CN111982519A - Method, device and equipment for detecting abnormal sound of gasoline engine and storage medium - Google Patents
Method, device and equipment for detecting abnormal sound of gasoline engine and storage medium Download PDFInfo
- Publication number
- CN111982519A CN111982519A CN202010906944.0A CN202010906944A CN111982519A CN 111982519 A CN111982519 A CN 111982519A CN 202010906944 A CN202010906944 A CN 202010906944A CN 111982519 A CN111982519 A CN 111982519A
- Authority
- CN
- China
- Prior art keywords
- gasoline engine
- oil pressure
- detected
- noise
- abnormal noise
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/12—Testing internal-combustion engines by monitoring vibrations
Abstract
The invention discloses a method, a device, equipment and a storage medium for detecting abnormal sound of a gasoline engine, wherein the method comprises the steps of obtaining target abnormal sound noise of the gasoline engine to be detected under the idling working condition carried by a whole vehicle; after the engine oil pressure of the gasoline engine to be detected is increased, oil is injected, and the current abnormal noise of the gasoline engine to be detected is obtained; comparing the current abnormal noise with the target abnormal noise, and determining whether the abnormal noise source is related to a piston pin connecting rod mechanism of the gasoline engine to be detected according to the comparison result; the detection can be carried out under the carrying state of the whole engine, the engine does not need to be disassembled, a stand does not need to be arranged independently, an NVH test is not needed, the operation steps are simpler and more convenient, and the time for confirming the source of abnormal sound can be greatly shortened.
Description
Technical Field
The invention relates to the technical field of engine detection, in particular to a method, a device, equipment and a storage medium for detecting abnormal sound of a gasoline engine.
Background
When a full-floating gasoline engine is carried by a whole vehicle, if the gap design of a piston pin connecting rod is unreasonable or the gap is abnormal in the assembly process, very obvious metal knocking sound is easy to occur when the vehicle idles, and because a noise excitation source is in the engine, the existing scheme is to identify the abnormal sound problem excitation source by detecting the piston pin connecting rod gap, the piston pin clamp spring gap and the piston pin piston gap; in the prior art, an engine needs to be detached from a whole vehicle, a stand is arranged independently for testing, a large amount of resources are generally required to be coordinated, and a large amount of labor cost and time cost are spent.
Disclosure of Invention
The invention mainly aims to provide a method, a device, equipment and a storage medium for detecting abnormal sound of a gasoline engine, and aims to solve the technical problems that in the prior art, the detection of the abnormal sound of the gasoline engine needs to be carried out by independently arranging a stand for testing, a large amount of resources are generally required to be coordinated, and a large amount of labor cost and time cost are consumed.
In a first aspect, the present invention provides a method for detecting abnormal sound of a gasoline engine, comprising the steps of:
acquiring target abnormal noise of a gasoline engine to be detected under an idling working condition carried by a whole vehicle;
injecting oil after the engine oil pressure of the gasoline engine to be detected is increased, and acquiring the current abnormal noise of the gasoline engine to be detected;
and comparing the current abnormal noise with the target abnormal noise, and determining whether an abnormal noise source is related to a piston pin connecting rod mechanism of the gasoline engine to be detected according to a comparison result.
Optionally, the step of injecting oil after the engine oil pressure of the gasoline engine to be detected is increased to obtain the current abnormal noise of the gasoline engine to be detected includes:
increasing the oil pressure of the gasoline engine to be detected, and opening a piston cooling nozzle to spray oil to a target position after the oil pressure is increased, wherein the target position is located at a piston pin connecting rod of the gasoline engine to be detected;
and acquiring the current abnormal noise of the gasoline engine to be detected.
Optionally, the increasing the oil pressure of the gasoline engine to be detected, and after the oil pressure is increased, opening a piston cooling nozzle to inject oil to the target position includes:
increasing the oil pressure of the gasoline engine to be detected according to a preset oil pressure increasing proportion;
after the oil pressure is increased, acquiring a current oil pressure value, and comparing the current oil pressure value with a preset oil pressure value;
and judging whether to open a piston cooling nozzle to spray oil at the target position according to the comparison magnitude relation between the current oil pressure value and the preset oil pressure value.
Optionally, the increasing the oil pressure of the gasoline engine to be detected according to a preset oil pressure increase ratio includes:
setting a preset oil pressure increasing proportion through an engine management system;
and adjusting the duty ratio of the motor of the oil pump according to the preset oil pressure increasing proportion so as to increase the oil pressure of the gasoline engine to be detected.
Optionally, the determining whether to open a piston cooling nozzle to inject oil to a target position according to a magnitude relation between the current oil pressure value and the preset oil pressure value includes:
when the current oil pressure value is smaller than the preset oil pressure value, oil injection is carried out on the target position without opening a piston cooling nozzle;
and when the current oil pressure value is not less than the preset oil pressure value, modifying the idling condition through a preset engine management system command, and starting a piston cooling nozzle to inject oil to the target position.
Optionally, the comparing the current abnormal noise with the target abnormal noise, and determining whether an abnormal noise source is related to the piston pin connecting rod mechanism of the gasoline engine to be detected according to the comparison result includes:
comparing the current abnormal noise with the target abnormal noise to obtain a comparison result;
obtaining a noise decibel difference value of the target abnormal noise and the current abnormal noise from the comparison result;
and determining whether the abnormal sound source is related to a piston pin connecting rod mechanism of the gasoline engine to be detected according to the size relation between the noise decibel difference value and a preset decibel threshold value.
Optionally, the determining, according to a magnitude relationship between the noise decibel difference value and a preset decibel threshold, whether an abnormal sound source is related to a piston pin connecting rod mechanism of the gasoline engine to be detected includes:
when the noise decibel difference value is smaller than a preset decibel threshold value, judging that the source of abnormal sound is irrelevant to a piston pin connecting rod mechanism of the gasoline engine to be detected;
and when the noise decibel difference value is not less than a preset decibel threshold value, judging that the source of abnormal sound is related to a piston pin connecting rod mechanism of the gasoline engine to be detected.
In a second aspect, the present invention further provides a device for detecting abnormal sound of a gasoline engine, including:
the noise acquisition module is used for acquiring target abnormal noise of the gasoline engine to be detected under the idling working condition carried by the whole vehicle;
the boosting oil injection module is used for injecting oil after the engine oil pressure of the gasoline engine to be detected is increased, and obtaining the current abnormal noise of the gasoline engine to be detected;
and the detection module is used for comparing the current abnormal sound noise with the target abnormal sound noise and determining whether an abnormal sound source is related to a piston pin connecting rod mechanism of the gasoline engine to be detected according to a comparison result.
In a third aspect, the present invention further provides a detection apparatus for abnormal sound of a gasoline engine, including: the detection method comprises a memory, a processor and a detection program of the abnormal noise of the gasoline engine, wherein the detection program of the abnormal noise of the gasoline engine is stored in the memory and can run on the processor, and is configured to realize the steps of the detection method of the abnormal noise of the gasoline engine.
In a fourth aspect, the present invention further provides a storage medium, where a detection program of the abnormal sound of the gasoline engine is stored, and when the detection program of the abnormal sound of the gasoline engine is executed by a processor, the steps of the detection method of the abnormal sound of the gasoline engine as described above are implemented.
The method for detecting the abnormal sound of the gasoline engine comprises the steps of obtaining the target abnormal sound noise of the gasoline engine to be detected under the idling working condition carried by the whole vehicle; injecting oil after the engine oil pressure of the gasoline engine to be detected is increased, and acquiring the current abnormal noise of the gasoline engine to be detected; comparing the current abnormal noise with the target abnormal noise, and determining whether an abnormal noise source is related to a piston pin connecting rod mechanism of the gasoline engine to be detected according to a comparison result; the detection can be carried out in the whole vehicle carrying state of the engine, the engine does not need to be disassembled, a stand does not need to be arranged independently, and an NVH test does not need to be passed, so that the operation steps are simpler and more convenient, and the time for confirming the abnormal sound source can be greatly shortened; and can realize long-range oil spout during the idle operating mode, original oil spout system can, need not to set up oil spout system in addition.
Drawings
FIG. 1 is a schematic diagram of an apparatus architecture of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a method for detecting abnormal noise of a gasoline engine according to a first embodiment of the present invention;
FIG. 3 is a schematic flow chart of a method for detecting abnormal noise of a gasoline engine according to a second embodiment of the present invention;
FIG. 4 is a schematic flow chart of a method for detecting abnormal noise of a gasoline engine according to a third embodiment of the present invention;
FIG. 5 is a schematic flow chart of a method for detecting abnormal noise of a gasoline engine according to a fourth embodiment of the present invention;
FIG. 6 is a flow chart illustrating a fifth embodiment of the method for detecting abnormal noise in a gasoline engine according to the present invention;
fig. 7 is a functional block diagram of the first embodiment of the detection apparatus for abnormal noise of a gasoline engine of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The solution of the embodiment of the invention is mainly as follows: obtaining target abnormal noise of a gasoline engine to be detected under an idling working condition carried by the whole vehicle; injecting oil after the engine oil pressure of the gasoline engine to be detected is increased, and acquiring the current abnormal noise of the gasoline engine to be detected; comparing the current abnormal noise with the target abnormal noise, and determining whether an abnormal noise source is related to a piston pin connecting rod mechanism of the gasoline engine to be detected according to a comparison result; the detection can be carried out in the whole vehicle carrying state of the engine, the engine does not need to be disassembled, a stand does not need to be arranged independently, and an NVH test does not need to be passed, so that the operation steps are simpler and more convenient, and the time for confirming the abnormal sound source can be greatly shortened; and can realize long-range oil spout during idle operating mode, original fuel injection system can, need not to set up the fuel injection system in addition, solved among the prior art detect the gasoline engine abnormal sound need arrange the rack alone and test, need coordinate a large amount of resources usually to cost a large amount of human costs and time cost, and detect the precision and hang down, to the big technical problem of loss of engine.
Referring to fig. 1, fig. 1 is a schematic device structure diagram of a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the apparatus may include: a processor 1001, such as a CPU, a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., a Wi-Fi interface). The Memory 1005 may be a high-speed RAM Memory or a Non-Volatile Memory (Non-Volatile Memory), such as a disk Memory. The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the configuration of the apparatus shown in fig. 1 is not intended to be limiting of the apparatus and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a storage medium, may include therein an operating system, a network communication module, a user interface module, and a gasoline engine abnormal sound detection program.
The apparatus of the present invention calls a detection program of the abnormal gasoline engine sound stored in the memory 1005 by the processor 1001, and performs the following operations:
acquiring target abnormal noise of a gasoline engine to be detected under an idling working condition carried by a whole vehicle;
injecting oil after the engine oil pressure of the gasoline engine to be detected is increased, and acquiring the current abnormal noise of the gasoline engine to be detected;
and comparing the current abnormal noise with the target abnormal noise, and determining whether an abnormal noise source is related to a piston pin connecting rod mechanism of the gasoline engine to be detected according to a comparison result.
Further, the processor 1001 may call the detection program of the abnormal gasoline engine noise stored in the memory 1005, and also perform the following operations:
increasing the oil pressure of the gasoline engine to be detected, and opening a piston cooling nozzle to spray oil to a target position after the oil pressure is increased, wherein the target position is located at a piston pin connecting rod of the gasoline engine to be detected;
and acquiring the current abnormal noise of the gasoline engine to be detected.
Further, the processor 1001 may call the detection program of the abnormal gasoline engine noise stored in the memory 1005, and also perform the following operations:
increasing the oil pressure of the gasoline engine to be detected according to a preset oil pressure increasing proportion;
after the oil pressure is increased, acquiring a current oil pressure value, and comparing the current oil pressure value with a preset oil pressure value;
and judging whether to open a piston cooling nozzle to spray oil at the target position according to the comparison magnitude relation between the current oil pressure value and the preset oil pressure value.
Further, the processor 1001 may call the detection program of the abnormal gasoline engine noise stored in the memory 1005, and also perform the following operations:
setting a preset oil pressure increasing proportion through an engine management system;
and adjusting the duty ratio of the motor of the oil pump according to the preset oil pressure increasing proportion so as to increase the oil pressure of the gasoline engine to be detected.
Further, the processor 1001 may call the detection program of the abnormal gasoline engine noise stored in the memory 1005, and also perform the following operations:
when the current oil pressure value is smaller than the preset oil pressure value, oil injection is carried out on the target position without opening a piston cooling nozzle;
and when the current oil pressure value is not less than the preset oil pressure value, modifying the idling condition through a preset engine management system command, and starting a piston cooling nozzle to inject oil to the target position.
Further, the processor 1001 may call the detection program of the abnormal gasoline engine noise stored in the memory 1005, and also perform the following operations:
comparing the current abnormal noise with the target abnormal noise to obtain a comparison result;
obtaining a noise decibel difference value of the target abnormal noise and the current abnormal noise from the comparison result;
and determining whether the abnormal sound source is related to a piston pin connecting rod mechanism of the gasoline engine to be detected according to the size relation between the noise decibel difference value and a preset decibel threshold value.
Further, the processor 1001 may call the detection program of the abnormal gasoline engine noise stored in the memory 1005, and also perform the following operations:
when the noise decibel difference value is smaller than a preset decibel threshold value, judging that the source of abnormal sound is irrelevant to a piston pin connecting rod mechanism of the gasoline engine to be detected;
and when the noise decibel difference value is not less than a preset decibel threshold value, judging that the source of abnormal sound is related to a piston pin connecting rod mechanism of the gasoline engine to be detected.
According to the scheme, the target abnormal noise of the gasoline engine to be detected under the idling working condition carried by the whole vehicle is obtained; injecting oil after the engine oil pressure of the gasoline engine to be detected is increased, and acquiring the current abnormal noise of the gasoline engine to be detected; comparing the current abnormal noise with the target abnormal noise, and determining whether an abnormal noise source is related to a piston pin connecting rod mechanism of the gasoline engine to be detected according to a comparison result; the detection can be carried out in the whole vehicle carrying state of the engine, the engine does not need to be disassembled, a stand does not need to be arranged independently, and an NVH test does not need to be passed, so that the operation steps are simpler and more convenient, and the time for confirming the abnormal sound source can be greatly shortened; and can realize long-range oil spout during the idle operating mode, original oil spout system can, need not to set up oil spout system in addition.
Based on the hardware structure, the embodiment of the method for detecting the abnormal sound of the gasoline engine is provided.
Referring to fig. 2, fig. 2 is a schematic flow chart of a method for detecting abnormal noise of a gasoline engine according to a first embodiment of the present invention.
In a first embodiment, the method for detecting abnormal noise of a gasoline engine comprises the following steps:
and S10, acquiring the target abnormal noise of the gasoline engine to be detected under the idling working condition carried by the whole vehicle.
It should be noted that the gasoline engine to be detected is a gasoline engine with abnormal sound, the gasoline engine to be detected can be a full-floating gasoline engine or a semi-floating gasoline engine, when the gasoline engine is carried in a whole vehicle, if the design of the piston pin connecting rod gap is not reasonable or the gap is abnormal in the assembly process, very obvious metal knocking sound and abnormal sound noise are easily generated when the vehicle is idling, at the moment, the target abnormal sound noise of the gasoline engine under the idling working condition carried in the whole vehicle can be obtained, and the subsequent detection and determination of the excitation source of the abnormal sound noise are facilitated.
And step S20, injecting oil after the engine oil pressure of the gasoline engine to be detected is increased, and acquiring the current abnormal noise of the gasoline engine to be detected.
It should be understood that, because the oil pressure of the gasoline engine can not rise under the idling condition, and the oil pressure of the original oil injection system is insufficient, the oil can not be injected to the piston pin connecting rod which emits abnormal sound, so that misjudgment of the source of the abnormal sound is caused, the defect that the oil pressure is insufficient under the idling condition can be overcome after the gasoline engine to be detected is pressurized, oil injection is performed at the moment, the oil can be accurately injected to the piston pin connecting rod, the abnormal sound generated by knocking of the piston pin connecting rod is improved, and the abnormal sound noise of the gasoline engine to be detected is obtained again at the moment and serves as the current abnormal sound noise.
And step S30, comparing the current abnormal sound noise with the target abnormal sound noise, and determining whether an abnormal sound source is related to the piston pin connecting rod mechanism of the gasoline engine to be detected according to the comparison result.
It can be understood that, by comparing the current abnormal noise with the target abnormal noise, whether the abnormal noise is reduced or not can be determined according to the comparison result, so that whether the abnormal noise source is related to the piston pin connecting rod mechanism of the gasoline engine to be detected or not can be determined.
According to the scheme, the target abnormal noise of the gasoline engine to be detected under the idling working condition carried by the whole vehicle is obtained; injecting oil after the engine oil pressure of the gasoline engine to be detected is increased, and acquiring the current abnormal noise of the gasoline engine to be detected; comparing the current abnormal noise with the target abnormal noise, and determining whether an abnormal noise source is related to a piston pin connecting rod mechanism of the gasoline engine to be detected according to a comparison result; the detection can be carried out in the whole vehicle carrying state of the engine, the engine does not need to be disassembled, a stand does not need to be arranged independently, and an NVH test does not need to be passed, so that the operation steps are simpler and more convenient, and the time for confirming the abnormal sound source can be greatly shortened; and can realize long-range oil spout during the idle operating mode, original oil spout system can, need not to set up oil spout system in addition.
Further, fig. 3 is a schematic flow chart of a second embodiment of the method for detecting abnormal sound of a gasoline engine according to the present invention, and as shown in fig. 3, the second embodiment of the method for detecting abnormal sound of a gasoline engine according to the present invention is proposed based on the first embodiment, and in this embodiment, the step S20 specifically includes the following steps:
and step S21, increasing the oil pressure of the gasoline engine to be detected, and opening a piston cooling nozzle to spray oil to a target position after the oil pressure is increased, wherein the target position is located at a piston pin connecting rod of the gasoline engine to be detected.
It should be noted that, after the oil pressure of the gasoline engine to be detected is increased, a Piston Cooling nozzle (PCJ) may be opened to inject oil to a target position, where the target position is located at a Piston pin connecting rod of the gasoline engine to be detected, the target position may be generally set as a Piston pin connecting rod position, and of course, the target position may also be set as another position in a Piston pin, for example, a Piston pin snap spring position or a Piston pin Piston gap position, and the embodiment is not limited thereto.
And step S22, acquiring the current abnormal noise of the gasoline engine to be detected.
It can be understood that after the piston cooling nozzle is opened to inject oil to the target position, the abnormal noise of the gasoline engine to be measured at this time, that is, the current abnormal noise, may be obtained, of course, the number of times of oil injection may be one, or may be obtained after multiple times of oil injection, and the number of times of oil injection may be adjusted according to the preset number of times or the actual situation, which is not limited in this embodiment.
According to the scheme, the oil pressure of the gasoline engine to be detected is increased, and after the oil pressure is increased, a piston cooling nozzle is opened to spray oil to a target position, wherein the target position is located at a piston pin connecting rod of the gasoline engine to be detected; the method has the advantages that the current abnormal sound noise of the gasoline engine to be detected is obtained, whether the position of the abnormal sound is located in the piston pin of the gasoline engine to be detected can be accurately judged, the accuracy and the efficiency of the judgment of the abnormal sound noise are improved, the engine does not need to be disassembled, a rack does not need to be arranged independently, an NVH (noise vibration and harshness) test does not need to be passed, operation steps are simpler and more convenient, and the time for confirming the source of the abnormal sound can be greatly shortened.
Further, fig. 4 is a schematic flow chart of a third embodiment of the method for detecting abnormal sound of a gasoline engine according to the present invention, and as shown in fig. 4, the third embodiment of the method for detecting abnormal sound of a gasoline engine according to the present invention is proposed based on the second embodiment, and in this embodiment, the step S21 specifically includes the following steps:
and S211, increasing the oil pressure of the gasoline engine to be detected according to a preset oil pressure increasing proportion.
It should be noted that the preset oil pressure increase proportion is a preset oil pressure increase proportion numerical value, and the oil pressure of the gasoline engine to be detected can be accurately increased through the preset oil pressure increase proportion.
And S212, acquiring a current oil pressure value after the oil pressure is increased, and comparing the current oil pressure value with a preset oil pressure value.
It can be understood that the preset oil pressure value is a preset oil pressure injection threshold, and the preset oil pressure value may be obtained through training of a large amount of experimental data, may be an oil pressure threshold determined according to daily operation experience of a technician, and may also be an oil pressure threshold adjusted in time according to an actual situation, which is not limited in this embodiment; after the oil pressure is increased, the current oil pressure value data can be determined and compared according to the preset oil pressure value, so that whether the current oil pressure meets the precondition of injection or not is determined, and the oil can be accurately injected to the target position.
And step S213, judging whether to open a piston cooling nozzle to spray oil at the target position according to the comparison of the current oil pressure value and the preset oil pressure value.
It should be understood that after the current oil pressure value is compared with the preset oil pressure value, whether the piston cooling nozzle is opened to inject oil to the target position can be determined according to the magnitude relation of the current oil pressure value and the preset oil pressure value.
Further, the step S213 specifically includes the following steps:
when the current oil pressure value is smaller than the preset oil pressure value, oil injection is carried out on the target position without opening a piston cooling nozzle;
and when the current oil pressure value is not less than the preset oil pressure value, modifying the idling condition through a preset engine management system command, and starting a piston cooling nozzle to inject oil to the target position.
It can be understood that when the current oil pressure value is smaller than the preset oil pressure value, namely the oil pressure is insufficient, the piston cooling nozzle is not opened to inject oil to the target position; when the current oil pressure value is not less than the preset oil pressure value, the oil pressure meets the injection requirement, and the piston cooling nozzle can be opened to inject oil to the target position, so that abnormal sound generated by piston pin knocking is improved, and preparation is made for determining the subsequent abnormal sound position.
According to the scheme, the oil pressure of the gasoline engine to be detected is increased according to the preset oil pressure increasing proportion; after the oil pressure is increased, acquiring a current oil pressure value, and comparing the current oil pressure value with a preset oil pressure value; and judging whether to open the piston cooling nozzle to spray oil to the target position according to the comparison size relationship between the current oil pressure value and the preset oil pressure value, so that the piston cooling nozzle can be ensured to have enough and stable oil pressure to spray oil to the target position, and the abnormal sound detection speed and efficiency of the gasoline engine are improved.
Further, fig. 5 is a schematic flow chart of a fourth embodiment of the method for detecting abnormal noise of a gasoline engine according to the present invention, and as shown in fig. 5, the fourth embodiment of the method for detecting abnormal noise of a gasoline engine according to the present invention is proposed based on the third embodiment, in this embodiment, the step S211 specifically includes the following steps:
and step S2111, setting a preset oil pressure increasing proportion through an engine management system.
It should be noted that, the step of pressurizing the oil pressure may be to set a corresponding pressurizing parameter by an Engine Management System (EMS), that is, to set a preset oil pressure increase ratio to regulate the oil pressure.
And S2112, adjusting the duty ratio of an oil pump motor according to the preset oil pressure increasing proportion, so as to increase the oil pressure of the gasoline engine to be detected.
It can be understood that the duty ratio of the oil pump motor is adjusted according to the preset oil pressure increase proportion, and the duty ratio of the oil pump motor is rewritten to a corresponding oil pressure value through the EMS, and the adjusted oil pressure value is higher than the oil pressure value under the idle working condition.
In the concrete implementation, EMS data can be modified to duplicate the duty ratio of a high oil pump motor in the whole vehicle carrying state of the engine, so that the idling oil pressure reaches the maximum value, EMS data is modified, a PCJ signal is started under the idling working condition, after the two parts of EMS data are modified, continuous oil injection can be carried out on the position of the piston pin connecting rod through the PCJ at the time of abnormal sound generation, the lubrication of the piston pin connecting rod is improved, and if the abnormal sound is obviously reduced after the continuous oil injection, the problem of knocking sound can be accurately verified to be related to the piston pin connecting rod mechanism.
According to the scheme, the preset oil pressure increasing proportion is set through the engine management system; and adjusting the duty ratio of the motor of the oil pump according to the preset oil pressure increasing proportion so as to increase the oil pressure of the gasoline engine to be detected, accurately adjust the oil pressure to increase to a specified oil pressure value, ensure that oil is accurately sprayed to a target position, improve the accuracy and efficiency of abnormal sound noise judgment, enable the operation steps to be simpler and more convenient, and greatly shorten the time for confirming the abnormal sound source.
Further, fig. 6 is a schematic flow chart of a fifth embodiment of the method for detecting abnormal noise of a gasoline engine according to the present invention, and as shown in fig. 6, the fifth embodiment of the method for detecting abnormal noise of a gasoline engine according to the present invention is proposed based on the first embodiment, and in this embodiment, the step S30 specifically includes the following steps:
and step S31, comparing the current abnormal noise with the target abnormal noise to obtain a comparison result.
It should be noted that, by comparing the current abnormal noise with the target abnormal noise, it can be determined whether there is a difference between the frequency and decibel level of the two types of abnormal noise, so as to generate a corresponding comparison result.
And step S32, obtaining the noise decibel difference value of the target abnormal noise and the current abnormal noise from the comparison result.
It can be understood that a noise decibel difference between the target abnormal noise and the current abnormal noise can be obtained from the comparison result, and the noise decibel difference is a difference between the noise decibel of the target abnormal noise and the noise decibel of the current abnormal noise.
And step S33, determining whether the abnormal sound source is related to the piston pin connecting rod mechanism of the gasoline engine to be detected according to the relation between the noise decibel difference value and a preset decibel threshold value.
It should be understood that the preset decibel threshold is a preset decibel difference threshold, the preset decibel threshold can be adjusted according to actual conditions in consideration of the collection environment for collecting the abnormal noise and the interference noise during collection, and after the noise decibel difference is compared with the preset decibel threshold, whether the abnormal noise source is related to the piston pin connecting rod mechanism of the gasoline engine to be detected can be determined according to the size relationship between the noise decibel difference and the preset decibel threshold.
Further, the step S33 specifically includes the following steps:
when the noise decibel difference value is smaller than a preset decibel threshold value, judging that the source of abnormal sound is irrelevant to a piston pin connecting rod mechanism of the gasoline engine to be detected;
and when the noise decibel difference value is not less than a preset decibel threshold value, judging that the source of abnormal sound is related to a piston pin connecting rod mechanism of the gasoline engine to be detected.
It can be understood that when the noise decibel difference value is smaller than a preset decibel threshold value, the difference between the target position of the gasoline engine to be detected before oil injection and the target position of the gasoline engine to be detected after oil injection is not large, and the abnormal sound source can be judged to be irrelevant to the piston pin connecting rod mechanism of the gasoline engine to be detected; and when the noise decibel difference value is not less than a preset decibel threshold value, the difference between the target position of the gasoline engine to be detected before oil injection and the target position of the gasoline engine to be detected after oil injection is larger, namely after oil injection, the abnormal sound is obviously reduced, and the source of the abnormal sound can be judged to be related to the piston pin connecting rod mechanism of the gasoline engine to be detected.
According to the scheme, the comparison result is obtained by comparing the current abnormal noise with the target abnormal noise; obtaining a noise decibel difference value of the target abnormal noise and the current abnormal noise from the comparison result; determining whether an abnormal sound source is related to a piston pin connecting rod mechanism of the gasoline engine to be detected or not according to the size relation between the noise decibel difference value and a preset decibel threshold value; the detection can be carried out in the whole vehicle carrying state of the engine, the engine does not need to be disassembled, a stand does not need to be arranged independently, and an NVH test does not need to be passed, so that the operation steps are simpler and more convenient, and the time for confirming the abnormal sound source can be greatly shortened; and can realize long-range oil spout during the idle operating mode, original oil spout system can, need not to set up oil spout system in addition.
Correspondingly, the invention further provides a detection device for the abnormal sound of the gasoline engine.
Referring to fig. 7, fig. 7 is a functional block diagram of a first embodiment of the detecting device for abnormal noise of a gasoline engine according to the present invention.
In a first embodiment of the device for detecting abnormal noise of a gasoline engine according to the present invention, the device for detecting abnormal noise of a gasoline engine includes:
the noise acquisition module 10 is used for acquiring target abnormal noise of the gasoline engine to be detected under the idling working condition carried by the whole vehicle.
And the boosting oil injection module 20 is used for injecting oil after the engine oil pressure of the gasoline engine to be detected is increased, and acquiring the current abnormal noise of the gasoline engine to be detected.
And the detection module 30 is used for comparing the current abnormal noise with the target abnormal noise and determining whether an abnormal noise source is related to a piston pin connecting rod mechanism of the gasoline engine to be detected according to a comparison result.
The steps implemented by the functional modules of the device for detecting abnormal sound of the gasoline engine can refer to the embodiments of the method for detecting abnormal sound of the gasoline engine, and are not described herein again.
In addition, an embodiment of the present invention further provides a storage medium, where the storage medium may be a computer-readable non-volatile storage medium, and certainly may also be other types of storage media, which is not limited in this embodiment; the storage medium stores a detection program of abnormal noise of the gasoline engine, and the detection program of the abnormal noise of the gasoline engine realizes the following operations when being executed by the processor:
acquiring target abnormal noise of a gasoline engine to be detected under an idling working condition carried by a whole vehicle;
injecting oil after the engine oil pressure of the gasoline engine to be detected is increased, and acquiring the current abnormal noise of the gasoline engine to be detected;
and comparing the current abnormal noise with the target abnormal noise, and determining whether an abnormal noise source is related to a piston pin connecting rod mechanism of the gasoline engine to be detected according to a comparison result.
Further, the detection program of the abnormal noise of the gasoline engine is executed by the processor to realize the following operations:
increasing the oil pressure of the gasoline engine to be detected, and opening a piston cooling nozzle to spray oil to a target position after the oil pressure is increased, wherein the target position is located at a piston pin connecting rod of the gasoline engine to be detected;
and acquiring the current abnormal noise of the gasoline engine to be detected.
Further, the detection program of the abnormal noise of the gasoline engine is executed by the processor to realize the following operations:
increasing the oil pressure of the gasoline engine to be detected according to a preset oil pressure increasing proportion;
after the oil pressure is increased, acquiring a current oil pressure value, and comparing the current oil pressure value with a preset oil pressure value;
and judging whether to open a piston cooling nozzle to spray oil at the target position according to the comparison magnitude relation between the current oil pressure value and the preset oil pressure value.
Further, the detection program of the abnormal noise of the gasoline engine is executed by the processor to realize the following operations:
setting a preset oil pressure increasing proportion through an engine management system;
and adjusting the duty ratio of the motor of the oil pump according to the preset oil pressure increasing proportion so as to increase the oil pressure of the gasoline engine to be detected.
Further, the detection program of the abnormal noise of the gasoline engine is executed by the processor to realize the following operations:
when the current oil pressure value is smaller than the preset oil pressure value, oil injection is carried out on the target position without opening a piston cooling nozzle;
and when the current oil pressure value is not less than the preset oil pressure value, modifying the idling condition through a preset engine management system command, and starting a piston cooling nozzle to inject oil to the target position.
Further, the detection program of the abnormal noise of the gasoline engine is executed by the processor to realize the following operations:
comparing the current abnormal noise with the target abnormal noise to obtain a comparison result;
obtaining a noise decibel difference value of the target abnormal noise and the current abnormal noise from the comparison result;
and determining whether the abnormal sound source is related to a piston pin connecting rod mechanism of the gasoline engine to be detected according to the size relation between the noise decibel difference value and a preset decibel threshold value.
Further, the detection program of the abnormal noise of the gasoline engine is executed by the processor to realize the following operations:
when the noise decibel difference value is smaller than a preset decibel threshold value, judging that the source of abnormal sound is irrelevant to a piston pin connecting rod mechanism of the gasoline engine to be detected;
and when the noise decibel difference value is not less than a preset decibel threshold value, judging that the source of abnormal sound is related to a piston pin connecting rod mechanism of the gasoline engine to be detected.
According to the scheme, the target abnormal noise of the gasoline engine to be detected under the idling working condition carried by the whole vehicle is obtained; injecting oil after the engine oil pressure of the gasoline engine to be detected is increased, and acquiring the current abnormal noise of the gasoline engine to be detected; comparing the current abnormal noise with the target abnormal noise, and determining whether an abnormal noise source is related to a piston pin connecting rod mechanism of the gasoline engine to be detected according to a comparison result; the detection can be carried out in the whole vehicle carrying state of the engine, the engine does not need to be disassembled, a stand does not need to be arranged independently, and an NVH test does not need to be passed, so that the operation steps are simpler and more convenient, and the time for confirming the abnormal sound source can be greatly shortened; and can realize long-range oil spout during the idle operating mode, original oil spout system can, need not to set up oil spout system in addition.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system 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 system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A method for detecting abnormal sound of a gasoline engine is characterized by comprising the following steps:
acquiring target abnormal noise of a gasoline engine to be detected under an idling working condition carried by a whole vehicle;
injecting oil after the engine oil pressure of the gasoline engine to be detected is increased, and acquiring the current abnormal noise of the gasoline engine to be detected;
and comparing the current abnormal noise with the target abnormal noise, and determining whether an abnormal noise source is related to a piston pin connecting rod mechanism of the gasoline engine to be detected according to a comparison result.
2. The method for detecting abnormal noise of a gasoline engine as claimed in claim 1, wherein the step of injecting oil after increasing the engine oil pressure of the gasoline engine to be detected to obtain the current abnormal noise of the gasoline engine to be detected comprises the steps of:
increasing the oil pressure of the gasoline engine to be detected, and opening a piston cooling nozzle to spray oil to a target position after the oil pressure is increased, wherein the target position is located at a piston pin connecting rod of the gasoline engine to be detected;
and acquiring the current abnormal noise of the gasoline engine to be detected.
3. The method for detecting abnormal noise of a gasoline engine as set forth in claim 2, wherein the increasing the oil pressure of the gasoline engine to be detected and opening the piston cooling nozzle to inject the oil at the target position after the oil pressure is increased comprises:
increasing the oil pressure of the gasoline engine to be detected according to a preset oil pressure increasing proportion;
after the oil pressure is increased, acquiring a current oil pressure value, and comparing the current oil pressure value with a preset oil pressure value;
and judging whether to open a piston cooling nozzle to spray oil at the target position according to the comparison magnitude relation between the current oil pressure value and the preset oil pressure value.
4. The method for detecting abnormal noise of a gasoline engine according to claim 3, wherein said increasing the oil pressure of the gasoline engine to be detected according to a preset oil pressure increase ratio comprises:
setting a preset oil pressure increasing proportion through an engine management system;
and adjusting the duty ratio of the motor of the oil pump according to the preset oil pressure increasing proportion so as to increase the oil pressure of the gasoline engine to be detected.
5. The method for detecting abnormal noise of a gasoline engine as set forth in claim 3, wherein said determining whether to open a piston cooling nozzle to inject fuel at a target position according to a magnitude relationship of the comparison between the current oil pressure value and the preset oil pressure value comprises:
when the current oil pressure value is smaller than the preset oil pressure value, oil injection is carried out on the target position without opening a piston cooling nozzle;
and when the current oil pressure value is not less than the preset oil pressure value, modifying the idling condition through a preset engine management system command, and starting a piston cooling nozzle to inject oil to the target position.
6. The method for detecting abnormal noise of a gasoline engine according to any one of claims 1 to 5, wherein the comparing the current abnormal noise with the target abnormal noise and determining whether an abnormal noise source is related to a piston pin connecting rod mechanism of the gasoline engine to be detected according to the comparison result comprises:
comparing the current abnormal noise with the target abnormal noise to obtain a comparison result;
obtaining a noise decibel difference value of the target abnormal noise and the current abnormal noise from the comparison result;
and determining whether the abnormal sound source is related to a piston pin connecting rod mechanism of the gasoline engine to be detected according to the size relation between the noise decibel difference value and a preset decibel threshold value.
7. The method for detecting abnormal noise of a gasoline engine as claimed in claim 6, wherein the determining whether the abnormal noise source is related to the piston pin connecting rod mechanism of the gasoline engine to be detected according to the magnitude relation between the noise decibel difference value and the preset decibel threshold value comprises:
when the noise decibel difference value is smaller than a preset decibel threshold value, judging that the source of abnormal sound is irrelevant to a piston pin connecting rod mechanism of the gasoline engine to be detected;
and when the noise decibel difference value is not less than a preset decibel threshold value, judging that the source of abnormal sound is related to a piston pin connecting rod mechanism of the gasoline engine to be detected.
8. A detection device for abnormal noise of a gasoline engine is characterized by comprising:
the noise acquisition module is used for acquiring target abnormal noise of the gasoline engine to be detected under the idling working condition carried by the whole vehicle;
the boosting oil injection module is used for injecting oil after the engine oil pressure of the gasoline engine to be detected is increased, and obtaining the current abnormal noise of the gasoline engine to be detected;
and the detection module is used for comparing the current abnormal sound noise with the target abnormal sound noise and determining whether an abnormal sound source is related to a piston pin connecting rod mechanism of the gasoline engine to be detected according to a comparison result.
9. A detection apparatus for abnormal noise of a gasoline engine, characterized by comprising: a memory, a processor and a detection program of a gasoline engine abnormal sound stored on the memory and operable on the processor, the detection program of the gasoline engine abnormal sound being configured to implement the steps of the detection method of the gasoline engine abnormal sound according to any one of claims 1 to 7.
10. A storage medium having stored thereon a detection program of abnormal gasoline engine sound, the detection program of abnormal gasoline engine sound implementing the steps of the detection method of abnormal gasoline engine sound according to any one of claims 1 to 7 when executed by a processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010906944.0A CN111982519B (en) | 2020-08-31 | 2020-08-31 | Method, device and equipment for detecting abnormal sound of gasoline engine and storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010906944.0A CN111982519B (en) | 2020-08-31 | 2020-08-31 | Method, device and equipment for detecting abnormal sound of gasoline engine and storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111982519A true CN111982519A (en) | 2020-11-24 |
| CN111982519B CN111982519B (en) | 2021-12-14 |
Family
ID=73448691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010906944.0A Active CN111982519B (en) | 2020-08-31 | 2020-08-31 | Method, device and equipment for detecting abnormal sound of gasoline engine and storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111982519B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115416871A (en) * | 2022-08-17 | 2022-12-02 | 成都飞机工业（集团）有限责任公司 | Method, device, equipment and medium for quickly disassembling engine thrust pin |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2693958Y (en) * | 2004-02-25 | 2005-04-20 | 李锐 | Novel liquid jet motorcycle engine |
| CN101782464A (en) * | 2010-03-03 | 2010-07-21 | 罗新宇 | Method and instrument thereof for acoustic diagnosis of automobile engine |
| CN103674227A (en) * | 2012-09-17 | 2014-03-26 | 重庆长安汽车股份有限公司 | Method for testing engine vibration noise under whole-automobile condition |
| CN104122094A (en) * | 2014-07-29 | 2014-10-29 | 南通理工学院 | Method and device for diagnosing abnormal sound fault of engine |
| DE202015005578U1 (en) * | 2015-08-06 | 2015-12-07 | Borgward Trademark Holdings Gmbh | Device for detecting unusual noise for a high-pressure fuel pump of a vehicle engine |
| CN205562167U (en) * | 2016-01-20 | 2016-09-07 | 浙江吉利罗佑发动机有限公司 | Engine abnormal sound detection device |
| CN108386248A (en) * | 2018-01-29 | 2018-08-10 | 广州汽车集团股份有限公司 | A kind of engine oil method for controlling pump and device |
| CN210071339U (en) * | 2019-06-24 | 2020-02-14 | 长沙飞斯特机械制造有限公司 | Tool for judging abnormal sound of crankshaft flywheel set of automobile engine |
-
2020
- 2020-08-31 CN CN202010906944.0A patent/CN111982519B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2693958Y (en) * | 2004-02-25 | 2005-04-20 | 李锐 | Novel liquid jet motorcycle engine |
| CN101782464A (en) * | 2010-03-03 | 2010-07-21 | 罗新宇 | Method and instrument thereof for acoustic diagnosis of automobile engine |
| CN103674227A (en) * | 2012-09-17 | 2014-03-26 | 重庆长安汽车股份有限公司 | Method for testing engine vibration noise under whole-automobile condition |
| CN104122094A (en) * | 2014-07-29 | 2014-10-29 | 南通理工学院 | Method and device for diagnosing abnormal sound fault of engine |
| DE202015005578U1 (en) * | 2015-08-06 | 2015-12-07 | Borgward Trademark Holdings Gmbh | Device for detecting unusual noise for a high-pressure fuel pump of a vehicle engine |
| CN205562167U (en) * | 2016-01-20 | 2016-09-07 | 浙江吉利罗佑发动机有限公司 | Engine abnormal sound detection device |
| CN108386248A (en) * | 2018-01-29 | 2018-08-10 | 广州汽车集团股份有限公司 | A kind of engine oil method for controlling pump and device |
| CN210071339U (en) * | 2019-06-24 | 2020-02-14 | 长沙飞斯特机械制造有限公司 | Tool for judging abnormal sound of crankshaft flywheel set of automobile engine |
Non-Patent Citations (1)
| Title |
|---|
| 李志敏 等: "一种全浮式汽油机活塞销异响的试验研究及产生机理分析", 《装备制造技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115416871A (en) * | 2022-08-17 | 2022-12-02 | 成都飞机工业（集团）有限责任公司 | Method, device, equipment and medium for quickly disassembling engine thrust pin |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111982519B (en) | 2021-12-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6208919B1 (en) | Vehicle data acquisition and analysis system | |
| CN109726100A (en) | Application performance test method, apparatus, equipment and computer readable storage medium | |
| CN111982519B (en) | Method, device and equipment for detecting abnormal sound of gasoline engine and storage medium | |
| CN110274767B (en) | System reliability judging method, device, equipment and storage medium | |
| CN109558320B (en) | System testing method, device, system, equipment and computer readable storage medium | |
| CN111258290A (en) | Automatic test method and system for vehicle control unit | |
| GB2569579A (en) | Method of determining rail pressure in a common rail fuel system | |
| CN112578200A (en) | Vehicle detection method, device and equipment | |
| CN110132604B (en) | Engine reliability testing method, device, equipment and storage medium | |
| US10184414B2 (en) | System and method for evaluating vehicle fuel injection system | |
| CN113866350A (en) | Method, device and equipment for measuring accumulated carbon quantity of vehicle and storage medium | |
| CN106644497B (en) | Method for detecting vehicle based on built-in sensor of smart phone | |
| CN103377124A (en) | Testing method and device | |
| CN114151257B (en) | Method, device and equipment for diagnosing fuel injection quantity of fuel injector and readable storage medium | |
| CN114962031B (en) | Method and system for detecting coking of pipeline of air inlet system of internal combustion engine and vehicle | |
| CN110865228B (en) | Starting state detection method and device | |
| CN109253009B (en) | Guided internal combustion engine fuel injector cleaning detection system and method | |
| CN114942141A (en) | Range extender rack joint debugging test method for controlling operation of range extender based on INCA | |
| CN209743079U (en) | Cleaning and detecting system for oil injector of guide type internal combustion engine | |
| CN103019927A (en) | Performance testing method and system | |
| CN111679986B (en) | Software testing method and device and electronic equipment | |
| CN114352418B (en) | Diesel engine starting noise optimization method and device, storage medium and equipment | |
| CN114936411A (en) | Nozzle tip coking risk analysis method and system, readable storage medium and vehicle | |
| CN102708046A (en) | Computer software debugging method | |
| CN117571327A (en) | Engine oil injection system noise identification method, device, equipment and storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |