CN113250870A - Method for detecting clogging in a fuel filter of a vehicle - Google Patents
Method for detecting clogging in a fuel filter of a vehicle Download PDFInfo
- Publication number
- CN113250870A CN113250870A CN202110182049.3A CN202110182049A CN113250870A CN 113250870 A CN113250870 A CN 113250870A CN 202110182049 A CN202110182049 A CN 202110182049A CN 113250870 A CN113250870 A CN 113250870A
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- China
- Prior art keywords
- vehicle
- clogging
- ecu
- fuel filter
- value
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- Pending
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000000007 visual effect Effects 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 abstract description 5
- 239000011159 matrix material Substances 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 abstract 1
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D33/00—Controlling delivery of fuel or combustion-air, not otherwise provided for
- F02D33/003—Controlling the feeding of liquid fuel from storage containers to carburettors or fuel-injection apparatus ; Failure or leakage prevention; Diagnosis or detection of failure; Arrangement of sensors in the fuel system; Electric wiring; Electrostatic discharge
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
- B01D35/143—Filter condition indicators
- B01D35/1435—Filter condition indicators with alarm means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D37/00—Processes of filtration
- B01D37/04—Controlling the filtration
- B01D37/046—Controlling the filtration by pressure measuring
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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
- 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
- F02M37/40—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 with means for detection of clogging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0602—Fuel pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/3082—Control of electrical fuel pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
- F02D41/3836—Controlling the fuel pressure
- F02D41/3845—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped
- F02D41/3854—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped with elements in the low pressure part, e.g. low pressure pump
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention relates to a method of detecting clogging in a fuel filter of a vehicle. The present disclosure presents a method of detecting a degree of filter clogging in an internal combustion engine using an electronic control unit (ECU (105)). In step 201, the ECU (105) receives measurements of a set of parameters. In step 202, the ECU (105) stores a matrix including correlation coefficients between each parameter in the set of parameters and the value of the differential pressure. In step 203, the ECU (105) calculates a predicted value of the differential pressure based on the measured values of the set of parameters and the matrix. In step 204, the ECU (105) linearizes the predicted value of the differential pressure using the dynamic value of the actual differential pressure. The dynamic value of the actual differential pressure is derived from a self-learning algorithm that uses the actual values of the differential pressure measured in each case. In step 205, the ECU (105) indicates a value of the degree of filter clogging to the vehicle user.
Description
Technical Field
The present disclosure relates to a method of detecting filter plugging in a vehicle.
Background
Filtered fuel is a major requirement for the functionality and durability of fuel injection equipment. Defective filtering leads to failure of the injection equipment, which further affects engine performance. Since the suspended particles are trapped as they pass through the porous media, the filter becomes clogged by some time. This trapping gradually impedes and eventually stops the flow of fuel. Conventional methods of detecting filter plugging in an internal combustion engine use sensors inside the internal combustion engine to measure differential pressure across the filter. There is a need for an alternative method that is inexpensive and robust.
Indian patent application 201941043084 "a method of detecting filter clogging in a vehicle" discloses a method of detecting filter clogging in an internal combustion engine in use. Here, an Electronic Control Unit (ECU) receives measured values of a set of parameters and stores a matrix including correlation coefficients between each parameter of the set of parameters and a value of differential pressure. The ECU calculates a predicted value of the differential pressure based on the measured values of the set of parameters and the matrix. The predicted value of the pressure difference is then linearized with the dynamic value of the actual pressure difference. The dynamic value of the actual differential pressure is derived from a self-learning algorithm that uses the actual values of the differential pressure measured in each case.
Disclosure of Invention
The invention provides a method of detecting clogging in a fuel filter of a vehicle further comprising an electric supply pump, a high pressure fuel pump, a common rail and at least one electronic control unit, the steps of the method comprising: calculating a value of electric power consumed by the electric supply pump; measuring rail pressure deviation in the common rail; the method is characterized in that: calculating a value of hydraulic power based on a rail pressure deviation and a flow rate demand of the high pressure fuel pump; calculating a ratio between the electric power consumed by the electric charge pump and the hydraulic power; indicating the clogging of the fuel filter by a user of the vehicle based on the measured ratio.
Drawings
Embodiments of the invention are described with reference to the accompanying drawings:
fig. 1 depicts hydraulic components of a common rail system for a vehicle.
FIG. 2 is a flow chart of a method of detecting a fuel filter plugging in a vehicle.
Detailed Description
Fig. 1 depicts hydraulic components of a common rail (104) system for a vehicle. The vehicle includes an electric supply pump (101), a fuel filter (102), a high-pressure fuel pump (103), a common rail (104), and at least one electronic control unit (ECU (105)). An electric feed pump (101) draws fuel from a fuel tank and supplies it to a fuel filter (102). The fuel filter (102) filters out dust, particulate matter, and water from the fuel screen. The high-pressure fuel pump (103) is responsible for compressing the fuel supplied by the electric feed pump (101) and the fuel filter (102) to a pressure required for high-pressure injection. High-pressure fuel is supplied to a common rail (104). The common rail (104) is a shared high pressure reservoir that stores and supplies fuel to the injectors or cylinders of the vehicle.
Fig. 2 is a flow chart of a method of detecting clogging of a fuel filter (102) in a vehicle using an electronic control unit (ECU (105)) adapted to detect clogging of the fuel filter (102). In step (201), an ECU (105) calculates a value of electric power consumed by an electric supply pump (101) of a vehicle. In step (202), an ECU (105) measures a rail pressure deviation in a common rail (104) of a vehicle. In step (203), the ECU (105) calculates a value of hydraulic power based on the rail pressure deviation and the flow rate demand of the high pressure fuel pump (103).
The flow rate requirement of the high-pressure fuel pump (103) is a predefined value calculated under steady-state conditions of the high-pressure fuel pump (103). In step (204), the ECU (105) calculates a ratio between electric power and hydraulic power consumed by the electric supply pump (101). In step (205), the ECU (105) indicates clogging of a user fuel filter (102) of the vehicle based on the measured ratio. Clogging of the fuel filter (102) is indicated to a user of the vehicle by acoustic and visual means.
Calculation of the value of the electric power (201) consumed by the electric supply pump (101) based on instantaneous current and voltage readings of the electric supply pump (101). The current and voltage readings are recorded by the ECU (105) at regular intervals using one of a number of sensors known to those skilled in the art. The principle behind calculating the power consumed by the electric charge pump (101) is to tell us the back pressure felt due to clogging of the fuel filter (102). When the fuel filter (102) is clogged, the back pressure generated by the clogging affects the efficiency of the electric feed pump (101). In order to supply the same amount of fuel, it will consume more power. Therefore, the power consumed by the electric supply pump (101) is proportional to the degree of clogging in the fuel filter (102).
In step (202), the pressure deviation in the common rail (104) is measured by the ECU (105) by means of one or more sensors installed in the system. In an embodiment, a pressure deviation in the common rail (104) is measured by means of a Rail Pressure Sensor (RPS). The calculation (203) of the value of the hydraulic power is based on the rail pressure deviation and the flow rate requirement of the high pressure fuel pump (103).
The flow rate requirement is a predefined value unique to each pump. In an embodiment, the flow rate value of the high pressure fuel pump (103) is obtained at steady state based on feedback control provided by Proportional Integral Derivative (PID) control logic. The PID control logic is run by the ECU (105). The PID control logic is a control loop mechanism that employs feedback. The PID control logic calculates the error between the desired set point and the measured process variable and makes corrections based on proportional, integral and derivative terms (P, I and D, respectively). In the present invention, the desired set point represents a desired rail pressure to be maintained in the common rail system. The integral part of the PID control logic is considered to be the flow rate of the high pressure fuel pump (103). The integral part is multiplied by the pressure deviation measured in the common rail (104) to obtain a value of the hydraulic power.
In step (204), the ECU (105) calculates a ratio between electric power and hydraulic power consumed by the electric supply pump (101). The ratio between the power consumed by the electric supply pump (101) and the hydraulic power indicates a blockage of the fuel filter (102). This ratio indicates the fact that the electric feed pump (101) is consuming more power in order to meet the same amount of fuel demand of the fuel injection components. The threshold value of the ratio is determined after testing and testing for a specific set of the electric feed pump (101), the filter and the high pressure fuel pump (103). If the ratio exceeds the threshold, it means that the fuel filter (102) is clogged and needs to be replaced. In step (205), this indication is given to the user of the vehicle using audio or visual means. In an embodiment, the dashboard of the vehicle has visual means for indicating clogging of the fuel filter (102), such as a light emitting diode or an icon on the dashboard. In another embodiment, the dashboard of the vehicle has an audible means, such as an alarm, for indicating to a user of the vehicle that the fuel filter (102) is clogged.
The idea is to develop a method for detecting clogging in a fuel filter (102) based on analysis and prediction of electrical and hydraulic power to indicate the health and efficiency of the filter. This is an accurate and more accurate method of determining filter clogging, as it takes into account the back pressure due to filter clogging which affects the power consumed by the electric feed pump (101) of the fuel filter (102). But also it allows for slight pressure deviations in the common rail (104) that change the hydraulic power. This method does not require the installation of a special filter clogging sensor inside the internal combustion engine, thus providing an economical, efficient and more accurate solution to the problem of checking the degree of filter clogging.
It must be understood that the embodiments explained in the above detailed description are illustrative only and do not limit the scope of the invention. Any modification to the method of detecting a blockage of a fuel filter (102) in a vehicle is contemplated and forms part of the present invention. The scope of the invention is limited only by the claims.
Claims (6)
1. A method of detecting clogging in a fuel filter (102) of a vehicle, the vehicle further comprising an electric supply pump (101), a high pressure fuel pump (103), a common rail (104) and at least one electronic control unit (ECU (105)), the steps of the method comprising: calculating a value of electric power consumed by the electric supply pump (101); measuring a rail pressure deviation in the common rail (104); the method is characterized in that:
calculating a value of hydraulic power based on a rail pressure deviation and a flow rate demand of the high pressure fuel pump (103);
calculating a ratio between the electric power consumed by the electric charge pump (101) and the hydraulic power;
indicating the clogging of the fuel filter (102) by a user of the vehicle based on the measured ratio.
2. The method of detecting clogging in a fuel filter (102) of a vehicle of claim 1, wherein the flow rate requirement of the high pressure fuel pump (103) is a predefined value calculated for a steady state condition of the high pressure fuel pump (103).
3. The method of detecting clogging in a fuel filter (102) of a vehicle of claim 1, wherein indicating the clogging of the fuel filter (102) by a user of the vehicle is done by acoustic and visual means.
4. An electronic control unit (ECU (105)) adapted to detect clogging in a fuel filter (102) of a vehicle, the ECU (105) being configured to:
calculating a value of electric power consumed by an electric supply pump (101) of the vehicle;
measuring a rail pressure deviation in a common rail (104) of the vehicle;
calculating a value of hydraulic power based on a rail pressure deviation and a flow rate demand of the high pressure fuel pump (103);
calculating a ratio between the electric power consumed by the electric charge pump (101) and the hydraulic power;
indicating the clogging of the fuel filter (102) by a user of the vehicle based on the measured ratio.
5. An electronic control unit (ECU (105)) adapted to detect clogging in a fuel filter (102) of a vehicle according to claim 4, wherein the flow rate requirement of the high pressure fuel pump (103) is a predefined value calculated for a steady state condition of the high pressure fuel pump (103).
6. An electronic control unit (ECU (105)) adapted to detect clogging in a fuel filter (102) of a vehicle according to claim 5, wherein indicating the clogging of the fuel filter (102) by a user of the vehicle is done by acoustic and visual means.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IN202041006256 | 2020-02-13 | ||
| IN202041006256 | 2020-02-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113250870A true CN113250870A (en) | 2021-08-13 |
Family
ID=77060902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110182049.3A Pending CN113250870A (en) | 2020-02-13 | 2021-02-10 | Method for detecting clogging in a fuel filter of a vehicle |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113250870A (en) |
| DE (1) | DE102021201265A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115789244A (en) * | 2022-11-30 | 2023-03-14 | 重庆长安汽车股份有限公司 | Filter service life online monitoring method and monitoring system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11701605B1 (en) | 2022-04-29 | 2023-07-18 | International Engine Intellectual Property Company, Llc | Motor load based fluid filter service interval |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006004296A1 (en) * | 2006-01-31 | 2007-08-02 | Daimlerchrysler Ag | Detecting faults in vehicle fuel pump with filter, compares electrical power input with hydraulic pumping performance and identifies departures outside given thresholds |
| EP2042222A1 (en) * | 2007-09-27 | 2009-04-01 | Renault S.A.S. | Device and method for detecting the clogging of a fuel filter of an internal combustion engine fuel supply system |
| CN103857914A (en) * | 2011-05-20 | 2014-06-11 | 英国石油勘探运作有限公司 | Pump |
| CN109844291A (en) * | 2016-10-19 | 2019-06-04 | 康明斯过滤Ip公司 | The estimation of liquid filter fuel consumption |
| CN109870965A (en) * | 2017-12-04 | 2019-06-11 | 通用汽车环球科技运作有限责任公司 | Method and apparatus for monitoring car carrying object subsystem |
-
2021
- 2021-02-10 CN CN202110182049.3A patent/CN113250870A/en active Pending
- 2021-02-10 DE DE102021201265.5A patent/DE102021201265A1/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006004296A1 (en) * | 2006-01-31 | 2007-08-02 | Daimlerchrysler Ag | Detecting faults in vehicle fuel pump with filter, compares electrical power input with hydraulic pumping performance and identifies departures outside given thresholds |
| EP2042222A1 (en) * | 2007-09-27 | 2009-04-01 | Renault S.A.S. | Device and method for detecting the clogging of a fuel filter of an internal combustion engine fuel supply system |
| CN103857914A (en) * | 2011-05-20 | 2014-06-11 | 英国石油勘探运作有限公司 | Pump |
| CN109844291A (en) * | 2016-10-19 | 2019-06-04 | 康明斯过滤Ip公司 | The estimation of liquid filter fuel consumption |
| CN109870965A (en) * | 2017-12-04 | 2019-06-11 | 通用汽车环球科技运作有限责任公司 | Method and apparatus for monitoring car carrying object subsystem |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115789244A (en) * | 2022-11-30 | 2023-03-14 | 重庆长安汽车股份有限公司 | Filter service life online monitoring method and monitoring system |
| CN115789244B (en) * | 2022-11-30 | 2024-09-06 | 重庆长安汽车股份有限公司 | Filter service life online monitoring method and monitoring system |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102021201265A1 (en) | 2021-08-19 |
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