CN107542555A - Vehicle exhaust recirculating system opens ice mode control method - Google Patents
Vehicle exhaust recirculating system opens ice mode control method Download PDFInfo
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- CN107542555A CN107542555A CN201610482004.7A CN201610482004A CN107542555A CN 107542555 A CN107542555 A CN 107542555A CN 201610482004 A CN201610482004 A CN 201610482004A CN 107542555 A CN107542555 A CN 107542555A
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- opens ice
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
Opened ice mode control method the present invention relates to a kind of vehicle exhaust recirculating system, it comprises the following steps：A. vehicle launch and engine operation；B. ECT is detected, if ECT is higher than setting value, into step C1；If ECT is less than setting value, into step C2；C1. Engine Inlet Temperature is detected, if Engine Inlet Temperature is higher than setting, into conventional EGR mode judgment step D1；C2. Engine Inlet Temperature is detected, if Engine Inlet Temperature is higher than setting, into conventional EGR mode judgment step D1；If Engine Inlet Temperature enters the mode decision step D2 that opens ice less than setting.Done repeatedly by using the present invention pattern that can avoid opening ice during the vehicle frequent starting under low temperature mode, so as to avoid the icing of EGR line and blocking, while reduce the energy consumption of vehicle and improve the life-span of EGR line.
Description
Technical field
The present invention relates to field of vehicle control, and more specifically, it is related to a kind of control method for the pattern that opened ice for vehicle exhaust recirculating system, it is suitable for using on the vehicle of gas recirculation system is equipped with, and is particularly suitable for using at low ambient temperatures.
Background technology
In the prior art, increasing vehicle starts to be equipped with waste gas recycling (Exhaust Gas Recycle, it is abbreviated as EGR) system, so as to when necessary be re-introduced into the portion in being vented from vehicle motor in engine aspirating system by EGR valve, and the portion is caused to enter cylinder to participate in the burning of mixed gas.By setting EGR shampoo pastes, oil consumption is not only reduced, but also the discharge of nitrogen oxides can be reduced, so as to reduce the level of pollution of vehicle discharge.
Set up on vehicle and be equipped with ECM (Engine Control Module, that is engine/engine control module), and whether ECM is configured to need to be needed to carry out waste gas recycling, and the exhausted air quantity of recycling under certain operating mode according to the condition such as the rotating speed of engine, load, intake air temperature, charge flow rate, coolant temperature, delivery temperature comprehensive descision.If the waste gas for participating in recycling is excessive, the combustibility of gaseous mixture will be influenceed, so as to influence the dynamic property of engine.Particularly when engine is under the operating mode of the Smaller loads such as idling, low speed and cold, the waste gas of recycling can significantly influence engine performance.So when engine works at low ambient temperatures, ECM control waste gas is not involved in recycling, and avoids engine performance from being affected.When engine charge and coolant temperature reach certain temperature, and exceed certain rotating speed, load, ECM controls a part of waste gas to participate in recycling.
In low temperature environment, driver is carrying out short distance traveling often such that the inabundant warming-up of vehicle just has arrived at destination and switch-off.In the case, gas recirculation system will not do or be diagnosed, and can produce pipeline freeze, it is freezing or can not diagnose valve damage the problems such as.Therefore, in existing control system, (key is circulated in each key
Cycle in), when detecting coolant temperature and engine speed and in the case that load meets condition, the pattern of opening ice can be done once.When doing, EGR is opened, and allows the high-temperature gas from gas extraction system to heat EGR valve body and pipeline etc., and EGR valve body can also carry out the opening and closing action of machinery simultaneously, thus play a part of preventing freezing and open ice.
However, part driver can frequent hot exposure vehicle, cause the pattern of opening ice frequently to trigger.The high-temp waste gas of big humidity brings substantial amounts of water vapour into inlet manifold, and due to a variety of causes, water vapour, which is not consumed, to be condensed and freeze in manifold wall on the contrary, causes brake vacuum blockage.In addition, the frequent starting for the pattern that opens ice also creates the waste of energy and the abrasion of exhaust gas recycling system, so as to improve the energy consumption of vehicle and reduce the life-span of EGR line.
Opened ice mode control method it is therefore desired to design a kind of vehicle exhaust recirculating system, it can solve the problem that problem as described above, prevent improper vehicle restart may caused by ponding freeze.
The content of the invention
Opened ice mode control method it is an object of the present invention to provide a kind of vehicle exhaust recirculating system, it has relative to the improved control logic of prior art control method.
The purpose of the present invention is achieved by the following technical solution：
A kind of vehicle exhaust recirculating system opens ice mode control method, and it comprises the following steps：
A. vehicle launch and engine operation；
B. ECT is detected, if ECT is higher than setting value, into step C1；If ECT is less than setting value, into step C2；
C1. Engine Inlet Temperature is detected, if Engine Inlet Temperature is higher than setting, into conventional EGR mode judgment step D1；
C2. Engine Inlet Temperature is detected, if Engine Inlet Temperature is higher than setting, into conventional EGR mode judgment step D1；If Engine Inlet Temperature enters the mode decision step D2 that opens ice less than setting.
Alternatively, conventional EGR mode judgment step D1 includes：
D11. ECT is detected；If ECT exceedes setting, into step D12；
D12. judge whether engine speed and load meet to require；If engine speed and load meet to require, into step D13；
D13. conventional EGR mode is entered.
Alternatively, the mode decision step that opens ice D2 includes：
D21. ECT is detected；If ECT exceedes setting, into step D22；
D22. judge whether engine speed and load meet to require；If engine speed and load meet to require, into step D23；
D23. the pattern that opens ice is entered.
Alternatively, in step D21, when ECT is more than 50-60 DEG C, into step D22.
Alternatively, in step D23, judge whether the pattern of opening ice is completed by timing；If do not completed, the pattern of opening ice continues to run with；If completed, the pattern of opening ice terminates.
Alternatively, the pattern that opens ice also includes：EGR valve body and pipeline etc. are heated using the high-temperature gas of gas extraction system, and the valve body of EGR valve is carried out the opening and closing action of machinery.
Alternatively, the timing for the pattern that opens ice is carried out by timing module.
Alternatively, the above-mentioned vehicle exhaust recirculating system mode control method that opens ice is configured to be performed by the ECM of vehicle.
The beneficial effects of the present invention are：The vehicle exhaust recirculating system mode control method that opens ice of the present invention has many advantages, such as simple and convenient, reasonable in design, reliable.By using control system and method for the present invention, the pattern that can avoid opening ice during the vehicle frequent starting under low temperature mode is done repeatedly, so as to avoid the icing of EGR line and blocking, while is reduced the energy consumption of vehicle and is improved the life-span of EGR line.
Brief description of the drawings
The present invention is explained in further detail for connection with figures and preferred embodiment below.
Fig. 1 is that vehicle exhaust recirculating system of the prior art opens ice the flow chart of mode control method.
Fig. 2 is that the vehicle exhaust recirculating system of one embodiment of the present of invention opens ice the flow chart of mode control method.
Fig. 3 is the detailed view of embodiment shown in Fig. 2, with the numbering to each step.
Embodiment
The preferred embodiments of the present invention are described in detail below with reference to accompanying drawing.Skilled artisans will appreciate that these descriptions are only descriptive, exemplary, and protection scope of the present invention is should not be interpreted as limiting.
First, it should be noted that, the top that is previously mentioned herein, bottom, upward, towards inferior orientation term defined relative to the direction in each accompanying drawing, they are relative concepts, and therefore can be changed according to the diverse location at it and different practical states.So these or other orientation term should not be interpreted as restricted term.
In addition, it is also important to note that, for described in the embodiments herein or implicit any single technical characteristic, or any single technical characteristic for being shown in the drawings or implying, it still is able to continue to combine between these technical characteristics (or its equivalent), so as to obtain the other embodiment of the invention not referred to directly herein.
Fig. 1 is that vehicle exhaust recirculating system of the prior art opens ice the flow chart of mode control method.Wherein, in the state of engine operation/vehicle launch, whether the intake air temperature that engine is preferably detected with ECM exceedes setting value.Judge if it does, then entering conventional EGR mode, that is, whether the temperature for continuing to detect water/coolant of cooling exceedes setting value, and whether engine speed and load meet to require.If all "Yes" of result of determination in foregoing judgment step, into conventional EGR mode.Because conventional EGR mode is known for a person skilled in the art, therefore no longer its detailed process and realization are repeated herein.
If detect that the intake air temperature of engine not less than setting value, enters the mode decision that opens ice, that is, whether the temperature for continuing to detect water/coolant of cooling exceedes setting value, and whether engine speed and load meet to require.If all "Yes" of result of determination in foregoing judgment step, enter the pattern that opens ice.Timer or timing means are preferably set up to record doing the time for the pattern of opening ice, and do the time exceed setting value when exit the pattern of opening ice and terminate whole control method.
Above-mentioned control method has been widely used for actual vehicle, and the pattern that opens ice achieves preferable effect in practice.
However, being found by investigation, in actual motion especially in frequently short distance traveling, part driver understands frequent starting vehicle.And opened ice mode control method according to above-mentioned vehicle exhaust recirculating system, all can be according to Fig. 1 when starting vehicle every time the step of is detected.When vehicle is in low temperature environment, frequently short distance traveling often results in Engine Inlet Temperature and be less than setting value for a long time so that starting every time after vehicle all can be into opening ice pattern.And include substantial amounts of water vapour in vehicle exhaust now, therefore into the pattern of opening ice substantial amounts of water vapour can be made to be brought into inlet manifold repeatedly, cause inlet manifold inwall to freeze or even block.
Technical scheme is intended to solve the problems, such as the pattern frequent starting that opens ice, and its particular content is described in detail below.
Fig. 2 is that the vehicle exhaust recirculating system of one embodiment of the present of invention opens ice the flow chart of mode control method.Wherein, the step of whether temperature of engine cooling water exceedes setting when detection startup is added before the step of whether Engine Inlet Temperature exceedes setting is detected.If detecting that the temperature of engine cooling water during startup exceedes setting value, enter the judgement of conventional EGR controls, that is, judge whether intake air temperature exceedes setting, water temperature whether exceedes setting and engine speed and whether load meets to require.If all "Yes" of result of determination in foregoing judgment step, into conventional EGR mode.
If detecting during startup the temperature of engine cooling water and not less than setting value, continue to judge whether intake air temperature exceedes setting.If intake air temperature exceedes setting, it is thermal starting pattern to show vehicle, and enters the judgement of conventional EGR mode；If intake air temperature and not less than setting value, enter the judgement for the pattern that opens ice, i.e., judge whether water temperature exceedes and set and whether engine speed and load meet to require.If all "Yes" of result of determination in foregoing judgment step, enter the pattern that opens ice.Timer or timing means are preferably set up to record doing the time for the pattern of opening ice, and do the time exceed setting value when exit the pattern of opening ice and terminate whole control method.
In vehicle, engine cooling water temperature is no more than setting and in the case of cold start-up of the Engine Inlet Temperature no more than setting on startup, is possible to enter the pattern that opens ice.Vehicle operation a period of time is waited, in the case that engine cooling water temperature is persistently increased over 50-60 DEG C, and engine speed and load are satisfied by requirement, the temperature of EGR line, which also will raise to, makes water vapour not frozen in EGR line.At this moment it can determine whether that vehicle belongs to cold start-up and engine has warmed up, then the pattern of opening ice can start, and EGR line will not be caused to freeze or block.
When vehicle is again started up in low temperature environment after the power cutoff short time, the temperature of engine cooling water is far above environment temperature.By above-mentioned control method, when engine cooling water temperature exceedes setting value, vehicle is judged for thermal starting, and enters the step of judging conventional EGR mode, without entering the pattern that opens ice.
In vehicle, engine cooling water temperature is no more than setting but in the case of cold start-up of the Engine Inlet Temperature more than setting, also enters the step of judging conventional EGR mode on startup.
Fig. 3 is the detailed view of embodiment shown in Fig. 2, and with the numbering to each step, specifically, the vehicle exhaust recirculating system of the invention mode control method that opens ice comprises the following steps.
A. vehicle launch and engine operation；
B. ECT is detected, if ECT is higher than setting value, into step C1；If ECT is less than setting value, into step C2；
C1. Engine Inlet Temperature is detected, if Engine Inlet Temperature is higher than setting, into conventional EGR mode judgment step D1；
C2. Engine Inlet Temperature is detected, if Engine Inlet Temperature is higher than setting, into conventional EGR mode judgment step D1；If Engine Inlet Temperature enters the mode decision step D2 that opens ice less than setting.
Conventional EGR mode judgment step D1 includes：
D11. ECT is detected；If ECT exceedes setting, into step D12；
D12. judge whether engine speed and load meet to require；If engine speed and load meet to require, into step D13；
D13. conventional EGR mode is entered.
The mode decision step that opens ice D2 includes：
D21. ECT is detected；If ECT exceedes setting, into step D22；
D22. judge whether engine speed and load meet to require；If engine speed and load meet to require, into step D23；
It should be appreciated that vehicle exhaust recirculating system described herein opens ice, mode control method is preferably performed by ECM, and other control modules that can also be expected by those skilled in the art or device perform.The devices such as sensor configured on vehicle can be used to gather for the parameters such as delivery temperature, water temperature/coolant temperature, engine speed, engine load, or can be obtained from other approach known to a person skilled in the art.
ECM is preferably judged by application layer software logic, and controls the opportunity and aperture that magnetic valve is opened by ECM conditions and engine calibration.In the pattern of opening ice, it is preferred to use the high-temperature gas from gas extraction system heats to EGR valve body and pipeline etc., and EGR valve body is carried out the opening and closing action of machinery, thus plays a part of preventing freezing and opens ice.
In addition, the timer or timing means for pattern timing of opening ice are preferably the timing module in ECM.
Those skilled in the art can easily manufacture the vehicle for the mode control method that opened ice comprising vehicle exhaust recirculating system of the invention according to present disclosure, and the vehicle exhaust recirculating system of the present invention is opened ice into mode control method applied on such vehicle.
Compared with conventional vehicles gas recirculation system opens ice mode control method, opened ice mode control method by using the vehicle exhaust recirculating system of the present invention, the pattern that can avoid opening ice during the vehicle frequent starting under low temperature mode is done repeatedly, so as to avoid the icing of EGR line and blocking, while reduce the energy consumption of vehicle and improve the life-span of EGR line.
The present invention is disclosed with reference to the accompanying drawings in this specification, and those skilled in the art is implemented the present invention, including manufactures and using any device or system, the method from suitable material and using any combination.The scope of the present invention is limited by claimed technical scheme, and other examples expected comprising those skilled in the art.As long as other such examples are included not different from the structural detail of claimed technical scheme literal language; or other such examples do not have the equivalent structural elements of essential distinction comprising the literal language with claimed technical scheme, then other such examples are intended to be in determined by claims of the present invention claimed technical scheme in protection domain.
Claims (8)
- The mode control method 1. a kind of vehicle exhaust recirculating system opens ice, it is characterised in that it comprises the following steps：A. vehicle launch and engine operation；B. ECT is detected, if ECT is higher than setting value, into step C1；If ECT is less than setting value, into step C2；C1. Engine Inlet Temperature is detected, if Engine Inlet Temperature is higher than setting, into conventional EGR mode judgment step D1；C2. Engine Inlet Temperature is detected, if Engine Inlet Temperature is higher than setting, into conventional EGR mode judgment step D1；If Engine Inlet Temperature enters the mode decision step D2 that opens ice less than setting.
- The mode control method 2. vehicle exhaust recirculating system according to claim 1 opens ice, it is characterised in that the conventional EGR mode judgment step D1 includes：D11. ECT is detected；If ECT exceedes setting, into step D12；D12. judge whether engine speed and load meet to require；If engine speed and load meet to require, into step D13；AndD13. conventional EGR mode is entered.
- The mode control method 3. vehicle exhaust recirculating system according to claim 1 opens ice, it is characterised in that the mode decision step D2 that opens ice includes：D21. ECT is detected；If ECT exceedes setting, into step D22；D22. judge whether engine speed and load meet to require；If engine speed and load meet to require, into step D23；AndD23. the pattern that opens ice is entered.
- The mode control method 4. vehicle exhaust recirculating system according to claim 3 opens ice, it is characterised in that in step D21, when ECT is more than 50-60 DEG C, into step D22.
- The mode control method 5. vehicle exhaust recirculating system according to claim 3 opens ice, it is characterised in that in step D23, judge whether the pattern of opening ice is completed by timing；If do not completed, the pattern of opening ice continues to run with；If completed, the pattern of opening ice terminates.
- The mode control method 6. vehicle exhaust recirculating system according to claim 5 opens ice, it is characterised in that the pattern that opens ice also includes：EGR valve body and pipeline etc. are heated using the high-temperature gas of gas extraction system, and the valve body of EGR valve is carried out the opening and closing action of machinery.
- The mode control method 7. vehicle exhaust recirculating system according to claim 5 opens ice, it is characterised in that the timing of the pattern that opens ice is carried out by timing module.
- The mode control method 8. vehicle exhaust recirculating system according to any one of the preceding claims opens ice, it is characterised in that the vehicle exhaust recirculating system mode control method that opens ice is configured to be performed by the ECM of vehicle.
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| CN201610482004.7A CN107542555B (en) | 2016-06-28 | 2016-06-28 | Vehicle exhaust recirculating system ice-breaking mode control method |
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Cited By (8)
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| CN111120120A (en) * | 2020-03-31 | 2020-05-08 | 潍柴动力股份有限公司 | EGR system control method and device and ECU |
| CN111425310A (en) * | 2020-03-31 | 2020-07-17 | 广西玉柴机器股份有限公司 | Control method for preventing EGR system from freezing |
| CN111577488A (en) * | 2020-04-17 | 2020-08-25 | 东风商用车有限公司 | Multi-mode EGR control strategy |
| CN112585341A (en) * | 2018-08-23 | 2021-03-30 | 沃尔沃卡车集团 | Method for controlling an internal combustion engine system |
| CN113686588A (en) * | 2021-07-16 | 2021-11-23 | 东风汽车集团股份有限公司 | Test method and device for EGR system in cold environment |
| CN113685278A (en) * | 2021-09-29 | 2021-11-23 | 潍柴动力股份有限公司 | EGR control method and device |
| CN114542269A (en) * | 2022-01-18 | 2022-05-27 | 东风汽车集团股份有限公司 | Intercooler, intercooler control method and related equipment |
| CN115217646A (en) * | 2021-09-27 | 2022-10-21 | 广州汽车集团股份有限公司 | Exhaust gas recirculation valve control method and device and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112585341A (en) * | 2018-08-23 | 2021-03-30 | 沃尔沃卡车集团 | Method for controlling an internal combustion engine system |
| CN112585341B (en) * | 2018-08-23 | 2024-01-05 | 沃尔沃卡车集团 | Method for controlling an internal combustion engine system |
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| CN111120120A (en) * | 2020-03-31 | 2020-05-08 | 潍柴动力股份有限公司 | EGR system control method and device and ECU |
| CN111425310A (en) * | 2020-03-31 | 2020-07-17 | 广西玉柴机器股份有限公司 | Control method for preventing EGR system from freezing |
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| CN113686588A (en) * | 2021-07-16 | 2021-11-23 | 东风汽车集团股份有限公司 | Test method and device for EGR system in cold environment |
| CN115217646A (en) * | 2021-09-27 | 2022-10-21 | 广州汽车集团股份有限公司 | Exhaust gas recirculation valve control method and device and storage medium |
| CN115217646B (en) * | 2021-09-27 | 2024-03-15 | 广州汽车集团股份有限公司 | Exhaust gas recirculation valve control method, device and storage medium |
| CN113685278A (en) * | 2021-09-29 | 2021-11-23 | 潍柴动力股份有限公司 | EGR control method and device |
| CN114542269A (en) * | 2022-01-18 | 2022-05-27 | 东风汽车集团股份有限公司 | Intercooler, intercooler control method and related equipment |
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