engine comprises a coolant liquid device which is connected with the EGR cooler and can adjust the flow of the coolant, and three temperature sensors which are arranged on the EGR cooler and are used for respectively measuring the temperatures of the exhaust gas inlet, the exhaust gas outlet and the coolant inlet.
Preferably, the coolant reservoir comprises a water inlet pipe connected to the EGR cooler for feeding the coolant and an adjustable valve provided in the water inlet pipe.
Compared with the background technology, the method for simulating the failure of the EGR system of the diesel engine comprises three steps, firstly, adjusting the flow of cooling liquid, and simulating different cooling states of an EGR cooler; then, correspondingly measuring the temperatures of the exhaust gas inlet, the exhaust gas outlet and the cooling liquid inlet according to different cooling states of the EGR cooler; finally, the cooling efficiency of the EGR cooler in different cooling states is calculated based on the temperature of the exhaust gas inlet, the temperature of the exhaust gas outlet and the temperature of the coolant inlet. The method for simulating the failure of the EGR system of the diesel engine simulates different cooling states of the EGR cooler by adjusting the flow of the cooling liquid, further measures three temperatures in different cooling states, and further calculates the cooling efficiency in different cooling states; the design and manufacture of failure parts are not needed, the cost of the design and manufacture of the failure parts is saved, the cooling efficiency of the EGR cooler in multiple failure states can be simulated, the alarm efficiency can be further set according to the cooling efficiency so as to facilitate failure monitoring, the system can be used for evaluating the performance of the EGR cooler in the engine development stage, and the OBD system monitoring function required in national standards can be rapidly realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a flow chart of a method of simulating a failure of a diesel engine EGR system provided in accordance with an embodiment of the present invention;
FIG. 2 is a line graph of cooling efficiency provided by an embodiment of the present invention;
FIG. 3 is a block diagram of an apparatus for simulating a failure of an EGR system of a diesel engine according to an embodiment of the present invention.
Wherein:
1-EGR cooler, 101-exhaust gas inlet, 102-exhaust gas outlet, 103-cooling liquid inlet, 104-cooling liquid outlet and 2-adjustable valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to fig. 3, fig. 1 is a flowchart illustrating a method for simulating a failure of an EGR system of a diesel engine according to an embodiment of the present invention, fig. 2 is a line diagram illustrating a cooling efficiency according to an embodiment of the present invention, and fig. 3 is a structural diagram illustrating an apparatus for simulating a failure of an EGR system of a diesel engine according to an embodiment of the present invention.
In a first particular embodiment, the present invention provides a method of simulating a failure of an EGR system of a diesel engine comprising: s1, adjusting the flow of the cooling liquid, and simulating different cooling states of the EGR cooler 1; s2, correspondingly measuring the temperatures of the exhaust gas outlet 102, the coolant inlet 103 and the coolant outlet 104 according to different cooling states of the EGR cooler 1; s3, the cooling efficiency of the EGR cooler 1 in different cooling states is calculated based on the temperatures of the exhaust gas outlet 102, the coolant inlet 103, and the coolant outlet 104.
In passenger vehicles and commercial vehicles, the engine cooling system mostly adopts a water cooling system, different cooling liquid qualities, flow rates and cooling system arrangement modes are selected to generate different effects on cooling performance, and the method mainly realizes the reduction of the cooling performance of the EGR cooler 1 by controlling the flow rate of the cooling liquid.
In the present embodiment, in order to substitute for the way of designing and manufacturing the failed component, the magnitude of the flow rate of the coolant flowing into the EGR cooler 1 is controlled and adjusted in step S1 to simulate a plurality of different cooling states of the EGR cooler 1; in order to calculate the efficiency of the EGR cooler 1 by conversion of the thermal efficiency, the temperatures at the three exhaust gas outlet 102, the coolant inlet 103, and the coolant outlet 104 are measured by the three calibrated temperature sensors in step S2, respectively, and further the cooling efficiency of the EGR cooler 1 is calculated in step S3. Further, after step S3, a line graph of the cooling efficiency of the EGR cooler 1 is drawn, the influence of different cooling states is visually analyzed, and an alarm efficiency limit value can be set appropriately for failure monitoring of the component.
For example, in step S1, the step of adjusting the flow rate of the cooling liquid is to adjust the opening degree of the adjustable valve 2 to change the flow rate of the cooling liquid. In this embodiment, the EGR cooler 1 has a coolant inlet 103 and a coolant outlet 104 for inputting and outputting coolant, the coolant inlet 103 inputs coolant through a water inlet pipe, the flow of the coolant in the water inlet pipe can be adjusted by changing the rotation speed of the water pump, and the flow of the coolant in the water inlet pipe can also be adjusted by setting the adjustable valve 2 on the water inlet pipe.
In this embodiment, install adjustable valve 2 in the inlet tube or the outlet pipe of EGR cooler 1, through adjusting the different valve aperture of adjustable valve 2, the flow size of the coolant liquid that gets into EGR cooler 1 is different, can obtain different cooling effects, then can simulate the inefficacy boundary condition of spare part with the conversion of thermal efficiency, can further trigger alarm information when cooling efficiency is being less than the limit value of settlement, the suggestion driver discovers the problem and handles in time to guarantee that the engine normally works.
TABLE 1 Experimental results for certain engines
The experimental results in table 1 are the experimental data recorded when the engine is operated at a constant operating condition on the engine mount, where T1 corresponds to the temperature at which exhaust gas enters, T2 corresponds to the temperature at which exhaust gas exits, T3 corresponds to the temperature of coolant, and the cooling efficiency is (T1-T2)/(T1-T3). According to the experimental result, a line drawing is drawn so as to more intuitively analyze the influence of the valve opening of the adjustable valve 2 on the cooling efficiency.
Further, after the cooling efficiency is calculated in step S3, the method further includes step S31: recording the cooling efficiency corresponding to the temperature of the exhaust gas outlet 102 which is higher than the preset high limit temperature as the preset low limit efficiency, and alarming when the cooling efficiency is lower than the preset low limit efficiency; after the cooling efficiency is calculated in step S3, a step S32 is further included: and recording the opening degree of the adjustable valve 2 corresponding to the temperature of the exhaust gas outlet 102 which is higher than the preset upper limit temperature as the monitoring requirement of the OBD system.
The opening of the adjustable valve 2 ranges from 0 to 100, i.e. from fully closed to fully open.
In the present embodiment, the preset upper limit temperature may be changed according to different types of engine conditions and actual operating conditions, for example, as shown in table 1, when the valve opening is 35%, the temperature T of the exhaust outlet 102 is analyzed from the experimental data2When the temperature of the exhaust gas outlet 102 reaches 181 ℃, if the temperature continues to rise, the combustion of the engine is deteriorated, the emission exceeds the standard, so that the preset high limit temperature is set to 181 ℃, the cooling efficiency corresponding to the preset high limit temperature is 0.787, so that the preset low limit efficiency is set to 0.787, and when the cooling efficiency drops to 0.787, an alarm is triggered to remind a driver to check whether parts or a cooling liquid pipeline is blocked or not in time; on the other hand, when the national detection center detects the whole vehicle, the monitoring requirement of the OBD system can be realized by adjusting the valve to 35%.
Furthermore, the data can be manually recorded and calculated, a Central Processing Unit (CPU) connected with the temperature sensor can be arranged, and the recording and the calculation of the data are realized through the storage and calculation functions of the CPU; further, an alarm connected with the central processing unit can be arranged to realize the function of alarming, and the alarming form includes but is not limited to whistle and warning light.
It should be noted that the present invention mainly introduces an experimental method for simulating the cooling performance degradation of the EGR cooler 1 in the EGR system, and provides a monitoring method for the OBD system, which can quickly realize the failure and ensure the normal operation of the engine components. Besides, the cost of designing and manufacturing failed parts is saved, the method can be used in the engine development stage, the performance of the EGR cooler 1 can be evaluated, and the OBD system monitoring function required by national standards can be quickly realized.
In the present embodiment, the EGR system: the waste gas recirculation system is used for returning part of waste gas discharged by the engine to an air inlet manifold, and the waste gas and fresh mixed gas enter a cylinder again to participate in combustion, so that NO in tail gas can be effectively reducedxA value; an engine cooling system: the heat absorbed by high-temperature parts when the engine works is taken away in time, and the engine is ensured to work in a normal temperature range. Cooling liquid: a medium for use in an engine cooling system; EGR cooler 1: a means for cooling exhaust gases returning to the engine cylinder; an OBD system: the vehicle-mounted emission diagnosis system is a computer information system arranged on an automobile and an engine, belongs to a pollution control device, and has the following functions of a) diagnosing faults affecting the emission performance of the engine; b) when a fault occurs, displaying the fault through an alarm system; c) the potential failure area is determined by information stored in the memory of the electronic control unit and information is communicated off-line.
The invention also provides a device for simulating the failure of the EGR system of the diesel engine, and the method for simulating the failure of the EGR system of the diesel engine comprises a coolant liquid container and three temperature sensors, wherein the coolant liquid container is connected with the EGR cooler 1 and can adjust the flow of the input coolant, and the three temperature sensors are arranged on the EGR cooler 1 to respectively measure the temperatures of the exhaust gas inlet 101, the exhaust gas outlet 102 and the coolant inlet 103.
Furthermore, the data can be manually recorded and calculated, a central processing unit connected with the temperature sensor can be arranged, and the data can be recorded and calculated through the storage and calculation functions of the central processing unit.
The cooling liquid device can adjust the flow of the cooling liquid in the water inlet pipe by changing the rotating speed of the water pump, and can also adjust the flow of the cooling liquid in the water inlet pipe by arranging the adjustable valve 2 on the water inlet pipe; in a particular embodiment in the form of an adjustable valve 2, the coolant reservoir comprises a water inlet line connected to the EGR cooler 1 and intended for feeding in coolant, and an adjustable valve 2 arranged in the water inlet line.
In this embodiment, the adjustable valve 2 is installed in the water inlet pipe, and three calibrated temperature sensors are installed at three positions of the exhaust gas inlet 101, the exhaust gas outlet 102 and the cooling liquid inlet 103, respectively. The flow of the coolant can be simply and conveniently controlled, so that the effect of simulating different cooling states is achieved. The temperature sensor inputs the measured temperature into the central processing unit, the adjustable valve 2 can input the opening degree of the adjustable valve 2 into the central processing unit in a manual control mode or an electric control mode, the central processing unit can calculate the efficiency of the EGR cooler 1 according to the input opening degree and temperature through thermal efficiency conversion, and an alarm efficiency limit value is reasonably set so as to monitor the failure of parts; further, an alarm connected with the central processing unit can be arranged to realize the alarm function, and the alarm forms include but are not limited to a whistle and a warning lamp. In other words, the above-mentioned alarm system for monitoring the EGR cooler 1 and alarming may be separately provided, or the central processing unit may be directly connected to the existing OBD system, so as to monitor and report errors in the EGR cooler 1 through the OBD system.
The method and the device for simulating the failure of the EGR system of the diesel engine provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (7)
1. A method of simulating a failure of an EGR system of a diesel engine, comprising,
adjusting the flow of the cooling liquid, and simulating different cooling states of the EGR cooler (1);
correspondingly measuring the temperatures of an exhaust gas inlet (101), an exhaust gas outlet (102) and a cooling liquid inlet (103) according to different cooling states of the EGR cooler (1);
-calculating the cooling efficiency of the EGR cooler (1) in different cooling states on the basis of the temperature of the exhaust gas inlet (101), the temperature of the exhaust gas outlet (102) and the temperature of the coolant inlet (103).
2. The method for simulating a failure in an EGR system of a diesel engine as recited in claim 1, wherein the step of adjusting the magnitude of the flow of coolant comprises, in particular,
and adjusting the opening degree of the adjustable valve (2) to change the flow rate of the cooling liquid.
3. The method of simulating a failure of an EGR system of a diesel engine according to claim 2, wherein the step of calculating the cooling efficiency for different cooling states of the EGR cooler (1) is followed by further comprising,
recording the cooling efficiency corresponding to the temperature of the exhaust gas outlet (102) which is higher than the preset upper limit temperature as the preset lower limit efficiency, and alarming when the cooling efficiency is lower than the preset lower limit efficiency.
4. The method of simulating a failure of an EGR system of a diesel engine according to claim 2, wherein the step of calculating the cooling efficiency for different cooling states of the EGR cooler (1) is followed by further comprising,
recording the opening degree of the adjustable valve (2) corresponding to the temperature of the exhaust gas outlet (102) which is higher than the preset upper limit temperature as the monitoring requirement of the OBD system.
5. Method of simulating a failure of an EGR system of a diesel engine according to any of claims 2 to 4, characterized in that the opening of the adjustable valve (2) ranges from fully closed to fully open.
6. Device for simulating the failure of an EGR system of a diesel engine, applying the method for simulating the failure of an EGR system of a diesel engine as claimed in any one of claims 1 to 5, characterized by comprising a coolant reservoir connected to the EGR cooler (1) and sized to regulate the flow of coolant, and three temperature sensors arranged in the EGR cooler (1) and configured to measure the temperature of the exhaust gas inlet (101), the exhaust gas outlet (102) and the coolant inlet (103), respectively.
7. An arrangement for simulating failure of an EGR system of a diesel engine according to claim 6, characterized in that the coolant reservoir comprises a water inlet line connected to the EGR cooler (1) and intended for feeding in coolant, and an adjustable valve (2) arranged in the water inlet line.
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| CN202010062289.5A CN111173655A (en) | 2020-01-19 | 2020-01-19 | Method and device for simulating failure of EGR (exhaust gas Recirculation) system of diesel engine |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112380707A (en) * | 2020-11-18 | 2021-02-19 | 潍柴动力股份有限公司 | Method and device for evaluating cooling performance of EGR cooler and electronic equipment |
| CN114562396A (en) * | 2022-03-28 | 2022-05-31 | 江铃汽车股份有限公司 | Method for verifying reliability of low-temperature working condition of EGR (exhaust gas Recirculation) system |
| CN115217681A (en) * | 2022-07-29 | 2022-10-21 | 潍柴动力股份有限公司 | Control method of EGR system, vehicle and storage medium |
| CN115929518A (en) * | 2022-11-04 | 2023-04-07 | 东风商用车有限公司 | EGR Cooler Fault Early Warning Method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009020804A1 (en) * | 2008-05-27 | 2009-12-24 | GM Global Technology Operations, Inc., Detroit | Control system for internal combustion engine system of vehicles, measures outlet temperature of cooling system and determines cooling performance based on measured outlet temperature and estimated fluid temperature |
| CN102828840A (en) * | 2011-06-13 | 2012-12-19 | 现代自动车株式会社 | Low pressure EGR system and examining method for efficiency of low pressure EGR cooler |
| CN102913345A (en) * | 2012-09-27 | 2013-02-06 | 三一重工股份有限公司 | EGR (exhaust gas recirculation) gas temperature control device, EGR gas temperature control method, engine and engineering machinery |
| CN105223023A (en) * | 2015-09-29 | 2016-01-06 | 安徽江淮汽车股份有限公司 | The detection method of a kind of EGR gas temperature and cooler for recycled exhaust gas cooling effectiveness |
| CN106321296A (en) * | 2016-08-31 | 2017-01-11 | 潍柴动力股份有限公司 | Method and device for adjusting EGR exhaust gas temperature |
| CN106677933A (en) * | 2016-12-27 | 2017-05-17 | 重庆长安汽车股份有限公司 | Water end-controllable EGR cooling system |
| CN206638420U (en) * | 2017-04-12 | 2017-11-14 | 辽宁工业大学 | A kind of cooler for recycled exhaust gas experimental rig |
-
2020
- 2020-01-19 CN CN202010062289.5A patent/CN111173655A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009020804A1 (en) * | 2008-05-27 | 2009-12-24 | GM Global Technology Operations, Inc., Detroit | Control system for internal combustion engine system of vehicles, measures outlet temperature of cooling system and determines cooling performance based on measured outlet temperature and estimated fluid temperature |
| CN102828840A (en) * | 2011-06-13 | 2012-12-19 | 现代自动车株式会社 | Low pressure EGR system and examining method for efficiency of low pressure EGR cooler |
| CN102913345A (en) * | 2012-09-27 | 2013-02-06 | 三一重工股份有限公司 | EGR (exhaust gas recirculation) gas temperature control device, EGR gas temperature control method, engine and engineering machinery |
| CN105223023A (en) * | 2015-09-29 | 2016-01-06 | 安徽江淮汽车股份有限公司 | The detection method of a kind of EGR gas temperature and cooler for recycled exhaust gas cooling effectiveness |
| CN106321296A (en) * | 2016-08-31 | 2017-01-11 | 潍柴动力股份有限公司 | Method and device for adjusting EGR exhaust gas temperature |
| CN106677933A (en) * | 2016-12-27 | 2017-05-17 | 重庆长安汽车股份有限公司 | Water end-controllable EGR cooling system |
| CN206638420U (en) * | 2017-04-12 | 2017-11-14 | 辽宁工业大学 | A kind of cooler for recycled exhaust gas experimental rig |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112380707A (en) * | 2020-11-18 | 2021-02-19 | 潍柴动力股份有限公司 | Method and device for evaluating cooling performance of EGR cooler and electronic equipment |
| CN114562396A (en) * | 2022-03-28 | 2022-05-31 | 江铃汽车股份有限公司 | Method for verifying reliability of low-temperature working condition of EGR (exhaust gas Recirculation) system |
| CN115217681A (en) * | 2022-07-29 | 2022-10-21 | 潍柴动力股份有限公司 | Control method of EGR system, vehicle and storage medium |
| CN115217681B (en) * | 2022-07-29 | 2024-05-17 | 潍柴动力股份有限公司 | Control method of EGR system, vehicle and storage medium |
| CN115929518A (en) * | 2022-11-04 | 2023-04-07 | 东风商用车有限公司 | EGR Cooler Fault Early Warning Method |
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