CN112729785B - Filter element fault detection method, device, equipment, medium and product - Google Patents
Filter element fault detection method, device, equipment, medium and product Download PDFInfo
- Publication number
- CN112729785B CN112729785B CN202011492670.1A CN202011492670A CN112729785B CN 112729785 B CN112729785 B CN 112729785B CN 202011492670 A CN202011492670 A CN 202011492670A CN 112729785 B CN112729785 B CN 112729785B
- Authority
- CN
- China
- Prior art keywords
- temperature
- time
- hydraulic oil
- filter element
- controlling
- 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.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
Abstract
The embodiment of the invention provides a method, a device, equipment, a medium and a product for detecting filter element faults, wherein the method comprises the following steps: acquiring the initial temperature of hydraulic oil in a filter element, and determining the first time for controlling the temperature of the hydraulic oil to rise when an engine is in an idle state according to the initial temperature; acquiring the current load rate of the engine, and determining second time for controlling the temperature of the hydraulic oil to rise according to the current load rate; if the first time is larger than the second time, controlling the temperature of the hydraulic oil to rise for the first time, and then obtaining pressure values at two ends of the filter element; and if the pressure difference between the pressure values at the two ends of the filter element is larger than the preset pressure difference threshold value, determining that the filter element has a blockage fault. The accuracy rate of determining whether the filter element is blocked or not is improved, the problem of false alarm is effectively reduced, and the normal operation of the vehicle is ensured.
Description
Technical Field
The embodiment of the invention relates to the technical field of vehicles, in particular to a filter element fault detection method, a filter element fault detection device, filter element fault detection equipment, a filter element fault detection medium and a filter element fault detection product.
Background
When the vehicle is running, the filter element has the function of filtering impurities and scrap iron in the hydraulic oil. In order not to influence the normal operation of the speed changing bridge, whether the filter element is blocked or not needs to be detected.
In the prior art, when detecting whether a filter element is blocked, the filter element is generally determined to be blocked by detecting pressure values at two ends of the filter element when a pressure difference between the pressure values at the two ends is greater than a preset pressure difference threshold value.
The detection mode of whether the filter element breaks down in the prior art does not consider the viscosity and the fluidity of hydraulic oil at different temperatures, so that the accuracy of the filter element which is determined to have a blocking fault is lower when the pressure difference between two pressure values is greater than a preset pressure difference threshold value, and the problem of error reporting is serious, thereby seriously affecting the normal operation of a vehicle.
Disclosure of Invention
The embodiment of the invention provides a filter element fault detection method, a filter element fault detection device, a filter element fault detection medium and a filter element fault detection product, and solves the technical problems that in the prior art, viscosity and fluidity of hydraulic oil at different temperatures are not considered, the accuracy of determining that a filter element is blocked is low when the pressure difference between two pressure values is larger than a preset threshold value, error reporting is serious, and normal operation of a vehicle is seriously influenced.
In a first aspect, an embodiment of the present invention provides a filter element fault detection method, including:
acquiring the initial temperature of hydraulic oil in a filter element, and determining the first time for controlling the temperature of the hydraulic oil to rise when an engine is in an idle state according to the initial temperature;
acquiring the current load rate of an engine, and determining second time for controlling the temperature of hydraulic oil to rise according to the current load rate;
if the first time is larger than the second time, controlling the temperature of the hydraulic oil to rise for the first time, and then obtaining pressure values at two ends of the filter element;
and if the pressure difference between the pressure values at the two ends of the filter element is larger than the preset pressure difference threshold value, determining that the filter element has a blockage fault.
Optionally, as in the method described above, while controlling the temperature of the hydraulic oil to increase for the first time, the method further includes:
and controlling the highest input rotating speed of the gearbox to be smaller than a first preset rotating speed threshold value in the first time, and controlling the vehicle speed to be smaller than a preset vehicle speed threshold value.
Optionally, as described above, if it is determined that the first time is less than or equal to the second time, the method further includes:
controlling the speed limiting of the gearbox within a second time and controlling the rotating speed of the engine to be reduced to a second preset rotating speed threshold value;
if the time for controlling the temperature of the hydraulic oil to rise is determined to be equal to the sum of the second time and a preset time period, acquiring the temperature of the hydraulic oil;
if the temperature of the hydraulic oil is determined to be greater than or equal to a preset temperature threshold value, executing the step of acquiring pressure values at two ends of the filter element;
and if the temperature of the hydraulic oil is smaller than the preset temperature threshold value, controlling the engine to stop.
Optionally, the method before determining the first time for controlling the temperature of the hydraulic oil to rise when the engine is in the idle state according to the initial temperature of the hydraulic oil further comprises:
and constructing a mapping relation between each initial temperature of the hydraulic oil and the first time for controlling the temperature rise of the hydraulic oil.
Optionally, the method described above, before determining the second time for controlling the temperature of the hydraulic oil to increase according to the current load factor, further includes:
and constructing a mapping relation between each load rate of the engine and the second time for controlling the temperature rise of the hydraulic oil.
Optionally, the method as described above, further comprising:
and if the pressure difference between the pressure values at the two ends of the filter element is smaller than or equal to the preset pressure difference threshold value, determining that the filter element is not blocked.
In a second aspect, an embodiment of the present invention provides a filter element fault detection apparatus, including:
the first determination module is used for acquiring the initial temperature of hydraulic oil in the filter element and determining the first time for controlling the temperature of the hydraulic oil to rise when the engine is in an idling state according to the initial temperature;
the first determining module is further used for obtaining the current load rate of the engine and determining second time for controlling the temperature of the hydraulic oil to rise according to the current load rate;
the control module is used for controlling the temperature of the hydraulic oil to rise for the first time and then acquiring pressure values at two ends of the filter element if the first time is determined to be greater than the second time;
and the second determination module is used for determining that the filter element has a blockage fault if the pressure difference between the pressure values at the two ends of the filter element is greater than the preset pressure difference threshold value.
Optionally, in the apparatus described above, the control module is further configured to control the temperature of the hydraulic oil to increase for the first time, and further includes:
and controlling the highest input rotating speed of the gearbox to be smaller than a first preset rotating speed threshold value in the first time, and controlling the vehicle speed to be smaller than a preset vehicle speed threshold value.
Optionally, in the apparatus described above, the control module is further configured to: if the first time is determined to be less than or equal to the second time, controlling the speed limiting of the gearbox and the speed reduction of the engine to a second preset speed threshold value within the second time;
if the time for controlling the temperature of the hydraulic oil to rise is determined to be equal to the sum of the second time and a preset time period, acquiring the temperature of the hydraulic oil;
if the temperature of the hydraulic oil is determined to be greater than or equal to a preset temperature threshold value, executing the step of acquiring pressure values at two ends of the filter element;
and if the temperature of the hydraulic oil is smaller than the preset temperature threshold value, controlling the engine to stop.
Optionally, the apparatus as described above, further comprising: and the construction module is used for constructing a mapping relation between each initial temperature of the hydraulic oil and the first time for controlling the temperature rise of the hydraulic oil.
Optionally, the apparatus as described above, the building block is further configured to:
and constructing a mapping relation between each load rate of the engine and the second time for controlling the temperature rise of the hydraulic oil.
Optionally, in the apparatus as described above, the second determining module is further configured to:
and if the pressure difference between the pressure values at the two ends of the filter element is smaller than or equal to the preset pressure difference threshold value, determining that the filter element is not blocked.
In a third aspect, an embodiment of the present invention provides a filter element fault detection apparatus, including: a memory, a processor, and a computer program;
wherein the computer program is stored in the memory and configured to be executed by the processor to implement the method of any of the first aspects.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored, the computer program being executed by a processor to implement the method according to any one of the first aspect.
In a fifth aspect, an embodiment of the present invention provides a computer program product, which includes a computer program that, when executed by a processor, implements the method of any one of the first aspects.
The embodiment of the invention provides a filter element fault detection method, a device, equipment, a medium and a product, wherein the initial temperature of hydraulic oil in a filter element is obtained, and the first time for controlling the temperature of the hydraulic oil to rise when an engine is in an idling state is determined according to the initial temperature; acquiring the current load rate of the engine, and determining second time for controlling the temperature of the hydraulic oil to rise according to the current load rate; if the first time is larger than the second time, controlling the temperature of the hydraulic oil to rise for the first time, and then obtaining pressure values at two ends of the filter element; if the pressure difference between the pressure values at the two ends of the filter element is larger than the preset pressure difference threshold value, the filter element is determined to have the blocking fault, when the first time is larger than the second time, the temperature of the hydraulic oil can be ensured to reach the preset temperature threshold value after the temperature of the hydraulic oil is controlled to rise for the first time, and therefore the phenomena that the viscosity of the hydraulic oil is large and the mobility is poor due to too low temperature, the pressure difference between the pressure values at the two ends is obviously increased, and whether the blocking fault of the filter element is inaccurate or not is determined are effectively avoided. The accuracy rate of determining whether the filter element is blocked or not is improved, the problem of false alarm is effectively reduced, and the normal operation of the vehicle is ensured.
It should be understood that what is described in the summary above is not intended to limit key or critical features of embodiments of the invention, nor is it intended to limit the scope of the invention. Other features of the present invention will become apparent from the following description.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of hydraulic oil temperature versus flow;
FIG. 2 is a flow chart of a method for detecting a failure in a filter cartridge according to an embodiment of the present invention;
FIG. 3 is a flow chart of a method for filter cartridge fault detection according to another embodiment of the present invention;
fig. 4 is a schematic structural diagram of a filter element failure detection apparatus according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a filter element failure detection device according to another embodiment of the present invention;
fig. 6 is a schematic structural diagram of a filter element fault detection apparatus according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, but rather are provided for a more thorough and complete understanding of the present invention. It should be understood that the drawings and the embodiments of the invention are for illustration purposes only and are not intended to limit the scope of the invention.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, and in the above-described drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
For clear understanding of the technical solutions of the embodiments of the present invention, the prior art solutions are first described in detail.
First, the vehicle operation principle will be briefly explained. After the engine rotates, the hydraulic pump outputs a high-pressure signal to control the clutch of the gearbox to be closed, hydraulic oil enters the gearbox, the filter element filters the hydraulic oil, and the clutch is closed to drive the speed changing bridge to work.
In the prior art, when detecting whether a filter element is blocked, the filter element is generally determined to be blocked by monitoring pressure values at two ends of the filter element and determining that the filter element is blocked when a pressure difference between the pressure values at the two ends is greater than a preset pressure difference threshold value. After the filter element is blocked, the flow of the hydraulic oil is seriously insufficient, and the normal work of the speed changing bridge cannot be maintained. Therefore, after the filter element is determined to have the blockage fault, a filter element blockage fault message is sent out so as to execute the protection measures on the gearbox.
In the prior art, the preset pressure difference threshold value is a fixed value, and the problems of viscosity and fluidity of hydraulic oil at different temperatures are not considered. The viscosity and fluidity of the hydraulic oil are greatly affected by the temperature of the hydraulic oil. As shown in fig. 1, the flow rate difference of the pipelines with the same aperture at different hydraulic oil temperatures is large, mainly caused by the different viscosities of the hydraulic oil, so that at a lower temperature, the pressure difference between the pressure value at the inlet end of the filter element and the pressure value at the outlet end of the filter element is obviously increased, the obvious increase of the pressure difference is not caused by the fact that impurities exist in the hydraulic oil, iron chips and the like reduce the permeability of the filter element, but caused by the fact that the fluidity is small because the temperature of the hydraulic oil is low, but as long as the pressure difference is greater than a preset pressure difference threshold value, a filter element blockage fault message can be sent out, the accuracy for determining the occurrence of the blockage fault of the filter element is low, the problem of error reporting is serious, and the normal operation of a vehicle is seriously influenced.
Aiming at the technical problems, the inventor conducts creative research to find that a mapping relation between each initial temperature of hydraulic oil and a first time for controlling the temperature rise of the hydraulic oil and a mapping relation between each load rate of an engine and a second time for controlling the temperature rise of the hydraulic oil can be pre-established, the initial temperature of the hydraulic oil in a filter element is obtained, the first time for controlling the temperature rise of the hydraulic oil when the engine is in an idle state is determined according to the initial temperature, the current load rate of the engine is obtained, the second time for controlling the temperature rise of the hydraulic oil is determined according to the current load rate, the first time is compared with the second time, if the first time is determined to be greater than the second time, the temperature of the hydraulic oil is controlled to rise by the first time, after the first time, the temperature of the hydraulic oil can reach a preset temperature threshold value as much as possible, and then pressure values at two ends of the filter element are obtained, and determining whether the filter element is blocked according to the pressure difference between the pressure values at the two ends of the filter element. When the first time is longer than the second time, the temperature of the hydraulic oil can be ensured to be capable of presetting a temperature threshold value as far as possible after the temperature of the hydraulic oil is controlled to rise for the first time, so that the phenomenon that the pressure difference between pressure values at two ends is obviously increased due to large viscosity and poor fluidity of the hydraulic oil caused by too low temperature is effectively avoided, and further whether the filter element is subjected to inaccurate blockage failure is determined. The accuracy rate of determining whether the filter element is blocked or not is improved, the problem of false alarm is effectively reduced, and the normal operation of the vehicle is ensured.
The technical means of the present invention will be described in detail with reference to specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present invention will be described below with reference to the accompanying drawings.
Example one
Fig. 2 is a flowchart of a filter element fault detection method according to an embodiment of the present invention, and as shown in fig. 2, an execution main body of the embodiment is a filter element fault detection device, and the filter element fault detection device may be integrated in a vehicle control unit, so that the filter element fault detection method according to the embodiment includes the following steps.
Step 101, obtaining an initial temperature of hydraulic oil in a filter element, and determining a first time for controlling the temperature of the hydraulic oil to rise when an engine is in an idling state according to the initial temperature.
In this embodiment, a temperature sensor may be provided in the transmission case, and the temperature sensor may detect the temperature of the hydraulic oil in the filter element. When the filter element fault detection device monitors that the engine is in an idling state, a temperature detection instruction is sent to the temperature sensor, the temperature sensor detects the temperature of the hydraulic oil to obtain an initial temperature, the initial temperature is sent to the filter element fault detection device, and the filter element fault detection device obtains the initial temperature of the hydraulic oil.
In this embodiment, the first time is a time for controlling the temperature of the hydraulic oil to increase by the initial temperature.
Specifically, in the present embodiment, a mapping relationship between each initial temperature of the hydraulic oil and the first time at which the temperature of the hydraulic oil is controlled to increase when the engine is in the idle state is previously constructed. In the mapping relation, the temperature of the hydraulic oil reaches a preset temperature threshold value after the temperature of the hydraulic oil is controlled to rise for the first time, which is determined by multiple tests, and the preset temperature threshold value is the temperature at which the viscosity and the fluidity of the hydraulic oil have no influence on the detection of the pressure values at two ends of the hydraulic oil. Then, according to the initial temperature and the mapping relation, a first time corresponding to the initial temperature is determined.
And 102, acquiring the current load rate of the engine, and determining a second time for controlling the temperature of the hydraulic oil to rise according to the current load rate.
In the embodiment, after the engine is started, the running parameter information of the engine is arranged in the ECU or the gearbox, and the current load rate of the engine can be obtained by communicating with the ECU or the gearbox.
In this embodiment, the second time is the time for controlling the temperature of the hydraulic oil to rise determined by the current load factor of the engine.
Specifically, in the present embodiment, a map of each load factor of the engine and the second time at which the temperature of the hydraulic oil is controlled to rise is constructed in advance. In the mapping relation, after the temperature of the control hydraulic oil is determined to rise for the second time through multiple tests, the temperature of the hydraulic oil reaches a preset temperature threshold value, and the preset temperature threshold value is the temperature which enables the viscosity and the fluidity of the hydraulic oil to have no influence on the detection of the pressure values at the two ends of the hydraulic oil. Then, a second time corresponding to the current load rate of the engine is determined based on the current load rate of the engine and the mapping relationship.
And 103, if the first time is larger than the second time, controlling the temperature of the hydraulic oil to rise for the first time, and then obtaining pressure values at two ends of the filter element.
In this embodiment, in order to guarantee that control hydraulic oil temperature rises, and before carrying out the pressure detection at filter core both ends, the temperature of hydraulic oil reaches preset temperature threshold value as far as possible, so compare the time of the day one with the second time, if confirm that the time of the day one is greater than the second time, then control sender idle state reaches the time of the day one, in the engine idle process, hydraulic oil temperature rise time of the day one, after the time of the day one, the temperature of hydraulic oil has reached preset temperature threshold value as far as possible, the steerable pressure sensor that is located at filter core both ends detects the pressure value at filter core both ends this moment again. And sending the pressure values to a filter element fault detection device after detecting the pressure values at the two ends of the filter element, and acquiring the pressure values at the two ends of the filter element by the filter element fault detection device.
And 104, if the pressure difference between the pressure values at the two ends of the filter element is larger than the preset pressure difference threshold value, determining that the filter element has a blockage fault.
In this embodiment, calculate the pressure difference between the pressure value at filter core both ends to compare pressure difference and preset pressure difference threshold value, if confirm that the pressure difference between the pressure value at filter core both ends is greater than preset pressure difference threshold value, then explain under the condition of avoiding hydraulic oil to influence the pressure value at the lower temperature, because the filter core has been caused to take place to block up the trouble because the permeability that contains material such as more impurity, iron fillings in the filter core reduces, then confirm that the filter core takes place to block up the trouble.
According to the filter element fault detection method provided by the embodiment, the initial temperature of the hydraulic oil in the filter element is obtained, and the first time for controlling the temperature of the hydraulic oil to rise when the engine is in an idle state is determined according to the initial temperature; acquiring the current load rate of the engine, and determining second time for controlling the temperature of the hydraulic oil to rise according to the current load rate; if the first time is larger than the second time, controlling the temperature of the hydraulic oil to rise for the first time, and then obtaining pressure values at two ends of the filter element; and if the pressure difference between the pressure values at the two ends of the filter element is larger than the preset pressure difference threshold value, determining that the filter element has a blockage fault. When the first time is greater than the second time, the temperature of the hydraulic oil can be ensured to reach the preset temperature threshold value as far as possible after the temperature of the hydraulic oil is controlled to rise for the first time, so that the phenomenon that the filter element is determined to be inaccurate in blocking fault due to the fact that the viscosity of the hydraulic oil is high and the mobility of the hydraulic oil is poor due to too low temperature is effectively avoided, and the pressure difference between pressure values at two ends is obviously increased. The accuracy rate of determining whether the filter element is blocked or not is improved, the problem of false alarm is effectively reduced, and the normal operation of the vehicle is ensured.
Example two
Fig. 3 is a flowchart of a filter element failure detection method according to another embodiment of the present invention, and as shown in fig. 3, the filter element failure detection method according to this embodiment is based on the filter element failure detection method according to the first embodiment of the present invention, and further includes other steps, so that the filter element failure detection method according to this embodiment includes the following steps.
Step 201, constructing a mapping relation between each initial temperature of the hydraulic oil and the first time for controlling the temperature rise of the hydraulic oil.
In this embodiment, the mapping relationship between each initial temperature of the hydraulic oil and the first time for controlling the temperature rise of the hydraulic oil is constructed after a plurality of tests are performed at the idle speed of the engine. The lower the initial temperature of the hydraulic oil, the greater the corresponding first time to control the temperature rise of the hydraulic oil. Conversely, the higher the initial temperature of the hydraulic oil is, the smaller the first time for correspondingly controlling the temperature of the hydraulic oil to rise is.
It should be noted that, in the mapping relationship, the temperature of the hydraulic oil reaches the preset temperature threshold after the temperature of the hydraulic oil is controlled to rise for the first time, which is determined through multiple tests.
And 202, constructing a mapping relation between each load rate of the engine and the second time for controlling the temperature of the hydraulic oil to rise.
In this embodiment, after a plurality of tests, a mapping relation between each load rate of the engine and the second time is established when the temperature of the hydraulic oil reaches a preset temperature threshold after the engine controls the temperature of the hydraulic oil to increase for the second time under each load rate.
Wherein, the higher the load factor of the engine, the smaller the first time for the corresponding control hydraulic oil temperature to rise. Conversely, the lower the load factor of the engine, the greater the first time for the corresponding control hydraulic oil temperature to rise.
It should be noted that, if the mapping relationship between each initial temperature of the hydraulic oil and the first time for controlling the temperature of the hydraulic oil to increase and the mapping relationship between each load factor of the engine and the second time for controlling the temperature of the hydraulic oil to increase are constructed in advance, the steps 201 to 202 need not to be executed again.
And 203, acquiring the initial temperature of the hydraulic oil in the filter element, and determining the first time for controlling the temperature of the hydraulic oil to rise when the engine is in an idle state according to the initial temperature.
And step 204, acquiring the current load rate of the engine, and determining second time for controlling the temperature of the hydraulic oil to rise according to the current load rate.
In this embodiment, the implementation manners of steps 203 to 204 are similar to those of steps 101 to 102 in the first embodiment of the present invention, and are not described in detail herein.
Step 205, determine whether the first time is greater than the second time, if yes, go to step 206, otherwise go to step 210.
In this embodiment, when the first time is longer than the second time, it indicates that the hydraulic oil can reach the preset temperature threshold as far as possible after the temperature of the hydraulic oil is controlled to rise for the first time. And if the first time is less than or equal to the second time, preferably executing a protection scheme for the gearbox in order to protect the gearbox from being damaged.
And step 206, controlling the highest input rotating speed of the gearbox to be smaller than a first preset rotating speed threshold value in the first time while controlling the temperature of the hydraulic oil to rise for the first time, and controlling the vehicle speed to be smaller than a preset vehicle speed threshold value.
In this embodiment, since the temperature rise of the hydraulic oil is a gradual process, in order to protect the transmission case when the temperature of the hydraulic oil is low, the maximum input rotation speed of the transmission case is controlled to be less than a first preset rotation speed threshold value within a first time while the temperature of the hydraulic oil is controlled to rise for the first time, and the vehicle speed is controlled to be less than a preset vehicle speed threshold value.
The first preset rotating speed threshold value is a preset rotating speed value of the gearbox, and the preset vehicle speed threshold value is a preset vehicle speed value. The first preset rotational speed threshold and the preset vehicle speed threshold are relatively small values. The maximum input rotating speed of the gearbox is controlled to be smaller than a first preset rotating speed threshold value in the first time, the vehicle speed is controlled to be smaller than a preset vehicle speed threshold value, the maximum input rotating speed and the vehicle speed of the gearbox can be effectively limited, and the gearbox is protected.
It should be noted that step 207 is executed after controlling the hydraulic oil temperature to increase for the first time.
And step 207, acquiring pressure values at two ends of the filter element.
And 208, if the pressure difference between the pressure values at the two ends of the filter element is larger than the preset pressure difference threshold value, determining that the filter element has a blockage fault.
In this embodiment, the implementation manners of steps 207 to 208 are similar to the implementation manners of the related technical solutions in steps 103 to 104 in the first embodiment of the present invention, and are not described in detail herein.
It will be appreciated that upon determining that a filter element plugging failure has occurred, a filter element plugging failure message is issued.
And step 209, if the pressure difference between the pressure values at the two ends of the filter element is determined to be less than or equal to the preset pressure difference threshold value, determining that the filter element has no blockage fault.
In this embodiment, if it is determined that the pressure difference between the pressure values at the two ends of the filter element is less than or equal to the preset pressure difference threshold, it is determined that the filter element does not have a blockage fault because the filter element does not contain more impurities, iron filings and other substances under the condition that the pressure value is not affected by hydraulic oil at a lower temperature.
Step 210, controlling the gearbox to limit the speed of the vehicle and controlling the engine to reduce the rotating speed to a second preset rotating speed threshold value within a second time; and if the time for controlling the temperature of the hydraulic oil to rise is determined to be equal to the sum of the second time and the preset time period, acquiring the temperature of the hydraulic oil.
In this embodiment, if it is determined that the first time is less than or equal to the second time, in order to protect the transmission from damage, it is prioritized to implement a protection scheme for the transmission. Specifically, the speed of the gearbox is limited within the second time, and the engine is controlled to reduce the rotating speed to a second preset rotating speed threshold value, so that the rotating speed of the gearbox is not too large, and the effect of protecting the gearbox is achieved.
Wherein the second predetermined rotational speed value is a relatively small engine rotational speed value.
In this embodiment, when the speed of the transmission is limited and the engine is controlled to reduce the rotating speed to the second preset rotating speed threshold within the second time, the temperature of the hydraulic oil is controlled to increase for the second time, and in order to increase the temperature of the hydraulic oil to the preset temperature threshold, the temperature of the hydraulic oil is controlled to increase for the preset time period, and then the temperature of the hydraulic oil is obtained through the temperature sensor.
The value of the preset time period is not limited, and may be, for example, 3 minutes, 5 minutes, or the like.
Step 211, determining whether the temperature of the hydraulic oil is greater than or equal to a preset temperature threshold, if so, executing step 207, otherwise, executing step 212.
In step 212, the engine is controlled to stall.
In this embodiment, the temperature of the hydraulic oil obtained in step 210 is compared with a preset temperature threshold, and if it is determined that the temperature of the hydraulic oil is greater than or equal to the preset temperature threshold, it is indicated that the step of obtaining pressure values at two ends of the filter element can be executed, and then whether the filter element fails or not is determined according to the pressure difference between the pressure values. If the temperature of the hydraulic oil is determined to be smaller than the preset temperature threshold, even if the temperature of the hydraulic oil is increased for the second time and the preset time period, the temperature of the hydraulic oil cannot reach the preset temperature threshold, and whether the filter element is blocked or not cannot be detected.
According to the filter element fault detection method provided by the embodiment, after the first time is determined to be less than or equal to the second time, the speed of the gearbox is controlled to be limited within the second time, and the rotating speed of the engine is controlled to be reduced to the second preset rotating speed threshold; if the time for controlling the temperature of the hydraulic oil to rise is determined to be equal to the sum of the second time and the preset time period, the temperature of the hydraulic oil is obtained, whether the temperature of the hydraulic oil is larger than or equal to a preset temperature threshold value is judged, if yes, the step of obtaining pressure values at two ends of the filter element is executed, otherwise, the engine is controlled to be shut down, and whether the filter element is blocked or not can be detected under the condition that the gearbox is enough and safe. The safety of the gearbox when the filter element is detected to be blocked or not is improved.
EXAMPLE III
Fig. 4 is a schematic structural diagram of a filter element failure detection device according to an embodiment of the present invention, and as shown in fig. 4, a filter element failure detection device 30 according to the embodiment includes: a first determination module 31, a control module 32, and a second determination module 33.
The first determining module 31 is configured to obtain an initial temperature of hydraulic oil in the filter element, and determine a first time when the temperature of the hydraulic oil rises when the engine is in an idle state according to the initial temperature. The first determination module 31 is further configured to obtain a current load rate of the engine, and determine a second time for controlling the temperature of the hydraulic oil to increase according to the current load rate. And the control module 32 is configured to, if it is determined that the first time is greater than the second time, control the temperature of the hydraulic oil to rise for the first time, and then obtain pressure values at two ends of the filter element. And a second determining module 33, configured to determine that a blockage fault occurs in the filter element if it is determined that the pressure difference between the pressure values at the two ends of the filter element is greater than the preset pressure difference threshold.
The filter element fault detection apparatus provided in this embodiment may implement the technical solution of the method embodiment shown in fig. 2, and the implementation principle and technical effect are similar, which are not described herein again.
Example four
Fig. 5 is a schematic structural diagram of a filter element failure detection apparatus according to another embodiment of the present invention, and as shown in fig. 5, the filter element failure detection apparatus 40 according to the present embodiment further includes, on the basis of the filter element failure detection apparatus according to the third embodiment: a module 41 is constructed.
Optionally, the control module 32 is further configured to control the temperature of the hydraulic oil to increase for the first time, and further includes:
and controlling the highest input rotating speed of the gearbox to be smaller than a first preset rotating speed threshold value in the first time, and controlling the vehicle speed to be smaller than a preset vehicle speed threshold value.
Optionally, the control module 32 is further configured to: if the first time is determined to be less than or equal to the second time, controlling the speed limiting of the gearbox and the speed reduction of the engine to a second preset speed threshold value within the second time;
if the time for controlling the temperature of the hydraulic oil to rise is determined to be equal to the sum of the second time and the preset time period, acquiring the temperature of the hydraulic oil;
if the temperature of the hydraulic oil is determined to be greater than or equal to the preset temperature threshold, executing a step of acquiring pressure values at two ends of the filter element;
and if the temperature of the hydraulic oil is smaller than the preset temperature threshold value, controlling the engine to stop.
Optionally, the building module 41 is configured to build a mapping relationship between each initial temperature of the hydraulic oil and a first time for controlling the temperature of the hydraulic oil to increase.
Optionally, the building block 41 is further configured to:
and constructing a mapping relation between each load rate of the engine and the second time for controlling the temperature rise of the hydraulic oil.
Optionally, the second determining module 33 is further configured to:
and if the pressure difference between the pressure values at the two ends of the filter element is smaller than or equal to the preset pressure difference threshold value, determining that the filter element is not blocked.
The filter element fault detection apparatus provided in this embodiment may implement the technical scheme of the method embodiment shown in fig. 3, and the implementation principle and technical effect are similar, which are not described herein again.
EXAMPLE five
Fig. 6 is a schematic structural diagram of a filter cartridge failure detection apparatus according to an embodiment of the present invention, and as shown in fig. 6, a filter cartridge failure detection apparatus 50 according to an embodiment of the present invention includes: a memory 51, a processor 52 and a computer program.
Wherein the computer program is stored in the memory 51 and configured to be executed by the processor 52 to implement the filter element failure detection method in the first embodiment or the second embodiment. The related description may be understood by referring to the related description and effect corresponding to the steps in fig. 2 to fig. 3, and redundant description is not repeated here.
In the present embodiment, the memory 51 and the processor 52 are connected by a bus.
The embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement the method for detecting a failure of a filter cartridge in the first embodiment or the second embodiment.
An embodiment of the present invention further provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the method for detecting a failure of a filter element in the first embodiment or the second embodiment is implemented.
In the several embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, and for example, a division of modules is merely a division of logical functions, and an actual implementation may have another division, for example, a plurality of modules or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or modules, and may be in an electrical, mechanical or other form.
Modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical modules, may be located in one place, or may be distributed on a plurality of network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
In addition, functional modules in the embodiments of the present invention may be integrated into one processing module, or each of the modules may exist alone physically, or two or more modules are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a mode of hardware and a software functional module.
Program code for implementing the methods of the present invention may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the program codes, when executed by the processor or controller, cause the functions/operations specified in the flowchart and/or block diagram to be performed. The program code may execute entirely on the machine, partly on the machine, as a stand-alone software package partly on the machine and partly on a remote machine or entirely on the remote machine or server.
In the context of the present invention, a machine-readable medium may be a tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. The machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
Further, while operations are depicted in a particular order, this should be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. Under certain circumstances, multitasking and parallel processing may be advantageous. Likewise, while several specific implementation details are included in the above discussion, these should not be construed as limitations on the scope of the disclosure. Certain features that are described in the context of separate embodiments can also be implemented in combination in a single implementation. Conversely, various features that are described in the context of a single implementation can also be implemented in multiple implementations separately or in any suitable subcombination.
Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.
Claims (10)
1. A method of filter cartridge fault detection, comprising:
acquiring the initial temperature of hydraulic oil in a filter element, and determining the first time for controlling the temperature of the hydraulic oil to rise when an engine is in an idle state according to the initial temperature;
acquiring the current load rate of the engine, and determining second time for controlling the temperature of the hydraulic oil to rise according to the current load rate;
if the first time is larger than the second time, controlling the temperature of the hydraulic oil to rise for the first time, and then obtaining pressure values at two ends of the filter element;
and if the pressure difference between the pressure values at the two ends of the filter element is larger than the preset pressure difference threshold value, determining that the filter element has a blockage fault.
2. The method of claim 1, wherein controlling the temperature of the hydraulic oil to increase for the first time further comprises:
and controlling the highest input rotating speed of the gearbox to be smaller than a first preset rotating speed threshold value in the first time, and controlling the vehicle speed to be smaller than a preset vehicle speed threshold value.
3. The method of claim 1, wherein if it is determined that the first time is less than or equal to the second time, further comprising:
controlling the speed limiting of the gearbox within a second time and controlling the rotating speed of the engine to be reduced to a second preset rotating speed threshold value;
if the time for controlling the temperature of the hydraulic oil to rise is determined to be equal to the sum of the second time and a preset time period, acquiring the temperature of the hydraulic oil;
if the temperature of the hydraulic oil is determined to be greater than or equal to a preset temperature threshold value, executing the step of acquiring pressure values at two ends of the filter element;
and if the temperature of the hydraulic oil is smaller than the preset temperature threshold value, controlling the engine to stop.
4. The method of any of claims 1-3, wherein prior to determining the first time to control the temperature of the hydraulic oil to increase while the engine is idling based on the initial temperature of the hydraulic oil, further comprising:
and constructing a mapping relation between each initial temperature of the hydraulic oil and the first time for controlling the temperature rise of the hydraulic oil.
5. The method according to any one of claims 1-3, wherein said determining a second time to control the increase in the hydraulic oil temperature before according to the current load factor further comprises:
and constructing a mapping relation between each load rate of the engine and the second time for controlling the temperature rise of the hydraulic oil.
6. The method according to any one of claims 1-3, further comprising:
and if the pressure difference between the pressure values at the two ends of the filter element is smaller than or equal to the preset pressure difference threshold value, determining that the filter element has no blockage fault.
7. A filter cartridge malfunction detection apparatus, comprising:
the first determining module is used for acquiring the initial temperature of hydraulic oil in the filter element and determining the first time for controlling the temperature of the hydraulic oil to rise when the engine is in an idling state according to the initial temperature;
the first determining module is further used for obtaining the current load rate of the engine and determining second time for controlling the temperature of the hydraulic oil to rise according to the current load rate;
the control module is used for controlling the temperature of the hydraulic oil to rise for the first time and then acquiring pressure values at two ends of the filter element if the first time is determined to be greater than the second time;
and the second determination module is used for determining that the filter element has a blockage fault if the pressure difference between the pressure values at the two ends of the filter element is greater than the preset pressure difference threshold value.
8. A filter cartridge malfunction detection apparatus, comprising:
a memory, a processor, and a computer program;
wherein the computer program is stored in the memory and configured to be executed by the processor to implement the method of any one of claims 1-6.
9. A computer-readable storage medium, having stored thereon a computer program for execution by a processor to perform the method of any one of claims 1-6.
10. A computer program product comprising a computer program, characterized in that the computer program realizes the method of any of claims 1-6 when executed by a processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011492670.1A CN112729785B (en) | 2020-12-16 | 2020-12-16 | Filter element fault detection method, device, equipment, medium and product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011492670.1A CN112729785B (en) | 2020-12-16 | 2020-12-16 | Filter element fault detection method, device, equipment, medium and product |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112729785A CN112729785A (en) | 2021-04-30 |
| CN112729785B true CN112729785B (en) | 2022-07-19 |
Family
ID=75602602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011492670.1A Active CN112729785B (en) | 2020-12-16 | 2020-12-16 | Filter element fault detection method, device, equipment, medium and product |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112729785B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN113494332B (en) * | 2021-07-28 | 2022-10-28 | 潍柴动力股份有限公司 | Control method of hydraulic oil viscosity, related device and computer storage medium |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1333860A (en) * | 1998-12-14 | 2002-01-30 | 法国马涅蒂·马雷利公司 | Method for detecting clogging in a fuel filter in an internal combustion engine supply circuit |
| CN105593506A (en) * | 2013-09-04 | 2016-05-18 | 卡特彼勒Sarl | Fuel filter clogging detection device in fuel supply circuit, and working machine |
| CN105804829A (en) * | 2015-01-16 | 2016-07-27 | 福特环球技术公司 | Filter diagnostics and prognostics |
| CN208918969U (en) * | 2018-09-29 | 2019-05-31 | 山推工程机械股份有限公司 | A kind of differential filter control system |
| CN110486349A (en) * | 2019-07-26 | 2019-11-22 | 中国第一汽车股份有限公司 | A kind of filter failure detection method, hydraulic system, vehicle and storage medium |
| CN111141527A (en) * | 2019-11-20 | 2020-05-12 | 潍柴动力股份有限公司 | Method and system for judging maintenance period of filter element of engine respirator |
| CN112031890A (en) * | 2020-09-16 | 2020-12-04 | 潍柴动力股份有限公司 | Temperature adjusting method, device, system and electronic control unit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080155970A1 (en) * | 2006-12-27 | 2008-07-03 | Detroit Diesel Corporation | Method for verifying the functionality of the components of a diesel particulate filter system |
-
2020
- 2020-12-16 CN CN202011492670.1A patent/CN112729785B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1333860A (en) * | 1998-12-14 | 2002-01-30 | 法国马涅蒂·马雷利公司 | Method for detecting clogging in a fuel filter in an internal combustion engine supply circuit |
| CN105593506A (en) * | 2013-09-04 | 2016-05-18 | 卡特彼勒Sarl | Fuel filter clogging detection device in fuel supply circuit, and working machine |
| CN105804829A (en) * | 2015-01-16 | 2016-07-27 | 福特环球技术公司 | Filter diagnostics and prognostics |
| CN208918969U (en) * | 2018-09-29 | 2019-05-31 | 山推工程机械股份有限公司 | A kind of differential filter control system |
| CN110486349A (en) * | 2019-07-26 | 2019-11-22 | 中国第一汽车股份有限公司 | A kind of filter failure detection method, hydraulic system, vehicle and storage medium |
| CN111141527A (en) * | 2019-11-20 | 2020-05-12 | 潍柴动力股份有限公司 | Method and system for judging maintenance period of filter element of engine respirator |
| CN112031890A (en) * | 2020-09-16 | 2020-12-04 | 潍柴动力股份有限公司 | Temperature adjusting method, device, system and electronic control unit |
Non-Patent Citations (2)
| Title |
|---|
| B.M.Verdegan.Recent developments in oil filter test methods.《Filtration & Separation》.2001,第29卷(第4期),第326-331页. * |
| 陈海滨.关于机油滤清器的检测研究.《轻工科技》.2019,第35卷(第1期),第59-60页. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112729785A (en) | 2021-04-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112729785B (en) | Filter element fault detection method, device, equipment, medium and product | |
| CN109083756B (en) | Engine air inlet fault detection method and device | |
| US7427914B2 (en) | Operator alerting system using a vehicle fault condition prioritization method | |
| CN111751722B (en) | Oil-gas pump motor fault detection method and device | |
| JP4459965B2 (en) | Oil temperature sensor defect detection method for automatic transmission | |
| CN106030059B (en) | Method and control device for monitoring crankcase pressure | |
| CN101896943A (en) | Vehicle information storage apparatus | |
| CN105275690B (en) | Fuel filter abnormal detector | |
| US20060125611A1 (en) | Method and arrangement for suppressing incorrect messages in monitoring systems | |
| CN112943465B (en) | Fault diagnosis method and device for exhaust gas turbocharger | |
| CN111963298B (en) | Electromagnetic clutch water pump fault detection method and device, controller and vehicle | |
| KR20170012291A (en) | Proceeding for flushing of pipes at hydraulic systems and a plant for the flushing | |
| KR100711850B1 (en) | Electronic control system and method having microcomputer monitoring prohibiting function | |
| CN113236456B (en) | Method, device and equipment for detecting running state of filter and storage medium | |
| CN110966130A (en) | Starting motor protection method and device, engineering machinery and storage medium | |
| CN109854701B (en) | Safety interlocking protection method for hydraulic coupler, storage medium and computer equipment | |
| JP2017043166A (en) | Vehicle control device | |
| CN115360389A (en) | Fault detection method and device for sensor, processor and vehicle | |
| CN114088408A (en) | Cooling liquid temperature diagnosis method and device, vehicle and storage medium | |
| CN115303292A (en) | Hydraulic system fault diagnosis method, vehicle driving system control method and vehicle | |
| CN109630647B (en) | Safety interlocking protection device for hydraulic coupler | |
| CN103902424A (en) | Server and temperature anomaly protecting method thereof | |
| CN113818514A (en) | Judgment method, controller and device for flameout of excavator and excavator | |
| CN111290886A (en) | Method for automatically recovering operation of equipment and water heater | |
| CN107807557B (en) | Control method and device for rotary filter screen and terminal equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |