CN109386416A - Dry operating diagnostic system and method for fuel pump - Google Patents
Dry operating diagnostic system and method for fuel pump Download PDFInfo
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- CN109386416A CN109386416A CN201710652047.XA CN201710652047A CN109386416A CN 109386416 A CN109386416 A CN 109386416A CN 201710652047 A CN201710652047 A CN 201710652047A CN 109386416 A CN109386416 A CN 109386416A
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- fuel pump
- revolving speed
- dry operating
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- rotational speed
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven pumps
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- 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
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- 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 present invention relates to a kind of dry operating diagnostic systems for fuel pump, comprising: real-time Rotating speed measring module, the real-time Rotating speed measring module are used to detect the real-time revolving speed of fuel pump；Estimate that revolving speed obtains module, which obtains the estimation revolving speed that module is used to obtain fuel pump；Subtracter, the subtracter are used to seek the rotational speed difference between the real-time revolving speed and the estimation revolving speed；Schmidt trigger, the Schmidt trigger generate the corresponding signal for reflecting the current operation state of the fuel pump according to the rotational speed difference from the subtracter.The invention further relates to a kind of dry operating diagnostic methods for fuel pump, and this method comprises the following steps: detecting the real-time revolving speed of fuel pump；Obtain the estimation revolving speed of fuel pump；Calculate the rotational speed difference between the real-time revolving speed of fuel pump and estimation revolving speed；The rotational speed difference being calculated is compared with preset threshold value, and generates the corresponding signal of the current operation state of reflection fuel pump based on comparative result.
Description
Technical field
The present invention relates to fuel pump fields, are used for fuel pump, especially brushed DC fuel pump more particularly, to one kind
Dry operating diagnostic system and method.
Background technique
Since there are low oil level situations for fuel tank of vehicle, fuel pump may be in dry operating condition at this time.Such as not in time eventually
The only operation of fuel pump, it will it is serious to occur that fuel oil pump core overheat is burnt out, fuel oil is ignited, vehicle stops working suddenly due to oil-break etc.
Failure.
When the dry operating of oil pump generation, electric current is compared to oil pump normal operation Shi Yao little, and electric current and oil pump power supply are electric
It is pressed with corresponding relationship.Therefore, in the dry operating diagnostic techniques of traditional oil pump, it is normally set up the dry operating of certain voltage-to-current
Threshold curve, in system operation by oil pump controller on-line checking oil pump voltage, the magnitude of current, after carrying out signal processing and in advance
If threshold curve be compared, to judge whether oil pump occurs dry operational failure.
However, the shortcomings that this conventional method is: firstly, oil pump mean value electric current tolerance is larger, bulk article has larger
Discreteness, it is higher to will lead to preset voltage-mean value current curve, so as to cause the threshold current curve upper limit and normal current
Lower limit relatively, has compressed current buffering interval width (referring to Fig. 3)；Secondly, oil pump current pulse amplitude is larger, it is reachable
+/- 2 ampere levels can further increase dry revolution electric current deviation, reduce buffer area.
Therefore, there is batch fuel pump normal operating current certain probability to fall in voltage-to-current threshold curve hereinafter, i.e.
Normal area may have a small amount of Chong Die (current buffering area is negative) with faulty section, so as to cause the mistake that the dry operating diagnosis of oil pump occurs
Sentence, so such algorithm reliability is not high, is rarely employed.
Therefore, brush pump controller seldom carries dry operating diagnostic function.In fact, all currently on the market have brush to pump
Controller is all without direct rotary test speed function, so cannot achieve has the dry operating diagnostic function of brush fuel pump based on revolving speed.
But the dry running protection for fuel pump is critically important function, is related to safety problem.The fuel oil of dry operating
Pump can generate amount of heat, and the fuel oil not flowed is cooled down, it will constantly accumulation heat is until itself burn out.Dry operating produces
Raw amount of heat, may be ignited itself component with lower probability, thus the further fuel oil in pilot fuel case, seriously
When cause vehicle body to burn；The fuel pump that itself burns out due to dry operating, will be unable to continue to supply fuel oil to engine, will lead to vehicle
It is flame-out suddenly, serious traffic accident can be caused when serious.
Summary of the invention
The present invention is directed to fill up the market vacancy for being directed to the dry operating diagnostic function for having brush fuel pump, propose a kind of for firing
The dry operating diagnostic system and method for oil pump by obtaining the real-time revolving speed and estimation revolving speed of fuel pump, and are made the two difference
Schmidt trigger, finally obtain reliable fuel pump do operating condition diagnostic result, thus improve fuel system safety with
Reliability.
According to one embodiment of present invention, a kind of dry operating diagnostic system for fuel pump can include: real-time revolving speed
Detection module, the real-time Rotating speed measring module are used to detect the real-time revolving speed of fuel pump；Estimate that revolving speed obtains module, which turns
Speed obtains the estimation revolving speed that module is used to obtain fuel pump；Subtracter, the subtracter for seek the real-time revolving speed with it is described
Estimate the rotational speed difference between revolving speed；Schmidt trigger, the Schmidt trigger are produced according to the rotational speed difference from the subtracter
The corresponding signal of the raw current operation state for reflecting the fuel pump.The invention further relates to a kind of dry operatings for fuel pump to examine
Disconnected method.
Preferably, it may include fuel pump property database that the estimation revolving speed, which obtains module, in the fuel pump performance data
The lookup unit related with fuel oil pump characteristics obtained by experimental data is previously stored in library, when by the voltage of fuel pump and
When electric current is brought into the lookup unit as input, the estimation revolving speed of the fuel pump can be retrieved.
Preferably, positive threshold and negative sense threshold value, the positive threshold can be respectively set for the Schmidt trigger
Greater than the negative sense threshold value.
Preferably, when the rotational speed difference from the subtracter is less than or equal to the negative sense threshold value, Schmidt's touching
The exportable low level of device is sent out, to indicate that the fuel pump is in normal operation.
Preferably, when the rotational speed difference from the subtracter is greater than or equal to the positive threshold, Schmidt's touching
The exportable high level of device is sent out, to indicate that the fuel pump is in dry operating condition.
Preferably, when the rotational speed difference from the subtracter is between the negative sense threshold value and the positive threshold,
The level state that the Schmidt trigger can keep its current.
Preferably, which may also include alarm device, for example, the case where the Schmidt trigger exports high level
Under, the capable of emitting alarm of alarm device.Alternatively, which can also be defeated in the case where Schmidt trigger exports low level situation
Alarm out.
According to another embodiment of the present invention, a kind of dry operating diagnostic method for fuel pump may include following steps:
Detect the real-time revolving speed of fuel pump；Obtain the estimation revolving speed of fuel pump；It calculates between the real-time revolving speed of fuel pump and estimation revolving speed
Rotational speed difference；The rotational speed difference being calculated is compared with preset threshold value, and generates reflection combustion based on comparative result
The corresponding signal of the current operation state of oil pump.
Wherein, the step of obtaining the estimation revolving speed of fuel pump includes: to bring into using the electric current of fuel pump and voltage as input
Into the lookup unit related with fuel oil pump characteristics being obtained ahead of time by experimental data, so that the estimation for retrieving fuel pump turns
Speed.
In addition, the preset threshold value may include positive threshold and negative sense threshold value, the positive threshold is greater than described
Negative sense threshold value.
Preferably, this method may also include that when the rotational speed difference is less than or equal to the negative sense threshold value, export low electricity
It is flat, to indicate that fuel pump is in normal operation.
Preferably, this method may also include that when the rotational speed difference is greater than or equal to the positive threshold, export high electricity
It is flat, to indicate that fuel pump is in dry operating condition.
Preferably, this method may also include that when the rotational speed difference is between the negative sense threshold value and the positive threshold
When, keep current level state.
Preferably, this method may also include that when exporting high level, sound an alarm.
Compared with prior art, the dry operating diagnostic system of the fuel pump of the invention based on revolving speed can obtain bigger turn
Fast buffer area, better reliability can be improved the safety and reliability of fuel system
In addition, the dry operating diagnostic method of fuel pump of the invention triggers alarm signal using Schmidt trigger, can keep away
Exempt from rotational speed difference caused a possibility that triggering alarm repeatedly, eliminating false triggering when a certain Near Threshold vibrates, can be directed to
Fuel pump does operating condition and provides stable fault warning.
Detailed description of the invention
The embodiment of the present invention is further described hereinafter with reference to attached drawing, in the accompanying drawings:
Fig. 1 shows the structure of the dry operating diagnostic system for fuel pump of an exemplary embodiment of the present invention
Figure；
Fig. 2 shows the workflows of the dry operating diagnostic method for fuel pump of an exemplary embodiment of the present invention
Cheng Tu；
Fig. 3 shows the dry operating diagnostic method of traditional oil pump based on electric current and the oil pump according to the present invention based on revolving speed
The contrast effect figure of dry operating diagnostic method.
Specific embodiment
Dry operating diagnosis system according to the present invention for fuel pump is described below with reference to accompanying drawings and by embodiment
System and method.In the following description, numerous specific details are set forth to make person of ordinary skill in the field more comprehensively
Ground understands the present invention.But for the technical staff in technical field it is evident that realization of the invention can not have this
It is some in a little details.On the contrary, it may be considered that implement the present invention with any combination of following feature and element, and nothing
Whether it is related to different embodiments by them.Therefore, method, feature, embodiment and advantage below be used for illustrative purposes only without
The element or restriction that should be considered as claim, unless clearly proposing in the claims.
Fig. 1 shows the structure of the dry operating diagnostic system for fuel pump of an exemplary embodiment of the present invention
Figure.As shown in fig. 1, which includes real-time Rotating speed measring module 30 for detecting the real-time revolving speed of fuel pump and for obtaining
The estimation revolving speed of the estimation revolving speed of fuel pump is taken to obtain module 40.As an example, Rotating speed measring module 30 connects with fuel pump in real time
It connects to receive the voltage and current of fuel pump, is detected by the voltage and current pulses frequency to fuel pump, linear transformation
The real-time revolving speed of fuel pump is obtained, for example, by obtaining real-time revolving speed based on the Rotating speed measring method of current impulse.Fuel oil
The voltage and current of pump can be detected using detection unit (such as voltage/current sensor) existing in oil supply system for vehicle,
The detection device additionally installed can also be used to detect or by being calculated.In addition, Rotating speed measring module 30 can be in real time
It is magnetoelectric tachometric transducer, photoelectric tachometric transducer, hall-effect speed sensor etc..
In addition, as an example, it may include fuel pump property database 80 that estimation revolving speed, which obtains module 40, in the database 80
In be previously stored with by experimental data obtain the mono- lookup unit exported of multi input-related with fuel oil pump characteristics, when will
When the electric current and voltage of fuel pump are brought into the lookup unit as input, the estimation revolving speed of fuel pump can be retrieved.This
Field technical staff is it should be understood that the present embodiment is merely exemplary, and the present invention is not precluded and obtains including other
The method for taking the real-time revolving speed and estimation revolving speed of fuel pump.
Dry operating diagnostic system according to the present invention for fuel pump may also include subtracter 50, which can ask
It takes the real-time revolving speed obtained by real-time Rotating speed measring module 30 and is obtained between the estimation revolving speed that module 40 obtains by estimation revolving speed
Rotational speed difference.The system, which may also include, to be connect to receive from it the Schmidt trigger of the rotational speed difference of fuel pump with subtracter 50
60, Schmidt trigger 60 generates the current operation state of reflection fuel pump according to the rotational speed difference being calculated by subtracter 50
Corresponding signal, such as high and low level.
Schmidt trigger 50 is respectively arranged with positive threshold V+ and negative sense threshold value V-, and usually positive threshold V+ can be arranged
For greater than negative sense threshold value V- (alternatively, negative sense threshold value V- can also be equal to positive threshold V+ as needed, in such case
Under, Schmidt trigger 50 have a threshold value, that is, are equal to common comparator).For example, when being calculated by subtracter 50
When the rotational speed difference obtained is less than or equal to negative sense threshold value V-, the exportable low level of Schmidt trigger 50, to indicate at fuel pump
In normal operation.When the rotational speed difference being calculated by subtracter 50 is greater than or equal to positive threshold V+, schmidt trigger
The exportable high level of device 50, to indicate that fuel pump is in dry operating condition.If the rotational speed difference being calculated by subtracter 50
In positive and negative between threshold value, then the output level of Schmidt trigger 50 depends on input and the Schmidt of subtracter 50 simultaneously
The current output state of trigger 50, for example, continuing if the current output state of Schmidt trigger 50 is high level
It is maintained at the high level state (showing that fuel pump keeps current operation state constant), until the rotational speed difference of input is less than negative sense threshold
Value V- is just turned to low level.It will be appreciated by those skilled in the art that Schmidt trigger output high and low level can be with
The corresponding logical signal of digital processing circuit.
In addition, the system may also include alarm device (not shown), which connect with Schmidt trigger 50, works as reception
When to high level from Schmidt trigger 50, alarm device is sounded an alarm.
However, it is understood by those of ordinary skill in the art that above-described embodiment only gives the output electricity of Schmidt trigger 50
One example of the alarm state of gentle alarm device, the present invention is not limited thereto.For example, Schmidt trigger 50 can also come from
The rotational speed difference of subtracter 50 exports low level in the case where being greater than or equal to positive threshold V+, and until rotational speed difference touches negative sense
Threshold value V- is just overturn to high level.In another example alarm device can receive the low level situation from Schmidt trigger 50
Under sound an alarm, do not sounded an alarm when receiving high level.Schmidt trigger 50 can be not only set as needed in user
The positive and negative size to threshold value, can also set under what circumstances Schmidt trigger 50 export high level and which kind of in the case of
The alarm device that sets out sounds an alarm, so as to be stablized, reliable fault warning.
Fig. 2 shows the workflows of the dry operating diagnostic method for fuel pump of an exemplary embodiment of the present invention
Cheng Tu.The each step for implementing to carry out fuel pump the method for dry operating diagnosis is described in detail hereinafter with reference to Fig. 2.
Firstly, in step s101, obtaining the real-time revolving speed of fuel pump.For example, step S101 is preferably included by right
The pulse frequency of the voltage and current of fuel pump detected, linear transformation obtains the real-time revolving speed of fuel pump.
Then, in step s 102, the estimation revolving speed of fuel pump is obtained.For example, as an example, step S102 includes
It is mono- defeated that the electric current of fuel pump and voltage are brought into the multi input-related with fuel oil pump characteristics being obtained ahead of time by experimental data
In lookup unit out, to retrieve the estimation revolving speed of fuel pump.
Furthermore in step s 103, calculate the rotational speed difference between the real-time revolving speed of fuel pump and estimation revolving speed.
In step S104, by the rotational speed difference being calculated in step s 103 and preset positive threshold V+ and bear
It is compared to threshold value V- (preferably, positive threshold V+ is greater than negative sense threshold value V-), and exports corresponding electricity according to comparison result
Ordinary mail number.Specifically, if determining that the rotational speed difference of fuel pump is less than or equal to negative sense threshold value V- in step S104, in step
Low level is exported in rapid S105, and is not sounded an alarm；If determining that the rotational speed difference of fuel pump is greater than or waits in step S104
In positive threshold V+, then high level is exported in step s 106, and sound an alarm；If determining fuel pump in step S104
Rotational speed difference between negative sense threshold value V- and positive threshold V+, then keep current level state in step s 107, and
Maintain the alarm state of current alert/not.
It will be apparent to a skilled person that the above-mentioned dry operating diagnostic system for fuel pump and method not only may be used
It could be applicable to automobile suitable for the dry operating diagnosis of automobile fuel pump in particular for the dry operating diagnosis of brushed DC fuel pump
The dry operating diagnosis of water pump.
Fig. 3 shows the dry operating diagnostic method of traditional oil pump based on electric current and the dry fortune of the oil pump of the invention based on revolving speed
Turn the contrast effect figure of diagnostic method.
As shown in Figure 3, according to the dry operating diagnostic method of traditional oil pump based on electric current, since fuel pump mean value electric current is public
Difference is larger, and bulk article has biggish discreteness, thus has compressed current buffering interval width；In addition, the electric current arteries and veins of fuel pump
It is larger to rush amplitude, up to +/- 2 ampere levels, which further increases dry revolution electric current deviations, reduce buffer area.
And the dry operating diagnostic method of the fuel pump according to the present invention based on revolving speed, due to dry operating revolving speed deviation compared with
It is small, so that bigger revolving speed buffer area can be obtained compared with current method.Such as dry operating revolving speed deviation is usually +/- 200rpm, and it is right
The steady-state current answered is about +/- 0.3A, much smaller than the current pulse amplitude of current method.Turn it can be seen that fuel pump runs well
Speed falls in a possibility that rotary speed threshold value curve or less very little, that is, is avoided that normal area and failure area overlapping.
In addition, dry operating diagnostic method of the invention triggers alarm signal using Schmidt trigger, revolving speed can avoid
Difference caused a possibility that triggering alarm repeatedly, eliminating false triggering when a certain Near Threshold vibrates, fuel pump can be directed to
Dry operating condition provides stable fault warning.
In conclusion the dry operating diagnostic system of fuel pump according to the present invention and method based on the rotary speed information of fuel pump come
The dry working order for diagnosing oil pump by obtaining the real-time revolving speed and estimation revolving speed of fuel pump, and makees Schmidt to the two difference
Triggering, the final diagnostic result for obtaining fuel pump and doing operating condition, better reliability, can be improved the safety of fuel system with
Reliability.
Those of ordinary skill in the art will appreciate that: although only emphasis is illustrated using based on electric current arteries and veins in the embodiment above
The Rotating speed measring algorithm of punching detects the basic skills and principle of the real-time revolving speed of fuel pump, but be not precluded can also benefit by the application
With other any possible rotation speed detection units --- such as magnetoelectric tachometric transducer, photoelectric tachometric transducer, Hall-type
Speed probe etc. --- to detect the real-time revolving speed of fuel pump, and it is not excluded for including other similar processing circuits, coding
Module, coupling circuit and programmable logic circuit.
In this application, it will appreciated by the skilled person that disclosed system can be by another way
It realizes.For example, system embodiment described above is only schematical, for example, the division of the module is only one
Kind of logical function partition, there may be another division manner in actual implementation, for example, multiple modules function can combine or
The function of some module can further be split.Real-time Rotating speed measring mould in the dry operating diagnostic system of the fuel pump of the application
Block, estimation revolving speed obtain module, subtracter, Schmidt trigger and alarm device etc. and can integrate in one processing unit,
It can be modules to physically exist alone, can also be integrated in one unit with two or more modules.It is above-mentioned integrated
Module both can take the form of hardware realization, can also realize in the form of software functional units, or can be used it is soft,
The form of combination of hardware is realized.
If the integrated unit is realized in the form of hardware function units, modules are using hardware logic reality
The circuit-level hardware of existing specific function, and the connection relationship between each hardware is specific hardware annexation.The application
Being electrically connected between the network connection between host computer and each module is realized using above-mentioned hardware, and completes signal biography
It send and processing operation.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, the technical solution of the application is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can be personal computer, server or the network equipment etc.) or processor (processor) or microcontroller
The all or part of the steps of (microcontroller unit) execution each embodiment the method for the application.
Those of ordinary skill in the art will appreciate that: realize that all or part of the steps of above-mentioned each method embodiment can lead to
The relevant hardware of program instruction is crossed to complete.Program above-mentioned can be stored in a computer readable storage medium.The journey
When being executed, execution includes the steps that above-mentioned each method embodiment to sequence；And storage medium above-mentioned include: ROM, RAM, magnetic disk or
The various media that can store program code such as person's CD.In each method embodiment of the present invention, the serial number of each step is simultaneously
The sequencing that cannot be used for limiting each step, for those of ordinary skill in the art, what is do not made the creative labor
Under the premise of, the successive of each step is changed also within protection scope of the present invention.Although the present invention is draped over one's shoulders with preferred embodiment
Dew is as above, but the present invention is not limited to this.Anyone skilled in the art are made without departing from the spirit and scope of the present invention
Various changes and modification, should all be included in protection scope of the present invention, therefore protection scope of the present invention should be wanted with right
It asks subject to limited range.
Although the present invention has been disclosed in the preferred embodiments as above, the present invention is not limited to this.Any those skilled in the art
Member, made various changes and modification, should all be included in protection scope of the present invention without departing from the spirit and scope of the present invention
It is interior, therefore protection scope of the present invention should be defined by the scope defined by the claims..
Claims (14)
1. a kind of dry operating diagnostic system for fuel pump, which is characterized in that the system includes:
Real-time Rotating speed measring module, the real-time Rotating speed measring module are used to detect the real-time revolving speed of fuel pump；
Estimate that revolving speed obtains module, which obtains the estimation revolving speed that module is used to obtain fuel pump；
Subtracter, the subtracter are used to seek the rotational speed difference between the real-time revolving speed and the estimation revolving speed；
Schmidt trigger, which generates according to the rotational speed difference from the subtracter reflects the fuel pump
The corresponding signal of current operation state.
2. the dry operating diagnostic system according to claim 1 for fuel pump, which is characterized in that the estimation revolving speed obtains
Modulus block includes fuel pump property database, is previously stored in the fuel pump property database through experimental data acquisition
Lookup unit related with fuel oil pump characteristics, when using the voltage and current of fuel pump as input be brought into the lookup unit
When, the estimation revolving speed of the fuel pump can be retrieved.
3. the dry operating diagnostic system according to claim 1 or 2 for fuel pump, which is characterized in that applied for described
Schmitt trigger is respectively arranged with positive threshold and negative sense threshold value, and the positive threshold is greater than the negative sense threshold value.
4. the dry operating diagnostic system according to claim 3 for fuel pump, which is characterized in that when from the subtraction
When the rotational speed difference of device is less than or equal to the negative sense threshold value, the Schmidt trigger exports low level, and the fuel pump is in
Normal operation.
5. the dry operating diagnostic system according to claim 3 for fuel pump, which is characterized in that when from the subtraction
When the rotational speed difference of device is greater than or equal to the positive threshold, the Schmidt trigger exports high level, and the fuel pump is in
Dry operating condition.
6. the dry operating diagnostic system according to claim 3 for fuel pump, which is characterized in that when from the subtraction
When the rotational speed difference of device is between the negative sense threshold value and the positive threshold, electricity that the Schmidt trigger keeps its current
Level state.
7. the dry operating diagnostic system according to claim 1 or 2 for fuel pump, which is characterized in that the system is also wrapped
Alarm device is included, when the Schmidt trigger exports high level, the alarm device is sounded an alarm.
8. a kind of dry operating diagnostic method for fuel pump, which is characterized in that this method comprises the following steps:
Detect the real-time revolving speed of fuel pump；
Obtain the estimation revolving speed of fuel pump；
Calculate the rotational speed difference between the real-time revolving speed of fuel pump and estimation revolving speed；
The rotational speed difference being calculated is compared with preset threshold value, and generates reflection fuel pump based on comparative result
The corresponding signal of current operation state.
9. according to the method described in claim 8, it is characterized in that, the step of obtaining the estimation revolving speed of fuel pump includes: that will fire
The electric current and voltage of oil pump are brought into the list of tabling look-up related with fuel oil pump characteristics being obtained ahead of time by experimental data as input
In member, to retrieve the estimation revolving speed of fuel pump.
10. method according to claim 8 or claim 9, which is characterized in that the preset threshold value include positive threshold and
Negative sense threshold value, the positive threshold are greater than the negative sense threshold value.
11. according to the method described in claim 10, it is characterized in that, this method further include:
When the rotational speed difference is less than or equal to the negative sense threshold value, low level is exported, is run well with indicating that fuel pump is in
State.
12. according to the method described in claim 10, it is characterized in that, this method further include:
When the rotational speed difference is greater than or equal to the positive threshold, high level is exported, to indicate that fuel pump is in dry operating shape
State.
13. according to the method described in claim 10, it is characterized in that, this method further include:
When the rotational speed difference is between the negative sense threshold value and the positive threshold, current level state is kept.
14. method according to claim 8 or claim 9, which is characterized in that this method further include: when exporting high level, issue
Alarm.
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| CN201710652047.XA CN109386416B (en) | 2017-08-02 | 2017-08-02 | Dry run diagnostic system and method for fuel pump |
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| CN201710652047.XA CN109386416B (en) | 2017-08-02 | 2017-08-02 | Dry run diagnostic system and method for fuel pump |
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| CN109386416B CN109386416B (en) | 2021-01-22 |
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| CN113294328A (en) * | 2021-05-27 | 2021-08-24 | 盛瑞传动股份有限公司 | Fault diagnosis method for excessive difference in rotation speed of electric pump, electronic device, and storage medium |
| CN113357067A (en) * | 2021-06-24 | 2021-09-07 | 中国第一汽车股份有限公司 | Electric fuel pump control method and device, electronic equipment and storage medium |
| CN113982771A (en) * | 2020-07-27 | 2022-01-28 | 纬湃汽车电子(芜湖)有限公司 | Fuel pump service life evaluation method and fuel pump controller thereof |
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| CN113982771A (en) * | 2020-07-27 | 2022-01-28 | 纬湃汽车电子(芜湖)有限公司 | Fuel pump service life evaluation method and fuel pump controller thereof |
| CN113982771B (en) * | 2020-07-27 | 2023-10-27 | 纬湃汽车电子(芜湖)有限公司 | Fuel pump life assessment method and fuel pump controller thereof |
| CN113294328A (en) * | 2021-05-27 | 2021-08-24 | 盛瑞传动股份有限公司 | Fault diagnosis method for excessive difference in rotation speed of electric pump, electronic device, and storage medium |
| CN113357067A (en) * | 2021-06-24 | 2021-09-07 | 中国第一汽车股份有限公司 | Electric fuel pump control method and device, electronic equipment and storage medium |
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