CN111749781B - Method and device for monitoring electric control silicone oil closed-loop clutch fan - Google Patents
Method and device for monitoring electric control silicone oil closed-loop clutch fan Download PDFInfo
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- CN111749781B CN111749781B CN202010640840.XA CN202010640840A CN111749781B CN 111749781 B CN111749781 B CN 111749781B CN 202010640840 A CN202010640840 A CN 202010640840A CN 111749781 B CN111749781 B CN 111749781B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/02—Controlling of coolant flow the coolant being cooling-air
- F01P7/08—Controlling of coolant flow the coolant being cooling-air by cutting in or out of pumps
- F01P7/081—Controlling of coolant flow the coolant being cooling-air by cutting in or out of pumps using clutches, e.g. electro-magnetic or induction clutches
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/14—Safety means against, or active at, failure of coolant-pumps drives, e.g. shutting engine down; Means for indicating functioning of coolant pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/02—Controlling of coolant flow the coolant being cooling-air
- F01P7/04—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
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- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
The monitoring method and the monitoring device for the electric control silicone oil closed-loop clutch fan provided by the invention can be used for acquiring the fan rotating speed of the electric control silicone oil closed-loop clutch fan in real time; monitoring whether the rotating speed of the fan is in an abnormal state for a preset time, wherein the preset time is longer than the longest separation time threshold allowed by a clutch of the electric control silicone oil closed-loop clutch fan; and if so, generating fault information and prompting, wherein the fault information is used for indicating the fan of the electric control silicon oil closed-loop clutch to have the fault that the rotating speed of the fan is abnormally high. According to the scheme, the fan rotating speed of the electric control silicone oil closed-loop clutch fan acquired in real time is monitored, and when the fan rotating speed is monitored to be in an abnormal state for a duration of a preset time, fault information is generated and prompted, so that the purposes of real-time diagnosis and reminding of abnormal faults of the fan rotating speed are achieved.
Description
Technical Field
The invention relates to the technical field of silicone oil fans, in particular to a method and a device for monitoring an electric control silicone oil closed-loop clutch fan.
Background
The electric control silicone oil closed-loop clutch fan is widely applied to various medium and heavy commercial vehicles due to the advantage of accurate control. However, in the using process of the electric control silicone oil closed-loop clutch fan, problems may occur, for example, hardware faults such as poor sealing of an oil storage cavity inside a clutch and failure of a valve hole inside the clutch of the electric control silicone oil closed-loop clutch fan occur, or data calibration problems such as unreasonable regulation of PID control parameters occur, silicone oil is left in a working cavity of the clutch due to the problems, so that the electric control silicone oil closed-loop clutch fan cannot accurately respond to ECU control for a long time, and further an abnormal fault occurs that the clutch cannot be separated for a long time or the actual rotating speed of the electric control silicone oil closed-loop clutch fan is far higher than the normal idle speed even if the clutch is separated, and the abnormal fault brings troubles of low water temperature and high oil consumption to the running of the whole vehicle.
However, there is no technical means for diagnosing and reporting the abnormal fault, so that the abnormal fault cannot be checked in time.
Disclosure of Invention
In view of this, the embodiment of the present invention provides a method and an apparatus for monitoring an electronically controlled silicone oil closed-loop clutch fan, so as to achieve the purpose of diagnosing and reminding an abnormal fault of the electronically controlled silicone oil closed-loop clutch fan.
In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions:
in one aspect, an embodiment of the present invention provides a method for monitoring an electronically controlled silicone oil closed-loop clutch fan, where the method includes:
acquiring the fan rotating speed of an electric control silicone oil closed-loop clutch fan in real time;
monitoring whether the rotating speed of the fan is in an abnormal state for a preset time, wherein the preset time is longer than the longest separation time threshold allowed by a clutch of the electric control silicone oil closed-loop clutch fan;
and if so, generating fault information and prompting, wherein the fault information is used for indicating the fan of the electric control silicon oil closed-loop clutch to have the fault that the rotating speed of the fan is abnormally high.
Optionally, the monitoring whether the fan speed is in an abnormal state for a preset duration includes:
monitoring whether a clutch of the electric control silicone oil closed-loop clutch fan is not separated for a preset duration or not based on the rotating speed of the fan;
and if not, determining that the rotating speed of the fan is in an abnormal state for a preset duration.
Optionally, the monitoring of whether the clutch of the electric control silicone oil closed-loop clutch fan is not disengaged for a preset duration based on the fan speed includes:
starting timing, and judging whether the state of the electric control silicon oil closed-loop clutch fan meets set conditions when the timing reaches the preset time length, wherein the set conditions comprise: the fan of the electric control silicone oil closed-loop clutch has no electromagnetic valve open-circuit fault, a first difference value between a set rotating speed of the fan and a rotating speed of an engine is smaller than a first judgment limit value, a second difference value between the rotating speed of the fan and the rotating speed of the engine is higher than a second judgment limit value, and the second judgment limit value is higher than the first judgment limit value;
and if so, determining that the clutch of the electric control silicone oil closed-loop clutch fan is not separated for a preset duration.
Optionally, the monitoring whether the fan speed is in an abnormal state for a preset duration includes:
monitoring whether a clutch of the electric control silicone oil closed-loop clutch fan is in a separation state for a preset duration or not based on the rotating speed of the fan, wherein the rotating speed of the fan is higher than the normal idle speed of the fan;
and if so, determining that the rotating speed of the fan is in an abnormal state for a preset duration.
Optionally, the monitoring of the fan speed based on whether the clutch of the electric control silicone oil closed-loop clutch fan is in a disengaged state for a preset duration or not, and the fan speed is higher than the normal idle speed of the fan includes:
starting timing, and judging whether the state of the electric control silicon oil closed-loop clutch fan meets set conditions when the timing reaches the preset time length, wherein the set conditions comprise: a second difference value between the rotating speed of the fan and the rotating speed of the engine is smaller than or equal to a second determination limit value, the set rotating speed of the fan is 0, a third difference value between the average value of the rotating speeds of the fan in each counting period and the normal idle speed of the fan is higher than a third determination limit value, the third determination limit value is larger than the second determination limit value, and the counting period is smaller than the longest separation time threshold value allowed by a clutch of the electric control silicone oil closed-loop clutch fan;
and if so, determining that the clutch of the electric control silicon oil closed-loop clutch fan is in a separation state for a preset duration, and the rotating speed of the fan is higher than the normal idle speed of the fan.
On the other hand, the embodiment of the invention provides a monitoring device of an electric control silicone oil closed-loop clutch fan, which comprises an electronic control unit ECU arranged in the electric control silicone oil closed-loop clutch fan and a prompter externally connected to the outside of the electric control silicone oil closed-loop clutch fan;
the electronic control unit ECU is used for acquiring the fan rotating speed of the electric control silicone oil closed-loop clutch fan in real time, and monitoring whether the fan rotating speed is in an abnormal state for a preset duration, wherein the preset duration is greater than the longest separation time threshold allowed by a clutch of the electric control silicone oil closed-loop clutch fan; if so, generating fault information and sending the fault information to a prompter;
and the prompter is used for prompting the fault information, and the fault information is used for indicating the fan of the electric control silicon oil closed-loop clutch to have the fault that the rotating speed of the fan is abnormally high.
Optionally, the ECU for monitoring whether the fan speed is in an abnormal state for a preset duration is specifically configured to:
monitoring whether a clutch of the electric control silicone oil closed-loop clutch fan is not separated for a preset duration or not based on the rotating speed of the fan; if the fan is not separated, determining that the preset duration of the rotating speed of the fan is in an abnormal state; or monitoring whether a clutch of the electric control silicone oil closed-loop clutch fan is in a separation state for a preset duration or not based on the rotating speed of the fan, wherein the rotating speed of the fan is higher than the normal idle speed of the fan; and if so, determining that the preset duration of the rotating speed of the fan is in an abnormal state.
Optionally, the electronic control unit ECU, which monitors whether the clutch of the electronically controlled silicone oil closed-loop clutch fan is not disengaged for a preset duration based on the fan speed, is specifically configured to:
starting timing, and judging whether the state of the electric control silicon oil closed-loop clutch fan meets set conditions when the timing reaches the preset time length, wherein the set conditions comprise: the fan of the electric control silicone oil closed-loop clutch has no electromagnetic valve open-circuit fault, a first difference value between a set rotating speed of the fan and a rotating speed of an engine is smaller than a first judgment limit value, a second difference value between the rotating speed of the fan and the rotating speed of the engine is higher than a second judgment limit value, and the second judgment limit value is higher than the first judgment limit value; and if so, determining that the clutch of the electric control silicone oil closed-loop clutch fan is not separated for a preset duration.
Optionally, the electronic control unit ECU that monitors whether the clutch of the electronically-controlled silicone oil closed-loop clutch fan is in a disengaged state for a preset duration based on the fan speed, and the fan speed is higher than the normal idle speed of the fan is specifically configured to:
starting timing, and judging whether the state of the electric control silicon oil closed-loop clutch fan meets set conditions when the timing reaches the preset time length, wherein the set conditions comprise: the second difference value between the fan rotating speed and the engine rotating speed is smaller than or equal to a second determination limit value, the set rotating speed of the fan is 0, a third difference value between the average value of the fan rotating speed in each counting period and the normal idle speed of the fan is higher than a third determination limit value, the third determination limit value is larger than the second determination limit value, the counting period is smaller than the longest separation time threshold value allowed by a clutch of the electric control silicone oil closed-loop clutch fan, if the maximum separation time threshold value is met, it is determined that the clutch of the electric control silicone oil closed-loop clutch fan is in a separation state for a preset duration, and the fan rotating speed is higher than the normal idle speed of the fan.
Optionally, the prompter includes a display device having a dashboard.
Based on the monitoring method and the monitoring device for the electric control silicone oil closed-loop clutch fan, which are provided by the embodiment of the invention, the fan rotating speed of the electric control silicone oil closed-loop clutch fan is obtained in real time; monitoring whether the rotating speed of the fan is in an abnormal state for a preset time, wherein the preset time is longer than the longest separation time threshold allowed by a clutch of the electric control silicone oil closed-loop clutch fan; and if so, generating fault information and prompting, wherein the fault information is used for indicating the fan of the electric control silicon oil closed-loop clutch to have the fault that the rotating speed of the fan is abnormally high. Therefore, in the scheme provided by the embodiment of the invention, the fan rotating speed of the electric control silicon oil closed-loop clutch fan obtained in real time is monitored, and when the fan rotating speed is monitored to be in an abnormal state for a duration of a preset time, fault information is generated and prompted, so that the purposes of real-time diagnosis and reminding of abnormal faults of the fan rotating speed are achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic flow chart of a monitoring method for an electronically controlled silicone oil closed-loop clutch fan according to an embodiment of the present invention;
fig. 2 is a logic diagram for determining whether the state of the fan of the electrically controlled silicone oil closed-loop clutch meets the set condition when the timing reaches the preset time according to the embodiment of the present invention;
fig. 3 is another logic diagram for determining whether the state of the fan of the electrically controlled silicone oil closed-loop clutch meets the set condition when the timing reaches the preset time according to the embodiment of the present invention;
FIG. 4 is a logic diagram illustrating whether the fan speed is in an abnormal state for a predetermined duration according to an embodiment of the present invention;
fig. 5 is a block diagram of a monitoring device of an electronically controlled silicone oil closed-loop clutch fan according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In this application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein.
Electric control silicone oil closed-loop clutch fan: the electric control silicone oil closed-loop clutch fan is different from the traditional bimetallic temperature-sensing control silicone oil clutch fan, the fan rotating speed sensor and the control electromagnetic valve are arranged on the electric control silicone oil closed-loop clutch fan, the ECU signal of an engine module is directly read, PID (proportion integration differentiation) regulation is carried out by the electromagnetic valve inside the clutch according to the information provided by the temperature sensors of all parts of the engine and the deviation between the fan rotating speed set by the ECU strategy and the actual fan rotating speed, and the rotating speed of the cooling fan is controlled, so that more accurate and rapid reaction is achieved. At present, the electric control silicone oil closed-loop clutch fan is widely applied to various medium and heavy commercial vehicles (except passenger cars matched with electronic fans).
The background art shows that when the electric control silicone oil closed-loop clutch fan has an abnormal fault that the clutch cannot be separated for a long time or the actual rotating speed of the electric control silicone oil closed-loop clutch fan is far higher than the normal idle speed even though the clutch is separated, the trouble that the water temperature is low and the oil consumption is increased is brought to the operation of the whole vehicle, but the existing technical means for diagnosing and reporting the abnormal fault does not exist, so that the abnormal fault cannot be checked in time. Therefore, the embodiment of the invention provides a monitoring method and a monitoring device for an electric control silicone oil closed-loop clutch fan, so as to realize the purpose of diagnosing and reminding abnormal faults of the electric control silicone oil closed-loop clutch fan.
Referring to fig. 1, a method for monitoring an electrically controlled silicone oil closed-loop clutch fan according to an embodiment of the present invention is provided. The monitoring method comprises the following steps:
s101: and acquiring the fan rotating speed of the electric control silicone oil closed-loop clutch fan in real time.
In S101, the fan speed refers to the actual fan speed of the electrically controlled silicone oil closed-loop clutch fan. Specifically, the actual rotating speed of the fan of the electric control silicone oil closed-loop clutch fan is obtained in real time.
In the process of specifically implementing S101, the actual fan speed of the electrically controlled silicone oil closed-loop clutch fan may be obtained in real time by a fan speed sensor of the electrically controlled silicone oil closed-loop clutch fan.
Optionally, the actual rotating speed of the fan of the electric control silicone oil closed-loop clutch fan can be obtained in real time by externally connecting the electric control silicone oil closed-loop clutch fan with a fan rotating speed sensor.
S102: and monitoring whether the rotating speed of the fan is in an abnormal state for a preset duration, if so, executing S103, otherwise, returning to the step of executing S102.
In S102, the preset duration is greater than the maximum allowable clutch disengagement time threshold of the electronically controlled silicone oil closed-loop clutch fan. That is, the fan speed is monitored, and when the fan speed lasts for a time longer than the longest separation time threshold allowed by the clutch of the electric control silicon oil closed-loop clutch fan, whether the fan speed is in an abnormal state or not is determined.
It should be noted that, if the hardware characteristics of the electric control silicone oil closed-loop clutch fan change or the faced technical conditions change, the setting of the maximum allowable disengagement time threshold of the clutch of the electric control silicone oil closed-loop clutch fan may also change accordingly. Correspondingly, the preset time length also changes along with the change of the longest separation time threshold value allowed by the clutch of the electric control silicon oil closed-loop clutch fan.
Optionally, the maximum allowable separation time threshold of the clutch of the electronically controlled silicone oil closed-loop clutch fan may be set or calibrated according to an empirical value.
In the process of implementing S102, the following various ways may be used to determine whether the fan speed is in the abnormal state for the preset time period.
Optionally, the first method is: and monitoring whether the clutch of the electric control silicon oil closed-loop clutch fan is not separated for a preset duration or not based on the rotating speed of the fan.
If not, determining that the rotating speed of the fan is in an abnormal state for a preset duration.
The second way is: whether a clutch of the electric control silicon oil closed-loop clutch fan is in a separation state for a preset duration or not is monitored based on the rotating speed of the fan, and the rotating speed of the fan is higher than the normal idle speed of the fan.
If yes, determining that the rotating speed of the fan is in an abnormal state for a preset duration.
S103: and generating and prompting fault information.
In S103, the fault information is used to indicate that the fan of the electronically controlled silicone oil closed-loop clutch has a fault that the fan speed is abnormally high.
In the process of implementing S103 specifically, there may be many schemes for prompting the fault information.
Optionally, the first scheme is: and prompting a user that the fan of the electric control silicon oil closed-loop clutch has a fault of abnormal high rotating speed of the fan through a flashing signal lamp.
The second scheme is as follows: the buzzer sends out buzzing sound to prompt a user that the fan of the electric control silicone oil closed-loop clutch has a fault that the rotating speed of the fan is abnormally high.
The third scheme is as follows: the buzzer sounds to prompt a user that the fan of the electric control silicone oil closed-loop clutch has a fault of abnormal high rotating speed of the fan while the signal lamp is flickered.
In addition, on the basis of the three schemes, the fault information can be displayed through the display equipment so as to be conveniently and visually checked by a user.
According to the monitoring method of the electric control silicone oil closed-loop clutch fan provided by the embodiment of the invention, the fan rotating speed of the electric control silicone oil closed-loop clutch fan obtained in real time is monitored, and when the fan rotating speed is monitored to be in an abnormal state for a duration of a preset time, fault information is generated and prompted, so that the purposes of real-time diagnosis and reminding of abnormal faults of the fan rotating speed are realized.
Whether the fan speed is in the abnormal state for the preset period of time may be determined in various ways based on the above-mentioned S102. Monitoring whether the clutch of the electric control silicon oil closed-loop clutch fan is not separated for a preset duration or not based on the rotating speed of the fan; if the fan speed is not separated, a first mode that the fan speed is in an abnormal state for a preset duration is determined, and detailed description is given. The method specifically comprises the following steps:
and starting timing, and judging whether the state of the electric control silicon oil closed-loop clutch fan meets the set condition when the timing reaches the preset time length. And if so, determining that the clutch of the electric control silicone oil closed-loop clutch fan is not separated for a preset duration. And if not, restarting timing, and judging whether the state of the electric control silicone oil closed-loop clutch fan meets the set conditions or not when the timing reaches the preset time.
The timing can be performed by using a device including, but not limited to, a timer.
Optionally, the timer may be used to start timing from zero until the timing time of the timer reaches the preset time length, or the timer may be used to start countdown from the preset time length until the timing time reaches the preset time length.
The setting conditions include: the method comprises the steps that an electromagnetic valve open-circuit fault error report does not occur to an electric control silicon oil closed-loop clutch fan, a first difference value between a set rotating speed of the fan and a rotating speed of an engine is smaller than a first judgment limit value, a second difference value between the rotating speed of the fan and the rotating speed of the engine is higher than a second judgment limit value, and the second judgment limit value is higher than the first judgment limit value.
The failure report of the open-circuit failure of the electromagnetic valve of the electric control silicon oil closed-loop clutch fan in the set condition refers to that PWM drives no-load failure.
The value range of the first determination limit value is as follows: -120rpm to-80 rpm. Preferably, the first determination limit may be taken to be-100 rpm.
The value range of the second determination limit value is as follows: -10rpm to 10 rpm. Preferably, the second determination limit value may be 0 rpm.
Optionally, after the start timing is executed, a specific process of determining whether the state of the electric control silicone oil closed-loop clutch fan meets a set condition when the timing reaches a preset time duration may be:
judging whether the timing reaches a preset time length, if not, executing a following cyclic judgment operation, if so, and the electric control silicone oil closed-loop clutch fan has no electromagnetic valve open-circuit fault error report, wherein a first difference value between the set rotating speed of the fan and the rotating speed of the engine is smaller than a first judgment limit value, a second difference value between the rotating speed of the fan and the rotating speed of the engine is higher than a second judgment limit value, the second judgment limit value is higher than the first judgment limit value, the state of the electric control silicone oil closed-loop clutch fan is determined to meet the set condition, and the following cyclic judgment operation is quitted.
The loop judgment operation includes A1-A3:
a1: judging whether the fan of the electric control silicone oil closed-loop clutch has an electromagnetic valve open-circuit fault and reports the fault, and if so, exiting the cycle judgment operation; if not, A2 is performed.
A2: judging whether a first difference value between the set rotating speed of the fan and the rotating speed of the engine is smaller than a first judgment limit value or not, and if not, exiting the cycle judgment operation; if so, perform A3.
A3: judging whether a second difference value between the rotating speed of the fan and the rotating speed of the engine is higher than a second judgment limit value or not, and if not, exiting the cycle judgment operation; if so, continuing to execute A1 until the timing reaches a preset time.
It should be noted that, the above-mentioned process is only a process of a cyclic judgment operation given by the embodiment of the present invention, and the above-mentioned respective judgment orders may be rearranged.
Optionally, after the start timing is executed, a specific process of determining whether the state of the electronically controlled silicone oil closed-loop clutch fan meets a set condition when the timing reaches a preset time duration may also be performed in parallel by using a logic determination diagram as shown in fig. 2:
the first condition is: and judging whether the fan of the electric control silicone oil closed-loop clutch has electromagnetic valve open-circuit fault and error reporting.
The second condition is: it is determined whether a first difference between the fan set speed and the engine speed is less than a first determination limit.
The third condition is: it is determined whether a second difference between the fan speed and the engine speed is higher than a second determination limit.
And if the result that the electromagnetic valve open-circuit fault of the electric control silicone oil closed-loop clutch fan is not reported, judging whether the timing reaches a preset time length or not after the result that the first difference between the set rotating speed of the fan and the rotating speed of the engine is smaller than a first judgment limit value and the second difference between the set rotating speed of the fan and the rotating speed of the engine is higher than a second judgment limit value is obtained, and if the result is not obtained, continuing to judge the three conditions. And if so, determining that the state of the electric control silicon oil closed-loop clutch fan meets the set conditions.
Whether the fan speed is in the abnormal state for the preset period of time may be determined in various ways based on the above-mentioned S102. Monitoring whether a clutch of the electric control silicon oil closed-loop clutch fan is in a separation state for a preset duration or not based on the rotating speed of the fan, wherein the rotating speed of the fan is higher than the normal idle speed of the fan; if yes, a second mode that the rotating speed of the fan is in an abnormal state for a preset duration is determined, and detailed description is given.
The method specifically comprises the following steps:
and starting timing, and judging whether the state of the electric control silicon oil closed-loop clutch fan meets the set condition when the timing reaches the preset time length. If the preset duration of the clutch of the electric control silicone oil closed-loop clutch fan is met, the clutch is determined to be in a separation state, and the rotating speed of the fan is higher than the normal idle speed of the fan. And if not, restarting timing, and judging whether the state of the electric control silicone oil closed-loop clutch fan meets the set conditions or not when the timing reaches the preset time.
The timing can be performed by using a device including, but not limited to, a timer.
Optionally, the timer may be used to start timing from zero until the timing time of the timer reaches the preset time length, or the timer may be used to start countdown from the preset time length until the timing time reaches the preset time length.
The setting conditions include: and a second difference value between the rotating speed of the fan and the rotating speed of the engine is smaller than or equal to a second judgment limit value, the set rotating speed of the fan is 0, and a third difference value between the average value of the rotating speeds of the fan in each counting period and the normal idle speed of the fan is higher than a third judgment limit value, wherein the third judgment limit value is larger than the second judgment limit value, and the counting period is smaller than the longest separation time threshold value allowed by a clutch of the electric control silicon oil closed-loop clutch fan.
Wherein, the value range of the second judgment limit value is as follows: -10rpm to 10 rpm. Preferably, the second determination limit value may be 0 rpm.
The value range of the third determination limit value is as follows: 130rpm to 170 rpm. Preferably, the third determination limit may be taken to be 150 rpm.
Optionally, after the start timing is executed, a specific process of determining whether the state of the electronically controlled silicone oil closed-loop clutch fan meets a set condition when the timing reaches a preset duration may be performed.
Judging whether the timing reaches a preset time length, if not, executing a following cycle judgment operation, if so, and a second difference value between the rotating speed of the fan and the rotating speed of the engine is less than or equal to a second judgment limit value, setting the rotating speed of the fan to be 0, and a third difference value between the average value of the rotating speeds of the fan in each counting period and the normal idle speed of the fan is higher than a third judgment limit value, wherein the third judgment limit value is larger than the second judgment limit value, the counting period is smaller than a maximum separation time threshold value allowed by a clutch of the electric control silicone oil closed-loop clutch fan, determining that the state of the electric control silicone oil closed-loop clutch fan meets the set condition, and simultaneously quitting the following cycle judgment operation.
The loop judgment operation includes B1-B3:
b1: judging whether a second difference value between the rotating speed of the fan and the rotating speed of the engine is smaller than or equal to a second judgment limit value or not, and if so, exiting the cycle judgment operation; if not, B2 is executed.
B2: judging whether the set rotating speed of the fan is 0 or not, and if not, exiting the circulation judgment operation; if 0, execute B3.
B3: judging whether a third difference value between the average value of the fan rotating speeds in each counting period and the normal idling speed of the fan is higher than a third judgment limit value or not, and if not, exiting the circulation judgment operation; if so, B1 is continuously executed until the preset time is reached.
It should be noted that, the above-mentioned process is only a process of a cyclic judgment operation given by the embodiment of the present invention, and the above-mentioned respective judgment orders may be rearranged.
Optionally, after the start timing is executed, a specific process of determining whether the state of the electronically controlled silicone oil closed-loop clutch fan meets a set condition when the timing reaches a preset time duration may also be performed in parallel by using a logic determination diagram as shown in fig. 3:
the first condition is: it is determined whether a second difference between the fan speed and the engine speed is less than or equal to a second determination limit.
The second condition is: and judging whether the set rotating speed of the fan is 0 or not.
The third condition is: and judging whether a third difference value between the average value of the fan rotating speeds in each counting period and the normal idling speed of the fan is higher than a third judgment limit value.
And after the result that a second difference value between the rotating speed of the fan and the rotating speed of the engine is smaller than or equal to a second judgment limit value, the set rotating speed of the fan is 0, and a third difference value between the average value of the rotating speeds of the fan in each counting period and the normal idle speed of the fan is higher than a third judgment limit value, wherein the third judgment limit value is larger than the second judgment limit value, and the counting period is smaller than the result of the longest separation time threshold value allowed by the clutch of the electric control silicone oil closed-loop clutch fan, judging whether the timing reaches a preset time length, and if not, continuing to judge the three conditions. And if so, determining that the state of the electric control silicon oil closed-loop clutch fan meets the set conditions.
In combination with the different logic determination diagrams provided in fig. 2 and fig. 3 for determining whether the fan speed is in the abnormal state for the preset duration, the embodiment of the present invention further discloses the logic determination diagram shown in fig. 4, and with reference to the description above with reference to fig. 2 and fig. 3, when the clutch of the electronically controlled silicone oil closed-loop clutch fan is not disengaged for the preset duration, or the clutch of the electronically controlled silicone oil closed-loop clutch fan is in the disengaged state for the preset duration, and the fan speed is higher than the normal idle speed of the fan, it can be determined that the fan speed is in the abnormal state for the preset duration.
Correspondingly, the embodiment of the invention also discloses a monitoring device of the electric control silicone oil closed-loop clutch fan. Fig. 5 is a block diagram of a monitoring device of an electrically controlled silicone oil closed-loop clutch fan according to an embodiment of the present invention.
The monitoring device includes: an electronic control unit ECU501 and a prompter 502.
The electronic control unit ECU501 is disposed inside the electrically controlled silicone oil closed-loop clutch fan.
The prompter 502 is externally connected with the outside of the electric control silicon oil closed-loop clutch fan.
The electronic control unit ECU501 is configured to: acquiring the fan rotating speed of an electric control silicone oil closed-loop clutch fan in real time, and monitoring whether the fan rotating speed is in an abnormal state for a preset duration, wherein the preset duration is greater than the longest separation time threshold allowed by a clutch of the electric control silicone oil closed-loop clutch fan; if so, a fault message is generated and sent to the prompter 502.
The prompter 502 is used to: and receiving fault information sent by the electronic control unit ECU501, and prompting the fault information, wherein the fault information is used for indicating that the fan of the electric control silicone oil closed-loop clutch has a fault that the rotating speed of the fan is abnormally high.
Optionally, the reminder 502 may include a display device having a dashboard. Specifically, the display device may display the fan speed of the electronically controlled silicone oil closed-loop clutch fan, which is obtained by the electronic control unit ECU501, through the instrument panel.
Optionally, the ECU501, which monitors whether the fan rotation speed is in an abnormal state for a preset duration, is specifically configured to: monitoring whether a clutch of the electric control silicone oil closed-loop clutch fan is not separated for a preset duration or not based on the rotating speed of the fan; if the fan is not separated, determining that the preset time of the rotating speed of the fan is in an abnormal state; or monitoring whether a clutch of the electric control silicone oil closed-loop clutch fan is in a separation state for a preset duration or not based on the rotating speed of the fan, wherein the rotating speed of the fan is higher than the normal idle speed of the fan; if yes, determining that the preset duration of the fan rotating speed is in an abnormal state.
Optionally, the electronic control unit ECU501, which monitors whether the clutch of the electronically controlled silicone oil closed-loop clutch fan is not disengaged for a preset duration based on the fan speed, is specifically configured to: and starting timing, and judging whether the state of the electric control silicon oil closed-loop clutch fan meets a set condition when the timing reaches a preset time length.
The setting conditions include: the method comprises the steps that an electromagnetic valve open-circuit fault error report does not occur to an electric control silicon oil closed-loop clutch fan, a first difference value between a set rotating speed of the fan and a rotating speed of an engine is smaller than a first judgment limit value, a second difference value between the rotating speed of the fan and the rotating speed of the engine is higher than a second judgment limit value, and the second judgment limit value is higher than the first judgment limit value; and if so, determining that the clutch of the electric control silicone oil closed-loop clutch fan is not separated for a preset duration.
Optionally, the electronic control unit ECU501, which monitors whether the clutch of the electronically controlled silicone oil closed-loop clutch fan is in a disengaged state for a preset duration based on the fan speed, and the fan speed is higher than the fan normal idle speed, is specifically configured to: and starting timing, and judging whether the state of the electric control silicon oil closed-loop clutch fan meets a set condition when the timing reaches a preset time length.
The setting conditions include: a second difference value between the rotating speed of the fan and the rotating speed of the engine is smaller than or equal to a second judgment limit value, the set rotating speed of the fan is 0, and a third difference value between the average value of the rotating speeds of the fan in each counting period and the normal idle speed of the fan is higher than a third judgment limit value, wherein the third judgment limit value is larger than the second judgment limit value, and the counting period is smaller than the longest separation time threshold value allowed by a clutch of the electric control silicon oil closed-loop clutch fan; if the preset duration of the clutch of the electric control silicone oil closed-loop clutch fan is met, the clutch is determined to be in a separation state, and the rotating speed of the fan is higher than the normal idle speed of the fan.
The specific implementation principles of the electronic control unit ECU and the prompter in the monitoring device for the electric control silicone oil closed-loop clutch fan disclosed in the embodiment of the present invention can be referred to the corresponding contents in the monitoring method for the electric control silicone oil closed-loop clutch fan disclosed in the embodiment of the present invention, and are not described herein again.
According to the monitoring device for the electric control silicone oil closed-loop clutch fan, provided by the embodiment of the invention, the electronic control unit ECU monitors the fan rotating speed of the electric control silicone oil closed-loop clutch fan which is obtained in real time, generates fault information and sends the fault information to the prompter when the fan rotating speed is monitored to be in an abnormal state for a continuous preset time, and the prompter prompts the fault information, so that the purpose of diagnosing and reminding the abnormal fault of the fan rotating speed in real time is realized.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A monitoring method of an electric control silicone oil closed-loop clutch fan is characterized by comprising the following steps:
acquiring the fan rotating speed of an electric control silicone oil closed-loop clutch fan in real time;
monitoring whether the rotating speed of the fan is in an abnormal high state for a preset time, wherein the preset time is longer than the longest separation time threshold allowed by a clutch of the electric control silicone oil closed-loop clutch fan;
and if so, generating fault information and prompting, wherein the fault information is used for indicating the fan of the electric control silicon oil closed-loop clutch to have the fault that the rotating speed of the fan is abnormally high.
2. The method of claim 1, wherein the monitoring whether the fan speed is in an abnormal state for a preset period of time comprises:
monitoring whether a clutch of the electric control silicone oil closed-loop clutch fan is not separated for a preset duration or not based on the rotating speed of the fan;
and if not, determining that the rotating speed of the fan is in an abnormal state for a preset duration.
3. The method of claim 2, wherein the monitoring whether the clutch of the electronically controlled silicone oil closed-loop clutch fan is not disengaged for a preset duration based on the fan speed comprises:
starting timing, and judging whether the state of the electric control silicon oil closed-loop clutch fan meets set conditions when the timing reaches the preset time length, wherein the set conditions comprise: the fan of the electric control silicone oil closed-loop clutch has no electromagnetic valve open-circuit fault, a first difference value between a set rotating speed of the fan and a rotating speed of an engine is smaller than a first judgment limit value, a second difference value between the rotating speed of the fan and the rotating speed of the engine is higher than a second judgment limit value, and the second judgment limit value is higher than the first judgment limit value;
and if so, determining that the clutch of the electric control silicone oil closed-loop clutch fan is not separated for a preset duration.
4. The method of claim 1, wherein the monitoring whether the fan speed is in an abnormal state for a preset period of time comprises:
monitoring whether a clutch of the electric control silicone oil closed-loop clutch fan is in a separation state for a preset duration or not based on the rotating speed of the fan, wherein the rotating speed of the fan is higher than the normal idle speed of the fan;
and if so, determining that the rotating speed of the fan is in an abnormal state for a preset duration.
5. The method of claim 4, wherein the monitoring whether a clutch of the electronically controlled silicone oil closed-loop clutch fan is disengaged for a preset duration based on the fan speed, and the fan speed being higher than a fan normal idle speed, comprises:
starting timing, and judging whether the state of the electric control silicon oil closed-loop clutch fan meets set conditions when the timing reaches the preset time length, wherein the set conditions comprise: a second difference value between the rotating speed of the fan and the rotating speed of the engine is smaller than or equal to a second judgment limit value, the set rotating speed of the fan is 0, and a third difference value between the average value of the rotating speeds of the fan in each counting period and the normal idle speed of the fan is higher than a third judgment limit value, wherein the third judgment limit value is larger than the second judgment limit value, and the counting period is smaller than the longest separation time threshold value allowed by a clutch of the electric control silicone oil closed-loop clutch fan;
and if so, determining that the clutch of the electric control silicon oil closed-loop clutch fan is in a separation state for a preset duration, and the rotating speed of the fan is higher than the normal idle speed of the fan.
6. A monitoring device of an electric control silicone oil closed-loop clutch fan is characterized by comprising an electronic control unit ECU arranged in the electric control silicone oil closed-loop clutch fan and a prompter externally connected to the outside of the electric control silicone oil closed-loop clutch fan;
the electronic control unit ECU is used for acquiring the fan rotating speed of the electric control silicone oil closed-loop clutch fan in real time, and monitoring whether the fan rotating speed is in an abnormal high state for a preset duration, wherein the preset duration is greater than the longest separation time threshold allowed by a clutch of the electric control silicone oil closed-loop clutch fan; if so, generating fault information and sending the fault information to a prompter;
and the prompter is used for prompting the fault information, and the fault information is used for indicating the fan of the electric control silicon oil closed-loop clutch to have the fault that the rotating speed of the fan is abnormally high.
7. The apparatus of claim 6, wherein the ECU, which monitors whether the fan speed is in an abnormal state for a preset duration, is specifically configured to:
monitoring whether a clutch of the electric control silicone oil closed-loop clutch fan is not separated for a preset duration or not based on the rotating speed of the fan; if the fan is not separated, determining that the preset duration of the rotating speed of the fan is in an abnormal state; or monitoring whether a clutch of the electric control silicone oil closed-loop clutch fan is in a separation state for a preset duration or not based on the rotating speed of the fan, wherein the rotating speed of the fan is higher than the normal idle speed of the fan; and if so, determining that the preset duration of the rotating speed of the fan is in an abnormal state.
8. The apparatus of claim 7, wherein the ECU, which monitors whether the clutch of the electronically controlled silicone oil closed-loop clutch fan is not disengaged for a preset duration based on the fan speed, is specifically configured to:
starting timing, and judging whether the state of the electric control silicon oil closed-loop clutch fan meets set conditions when the timing reaches the preset time length, wherein the set conditions comprise: the fan of the electric control silicone oil closed-loop clutch has no electromagnetic valve open-circuit fault, a first difference value between a set rotating speed of the fan and a rotating speed of an engine is smaller than a first judgment limit value, a second difference value between the rotating speed of the fan and the rotating speed of the engine is higher than a second judgment limit value, and the second judgment limit value is higher than the first judgment limit value; and if so, determining that the clutch of the electric control silicone oil closed-loop clutch fan is not separated for a preset duration.
9. The apparatus of claim 7, wherein the ECU, which monitors whether the clutch of the electrically controlled silicone oil closed-loop clutch fan is in a disengaged state for a preset duration based on the fan speed, and the fan speed is higher than the fan normal idle speed, is specifically configured to:
starting timing, and judging whether the state of the electric control silicon oil closed-loop clutch fan meets set conditions when the timing reaches the preset time length, wherein the set conditions comprise: and if the maximum separation time threshold value is met, the clutch of the electric control silicone oil closed-loop clutch fan is determined to be in a separation state for a preset duration, and the fan speed is higher than the normal idle speed of the fan.
10. The apparatus of any of claims 6 to 9, wherein the prompter comprises a display device having a dashboard.
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| CN202010640840.XA CN111749781B (en) | 2020-07-06 | 2020-07-06 | Method and device for monitoring electric control silicone oil closed-loop clutch fan |
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| CN112963237B (en) * | 2021-03-17 | 2022-04-26 | 潍柴动力股份有限公司 | Method, device and equipment for detecting running state of electric control silicone oil clutch |
| CN113586223B (en) * | 2021-08-27 | 2022-11-29 | 潍柴动力股份有限公司 | Rotating speed control method and device of electric control silicone oil fan and vehicle |
| CN113833557A (en) * | 2021-10-19 | 2021-12-24 | 湖南行必达网联科技有限公司 | Wireless power supply and signal transmission electric control silicone oil fan control system and method |
| CN114033545B (en) * | 2021-10-27 | 2022-10-11 | 昆山三一动力有限公司 | Control method and device of electric control silicone oil fan in idle speed mode |
| CN114320970B (en) * | 2021-12-31 | 2023-09-22 | 浪潮(北京)电子信息产业有限公司 | Fan abnormality early warning method, device, equipment and medium |
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| CN105190072B (en) * | 2013-03-14 | 2017-03-15 | 霍顿公司 | Viscous clutch and the method for operating viscous clutch |
| CN205840981U (en) * | 2016-07-14 | 2016-12-28 | 苏州睿昕汽车配件有限公司 | A kind of anti-inefficacy speed governing electric-control silicone oil fan clutch |
| CN207634167U (en) * | 2017-12-06 | 2018-07-20 | 东风商用车有限公司 | A kind of silicon oil filled fan clutch control system |
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