CN114658525A - Method and device for determining sensor fault in HC injection system - Google Patents
Method and device for determining sensor fault in HC injection system Download PDFInfo
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- CN114658525A CN114658525A CN202210284565.1A CN202210284565A CN114658525A CN 114658525 A CN114658525 A CN 114658525A CN 202210284565 A CN202210284565 A CN 202210284565A CN 114658525 A CN114658525 A CN 114658525A
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- 239000007924 injection Substances 0.000 title claims abstract description 106
- 238000000034 method Methods 0.000 title claims abstract description 68
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 225
- 239000000446 fuel Substances 0.000 claims description 28
- 230000008569 process Effects 0.000 claims description 12
- 238000004590 computer program Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 10
- 230000007257 malfunction Effects 0.000 description 10
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/025—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
- F01N3/0253—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust adding fuel to exhaust gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/0601—Parameters used for exhaust control or diagnosing being estimated
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/10—Parameters used for exhaust control or diagnosing said parameters being related to the vehicle or its components
- F01N2900/104—Battery status
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/18—Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
- F01N2900/1806—Properties of reducing agent or dosing system
- F01N2900/1808—Pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2900/00—Details of electrical control or of the monitoring of the exhaust gas treating apparatus
- F01N2900/06—Parameters used for exhaust control or diagnosing
- F01N2900/18—Parameters used for exhaust control or diagnosing said parameters being related to the system for adding a substance into the exhaust
- F01N2900/1806—Properties of reducing agent or dosing system
- F01N2900/1811—Temperature
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a method and a device for determining sensor faults in an HC injection system. The invention comprises the following steps: acquiring a plurality of working condition parameters corresponding to a target vehicle, and judging whether the working condition parameters respectively meet a plurality of preset conditions corresponding to the working condition parameters; acquiring an upstream pressure value and an upstream temperature value corresponding to the HC injection system under the condition that the working condition parameters respectively meet respective corresponding preset conditions; determining whether the upstream pressure temperature sensor has a stitch sequence reverse fault according to the upstream pressure value and the upstream temperature value; and under the condition that the upstream pressure and temperature sensor is determined to have a stitch reverse order fault, triggering prompt information to prompt the upstream pressure and temperature sensor to have a fault. The invention solves the problem that the upstream pressure and temperature sensor of the HC injection system in the related art has the condition of reverse wiring, so that the engine cannot work normally.
Description
Technical Field
The invention relates to the field of HC injection systems, in particular to a method and a device for determining sensor faults in an HC injection system.
Background
In the related art, the exhaust emission requirements of the engine are strict, and in order to meet the emission requirements of carbon particles, a wall-flow type particle trap is required to be added for trapping the particles, but after the carbon particles are trapped to a certain extent, the engine usually needs to burn the carbon particles by injecting fuel into an exhaust pipe, so that an HC injection system is added to part of the vehicle engine to control fuel injection into the exhaust pipe of the tank. The HC injection system controls partial fuel to be directly injected into an exhaust tail pipe through an electronic control unit of the engine, if the HC injection system has faults, the HC injection system cannot work normally, and further the wall-flow type particle trap is blocked, and the engine cannot run normally.
In the prior art, the HC injection system comprises an upstream pressure and temperature sensor, the upstream pressure and temperature sensor is provided with 4 pins, the pins are connected in a corresponding sequence, and if the sequence of the pins is reversed, a fault cannot be reported, but the HC injection system cannot work normally.
In view of the above problems in the related art, no effective solution has been proposed.
Disclosure of Invention
The invention mainly aims to provide a method and a device for determining sensor faults in an HC injection system, so as to solve the problem that an engine cannot normally work due to the fact that a harness is reversely connected to an upstream pressure and temperature sensor of the HC injection system in the related art.
In order to achieve the above object, according to one aspect of the present invention, there is provided a method of determining a sensor malfunction in an HC injection system. The invention comprises the following steps: acquiring a plurality of working condition parameters corresponding to a target vehicle, and judging whether the working condition parameters respectively meet a plurality of preset conditions corresponding to the working condition parameters; under the condition that the working condition parameters respectively meet corresponding preset conditions, acquiring an upstream pressure value and an upstream temperature value corresponding to the HC injection system, wherein the HC injection system is arranged in an engine of a target vehicle, the upstream pressure value is a fuel pressure value of the engine, and the upstream temperature value is a fuel temperature value of the engine; determining whether a stitch reverse fault occurs on an upstream pressure and temperature sensor according to an upstream pressure value and an upstream temperature value, wherein the upstream pressure and temperature sensor is arranged in the HC injection system; and under the condition that the upstream pressure and temperature sensor is determined to have a stitch reverse order fault, triggering prompt information to prompt the upstream pressure and temperature sensor to have a fault.
Further, acquiring a plurality of working condition parameters corresponding to the target vehicle, including: acquiring the current rotating speed of the engine; acquiring the state of the HC injection system, wherein the state is any one of the following states: non-fault state, fault state; acquiring an ambient temperature corresponding to a space where a target vehicle is located; the battery voltage of the target vehicle is acquired.
Further, respectively judging whether the plurality of working condition parameters satisfy a plurality of preset conditions corresponding to the plurality of working condition parameters, including: judging whether the current rotating speed meets a first preset condition, wherein the first preset condition is that the current rotating speed is smaller than a preset rotating speed; judging whether the HC injection system meets a second preset condition or not, wherein the second preset condition is that the HC injection system is in a non-fault state; judging whether the ambient temperature meets a third preset condition, wherein the third preset condition is that the ambient temperature is higher than the preset ambient temperature; and judging whether the voltage meets a fourth preset condition, wherein the fourth preset condition is that the voltage is greater than the preset voltage.
Further, determining whether the upstream pressure and temperature sensor has a reverse stitch sequence fault according to the upstream pressure value and the upstream temperature value comprises: judging whether the upstream pressure value is larger than a first value or not; judging whether the upstream temperature value is larger than a second value or not; determining a preset value plus one under the condition that the upstream pressure value is greater than a first value and the upstream temperature value is greater than a second value; and acquiring the total number corresponding to the preset value in real time, and determining whether the upstream pressure and temperature sensor has a stitch sequence reverse fault according to the total number.
Further, the method includes the steps of acquiring the total number corresponding to the preset value in real time, and determining whether the upstream pressure and temperature sensor has a stitch sequence reverse fault according to the total number, wherein the method includes the following steps: comparing the total number with a preset threshold value; determining that the upstream pressure and temperature sensor has a stitch sequence reverse fault when the total number is greater than a preset threshold value; and determining that the upstream pressure and temperature sensor has no stitch sequence reverse fault when the sum is less than or equal to the preset threshold value.
Further, before determining whether the upstream pressure value is greater than the first value, the method further comprises: acquiring a first numerical range, and determining a maximum value corresponding to the first numerical range as a first numerical value; before determining whether the upstream temperature value is greater than the second value, the method further comprises: and acquiring a second numerical range, and determining the maximum value corresponding to the second numerical range as a second numerical value.
Further, before obtaining a plurality of operating condition parameters corresponding to the target vehicle, the method further includes: determining whether the target vehicle is in a preset state, and entering a determination process for determining whether the engine is in a fault state under the condition that the target vehicle is in the preset state, wherein the preset state is a state that an engine electronic control unit of the target vehicle is started and a state that the engine is not started within a preset time period.
In order to achieve the above object, according to another aspect of the present invention, there is provided a determination device of a sensor malfunction in an HC injection system. The device includes: the judging unit is used for acquiring a plurality of working condition parameters corresponding to the target vehicle and judging whether the working condition parameters respectively meet a plurality of preset conditions corresponding to the working condition parameters; the system comprises a first acquisition unit, a second acquisition unit and a control unit, wherein the first acquisition unit is used for acquiring an upstream pressure value and an upstream temperature value corresponding to an HC injection system under the condition that a plurality of working condition parameters respectively meet respective corresponding preset conditions, the HC injection system is arranged in an engine of a target vehicle, the upstream pressure value is a fuel pressure value of the engine, and the upstream temperature value is a fuel temperature value of the engine; a first determination unit for determining whether a stitch reverse fault occurs in an upstream pressure temperature sensor according to an upstream pressure value and an upstream temperature value, wherein the upstream pressure temperature sensor is provided in the HC injection system; and the triggering unit is used for triggering prompt information to prompt the upstream pressure and temperature sensor to have a fault under the condition that the upstream pressure and temperature sensor is determined to have a reverse stitch sequence fault.
In order to achieve the above object, according to another aspect of the present application, there is provided a computer-readable storage medium including a stored program, wherein the program executes a method of determining a sensor failure in an HC injection system of any one of the above.
In order to achieve the above object, according to another aspect of the present application, there is provided a processor for executing a program, wherein the program executes a method of determining a sensor failure in an HC injection system of any one of the above.
The invention adopts the following steps: acquiring a plurality of working condition parameters corresponding to a target vehicle, and judging whether the working condition parameters respectively meet a plurality of preset conditions corresponding to the working condition parameters; under the condition that the working condition parameters respectively meet corresponding preset conditions, acquiring an upstream pressure value and an upstream temperature value corresponding to the HC injection system, wherein the HC injection system is arranged in an engine of a target vehicle, the upstream pressure value is a fuel pressure value of the engine, and the upstream temperature value is a fuel temperature value of the engine; determining whether a stitch reverse fault occurs on an upstream pressure and temperature sensor according to an upstream pressure value and an upstream temperature value, wherein the upstream pressure and temperature sensor is arranged in the HC injection system; under the condition that the stitch sequence reverse connection fault of the upstream pressure and temperature sensor is determined, the prompt information is triggered to prompt the upstream pressure and temperature sensor to have the fault, the problem that the engine cannot normally work due to the fact that the upstream pressure and temperature sensor of the HC injection system has the condition that the stitch sequence reverse connection fault in the related technology is solved, and the effect of timely prompting the upstream pressure and temperature sensor to have the fault is achieved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a first flowchart of a method for determining a sensor fault in an HC injection system according to an embodiment of the present disclosure;
FIG. 2 is a second flowchart of a method for determining a sensor fault in an HC injection system according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a determination device of a sensor malfunction in an HC injection system according to an embodiment of the invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make those skilled in the art better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged under appropriate circumstances in order to facilitate the description of the embodiments of the invention herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
According to an embodiment of the present invention, a method of determining a sensor malfunction in an HC injection system is provided.
Fig. 1 is a first flowchart of a method of determining a sensor malfunction in an HC injection system, in accordance with an embodiment of the invention. As shown in fig. 1, the present invention comprises the steps of:
step S101, a plurality of working condition parameters corresponding to the target vehicle are obtained, and whether the working condition parameters respectively meet a plurality of preset conditions corresponding to the working condition parameters is judged.
The operating condition parameters refer to operating parameters under the condition that the target vehicle and the action thereof have a direct relationship, and after a plurality of operating condition parameters corresponding to the target vehicle are obtained, whether the plurality of operating condition parameters meet a plurality of corresponding preset conditions is respectively judged.
And S102, acquiring an upstream pressure value and an upstream temperature value corresponding to the HC injection system under the condition that the working condition parameters respectively meet respective corresponding preset conditions, wherein the HC injection system is arranged in an engine of a target vehicle, the upstream pressure value is a fuel pressure value of the engine, and the upstream temperature value is a fuel temperature value of the engine.
The HC injection system is configured to receive a signal from an Electronic Control Unit (ECU) of the engine, so as to control fuel to be directly injected into the exhaust pipe, where the ECU includes two types, i.e., a control unit (MU) and an Injection Unit (IU), where the control unit is configured to control and meter fuel injected into the exhaust pipe, the injection unit is installed on the exhaust pipe, and is configured to inject fuel before the wall-flow particulate trap, and the opening mode is mechanical: 2.65bar on was reached and less than 2.65bar off. The upstream pressure value and the upstream temperature value corresponding to the HC injection system are obtained by an upstream pressure temperature sensor positioned in the HC injection system.
And S103, determining whether the upstream pressure and temperature sensor has a stitch sequence reverse fault or not according to the upstream pressure value and the upstream temperature value, wherein the upstream pressure and temperature sensor is arranged in the HC injection system.
And determining whether the upstream pressure and temperature sensor has the reverse stitch sequence fault according to the upstream pressure value and the upstream temperature value measured by the upstream pressure and temperature sensor.
And step S104, under the condition that the upstream pressure and temperature sensor is determined to have a stitch sequence reverse connection fault, triggering prompt information to prompt the upstream pressure and temperature sensor to have a fault.
When the upstream pressure and temperature sensor has the reverse connection failure of the pin sequence, the prompt message is triggered to prompt the failure.
In an optional example, obtaining a plurality of operating condition parameters corresponding to the target vehicle includes: acquiring the current rotating speed of the engine; acquiring the state of the HC injection system, wherein the state is any one of the following states: non-fault state, fault state; acquiring an ambient temperature corresponding to a space where a target vehicle is located; the battery voltage of the target vehicle is acquired.
In the above, a plurality of operating condition parameters corresponding to the target vehicle are obtained by the engine electronic control unit, wherein the plurality of operating condition parameters include: the current engine speed, the state of the HC injection system, the ambient temperature corresponding to the space in which the target vehicle is located, and the battery voltage of the target vehicle.
In an optional example, the respectively determining whether the plurality of operating condition parameters satisfy a plurality of preset conditions corresponding to the plurality of operating condition parameters includes: judging whether the current rotating speed meets a first preset condition, wherein the first preset condition is that the current rotating speed is smaller than a preset rotating speed; judging whether the HC injection system meets a second preset condition or not, wherein the second preset condition is that the HC injection system is in a non-fault state; judging whether the ambient temperature meets a third preset condition, wherein the third preset condition is that the ambient temperature is higher than the preset ambient temperature; and judging whether the voltage meets a fourth preset condition, wherein the fourth preset condition is that the voltage is greater than the preset voltage.
Judging whether a plurality of preset conditions corresponding to the plurality of working condition parameters are met or not according to the plurality of working condition parameters obtained through the electronic control unit of the engine, wherein the first preset condition is that the current rotating speed is smaller than the preset rotating speed, and the preset rotating speed can be specifically set according to different scenes; the second preset condition is that the HC injection system is in a non-fault state, and when the HC injection system is in the non-fault state, the judgment that the stitch sequence reverse connection fault of an upstream pressure temperature sensor positioned in the HC injection system is generated meets the actual condition; the third preset condition is that the environmental temperature is greater than the preset environmental temperature, and the preset environmental temperature can be specifically set according to different scenes; the fourth preset condition is that the voltage is greater than the preset voltage, and the preset voltage can be specifically set according to different scenes.
In an alternative example, determining whether the upstream pressure temperature sensor has a reverse stitch sequence fault according to the upstream pressure value and the upstream temperature value comprises: judging whether the upstream pressure value is larger than a first value or not; judging whether the upstream temperature value is larger than a second value or not; determining a preset value plus one under the condition that the upstream pressure value is greater than a first value and the upstream temperature value is greater than a second value; and acquiring the total number corresponding to the preset value in real time, and determining whether the upstream pressure and temperature sensor has a stitch sequence reverse fault according to the total number.
And when the judgment condition is met, adding one to the counted times of the engine electronic control unit, accumulating the times, and determining whether the pin sequence reverse connection fault occurs to the upstream pressure temperature sensor according to the accumulated total number.
In an optional example, the step of acquiring a total number corresponding to the preset value in real time, and determining whether the upstream pressure and temperature sensor has a stitch sequence reverse connection fault according to the total number includes: comparing the total number with a preset threshold value; determining that the upstream pressure and temperature sensor has a stitch sequence reverse fault when the total number is greater than a preset threshold value; and determining that the upstream pressure and temperature sensor has no stitch sequence reverse fault when the sum is less than or equal to the preset threshold value.
The preset threshold value can be specifically set according to different scenes, the accumulated total number is compared with the preset threshold value, and when the total number is greater than the preset threshold value, the occurrence of the stitch sequence reverse connection fault of the upstream pressure and temperature sensor is determined; and determining that the upstream pressure and temperature sensor has no stitch sequence reverse fault when the sum is less than or equal to the preset threshold value.
In an optional example, before determining whether the upstream pressure value is greater than the first value, the method further comprises: acquiring a first numerical range, and determining a maximum value corresponding to the first numerical range as a first numerical value; before determining whether the upstream temperature value is greater than the second value, the method further comprises: and acquiring a second numerical range, and determining the maximum value corresponding to the second numerical range as a second numerical value.
In the above, the upstream pressure value and the upstream temperature value are compared with the respective corresponding numerical ranges of the upstream pressure temperature sensor when the reverse stitch connection failure does not occur, and when the upstream pressure value and the upstream temperature value exceed the respective corresponding numerical ranges, that is, are greater than the maximum values of the respective numerical ranges, the comparison result can be obtained.
In an optional example, before obtaining the plurality of operating condition parameters corresponding to the target vehicle, the method further includes: determining whether the target vehicle is in a preset state, and entering a determination process for determining whether the engine is in a fault state under the condition that the target vehicle is in the preset state, wherein the preset state is a state that an engine electronic control unit of the target vehicle is started and a state that the engine is not started within a preset time period.
The engine electronic control unit is a controller which performs operation, processing and judgment according to signals input by various sensors and then outputs an instruction to control the actuator to act, the preset time period can be specifically set according to different scenes, working condition parameters of a target vehicle in a starting state and an engine in an un-starting state of the engine electronic control unit in the preset time period are acquired, and the working condition of the target vehicle in the preset state in the preset time period is stable, so that the acquired working condition parameters are not greatly fluctuated.
In an embodiment provided by the present application, as shown in fig. 2, fig. 2 is a flowchart two of a method for determining a sensor failure in an HC injection system according to an embodiment of the present invention, judging a plurality of working condition conditions of the target vehicle, and under the condition that the working condition conditions are all met, namely, the current rotating speed of the engine is less than the preset rotating speed, the HC injection system is in a non-failure state, the environment temperature is greater than the preset environment temperature, the voltage is greater than the preset voltage and all the conditions are met, whether the upstream pressure value and the upstream temperature value exceed the normal numerical range of the corresponding upstream pressure temperature sensor without pin sequence reverse failure is checked, counting the times when the upstream pressure value and the upstream temperature value are all out of the respective corresponding normal value ranges, when the accumulated times are larger than a certain value, the pins of the upstream temperature and pressure sensor of the push HC injection system are in reverse connection failure.
According to the method for determining the sensor fault in the HC injection system, provided by the embodiment of the invention, a plurality of working condition parameters corresponding to a target vehicle are obtained, and whether the working condition parameters respectively meet a plurality of preset conditions corresponding to the working condition parameters is judged; under the condition that the working condition parameters respectively meet corresponding preset conditions, acquiring an upstream pressure value and an upstream temperature value corresponding to the HC injection system, wherein the HC injection system is arranged in an engine of a target vehicle, the upstream pressure value is a fuel pressure value of the engine, and the upstream temperature value is a fuel temperature value of the engine; determining whether a stitch reverse fault occurs on an upstream pressure and temperature sensor according to an upstream pressure value and an upstream temperature value, wherein the upstream pressure and temperature sensor is arranged in the HC injection system; under the condition that the upstream pressure and temperature sensor is determined to have the fault that the stitch sequence is reversely connected, the prompt information is triggered to prompt the upstream pressure and temperature sensor to have the fault, so that the problem that the engine cannot normally work due to the fact that the upstream pressure and temperature sensor of the HC injection system has the fault that the stitch sequence is reversely connected in the prior art is solved, and the effect of timely prompting the upstream pressure and temperature sensor to have the fault is achieved.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.
The embodiment of the invention also provides a device for determining the sensor fault in the HC injection system, and it should be noted that the device for determining the sensor fault in the HC injection system of the embodiment of the invention can be used for executing the method for determining the sensor fault in the HC injection system provided by the embodiment of the invention. A description will be given below of a sensor malfunction determination apparatus in an HC injection system according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a sensor malfunction determination apparatus in an HC injection system according to an embodiment of the present invention. As shown in fig. 3, the apparatus includes: the determining unit 301 is configured to obtain a plurality of working condition parameters corresponding to a target vehicle, and determine whether the plurality of working condition parameters respectively satisfy a plurality of preset conditions corresponding to the plurality of working condition parameters; the first obtaining unit 302 is configured to obtain an upstream pressure value and an upstream temperature value corresponding to the HC injection system when the plurality of working condition parameters respectively meet respective corresponding preset conditions, where the HC injection system is disposed in an engine of a target vehicle, the upstream pressure value is a fuel pressure value of the engine, and the upstream temperature value is a fuel temperature value of the engine; a first determining unit 303, configured to determine whether a stitch reverse fault occurs in an upstream pressure and temperature sensor according to an upstream pressure value and an upstream temperature value, where the upstream pressure and temperature sensor is disposed in the HC injection system; and the triggering unit 304 is used for triggering prompt information to prompt the upstream pressure and temperature sensor to have a fault when the upstream pressure and temperature sensor is determined to have a reverse stitch sequence fault.
In an alternative example, the determining unit 301 includes: the first acquiring subunit is used for acquiring the current rotating speed of the engine; a second acquisition subunit configured to acquire a state of the HC injection system, the state being any one of: non-fault state, fault state; the third acquiring subunit is used for acquiring the environment temperature corresponding to the space where the target vehicle is located; and a fourth acquisition subunit, configured to acquire a battery voltage of the target vehicle.
In an alternative example, the determining unit 301 includes: the first judging subunit is used for judging whether the current rotating speed meets a first preset condition, wherein the first preset condition is that the current rotating speed is smaller than a preset rotating speed; the second judgment subunit is used for judging whether the HC injection system meets a second preset condition, wherein the second preset condition is that the HC injection system is in a non-fault state; the third judging subunit is configured to judge whether the ambient temperature meets a third preset condition, where the third preset condition is that the ambient temperature is greater than the preset ambient temperature; and the fourth judging subunit is used for judging whether the voltage meets a fourth preset condition, wherein the fourth preset condition is that the voltage is greater than the preset voltage.
In an alternative example, the first determining unit 303 includes: a fifth judging subunit, for judging whether the upstream pressure value is greater than the first value; a sixth judging subunit, configured to judge whether the upstream temperature value is greater than the second value; the determining subunit is used for determining that the preset value is increased by one under the condition that the upstream pressure value is greater than the first value and the upstream temperature value is greater than the second value; and the fifth acquiring subunit is used for acquiring the total number corresponding to the preset value in real time and determining whether the upstream pressure and temperature sensor has a stitch sequence reverse connection fault according to the total number.
In an optional example, the fifth obtaining subunit includes: the comparison module is used for comparing the total number with a preset threshold value; the first determining module is used for determining that the upstream pressure and temperature sensor has a stitch sequence reverse connection fault under the condition that the total number is greater than a preset threshold value; and the second determination module is used for determining that the pin sequence reverse fault does not occur in the upstream pressure and temperature sensor under the condition that the total number is less than or equal to the preset threshold value.
In an optional example, the apparatus further comprises: the second obtaining unit is used for obtaining a first numerical value range before judging whether the upstream pressure value is larger than the first numerical value or not, and determining the maximum value corresponding to the first numerical value range as the first numerical value; the device still includes: and the third acquisition unit acquires the second numerical value range before judging whether the upstream temperature value is larger than the second numerical value, and determines the maximum value corresponding to the second numerical value range as the second numerical value.
In an optional example, the apparatus further comprises: and the second determining unit is used for determining whether the target vehicle is in a preset state before a plurality of working condition parameters corresponding to the target vehicle are obtained, and entering a judging process for judging whether the engine has a fault or not under the condition that the target vehicle is in the preset state, wherein the preset state is a state that an engine electronic control unit of the target vehicle is started and a state that the engine is not started within a preset time period.
The device for determining the sensor fault in the HC injection system provided by the embodiment of the invention is used for acquiring a plurality of working condition parameters corresponding to a target vehicle and judging whether the plurality of working condition parameters respectively satisfy a plurality of preset conditions corresponding to the plurality of working condition parameters through the judging unit 301; the first obtaining unit 302 is configured to obtain an upstream pressure value and an upstream temperature value corresponding to the HC injection system when the plurality of working condition parameters respectively meet respective corresponding preset conditions, where the HC injection system is disposed in an engine of a target vehicle, the upstream pressure value is a fuel pressure value of the engine, and the upstream temperature value is a fuel temperature value of the engine; a first determination unit 303 for determining whether a stitch reverse failure has occurred in an upstream pressure temperature sensor according to an upstream pressure value and an upstream temperature value, wherein the upstream pressure temperature sensor is provided in the HC injection system; the triggering unit 304 is configured to trigger the prompt information to prompt the upstream pressure and temperature sensor to malfunction when it is determined that the upstream pressure and temperature sensor malfunctions in reverse order of stitch, so that the problem that the engine cannot work normally due to reverse tie of the upstream pressure and temperature sensor of the HC injection system in the related art is solved, and the effect of timely prompting the upstream pressure and temperature sensor to malfunction is achieved.
The device for determining the sensor fault in the HC injection system comprises a processor and a memory, wherein the judging unit 301 and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions.
The processor comprises a kernel, and the kernel calls the corresponding program unit from the memory. One or more than one kernel can be set, and the condition that the upstream pressure and temperature sensor of the HC injection system is reversely connected with the line beam in the related art is solved by adjusting the parameters of the kernels.
The memory may include volatile memory in a computer readable medium, Random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory includes at least one memory chip.
An embodiment of the present invention provides a computer-readable storage medium having stored thereon a program that, when executed by a processor, implements the method for determining a sensor failure in an HC injection system.
An embodiment of the invention provides a processor for running a program, wherein the program runs to execute the method for determining the sensor fault in the HC injection system.
The embodiment of the invention provides equipment, which comprises a processor, a memory and a program which is stored on the memory and can run on the processor, wherein the processor executes the program and realizes the following steps: acquiring a plurality of working condition parameters corresponding to a target vehicle, and judging whether the working condition parameters respectively meet a plurality of preset conditions corresponding to the working condition parameters; under the condition that the working condition parameters respectively meet corresponding preset conditions, acquiring an upstream pressure value and an upstream temperature value corresponding to the HC injection system, wherein the HC injection system is arranged in an engine of a target vehicle, the upstream pressure value is a fuel pressure value of the engine, and the upstream temperature value is a fuel temperature value of the engine; determining whether a stitch reverse fault occurs on an upstream pressure and temperature sensor according to an upstream pressure value and an upstream temperature value, wherein the upstream pressure and temperature sensor is arranged in the HC injection system; and under the condition that the upstream pressure and temperature sensor is determined to have a stitch reverse order fault, triggering prompt information to prompt the upstream pressure and temperature sensor to have a fault.
Further, acquiring a plurality of working condition parameters corresponding to the target vehicle, including: acquiring the current rotating speed of the engine; acquiring the state of the HC injection system, wherein the state is any one of the following states: non-fault state, fault state; acquiring an ambient temperature corresponding to a space where a target vehicle is located; the battery voltage of the target vehicle is acquired.
Further, respectively judging whether the plurality of working condition parameters satisfy a plurality of preset conditions corresponding to the plurality of working condition parameters, including: judging whether the current rotating speed meets a first preset condition, wherein the first preset condition is that the current rotating speed is smaller than a preset rotating speed; judging whether the HC injection system meets a second preset condition or not, wherein the second preset condition is that the HC injection system is in a non-fault state; judging whether the ambient temperature meets a third preset condition, wherein the third preset condition is that the ambient temperature is higher than the preset ambient temperature; and judging whether the voltage meets a fourth preset condition, wherein the fourth preset condition is that the voltage is greater than the preset voltage.
Further, determining whether the upstream pressure and temperature sensor has a reverse stitch sequence fault according to the upstream pressure value and the upstream temperature value, includes: judging whether the upstream pressure value is larger than a first value or not; judging whether the upstream temperature value is larger than a second value or not; determining a preset value plus one under the condition that the upstream pressure value is greater than a first value and the upstream temperature value is greater than a second value; and acquiring the total number corresponding to the preset value in real time, and determining whether the upstream pressure and temperature sensor has a stitch sequence reverse connection fault according to the total number.
Further, acquiring the total number corresponding to the preset value in real time, and determining whether the upstream pressure and temperature sensor has a stitch sequence reverse fault according to the total number, wherein the method comprises the following steps of: comparing the total number with a preset threshold value; determining that the upstream pressure and temperature sensor has a stitch sequence reverse fault when the total number is greater than a preset threshold value; and determining that the upstream pressure and temperature sensor has no stitch sequence reverse fault when the sum is less than or equal to the preset threshold value.
Further, before determining whether the upstream pressure value is greater than the first value, the method further comprises: acquiring a first numerical range, and determining a maximum value corresponding to the first numerical range as a first numerical value; before determining whether the upstream temperature value is greater than the second value, the method further comprises: and acquiring a second numerical range, and determining the maximum value corresponding to the second numerical range as a second numerical value.
Further, before obtaining a plurality of operating condition parameters corresponding to the target vehicle, the method further includes: determining whether the target vehicle is in a preset state, and entering a determination process for determining whether the engine is in a fault state under the condition that the target vehicle is in the preset state, wherein the preset state is a state that an engine electronic control unit of the target vehicle is started and a state that the engine is not started within a preset time period.
The device herein may be a server, a PC, a PAD, a mobile phone, etc.
The invention also provides a computer program product adapted to perform a program for initializing the following method steps when executed on a data processing device: acquiring a plurality of working condition parameters corresponding to a target vehicle, and judging whether the working condition parameters respectively meet a plurality of preset conditions corresponding to the working condition parameters; under the condition that the working condition parameters respectively meet corresponding preset conditions, acquiring an upstream pressure value and an upstream temperature value corresponding to the HC injection system, wherein the HC injection system is arranged in an engine of a target vehicle, the upstream pressure value is a fuel pressure value of the engine, and the upstream temperature value is a fuel temperature value of the engine; determining whether a stitch reverse fault occurs on an upstream pressure and temperature sensor according to an upstream pressure value and an upstream temperature value, wherein the upstream pressure and temperature sensor is arranged in the HC injection system; and under the condition that the upstream pressure and temperature sensor is determined to have a stitch reverse order fault, triggering prompt information to prompt the upstream pressure and temperature sensor to have a fault.
Further, acquiring a plurality of working condition parameters corresponding to the target vehicle, including: acquiring the current rotating speed of the engine; acquiring the state of the HC injection system, wherein the state is any one of the following states: non-fault state, fault state; acquiring an ambient temperature corresponding to a space where a target vehicle is located; the battery voltage of the target vehicle is acquired.
Further, respectively judging whether the plurality of working condition parameters satisfy a plurality of preset conditions corresponding to the plurality of working condition parameters, including: judging whether the current rotating speed meets a first preset condition, wherein the first preset condition is that the current rotating speed is smaller than a preset rotating speed; judging whether the HC injection system meets a second preset condition or not, wherein the second preset condition is that the HC injection system is in a non-fault state; judging whether the ambient temperature meets a third preset condition, wherein the third preset condition is that the ambient temperature is higher than the preset ambient temperature; and judging whether the voltage meets a fourth preset condition, wherein the fourth preset condition is that the voltage is greater than the preset voltage.
Further, determining whether the upstream pressure and temperature sensor has a reverse stitch sequence fault according to the upstream pressure value and the upstream temperature value, includes: judging whether the upstream pressure value is larger than a first value or not; judging whether the upstream temperature value is larger than a second value or not; determining a preset value plus one under the condition that the upstream pressure value is greater than a first value and the upstream temperature value is greater than a second value; and acquiring the total number corresponding to the preset value in real time, and determining whether the upstream pressure and temperature sensor has a stitch sequence reverse fault according to the total number.
Further, the method includes the steps of acquiring the total number corresponding to the preset value in real time, and determining whether the upstream pressure and temperature sensor has a stitch sequence reverse fault according to the total number, wherein the method includes the following steps: comparing the total number with a preset threshold value; determining that the pins of the upstream pressure and temperature sensor are in reverse connection fault in sequence when the total number is greater than a preset threshold value; and determining that the upstream pressure and temperature sensor has no stitch sequence reverse fault when the sum is less than or equal to the preset threshold value.
Further, before determining whether the upstream pressure value is greater than the first value, the method further comprises: acquiring a first numerical range, and determining a maximum value corresponding to the first numerical range as a first numerical value; before determining whether the upstream temperature value is greater than the second value, the method further comprises: and acquiring a second numerical range, and determining the maximum value corresponding to the second numerical range as a second numerical value.
Further, before obtaining a plurality of operating condition parameters corresponding to the target vehicle, the method further includes: determining whether the target vehicle is in a preset state, and entering a judging process of judging whether the engine is in a fault state or not under the condition that the target vehicle is in the preset state, wherein the preset state is a state that an engine electronic control unit of the target vehicle is started and a state that the engine is not started within a preset time period.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). The memory is an example of a computer-readable medium.
Computer-readable media, including both permanent and non-permanent, removable and non-removable media, may implement the information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The above are merely examples of the present invention, and are not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. A method of determining a sensor fault in an HC injection system, comprising:
acquiring a plurality of working condition parameters corresponding to a target vehicle, and judging whether the working condition parameters respectively meet a plurality of preset conditions corresponding to the working condition parameters;
under the condition that the working condition parameters respectively meet the corresponding preset conditions, acquiring an upstream pressure value and an upstream temperature value corresponding to an HC injection system, wherein the HC injection system is arranged in an engine of the target vehicle, the upstream pressure value is a fuel pressure value of the engine, and the upstream temperature value is a fuel temperature value of the engine;
determining whether a stitch reverse fault occurs to an upstream pressure and temperature sensor according to the upstream pressure value and an upstream temperature value, wherein the upstream pressure and temperature sensor is arranged in the HC injection system;
and under the condition that the upstream pressure and temperature sensor is determined to have the reverse connection fault of the stitch sequence, triggering prompt information to prompt the upstream pressure and temperature sensor to have the fault.
2. The method of claim 1, wherein obtaining a plurality of operating condition parameters corresponding to the target vehicle comprises:
acquiring the current rotating speed of the engine;
acquiring a state of the HC injection system, the state being any one of: non-fault state, fault state;
acquiring the environment temperature corresponding to the space where the target vehicle is located;
and acquiring the battery voltage of the target vehicle.
3. The method of claim 2, wherein separately determining whether the plurality of operating condition parameters satisfy a plurality of preset conditions corresponding to the plurality of operating condition parameters comprises:
judging whether the current rotating speed meets a first preset condition, wherein the first preset condition is that the current rotating speed is smaller than a preset rotating speed;
judging whether the HC injection system meets a second preset condition, wherein the second preset condition is that the HC injection system is in the non-fault state;
judging whether the environment temperature meets a third preset condition, wherein the third preset condition is that the environment temperature is higher than a preset environment temperature;
and judging whether the voltage meets a fourth preset condition, wherein the fourth preset condition is that the voltage is greater than a preset voltage.
4. The method of claim 1, wherein determining whether the upstream pressure temperature sensor has a reverse pin sequence failure based on the upstream pressure value and the upstream temperature value comprises:
judging whether the upstream pressure value is larger than a first value or not;
judging whether the upstream temperature value is larger than a second value or not;
determining a preset value plus one if the upstream pressure value is greater than the first value and the upstream temperature value is greater than the second value;
and acquiring the total number corresponding to the preset numerical value in real time, and determining whether the upstream pressure and temperature sensor has the reverse connection fault of the pin sequence according to the total number.
5. The method according to claim 4, wherein the step of acquiring a total number corresponding to the preset value in real time and determining whether the upstream pressure and temperature sensor has the reverse stitch sequence fault according to the total number comprises the steps of:
comparing the total number with a preset threshold value;
determining that the upstream pressure and temperature sensor has the reverse stitch sequence connection fault when the total number is larger than the preset threshold value;
determining that the upstream pressure temperature sensor has not failed the reverse stitch order if the total number is less than or equal to the preset threshold.
6. The method of claim 4,
before determining whether the upstream pressure value is greater than a first value, the method further comprises:
acquiring a first numerical range, and determining a maximum value corresponding to the first numerical range as the first numerical value;
before determining whether the upstream temperature value is greater than a second value, the method further comprises:
and acquiring a second numerical range, and determining the maximum value corresponding to the second numerical range as the second numerical value.
7. The method of claim 1, wherein prior to obtaining the plurality of operating condition parameters corresponding to the target vehicle, the method further comprises:
determining whether the target vehicle is in a preset state, and entering a determination process for determining whether the engine has a fault or not under the condition that the target vehicle is in the preset state, wherein the preset state is a state that an engine electronic control unit of the target vehicle is started and a state that the engine is not started within a preset time period.
8. An apparatus for determining a sensor failure in an HC injection system, comprising:
the judging unit is used for acquiring a plurality of working condition parameters corresponding to the target vehicle and judging whether the working condition parameters respectively meet a plurality of preset conditions corresponding to the working condition parameters;
the device comprises a first obtaining unit, a second obtaining unit and a control unit, wherein the first obtaining unit is used for obtaining an upstream pressure value and an upstream temperature value corresponding to an HC injection system under the condition that a plurality of working condition parameters respectively meet the preset conditions corresponding to the working condition parameters, the HC injection system is arranged in an engine of the target vehicle, the upstream pressure value is a fuel pressure value of the engine, and the upstream temperature value is a fuel temperature value of the engine;
a first determination unit, configured to determine whether a reverse stitch sequence fault occurs in an upstream pressure and temperature sensor according to the upstream pressure value and an upstream temperature value, where the upstream pressure and temperature sensor is disposed in the HC injection system;
and the triggering unit is used for triggering prompt information to prompt the upstream pressure and temperature sensor to have a fault under the condition that the upstream pressure and temperature sensor is determined to have the reverse connection fault of the stitch sequence.
9. A computer-readable storage medium, comprising a stored program, wherein the program, when executed, controls an apparatus in which the computer-readable storage medium is located to perform a method of determining a sensor failure in an HC injection system, according to any one of claims 1 to 7.
10. A processor, characterized in that the processor is configured to run a program, wherein the program is run to perform a method of determining a sensor failure in an HC injection system according to any of claims 1 to 7.
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