CN110410173B - Method for predicting service life of engine oil filter element and system for predicting service life of engine oil filter element - Google Patents
Method for predicting service life of engine oil filter element and system for predicting service life of engine oil filter element Download PDFInfo
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- CN110410173B CN110410173B CN201910902418.4A CN201910902418A CN110410173B CN 110410173 B CN110410173 B CN 110410173B CN 201910902418 A CN201910902418 A CN 201910902418A CN 110410173 B CN110410173 B CN 110410173B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/03—Mounting or connecting of lubricant purifying means relative to the machine or engine; Details of lubricant purifying means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/10—Indicating devices; Other safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M2250/00—Measuring
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention belongs to the technical field of vehicle engines, and particularly relates to a method for predicting the service life of an engine oil filter element and a system for predicting the service life of the engine oil filter element. The method for predicting the service life of the engine oil filter element comprises the following steps: when the engine oil temperature of the engine is determined to reach a preset temperature condition, receiving a pressure difference value on two sides of the filter element and the engine rotating speed obtained through detection; calculating the pressure difference value under the rated rotating speed according to the measured pressure difference value and the rotating speed pressure difference curve; comparing the calculated pressure difference value under the rated rotating speed with a pressure difference service life curve to obtain a service life proportion; if the service life ratio exceeds the set range, the replacement of the filter element is prompted. In the method for predicting the service life of the engine oil filter element, the pressure difference value under the rated rotating speed is calculated; and comparing the calculated pressure difference value under the rated rotating speed with the pressure difference service life curve to obtain the service life proportion. Therefore, the filter element can be timely replaced, damage to the engine is avoided, and waste caused by replacement of the filter element in advance is avoided.
Description
Technical Field
The invention belongs to the technical field of vehicle engines, and particularly relates to a method for predicting the service life of an engine oil filter element and a system for predicting the service life of the engine oil filter element.
Background
The service life of the engine oil filter element is generally maintained regularly at present, and the engine oil filter element is replaced when reaching maintenance mileage or time.
The traditional filter core maintenance mode can not test the resistance of the filter core in real time, generally, the filter core is replaced in advance, and the actual filter core has surplus to cause waste. In addition, the filter element can reach the replacement standard, but cannot be replaced in time.
The existing filter element can not detect the resistance of the filter element and can not determine whether the filter element reaches the replacement standard.
Disclosure of Invention
The invention aims to at least solve the problems that the existing filter element can not detect the resistance of the filter element and can not determine whether the filter element meets the replacement standard or not. The purpose is realized by the following technical scheme:
the invention provides a method for predicting the service life of an engine oil filter element in a first aspect, which comprises the following steps:
when the engine oil temperature of the engine is determined to reach a preset temperature condition, receiving a pressure difference value on two sides of the filter element and the engine rotating speed obtained through detection;
calculating the pressure difference value under the rated rotating speed according to the measured pressure difference value and the rotating speed pressure difference curve;
comparing the calculated pressure difference value under the rated rotating speed with a pressure difference service life curve to obtain a service life proportion;
if the service life ratio exceeds the set range, the replacement of the filter element is prompted.
According to the method for predicting the service life of the engine oil filter element, the pressure difference value under the rated rotating speed is calculated through the measured pressure difference value and the rotating speed differential pressure curve; comparing the calculated pressure difference value under the rated rotating speed with a pressure difference service life curve to obtain a service life proportion; if the service life ratio exceeds the set range, the replacement of the filter element is prompted. Therefore, the filter element can be timely replaced, damage to the engine is avoided, and waste caused by replacement of the filter element in advance is avoided.
In addition, the method for predicting the service life of the engine oil filter element can also have the following additional technical characteristics:
in some embodiments of the invention, the lifetime ratio is displayed if the lifetime ratio does not exceed a set range.
In some embodiments of the invention, the pressure difference value and the engine speed of the two sides of the filter element obtained by detection are received by the ECU controller;
and calculating a pressure difference value under the rated rotating speed through the ECU controller, and comparing the calculated pressure difference value under the rated rotating speed with a pressure difference service life curve to obtain a service life ratio.
In some embodiments of the invention, when the engine oil temperature of the engine reaches 80 ℃, the pressure difference value of the two sides of the filter element and the engine speed are obtained through detection.
In some embodiments of the invention, if the percentage of life exceeds 90%, replacement of the filter cartridge is prompted.
In another aspect of the present invention, a system for predicting engine oil filter element is further provided, wherein the system comprises:
the signal acquisition device comprises a temperature sensor for measuring the temperature of the engine oil and at least two pressure sensors arranged on two sides of the filter element;
the ECU controller judges the service life according to the data measured by the pressure sensor and the temperature sensor;
and the terminal receives the final data judged by the ECU controller.
In some embodiments of the present invention, the ECU controller includes a determination unit that determines whether a temperature value detected by the temperature sensor reaches a preset value, and a processing unit that turns on or off the processing unit.
In some embodiments of the present invention, when the temperature of the engine oil reaches a preset value, the processing unit determines the service life according to a differential pressure of the pressure sensor.
In some embodiments of the invention, the terminal is a display connected to the processing unit, the display being capable of displaying the signal of the processing unit.
In some embodiments of the invention, the signal acquisition device further comprises a rotation speed signal sensor for measuring rotation speed, and the ECU controller is capable of receiving signals of the rotation speed signal sensor.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated by like reference numerals throughout the drawings. In the drawings:
FIG. 1 schematically illustrates a perspective view of an oil filter life prediction system according to an embodiment of the present disclosure;
FIG. 2 schematically illustrates a flow chart of a method of predicting oil filter life, in accordance with an embodiment of the present disclosure;
FIG. 3 schematically illustrates a graph of differential speed pressure in a method of predicting oil filter life according to an embodiment of the present disclosure;
FIG. 4 schematically illustrates a pressure differential life graph in a method of predicting oil filter element life according to an embodiment of the invention.
The reference numerals in the drawings denote the following:
1: a pressure sensor; 2: a temperature sensor; 3: an ECU controller; 4: a rotation speed signal sensor.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
The invention provides an engine oil filter element service life prediction system, which is used for a prediction method for detecting the service life of a filter element.
As shown in fig. 1 to 4, the system for predicting the life of an oil filter element in the present embodiment includes: the device comprises a signal acquisition device, an ECU controller 3 and a terminal, wherein the signal acquisition device comprises a temperature sensor 2 for measuring the temperature of engine oil and at least two pressure sensors 1 arranged at two sides of a filter element; according to the data measured by the pressure sensor 1 and the temperature sensor 2, the ECU controller 3 judges the service life; the terminal receives the final data after the determination by the ECU controller 3.
Can real-time supervision filter core's pressure differential, ECU controller 3 judges whether the filter core reaches life, outputs filter core life-span to the terminal, and the suggestion user changes the filter core. Therefore, the filter element can be timely replaced, damage to the engine is avoided, and waste caused by replacement of the filter element in advance is avoided.
In some embodiments of the present invention, the ECU controller 3 includes a determination unit that determines whether the temperature value detected by the temperature sensor 2 reaches a preset value, and a processing unit that turns on or off the processing unit.
The preset value of the engine oil temperature is 80 ℃. When the temperature of the engine oil is less than 80 ℃, the resistance of the filter element is large, and the resistance is measured normally, so that the measurement result is more accurate.
In some embodiments of the present invention, when the temperature of the engine oil reaches a preset value, the processing unit determines the service life by the pressure difference of the pressure sensor 1.
Specifically, the processing unit determines the pressure difference of the rated rotating speed according to the rotating speed pressure difference curve, the current corresponding service life is judged according to the pressure difference service life curve, and the ratio obtained by comparing the current corresponding service life with the total service life value is final data. As shown in fig. 3, a is a curve of the rotational speed differential pressure of the old filter element close to the scrapped filter element, B is a curve of the rotational speed differential pressure of the new filter element, and C is a curve of the rotational speed differential pressure of the measured filter element.
Assume that the pressure differential is 40Kpa at 600r/min for the old cartridge. The pressure difference of the new filter element is 20Kpa at 600 r/min. The measured differential pressure was 35Kpa at 600r/min for the measured filter element, and the ratio: (35-20)/(40-20) =3/4, assuming that the rated rotation speed is 1000 r/min, the differential pressure of the old filter element is 100Kpa, the differential pressure of the new filter element is 50Kpa, the differential pressure X of the rated rotation speed is (X-50)/(100-50) =3/4, and X is 87.5 Kpa.
The life is determined from fig. 4, for example, the life corresponding to 87.5 Kpa is 6, and the life of the whole filter element is 6.5, so that the ratio is 6/6.5=92%, and the filter element can be replaced at a higher ratio.
The differential pressure of the filter element is measured by two sensors, and the differential pressure is converted into the differential pressure at the rated flow according to the table 1. The pressure difference is compared with the pressure difference of the filter element blockage service life curve shown in the table 2 to obtain the proportion of the service time of the filter element to the service life of the filter element, and the proportion of the residual service life of the filter element to the service life of the filter element can also be calculated.
In some embodiments of the invention, the terminal is a display connected to the processing unit, the display being capable of displaying the signals of the processing unit.
The terminal can also be a mobile phone, a computer and other devices which can display the results of the processing unit.
In some embodiments of the present invention, the signal acquisition device further comprises a rotation speed signal sensor 4 for measuring a rotation speed, and the ECU controller 3 can receive a signal of the rotation speed signal sensor 4.
For more rapid and intelligent use, the data of the revolution speed signal sensor 4 may be sent to the ECU controller 3.
The invention also provides a method for predicting the service life of the engine oil filter element, which is provided with any one of the engine oil filter element service life prediction systems, wherein the method comprises the following steps:
when the engine oil temperature of the engine is determined to reach a preset temperature condition, receiving a pressure difference value on two sides of the filter element and the engine rotating speed obtained through detection;
calculating the pressure difference value under the rated rotating speed according to the measured pressure difference value and the rotating speed pressure difference curve;
comparing the calculated pressure difference value under the rated rotating speed with a pressure difference service life curve to obtain a service life proportion;
if the service life ratio exceeds the set range, the replacement of the filter element is prompted.
Specifically, the temperature sensor 2 detects the temperature of the engine oil, and the ECU controller 3 judges whether the temperature exceeds a preset value; if the temperature of the engine oil exceeds a preset value, the ECU controller 3 judges the service life according to the data of the pressure sensor 1; the terminal receives the final data.
In some embodiments of the invention, the lifetime ratio is displayed if the lifetime ratio does not exceed a set range.
In some embodiments of the present invention, the pressure difference across the filter element and the engine speed obtained by the detection are received by the ECU controller 3;
calculating a pressure difference value under a rated rotating speed through the ECU controller 3, and comparing the calculated pressure difference value under the rated rotating speed with a pressure difference service life curve to obtain a service life proportion;
specifically, the ECU controller 3 compares the rated rotation speed differential pressure value with the data in the storage unit to obtain the current service life, and the filter element is replaced when the ratio obtained by comparing the current service life with the total service life in the storage unit is greater than a preset value. The storage unit stores a rotating speed differential pressure curve and a differential pressure service life curve. And if the ratio obtained by comparing the current service life with the total service life value is not greater than the set value, displaying the current ratio on the display.
In some embodiments of the invention, when the engine oil temperature of the engine reaches 80 ℃, the pressure difference value of the two sides of the filter element and the engine speed are obtained through detection.
In some embodiments of the invention, if the percentage of life exceeds 90%, replacement of the filter cartridge is prompted. The preset value of the ratio of the current usage time to the total life value is 90%. And (4) replacing the filter element when the ratio value is judged to be larger than 90%, and displaying only the current ratio when the ratio value is not larger than 90%.
When the engine oil filter element service life prediction system works, the ECU controller 3 receives a rotating speed signal, a filter element differential pressure signal and an engine oil temperature signal of an engine, and when the engine oil temperature is higher than 80 ℃, the filter element differential pressure at the rated rotating speed of the engine is calculated according to the differential pressure at the current rotating speed according to the table 1. And comparing the differential pressure with the differential pressure of the filter element blockage service life curve shown in the table 2 to obtain the proportion of the service time of the filter element in the service life of the filter element and output the percentage of the service life of the filter element. When the value is more than 90%, the filter element is prompted to be replaced. When the value is less than 90%, the percentage of used life is displayed on the meter.
In conclusion, in the method for predicting the service life of the engine oil filter element, the pressure difference value under the rated rotating speed is calculated through the measured pressure difference value and the rotating speed differential pressure curve; comparing the calculated pressure difference value under the rated rotating speed with a pressure difference service life curve to obtain a service life proportion; if the service life ratio exceeds the set range, the replacement of the filter element is prompted. Therefore, the filter element can be timely replaced, damage to the engine is avoided, and waste caused by replacement of the filter element in advance is avoided.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A method of predicting oil filter life, comprising the steps of:
when the engine oil temperature of the engine is determined to reach a preset temperature condition, receiving a pressure difference value on two sides of the filter element and the engine rotating speed obtained through detection;
calculating the pressure difference value under the rated rotating speed according to the measured pressure difference value and the rotating speed pressure difference curve;
comparing the calculated pressure difference value under the rated rotating speed with a pressure difference service life curve to obtain a service life proportion;
if the life ratio does not exceed the set range, displaying the life ratio;
if the service life ratio exceeds the set range, the replacement of the filter element is prompted.
2. The method of predicting oil filter life according to claim 1,
receiving a pressure difference value and an engine rotating speed of the two sides of the filter element obtained through detection through an ECU controller;
and calculating a pressure difference value under the rated rotating speed through the ECU controller, and comparing the calculated pressure difference value under the rated rotating speed with a pressure difference service life curve to obtain a service life ratio.
3. The method of predicting oil filter life according to claim 1,
and when the engine oil temperature of the engine reaches 80 ℃, receiving and detecting the pressure difference value at the two sides of the filter element and the engine rotating speed.
4. The method of predicting oil filter life according to claim 1,
if the service life proportion exceeds 90%, the filter element replacement is prompted.
5. An engine oil filter element life prediction system implementing the method of predicting engine oil filter element life of any one of claims 1 to 4, comprising:
the signal acquisition device comprises a temperature sensor for measuring the temperature of the engine oil and at least two pressure sensors arranged on two sides of the filter element;
the ECU controller judges the service life according to the data measured by the pressure sensor and the temperature sensor;
and the terminal receives the final data judged by the ECU controller.
6. The engine oil filter life prediction system of claim 5, wherein the ECU controller comprises a determination unit and a processing unit, wherein the determination unit determines whether the temperature value detected by the temperature sensor reaches a preset value, thereby turning on or off the processing unit.
7. The system of claim 6, wherein the processing unit determines the service life based on a differential pressure of the pressure sensor when the temperature of the engine oil reaches a predetermined value.
8. The oil filter cartridge life prediction system of claim 7, wherein the terminal is a display coupled to the processing unit, the display capable of displaying the processing unit's signal.
9. The oil filter element life prediction system of claim 5, wherein the signal acquisition device further comprises a rotational speed signal sensor for measuring rotational speed, the ECU controller being capable of receiving a signal from the rotational speed signal sensor.
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| CN112096482B (en) * | 2019-12-02 | 2022-05-03 | 长城汽车股份有限公司 | Engine oil maintenance control method and device |
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| CN110953103A (en) * | 2019-12-09 | 2020-04-03 | 三一重机有限公司 | Fuel oil filter service life early warning system, early warning method and early warning device |
| CN112145291B (en) * | 2020-09-08 | 2021-08-20 | 潍柴重机股份有限公司 | Filter element maintenance prompting method based on front-back pressure difference trend of filter |
| CN113101734B (en) * | 2021-04-29 | 2023-05-30 | 三一重机有限公司 | Health assessment method, device and system for filter element and mechanical equipment |
| CN113295596A (en) * | 2021-06-09 | 2021-08-24 | 瑞安市力硕汽车部件有限公司 | Diesel oil filter and method for detecting filter element filtering capacity and service life of diesel oil filter |
| CN113476943B (en) * | 2021-07-05 | 2022-09-13 | 上海三一重机股份有限公司 | Filter element blockage judging method and system and excavator |
| CN113457267B (en) * | 2021-07-22 | 2023-04-07 | 蜂巢传动系统(江苏)有限公司保定研发分公司 | Filter element service life monitoring method and device of oil filter and vehicle |
| CN114236425A (en) * | 2021-11-12 | 2022-03-25 | 潍柴动力股份有限公司 | Method for determining oil filter blockage of filter and related equipment |
| CN114961994B (en) * | 2022-03-31 | 2024-05-17 | 潍柴动力股份有限公司 | Intercooler cleaning determination method and engine |
| CN115146451B (en) * | 2022-06-15 | 2023-07-21 | 九江七所精密机电科技有限公司 | Method and device for predicting residual life of oil filter element |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010059327A (en) * | 1999-12-30 | 2001-07-06 | 이계안 | System for measuring flow rate |
| CN105604638A (en) * | 2014-11-22 | 2016-05-25 | 江阴皇润车业有限公司 | Vehicle filtering device capable of alarming |
| CN106383013A (en) * | 2016-08-17 | 2017-02-08 | 潍柴动力股份有限公司 | Oil filter anti-counterfeiting and service life diagnosis system |
| CN107975397A (en) * | 2016-10-21 | 2018-05-01 | 江苏盈丰智能工程科技有限公司 | A kind of automobile-used filter that can be alarmed |
-
2019
- 2019-09-24 CN CN201910902418.4A patent/CN110410173B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010059327A (en) * | 1999-12-30 | 2001-07-06 | 이계안 | System for measuring flow rate |
| CN105604638A (en) * | 2014-11-22 | 2016-05-25 | 江阴皇润车业有限公司 | Vehicle filtering device capable of alarming |
| CN106383013A (en) * | 2016-08-17 | 2017-02-08 | 潍柴动力股份有限公司 | Oil filter anti-counterfeiting and service life diagnosis system |
| CN107975397A (en) * | 2016-10-21 | 2018-05-01 | 江苏盈丰智能工程科技有限公司 | A kind of automobile-used filter that can be alarmed |
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