CN112012840A - Pressure relief valve state evaluation control method and device and electronic equipment - Google Patents
Pressure relief valve state evaluation control method and device and electronic equipment Download PDFInfo
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- CN112012840A CN112012840A CN202010738239.4A CN202010738239A CN112012840A CN 112012840 A CN112012840 A CN 112012840A CN 202010738239 A CN202010738239 A CN 202010738239A CN 112012840 A CN112012840 A CN 112012840A
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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
- F02D41/22—Safety or indicating devices for abnormal conditions
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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
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D2041/224—Diagnosis of the fuel system
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
The embodiment of the invention discloses a method and a device for evaluating and controlling the state of a pressure relief valve and electronic equipment, wherein the method comprises the following steps: acquiring the change gradient of the rail pressure inside a rail pipe in the engine common rail system; inputting the rail pressure change gradient inside the rail pipe into a rail pressure state evaluation function state machine to obtain a rail pressure state evaluation value; inputting the rail pressure state evaluation value into a pressure relief valve state evaluation state machine to obtain the current opening times and the current accumulated opening time of the pressure relief valve; and when the current opening times of the pressure relief valve is greater than the upper limit of the opening times and/or the current accumulated opening time of the pressure relief valve is greater than the upper limit of the accumulated opening time, alarming. The invention can accurately and effectively calculate the opening and closing times and the accumulated opening time of the pressure release valve, and sends out fault alarm information to remind a driver to replace the pressure release valve when the opening and closing times and the accumulated opening time exceed a certain limit value, thereby ensuring the safe operation of a vehicle.
Description
Technical Field
The embodiment of the invention relates to the field of engines, in particular to a method and a device for evaluating and controlling the state of a pressure relief valve in a common rail fuel system of an engine and electronic equipment.
Background
Along with the development of an engine fuel high-pressure common rail system, in order to meet the higher and higher requirements of environmental protection, energy conservation and emission reduction, the injection pressure of the common rail system is higher and higher, and the pressure born by a rail pipe of the common rail fuel system is correspondingly increased. Under certain conditions, it may happen that the pressure in the rail exceeds the system safety limits, which may result in damage to fuel system components and affect vehicle operational reliability and stability. Therefore, a Pressure Release Valve (PRV) is arranged in the common rail pipe and has the function of opening the Pressure Release in time when the internal Pressure of the rail pipe exceeds the limit so as to prevent the damage of the rail Pressure to the engine.
The fuel metering valve on the high pressure oil pump in the fuel oil system opens a way, return oil way and block up and rail pressure sensor trouble scheduling problem, can lead to rail intraductal pressure sharply to rise, surpass relief valve pressure limit, lead to the relief valve to open the pressure release, rail intraductal pressure decline after the pressure release, the relief valve resets under the spring action, rail intraductal pressure is built again, after pressure surpasses the limit value once more, the relief valve reopens, so the circulation is reciprocal, if the number of times is too much or open the hold time longer for the relief valve opening, can seriously influence the relief valve function, lead to the interior spring fatigue damage of relief valve, the problem of can not reset takes place, influence fuel oil. If the vehicle cannot be replaced in time, the vehicle cannot normally run.
Disclosure of Invention
The embodiment of the invention aims to provide a pressure relief valve state evaluation control method, a pressure relief valve state evaluation control device and electronic equipment, which are used for solving the problems that the state of a pressure relief valve of an engine common rail fuel system is difficult to accurately monitor, and fatigue damage of a spring in the pressure relief valve cannot be timely alarmed, so that a vehicle cannot normally run.
In order to achieve the above object, the embodiments of the present invention mainly provide the following technical solutions:
in a first aspect, an embodiment of the present invention provides a method for evaluating and controlling a state of a pressure relief valve, including: acquiring the change gradient of the rail pressure inside a rail pipe in the engine common rail system; inputting the rail pressure change gradient inside the rail pipe into a rail pressure state evaluation function state machine so that the rail pressure state evaluation function state machine obtains a rail pressure state evaluation value according to the rail pressure change gradient inside the rail pipe and rail pressure change evaluation parameters, wherein the rail pressure state evaluation value comprises six different rail pressure states; inputting the rail pressure state evaluation value into a pressure relief valve state evaluation state machine, so that the pressure relief valve state evaluation state machine obtains the current opening times and the current accumulated opening time of the pressure relief valve according to the rail pressure state evaluation value, the engine speed, the rail pressure control state, the pressure relief valve operation setting parameter, the historical accumulated opening times and the historical accumulated opening time of the pressure relief valve; and when the current opening times of the pressure relief valve is greater than the upper limit of the opening times and/or the current accumulated opening time of the pressure relief valve is greater than the upper limit of the accumulated opening time, alarming.
According to one embodiment of the invention, the rail pressure variation evaluation parameter includes an actual rail pressure value of the rail pressure sensor, an average rail pressure substitute value, rail pressure sensor fault information, a first-stage rail pressure gradient set value, a second-stage rail pressure gradient set value, a waiting time set value before calculating the average rail pressure after the relief valve is opened, an average rail pressure time set value after the relief valve is opened, a rail pressure deviation range set value, an engine state and a relief valve state value.
According to one embodiment of the invention, the operation setting parameters of the pressure relief valve comprise a minimum engine speed setting value for opening the pressure relief valve after the engine is started, a safety detection waiting time setting value after the engine is started, a maximum engine speed setting value for closing the pressure relief valve, a pressure wave shock impact time setting value after the pressure relief valve is forcibly opened, a waiting re-construction pressure time setting value after the pressure relief valve is forcibly opened, and a pressure wave shock impact minimum engine speed setting value.
According to an embodiment of the present invention, further comprising: and the rail pressure state evaluation function state machine outputs the average value of the rail pressure after the pressure relief valve is opened.
In a second aspect, an embodiment of the present invention further provides a pressure relief valve state evaluation control apparatus, including: the acquisition module is used for acquiring the rail pressure change gradient inside a rail pipe in the engine common rail system; an alarm module; the control processing module is used for inputting the rail pressure change gradient inside the rail pipe into a rail pressure state evaluation function state machine so as to enable the rail pressure state evaluation function state machine to obtain a rail pressure state evaluation value according to the rail pressure change gradient inside the rail pipe and rail pressure change evaluation parameters, and the rail pressure state evaluation value comprises six different rail pressure states; the control processing module is further used for inputting the rail pressure state evaluation value into a pressure release valve state evaluation state machine so that the pressure release valve state evaluation state machine can obtain the current opening times and the current accumulated opening time of the pressure release valve according to the rail pressure state evaluation value, the engine speed, the rail pressure control state, the pressure release valve operation setting parameter, the historical accumulated opening times and the historical accumulated opening time of the pressure release valve; the control processing module is further used for giving an alarm through the alarm module when the current opening times of the pressure release valve is larger than the upper limit of the opening times and/or the current accumulated opening time of the pressure release valve is larger than the upper limit of the accumulated opening time.
According to one embodiment of the invention, the rail pressure variation evaluation parameter includes an actual rail pressure value of the rail pressure sensor, an average rail pressure substitute value, rail pressure sensor fault information, a first-stage rail pressure gradient set value, a second-stage rail pressure gradient set value, a waiting time set value before calculating the average rail pressure after the relief valve is opened, an average rail pressure time set value after the relief valve is opened, a rail pressure deviation range set value, an engine state and a relief valve state value.
According to one embodiment of the invention, the operation setting parameters of the pressure relief valve comprise a minimum engine speed setting value for opening the pressure relief valve after the engine is started, a safety detection waiting time setting value after the engine is started, a maximum engine speed setting value for closing the pressure relief valve, a pressure wave shock impact time setting value after the pressure relief valve is forcibly opened, a waiting re-construction pressure time setting value after the pressure relief valve is forcibly opened, and a pressure wave shock impact minimum engine speed setting value.
According to an embodiment of the invention, the control processing module is further configured to output the average rail pressure after the pressure relief valve is opened by the rail pressure state evaluation function state machine.
In a third aspect, an embodiment of the present invention further provides an electronic device, including: at least one processor and at least one memory; the memory is to store one or more program instructions; the processor is configured to execute one or more program instructions to execute the pressure relief valve state evaluation control method according to the first aspect.
In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium containing one or more program instructions for executing the pressure relief valve state evaluation control method according to the first aspect.
The technical scheme provided by the embodiment of the invention at least has the following advantages:
the method, the device and the electronic equipment for evaluating and controlling the state of the pressure relief valve, provided by the embodiment of the invention, can accurately and effectively calculate the opening and closing times and the accumulated opening time of the pressure relief valve, and send out fault alarm information to remind a driver to replace the pressure relief valve when the opening and closing times and the accumulated opening time exceed a certain limit value, so that the safe operation of a vehicle is ensured.
Drawings
Fig. 1 is a flowchart of a pressure relief valve state evaluation control method according to an embodiment of the present invention.
Fig. 2 is a flow chart of a rail pressure state evaluation function according to an embodiment of the present invention.
FIG. 3 is a flow chart illustrating the state function of a pressure relief valve according to an embodiment of the present invention.
Fig. 4 is a block diagram of a pressure relief valve state evaluation control apparatus according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
In the following description, for purposes of explanation and not limitation, specific details are set forth such as particular system structures, interfaces, techniques, etc. in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as meaning directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Fig. 1 is a flowchart of a pressure relief valve state evaluation control method according to an embodiment of the present invention. As shown in fig. 1, a method for evaluating and controlling a state of a pressure relief valve according to an embodiment of the present invention includes:
s1: and acquiring the change gradient of the rail pressure inside the rail pipe in the engine common rail system.
Specifically, according to actual pressure data obtained by the pressure sensor in the rail pipe, the difference value between the pressure value at the current moment and the pressure value at the last moment is calculated, and the difference value is divided by the interval time between two times of value acquisition to obtain a pressure gradient value.
S2: and inputting the rail pressure change gradient inside the rail pipe into a rail pressure state evaluation function state machine so that the rail pressure state evaluation function state machine obtains a rail pressure state evaluation value according to the rail pressure change gradient inside the rail pipe and the rail pressure change evaluation parameter, wherein the rail pressure state evaluation value comprises six different rail pressure states.
Specifically, the rail pressure change gradient inside the rail pipe is used as an input quantity to enter a rail pressure state evaluation function state machine. The input quantity of the rail pressure state evaluation function state machine also comprises an actual rail pressure value of a rail pressure sensor, a rail pressure substitute value, a rail pressure sensor fault, a first-order rail pressure gradient set value, a second-order rail pressure gradient set value, a waiting time set value before calculating average rail pressure after PRV is started, an average rail pressure time set value after PRV is started, a rail pressure deviation range set value, and a PRV state calculated by the engine state and pressure relief valve PRV state evaluation function state machine. The output quantity of the state machine is the average rail pressure overrun fault after PRV is opened, the rail pressure average value and the rail pressure state evaluation value are set after the pressure release valve is opened, and the rail pressure state evaluation value enters the PRV state evaluation function of the pressure release valve to serve as the input quantity.
TABLE 1 Rail pressure State evaluation function State machine input-output variable List
Fig. 2 is a flow chart of a rail pressure state evaluation function according to an embodiment of the present invention. As shown in fig. 2, the rail pressure state evaluation includes six states, and the rail pressure initialization state is entered first, and after the transition condition is satisfied, the rail pressure change gradient evaluation states of the first and second stages are entered in sequence. And if the PRV is in the rail pressure estimation opening state, directly judging that the pressure relief valve is in the opening state, and calculating the rail pressure average pressure after the pressure relief valve is opened for a period of time in the state. And if the average pressure value exceeds the set range, entering a rail pressure overrun state after the pressure relief valve is opened, and reporting an average pressure overrun fault. When the PRV state is judged to be the closed state condition, the opening state of the rail pressure evaluation relief valve and the rail pressure overrun state after the PRV is opened can enter a first-order rail pressure change gradient state. The state in which the rail pressure estimation calculation is not performed means that when the rail pressure sensor fails, the state is tripped out of all the states and into the state.
The rail pressure evaluation state function has a total of 9 entry and exit conditions between the states, as shown in table 2.
TABLE 2 entry and exit conditions between states of the rail pressure evaluation state function
The rail pressure condition evaluation function contains six conditions, the calculation logic for each condition, as shown in table 3.
TABLE 3 calculation logic for each state of the rail pressure evaluation State function
S3: and inputting the rail pressure state evaluation value into a pressure relief valve state evaluation state machine, so that the pressure relief valve state evaluation state machine obtains the current opening times and the current accumulated opening time of the pressure relief valve according to the rail pressure state evaluation value, the engine rotating speed, the rail pressure control state, the pressure relief valve operation setting parameter, the historical accumulated opening times and the historical accumulated opening time of the pressure relief valve.
Specifically, after calculation by the rail pressure evaluation state machine, the rail pressure state evaluation value result is used as an input quantity to enter a pressure relief valve state evaluation module, and the input quantity of the pressure relief valve state evaluation module further comprises an engine speed, a rail pressure control state, a minimum engine speed set value for opening the pressure relief valve after the engine is started, a safety detection waiting time set value after the engine is started, a maximum engine speed set value for closing the pressure relief valve, a maximum PRV accumulated opening time set threshold value, a maximum accumulated opening time set threshold value of the pressure relief valve, a pressure wave oscillation impact time set value after the pressure relief valve is forcibly opened, a newly-built pressure waiting time set value after the pressure relief valve is forcibly opened, a minimum engine speed set value for pressure wave oscillation impact, an accumulated opening time and an accumulated opening time of the pressure relief.
S4: and when the current opening times of the pressure relief valve is greater than the upper limit of the opening times and/or the current accumulated opening time of the pressure relief valve is greater than the upper limit of the accumulated opening time, alarming.
The output variables of the pressure relief valve PRV state evaluation state machine function comprise PRV accumulated opening times, PRV accumulated opening time, PRV opening faults, pressure wave shock times of forced opening of PRV and the PRV state of the pressure relief valve, wherein the PRV state is used as input quantity to enter the rail pressure state evaluation function state machine. If a fault is reported after the PRV accumulated opening times reach the maximum set threshold value or a fault is reported after the PRV accumulated opening time reaches the maximum set threshold value, the PRV fatigue damage fault is triggered to remind a driver of needing to maintain and replace the pressure release valve.
The input and output variables of the pressure relief valve PRV state estimation state machine are shown in Table 4.
TABLE 4 list of input and output variables of state machine for PRV state evaluation function of pressure release valves
FIG. 3 is a flow chart illustrating the state function of a pressure relief valve according to an embodiment of the present invention. As shown in fig. 3, the pressure relief valve PRV state evaluation function includes 5 states, and first enters a PRV initialization state, reads stored values of the opening times and the accumulated time of the pressure relief valve in the previous driving cycle in the initialization state, and counts the time in the state, enters the PRV opening state when the engine speed is greater than a certain threshold, and enters the PRV closing state when the engine speed is less than the certain threshold and the PRV initialization state is greater than the set time. In the PRV open state, the number of open times and the accumulated open time are calculated, and the data of the time and the data of the previous driving cycle are accumulated and then stored in an ECU memory for reading in when the next driving cycle starts. And after the accumulated opening times and the opening time reach a certain threshold value, fault information is reported to prompt a driver to maintain and replace the pressure release valve. After the PRV is forcibly opened, the PRV is divided into a pressure-waiting reestablishment state and a pressure wave oscillation impact state, and the two states can be mutually converted when the transition condition is met.
Entry and exit conditions between the various states of the PRV state evaluation function are shown in table 5.
TABLE 5 entry and exit conditions between various states of the PRV State evaluation function
The PRV state evaluation function calculates logic in each state as shown in Table 6.
TABLE 6 calculation logic for each state of the PRV State evaluation function
The pressure relief valve state evaluation control method provided by the embodiment of the invention can accurately and effectively calculate the opening and closing times and the accumulated opening time of the pressure relief valve, and when the opening and closing times and the accumulated opening time exceed a certain limit value, fault alarm information is sent out to remind a driver to replace the pressure relief valve, so that the safe operation of a vehicle is ensured.
Fig. 4 is a block diagram of a pressure relief valve state evaluation control apparatus according to an embodiment of the present invention. As shown in fig. 4, the pressure relief valve state evaluation control apparatus according to the embodiment of the present invention includes: an acquisition module 100, an alarm module 200 and a control processing module 300.
The acquiring module 100 is used for acquiring the rail pressure change gradient inside a rail pipe in the engine common rail system; and an alarm module. The control processing module 300 is configured to input the rail pressure change gradient inside the rail pipe to the rail pressure state evaluation function state machine, so that the rail pressure state evaluation function state machine obtains a rail pressure state evaluation value according to the rail pressure change gradient inside the rail pipe and the rail pressure change evaluation parameter, where the rail pressure state evaluation value includes six different rail pressure states. The control processing module 300 is further configured to input the rail pressure state evaluation value to the pressure relief valve state evaluation state machine, so that the pressure relief valve state evaluation state machine obtains the current opening times and the current accumulated opening time of the pressure relief valve according to the rail pressure state evaluation value, the engine speed, the rail pressure control state, the pressure relief valve operation setting parameter, the historical accumulated opening times and the historical accumulated opening time of the pressure relief valve. The control processing module 300 is further configured to alarm through the alarm module 200 when the current opening time of the pressure relief valve is greater than the upper limit of the opening time, and/or the current accumulated opening time of the pressure relief valve is greater than the upper limit of the accumulated opening time.
In one embodiment of the invention, the rail pressure variation evaluation parameter includes an actual rail pressure value of the rail pressure sensor, an average rail pressure substitute value, rail pressure sensor fault information, a first-stage rail pressure gradient set value, a second-stage rail pressure gradient set value, a waiting time set value before calculating the average rail pressure after the relief valve is opened, an average rail pressure time set value after the relief valve is opened, a rail pressure deviation range set value, an engine state and a relief valve state value.
In one embodiment of the invention, the operation setting parameters of the pressure relief valve comprise a minimum engine speed setting value for opening the pressure relief valve after the engine is started, a safety detection waiting time setting value after the engine is started, a maximum engine speed setting value for closing the pressure relief valve, a pressure wave shock impact time setting value after the pressure relief valve is forcibly opened, a waiting reestablishment pressure time setting value after the pressure relief valve is forcibly opened and a minimum engine speed setting value of pressure wave shock impact.
In one embodiment of the invention, the control processing module 300 is further configured to output the average rail pressure after the relief valve is opened by the rail pressure state evaluation function state machine.
It should be noted that the specific implementation of the pressure relief valve state evaluation control apparatus according to the embodiment of the present invention is similar to the specific implementation of the pressure relief valve state evaluation control method according to the embodiment of the present invention, and specific reference is made to the description of the pressure relief valve state evaluation control method, and details are not repeated for reducing redundancy.
In addition, other structures and functions of the pressure relief valve state evaluation control device according to the embodiment of the present invention are known to those skilled in the art, and are not described in detail for reducing redundancy.
An embodiment of the present invention further provides an electronic device, including: at least one processor and at least one memory; the memory is to store one or more program instructions; the processor is configured to execute one or more program instructions to execute the pressure relief valve state evaluation control method according to the first aspect.
The embodiment of the invention discloses a computer-readable storage medium, wherein computer program instructions are stored in the computer-readable storage medium, and when the computer program instructions are run on a computer, the computer is enabled to execute the pressure relief valve state evaluation control method.
In an embodiment of the invention, the processor may be an integrated circuit chip having signal processing capability. The Processor may be a general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component.
The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The processor reads the information in the storage medium and completes the steps of the method in combination with the hardware.
The storage medium may be a memory, for example, which may be volatile memory or nonvolatile memory, or which may include both volatile and nonvolatile memory.
The nonvolatile memory may be a Read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash memory.
The volatile Memory may be a Random Access Memory (RAM) which serves as an external cache. By way of example and not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (ddr Data Rate SDRAM), Enhanced SDRAM (ESDRAM), synchlink DRAM (SLDRAM), and Direct Rambus RAM (DRRAM).
The storage media described in connection with the embodiments of the invention are intended to comprise, without being limited to, these and any other suitable types of memory.
Those skilled in the art will appreciate that the functionality described in the present invention may be implemented in a combination of hardware and software in one or more of the examples described above. When software is applied, the corresponding functionality may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the present invention should be included in the scope of the present invention.
Claims (10)
1. A pressure relief valve state evaluation control method is characterized by comprising the following steps:
acquiring the change gradient of the rail pressure inside a rail pipe in the engine common rail system;
inputting the rail pressure change gradient inside the rail pipe into a rail pressure state evaluation function state machine so that the rail pressure state evaluation function state machine obtains a rail pressure state evaluation value according to the rail pressure change gradient inside the rail pipe and rail pressure change evaluation parameters, wherein the rail pressure state evaluation value comprises six different rail pressure states;
inputting the rail pressure state evaluation value into a pressure relief valve state evaluation state machine, so that the pressure relief valve state evaluation state machine obtains the current opening times and the current accumulated opening time of the pressure relief valve according to the rail pressure state evaluation value, the engine speed, the rail pressure control state, the pressure relief valve operation setting parameter, the historical accumulated opening times and the historical accumulated opening time of the pressure relief valve;
and when the current opening times of the pressure relief valve is greater than the upper limit of the opening times and/or the current accumulated opening time of the pressure relief valve is greater than the upper limit of the accumulated opening time, alarming.
2. The method for evaluating and controlling the state of the pressure relief valve according to claim 1, wherein the rail pressure change evaluation parameter comprises an actual rail pressure value of a rail pressure sensor, an average rail pressure substitute value, rail pressure sensor fault information, a first-stage rail pressure gradient set value, a second-stage rail pressure gradient set value, a waiting time set value before calculating the average rail pressure after the pressure relief valve is opened, an average rail pressure time set value after the pressure relief valve is opened, a rail pressure deviation range set value, an engine state and a pressure relief valve state value.
3. The method according to claim 1, wherein the operation setting parameters of the pressure relief valve include a minimum engine speed setting value for opening the pressure relief valve after the engine is started, a safety detection waiting time setting value for closing the pressure relief valve after the engine is started, a maximum engine speed setting value for closing the pressure relief valve, a pressure wave shock impact time setting value for forcibly opening the pressure relief valve, a pressure wave shock impact waiting time setting value for forcibly opening the pressure relief valve, and a minimum engine speed setting value for pressure wave shock impact.
4. The pressure relief valve state evaluation control method according to claim 1, further comprising: and the rail pressure state evaluation function state machine outputs the average value of the rail pressure after the pressure relief valve is opened.
5. A pressure relief valve state evaluation control apparatus, characterized by comprising:
the acquisition module is used for acquiring the rail pressure change gradient inside a rail pipe in the engine common rail system;
an alarm module;
the control processing module is used for inputting the rail pressure change gradient inside the rail pipe into a rail pressure state evaluation function state machine so as to enable the rail pressure state evaluation function state machine to obtain a rail pressure state evaluation value according to the rail pressure change gradient inside the rail pipe and rail pressure change evaluation parameters, and the rail pressure state evaluation value comprises six different rail pressure states; the control processing module is further used for inputting the rail pressure state evaluation value into a pressure release valve state evaluation state machine so that the pressure release valve state evaluation state machine can obtain the current opening times and the current accumulated opening time of the pressure release valve according to the rail pressure state evaluation value, the engine speed, the rail pressure control state, the pressure release valve operation setting parameter, the historical accumulated opening times and the historical accumulated opening time of the pressure release valve; the control processing module is further used for giving an alarm through the alarm module when the current opening times of the pressure release valve is larger than the upper limit of the opening times and/or the current accumulated opening time of the pressure release valve is larger than the upper limit of the accumulated opening time.
6. The pressure relief valve state evaluation control apparatus according to claim 5, wherein the rail pressure variation evaluation parameter includes an actual rail pressure value of the rail pressure sensor, an average rail pressure substitute value, rail pressure sensor failure information, a first-stage rail pressure gradient set value, a second-stage rail pressure gradient set value, a waiting time set value before calculating the average rail pressure after the pressure relief valve is opened, a calculated average rail pressure time set value after the pressure relief valve is opened, a rail pressure deviation range set value, an engine state, and a pressure relief valve state value.
7. The pressure relief valve state evaluation control device according to claim 5, wherein the operation setting parameters of the pressure relief valve include a minimum engine speed setting value for opening the pressure relief valve after the engine is started, a safety detection waiting time setting value for closing the pressure relief valve after the engine is started, a maximum engine speed setting value for closing the pressure relief valve, a pressure wave shock impact time setting value for forcibly opening the pressure relief valve, a pressure wave shock impact time setting value for waiting for reestablishing the pressure relief valve after the pressure relief valve is forcibly opened, and a minimum engine speed setting value for pressure wave shock impact.
8. The pressure relief valve state evaluation control device according to claim 5, wherein the control processing module is further configured to output an average value of rail pressure after the pressure relief valve is opened by the rail pressure state evaluation function state machine.
9. An electronic device, characterized in that the electronic device comprises: at least one processor and at least one memory;
the memory is to store one or more program instructions;
the processor is configured to execute one or more program instructions to perform the pressure relief valve state evaluation control method according to any one of claims 1 to 4.
10. A computer readable storage medium having one or more program instructions embodied therein for performing the pressure relief valve state assessment control method of any of claims 1-4.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2009281184A (en) * | 2008-05-20 | 2009-12-03 | Denso Corp | Fuel supply control device and fuel supply system using the same |
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| CN112012840B (en) | 2023-05-05 |
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