CN113982771B - Fuel pump life assessment method and fuel pump controller thereof - Google Patents
Fuel pump life assessment method and fuel pump controller thereof Download PDFInfo
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- CN113982771B CN113982771B CN202010729993.1A CN202010729993A CN113982771B CN 113982771 B CN113982771 B CN 113982771B CN 202010729993 A CN202010729993 A CN 202010729993A CN 113982771 B CN113982771 B CN 113982771B
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- 239000000446 fuel Substances 0.000 title claims abstract description 425
- 238000000034 method Methods 0.000 title claims abstract description 62
- 230000007613 environmental effect Effects 0.000 claims description 21
- 238000012545 processing Methods 0.000 claims description 19
- 230000001186 cumulative effect Effects 0.000 claims description 17
- 230000032683 aging Effects 0.000 claims description 9
- 230000003993 interaction Effects 0.000 claims description 4
- 238000002474 experimental method Methods 0.000 description 8
- 239000003921 oil Substances 0.000 description 8
- 238000004891 communication Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 4
- 206010039203 Road traffic accident Diseases 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000012854 evaluation process Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
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- 239000002245 particle Substances 0.000 description 1
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- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
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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
-
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention relates to a method for assessing fuel pump life, comprising: acquiring accumulated operation time of the fuel pump; acquiring actual fuel pressure and/or actual fuel pump output flow; obtaining a pump core parameter comprising a pump core voltage and/or a pump core current and/or a pump core rotational speed; the external environment parameters, preferably the fuel temperature, are acquired if necessary, particularly preferably also the vehicle mileage and/or the instantaneous fuel consumption and/or the engine speed; determining an estimated fuel pressure and/or fuel pump output flow by means of a fuel pump life model according to the acquired fuel pump accumulated operating time and pump core parameters and, if necessary, external environment parameters; 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 a fuel pump life estimate. The invention also relates to a fuel pump controller for carrying out the method.
Description
Technical Field
The invention relates to a fuel pump life assessment method and a fuel pump controller thereof.
Background
At present, the motor vehicle and people cannot be separated in a dense way. The fuel pump is used as the heart of the whole vehicle, and fuel oil needs to be supplied to the engine according to the requirement in time, so that the normal running of the whole vehicle is ensured. However, at present, various fuels in the market are uneven in quality, most of the fuels generally contain moisture, sulfur, particles with different sizes and the like, and the fuel pump, particularly a 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 prone to traffic accidents when the vehicle is traveling at high speeds. Existing fuel pump controllers, and even fuel supply systems, are unable to recognize such abnormal aging of the fuel pump and take precautions in advance when the fuel pump life is too low.
Disclosure of Invention
The invention aims to fill the market blank of the fuel pump service life assessment function, provides a fuel pump service life assessment method, is applied to fuel pump control, monitors and assesses the fuel pump service life state 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 an aspect of the present invention, in the fuel pump life evaluation method of the present invention, the method includes the steps of:
-obtaining a fuel pump accumulated operating time;
-obtaining an actual fuel pressure and/or an actual fuel pump output flow;
-obtaining 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;
-determining an estimated fuel pressure and/or an estimated fuel pump output flow by means of a fuel pump life model based on the fuel pump accumulated run time and the pump core parameters;
-comparing the estimated fuel pressure and/or the estimated fuel pump output flow with the actual fuel pressure and/or the actual fuel pump output flow, respectively, to determine a fuel pump life estimate.
The fuel pump is used as a core and a power source of a low-pressure system, and the most important function is to output the fuel injection quantity required by an engine, so that the output flow of the fuel pump is a very important and direct parameter index of the fuel pump. During normal operation and aging of the fuel pump, the fuel pump output flow rate may be reduced to some extent under the same conditions, i.e., the same pumping core voltage, fuel supply pressure, or pumping core speed. The fuel pump life status can be estimated by estimating the fuel pump output flow information from the fuel pump life model and comparing it to the actual output flow. However, the whole vehicle system generally does not have actual output flow data as a reference, so that a flowmeter needs to be additionally installed at a proper position of the motor vehicle to detect the actual output flow. Alternatively, fuel pressure may be used in place of fuel pump output flow to evaluate fuel pump life status. The actual fuel pressure is detected in the process of controlling the fuel pump to supply the engine on demand, and the fuel pressure can be estimated by the fuel pump life model, so that the comparison of the fuel pressures is easy to realize.
In the present invention, a fuel pump life model is established in advance, which describes the correspondence between the fuel pump parameters, i.e. the pump voltage, the pump current and the pump speed, of the fuel pump and the fuel pressure and/or the fuel pump output flow, in the case of the fuel pump cumulative operating time (and if appropriate also the external environmental parameters, in particular the fuel temperature). Based on the fuel pump cumulative operating time (and, if necessary, external environmental parameters) and the pump core parameters, an estimated fuel pressure and/or fuel pump output flow may be determined from the fuel pump life model, and by comparing the estimated fuel pressure and/or fuel pump output flow to the actual fuel pressure and/or fuel pump output flow, a fuel pump life estimate may be determined. The fuel pump life assessment method has the advantages that the fuel pump life assessment method is provided for the first time, and the fuel pump life can be estimated, so that driving safety is improved.
When there is a fuel pump life estimate from both fuel pressure and fuel pump output flow, both can also be checked for reliability with respect to each other, thereby avoiding errors due to, for example, oil pressure sensor or flow meter failure, and further improving safety.
An advantageous embodiment of the method according to the invention further comprises the following steps:
-obtaining an external environmental parameter of the vehicle,
-also taking into account external environmental parameters when estimating the fuel pressure and/or the fuel pump output flow by means of the fuel pump life model.
The ambient parameter is preferably the fuel temperature. Particularly preferably, the external environmental parameter comprises, in addition to the fuel temperature, one or more of the vehicle range, the instantaneous fuel consumption and the engine speed. In other words, in the estimation of 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 taken into account.
In general, the fuel temperature has a greater impact on the fuel pressure and output flow from the fuel pump, and by taking into account the impact of the fuel temperature in the fuel pump life model, the fuel pump life model is more accurate, thereby enabling more accurate estimation of the fuel pressure and/or fuel pump output flow and thus the fuel pump life. Of course, if more external environmental parameters are considered, such as vehicle mileage, instantaneous fuel consumption, engine speed, etc., the estimated fuel pump life is more accurate.
According to an advantageous embodiment of the method according to the invention, the fuel pump life model is a multidimensional data lookup table which is established on the basis of experimental data and describes the correspondence between the pump core parameters and the fuel pressure and the fuel pump output flow under the conditions of the respective fuel pump cumulative operating time and in particular the external environment parameters. Preferably, the fuel pump life model may be built based on a large amount of data concerning fuel pump core voltage, core current, core speed, fuel pressure, fuel pump output flow, fuel temperature, vehicle mileage, instantaneous fuel consumption, engine speed, fuel pump cumulative operating time, etc., obtained in a large amount of high and low temperature, long mileage road test experiments prior to the entire vehicle being marketed. Alternatively, the fuel pump life model may also be built based on data acquired in a long-cycle laboratory life experiment before the fuel pump is mass-applied to the whole vehicle.
According to an advantageous embodiment of the method according to the invention, the fuel pump life estimate is calculated by the following formula when comparing the fuel pressures:
in the case of comparing fuel pump output flows, a fuel pump life estimate is calculated by the following formula:
in the case of comparing both fuel pressure and fuel pump output flow, the fuel pump life estimate is calculated by the following equation:
wherein eta is a normal aging factor of the fuel pump after running for a certain time in the accumulated mode. As already stated above, when operating with poor quality fuel, the fuel pump ages in advance, and the ratio of actual fuel pressure/fuel pump output flow to estimated fuel pressure/fuel pump output flow represents the magnitude of this abnormal degradation of the fuel pump due to the use of poor quality fuel. The fuel pump life is estimated by multiplication with a normal aging factor. The normal aging factor reflects the normal aging degree of the fuel pump after running for a certain time in a cumulative way when the fuel pump runs 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 fuel pump life estimate is communicated to an engine control module or indicated to a driver of the vehicle.
According to an advantageous embodiment of the method according to the invention, the method further comprises the following steps: the fuel pump life estimate is compared to a pre-set threshold and an alarm signal is generated and output when the fuel pump life estimate is below the threshold. The fuel pump has the advantages that early warning can be carried out in advance when the service life of the fuel pump is too short, and driving faults are avoided.
Preferably, the threshold value is 5% to 15%, particularly preferably 10%, of the lifetime of the unused new fuel pump.
According to an advantageous embodiment of the method according to the invention, the pump core parameters are recorded in real time by the fuel pump controller during the control of the fuel pump on demand to the engine.
According to an advantageous embodiment of the method according to the invention, the external environment parameter is obtained by information interaction with the engine control module. Preferably, the information interaction is realized through a CAN bus. The information exchange can obviously also be realized by other communication connections, such as bluetooth, WLAN, etc.
According to an advantageous embodiment of the method according to the invention, the fuel pump integration operating time is obtained by reading the last stored fuel pump integration operating time. The fuel pump accumulated operating time may be stored in a timing module of the fuel pump controller. Alternatively, the fuel pump accumulated operating time 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 pressure sensors and flow meters.
According to another aspect of the present invention, the object is also achieved by a fuel pump controller for implementing the above fuel pump life assessment method, the fuel pump controller comprising:
-an input module configured to be able to obtain an actual fuel pressure and/or an actual fuel pump output flow, and if necessary also an external environmental parameter;
-a timing module configured to accumulate fuel pump operating time; and
-an arithmetic processing module 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; wherein the arithmetic processing module is configured to determine an estimated fuel pressure and/or an estimated fuel pump output flow by means of the fuel pump life model on the basis of the fuel pump cumulative operating time and the pump core parameters and, if appropriate, also the external environment parameters, and to correspondingly compare the estimated fuel pressure and/or the estimated fuel pump output flow with the actual fuel pressure and/or the actual fuel pump output flow, and to determine the fuel pump life estimate.
In the invention, a fuel pump life model is established based on experimental data in advance, then the model algorithm is applied to a fuel pump controller, the fuel pump controller collects information such as the pump core voltage, the pump core current, the pump core rotating speed and the like of a fuel pump in real time in the whole vehicle driving process, the running time of the fuel pump is accumulated and recorded, the fuel pump can be communicated with an engine control module when necessary, the information such as the fuel temperature, the instantaneous fuel consumption, the motor vehicle mileage and the like is received, all effective information is integrated, the fuel pressure and/or the fuel pump output flow are estimated by means of the fuel pump life model algorithm, and the fuel pump life state is determined by comparing the actual fuel pressure and/or the fuel pump output flow.
It is obvious that the above-described design and development of the method according to the invention can also be transferred without difficulty to the fuel pump controller according to the invention. Accordingly, the various designs and improvements of the fuel pump controller of the present invention are not described in detail herein.
Drawings
The invention is further elucidated below by means of examples with reference to the accompanying drawings. 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 invention.
Fig. 2 shows a schematic diagram of a fuel pump controller according to an exemplary embodiment of the invention.
FIG. 3 illustrates an exemplary method of calculating a fuel pump life estimate.
Fig. 4 shows a flowchart of a life assessment method for a fuel pump according to 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 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, the invention can be considered to be implemented with any combination of the following features and elements, whether or not they relate to different embodiments. Thus, the following methods, features, embodiments, and advantages are merely illustrative and should not be considered elements or limitations of the claims except where explicitly set out in a claim.
Fig. 1 shows a schematic view of a low-pressure oil supply system for a motor vehicle according to the invention. The low pressure fuel supply system includes a fuel tank 20 in which fuel flows into a low pressure line 10 under the drive of a fuel pump 30 and then into a rail injection system 40 under the drive of a booster pump or a high pressure fuel pump 50 to be injected into the engine cylinder. An oil pressure sensor 60 is provided in the low pressure line 10 to measure the instantaneous fuel pressure in the low pressure line and to generate an actual pressure signal.
The low pressure fuel supply system is also provided with a fuel pump controller 70 that drives the fuel pump as needed to supply fuel to the engine end according to engine demand. In addition, the fuel pump controller 70 of the present invention also evaluates fuel pump life status via a 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 operation processing result of the fuel pump controller to outside the fuel pump controller. For example, the input module 71 may be configured to obtain the actual fuel pressure detected by the oil pressure sensor 60 and to obtain the fuel pressure required when the engine is supplied on demand, i.e., the demand pressure, through data communication with the engine control module 80. The data acquired by the input module 71 is supplied to the 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 operating time. The fuel pump accumulated operating time may be stored in the timing module 73. The fuel pump accumulated operating time may also be stored and/or set by the engine control module or vehicle instrumentation to allow for after-market replacement of the fuel pump or fuel pump controller. The fuel pump accumulated operating time may be read by the arithmetic processing module 75. The fuel pump cumulative operating time is set to 0 when a new fuel pump is installed on the motor vehicle and is operated for the first time.
The operation processing module 75 may be configured to control the fuel pump 30 to supply the engine on demand via a supply-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 an 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 to perform fuel pump life assessment. For this reason, in the above-described engine on-demand control process, the operation processing module 75 also collects pump core parameters such as the pump core voltage, the pump core current, the pump core rotation speed, etc. of the fuel pump in real time. In addition, external environmental parameters such as fuel temperature, instantaneous fuel consumption, vehicle mileage, engine speed, etc. may also be obtained from the engine control module 80 via the input module 71 and transmitted to the arithmetic processing module 75.
The fuel pump life model is stored in advance in the arithmetic processing module 75. The fuel pump life model may be established using the following method: in general, a long period of operation verification experiments are required before the fuel pump is applied to the whole vehicle in batches, a large amount of data including information such as accumulated operation time of the fuel pump, fuel temperature, pump core voltage, pump core current, pump core rotating speed, fuel pressure and fuel pump output flow of the fuel pump can be acquired in the laboratory life experiment process of the fuel pump, and a fuel pump life model can be established based on the information.
Alternatively, the fuel pump life model may be built in a large number of high and low temperature, long mileage pilot experiments prior to the entire vehicle being marketed. And acquiring a large amount of data in the whole vehicle road test experiments, wherein the data comprise information such as fuel temperature, instantaneous fuel consumption, motor vehicle mileage, pump core voltage of a fuel pump, pump core current, pump core rotating speed, fuel pressure, output flow of a fuel pump and the like, and a fuel pump life model can be established based on the information.
That is, the fuel pump life model is essentially a multidimensional data lookup table that describes the correspondence between the pump core parameter and the fuel pressure and/or the fuel pump output flow at a defined fuel pump cumulative operating time and, if necessary, at defined ambient parameters.
The arithmetic processing module 75 is configured to evaluate the state of life of the fuel pump by means of the fuel pump life model based on the actual fuel pressure and external environmental parameters input by the input module 71, the fuel pump cumulative operating time read from the timing module 73, and the pump core parameters acquired during the on-demand engine control, and to feed back the resulting fuel pump life estimate to the engine control module 80 via 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 fuel pump integrated operating time and external environmental parameters, in particular the fuel temperature or additionally the instantaneous fuel consumption, the motor vehicle mileage, the engine speed, the fuel pressure corresponding to the pump core parameters (pump core voltage, pump core current and pump core speed) is found out in a fuel pump life model in the form of a multidimensional data lookup table, i.e. the estimated fuel pressure is then compared with the actual fuel pressure obtained from the oil pressure sensor 60. For example, the difference between the estimated fuel pressure and the actual fuel pressure, or the ratio of the difference to the estimated fuel pressure, may be found. In a simple manner, the actual fuel pressure and the estimated fuel pressure are divided in a divider and multiplied by the normal aging factor η of the fuel pump under the conditions of the accumulated operating time and the external environmental parameters to obtain a fuel pump life estimate, namely:
it is noted herein that fuel pump output flow may also be used to evaluate the calculated fuel pump life status in place of or in addition to fuel pressure. The actual fuel pump output flow is then correspondingly acquired, for example from a flow meter, via the fuel pump controller input module 77.
In an advantageous embodiment, the arithmetic processing module 75 is further configured to compare the fuel pump life estimate with a set threshold value and to generate and output an alarm signal to prompt the driver to replace the fuel pump when the fuel pump life estimate falls below the set threshold value. The threshold value set may be, for example, 5% -15%, preferably 10% of the life of the unused new fuel pump.
It is apparent that the fuel pump life evaluation process described above may be implemented by an arithmetic processing module other than the arithmetic processing module 75.
The 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 connection (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 driving computer of the motor vehicle may be used. As a prior art, a driving computer is used for controlling the driving of a motor vehicle, and may be formed, for example, by at least one Electronic Control Unit (ECU). The electronic control unit, for example, contains more than one processor and more than one memory, and may further include other electronic circuitry, such as circuitry dedicated to controlling the fuel pump or 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 of or external to the fuel pump controller.
FIG. 4 illustrates a flowchart of an exemplary embodiment of a fuel pump life assessment method according to the present invention. The respective steps of implementing the fuel pump life evaluation method will be described in detail with reference to fig. 4.
First, in step S101, the fuel pump is powered on, and the method is started.
Next, in step S102, initialization is performed in which the last fuel pump life estimation value and the fuel pump cumulative operation time are read. If the fuel pump is a new unused pump, the fuel pump cumulative operating time is set to zero and the fuel pump life estimate is 100%.
Then, in step S103, the pump core parameters of the fuel pump and, if necessary, the ambient parameters, in particular the fuel temperature, are acquired. The wick parameters may include, for example, wick voltage, wick current, wick rotational speed, etc. 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 implementation of the on-demand supply control. The external environment parameters CAN be obtained through communication of the CAN bus and the engine control module. Of course, the external environmental 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 operation time is also accumulated.
In step S104, the state of life of the fuel pump is evaluated by means of a fuel pump life model, based on the fuel pump core parameters, the fuel pump integrated operating time and the external environment parameters. As described previously, the fuel pump life model has been obtained based on experimental data, whether a fuel pump laboratory life test or a complete vehicle road test. The fuel pump life model is a multidimensional data lookup table that describes the relationship between the pump core voltage, the pump core current, the pump core speed and the fuel pressure or the fuel pump output flow under the conditions of the accumulated operating time, the fuel temperature, the motor vehicle mileage, the instantaneous fuel consumption, the engine speed and the like of each fuel pump. For example, in a simple example, by substituting the fuel pump cumulative operating time, fuel temperature, pump core voltage, pump core current, pump core speed as input to the fuel pump life model, the corresponding fuel pressure may be found or estimated. By comparing the actual fuel pressure obtained with the estimated fuel pressure, a fuel pump life estimate may be obtained.
The fuel pump life estimate is output in step S105. The fuel pump life estimate may be fed back to the engine control module, for example, or output to a display device of the vehicle.
Next, the fuel pump life estimate is compared with a preset threshold in step S106. The threshold may be, for example, 5-15%, preferably 10%, of the life of the unused new fuel pump.
If the fuel pump life estimate is above the threshold and the fuel pump continues to operate, i.e., the method has not yet ended, the above steps S103 through S106 are repeated, continuing to evaluate the life of the fuel pump. The fuel pump life assessment method may be performed continuously at regular time intervals during on-demand fuel pump control.
If the fuel pump life estimate is below the threshold, step S107 is performed, an alarm signal that the fuel pump life is too low is generated and output in step S107, and the method ends 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 fuel pump is powered down.
Of course, after the comparison in step S106, it is also possible to end the method according to the driver' S intention in the case where the fuel pump life estimated value is higher than the threshold value. For example, after step S106, when the fuel pump is to be deenergized because, for example, the destination is reached, step S103 is not continued, but step S108 is skipped.
In the present invention, it will be appreciated by those of ordinary skill in the art that the method need not necessarily be implemented in a fuel pump controller, but may be implemented in other control devices in a motor vehicle.
In addition, those of ordinary skill in the art will appreciate that the disclosed fuel pump controller may be implemented in other ways. For example, the above-described embodiments of the fuel pump controller are merely illustrative, e.g., the division of the modules is merely a logical division of functionality, and there may be additional divisions of the actual implementation, e.g., the functionality of multiple modules may be combined or the functionality of a 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 the modules can exist independently and physically, or two or more modules can be integrated in one unit. The integrated modules 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.
If implemented in the form of hardware functional units, the integrated units are circuit-level hardware that implements a specific function using hardware logic, and the connection between the individual hardware is an explicit hardware connection. The invention utilizes the hardware to realize network connection with the upper computer and electric connection between the modules, and completes signal transmission and processing operation.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on this understanding, the technical solution of the present invention may be embodied essentially or in part or all or part of the technical solution contributing to the prior art or in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor or a microcontroller to perform 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 appreciate that: all or part of the steps for implementing the above method embodiments may be performed by hardware associated with program instructions. The foregoing program may be stored in a computer readable storage medium. The program, when executed, performs steps including the method embodiments described above; the storage medium includes various media capable of storing program codes such as ROM, RAM, magnetic disk or optical disk. In the method embodiments of the present invention, the serial numbers of the steps are not used to define the sequence of the steps, and it is within the scope of the present invention for those skilled in the art to change the sequence of the steps without performing any creative effort.
While the invention has been described in terms of preferred embodiments, the invention is not limited thereto. Any person skilled in the art shall not depart from the spirit and scope of the present invention and shall accordingly fall within the scope of the invention as defined by the appended claims.
Claims (16)
1. A method for assessing fuel pump life in a motor vehicle, the method comprising:
-obtaining a fuel pump accumulated operating time;
-obtaining an actual fuel pressure and/or an actual fuel pump output flow;
acquiring 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,
determining an estimated fuel pressure and/or an estimated fuel pump output flow by means of a fuel pump life model based on the fuel pump cumulative operating time and the pump core parameters, wherein the fuel pump life model describes the correspondence between the pump core parameters and the fuel pressure, the fuel pump output flow under the conditions of the respective fuel pump cumulative operating time,
determining a fuel pump life estimate by comparing the estimated fuel pressure and/or the estimated fuel pump output flow with the actual fuel pressure and/or the actual fuel pump output flow, respectively,
the fuel pump life estimate is calculated according to a corresponding one of the following formulas:
wherein eta is a normal aging factor of the fuel pump obtained from the fuel pump life model after the fuel pump is operated for a certain period of time in an accumulated manner.
2. The method according to claim 1, characterized in that the method further comprises the step of:
-obtaining an external environmental parameter of the vehicle,
-also taking into account external environmental parameters when estimating the fuel pressure and/or the fuel pump output flow by means of the fuel pump life model.
3. The method of claim 2, wherein the ambient parameter is fuel temperature.
4. A method according to claim 3, wherein the ambient parameters additionally comprise one or more of vehicle mileage, instantaneous fuel consumption and engine speed in addition to fuel temperature.
5. The method of any one of claims 2 to 4 wherein the fuel pump life model describes the correspondence between the pump core parameter and the fuel pressure, fuel pump output flow rate for each fuel pump cumulative operating time and external environmental parameter.
6. The method of any of claims 1 to 4, wherein the fuel pump life model is a multi-dimensional data look-up table established based on experimental data.
7. The method according to any one of claims 1 to 4, further comprising the step of: the fuel pump life estimate is communicated to an engine control module or indicated to a driver of the vehicle.
8. The method according to any one of claims 1 to 4, further comprising the step of: the fuel pump life estimate is compared to a pre-set threshold and an alarm signal is generated and output when the fuel pump life estimate is below the threshold.
9. The method of claim 8, wherein the threshold is 5% -15% of the unused new fuel pump life.
10. The method of claim 9, wherein the threshold is 10% of an unused new fuel pump life.
11. The method of any one of claims 1 to 4, wherein the pump core parameters are collected by a fuel pump controller during control of a fuel pump on demand engine.
12. The method according to any one of claims 2 to 4, wherein the external environmental parameter is obtained by information interaction with an engine control module.
13. The method of claim 12, wherein the information interaction is implemented via a CAN bus.
14. A fuel pump controller for implementing the method of assessing fuel pump life of any one of claims 1 to 13, the fuel pump controller comprising:
-an input module (71) configured to obtain an actual fuel pressure and/or an actual fuel pump output flow;
-a timing module (73) configured to accumulate fuel pump operation 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 method comprises the steps of,
the arithmetic processing module is configured to determine an estimated fuel pressure and/or an estimated fuel pump output flow based on the fuel pump cumulative operating time and the pump core parameters by means of a fuel pump life model and to compare the estimated fuel pressure and/or the estimated fuel pump output flow to the actual fuel pressure and/or the actual fuel pump output flow, respectively, to determine a fuel pump life estimate,
wherein the fuel pump life model describes the correspondence between the pump core parameters and the fuel pressure and the fuel pump output flow under the condition of accumulated operation time of each fuel pump,
the fuel pump life estimate is calculated according to a corresponding one of the following formulas:
wherein eta is a normal aging factor of the fuel pump obtained from the fuel pump life model after the fuel pump is operated for a certain period of time in an accumulated manner.
15. The fuel pump controller of claim 14, wherein the input module is configured to also obtain an external environmental parameter.
16. The fuel pump controller of claim 15, wherein the arithmetic processing module is configured to determine the estimated fuel pressure and/or the estimated fuel pump output flow by means of a fuel pump life model based on the fuel pump cumulative operating time and the pump core parameter and the external environmental parameter.
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Citations (5)
| 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 |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10428744B2 (en) * | 2016-08-15 | 2019-10-01 | Hamilton Sundstrand Corporation | Fuel pump health detection |
-
2020
- 2020-07-27 CN CN202010729993.1A patent/CN113982771B/en active Active
Patent Citations (5)
| 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 |
| 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 |
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