CN113982771A - Fuel pump service life evaluation method and fuel pump controller thereof - Google Patents
Fuel pump service life evaluation method and fuel pump controller thereof Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/3082—Control of electrical fuel pumps
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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
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/20—Varying fuel delivery in quantity or timing
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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
- F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
Abstract
The invention relates to a method for assessing the life of a fuel pump, comprising: acquiring the accumulated running time of the fuel pump; acquiring actual fuel pressure and/or actual output flow of a fuel pump; obtaining pump core parameters which comprise pump core voltage and/or pump core current and/or pump core rotating speed; if necessary, obtaining an external environment parameter, preferably a fuel temperature, particularly preferably a vehicle mileage and/or an instantaneous fuel consumption and/or an engine speed; determining estimated fuel pressure and/or fuel pump output flow by means of a fuel pump life model according to the acquired accumulated running time of the fuel pump, pump core parameters and external environment parameters if necessary; the estimated fuel pressure and/or fuel pump output flow is compared to the actual fuel pressure and/or fuel pump output flow, respectively, to determine an estimated fuel pump life. The invention also relates to a fuel pump controller for carrying out the method.
Description
Technical Field
The invention relates to a fuel pump service life evaluation method and a fuel pump controller thereof.
Background
At present, the work and life of motor vehicles and people are inseparable. The fuel pump is used as the heart of the whole vehicle, and fuel oil needs to be supplied to the engine timely according to the requirement, so that the normal running of the whole vehicle is guaranteed. However, the quality of various fuels in the current market is uneven, most fuels usually contain moisture, sulfur, particles with different sizes and the like, and the fuel pump, particularly the brushed fuel pump, is easy to age in advance, so that the performance of the fuel pump is greatly attenuated, the fuel supply is insufficient, the normal operation of an engine is influenced, and flameout faults occur. This is likely to cause traffic accidents when the motor vehicle is traveling at high speed. Existing fuel pump controllers, and even fuel supply systems, are unable to recognize this abnormal degradation of the fuel pump and take precautionary measures in advance when the fuel pump life is too low.
Disclosure of Invention
The invention aims to fill the market blank of a fuel pump service life evaluation function, provides a fuel pump service life evaluation method, is applied to fuel pump control, monitors and evaluates the service life state of a fuel pump in real time, provides early warning information in time, prompts a driver to replace or maintain the fuel pump in time, and avoids traffic accidents caused by sudden flameout faults during driving, particularly high-speed driving.
According to one aspect of the invention, the method for evaluating the life of the fuel pump comprises the following steps:
-obtaining a cumulative fuel pump running time;
-obtaining an actual fuel pressure and/or an actual fuel pump output flow;
acquiring pump core parameters of the fuel pump, wherein the pump core parameters comprise pump core voltage and/or pump core current and/or pump core rotating speed;
-determining an estimated fuel pressure and/or an estimated fuel pump output flow by means of a fuel pump life model based on an accumulated fuel pump running time and a pump core parameter;
-comparing the estimated fuel pressure and/or estimated fuel pump output flow with the actual fuel pressure and/or actual fuel pump output flow, respectively, to determine a fuel pump life estimate.
The fuel pump is used as the core and the power source of a low-pressure system, and the most important function is to output the fuel injection quantity required by an engine, so the output flow of the fuel pump is a very important and direct parameter index of the fuel pump. When the fuel pump normally operates and ages, the output flow of the fuel pump can be reduced to a certain extent under the same conditions, namely the same pump core voltage, the same fuel supply pressure or the same pump core rotating speed. Therefore, the output flow information of the fuel pump can be estimated according to the life model of the fuel pump and compared with the actual output flow to estimate the life state of the fuel pump. However, the whole vehicle system usually has no actual output flow data as a reference, so a flow meter is additionally installed at a proper position of the vehicle to detect the actual output flow. Alternatively, fuel pressure may be used instead of fuel pump output flow to assess fuel pump life status. The actual fuel pressure is sensed during control of the fuel pump to supply the engine on demand, and the fuel pressure can also be estimated from a fuel pump life model, so that the fuel pressure comparison is easily accomplished.
In the present invention, a fuel pump life model is previously created, which describes the pump core parameters of the fuel pump, i.e. the pump core voltage, the pump core current and the pump core rotational speed, as well as the fuel pressure and/or the output flow of the fuel pump, for an accumulated operating time of the fuel pump (and if necessary also external environmental parameters, in particular the fuel temperature). An estimated fuel pressure and/or fuel pump output flow may be determined from a fuel pump life model based on the accumulated fuel pump operating time (and, if necessary, ambient parameters) and the pump core parameters, and an estimated fuel pump life may be determined by comparing the estimated fuel pressure and/or fuel pump output flow to the actual fuel pressure and/or fuel pump output flow. The method has the advantages that the method for evaluating the service life of the fuel pump is provided for the first time, the service life of the fuel pump can be estimated, and therefore driving safety is improved.
When the estimated life of the fuel pump obtained by the fuel pressure and the output flow of the fuel pump exist at the same time, the two can also be checked for reliability, so that errors caused by failure of an oil pressure sensor or a flow meter are avoided, and the safety is further improved.
According to an advantageous embodiment of the method according to the invention, the method further comprises the following steps:
-obtaining an ambient environment parameter,
the external environment parameters are also taken into account when estimating the fuel pressure and/or the fuel pump output flow by means of a fuel pump life model.
The ambient parameter is preferably the fuel temperature. Particularly preferably, the external environmental parameter additionally comprises one or more of vehicle mileage, instantaneous fuel consumption and engine speed in addition to the fuel temperature. In other words, when estimating the fuel pressure and/or the fuel pump output flow by means of the fuel pump life model, in addition to the fuel temperature, the vehicle mileage and/or the instantaneous fuel consumption and/or the engine speed are also taken into account.
Generally, the influence of the fuel temperature on the fuel pressure and output flow of the fuel pump is large, and the fuel pump life model is more accurate by considering the influence of the fuel temperature in the fuel pump life model, so that the fuel pressure and/or the output flow of the fuel pump and the service life of the fuel pump can be estimated more accurately. Of course, the estimated fuel pump life is more accurate if more external environmental parameters are considered, such as vehicle mileage, instantaneous fuel consumption, engine speed, etc.
According to an advantageous embodiment of the method according to the invention, the fuel pump life model is a multidimensional data look-up table which is created on the basis of experimental data and which describes the correspondence between pump core parameters and fuel pressure and output flow of the fuel pump for the respective fuel pump at the cumulative operating time and in particular for the ambient parameters. Preferably, the fuel pump life model is established based on a large amount of data on the pump core voltage, the pump core current, the pump core rotating speed, the fuel pressure, the output flow rate of the fuel pump, the fuel temperature, the driving mileage of the motor vehicle, the instantaneous fuel consumption, the engine rotating speed, the accumulated running time of the fuel pump and the like, which are acquired in a large amount of high-low temperature and long-mileage road test experiments before the whole vehicle is on the market. Alternatively, the fuel pump life model may also be established based on data acquired in long-term laboratory life experiments prior to batch application of fuel pumps to a finished vehicle.
According to an advantageous embodiment of the method according to the invention, the estimated fuel pump life is calculated by comparing the fuel pressures by means of the following formula:
in the case of comparing fuel pump output flows, a fuel pump life estimate is calculated by the following formula:
and under the condition of comparing the fuel pressure and the output flow of the fuel pump, calculating the service life estimated value of the fuel pump by the following formula:
wherein eta is a normal aging factor of the fuel pump after running for a certain time cumulatively, which is shown in experimental data. As has been previously mentioned, when operating with fuel of poor quality, the fuel pump is subject to premature degradation, and the ratio of actual fuel pressure/fuel pump output flow to estimated fuel pressure/fuel pump output flow is indicative of the magnitude of this abnormal degradation of the fuel pump due to the use of fuel of poor quality. By multiplying by the normal aging factor, the fuel pump life can be estimated. The normal aging factor represents the normal aging degree of the fuel pump after running with high-quality fuel for a certain time in a fuel pump laboratory life experiment or a whole vehicle road test experiment.
According to an advantageous embodiment of the method according to the invention, the method further comprises the following steps: the estimated fuel pump life is communicated to an engine control module or indicated to a driver of the motor vehicle.
According to an advantageous embodiment of the method according to the invention, the method further comprises the following steps: and comparing the life estimation value of the fuel pump with a preset threshold value, and generating and outputting an alarm signal when the life estimation value of the fuel pump is lower than the threshold value. The fuel pump early warning system has the advantages that early warning can be carried out when the service life of the fuel pump is too low, and the occurrence of driving faults is avoided.
Preferably, the threshold value is 5% to 15%, particularly preferably 10%, of the life of the unused new fuel pump.
According to an advantageous embodiment of the method according to the invention, the pump core parameters are recorded by the fuel pump controller in real time during the control of the fuel pump to supply the engine on demand.
According to an advantageous embodiment of the method, the ambient parameter is obtained by information interaction with an engine control module. Preferably, the information interaction is realized through a CAN bus. The information exchange can obviously also be realized by other communication connection modes, such as Bluetooth, WLAN and the like.
According to an advantageous embodiment of the method according to the invention, the cumulative operating time of the fuel pump is obtained by reading the last stored cumulative operating time of the fuel pump. The accumulated fuel pump run time may be stored in a timing module of the fuel pump controller. Alternatively, the cumulative operating time of the fuel pump may also be stored in the engine control module or in the vehicle meter.
According to an advantageous embodiment of the method according to the invention, the actual fuel pressure and/or the actual fuel pump output flow are detected by corresponding sensors, for example a pressure sensor and a flow meter.
According to another aspect of the present invention, the object of the present invention is also achieved by a fuel pump controller for implementing the above-described fuel pump life evaluation method, the fuel pump controller comprising:
-an input module configured to obtain an actual fuel pressure and/or an actual fuel pump output flow and, if necessary, external environmental parameters;
-a timing module configured to accumulate fuel pump run time; and
-an arithmetic processing module configured to be able to acquire a core parameter of a fuel pump, the core parameter comprising a core voltage and/or a core current and/or a core rotational speed; wherein the arithmetic processing module is configured to determine an estimated fuel pressure and/or an estimated output flow of the fuel pump by means of a fuel pump life model on the basis of the cumulative operating time of the fuel pump and the pump core parameters and, if necessary, also external environment parameters, and to compare the estimated fuel pressure and/or the estimated output flow of the fuel pump with the actual fuel pressure and/or the actual output flow of the fuel pump, respectively, to determine an estimated fuel pump life.
In the invention, a fuel pump life model is established in advance based on experimental data, then a model algorithm is applied to a fuel pump controller, the fuel pump controller collects information such as pump core voltage, pump core current, pump core rotating speed and the like of a fuel pump in real time in the running process of the whole vehicle, the running time of the fuel pump is recorded in an accumulated mode, if necessary, the fuel pump controller can communicate with an engine control module, receives information such as fuel temperature, instantaneous fuel consumption, motor vehicle mileage and the like, integrates all effective information, estimates fuel pressure and/or fuel pump output flow by means of the fuel pump life model algorithm, and determines the service life state of the fuel pump by comparing the actual fuel pressure and/or fuel pump output flow.
It is clear that the aforementioned design and further development of the method according to the invention can also be transferred without difficulty to the fuel pump controller according to the invention. Therefore, various designs and modifications of the fuel pump controller of the present invention will not be described herein.
Drawings
The invention is further elucidated below by means of embodiments with reference to the drawing. In the drawings:
fig. 1 shows a schematic view of a low pressure oil supply system for a motor vehicle according to an exemplary embodiment of the present invention.
FIG. 2 shows a schematic diagram of a fuel pump controller according to an exemplary embodiment of the present invention.
FIG. 3 illustrates an exemplary calculation of a fuel pump life estimate.
FIG. 4 illustrates a work flow diagram of a life assessment method for a fuel pump in accordance with an exemplary embodiment of the present invention.
Detailed Description
A method for evaluating the life of a fuel pump and a fuel pump controller for implementing the method according to the present invention will be described below by way of example with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention to those skilled in the art. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. Rather, it is contemplated that the invention may be practiced with any combination of the following features and elements, whether or not they relate to different embodiments. Accordingly, the following methods, features, embodiments and advantages are merely illustrative and are not considered elements or limitations of the claims except where explicitly recited in a claim.
Fig. 1 shows a schematic view of a low-pressure oil supply system for a motor vehicle according to the present invention. The low pressure fuel supply system includes a fuel tank 20 which is driven by a fuel pump 30 to flow into a low pressure line 10 and then to a rail injection system 40 for injection into the engine cylinders, driven by a booster pump or high pressure fuel pump 50. An oil pressure sensor 60 is provided in the lp line 10 to measure the instantaneous fuel pressure in the lp line and generate an actual pressure signal.
The low pressure fuel supply system is also provided with a fuel pump controller 70 which drives a fuel pump as required to supply fuel to the engine end according to engine demand. In addition, the fuel pump controller 70 of the present invention also evaluates the fuel pump life status with the fuel pump life model.
FIG. 2 shows a schematic diagram of an exemplary embodiment of a fuel pump controller 70 according to the present invention for implementing a fuel pump life assessment method according to the present invention. The fuel pump controller 70 includes an input module 71 for acquiring data from outside the fuel pump controller and an output module 77 for outputting the results of the arithmetic processing by the fuel pump controller to outside the fuel pump controller. For example, the input module 71 may be configured to acquire the actual fuel pressure detected by the oil pressure sensor 60 and acquire the fuel pressure required when the engine is supplied on demand, i.e., the required pressure, through data communication with the engine control module 80. The data acquired by the input module 71 is fed to an arithmetic processing module 75 of the fuel pump controller 70.
The fuel pump controller 70 also includes a timing module 73 for accumulating fuel pump run time. The accumulated fuel pump run time may be stored in the timing module 73. The accumulated fuel pump running time may also be stored and/or set by the engine control module or the vehicle meter, allowing for after-market replacement of the fuel pump or fuel pump controller. The accumulated fuel pump running time may be read by the arithmetic processing module 75. When a new fuel pump is mounted on the motor vehicle and is first operated, the cumulative operating time of the fuel pump is set to 0.
The arithmetic processing module 75 may be configured to control the on-demand fuel pump 30 to supply the engine on demand via an on-demand control and acquisition algorithm based on the actual fuel pressure and the demand pressure input by the input module 71, wherein the actual fuel pressure may be detected by the oil pressure sensor 60 and the demand pressure may be obtained in data communication with the engine control module 80. The fuel pump control signal resulting from the on-demand control and acquisition algorithm is transmitted to the fuel pump 30 via the output module 77. The above-described process of controlling the fuel pump to supply the engine on demand is a common function of the fuel pump controller.
The fuel pump controller 70 of the present invention may also be configured for fuel pump life assessment. Therefore, in the above-mentioned engine on-demand supply control process, the arithmetic processing module 75 also collects pump core parameters such as pump core voltage, pump core current, and pump core rotation speed of the fuel pump in real time. In addition, external environmental parameters such as fuel temperature, instantaneous fuel consumption, vehicle mileage, engine speed, etc. can also be obtained from the engine control module 80 via the input module 71 and transmitted to the arithmetic processing module 75.
The arithmetic processing module 75 stores a fuel pump life model in advance. The fuel pump life model can be established by the following method: generally, before fuel pumps are applied to a whole vehicle in batches, a long-period operation verification experiment is needed, a large amount of data can be acquired in the laboratory life experiment process of the fuel pumps, wherein the data comprises information such as accumulated operation time of the fuel pumps, fuel temperature, pump core voltage of the fuel pumps, pump core current, pump core rotating speed, fuel pressure and output flow of the fuel pumps, and a fuel pump life model can be established based on the information.
Alternatively, the fuel pump life model can also be established in a large number of high-low temperature, long-range road test experiments before the whole vehicle is on the market. A large amount of data including information such as fuel temperature, instantaneous fuel consumption, motor vehicle mileage, pump core voltage of the fuel pump, pump core current, pump core rotating speed, fuel pressure, output flow of the fuel pump and the like are obtained in the whole vehicle road test experiments, and a fuel pump service life model can be established based on the information.
That is, the fuel pump life model is essentially a multi-dimensional data look-up table that describes the correspondence between pump core parameters and fuel pressure and/or fuel pump output flow at a determined cumulative fuel pump operating time and, if necessary, at a determined ambient parameter.
The arithmetic processing module 75 is configured to estimate the life state of the fuel pump by means of the fuel pump life model based on the actual fuel pressure and the external environment parameters inputted by the input module 71, the accumulated fuel pump running time read from the timing module 73, and the pump core parameters collected during the engine on-demand supply control, and to feed back the obtained estimated fuel pump life value to the engine control module 80 through the output module 77.
FIG. 3 illustrates one example of calculating a fuel pump life estimate. In this example, fuel pressure is taken as an example. Based on the cumulative operating time of the fuel pump and the external environmental parameters, in particular the fuel temperature or additionally the instantaneous fuel consumption, the mileage of the motor vehicle, the engine speed, the fuel pressure corresponding to the pump core parameters, i.e. the estimated fuel pressure, is determined from the pump core parameters (pump core voltage, pump core current and pump core speed) of the fuel pump in a multidimensional data lookup table from a fuel pump life model, and this estimated fuel pressure is compared with the actual fuel pressure obtained from the oil pressure sensor 60. For example, a difference between the estimated fuel pressure and the actual fuel pressure, or a ratio of the difference to the estimated fuel pressure may be determined. In a simple manner, the quotient of the actual fuel pressure and the estimated fuel pressure is determined in a divider and multiplied by a normal aging factor η of the fuel pump under the conditions of the accumulated operating time and the external environmental parameters to obtain an estimated fuel pump life, namely:
it is noted herein that instead of or in addition to fuel pressure, fuel pump output flow may also be used to evaluate the calculated fuel pump life status. The actual fuel pump output flow is then accordingly obtained via the input module 77 of the fuel pump controller, for example from a flow meter.
In an advantageous embodiment, the arithmetic processing module 75 is further configured to compare the estimated fuel pump life with a set threshold and to generate and output an alarm signal to prompt the driver to replace the fuel pump if the estimated fuel pump life is below the set threshold. The set threshold may be, for example, 5% -15%, preferably 10%, of the life of the unused new fuel pump.
Obviously, the fuel pump life evaluation process described above may also be implemented by an arithmetic processing module other than the arithmetic processing module 75.
Data communication between the oil pressure sensor 60, the fuel pump 30, and the engine control module 80 and the input and output modules 71, 77 of the fuel pump controller 70 may be performed, for example, via a CAN bus or other communication link (e.g., Bluetooth, WLAN, etc.).
The fuel pump controller 70 may be provided as a control unit dedicated to the low pressure fuel supply system, or a running computer of the motor vehicle may be used. As a prior art, a vehicle computer is used to control the driving of a motor vehicle and may be formed, for example, by at least one Electronic Control Unit (ECU). The electronic control unit comprises, for example, more than one processor and more than one memory, and may further comprise other electronic circuits, such as circuits dedicated to controlling the fuel pump or the booster pump.
Although it has been described above that the external environmental parameters such as fuel temperature, instantaneous fuel consumption, vehicle mileage, engine speed, etc. may be obtained from the engine control module, these external environmental parameters may also be detected by vehicle sensors at or outside of the fuel pump controller.
FIG. 4 illustrates a flow chart of an exemplary embodiment of a fuel pump life assessment method according to the present invention. The steps of implementing the fuel pump life assessment method will be described in detail below with reference to FIG. 4.
First, in step S101, the fuel pump is electrically operated, and the method is started.
Next, in step S102, initialization is performed in which the last estimated fuel pump life and the accumulated fuel pump operating time are read. If the fuel pump is an unused new pump, the cumulative operating time of the fuel pump is set to zero and the estimated fuel pump life is 100%.
Then, in step S103, a pump core parameter of the fuel pump and, if necessary, an external environment parameter, in particular, a fuel temperature, are acquired. The pump core parameters may include, for example, pump core voltage, pump core current, pump core rotational speed, and the like. The external environmental parameters may include, for example, vehicle mileage, instantaneous fuel consumption, engine speed, etc., in addition to the fuel temperature. Preferably, the pump core parameters are detected by the fuel pump controller in real time during the on-demand control. The external environment parameters CAN be obtained by communicating with the engine control module through the CAN bus. Of course, the ambient parameter can also be detected directly by a corresponding sensor of the fuel pump controller or in the motor vehicle.
In step S103, the fuel pump operating time is also accumulated.
In step S104, a life state of the fuel pump is evaluated by means of a fuel pump life model according to the fuel pump core parameter, the fuel pump accumulated running time and the external environment parameter. As described previously, fuel pump life models have been obtained based on experimental data, whether from fuel pump laboratory life experiments or from full vehicle road test experiments. The fuel pump life model is a multi-dimensional data lookup table describing the relationship between pump core voltage, pump core current, pump core rotation speed and fuel pressure or output flow of the fuel pump under the conditions of accumulated running time of each fuel pump, fuel temperature, motor vehicle mileage, instantaneous fuel consumption, engine rotation speed and the like. For example, in one simple example, by substituting the cumulative fuel pump operating time, fuel temperature, core voltage, core current, and core speed as inputs into a fuel pump life model, the corresponding fuel pressure can be found or estimated. By comparing the actual fuel pressure obtained with the estimated fuel pressure, an estimated fuel pump life can be obtained.
The estimated fuel pump life is output in step S105. For example, the estimated fuel pump life may be fed back to the engine control module or output to a display device of the vehicle.
Next, the fuel pump life estimate is compared to a predetermined threshold in step S106. The threshold value may be, for example, 5-15%, preferably 10%, of the life of the unused new fuel pump.
If the estimated fuel pump life is higher than the threshold value and the fuel pump continues to operate, i.e., the method is not yet finished, the above steps S103 to S106 are repeated to continue evaluating the life of the fuel pump. The fuel pump life assessment method may be performed continuously at regular time intervals during on-demand control of the fuel pump.
If the estimated fuel pump life is below the threshold, step S107 is performed, in which step S107 an alarm signal of low fuel pump life is generated and output, and the method is ended in step S108. In step S108, the accumulated operating time of the fuel pump and the last estimated life of the fuel pump are stored before the end of the power-off of the fuel pump.
Of course, it is also possible to end the method at the driver' S discretion if the fuel pump life estimate is above the threshold after the comparison in step S106. For example, after step S106, when the fuel pump is to be de-energized because, for example, the destination is reached, step S108 is skipped instead of continuing with step S103.
In the present invention, it will be appreciated by those skilled in the art that the method need not be implemented in a fuel pump controller, but may be implemented in other control devices in a motor vehicle.
In addition, in the present invention, it can be understood by those skilled in the art that the disclosed fuel pump controller can be implemented in other ways. For example, the above-described embodiment of the fuel pump controller is merely illustrative, for example, the division of the modules is only one logical functional division, and there may be other divisions when the actual implementation is performed, for example, the functions of a plurality of modules may be combined or the function of a certain module may be further split. The input module, the output module, the timing module, the storage module, the operation processing module and the like in the fuel pump controller can be integrated in one processing unit, or each module can exist independently and physically, or two or more modules can be integrated in one unit. The integrated module can be realized in a form of hardware, a form of a software functional unit, or a form of a combination of software and hardware.
When the integrated unit is implemented in the form of a hardware functional unit, each module is circuit-level hardware which uses hardware logic to implement a specific function, and the connection relationship between each piece of hardware is an explicit hardware connection relationship. The invention realizes the network connection with the upper computer and the electric connection among all modules by utilizing the hardware, and completes the signal transmission and processing operation.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) or a processor or a microcontroller to execute all or part of the steps of the method according to the embodiments of the present invention.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; the storage medium includes various media that can store program codes, such as ROM, RAM, magnetic or optical disk. In the embodiments of the methods of the present invention, the sequence numbers of the steps are not used to limit the sequence of the steps, and for those skilled in the art, the sequence of the steps is not changed without creative efforts.
Although the present invention has been described with reference to the preferred embodiments, it is not to be limited thereto. Various changes and modifications within the spirit and scope of the present invention will become apparent to those skilled in the art from this disclosure, and it is intended that the scope of the present invention be defined by the appended claims.
Claims (12)
1. A method for assessing fuel pump life in an automotive vehicle, the method comprising:
-obtaining a cumulative fuel pump running time;
-obtaining an actual fuel pressure and/or an actual fuel pump output flow;
acquiring pump core parameters of the fuel pump, wherein the pump core parameters comprise pump core voltage and/or pump core current and/or pump core rotating speed,
-determining an estimated fuel pressure and/or an estimated fuel pump output flow by means of a fuel pump life model on the basis of a fuel pump accumulated running time and a pump core parameter,
-comparing the estimated fuel pressure and/or estimated fuel pump output flow with the actual fuel pressure and/or actual fuel pump output flow, respectively, to determine a fuel pump life estimate.
2. The method of claim 1, further comprising the steps of:
-obtaining an ambient environment parameter,
the external environment parameters are also taken into account when estimating the fuel pressure and/or the fuel pump output flow by means of a fuel pump life model.
3. Method according to claim 2, characterized in that the external environmental parameter is preferably the fuel temperature, particularly preferably the external environmental parameter additionally comprises one or more of the vehicle mileage, the instantaneous fuel consumption and the engine speed in addition to the fuel temperature.
4. A method according to any one of claims 1 to 3, characterized in that the fuel pump life model is a multidimensional data look-up table based on experimental data, which multidimensional data look-up table describes the correspondence between the pump core parameters and the fuel pressure and the output flow of the fuel pump for the respective accumulated operating time of the fuel pump and in particular for ambient parameters.
5. The method of any of claims 1-4, wherein the fuel pump life estimate is calculated according to a respective one of the following equations:
wherein eta is a normal aging factor obtained from the fuel pump life model after the fuel pump is operated for a certain time in an accumulated mode.
6. A method according to any one of claims 1 to 5, characterized in that the method further comprises the steps of: the estimated fuel pump life is communicated to an engine control module or indicated to a driver of the motor vehicle.
7. The method according to any one of claims 1 to 6, characterized in that the method further comprises the steps of: and comparing the life estimation value of the fuel pump with a preset threshold value, and generating and outputting an alarm signal when the life estimation value of the fuel pump is lower than the threshold value.
8. The method of claim 7, wherein the threshold is 5-15%, preferably 10%, of the life of the unused new fuel pump.
9. The method of any of claims 1-8, wherein the pump core parameters are collected by a fuel pump controller during control of a fuel pump on demand to an engine.
10. The method according to any one of claims 2 to 9, wherein the ambient parameter is derived by information interaction with an engine control module.
11. The method of claim 10, wherein the information interaction is implemented via a CAN bus.
12. A fuel pump controller for implementing the fuel pump life assessment method of any one of claims 1 to 11, the fuel pump controller comprising:
-an input module (71) configured to obtain an actual fuel pressure and/or an actual fuel pump output flow and, if necessary, external environmental parameters;
-a timing module (73) configured to accumulate fuel pump run time; and
-an arithmetic processing module (75) configured to be able to acquire a pump core parameter of the fuel pump, the pump core parameter comprising a pump core voltage and/or a pump core current and/or a pump core rotational speed;
it is characterized in that the preparation method is characterized in that,
the arithmetic processing module is configured to determine an estimated fuel pressure and/or an estimated output flow of the fuel pump by means of a fuel pump life model on the basis of the cumulative operating time of the fuel pump and the pump core parameters and, if necessary, also external environment parameters, and to compare the estimated fuel pressure and/or the estimated output flow of the fuel pump with the actual fuel pressure and/or the actual output flow of the fuel pump, respectively, to determine an estimated fuel pump life.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117006035A (en) * | 2023-08-07 | 2023-11-07 | 安徽中恒电喷系统有限公司 | Internet-based comprehensive performance monitoring system for automobile fuel pump core |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107403279A (en) * | 2017-08-02 | 2017-11-28 | 中国石油大学(北京) | A kind of adaptive status early warning system and method for oil transportation pump condition |
| US20180045122A1 (en) * | 2016-08-15 | 2018-02-15 | Hamilton Sundstrand Corporation | Fuel pump health detection |
| CN108678938A (en) * | 2018-05-09 | 2018-10-19 | 中国人民解放军空军工程大学 | Fuel On Board pumps performance degradation test method |
| CN109142188A (en) * | 2018-09-12 | 2019-01-04 | 重庆宗申创新技术研究院有限公司 | A kind of oil pump filter screen life detecting device and detection method |
| CN109386416A (en) * | 2017-08-02 | 2019-02-26 | 大陆汽车电子(芜湖)有限公司 | Dry operating diagnostic system and method for fuel pump |
| CN111196268A (en) * | 2018-11-19 | 2020-05-26 | 丰田自动车株式会社 | Electric oil pump system and control method of electric oil pump |
-
2020
- 2020-07-27 CN CN202010729993.1A patent/CN113982771B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180045122A1 (en) * | 2016-08-15 | 2018-02-15 | Hamilton Sundstrand Corporation | Fuel pump health detection |
| CN107403279A (en) * | 2017-08-02 | 2017-11-28 | 中国石油大学(北京) | A kind of adaptive status early warning system and method for oil transportation pump condition |
| CN109386416A (en) * | 2017-08-02 | 2019-02-26 | 大陆汽车电子(芜湖)有限公司 | Dry operating diagnostic system and method for fuel pump |
| CN108678938A (en) * | 2018-05-09 | 2018-10-19 | 中国人民解放军空军工程大学 | Fuel On Board pumps performance degradation test method |
| CN109142188A (en) * | 2018-09-12 | 2019-01-04 | 重庆宗申创新技术研究院有限公司 | A kind of oil pump filter screen life detecting device and detection method |
| CN111196268A (en) * | 2018-11-19 | 2020-05-26 | 丰田自动车株式会社 | Electric oil pump system and control method of electric oil pump |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117006035A (en) * | 2023-08-07 | 2023-11-07 | 安徽中恒电喷系统有限公司 | Internet-based comprehensive performance monitoring system for automobile fuel pump core |
| CN117006035B (en) * | 2023-08-07 | 2024-02-13 | 安徽中恒电喷系统有限公司 | Internet-based comprehensive performance monitoring system for automobile fuel pump core |
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