CN115288821B - Valve clearance adjustment monitoring method and device, electronic equipment and storage medium - Google Patents
Valve clearance adjustment monitoring method and device, electronic equipment and storage medium Download PDFInfo
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- CN115288821B CN115288821B CN202210874498.9A CN202210874498A CN115288821B CN 115288821 B CN115288821 B CN 115288821B CN 202210874498 A CN202210874498 A CN 202210874498A CN 115288821 B CN115288821 B CN 115288821B
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/20—Adjusting or compensating clearance
- F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
Abstract
The application relates to the technical field of engines, in particular to a valve clearance adjustment monitoring method, a device, electronic equipment and a storage medium, which are used for detecting a valve clearance in real time when a target vehicle runs. The method comprises the following steps: acquiring the braking power of a target vehicle when each time of braking is started; determining a first detection result of a valve clearance corresponding to the braking power based on a braking power threshold model every time the braking power is obtained; the braking power threshold model is constructed according to the braking power corresponding to the standard valve clearance and the limit valve clearance of the target vehicle respectively; the limit valve lash is a threshold value of the valve lash determined without changing the engine performance of the target vehicle; and if the first detection result indicates that the corresponding valve clearance reaches the limit valve clearance, adjusting the valve clearance of the target vehicle. According to the application, the valve clearance condition is reflected by the braking power of the vehicle during braking, so that the performance of the engine is improved.
Description
Technical Field
The present application relates to the field of engine technologies, and in particular, to a valve clearance adjustment monitoring method, a device, an electronic apparatus, and a storage medium.
Background
With the progress of the technology level, the automobile industry is also continuously developing, and an engine is an integral part of an automobile and is an important object of attention. Wherein the valve of the generator is the part responsible for inputting fuel into the engine and discharging exhaust gas. When the engine is in a cold state and the valve is closed, a certain gap is reserved between the tail end of the valve rod and the transmission piece, and the gap is called a valve gap.
However, the valve clearance will change with the increase of the mileage during the long-time running of the engine, if the valve clearance is larger, the opening degree of the intake valve and the exhaust valve of the engine is reduced, the air inflow is reduced, the exhaust is insufficient, the engine power is affected, and the economical efficiency is deteriorated; when the valve clearance is small, the engine valve cannot be completely closed, exhaust gas in the cylinder flows back, and air in the cylinder leaks, so that the engine power and the braking performance are poor.
Therefore, it is important to timely detect the change of the valve clearance in the running process of the automobile and inform a user of timely adjusting the valve clearance. However, at present, the maintenance of the valve clearance mainly depends on the fact that a user goes to check at a fixed maintenance period and cannot detect and maintain the valve clearance in time, so that the driving experience and safety of the user are reduced.
In summary, the current technology cannot detect the valve clearance in real time, so that the driving experience and safety of a user are reduced, and the performance of the engine is reduced.
Disclosure of Invention
The application provides a valve clearance adjustment monitoring method, a device, electronic equipment and a storage medium, which are used for at least timely detecting a valve clearance and adjusting the valve clearance so as to improve the performance of an engine.
The valve clearance adjustment monitoring method provided by the embodiment of the application comprises the following steps:
acquiring the braking power of a target vehicle when each time of braking is started;
determining a first detection result of a valve clearance corresponding to brake power based on a brake power threshold model every time the brake power is obtained; the braking power threshold model is constructed according to the braking power corresponding to the standard valve clearance and the limiting valve clearance of the target vehicle; the limit valve lash is a threshold value of a valve lash determined without changing engine performance of the target vehicle;
and if the valve clearance corresponding to the first detection result representation reaches the limit valve clearance, adjusting and monitoring the valve clearance of the target vehicle.
In some alternative embodiments, the method further comprises: determining a second detection result based on a difference between the currently acquired braking power and the last acquired braking power every time the braking power is acquired;
and if the first detection result indicates that the corresponding valve clearance reaches the limit valve clearance, adjusting the valve clearance of the target vehicle, including:
and if the first detection result indicates that the corresponding valve clearance reaches the limit valve clearance, and the corresponding second detection result indicates that the variation trend of the braking power is gradually reduced, adjusting the valve clearance of the target vehicle.
In some alternative embodiments, the method further comprises:
and if the second detection result is determined to represent that the variation trend of the braking power is suddenly reduced, the first detection result and the second detection result determined this time are ignored.
In some alternative embodiments, the method further comprises:
and if the first detection result indicates that the corresponding valve clearance does not reach the limit valve clearance, adding the data of the braking power to a model database so as to update the braking power threshold model based on the model database.
In some alternative embodiments, the limit valve clearance includes an upper valve clearance limit and a lower valve clearance limit;
the determining, based on a braking power threshold model, a first detection result of a valve clearance corresponding to the braking power includes:
determining a magnitude relation between a valve clearance corresponding to the braking power and the valve clearance upper limit or the valve clearance lower limit based on the braking power threshold model;
and obtaining a corresponding first detection result according to the size relation.
In some optional embodiments, if it is determined that the first detection result indicates that the corresponding valve clearance reaches the limit valve clearance, adjusting and monitoring the valve clearance of the target vehicle includes:
and if the first detection result indicates that the corresponding valve clearance reaches the limit valve clearance, sending an adjusting signal to the target vehicle so as to control the adjustment of the valve clearance of the target vehicle through the adjusting signal.
The embodiment of the application provides a valve clearance adjustment monitoring device, which comprises:
an acquisition unit that acquires braking power at each brake on of the target vehicle;
The detection unit is used for determining a first detection result of a valve clearance corresponding to the braking power based on a braking power threshold model when the braking power is obtained once; the braking power threshold model is constructed according to the braking power corresponding to the standard valve clearance and the limiting valve clearance of the target vehicle; the limit valve lash is a threshold value of a valve lash determined without changing engine performance of the target vehicle;
and the adjusting unit is used for adjusting and monitoring the valve clearance of the target vehicle if the valve clearance corresponding to the first detection result representation reaches the limit valve clearance.
In some alternative embodiments, the detection unit is further configured to: determining a second detection result based on a difference between the currently acquired braking power and the last acquired braking power every time the braking power is acquired;
the adjusting unit is specifically used for:
and if the first detection result indicates that the corresponding valve clearance reaches the limit valve clearance, and the corresponding second detection result indicates that the variation trend of the braking power is gradually reduced, adjusting the valve clearance of the target vehicle.
In some alternative embodiments, the adjustment unit is further configured to:
and if the second detection result is determined to represent that the variation trend of the braking power is suddenly reduced, the first detection result and the second detection result determined this time are ignored.
In some alternative embodiments, the adjustment unit is further configured to:
and if the first detection result indicates that the corresponding valve clearance does not reach the limit valve clearance, adding the data of the braking power to a model database so as to update the braking power threshold model based on the model database.
In some alternative embodiments, the limit valve clearance includes an upper valve clearance limit and a lower valve clearance limit; the detection unit is specifically used for:
determining a magnitude relation between a valve clearance corresponding to the braking power and the valve clearance upper limit or the valve clearance lower limit based on the braking power threshold model;
and obtaining a corresponding first detection result according to the size relation.
In some alternative embodiments, the adjusting unit is specifically configured to:
and if the first detection result indicates that the corresponding valve clearance reaches the limit valve clearance, sending an adjusting signal to the target vehicle so as to control the adjustment of the valve clearance of the target vehicle through the adjusting signal.
The embodiment of the application provides electronic equipment, which comprises a processor and a memory, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor is caused to execute the steps of any valve clearance adjustment monitoring method.
An embodiment of the present application provides a computer-readable storage medium including a computer program for causing an electronic device to execute the steps of any one of the above-described valve lash adjustment monitoring methods when the computer program is run on the electronic device.
Embodiments of the present application provide a computer program product comprising a computer program stored in a computer readable storage medium; when the processor of the electronic device reads the computer program from the computer-readable storage medium, the processor executes the computer program so that the electronic device performs the steps of any one of the valve lash adjustment monitoring methods described above.
The application has the following beneficial effects:
the embodiment of the application provides a valve clearance adjustment method, a valve clearance adjustment device, electronic equipment and a storage medium. Because the maintenance of the valve clearance in the related art mainly depends on the self-going inspection of a user in a fixed maintenance period, and the maintenance of the valve clearance cannot be detected in time, the application builds a braking power threshold model based on the braking power corresponding to the standard valve clearance and the limit valve clearance, and can judge whether the current valve clearance is normal or not through the collected braking power when the vehicle starts braking each time, so that the condition that the valve clearance needs to be regulated can be found in time, the judgment is simple and convenient, the reliability is strong, and the engine performance can be improved; in addition, compared with the method relying on manual detection in the prior art, the automatic detection and judgment method is more accurate and timely, and a large amount of manpower is saved.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application. The objectives and other advantages of the application will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
fig. 1 is a schematic diagram of an application scenario of a valve clearance adjustment monitoring method according to an embodiment of the present application;
FIG. 2 is an overall flowchart of a valve clearance adjustment monitoring method according to an embodiment of the present application;
FIG. 3 is an initial data diagram of a brake power threshold model according to an embodiment of the present application;
FIG. 4 is a comparison chart of model data of braking power thresholds before and after updating according to an embodiment of the present application;
FIG. 5A is a flowchart of the overall process of the valve clearance adjustment monitoring method in a specific application scenario provided by the embodiment of the present application;
FIG. 5B is a flowchart illustrating an overall process of a valve clearance adjustment monitoring method in another specific application scenario provided by the present application;
fig. 6 is a schematic diagram of a composition structure of a valve clearance adjustment monitoring device according to an embodiment of the present application;
fig. 7 is a schematic diagram of a hardware composition structure of an electronic device according to an embodiment of the present application;
fig. 8 is a schematic diagram of a hardware composition structure of another electronic device according to an embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the technical solutions of the present application, but not all embodiments. All other embodiments, based on the embodiments described in the present document, which can be obtained by a person skilled in the art without any creative effort, are within the scope of protection of the technical solutions of the present application.
Some of the concepts involved in the embodiments of the present application are described below.
Braking power: the output power of the engine when the brake is turned on. The magnitude of the valve clearance affects the braking power, so the application reflects the magnitude of the valve clearance by detecting the magnitude of the braking power.
Valve clearance: when the engine is in a cold state and the valve is closed, a gap is formed between the tail end of the valve rod and the transmission piece. The present application mainly relates to two special valve clearances: standard valve lash and limit valve lash. The standard valve clearance is a valve clearance under normal conditions obtained according to a factory standard of the vehicle; the limit valve lash is a threshold value of the valve lash determined without changing the engine performance of the vehicle, and may include an upper valve lash limit and a lower valve lash limit.
Braking power threshold model: and a model constructed based on the braking power corresponding to the standard valve clearance and the limit valve clearance of the target vehicle is used for detecting whether the braking power of the target vehicle exceeds a braking power threshold range or not so as to further reflect the valve clearance.
First detection result: based on the brake power threshold model and the collected brake power, whether the valve clearance corresponding to the collected brake power reaches the upper valve clearance limit or the lower valve clearance limit is represented by detecting whether the brake power exceeds the brake power threshold range.
Second detection result: and representing the variation trend of the current braking power based on the difference between the current braking power and the last braking power, and removing abnormal signals caused by sudden change of the braking power.
The preferred embodiments of the present application will be described below with reference to the accompanying drawings of the specification, it being understood that the preferred embodiments described herein are for illustration and explanation only, and not for limitation of the present application, and embodiments of the present application and features of the embodiments may be combined with each other without conflict.
Fig. 1 is a schematic diagram of an application scenario according to an embodiment of the present application. The application scenario diagram includes a terminal device 110 and a server 120.
In the embodiment of the present application, the terminal device 110 includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a desktop computer, a vehicle-mounted terminal, and the like; the terminal device 110 may be provided with a related client, where the client may be software (such as maintenance software, etc.), or may be a web page, an applet, etc., and the server 120 may be a background server corresponding to the software or the web page, the applet, etc., or a server specifically used for performing valve clearance adjustment monitoring, and the application is not limited in detail. The server 120 may be an independent physical server, a server cluster or a distributed system formed by a plurality of physical servers, or may be a cloud server providing cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, a content delivery network (Content Delivery Network, CDN), basic cloud computing services such as big data and an artificial intelligence platform.
It should be noted that, the method for valve lash adjustment monitoring in the embodiments of the present application may be performed by an electronic device, as shown in fig. 1, which may be the terminal device 110 or the server 120, that is, the method may be performed by the terminal device 110 or the server 120 alone, or may be performed by both the terminal device 110 and the server 120 together.
Taking the server 120 as a separate example, for example, in the artificial intelligence scenario, the target vehicle is a transport vehicle, and the server 120 collects the braking power and collects the braking power to the braking power threshold model each time the transport vehicle starts braking during the cargo transportation process. The server 120 may then determine the first detection result and the second detection result simultaneously based on the brake power threshold model, or the server 120 may determine the first detection result preferentially, or may determine the second detection result preferentially, and the specific order is not limited herein. Taking the first detection result of priority determination as an example, the server 120 judges whether the braking power is within the braking power threshold value range based on the braking power threshold value model, if so, the current valve clearance is normal, the server 120 adds the braking power data to the model database, and updates the data of the braking power threshold value model; if not, the server 120 continues to determine the second detection result, and determines whether the current braking power is slowly changed compared with the braking power collected last time, if not, the server 120 eliminates such abnormal signals, ignores the first detection result and the second detection result, waits for the next braking of the transport vehicle to repeat the steps, if so, the server 120 sends a valve clearance adjustment monitoring signal to the terminal device 110, and reminds the transport vehicle driver to the maintenance department for valve clearance maintenance.
In an alternative embodiment, the terminal device 110 and the server 120 may communicate via a communication network.
In an alternative embodiment, the communication network is a wired network or a wireless network.
It should be noted that, the number of the terminal devices 110 and the servers 120 is not limited in practice, and is not particularly limited in the embodiment of the present application, which is shown in fig. 1 for illustration only.
In addition, the embodiment of the application can be applied to various scenes, including but not limited to cloud technology, artificial intelligence, intelligent traffic and other scenes.
The valve clearance adjustment monitoring method provided by the exemplary embodiment of the present application will be described below with reference to the accompanying drawings in conjunction with the above-described application scenario, and it should be noted that the above-described application scenario is merely shown for the convenience of understanding the spirit and principle of the present application, and the embodiment of the present application is not limited in any way in this respect.
Referring to fig. 2, a flowchart of an implementation of a valve clearance adjustment monitoring method according to an embodiment of the present application is shown, and the server 120 is used alone as an example, and the implementation of the method is as follows:
s201: and acquiring the braking power of the target vehicle every time the brake is started.
When the target vehicle starts braking each time during driving, the server 120 may obtain the corresponding braking power for subsequent determination of the target vehicle valve lash size.
S202: and determining a first detection result of the valve clearance corresponding to the braking power based on the braking power threshold model every time the braking power is acquired.
Specifically, each time the braking power is obtained, the server 120 analyzes the current braking power data through the braking power threshold model, and obtains a first detection result of the valve clearance corresponding to the braking power. As shown in fig. 3, initial data of some two target vehicle braking power threshold models are shown. The braking power threshold model is approximately parabolic, the braking power threshold model is different for different vehicle models, the braking power corresponding to the lower valve clearance limit is possibly smaller than the braking power corresponding to the upper valve clearance limit, the braking power corresponding to the lower valve clearance limit is possibly larger than the braking power corresponding to the upper valve clearance limit, and the braking power threshold model is sometimes not perfectly parabolic. The magnitude relation and specific data between the braking power corresponding to the lower valve clearance limit and the braking power corresponding to the upper valve clearance limit are determined in advance by engine testing, but too large or too small valve clearance can lead to the reduction of the braking power.
In the embodiment of the application, a braking power threshold model is constructed based on the braking power corresponding to the standard valve clearance and the limit valve clearance of the target vehicle respectively; and calibrating and taking the braking power at each braking rotation speed in the standard valve clearance as an initial value, calibrating and taking the braking power at each braking rotation speed in the limit valve clearance as a critical value, wherein the braking power corresponding to the normal valve clearance is in a calibrated braking power threshold range.
It should be noted that, in a practical situation, a determined target vehicle has a fixed wear rule of the valve clearance with the increase of mileage, and the changing direction of the valve clearance is fixed, that is, the valve clearance increases with the increase of mileage or decreases with the increase of mileage, specifically, the changing direction is determined by the endurance test of the target vehicle.
The server 120 compares the currently acquired braking power with a braking power critical value calibrated in a braking power threshold model, judges the magnitude relation between the valve clearance corresponding to the currently acquired braking power and the upper limit or the lower limit of the valve clearance, and obtains a first detection result based on the magnitude relation; specifically, the server 120 determines the direction of change of the valve clearance according to the durability test of the target vehicle, if the valve clearance gradually changes to the direction of the upper limit of the valve clearance along with the increase of the mileage, that is, if the valve clearance is larger and larger, the valve clearance corresponding to the currently acquired braking power should be on the right side of the standard valve clearance, and the server 120 obtains a first detection result according to the magnitude relation between the valve clearance corresponding to the currently acquired braking power and the upper limit of the valve clearance; if the valve clearance gradually changes towards the lower limit direction of the valve clearance along with the increase of the mileage, i.e. the valve clearance is smaller and smaller, the valve clearance corresponding to the currently acquired braking power is on the left side of the standard valve clearance, and the server 120 obtains a first detection result according to the magnitude relation between the valve clearance corresponding to the currently acquired braking power and the lower limit of the valve clearance; the first detection result can indicate whether the valve clearance corresponding to the braking power is normal, namely, whether the valve clearance is within the upper limit and the lower limit of the valve clearance.
The limit valve clearance is a critical value of the valve clearance determined under the condition of not changing the engine performance of the target vehicle, and comprises an upper valve clearance limit and a lower valve clearance limit; the standard valve clearance is a valve clearance in a normal condition obtained according to a factory standard of the vehicle.
By transport vehicle C 1 For example, assume that in transporter C 1 During a certain transportation, after the first time of starting the braking, the server 120 obtains the braking power P c1 The server 120 will currently collect the braking power P c1 With transport vehicle C 1 Braking power threshold model M of (2) 1 Medium nominal braking power threshold value P x1 Or P y1 And comparing to obtain a first detection result. Let it be assumed that the braking power P c1 At the critical value P x1 And P y1 Between, the braking power P is indicated c1 The corresponding current valve lash is in a range of an upper valve lash limit and a lower valve lash limit.
Similarly, in the transport vehicle C 1 After the second, third, fourth, and fifth times of braking are started, the server 120 performs the above-described process, and the detected braking power P c2 、P c3 、P c4 、P c5 The corresponding valve lash is within a range of an upper valve lash limit and a lower valve lash limit.
Transport vehicle C 1 After the sixth brake on, the server 120 obtains the braking power P c6 And the currently collected braking power P c6 With transport vehicle C 1 Braking power threshold model M of (2) 1 Medium nominal braking power threshold value P x1 Or P y1 Comparing to obtain a firstAnd (5) detecting a result. Let it be assumed that the braking power P c6 Has reached or even exceeded the critical value P x1 Or P y1 Indicating braking power P c6 The corresponding current valve lash is outside of the range of the upper valve lash limit and the lower valve lash limit.
For another example, assume bus B 2 During a certain driving process, after the first brake starting, the server 120 obtains the braking power P b1 The server 120 will currently collect the braking power P b1 With bus B 2 Braking power threshold model M of (2) 2 Medium nominal braking power threshold value P x2 Or P y2 And comparing to obtain a first detection result. Let it be assumed that the braking power P b1 At the critical value P x2 And P y2 Between, the braking power P is indicated b1 The corresponding current valve lash is in a range of an upper valve lash limit and a lower valve lash limit.
Similarly, in bus B 2 After the second, third, fourth, fifth, and sixth brake starts, the server 120 performs the above procedure, assuming the detected braking power P b2 、P b3 、P b4 、P b5 、P b6 The corresponding valve lash is within a range of an upper valve lash limit and a lower valve lash limit.
Bus B 2 After the seventh brake on, the server 120 obtains the braking power P b7 And the currently collected braking power P b7 With bus B 2 Braking power threshold model M of (2) 2 Medium nominal braking power threshold value P x2 Or P y2 And comparing to obtain a first detection result. Let it be assumed that the braking power P b7 Has reached or even exceeded the critical value P x2 Or P y2 Indicating braking power P b7 The corresponding current valve lash is outside of the range of the upper valve lash limit and the lower valve lash limit.
After obtaining the first detection result, to further determine whether the valve lash of the target vehicle needs to be adjusted, the server 120 may perform the following steps based on the first detection result:
s203: and if the first detection result indicates that the corresponding valve clearance reaches the limit valve clearance, adjusting the valve clearance of the target vehicle.
For example bus B in step S202 2 Seventh braking, the braking power P detected by the server 120 b7 If the corresponding current valve clearance is outside the range of the upper valve clearance limit and the lower valve clearance limit, the server 120 sends an adjustment signal to the target vehicle, so as to remind the driver to the maintenance department to adjust the valve clearance of the target vehicle through the adjustment signal.
In addition, considering that the change of the normal valve clearance is a slow accumulation process, the change of the braking power along with the increase of the mileage is also a slow change, and the abnormal braking power drop occurs in the driving process of the target vehicle, at this time, the abrupt change of the braking power is not caused by the change of the valve clearance, and such abnormal situation needs to be eliminated. Therefore, in the embodiment of the application, before the valve clearance of the target vehicle is adjusted, the second detection result of the braking power, that is, whether the variation trend of the braking power exceeds the preset variation trend threshold value, can be determined based on the difference value between the braking power collected this time and the braking power collected last time.
That is, each time the braking power is obtained, a second detection result, that is, whether the variation trend of the braking power exceeds a preset variation trend threshold value can be determined based on the difference value between the currently obtained braking power and the last obtained braking power; and if the determined first detection result indicates that the corresponding valve clearance reaches the limit valve clearance and the corresponding second detection result indicates that the variation trend of the braking power is gradually reduced, the valve clearance of the target vehicle is adjusted.
Specifically, the discrete data of all the collected braking power can be determined as a discrete function based on the collection time, the discrete data of the braking power is fitted by using a least square method and the like, at this time, the change trend threshold can be set as a critical value of the slope, and the change trend of the currently collected braking power is determined according to whether the slope of the moment of currently collecting the braking power on the fitted curve exceeds a preset change trend threshold.
If the current corresponding gradient of the braking power is not greater than the preset change trend threshold, that is, the second detection result indicates that the change trend of the braking power is gradually reduced and belongs to slow change, and the first detection result obtained by the server 120 indicates that the corresponding valve clearance reaches or even exceeds the limit valve clearance, it indicates that the valve clearance of the target vehicle does exceed the limit valve clearance, and maintenance and adjustment are needed. At this time, the server 120 sends an adjustment signal to the target vehicle to prompt the driver to perform valve clearance adjustment of the target vehicle to the maintenance department through the adjustment signal.
If the corresponding slope of the current braking power exceeds the preset change trend threshold, the change trend of the braking power is characterized as suddenly falling and belongs to abnormal data, and the server 120 ignores the first detection result and the second detection result determined this time and continues to wait for the next braking to be started.
It should be noted that, with respect to the method for determining the trend of the braking power, the present application provides a possible embodiment, and is not limited specifically.
Still by the carrier C 1 For example, based on transport vehicle C 1 Constructed braking power threshold model M 1 With the braking power P collected by the sixth braking c6 Obtain the braking power P c6 First detection result of corresponding valve clearance based on braking power P c6 The braking power P collected from the fifth braking c5 Determining a second detection result if the first detection result represents the braking power P c6 The corresponding valve clearance exceeds the limit valve clearance, and the second detection result represents the braking power P c The change trend of (a) is gradually declining, and the server 120 moves to the carrier C 1 An adjustment signal is sent. If the second detection result represents the braking power P c If the variation trend of (a) is sudden drop, the server 120 directly ignores the first detection result and the second detection result determined this time and continues to wait for the carrier C no matter whether the first detection result indicates that the valve clearance reaches or even exceeds the limit valve clearance or that the valve clearance is within the limit valve clearance range 1 The next braking.
In addition, if the first detection result indicates that the corresponding valve clearance does not reach the limit valve clearance, and the second detection result indicates that the variation trend of the braking power is gradually reduced, the server 120 adds the data of the braking power to a model database, and the model database can expand the data of the braking power threshold model, update the braking power threshold model, and enable the model to be more accurate and perfect. For example, FIG. 4 is a graph showing a comparison of pre-update and post-update brake power threshold model data.
For example, in step S202, based on transporter C 1 Constructed braking power threshold model M 1 With the braking power P collected by the second braking c2 Obtain the braking power P c2 A first detection result of the corresponding valve clearance, and the first detection result represents the braking power P c2 The corresponding valve clearance does not reach the limit valve clearance, and the braking power P collected at this time is based on the brake power P c2 With the last acquired braking power P c1 The difference between the two is used for determining a second detection result, and the second detection result represents the braking power P c The change trend of (1) is gradually declining, the server 120 will store the data P c2 Added to a model database for updating a braking power threshold model M 1 。
Based on the above procedure, it is assumed that an existing one target vehicle C 3 As shown in fig. 5A, the detection of the target vehicle C is based on this scene 3 An overall flow chart of whether the valve lash requires adjustment.
Step 501A: and acquiring the braking power when the brake is started.
Step 502A: based on the target vehicle C 3 And determining a first detection result of a valve clearance corresponding to the braking power.
Step 503A: and determining a second detection result based on the difference between the brake power acquired at this time and the brake power acquired last time.
Step 504A: determining whether a valve clearance corresponding to the braking power reaches a limit valve clearance or not based on a first detection result; based on the second detection result, it is determined whether the variation trend of the braking power is stepwise or abrupt. If the second detection result is a sudden drop, executing step 505A; if the first detection result is that the valve clearance is not reached and the second detection result is that the valve clearance is gradually decreased, step 506A is executed; if the first detection result is that the valve clearance is reached and the second detection result is that the valve clearance is gradually decreased, step 507A is executed.
Step 505A: and ignoring the first detection result and the second detection result acquired at the time.
Step 506A: the data for this braking power is added to the model database.
Step 507A: to the target vehicle C 3 A valve lash adjustment signal is sent.
Step 508A: waiting for the next brake to be turned on.
The above steps are performed in order to prioritize the first detection result, and may be performed in order to prioritize the second detection result, as shown in fig. 5B, for another detection target vehicle C 3 An overall flow chart of whether the valve lash requires adjustment.
Step 501B: and acquiring the braking power when the brake is started.
Step 502B: and determining a second detection result based on the difference between the brake power acquired at this time and the brake power acquired last time.
Step 503B: based on the second detection result, it is determined whether the variation trend of the braking power is stepwise or abrupt. If the step-down is performed, step 504B is performed, and if the step-down is performed, step 505B is performed.
Step 504B: based on the target vehicle C 3 And determining a first detection result of a valve clearance corresponding to the braking power.
Step 505B: and ignoring the first detection result and the second detection result acquired at the time.
Step 506B: and determining whether the valve clearance corresponding to the braking power reaches the limit valve clearance or not based on the first detection result, if so, executing step 507B, otherwise, executing step 508B.
Step 507B: to the target vehicle C 3 A valve lash adjustment signal is sent.
Step 508B: the data for this braking power is added to the model database.
Step 509B: waiting for the next brake to be turned on.
Based on the same inventive concept, the embodiment of the application also provides a valve clearance adjustment monitoring device. As shown in fig. 6, which is a schematic structural diagram of the valve clearance adjustment monitoring apparatus 600, may include:
an acquisition unit 601 that acquires braking power at each time when a brake of a target vehicle is turned on;
the detection unit 602 determines a first detection result of a valve clearance corresponding to the braking power based on a braking power threshold model every time the braking power is acquired; the braking power threshold model is constructed according to the braking power corresponding to the standard valve clearance and the limit valve clearance of the target vehicle respectively; the limit valve lash is a threshold value of the valve lash determined without changing the engine performance of the target vehicle;
and the adjusting unit 603 is used for adjusting and monitoring the valve clearance of the target vehicle if the first detection result indicates that the corresponding valve clearance reaches the limit valve clearance.
In some alternative embodiments, the detection unit 602 is further configured to: determining a second detection result based on a difference between the currently acquired braking power and the last acquired braking power every time the braking power is acquired;
The adjusting unit 603 is specifically configured to:
and if the first detection result indicates that the corresponding valve clearance reaches the limit valve clearance and the corresponding second detection result indicates that the variation trend of the braking power is gradually reduced, adjusting the valve clearance of the target vehicle.
In some alternative embodiments, the adjusting unit 603 is further configured to:
if the second detection result is determined to represent the sudden drop of the variation trend of the braking power, the first detection result and the second detection result determined at this time are ignored.
In some alternative embodiments, the adjusting unit 603 is further configured to:
and if the first detection result indicates that the corresponding valve clearance does not reach the limit valve clearance, adding the data of the braking power to a model database so as to update a braking power threshold model based on the model database.
In some alternative embodiments, the limit valve clearance includes an upper valve clearance limit and a lower valve clearance limit, and the detection unit 602 is specifically configured to:
determining the magnitude relation between a valve clearance corresponding to the braking power and an upper valve clearance limit or a lower valve clearance limit based on a braking power threshold model;
and obtaining a corresponding first detection result according to the size relation.
In some alternative embodiments, the adjusting unit 603 is specifically configured to:
And if the first detection result is determined to indicate that the corresponding valve clearance reaches the limit valve clearance, sending an adjusting signal to the target vehicle so as to control the adjustment of the valve clearance of the target vehicle through the adjusting signal.
The embodiment of the application also provides electronic equipment based on the same conception as the embodiment of the method. In one embodiment, the electronic device may be a server, such as server 120 shown in FIG. 1. In this embodiment, the electronic device may be configured as shown in fig. 7, including a memory 701, a communication module 703, and one or more processors 702.
Memory 701 for storing a computer program for execution by processor 702. The memory 701 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, a program required for running an instant communication function, and the like; the storage data area can store various instant messaging information, operation instruction sets and the like.
The memory 701 may be a volatile memory (RAM), such as a random-access memory (RAM); the memory 701 may also be a nonvolatile memory (non-volatile memory), such as a read-only memory (rom), a flash memory (flash memory), a hard disk (HDD) or a Solid State Drive (SSD); or memory 701 is any other medium that can be used to carry or store a desired computer program in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such. Memory 701 may be a combination of the above.
The processor 702 may include one or more central processing units (central processing unit, CPU) or digital processing units, or the like. A processor 702 for implementing the above-described valve lash adjustment monitoring method when calling a computer program stored in the memory 701.
The communication module 703 is used for communicating with a terminal device and other servers.
The specific connection medium between the memory 701, the communication module 703 and the processor 702 is not limited in the embodiment of the present application. The embodiment of the present application is shown in fig. 7, where the memory 701 and the processor 702 are connected by a bus 704, where the bus 704 is shown in bold in fig. 7, and the connection between other components is merely illustrative, and not limiting. The bus 704 may be divided into an address bus, a data bus, a control bus, and the like. For ease of description, only one thick line is depicted in fig. 7, but only one bus or one type of bus is not depicted.
The memory 701 stores a computer storage medium in which computer executable instructions for implementing the valve lash adjustment monitoring method of the embodiment of the present application are stored. The processor 702 is configured to perform the valve lash adjustment monitoring method described above, as shown in fig. 2.
In another embodiment, the electronic device may also be other electronic devices, such as terminal device 110 shown in fig. 1. In this embodiment, the structure of the electronic device may include, as shown in fig. 8: communication component 810, memory 820, display unit 830, camera 840, sensor 850, audio circuit 860, bluetooth module 870, processor 880, and the like.
The communication component 810 is for communicating with a server. In some embodiments, a circuit wireless fidelity (Wireless Fidelity, wiFi) module may be included, where the WiFi module belongs to a short-range wireless transmission technology, and the electronic device may help the user to send and receive information through the WiFi module.
Memory 820 may be used to store software programs and data. The processor 880 performs various functions of the terminal device 110 and data processing by executing software programs or data stored in the memory 820. Memory 820 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage device. Memory 820 stores an operating system that enables terminal device 110 to operate. The memory 820 may store an operating system and various application programs, and may also store a computer program for executing the valve lash adjustment monitoring method of the embodiment of the present application.
The display unit 830 may also be used to display information input by a user or information provided to the user and a graphical user interface (graphical user interface, GUI) of various menus of the terminal device 110. In particular, the display unit 830 may include a display 832 disposed on a front surface of the terminal device 110. The display 832 may be configured in the form of a liquid crystal display, light emitting diodes, or the like.
The display unit 830 may also be used to receive input numeric or character information, generate signal inputs related to user settings and function controls of the terminal device 110, and in particular, the display unit 830 may include a touch screen 831 disposed on the front surface of the terminal device 110, and may collect touch operations on or near the user, such as clicking buttons, dragging scroll boxes, and the like.
The touch screen 831 may cover the display screen 832, or the touch screen 831 may be integrated with the display screen 832 to implement input and output functions of the terminal device 110, and after integration, the touch screen may be abbreviated as touch screen. The display unit 830 may display an application program and a corresponding operation procedure in the present application.
The camera 840 may be used to capture still images and a user may post images captured by the camera 840 through an application. The camera 840 may be one or more. The object generates an optical image through the lens and projects the optical image onto the photosensitive element. The photosensitive element may be a charge coupled device (charge coupled device, CCD) or a Complementary Metal Oxide Semiconductor (CMOS) phototransistor. The photosensitive elements convert the optical signals to electrical signals, which are then transferred to a processor 880 for conversion to digital image signals.
The terminal device 110 may further include at least one sensor 850, such as an acceleration sensor 851, a distance sensor 852, a fingerprint sensor 853, a temperature sensor 854. The terminal device 110 may also be configured with other sensors such as gyroscopes, barometers, hygrometers, thermometers, infrared sensors, light sensors, motion sensors, and the like.
Audio circuitry 860, speaker 861, microphone 862 may provide an audio interface between a user and terminal device 110. The audio circuit 860 may transmit the received electrical signal converted from audio data to the speaker 861, and the electrical signal is converted into a sound signal by the speaker 861 and output. The terminal device 110 may also be configured with a volume button for adjusting the volume of the sound signal. On the other hand, microphone 862 converts the collected sound signals into electrical signals, which are received by audio circuit 860 and converted into audio data, which are output to communication component 810 for transmission to, for example, another terminal device 110, or to memory 820 for further processing.
The bluetooth module 870 is used for exchanging information with other bluetooth devices having a bluetooth module through a bluetooth protocol. For example, the terminal device 110 may establish a bluetooth connection with a wearable electronic device (e.g., a smart watch) that also has a bluetooth module through the bluetooth module 870, so as to perform data interaction.
The processor 880 is a control center of the terminal device 110, connects various parts of the entire terminal using various interfaces and lines, and performs various functions of the terminal device 110 and processes data by running or executing software programs stored in the memory 820, and calling data stored in the memory 820. In some embodiments, processor 880 may include one or more processing units; the processor 880 may also integrate an application processor that primarily handles operating systems, user interfaces, applications, etc., and a baseband processor that primarily handles wireless communications. It will be appreciated that the baseband processor described above may not be integrated into the processor 880. The processor 880 of the present application may run an operating system, an application, a user interface display and a touch response, and a valve lash adjustment monitoring method according to an embodiment of the present application. In addition, the processor 880 is coupled to the display unit 830.
In some possible embodiments, aspects of the valve lash adjustment monitoring method provided by the present application may also be implemented in the form of a program product comprising a computer program for causing an electronic device to perform the steps of the valve lash adjustment monitoring method according to the various exemplary embodiments of the present application described herein above, when the program product is run on an electronic device, e.g. the electronic device may perform the steps as shown in fig. 2.
The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium can be, for example, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium would include the following: an electrical connection having one or more wires, a portable disk, a hard disk, random Access Memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application 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 application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations 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.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (9)
1. A valve lash adjustment monitoring method, characterized in that the method comprises:
acquiring the braking power of a target vehicle when each time of braking is started;
determining a first detection result of a valve clearance corresponding to brake power based on a brake power threshold model every time the brake power is obtained; the braking power threshold model is constructed according to the braking power corresponding to the standard valve clearance and the limiting valve clearance of the target vehicle; the limit valve lash is a threshold value of a valve lash determined without changing engine performance of the target vehicle;
And if the valve clearance corresponding to the first detection result representation reaches the limit valve clearance, adjusting and monitoring the valve clearance of the target vehicle.
2. The method of claim 1, wherein the method further comprises: determining a second detection result based on a difference between the currently acquired braking power and the last acquired braking power every time the braking power is acquired;
and if the first detection result indicates that the corresponding valve clearance reaches the limit valve clearance, adjusting the valve clearance of the target vehicle, including:
and if the first detection result indicates that the corresponding valve clearance reaches the limit valve clearance, and the corresponding second detection result indicates that the variation trend of the braking power is gradually reduced, adjusting the valve clearance of the target vehicle.
3. The method of claim 2, wherein the method further comprises:
and if the second detection result is determined to represent that the variation trend of the braking power is suddenly reduced, the first detection result and the second detection result determined this time are ignored.
4. The method of claim 1, wherein the method further comprises:
and if the first detection result indicates that the corresponding valve clearance does not reach the limit valve clearance, adding the data of the braking power to a model database so as to update the braking power threshold model based on the model database.
5. The method of claim 1, wherein the limit valve clearance comprises an upper valve clearance limit and a lower valve clearance limit;
the determining, based on a braking power threshold model, a first detection result of a valve clearance corresponding to the braking power includes:
determining a magnitude relation between a valve clearance corresponding to the braking power and the valve clearance upper limit or the valve clearance lower limit based on the braking power threshold model;
and obtaining a corresponding first detection result according to the size relation.
6. The method according to any one of claims 1 to 5, wherein if it is determined that the first detection result indicates that the corresponding valve clearance reaches the limit valve clearance, performing adjustment monitoring on the valve clearance of the target vehicle includes:
and if the first detection result indicates that the corresponding valve clearance reaches the limit valve clearance, sending an adjusting signal to the target vehicle so as to control the adjustment of the valve clearance of the target vehicle through the adjusting signal.
7. A valve lash adjustment monitoring device, characterized by comprising:
an acquisition unit for acquiring a braking power of the target vehicle every time the brake is turned on;
the detection unit is used for determining a first detection result of a valve clearance corresponding to the braking power based on a braking power threshold model every time the braking power is acquired; the braking power threshold model is constructed according to the braking power corresponding to the standard valve clearance and the limiting valve clearance of the target vehicle; the limit valve lash is a threshold value of a valve lash determined without changing engine performance of the target vehicle;
and the adjusting unit is used for adjusting and monitoring the valve clearance of the target vehicle if the valve clearance corresponding to the first detection result representation reaches the limit valve clearance.
8. An electronic device comprising a processor and a memory, wherein the memory stores a computer program which, when executed by the processor, causes the processor to perform the steps of the method of any of claims 1 to 6.
9. A computer readable storage medium comprising a computer program for causing an electronic device to perform the steps of the method of any one of claims 1-6 when said computer program is run on the electronic device.
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| CN202210874498.9A CN115288821B (en) | 2022-07-25 | 2022-07-25 | Valve clearance adjustment monitoring method and device, electronic equipment and storage medium |
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