CN109297618A - A kind of method and device detecting insincere property - Google Patents
A kind of method and device detecting insincere property Download PDFInfo
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- CN109297618A CN109297618A CN201811155808.1A CN201811155808A CN109297618A CN 109297618 A CN109297618 A CN 109297618A CN 201811155808 A CN201811155808 A CN 201811155808A CN 109297618 A CN109297618 A CN 109297618A
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- temperature
- pump
- difference
- insincere
- heter
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K15/00—Testing or calibrating of thermometers
- G01K15/007—Testing
Abstract
The invention discloses a kind of method and device for detecting insincere property, this method includes obtaining the pump temperature pumped under current state and pump heter temperature；It pumps heater and preset time is heated with default duty ratio；Pump temperature and pump heter temperature after obtaining heating preset time；Calculate the first temperature difference of pump temperature and the pump temperature under current state after heating preset time；The first temperature difference is judged whether in first threshold, if then pump temperature sensor is insincere；The second temperature for calculating pump heter temperature and the pump heter temperature under current state after heating preset time is poor；Second temperature difference is judged whether in second threshold, if it is insincere then to pump heater temperature sensor.Pump temperature sensor is capable of detecting when by using method of the invention and pumps the insincere failure of heater temperature sensor, makees place mat row for subsequent maintenance, so as to guarantee that engine operates normally.
Description
Technical field
The present invention relates to urea pump technical fields, more specifically to a kind of method and device for detecting insincere property.
Background technique
Engine operation process, urea pump temperature need the work all to its as the key parameter for influencing after-treatment system
Make to be detected under state, still, pump temperature sensor and detection pump for detecting pump temperature when urea goes out pump heat
The pump heater temperature sensor longtime running of device temperature will appear insincere failure, it will influence the working condition of engine
Normal detection, to influence the normal operation of engine.
Summary of the invention
In view of this, the technical problem to be solved by the present invention is to how guarantee that engine operates normally, for this purpose, of the invention
Provide a kind of method and device for detecting insincere property.
To achieve the above object, the invention provides the following technical scheme:
A method of detecting insincere property, comprising:
Obtain the pump temperature pumped under current state and pump heter temperature；
It pumps heater and preset time is heated with default duty ratio；
Pump temperature and pump heter temperature after obtaining heating preset time；
Calculate the first temperature difference of pump temperature and the pump temperature under current state after heating preset time；
The first temperature difference is judged whether in first threshold, if then pump temperature sensor is insincere；
The second temperature for calculating pump heter temperature and the pump heter temperature under current state after heating preset time is poor；
Second temperature difference is judged whether in second threshold, if it is insincere then to pump heater temperature sensor.
In one embodiment of the invention, further includes:
Calculate the third temperature difference that heter temperature and pump temperature are pumped after heating preset time；
Third temperature difference is judged whether in third threshold value, then pump temperature sensor and pump heater temperature sensor can not
Letter.
In one embodiment of the invention, the method also includes: determine current state be cold state.
In one embodiment of the invention, the determining current state includes: for cold state
Obtain the coolant temperature for pumping the coolant liquid in locating system and the environment temperature for pumping local environment；
Calculate the absolute value of the difference of the coolant temperature Yu the environment temperature；
Judge the absolute value of the difference of the coolant temperature and the environment temperature whether in the 4th threshold value, if then when
Preceding state is cold state.
In one embodiment of the invention, further includes:
Calculate the absolute value of the difference of pump temperature and environment temperature under cold state；
Judge that the absolute value of the difference of pump temperature and environment temperature is whether in the 5th threshold value under cold state, if then pumping temperature
It is insincere to spend sensor.
In one embodiment of the invention, further includes:
Calculate the absolute value of the difference that heter temperature and environment temperature are pumped under cold state；
Judge that the absolute value of the difference of pump heter temperature and environment temperature is whether in the 6th threshold value under cold state, if
It is insincere then to pump heater temperature sensor.
The invention also discloses a kind of devices for detecting insincere property, comprising:
Obtain the pump temperature sensor of the pump temperature of pump；
Obtain the pump heater temperature sensor of pump heter temperature；
With the pump heater of default empty accounting heat pump preset time；
Calculate the first temperature difference of pump temperature and the pump temperature under current state after heating preset time first calculates list
Member；
The first temperature difference is judged whether in first threshold, if then incredible first judgement of pump temperature sensor is single
Member；
The second temperature for calculating pump heter temperature and the pump heter temperature under current state after heating preset time is poor
The second computing unit；And
Judge that second temperature difference whether in second threshold, is sentenced if then pumping heater temperature sensor incredible second
Disconnected unit.
In one embodiment of the invention, further includes:
Calculate the third computing unit that the third temperature difference of heter temperature and pump temperature is pumped after heating preset time；And
Third temperature difference is judged whether in third threshold value, then pump temperature sensor and pump heater temperature sensor can not
The third judging unit of letter.
In one embodiment of the invention, described device further include: determine that current state is cold state order really
Member.
In one embodiment of the invention, the determination unit includes:
Obtain the cooling-water temperature transmitter for pumping the coolant temperature of the coolant liquid in locating system；
Obtain the environment temperature sensor of the environment temperature of pump local environment；
Calculate the 4th computing unit of the absolute value of the difference of the coolant temperature and the environment temperature；
Judge the absolute value of the difference of the coolant temperature and the environment temperature whether in the 4th threshold value, if then when
Preceding state is the 4th judging unit of cold state.
In one embodiment of the invention, further includes:
Calculate the 5th computing unit of the absolute value of the difference of pump temperature and environment temperature under cold state；
Judge that the absolute value of the difference of pump temperature and environment temperature is whether in the 5th threshold value under cold state, if then pumping temperature
Spend incredible 5th judging unit of sensor.
In one embodiment of the invention, further includes:
Calculate the 6th computing unit of the absolute value of the difference of pump heter temperature and environment temperature under cold state；
Judge that the absolute value of the difference of pump heter temperature and environment temperature is whether in the 6th threshold value under cold state, if
Then pump incredible 6th judging unit of heater temperature sensor.
It can be seen from the above technical scheme that obtaining the pump temperature pumped under current state and pump heater in the application
Temperature；It pumps heater and preset time is heated with default duty ratio；Pump temperature and pump heater after obtaining heating preset time
Temperature；Calculate the first temperature difference of pump temperature and the pump temperature under current state after heating preset time；Judge the first temperature difference
Whether in first threshold, if then pump temperature sensor is insincere；It pumps heter temperature after calculating heating preset time and works as
The second temperature of pump heter temperature under preceding state is poor；Second temperature difference is judged whether in second threshold, if then pump adds
Hot device temperature sensor is insincere.Pump temperature sensor and pump heter temperature are capable of detecting when by using method of the invention
The insincere failure of sensor makees place mat row for subsequent maintenance, so as to guarantee that engine operates normally.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of flow diagram for the method for detecting insincere property provided by the embodiment of the present invention；
Fig. 2 is the flow diagram for the method that another kind provided by the embodiment of the present invention detects insincere property；
Fig. 3 is that another detects the flow diagram of the method for insincere property provided by the embodiment of the present invention；
Fig. 4 is that another detects the flow diagram of the method for insincere property provided by the embodiment of the present invention；
Fig. 5 is a kind of structural schematic diagram for the device for detecting insincere property provided by the embodiment of the present invention；
Wherein, 201 it is pump temperature sensor, 202 be pump heater, 203 be pump heater temperature sensor, 204 is the
One computing unit, 205 be the first judging unit, 206 be the second computing unit, 207 be second judgment unit.
Specific embodiment
For this purpose, core of the invention is to provide a kind of method for detecting insincere property, to guarantee that engine operates normally.
In addition, embodiments illustrated below does not play any restriction effect to the invention described in the claims content.In addition,
The full content of composition represented by following example is not limited to must as the solution of the invention described in the claims
It needs.
Referring to Fig. 1, a kind of method for detecting insincere property disclosed in the embodiment of the present invention, comprising the following steps:
S101: the pump temperature pumped under current state and pump heter temperature are obtained；
If pump is urea pump, by the way that the pump temperature sensor inside urea pump is arranged in, urea pump internal pump temperature is detected
Degree；Pump heater temperature sensor then as pump heater temperature sensor, detection pumps the pump heter temperature of heater body.Its
In, the testing result for the pump temperature sensor being arranged inside urea pump is percentage, rather than temperature value, therefore is urinated in order to obtain
Element pump pump temperature also needs the testing result based on pump temperature sensor to be calculated.The side of interpolation calculation is used in the present embodiment
Urea pump pump temperature is calculated in formula, the testing result based on temperature sensor.
Under current state, pump temperature is denoted as Tp1；Heter temperature is denoted as Th1；
Before S101 step further include: determine that current state is cold state.It determines that current state is cold state, says
Urea pump in bright current system starts to start not yet, will not exist since urea pump operation leads to the case where generating heat
Occur, and then the temperature of the pump temperature of all parts and all parts local environment should identical or substantially phase in system
Together.The coolant temperature for pumping the coolant liquid in locating system, is denoted as Tc；The environment temperature of urea pump local environment, is denoted as
Tenv1.Wherein, since urea pump and urea pump heater are in same system, urea pump local environment and urea pump
Heater local environment is identical, and then urea pump local environment temperature and urea pump heater local environment temperature are identical
's.Meanwhile the temperature sensor by being arranged in pump local environment, detection obtain the temperature of pump local environment.Wherein, it is arranged
Temperature sensor in the environment can directly detect to obtain temperature value, such as PT100 temperature sensor.
The determining current state includes: for cold state
Obtain the coolant temperature Tc for pumping the coolant liquid in the locating system and environment temperature Tenv1 for pumping local environment；
Calculate the absolute value of the difference ︱ Tc-Tenv1 ︱ of the coolant temperature Yu the environment temperature；Judge the coolant liquid
Whether the absolute value of the difference of temperature and the environment temperature is in the 4th threshold value, if then current state is cold state.
Determining whether system is in the mode of cold state in the present embodiment includes determining whether system is according to temperature
Cold state, or determine whether system is in cold state by detecting electric signal.
S102: pump heater heats preset time with default duty ratio；Wherein, it presets empty accounting and is denoted as Rh, preset time
It is denoted as Ti.
S103: pump temperature and pump heter temperature after obtaining heating preset time；Pump temperature after heating preset time
Degree remembers Tp2；Heter temperature remembers Th2.
S104: the first temperature difference Tp2-Tp1 of pump temperature and the pump temperature under current state after heating preset time is calculated；
S105: the first temperature difference is judged whether in first threshold, if then pump temperature sensor is insincere；
In the present embodiment, first threshold can be rule of thumb determined, such as the first threshold can be 0, at this point,
Tp2-Tp1 > 0, the present invention can be risen using pump temperature after pump heater heating preset time T i, if Tp2-Tp1 > 0, illustrates
The insincere failure of pump temperature sensor.
S106: the second temperature of pump heter temperature and the pump heter temperature under current state after heating preset time is calculated
Spend difference Th2-Th1；
S107: second temperature difference is judged whether in second threshold, if it is insincere then to pump heater temperature sensor.
In the present embodiment, second threshold can be rule of thumb determined, such as the second threshold can be 0, at this point,
Th2-Th1 > 0, the present invention can be risen using pump heater heating temperature after pump heater heating preset time T i, if Th2-Th1
> 0 then illustrates the insincere failure of pump heater temperature sensor.
In order to further increase the precision of above-mentioned detection, the insincere property of detection is also disclosed in another embodiment of the present invention
Method, this method further comprises the steps of: on the basis of above embodiments
S108: the third temperature difference Th2-Tp2 of pump heter temperature and pump temperature after heating preset time is calculated；
S109: third temperature difference is judged whether in third threshold value, then pump temperature sensor and pump heter temperature sense
Device is insincere.
In the present embodiment, in real process, the ascending temperature for pumping heater is faster than what pump temperature rose, theoretically Th2
> Tp2.Third threshold value can be rule of thumb determined, for example, (Th2-Tp2) is in section (- ∝, Δ T2min) ∪ (Δ
T2max ,+∝) then illustrate pump temperature sensor and the pump insincere failure of heater temperature sensor, wherein Δ T2min and Δ
T2max according to environment temperature Tenv1, whether be that cold post-start, heating duty ratio Rh and heating time Ti table look-up and respectively obtain.
In order to further increase the precision of above-mentioned detection, the insincere property of detection is also disclosed in another embodiment of the present invention
Method, this method further comprises the steps of: on the basis of above embodiments
S110: the absolute value of the difference ︱ Tp1-Tenv1 ︱ of pump temperature and environment temperature under cold state is calculated；
S111: judge that whether the absolute value of the difference ︱ Tp1-Tenv1 ︱ of pump temperature and environment temperature is the 5th under cold state
In threshold value, if then pump temperature sensor is insincere.
Wherein, the 5th threshold value illustrates pump temperature sensor not if Tp1-Tenv1 deviation is excessive for scalar quantity Δ T1
Conceivable malfunction.
In order to further increase the precision of above-mentioned detection, the insincere property of detection is also disclosed in another embodiment of the present invention
Method, this method further comprises the steps of: on the basis of above embodiments
S112: the absolute value of the difference ︱ Th1-Tenv1 ︱ that heter temperature and environment temperature are pumped under cold state is calculated；
S113: judge to pump under cold state heter temperature and environment temperature absolute value of the difference ︱ Th1-Tenv1 ︱ whether
In the 6th threshold value, if it is insincere then to pump heater temperature sensor.
Wherein, the 6th threshold value is scalar quantity Δ T1, if Th1-Tenv1 deviation is excessive, illustrates that pumping heter temperature passes
The insincere failure of sensor.
If the equal deviation of Tp1-Tenv1 and Th1-Tenv1 is excessive, illustrate pump temperature sensor and pump heter temperature sensing
The insincere failure of device.
Referring to Fig. 2, the invention also discloses a kind of devices for detecting insincere property, comprising: pump temperature sensor 201,
It pumps heater temperature sensor 203, pump heater 202, the first computing unit 204, the first judging unit 205, second and calculates list
Member 206 and second judgment unit 207.
Wherein, pump temperature sensor 201, for obtaining the pump temperature of pump, wherein the pump temperature of current state is denoted as Tp1,
Pump temperature is denoted as Tp2 after heating preset time T i；
Heater temperature sensor 203 is pumped, for obtaining pump 202 temperature of heater, wherein the pump heater of current state
202 temperature are denoted as Th1, and pump 202 temperature of heater is denoted as Th2 after heating preset time T i；
Heater 202 is pumped, for default empty accounting Rh heat pump preset time T i；
First computing unit 204, for calculating the of the pump temperature after heating preset time under pump temperature and current state
One temperature difference Tp2-Tp1；
First judging unit 205, for judging the first temperature difference Tp2-Tp1 whether in first threshold, if then pumping temperature
It is insincere to spend sensor 201；Th2–Th1
Second computing unit 206, for pumping 202 temperature of heater and the pump under current state after calculating heating preset time
The second temperature of 202 temperature of heater is poor；
Second judgment unit 207, for judging second temperature difference Th2-Th1 whether in second threshold, if then pump adds
Hot device temperature sensor 203 is insincere.
If pump is urea pump, by the way that the pump temperature sensor 201 inside urea pump is arranged in, urea pump internal pump is detected
Temperature；Pump heater temperature sensor 203 then as pump heater temperature sensor 203, the pump inside detection pump heater 202 adds
Hot 202 temperature of device.Wherein, the testing result for the pump temperature sensor 201 being arranged inside urea pump is percentage, rather than temperature
Value, therefore urea pump pump temperature also needs the testing result based on pump temperature sensor 201 to be calculated in order to obtain.This implementation
In example by the way of interpolation calculation, urea pump pump temperature is calculated in the testing result based on temperature sensor.
In another embodiment of the present invention, the device of the insincere property of the detection further include: third computing unit and
Three judging units.Wherein,
Third computing unit, for calculate heating preset time after pump 202 temperature of heater and pump temperature third temperature
The Th2-Tp2 of difference；
Third judging unit, for judge third temperature difference Th2-Tp2 whether in third threshold value, then pump temperature sensor
201 and pump heater temperature sensor 203 it is insincere.
In the present embodiment, in real process, the ascending temperature for pumping heater 202 is faster than what pump temperature rose, theoretically
Th2 > Tp2.Third threshold value can be rule of thumb determined, for example, (Th2-Tp2) is in section (- ∝, Δ T2min) ∪
(Δ T2max ,+∝) then illustrates pump temperature sensor 201 and the pump insincere failure of heater temperature sensor 203, wherein Δ
T2min and Δ T2max according to environment temperature Tenv1, whether be that cold post-start, heating duty ratio Rh and heating time Ti table look-up point
It does not obtain.
In another embodiment of the present invention, the device of the insincere property of the detection further include: determine that current state is cold
The determination unit of machine state.It determines that current state is cold state, illustrates that the urea pump in current system starts to start not yet,
Will not exist due to urea pump operation cause generate heat the case where generation, and then in system the pump temperature of all parts and
The temperature of all parts local environment should be identical or roughly the same.The coolant temperature of the coolant liquid in locating system is pumped,
It is denoted as Tc；The environment temperature of urea pump local environment, is denoted as Tenv1.Wherein, at due to urea pump and urea pump heater 202
In same system, therefore, urea pump local environment is identical, and then urea pump with 202 local environment of urea pump heater
Local environment temperature is identical with 202 local environment temperature of urea pump heater.Meanwhile through setting in pump local environment
Temperature sensor, detection obtain pump local environment temperature.Wherein, the temperature sensor being arranged in the environment can be examined directly
Temperature value is measured, such as PT100 temperature sensor.
The determination unit includes: that cooling-water temperature transmitter, environment temperature sensor, the 4th computing unit and the 4th are sentenced
Disconnected unit.Wherein,
Cooling-water temperature transmitter, for obtaining the coolant temperature Tc for pumping the coolant liquid in locating system；
Environment temperature sensor, for obtaining the environment temperature Tenv1 of pump local environment；
4th computing unit, for calculating the absolute value of the difference ︱ Tc- of the coolant temperature Yu the environment temperature
Tenv1 ︱；
4th judging unit, for judging the absolute value of the difference ︱ Tc- of the coolant temperature Yu the environment temperature
Whether Tenv1 ︱ is in the 4th threshold value, if then current state is cold state.
Determining whether system is in the mode of cold state in the present embodiment includes determining whether system is according to temperature
Cold state, or determine whether system is in cold state by detecting electric signal.
In another embodiment of the present invention, the device of the insincere property of the detection further include: the 5th computing unit and
Five judging units.Wherein,
5th computing unit, for calculating the absolute value of the difference ︱ Tp1- of pump temperature and environment temperature under cold state
Tenv1 ︱；
5th judging unit, for judging the absolute value of the difference ︱ Tp1- of pump temperature and environment temperature under cold state
Whether Tenv1 ︱ is in the 5th threshold value, if then pump temperature sensor 201 is insincere.
Wherein, the 5th threshold value illustrates pump temperature sensor 201 if Tp1-Tenv1 deviation is excessive for scalar quantity Δ T1
Insincere failure.
In another embodiment of the present invention, the device of the insincere property of the detection further include: the 6th computing unit and
Six judging units.Wherein,
6th computing unit, for calculating the absolute value of the difference for pumping heater 202 temperature and environment temperature under cold state
︱ Th1-Tenv1 ︱；
6th judging unit, the absolute value of the difference ︱ for judging to pump 202 temperature of heater and environment temperature under cold state
Whether Th1-Tenv1 ︱ is in the 6th threshold value, if it is insincere then to pump heater temperature sensor 203.
Wherein, the 6th threshold value is scalar quantity Δ T1, if Th1-Tenv1 deviation is excessive, illustrates that pumping heter temperature passes
The insincere failure of sensor 203.
If the equal deviation of Tp1-Tenv1 and Th1-Tenv1 is excessive, illustrate pump temperature sensor 201 and pump heter temperature
The insincere failure of sensor 203.
It can be seen from the above technical scheme that obtaining the pump temperature pumped under current state and pump heater in the application
202 temperature；It pumps heater 202 and preset time is heated with default duty ratio；Pump temperature and pump after obtaining heating preset time
202 temperature of heater；Calculate the first temperature difference of pump temperature and the pump temperature under current state after heating preset time；Judge
Whether one temperature difference is in first threshold, if then pump temperature sensor 201 is insincere；Heating is pumped after calculating heating preset time
202 temperature of device and the second temperature of pump 202 temperature of heater under current state are poor；Judge second temperature difference whether in the second threshold
In value, if it is insincere then to pump heater temperature sensor 203.It is capable of detecting when that pump temperature passes by using method of the invention
The insincere failure of sensor 201 and pump heater temperature sensor 203 makees place mat row for subsequent maintenance, so as to guarantee to send out
Motivation operates normally.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.The device provided for embodiment
For, since it is corresponding with the method that embodiment provides, so being described relatively simple, related place is said referring to method part
It is bright.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or equipment for including a series of elements not only includes those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or equipment institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including institute
State in the process, method, article or equipment of element that there is also other identical elements.
The foregoing description of the disclosed embodiments can be realized those skilled in the art or using the present invention.To this
A variety of modifications of a little embodiments will be apparent for a person skilled in the art, and the general principles defined herein can
Without departing from the spirit or scope of the present invention, to realize in other embodiments.Therefore, the present invention will not be limited
It is formed on the embodiments shown herein, and is to fit to consistent with the principles and novel features disclosed in this article widest
Range.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (12)
1. a kind of method for detecting insincere property characterized by comprising
Obtain the pump temperature pumped under current state and pump heter temperature；
It pumps heater and preset time is heated with default duty ratio；
Pump temperature and pump heter temperature after obtaining heating preset time；
Calculate the first temperature difference of pump temperature and the pump temperature under current state after heating preset time；
The first temperature difference is judged whether in first threshold, if then pump temperature sensor is insincere；
The second temperature for calculating pump heter temperature and the pump heter temperature under current state after heating preset time is poor；
Second temperature difference is judged whether in second threshold, if it is insincere then to pump heater temperature sensor.
2. detecting the method for insincere property as described in claim 1, which is characterized in that further include:
Calculate the third temperature difference that heter temperature and pump temperature are pumped after heating preset time；
Third temperature difference is judged whether in third threshold value, then pump temperature sensor and pump heater temperature sensor are insincere.
3. detecting the method for insincere property as described in claim 1, which is characterized in that the method also includes: it determines current
State is cold state.
4. detecting the method for insincere property as claimed in claim 3, which is characterized in that the determining current state is cold shape
State includes:
Obtain the coolant temperature for pumping the coolant liquid in locating system and the environment temperature for pumping local environment；
Calculate the absolute value of the difference of the coolant temperature Yu the environment temperature；
The absolute value of the difference of the coolant temperature and the environment temperature is judged whether in the 4th threshold value, if then current shape
State is cold state.
5. detecting the method for insincere property as claimed in claim 4, which is characterized in that further include:
Calculate the absolute value of the difference of pump temperature and environment temperature under cold state；
Judge that the absolute value of the difference of pump temperature and environment temperature is whether in the 5th threshold value under cold state, if then pump temperature passes
Sensor is insincere.
6. detecting the method for insincere property as claimed in claim 4, which is characterized in that further include:
Calculate the absolute value of the difference that heter temperature and environment temperature are pumped under cold state；
Judge that the absolute value of the difference of pump heter temperature and environment temperature is whether in the 6th threshold value under cold state, if then pumping
Heater temperature sensor is insincere.
7. a kind of device for detecting insincere property characterized by comprising
Obtain the pump temperature sensor of the pump temperature of pump；
Obtain the pump heater temperature sensor of pump heter temperature；
With the pump heater of default empty accounting heat pump preset time；
Calculate the first computing unit of the first temperature difference of pump temperature and the pump temperature under current state after heating preset time；
The first temperature difference is judged whether in first threshold, if then incredible first judging unit of pump temperature sensor；
Calculate the second temperature of pump heter temperature and the pump heter temperature under current state after heating preset time it is poor the
Two computing units；And
Second temperature difference is judged whether in second threshold, if it is single then to pump incredible second judgement of heater temperature sensor
Member.
8. detecting the device of insincere property as claimed in claim 7, which is characterized in that further include:
Calculate the third computing unit that the third temperature difference of heter temperature and pump temperature is pumped after heating preset time；And
Third temperature difference is judged whether in third threshold value, then pump temperature sensor and pump heater temperature sensor are incredible
Third judging unit.
9. detecting the device of insincere property as claimed in claim 7, which is characterized in that described device further include: determine current
State is the determination unit of cold state.
10. detecting the device of insincere property as claimed in claim 9, which is characterized in that the determination unit includes:
Obtain the cooling-water temperature transmitter for pumping the coolant temperature of the coolant liquid in locating system；
Obtain the environment temperature sensor of the environment temperature of pump local environment；
Calculate the 4th computing unit of the absolute value of the difference of the coolant temperature and the environment temperature；
The absolute value of the difference of the coolant temperature and the environment temperature is judged whether in the 4th threshold value, if then current shape
State is the 4th judging unit of cold state.
11. detecting the device of insincere property as claimed in claim 10, which is characterized in that further include:
Calculate the 5th computing unit of the absolute value of the difference of pump temperature and environment temperature under cold state；
Judge that the absolute value of the difference of pump temperature and environment temperature is whether in the 5th threshold value under cold state, if then pump temperature passes
Incredible 5th judging unit of sensor.
12. detecting the device of insincere property as claimed in claim 10, which is characterized in that further include:
Calculate the 6th computing unit of the absolute value of the difference of pump heter temperature and environment temperature under cold state；
Judge that the absolute value of the difference of pump heter temperature and environment temperature is whether in the 6th threshold value under cold state, if then pumping
Incredible 6th judging unit of heater temperature sensor.
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| CN201811155808.1A CN109297618A (en) | 2018-09-30 | 2018-09-30 | A kind of method and device detecting insincere property |
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| CN201811155808.1A CN109297618A (en) | 2018-09-30 | 2018-09-30 | A kind of method and device detecting insincere property |
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| CN110006556A (en) * | 2019-06-06 | 2019-07-12 | 潍柴动力股份有限公司 | ECU temperature acquisition method for detecting abnormality and relevant apparatus |
| CN110107389A (en) * | 2019-07-08 | 2019-08-09 | 潍柴动力股份有限公司 | A kind of creditability detection method and device of temperature sensor |
| CN110953056A (en) * | 2020-02-24 | 2020-04-03 | 潍柴动力股份有限公司 | Over-temperature detection method, device and equipment for urea injection system and storage medium |
| CN111103072A (en) * | 2019-12-26 | 2020-05-05 | 一汽解放汽车有限公司 | Urea tank fault diagnosis method and device, vehicle and storage medium |
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| CN114235271A (en) * | 2021-11-12 | 2022-03-25 | 潍柴动力股份有限公司 | Method and device for detecting dew point of differential pressure sensor, storage medium and equipment |
| CN114235271B (en) * | 2021-11-12 | 2024-01-12 | 潍柴动力股份有限公司 | Dew point detection method and device for differential pressure sensor, storage medium and equipment |
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