CN113606125B - Cooling water pump diagnosis method and device and electronic equipment - Google Patents
Cooling water pump diagnosis method and device and electronic equipment Download PDFInfo
- Publication number
- CN113606125B CN113606125B CN202110997756.8A CN202110997756A CN113606125B CN 113606125 B CN113606125 B CN 113606125B CN 202110997756 A CN202110997756 A CN 202110997756A CN 113606125 B CN113606125 B CN 113606125B
- Authority
- CN
- China
- Prior art keywords
- temperature
- water pump
- cooling water
- threshold
- fault
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
-
- 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
-
- 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
- F01P2025/00—Measuring
- F01P2025/08—Temperature
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The application discloses a cooling water pump diagnosis method, a device and electronic equipment, relates to the technical field of fault diagnosis, and the method is used for diagnosing a cooling water pump of a motor, and the motor, a radiator and the cooling water pump are sequentially connected to form a cooling circulation loop, and comprises the following steps: after the diagnosis entering condition of the cooling water pump is met, obtaining the required output of the cooling water pump; when the temperature sensor at the water outlet of the radiator has no fault and the duration time of the required output being greater than or equal to the first output threshold reaches the first time threshold, taking the water outlet temperature started by the duration time as a first initial temperature, and acquiring the water outlet temperature as a first judgment temperature until the difference value between the first initial temperature and the first judgment temperature is smaller than the first temperature threshold, judging that the cooling water pump has fault. According to the method and the device, the working state of the cooling water pump can be timely and accurately judged, meanwhile, the additional diagnostic interface is not needed to be added to the cooling water pump, the occupation of the pin resources of the controller is reduced, and the cost is reduced.
Description
Technical Field
The application relates to the technical field of fault diagnosis, in particular to a cooling water pump diagnosis method and device and electronic equipment.
Background
At present, in the working process of the motor controller system and the driving motor, more heat is generated due to winding loss, core loss, IGBT (Insulated Gate Bipolar Transistor ) module loss and the like, and if the heat is always gathered and cannot be dissipated, the temperature of the driving motor and the motor controller is increased. When the temperature rises to the maximum temperature value allowed by the material, the physical properties of the material of the driving motor are changed, so that the performance is deteriorated, and in addition, the insulating material of the driving motor also loses the insulating capability, so that the safety performance of a system is influenced; for the motor controller module, the temperature rise not only affects the working efficiency, but also shortens the service life and even burns out, so that the motor and the motor controller system cannot work.
The cooling liquid is used as a carrier for heat exchange in the motor cooling system, and can circularly flow in the motor cooling system so as to take away heat of the motor and the motor controller. The cooling water pump of motor provides power for the coolant, and the power of cooling water pump is bigger, then the flow of coolant also is bigger. Under the effect of a cooling water pump, cooling liquid with a large amount of heat enters from a water inlet of the radiator and flows out from a water outlet of the radiator, and in the process, the heat in the cooling liquid can be fully transferred to the air based on the flow guiding effect of a cooling fan of the radiator to the air, so that the temperature is reduced.
However, because the cooling fan and the cooling water pump are in independent electric control modes, once the cooling water pump does not work, heat of the motor and the motor controller cannot be taken away, and serious consequences are caused; in addition, the cooling fan still works at this time, so that energy consumption is wasted. Therefore, it is necessary to perform a failure diagnosis of the cooling water pump of the motor.
In the related art, when the cooling water pump performs fault diagnosis, in order to output the fault diagnosis, a circuit design is required to be changed, a diagnosis interface is required to be added, and a diagnosis output line is independently added to the controller, so that the working state of the cooling water pump is judged by utilizing the newly added diagnosis interface of the cooling water pump. Not only increases the complexity of the cooling water pump, but also increases the use cost.
Disclosure of Invention
Aiming at the defects in the prior art, the application aims to provide a cooling water pump diagnosis method, a cooling water pump diagnosis device and electronic equipment, so as to solve the problems of high complexity and high use cost of the cooling water pump in the related art.
The first aspect of the present application provides a cooling water pump diagnosis method for diagnosing a cooling water pump of a motor, wherein the motor, a radiator and the cooling water pump are sequentially connected to form a cooling circulation loop, and the method includes the steps of:
after the diagnosis entering condition of the cooling water pump is met, obtaining the required output of the cooling water pump;
when the temperature sensor at the water outlet of the radiator has no fault and the duration time of the required output being greater than or equal to the first output threshold reaches the first time threshold, taking the water outlet temperature started by the duration time as a first initial temperature, and acquiring the water outlet temperature as a first judgment temperature until the difference value between the first initial temperature and the first judgment temperature is smaller than the first temperature threshold, judging that the cooling water pump has fault.
In some embodiments, an all-in-one controller and a motor controller are further connected between the cooling water pump and the motor;
when the temperature sensor at the water outlet of the radiator has a fault and the duration time of the required output being greater than or equal to the first output threshold reaches a second time threshold, the motor temperature, the motor controller temperature and the all-in-one controller temperature which are started by the duration time are respectively used as a second initial temperature, a third initial temperature and a fourth initial temperature;
and acquiring the motor temperature, the motor controller temperature and the all-in-one controller temperature as a second judgment temperature, a third judgment temperature and a fourth judgment temperature respectively, and judging that the cooling water pump fails when the difference value between the second initial temperature and the second judgment temperature is smaller than a second temperature threshold value, the difference value between the third initial temperature and the third judgment temperature is smaller than a third temperature threshold value and the difference value between the fourth initial temperature and the fourth judgment temperature is smaller than a fourth temperature threshold value.
In some embodiments, before obtaining the second determination temperature, the third determination temperature, and the fourth determination temperature, further comprising:
pre-storing a corresponding table of minimum values of the environmental temperature, the vehicle speed and the motor temperature required to be reduced;
pre-storing a corresponding table of minimum values of the environmental temperature and the vehicle speed and the temperature of the motor controller to be reduced;
pre-storing a corresponding table of the minimum value required to be reduced by the environment temperature, the vehicle speed and the temperature of the all-in-one controller;
and acquiring the environment temperature and the vehicle speed, respectively looking up a table, and acquiring the minimum value of the motor temperature required to be reduced as a second temperature threshold, the minimum value of the motor controller temperature required to be reduced as a third temperature threshold and the minimum value of the all-in-one controller temperature required to be reduced as a fourth temperature threshold.
In some embodiments, after the obtaining the required output of the cooling water pump, the method further includes:
starting timing from the fact that the required output of the cooling water pump is greater than or equal to a first output threshold value;
and if the timing time does not reach the first time threshold, ending the timing if the required output is smaller than the first output threshold.
In some embodiments, the first time threshold is greater than the second time threshold.
In some embodiments, before obtaining the water outlet temperature as the first judgment temperature, the method further includes:
pre-storing a corresponding table of minimum values required to be reduced between the ambient temperature and the temperature of the water outlet of the radiator;
and acquiring the ambient temperature, and acquiring the minimum value of the drop required by the temperature of the water outlet of the radiator as the first temperature threshold value based on the ambient temperature lookup table.
In some embodiments, after judging the cooling water pump failure, further comprising:
continuously acquiring a first judgment temperature;
and when the difference value between the first initial temperature and the first judging temperature is larger than a first temperature threshold value, judging that the cooling water pump is in fault clearing.
In some embodiments, the diagnostic access condition is a first access condition or a second access condition;
the first entry condition includes:
receiving a refrigeration signal;
the cooling water pump has no electrical fault and the required output is greater than or equal to a first output threshold value;
the temperature sensor has no fault and the water outlet temperature is larger than a fifth temperature threshold value, or the temperature sensor has fault;
the fan at the radiator has no fault and the output duty ratio is larger than a second output threshold;
the liquid level of a liquid level sensor of a liquid supplementing box of the radiator is higher than a liquid level threshold value;
the second entry condition is:
the fault diagnosis forced start switch of the cooling water pump is set to be 1.
A second aspect of the present application provides a cooling water pump diagnostic apparatus based on the above method, which includes:
a first judging module for judging whether a diagnosis entry condition of the cooling water pump is satisfied;
the acquisition module is used for acquiring the required output of the cooling water pump when the diagnosis entry condition of the cooling water pump is met;
a second judging module for judging whether the temperature sensor is faulty;
and the diagnosis module is used for judging the cooling water pump fault when the temperature sensor at the water outlet of the radiator has no fault and the duration time of the required output being greater than or equal to the first output threshold reaches the first time threshold, taking the water outlet temperature started by the duration time as the first initial temperature and acquiring the water outlet temperature as the first judgment temperature until the difference value between the first initial temperature and the first judgment temperature is smaller than the first temperature threshold.
A third aspect of the present application provides an electronic device for cooling water pump diagnostics, comprising a processor and a memory, the processor executing code in the memory to implement the method described above.
The beneficial effects that technical scheme that this application provided brought include:
according to the cooling water pump diagnosis method, the cooling water pump diagnosis device and the electronic equipment, after the diagnosis entry condition of the cooling water pump is met, the required output of the cooling water pump is obtained, when a temperature sensor at the water outlet of the radiator has no fault and the duration time of the required output being greater than or equal to the first output threshold value reaches the first time threshold value, the water outlet temperature started by the duration time is taken as the first initial temperature, the water outlet temperature is taken as the first judgment temperature, and the cooling water pump fault is judged until the difference value between the first initial temperature and the first judgment temperature is smaller than the first temperature threshold value; otherwise, judging that the cooling water pump has no fault; therefore, the working state of the cooling water pump can be timely and accurately judged, unnecessary energy consumption waste of the fan during cooling water pump faults is avoided, and meanwhile, a diagnosis interface is not required to be additionally added to the cooling water pump, so that the occupation of the pin resources of the controller is reduced, and the cost is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a first flowchart of a cooling water pump diagnostic method in an embodiment of the present application.
FIG. 2 is a schematic diagram of a motor cooling system in an embodiment of the present application;
FIG. 3 is a second flowchart of a cooling water pump diagnostic method in an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present invention will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The embodiment of the application provides a cooling water pump diagnosis method which can solve the problems of high complexity and high use cost of a cooling water pump in the related technology.
The cooling water pump diagnosis method is used for diagnosing the cooling water pump of the motor. In the embodiment, the motor, the radiator and the cooling water pump are sequentially connected to form a cooling circulation loop, and a temperature sensor is further arranged at the water outlet of the radiator. The radiator is also provided with a fan for realizing air diversion.
As shown in fig. 1, the cooling water pump diagnosis method of the present embodiment specifically includes the following steps:
s1, after the diagnosis entering condition of the cooling water pump is met, the required output of the cooling water pump is obtained.
S2, when the temperature sensor at the water outlet of the radiator has no fault and the duration time of the required output being greater than or equal to the first output threshold reaches the first time threshold, taking the water outlet temperature started by the duration time as a first initial temperature, and acquiring the water outlet temperature as a first judgment temperature until the difference value between the first initial temperature and the first judgment temperature is smaller than the first temperature threshold, judging that the cooling water pump has fault.
And if the difference value between the first initial temperature and the first judging temperature is larger than or equal to a first temperature threshold value, judging that the cooling water pump has no fault.
According to the cooling water pump diagnosis method, after the diagnosis entry condition of the cooling water pump is met, the required output of the cooling water pump is obtained, when a temperature sensor at the water outlet of the radiator has no fault and the duration time of the required output being greater than or equal to the first output threshold value reaches the first time threshold value, the water outlet temperature started by the duration time is taken as the first initial temperature, the water outlet temperature is taken as the first judgment temperature, and the cooling water pump is judged to be faulty until the difference value between the first initial temperature and the first judgment temperature is smaller than the first temperature threshold value; otherwise, judging that the cooling water pump has no fault; therefore, the working state of the cooling water pump can be timely and accurately judged, unnecessary energy consumption waste of the fan during cooling water pump faults is avoided, and meanwhile, a diagnosis interface is not required to be additionally added to the cooling water pump, so that the occupation of the pin resources of the controller is reduced, and the cost is reduced.
As shown in fig. 2, an all-in-one controller and a motor controller are further connected between the cooling water pump and the motor to form a motor cooling system. In this embodiment, the radiator is further connected to a fluid infusion tank, and a liquid level sensor is disposed in the fluid infusion tank. The cooling liquid sequentially passes through the cooling water pump, the all-in-one controller, the motor controller and the motor from the water outlet of the radiator, and then returns to the radiator through the water inlet of the radiator.
As shown in fig. 3, in this embodiment, the method further includes the steps of:
s3, when the temperature sensor at the water outlet of the radiator has a fault, and the duration time when the required output of the cooling water pump is larger than or equal to the first output threshold value reaches the second time threshold value, the motor temperature, the motor controller temperature and the all-in-one controller temperature started by the duration time are respectively used as a second initial temperature, a third initial temperature and a fourth initial temperature. That is, the motor temperature at the beginning of the duration is taken as the second initial temperature, the motor controller temperature at the beginning of the duration is taken as the third initial temperature, and the all-in-one controller temperature at the beginning of the duration is taken as the fourth initial temperature.
S4, acquiring the motor temperature, the motor controller temperature and the all-in-one controller temperature as a second judgment temperature, a third judgment temperature and a fourth judgment temperature respectively, and judging that the cooling water pump fails when the difference value between the second initial temperature and the second judgment temperature is smaller than a second temperature threshold value, the difference value between the third initial temperature and the third judgment temperature is smaller than a third temperature threshold value and the difference value between the fourth initial temperature and the fourth judgment temperature is smaller than a fourth temperature threshold value.
And if the difference value between the second initial temperature and the second judgment temperature is not smaller than the second temperature threshold value, or the difference value between the third initial temperature and the third judgment temperature is not smaller than the third temperature threshold value, or the difference value between the fourth initial temperature and the fourth judgment temperature is not smaller than the fourth temperature threshold value, judging that the cooling water pump has no fault.
The diagnosis method of the embodiment judges whether the cooling water pump works abnormally or not based on the temperature signal of the motor cooling system; when the required output of the cooling water pump is greater than or equal to a first output threshold value, if the temperature sensor at the water outlet of the radiator has no fault, judging whether the cooling water pump has a fault according to the water outlet temperature detected by the water outlet temperature sensor; if the temperature sensor at the water outlet of the radiator has faults, judging whether the cooling water pump has faults or not according to the temperature of the motor, the temperature of the motor controller and the temperature of the all-in-one controller.
Further, before the motor temperature, the motor controller temperature, and the all-in-one controller temperature are respectively obtained as the second judgment temperature, the third judgment temperature, and the fourth judgment temperature, the method further comprises the following steps:
firstly, pre-storing a corresponding table of minimum values of the environmental temperature, the vehicle speed and the motor temperature required to be reduced;
secondly, pre-storing a corresponding table of minimum values of the environmental temperature and the vehicle speed and the temperature of the motor controller to be reduced;
then, pre-storing a corresponding table of the minimum value required to be reduced by the environment temperature, the vehicle speed and the all-in-one controller temperature;
finally, acquiring the environment temperature and the vehicle speed, respectively looking up a table, and acquiring the minimum value of the motor temperature required to be reduced as a second temperature threshold, the minimum value of the motor controller temperature required to be reduced as a third temperature threshold and the minimum value of the all-in-one controller temperature required to be reduced as a fourth temperature threshold. That is, the second temperature threshold is the minimum value of the motor temperature drop required at the current ambient temperature and vehicle speed; the third temperature threshold is the minimum value of the temperature of the motor controller required to be reduced under the current environment temperature and the vehicle speed; the fourth temperature threshold is the minimum value of the drop required by the all-in-one controller temperature at the current ambient temperature and vehicle speed.
On the basis of the above embodiment, in this embodiment, after the above-mentioned obtaining the required output of the cooling water pump, the method further includes the following steps:
firstly, timing is started from the condition that the required output of the cooling water pump is larger than or equal to a first output threshold value.
And then, when the temperature sensor at the water outlet of the radiator has no fault, if the timing time does not reach the first time threshold, the required output is smaller than the first output threshold, namely, the duration time of the required output larger than or equal to the first output threshold does not reach the first time threshold, the timing is ended, and whether the diagnosis entry condition of the cooling water pump is met is judged again.
Optionally, when the counted time reaches the first time threshold, the water outlet temperature started by counting is taken as the first initial temperature T coolt After the timing time reaches the first time threshold, only the first initial temperature T is needed coolt And comparing the obtained water outlet temperature with the current water outlet temperature.
Further, when the temperature sensor at the water outlet of the radiator has a fault, if the timing time does not reach the second time threshold, the required output is smaller than the first output threshold, that is, the duration time of the required output being greater than or equal to the first output threshold does not reach the second time threshold, the timing is ended, and whether the diagnosis entry condition of the cooling water pump is met is judged again.
Optionally, when the counted time reaches the second time threshold, the motor temperature at the beginning of counting is taken as the second initial temperature T Mot The motor temperature started by timing is taken as a third initial temperature T Mcu The motor temperature started by timing is taken as a fourth initial temperature T PDU . After the timing time reaches the second time threshold, only the second initial temperature T is needed Mot Third initial temperature T Mcu Fourth initial temperature T PDU And respectively comparing the temperature with the temperature of the motor, the temperature of the motor controller and the temperature of the all-in-one controller which are acquired at present one by one.
In addition, whether the temperature sensor at the water outlet of the radiator fails or not, after the diagnosis entry condition of the cooling water pump is met and the diagnosis is entered, when the required output of the cooling water pump is smaller than the first output threshold, the diagnosis is ended, and whether the diagnosis entry condition of the cooling water pump is met or not needs to be judged again.
Preferably, the first time threshold is greater than the second time threshold. Alternatively, the first time threshold may be set according to the time required for the coolant temperature to change significantly under normal conditions; the second time threshold may be set based on the time required for the motor temperature, the motor controller temperature, and the three-in-one controller temperature to change significantly under normal conditions, while the time required for the coolant temperature to change significantly is significantly longer than the time required for the motor temperature, the motor controller temperature, and the three-in-one controller temperature to change significantly.
On the basis of the above embodiment, in the present embodiment, before the water outlet temperature is obtained as the first judgment temperature in the step S2, the method further includes the following steps:
firstly, pre-storing a corresponding table of minimum values required to be reduced between the ambient temperature and the temperature of a water outlet of a radiator;
and then, acquiring the ambient temperature, and acquiring the minimum value of the temperature required to be reduced of the water outlet of the radiator as the first temperature threshold value based on the ambient temperature lookup table. That is, the first temperature threshold is the minimum value of the drop required in the coolant temperature at the current ambient temperature.
Preferably, after the cooling water pump failure determination in the step S2, the method further includes the following steps:
first, the first judgment temperature is continuously obtained, and the difference value between the first initial temperature and the first judgment temperature is calculated.
And then, judging that the cooling water pump is in fault clearing when the difference value between the first initial temperature and the first judging temperature is larger than a first temperature threshold value.
In other embodiments, a third time threshold may also be set, and the third time threshold is less than the first time threshold, or much less than the first time threshold. And if the duration that the difference between the first initial temperature and the first judgment temperature is larger than the first temperature threshold reaches a third time threshold, judging that the cooling water pump is in fault clearance so as to further ensure that the cooling water pump is in fault clearance.
Correspondingly, after the temperature sensor at the water outlet of the radiator fails, judging that the cooling water pump fails, and further comprising the following steps:
firstly, continuously acquiring a second judgment temperature, a third judgment temperature and a fourth judgment temperature, and calculating a difference value between the second initial temperature and the second judgment temperature, a difference value between the third initial temperature and the third judgment temperature and a difference value between the fourth initial temperature and the fourth judgment temperature.
And then, judging that the cooling water pump fault is cleared when the difference between the second initial temperature and the second judging temperature is larger than a second temperature threshold value, or the difference between the third initial temperature and the third judging temperature is larger than a third temperature threshold value, or the difference between the fourth initial temperature and the fourth judging temperature is larger than a fourth temperature threshold value.
In this embodiment, the above-mentioned diagnosis entry condition is a first entry condition or a second entry condition, and when one of the first entry condition or the second entry condition is satisfied, the diagnosis of the cooling water pump can be performed.
The first entry condition includes:
receiving a refrigeration signal; namely, the motor cooling system receives a refrigeration signal and needs refrigeration;
the cooling water pump has no electrical fault and the required output is greater than or equal to a first output threshold value;
the temperature sensor has no fault, the temperature of the water outlet is larger than a fifth temperature threshold value, or the temperature sensor has fault, and the output is 1 when the fault occurs;
the fan at the radiator has no fault and the output duty ratio is larger than a second output threshold;
the liquid level of the liquid level sensor of the liquid supplementing box of the radiator is higher than a liquid level threshold value.
Preferably, the first output threshold is set according to a technical specification of the cooling water pump. In this embodiment, the judgment is performed with the output duty ratio, and when the cooling water pump has no electrical fault and the duty ratio output is greater than or equal to 23%, the water pump will only work, and the first output threshold at this time may be set to 23%.
In other embodiments, if the cooling water pump is a switch-type water pump, 0 indicates no output, 1 indicates output, and the cooling water pump is operated only when no electrical fault occurs and the required output is equal to 1, and is one of the first entry conditions for diagnosis.
Optionally, the fifth temperature threshold is used for diagnosing and judging the starting condition of the cooling water pump, and can be obtained by looking up a table according to the current ambient temperature. In this embodiment, the fifth temperature threshold is a minimum value of the temperature required to be detected by the temperature sensor under the current ambient temperature, so as to determine that the cooling water pump needs to be started for diagnosis.
Alternatively, the second output threshold may be set according to specifications of the radiator and the fan.
In this embodiment, the liquid level threshold may be set according to the technical specification of the liquid replenishing tank.
The second entry condition is:
the fault diagnosis forced start switch of the cooling water pump is set to be 1.
The embodiment of the application also provides a cooling water pump diagnosis device based on the method, which comprises a first judgment module, an acquisition module, a second judgment module and a diagnosis module.
The first judging module is used for judging whether the diagnosis entering condition of the cooling water pump is met.
The acquisition module is used for acquiring the required output of the cooling water pump when the diagnosis entry condition of the cooling water pump is met.
The second judging module is used for judging whether the temperature sensor fails.
And the diagnosis module is used for judging the cooling water pump fault when the temperature sensor at the water outlet of the radiator has no fault and the duration time of the required output being greater than or equal to the first output threshold reaches the first time threshold, taking the water outlet temperature started by the duration time as a first initial temperature and acquiring the water outlet temperature as a first judgment temperature until the difference value between the first initial temperature and the first judgment temperature is smaller than the first temperature threshold.
Further, the above-mentioned diagnostic module is further configured to, when the temperature sensor has a fault and the duration of the required output greater than or equal to the first output threshold reaches the second time threshold, respectively, use the motor temperature, the motor controller temperature, and the all-in-one controller temperature, which are started with the duration, as the second initial temperature, the third initial temperature, and the fourth initial temperature; and acquiring the motor temperature, the motor controller temperature and the all-in-one controller temperature as a second judgment temperature, a third judgment temperature and a fourth judgment temperature respectively, and judging that the cooling water pump fails when the difference between the second initial temperature and the second judgment temperature is smaller than a second temperature threshold value, the difference between the third initial temperature and the third judgment temperature is smaller than a third temperature threshold value and the difference between the fourth initial temperature and the fourth judgment temperature is smaller than a fourth temperature threshold value.
The cooling water pump diagnosis device is suitable for the above-mentioned every cooling water pump diagnosis method, can diagnose when there is a fault in the temperature sensor of radiator delivery port department, and need not to increase the diagnosis physical interface of cooling water pump additionally, can effectively judge whether cooling water pump work normally, and has increased diagnosis rationality, can also inform the motor regulation in advance to protection motor and motor controller.
The embodiment of the application also provides an electronic device for diagnosing the cooling water pump, the electronic device comprises a processor and a memory, and the processor executes codes in the memory to realize the following cooling water pump diagnosis method:
when the diagnosis entering condition of the cooling water pump is met, obtaining the required output of the cooling water pump;
starting timing from the fact that the required output of the cooling water pump is greater than or equal to a first output threshold value;
if the temperature sensor at the water outlet of the radiator has no fault, taking the water outlet temperature at the beginning of timing as a first initial temperature, acquiring the water outlet temperature as a first judgment temperature after the timing time reaches a first time threshold, and judging that the cooling water pump has fault when the difference value between the first initial temperature and the first judgment temperature is smaller than the first temperature threshold.
Optionally, the processor executing the code in the memory may further implement a cooling water pump diagnostic method as follows:
if the temperature sensor at the water outlet of the radiator has a fault, the motor temperature, the motor controller temperature and the all-in-one controller temperature at the beginning of timing are respectively used as a second initial temperature, a third initial temperature and a fourth initial temperature;
and after the timing time reaches a second time threshold, acquiring the motor temperature, the motor controller temperature and the all-in-one controller temperature as a second judgment temperature, a third judgment temperature and a fourth judgment temperature respectively, and judging that the cooling water pump fails when the difference value between the second initial temperature and the second judgment temperature is smaller than the second temperature threshold, the difference value between the third initial temperature and the third judgment temperature is smaller than the third temperature threshold and the difference value between the fourth initial temperature and the fourth judgment temperature is smaller than the fourth temperature threshold.
Preferably, the execution of the code in the memory by the processor may also implement other steps in the cooling water pump diagnostic method described above.
In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of description of the present application and simplification of the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
It should be noted that in this application, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, 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 one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.
The foregoing is merely a specific embodiment of the application to enable one skilled in the art to understand or practice the application. 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 application. Thus, the present application 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 (9)
1. The cooling water pump diagnosis method is used for diagnosing the cooling water pump of the motor, and the motor, the radiator and the cooling water pump are sequentially connected to form a cooling circulation loop, and is characterized by comprising the following steps:
after the diagnosis entering condition of the cooling water pump is met, obtaining the required output of the cooling water pump;
when the temperature sensor at the water outlet of the radiator has no fault and the duration time of the required output being greater than or equal to the first output threshold reaches a first time threshold, taking the water outlet temperature started by the duration time as a first initial temperature, and acquiring the water outlet temperature as a first judgment temperature until the difference value between the first initial temperature and the first judgment temperature is smaller than the first temperature threshold, judging that the cooling water pump has fault;
an all-in-one controller and a motor controller are also connected between the cooling water pump and the motor;
when a temperature sensor at a water outlet of the radiator has a fault and the duration time of the required output being greater than or equal to the first output threshold value reaches a second time threshold value, the motor temperature, the motor controller temperature and the all-in-one controller temperature which are started by the duration time are respectively used as a second initial temperature, a third initial temperature and a fourth initial temperature;
and acquiring the motor temperature, the motor controller temperature and the all-in-one controller temperature as a second judgment temperature, a third judgment temperature and a fourth judgment temperature respectively, and judging that the cooling water pump fails when the difference value between the second initial temperature and the second judgment temperature is smaller than a second temperature threshold value, the difference value between the third initial temperature and the third judgment temperature is smaller than a third temperature threshold value and the difference value between the fourth initial temperature and the fourth judgment temperature is smaller than a fourth temperature threshold value.
2. The cooling water pump diagnostic method as set forth in claim 1, wherein before the second determination temperature, the third determination temperature, and the fourth determination temperature are obtained, further comprising:
pre-storing a corresponding table of minimum values of the environmental temperature, the vehicle speed and the motor temperature required to be reduced;
pre-storing a corresponding table of minimum values of the environmental temperature and the vehicle speed and the temperature of the motor controller to be reduced;
pre-storing a corresponding table of the minimum value required to be reduced by the environment temperature, the vehicle speed and the temperature of the all-in-one controller;
and acquiring the environment temperature and the vehicle speed, respectively looking up a table, and acquiring the minimum value of the motor temperature required to be reduced as a second temperature threshold, the minimum value of the motor controller temperature required to be reduced as a third temperature threshold and the minimum value of the all-in-one controller temperature required to be reduced as a fourth temperature threshold.
3. The cooling water pump diagnostic method as set forth in claim 1, further comprising, after said obtaining a required output of the cooling water pump:
starting timing from the required output of the cooling water pump being greater than or equal to a first output threshold;
and if the timing time does not reach the first time threshold, ending the timing if the required output is smaller than the first output threshold.
4. The cooling water pump diagnostic method as set forth in claim 1, wherein: the first time threshold is greater than the second time threshold.
5. The cooling water pump diagnosis method according to claim 1, further comprising, before acquiring the water outlet temperature as the first determination temperature:
pre-storing a corresponding table of minimum values required to be reduced between the ambient temperature and the temperature of the water outlet of the radiator;
and acquiring the ambient temperature, and acquiring the minimum value of the temperature required to be reduced of the water outlet of the radiator as the first temperature threshold value based on the ambient temperature lookup table.
6. The cooling water pump diagnosis method according to claim 1, further comprising, after judging that the cooling water pump is malfunctioning:
continuously acquiring a first judgment temperature;
and judging that the cooling water pump fault is cleared when the difference value between the first initial temperature and the first judging temperature is larger than a first temperature threshold value.
7. The cooling water pump diagnostic method as set forth in claim 1, wherein the diagnostic entry condition is a first entry condition or a second entry condition;
the first entry condition includes:
receiving a refrigeration signal;
the cooling water pump has no electrical fault and the required output is greater than or equal to a first output threshold value;
the temperature sensor is fault-free and the temperature of the water outlet is greater than a fifth temperature threshold, or the temperature sensor is fault;
the fan at the radiator has no fault and the output duty ratio is larger than a second output threshold;
the liquid level of a liquid level sensor of a liquid supplementing box of the radiator is higher than a liquid level threshold value;
the second entry condition is:
the fault diagnosis forced start switch of the cooling water pump is set to be 1.
8. A cooling water pump diagnostic apparatus based on the method of claim 1, characterized by comprising:
a first judging module for judging whether a diagnosis entry condition of the cooling water pump is satisfied;
the acquisition module is used for acquiring the required output of the cooling water pump when the diagnosis entry condition of the cooling water pump is met;
a second judging module for judging whether the temperature sensor is faulty;
and the diagnosis module is used for taking the water outlet temperature started by the duration as a first initial temperature and acquiring the water outlet temperature as a first judgment temperature when the temperature sensor at the water outlet of the radiator has no fault and the duration time of the required output being larger than or equal to the first output threshold value reaches a first time threshold value, and judging that the cooling water pump has fault until the difference value between the first initial temperature and the first judgment temperature is smaller than the first temperature threshold value.
9. An electronic device for cooling water pump diagnostics, comprising a processor and a memory, the processor executing code in the memory to implement the method of any of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110997756.8A CN113606125B (en) | 2021-08-27 | 2021-08-27 | Cooling water pump diagnosis method and device and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110997756.8A CN113606125B (en) | 2021-08-27 | 2021-08-27 | Cooling water pump diagnosis method and device and electronic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113606125A CN113606125A (en) | 2021-11-05 |
| CN113606125B true CN113606125B (en) | 2023-07-07 |
Family
ID=78309582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110997756.8A Active CN113606125B (en) | 2021-08-27 | 2021-08-27 | Cooling water pump diagnosis method and device and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113606125B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115328234B (en) * | 2022-09-16 | 2023-10-24 | 中国第一汽车股份有限公司 | Method and device for diagnosing cooling capacity of motor cooling system, processor and vehicle |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4434199B2 (en) * | 2006-12-14 | 2010-03-17 | トヨタ自動車株式会社 | Cooling device for electric equipment, cooling method, program for causing computer to realize cooling method, and recording medium recording the program |
| JP2010065671A (en) * | 2008-09-15 | 2010-03-25 | Denso Corp | Failure diagnosis device of cooling system for vehicle |
| US8813693B2 (en) * | 2011-10-07 | 2014-08-26 | GM Global Technology Operations LLC | Diagnostic system and method for a switchable water pump |
| CN104808719B (en) * | 2015-03-12 | 2017-09-22 | 北京长安汽车工程技术研究有限责任公司 | A kind of temperature control system and method |
| CN110067633B (en) * | 2017-02-20 | 2020-08-04 | 广州汽车集团股份有限公司 | Control method of electronic water pump of engine |
| CN108507763B (en) * | 2017-02-28 | 2020-04-07 | 联合汽车电子有限公司 | Thermostat fault active diagnosis method and system |
| CN111963298B (en) * | 2020-08-25 | 2021-12-21 | 潍柴动力股份有限公司 | Electromagnetic clutch water pump fault detection method and device, controller and vehicle |
| CN112874385B (en) * | 2021-02-19 | 2022-11-15 | 北京车和家信息技术有限公司 | Thermal management system diagnosis method and device, thermal management control system and vehicle |
-
2021
- 2021-08-27 CN CN202110997756.8A patent/CN113606125B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113606125A (en) | 2021-11-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2323509C1 (en) | Power supply | |
| US20130030643A1 (en) | Cooling system for vehicle | |
| CN107804157B (en) | Cooling device for vehicle | |
| CN108448200B (en) | Cooling method and system of power supply system | |
| CN109975711A (en) | Battery failure detection method and device | |
| CN108060968B (en) | Cooling device for vehicle | |
| CN113606125B (en) | Cooling water pump diagnosis method and device and electronic equipment | |
| CN113329905B (en) | Method for diagnosing the efficiency of a battery cooling circuit | |
| CN106329028A (en) | Vehicle battery temperature control device and vehicle battery temperature control method | |
| KR102031368B1 (en) | Fault diagnosis device and method for the cooling system of construction machinery | |
| CN111554954A (en) | Fuel cell cold start assembly, vehicle and control method | |
| CN110943240A (en) | Hydrogen engine thermal management system adopting double-circulation water pump and control method | |
| KR20180134189A (en) | Plug-in vehicle and method of controlling thereof | |
| CN111413116B (en) | Motor controller cooling fault detection system and method thereof | |
| JP2005248730A (en) | Electric compressor | |
| CN112018957A (en) | Two-wheeled electric vehicle motor cooling system and two-wheeled electric vehicle | |
| CN113241488B (en) | Cooling liquid pump assembly for power battery thermal management system and control method thereof | |
| CN115911453A (en) | Insulation resistance value control method and device for fuel cell vehicle, vehicle and medium | |
| CN111474971B (en) | Control method for preventing excessive low water flow and water supply machine | |
| CN114039072A (en) | Insulation control method, module and system and fuel cell thermal management system | |
| KR101734577B1 (en) | Electric Vehicle Cooling System and Operation Method thereof | |
| CN214822581U (en) | Pure electric vehicles cooling system and pure electric vehicles | |
| CN210949807U (en) | Vehicle cooling system | |
| CN114439737B (en) | Water pump control method, device, storage medium, liquid cooling unit and refrigerating system | |
| CN110686546B (en) | Control method of electric assembly heat exchange system, electric assembly heat exchange system and vehicle |
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 |