CN111219248A - Method of detecting the presence of a filter in a system - Google Patents
Method of detecting the presence of a filter in a system Download PDFInfo
- Publication number
- CN111219248A CN111219248A CN201911175209.0A CN201911175209A CN111219248A CN 111219248 A CN111219248 A CN 111219248A CN 201911175209 A CN201911175209 A CN 201911175209A CN 111219248 A CN111219248 A CN 111219248A
- Authority
- CN
- China
- Prior art keywords
- filter
- control unit
- pump
- fluid
- pressure value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000012530 fluid Substances 0.000 claims abstract description 21
- 230000001419 dependent effect Effects 0.000 claims abstract description 3
- 238000005086 pumping Methods 0.000 claims abstract description 3
- 239000000446 fuel Substances 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 239000012535 impurity Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000013016 damping Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/08—Safety, indicating, or supervising devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
- F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus
-
- 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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
- F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
- F02M37/44—Filters structurally associated with pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/14—Arrangements for the supply of substances, e.g. conduits
- F01N2610/1426—Filtration means
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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
- Y02T10/40—Engine management systems
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The present invention relates to a method of detecting the presence of a filter in a system. Disclosed herein is a method of detecting the presence of a filter in a system that includes at least a pump for pumping a fluid. The method comprises receiving (100), by the control unit, a feedback signal from the pump. The feedback signal is then converted (102) to a pressure value. The control unit compares (104) the converted pressure value with a data map containing stored pump pressure values dependent on the air gap in the filter. The control unit checks (106) whether the converted pressure value indicates the presence of a filter based on the data map.
Description
Technical Field
The present invention relates to the field of filters used in systems for filtration.
Background
The filter is used to filter particles or impurities present in the fluid. In the case of a fuel injection system, the fluid may be fuel, and in the case of a dosing system, the fluid may be a dosing liquid. The dosing system is used for emission control. In the case of a dosing system, the pump is located upstream of the filter. The dosing liquid from the pump flows through the filter and into the dosing injector where it is injected into the exhaust stream. If no filter is present in the dosing system, impurities may pass through the dosing system and into the exhaust, causing damage to components of the dosing system.
Drawings
Various modes of the invention are disclosed in detail in the specification and illustrated in the accompanying drawings:
fig. 1 illustrates a method of detecting the presence of a filter in a dosing system.
Detailed Description
FIG. 1 illustrates a method of detecting the presence of a filter in a system. The system includes at least a pump for pumping the fluid. The method comprises receiving 100 a feedback signal from the pump by the control unit, the feedback being receivable from a sensor. The feedback signal is then converted 102 into a pressure value. The control unit compares 104 the converted pressure value with a data map containing stored pump pressure values dependent on the air gap generated in the filter. The air gap of the filter is selected as a parameter because the filter is designed to contain air. The fluid needs to occupy this air gap and then begin to fill this volume in the filter. This requires fluid to flow from the pump at a pressure sufficient to overcome the air gap. In the absence of a filter, no fluid is required to fill the air gap requirement, and fluid can flow directly to the dosing module for injection, or to a high-pressure fuel injection pump if the filter is used in a fuel injection system. This pressure difference of the fluid is used as an input to determine the presence or absence of a filter. The nature of air is compressible, and when there is an air gap due to the filter, the air acts as a damper to the flow of fluid. This can lead to pressure fluctuations as the fluid must fill the volume in the filter against the compressible nature of the air. The control unit checks whether the converted pressure value indicates the presence of a filter based on the data map. The feedback signal from the pump is at least one of a pressure signal and a time signal of the dosing fluid. The pressure fluctuations are more pronounced when the system is without a filter than when the system is with a filter, because the air gap in the filter acts as a damper, which serves to absorb or limit the pressure fluctuations. However, in the absence of a filter, the air surrounding the filter is quickly filled with fluid, and damping performance is lost very quickly as the air is compressed or dissipated.
The disclosed method utilizes the variation in pressure of the fluid flowing through the dosing system with or without the presence of a filter. During calibration in a dosing system, fluid is caused to flow from the pump. The parameter measured during calibration is the pressure at which the fluid flows through the system with and without the filter present. The pressure is then recorded in the form of a data map and stored in the control unit. In systems with and without a filter, the variation in pressure fluctuations is taken as a reference to determine the presence of a filter.
For purposes of better understanding, the working of the method will be explained with reference to a dose delivery system. The method may be used in any system where the absence of a filter may cause damage to components of the system (such as, for example, but not limited to, fuel injection systems, dosing systems). For purposes of better understanding, the method will be explained in consideration of two scenarios: there is a filter in the system and no filter in the system.
If a filter is present in the system, the control unit receives 100 a feedback signal from the pump. The control unit then converts 102 the feedback signal into a pressure value. The converted pressure values are then compared to pressure values stored in the data map for the corresponding flow rate. If the converted value is equal to the pressure value as obtained from the data map for the corresponding flow rate, it indicates that the fluid is overcoming the pressure due to the presence of air gaps in the filter to flow through the dosing system, or in other words that air is acting as a damper. This indicates the presence of a filter in the dosing system.
If no filter is present in the system, the control unit receives 100 a feedback signal from the pump. The control unit then converts 102 the feedback signal into a pressure value. The converted pressure values are then compared to pressure values stored in the data map for the corresponding flow rates. If the converted value is different from the pressure value as obtained from the data map for the corresponding flow rate, it indicates that the fluid does not need to overcome the presence of an air gap because the filter is not present. This indicates that no filter is present in the system. By using the above method, it is now possible to predict the presence and/or absence of a filter in a system utilizing a filter. The absence of a filter in the detection system serves as a precaution to perform a corrective action in order to prevent damage to components of the dosing system.
In the context of the present disclosure, "adapted to" or "arranged" refers to the technical ability or skill of a component, in relation to which the term "adapted to" or "arranged" is used to implement or perform one or more specific actions, depending on the requirements of the specific action or actions to be implemented or performed. Furthermore, the terms "adapted to" or "arranged" are used herein with respect to the normal technical ability or technical skill of a component imparted by the design or structure or composition of the component, and are not related to being beyond the rightOften timesTechnical ability or any specific or unrelated ability or art within the scope of technical art. Therefore, there is a need to solve this problem.
It should be understood that the embodiments explained in the above description are merely illustrative, and do not limit the scope of the present invention in terms of the type of filter used or the type of system in which the filter is used. Many other modifications and variations of such embodiments and those explained in the specification are envisaged. The scope of the invention is limited only by the scope of the claims.
Claims (2)
1. A method of detecting the presence of a filter in a system comprising at least a pump for pumping fluid, the method comprising:
receiving (100), by a control unit, a feedback signal from the pump;
-converting (102), by the control unit, the feedback signal into a pressure value;
comparing (104), by the control unit, the converted pressure value with a data map in the control unit containing stored pressure values dependent on air gaps in the filter; and
checking (106), by the control unit, whether the converted pressure value indicates the presence of a filter based on the data map.
2. The method of claim 1, wherein the feedback signal from the pump is at least one of a discharge amount of fluid and a time signal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IN201841044606 | 2018-11-27 | ||
| IN201841044606 | 2018-11-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111219248A true CN111219248A (en) | 2020-06-02 |
Family
ID=70806081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911175209.0A Pending CN111219248A (en) | 2018-11-27 | 2019-11-26 | Method of detecting the presence of a filter in a system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111219248A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2864145A1 (en) * | 2003-12-19 | 2005-06-24 | Renault Sas | Exhaust gas treatment system e.g. particle filter, presence determining method for motor vehicle, involves determining absence of exhaust gas treatment system if measured time period is less than threshold time period |
| FR2958971A1 (en) * | 2010-04-14 | 2011-10-21 | Peugeot Citroen Automobiles Sa | Method for diagnosis absence of particle filter in exhaust line of e.g. diesel engine of vehicle, involves comparing evolutions of oxygen rates at level of inlet and outlet of particle filter if particle filter is determined to be absent |
| WO2015040300A1 (en) * | 2013-09-23 | 2015-03-26 | Peugeot Citroen Automobiles Sa | Method for diagnosing the absence of a particle filter |
| FR3019212A1 (en) * | 2014-03-28 | 2015-10-02 | Peugeot Citroen Automobiles Sa | MOTOR VEHICLE COMBUSTION ENGINE WITH PARTICLE FILTER ABSENCE DETECTION |
| CN106662083A (en) * | 2014-05-28 | 2017-05-10 | 恩特格里斯公司 | System and method for operation of a pump with feed and dispense sensors, filtration and dispense confirmation, and reduced pressure priming of filter |
| FR3053729A1 (en) * | 2016-07-05 | 2018-01-12 | Peugeot Citroen Automobiles Sa | METHOD FOR DETECTING THE PRESENCE OF A PARTICLE FILTER OF AN INTERNAL COMBUSTION ENGINE |
| DE102016212636A1 (en) * | 2016-07-12 | 2018-01-18 | Bayerische Motoren Werke Aktiengesellschaft | Detecting the presence of a particulate filter |
-
2019
- 2019-11-26 CN CN201911175209.0A patent/CN111219248A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2864145A1 (en) * | 2003-12-19 | 2005-06-24 | Renault Sas | Exhaust gas treatment system e.g. particle filter, presence determining method for motor vehicle, involves determining absence of exhaust gas treatment system if measured time period is less than threshold time period |
| FR2958971A1 (en) * | 2010-04-14 | 2011-10-21 | Peugeot Citroen Automobiles Sa | Method for diagnosis absence of particle filter in exhaust line of e.g. diesel engine of vehicle, involves comparing evolutions of oxygen rates at level of inlet and outlet of particle filter if particle filter is determined to be absent |
| WO2015040300A1 (en) * | 2013-09-23 | 2015-03-26 | Peugeot Citroen Automobiles Sa | Method for diagnosing the absence of a particle filter |
| FR3019212A1 (en) * | 2014-03-28 | 2015-10-02 | Peugeot Citroen Automobiles Sa | MOTOR VEHICLE COMBUSTION ENGINE WITH PARTICLE FILTER ABSENCE DETECTION |
| CN106662083A (en) * | 2014-05-28 | 2017-05-10 | 恩特格里斯公司 | System and method for operation of a pump with feed and dispense sensors, filtration and dispense confirmation, and reduced pressure priming of filter |
| FR3053729A1 (en) * | 2016-07-05 | 2018-01-12 | Peugeot Citroen Automobiles Sa | METHOD FOR DETECTING THE PRESENCE OF A PARTICLE FILTER OF AN INTERNAL COMBUSTION ENGINE |
| DE102016212636A1 (en) * | 2016-07-12 | 2018-01-18 | Bayerische Motoren Werke Aktiengesellschaft | Detecting the presence of a particulate filter |
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