CN114320596A - Diesel engine parallel operation monitoring method and device, electronic equipment and medium - Google Patents
Diesel engine parallel operation monitoring method and device, electronic equipment and medium Download PDFInfo
- Publication number
- CN114320596A CN114320596A CN202111476028.9A CN202111476028A CN114320596A CN 114320596 A CN114320596 A CN 114320596A CN 202111476028 A CN202111476028 A CN 202111476028A CN 114320596 A CN114320596 A CN 114320596A
- Authority
- CN
- China
- Prior art keywords
- parallel operation
- oil consumption
- diesel engines
- fuel
- determining
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Landscapes
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The application provides a diesel engine parallel operation monitoring method, a diesel engine parallel operation monitoring device, electronic equipment and a medium, wherein the method comprises the following steps: determining a plurality of single-machine oil consumption rates corresponding to a plurality of diesel engines according to the single-machine power of the diesel engines connected in parallel and the branch pipeline pressure of each fuel pipeline branch corresponding to the diesel engines; determining a first relative range according to the oil consumption rates of the plurality of single machines; the first relative range characterizes a discrete degree of the single-engine fuel consumption rates of the plurality of diesel engines; if the first relative range is monitored to exceed a preset first threshold value, determining that the parallel operation consistency of the parallel operation unit is abnormal; the first threshold value represents the allowable fluctuation range of the single-engine oil consumption rates of the plurality of diesel engines during merging; the parallel operation unit comprises the diesel engines connected with the parallel operation. The method can be used for early warning the traveling block of the parallel operation unit in a test or use process, and the occurrence of the traveling block of the parallel operation unit is reduced.
Description
Technical Field
The application relates to the technical field of automotive electronics, in particular to a diesel engine parallel operation monitoring method and device, electronic equipment and a medium.
Background
Along with the application operating mode of diesel engine is more complicated, often use many diesel engines and the work of driving in parallel, it is not enough to take place high-power pipeline fuel feeding easily, leads to and drives when power exceeds a definite value, seriously influences unit normal use.
For middle and low-end diesel engines, especially mechanical pump diesel engines, monitoring means for diesel engine parallel operation is often lacked, traveling is easily caused, and fault reasons are not easy to check.
Disclosure of Invention
The embodiment of the application provides a diesel engine parallel operation monitoring method and device, electronic equipment and a medium, which can determine the discrete degree of single-machine oil consumption rate based on the branch pipeline pressure at the branch of a fuel pipeline and the single-machine power of a parallel operation unit, monitor whether the parallel operation consistency of the parallel operation unit is abnormal or not, and reduce the occurrence of the parallel operation unit.
In a first aspect, an embodiment of the present application provides a diesel engine parallel operation monitoring method, where the method includes:
determining a plurality of single-machine oil consumption rates corresponding to a plurality of diesel engines according to the single-machine power of the diesel engines connected in parallel and the branch pipeline pressure of each fuel pipeline branch corresponding to the diesel engines;
determining a first relative range according to the oil consumption rates of the plurality of single machines; the first relative range characterizes a discrete degree of the single-engine fuel consumption rates of the plurality of diesel engines;
if the first relative range is monitored to exceed a preset first threshold value, determining that the parallel operation consistency of the parallel operation unit is abnormal; the first threshold value represents the allowable fluctuation range of the single-engine oil consumption rates of the plurality of diesel engines during merging; the parallel operation unit comprises the diesel engines connected with the parallel operation.
According to the method, the oil consumption rates of the plurality of single engines corresponding to the plurality of diesel engines are determined according to the single engine power of the plurality of diesel engines connected in parallel and the branch pipeline pressure of each fuel pipeline branch corresponding to the plurality of diesel engines; determining a first relative range according to the oil consumption rates of a plurality of single units; the first relative range represents the discrete degree of the single-machine oil consumption rates of the plurality of diesel engines; if the first relative range is monitored to exceed a preset first threshold value, determining that the parallel operation consistency of the parallel operation unit is abnormal; the first threshold value represents the allowable fluctuation range of the single-engine oil consumption rates of a plurality of diesel engines during parallel operation; the parallel operation unit comprises a plurality of diesel engines connected in parallel operation. The method can determine the discrete degree of the single-machine oil consumption rate based on the pressure of the branch pipeline at the branch of the fuel pipeline and the single-machine power of the parallel operation unit, monitor whether the parallel operation consistency of the parallel operation unit is abnormal or not, can perform early warning on the traveling vehicles of the parallel operation unit in a test or use process, and reduce the occurrence of the traveling vehicles of the parallel operation unit.
In one possible implementation manner, determining a plurality of single-unit fuel consumption rates corresponding to a plurality of diesel engines according to single-unit powers of the plurality of diesel engines connected in parallel and branch line pressures of fuel line branches corresponding to the plurality of diesel engines includes:
determining the fuel flow of each fuel pipeline branch according to the branch pipeline pressure of each fuel pipeline branch corresponding to a plurality of diesel engines connected with a parallel vehicle;
and determining the single-machine oil consumption rate of each diesel engine according to the fuel flow of each fuel pipeline branch and the single-machine power of each diesel engine.
According to the method, the pressure sensors are installed at the branches of the fuel pipelines, the branch pipeline pressure of each fuel pipeline branch corresponding to a plurality of diesel engines connected in parallel is obtained, the fuel pipeline branches indirectly measure the oil quantity of different branches by using the flowing pressure of liquid, the processing is carried out based on the oil quantity signals, and the single-machine oil consumption rate is determined. The method can determine the oil supply quantity of different fuel oil pipeline branches, further determine the single machine power of each diesel engine of the parallel operation unit, reduce the calculation quantity for determining the single machine power and improve the parallel operation monitoring efficiency of the diesel engines.
In a possible implementation manner, the determining a first relative range according to the plurality of single-machine fuel consumption rates includes:
determining the maximum single-machine oil consumption rate, the minimum single-machine oil consumption rate and the average single-machine oil consumption rate corresponding to the plurality of diesel engines according to the plurality of single-machine oil consumption rates; the average single machine oil consumption rate is the average value of the oil consumption rates of the single machines;
and determining the relative range of the oil consumption rates of the plurality of single units according to the maximum single-unit oil consumption rate, the minimum single-unit oil consumption rate and the average single-unit oil consumption rate to obtain the first relative range.
According to the method, the maximum single-machine oil consumption rate, the minimum single-machine oil consumption rate and the average single-machine oil consumption rate corresponding to a plurality of diesel engines are determined; the average single-machine oil consumption rate is the average value of the oil consumption rates of the single machines; and determining the relative range of the oil consumption rates of the plurality of single machines according to the maximum single machine oil consumption rate, the minimum single machine oil consumption rate and the average single machine oil consumption rate to obtain a first relative range. The method determines the relative range of the plurality of single-machine oil consumption rates based on the maximum single-machine oil consumption rate, the minimum single-machine oil consumption rate and the average single-machine oil consumption rate corresponding to the plurality of diesel engines, can more accurately reflect the discrete degree of the single-machine oil consumption rates of the plurality of diesel engines, enhances the accuracy of monitoring the diesel engines in parallel operation, and reduces the occurrence of the parallel operation unit.
In a possible implementation manner, after determining that the merge consistency of the merge unit is abnormal, the method further includes:
sending a first alarm instruction; the first alarm instruction is used for sending out parallel operation abnormity prompt information.
In the method, after the abnormal parallel operation consistency of the parallel operation unit is determined, a first alarm instruction is sent out; the first alarm instruction is used for sending out parallel operation abnormity prompt information. The method comprises the steps that after the fact that the parallel operation consistency of the parallel operation unit is abnormal is determined, a first alarm instruction is sent out; the first alarm instruction is used for sending out the abnormal prompt information of the parallel operation, so that the early warning efficiency of the parallel operation unit during testing or using can be improved, and the number of the parallel operation unit can be reduced.
In one possible implementation, the method further includes:
if the power of the whole parallel operation unit is higher than a preset second threshold value, sending a second alarm instruction; the second threshold value is the calibrated maximum parallel operation power supported by the fuel oil pipelines of the parallel operation unit; and the second alarm instruction is used for sending out prompt information of the risk of the touring car.
According to the method, if the power of the whole parallel operation unit is higher than a preset second threshold value, a second alarm instruction is sent out; the second threshold value is the maximum parallel operation power supported by the fuel oil pipelines of the calibrated parallel operation unit; the second alarm instruction is used for sending out prompt information of the risk of the touring bus. The method can continuously monitor the complete machine power of the parallel operation unit, and realizes early warning on the traveling vehicles of the parallel operation unit by combining the calibrated maximum parallel operation power supported by the fuel oil pipeline of the parallel operation unit, thereby further reducing the occurrence of the traveling vehicles of the parallel operation unit.
In one possible implementation, the method further includes:
determining a second relative range of the fuel flow and a third relative range of the single-machine power according to the fuel flow of each fuel pipeline branch and the single-machine power of each diesel engine;
if the second relative pole difference and the third relative pole difference are monitored not to exceed a preset third threshold value, and the parallel operation unit is in a car traveling state or is stopped, a third alarm instruction is sent out; the third alarm instruction is used for sending out abnormal prompt information that the pipeline from the branch pipeline to the diesel engine oil inlet is necked down or blocked; the third threshold value characterizes a fuel flow of the fuel line branch or a fluctuation range of the single-machine power allowed during merging.
According to the method, the second relative range of the fuel flow and the third relative range of the single-machine power are determined according to the fuel flow of each fuel pipeline branch and the single-machine power of each diesel engine; if the second relative polar difference and the third relative polar difference do not exceed a preset third threshold value and the parallel operation unit swims or stops, a third alarm instruction is sent; the third alarm instruction is used for sending out abnormal prompt information that the pipeline from the branch pipeline to the diesel engine oil inlet is necked or blocked; the third threshold value characterizes the permissible fuel flow or the fluctuation range of the individual power of the fuel line branch during merging. According to the method, when the flow rates of all branches are consistent, the power of all diesel engines is consistent, if traveling or stopping occurs, an alarm is given to prompt whether the fuel pipeline branches to the diesel engine oil inlet is reduced or blocked, traveling of a parallel operation unit can be reduced, the pipeline abnormity can be prompted, and the workload of troubleshooting of fault factors related to the traveling of the parallel operation unit is reduced.
In a second aspect, an embodiment of the present application provides a diesel engine parallel operation monitoring device, the device includes:
the operating parameter module is used for determining a plurality of single-machine oil consumption rates corresponding to the plurality of diesel engines according to the single-machine power of the plurality of diesel engines connected in parallel and the branch pipeline pressure of each fuel pipeline branch corresponding to the plurality of diesel engines;
the data analysis module is used for determining a first relative range according to the oil consumption rates of the plurality of single machines; the first relative range characterizes a discrete degree of the single-engine fuel consumption rates of the plurality of diesel engines;
the abnormality judgment module is used for determining that the parallel operation consistency of the parallel operation unit is abnormal if the first relative range exceeds a preset first threshold value; the first threshold value represents the allowable fluctuation range of the single-engine oil consumption rates of the plurality of diesel engines during merging; the parallel operation unit comprises the diesel engines connected with the parallel operation.
In one possible implementation, the apparatus further includes:
the power monitoring module is used for sending a second alarm instruction if the power of the whole parallel operation unit is higher than a preset second threshold value; the second threshold value is the calibrated maximum parallel operation power supported by the fuel oil pipelines of the parallel operation unit; and the second alarm instruction is used for sending out prompt information of the risk of the touring car.
In a possible implementation manner, the operation parameter module is specifically configured to:
determining the fuel flow of each fuel pipeline branch according to the branch pipeline pressure of each fuel pipeline branch corresponding to a plurality of diesel engines connected with a parallel vehicle;
and determining the single-machine oil consumption rate of each diesel engine according to the fuel flow of each fuel pipeline branch and the single-machine power of each diesel engine.
In a possible implementation manner, the data analysis module is specifically configured to:
determining the maximum single-machine oil consumption rate, the minimum single-machine oil consumption rate and the average single-machine oil consumption rate corresponding to the plurality of diesel engines according to the plurality of single-machine oil consumption rates; the average single machine oil consumption rate is the average value of the oil consumption rates of the single machines;
and determining the relative range of the oil consumption rates of the plurality of single units according to the maximum single-unit oil consumption rate, the minimum single-unit oil consumption rate and the average single-unit oil consumption rate to obtain the first relative range.
In a possible implementation manner, the abnormality determining module is further configured to:
sending a first alarm instruction; the first alarm instruction is used for sending out parallel operation abnormity prompt information.
In a possible implementation manner, the data analysis module is further configured to: determining a second relative range of the fuel flow and a third relative range of the single-machine power according to the fuel flow of each fuel pipeline branch and the single-machine power of each diesel engine;
the abnormality judgment module is further configured to: if the second relative pole difference and the third relative pole difference are monitored not to exceed a preset third threshold value, and the parallel operation unit is in a car traveling state or is stopped, a third alarm instruction is sent out; the third alarm instruction is used for sending out abnormal prompt information that the pipeline from the branch pipeline to the diesel engine oil inlet is necked down or blocked; the third threshold value characterizes a fuel flow of the fuel line branch or a fluctuation range of the single-machine power allowed during merging.
In a third aspect, an electronic device is provided, which includes a processor and a memory, where the memory stores program codes, and when the program codes are executed by the processor, the processor is caused to execute the steps of the diesel engine parallel monitoring method according to any one of the above.
In a fourth aspect, a computer-readable storage medium is provided, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the method for monitoring diesel engine parallel operation is implemented.
For technical effects brought by any one implementation manner of the second aspect to the fourth aspect, reference may be made to the technical effects brought by the implementation manner of the first aspect, and details are not described here.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic flow chart of a diesel engine parallel operation monitoring method according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a parallel operation unit according to an embodiment of the present application;
fig. 3 is a schematic flow chart of another diesel engine parallel operation monitoring method according to an embodiment of the present disclosure;
fig. 4 is a schematic flow chart of another diesel engine parallel operation monitoring method according to an embodiment of the present disclosure;
fig. 5 is a schematic flow chart of another diesel engine parallel operation monitoring method according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of another diesel engine parallel operation monitoring device provided in the embodiment of the present application;
fig. 7 is a schematic structural diagram of another diesel engine parallel operation monitoring device provided in the embodiment of the present application;
fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be described in further detail with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Some terms in the embodiments of the present application are explained below to facilitate understanding by those skilled in the art.
(1) An ECU: (Electronic Control Unit ): the ECU, also known as an "engine electronic control unit", is a controller that performs calculation, processing, and judgment according to signals input from various sensors, and then outputs commands to control the operation of an actuator.
(2) And (3) parallel operation: the parallel operation is that more than one engine drives the load together through the transmission of a reduction gear.
(3) Traveling: the traveling vehicle is a fault phenomenon generated by the change of the power of an engine and the fluctuation of the rotating speed of the engine when the opening of a throttle valve is stabilized or the vehicle travels in a cruising way. When the engine rotates in a low speed or middle speed range, the engine can be operated in a regular change mode of changing speed suddenly, and the running is called as a traveling vehicle. The touring bus is easy to extinguish when serious.
(4) A rack: the test equipment for calibrating the engine is used for calibrating various performance parameters of the engine, including engine rotating speed, engine torque, fuel injection quantity, emission and the like.
(5) Oil consumption rate: which may also be referred to as fuel consumption, refers to the amount of fuel consumed per hour unit of available work, typically expressed as fuel consumption per kilowatt-hour. Oil consumption is typically given in grams/kilowatt-hour.
In order to reduce the occurrence of traveling vehicles of a parallel operation unit and reduce the power consumption of a fan, the embodiment of the application provides a diesel engine parallel operation monitoring method, a diesel engine parallel operation monitoring device, electronic equipment and a medium. In order to better understand the technical solution provided by the embodiments of the present application, the basic principle of the solution is briefly described here.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
The technical scheme provided by the embodiment of the application is described below with reference to the accompanying drawings.
Along with the application operating mode of diesel engine is more complicated, often use many diesel engines and the work of driving in parallel, it is not enough to take place high-power pipeline fuel feeding easily, leads to and drives when power exceeds a definite value, seriously influences unit normal use.
For medium and low-end diesel engines, especially mechanical pump diesel engines, a monitoring means for diesel engine parallel operation is often lacked, traveling is easily caused, and fault reasons are very difficult to remove.
In view of this, embodiments of the present application provide a diesel engine parallel operation monitoring method, apparatus, electronic device, and medium, which determine a plurality of single-engine oil consumption rates corresponding to a plurality of diesel engines according to single-engine powers of a plurality of diesel engines connected in parallel operation and branch line pressures of fuel line branches corresponding to the plurality of diesel engines; determining a first relative range according to the oil consumption rates of a plurality of single units; the first relative range represents the discrete degree of the single-machine oil consumption rates of the plurality of diesel engines; if the first relative range is monitored to exceed a preset first threshold value, determining that the parallel operation consistency of the parallel operation unit is abnormal; the first threshold value represents the allowable fluctuation range of the single-engine oil consumption rates of a plurality of diesel engines during parallel operation; the parallel operation unit comprises a plurality of diesel engines connected in parallel operation. The method can determine the discrete degree of the single-machine oil consumption rate based on the pressure of the branch pipeline at the branch of the fuel pipeline and the single-machine power of the parallel operation unit, monitor whether the parallel operation consistency of the parallel operation unit is abnormal or not, can perform early warning on the traveling vehicles of the parallel operation unit in a test or use process, and reduce the occurrence of the traveling vehicles of the parallel operation unit.
The preferred embodiments of the present application will be described below with reference to the accompanying drawings of the specification, it should be understood that the preferred embodiments described herein are merely for illustrating and explaining the present application, and are not intended to limit the present application, and that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The diesel engine parallel monitoring method provided by the embodiment of the present application is further explained below.
As shown in fig. 1, the method comprises the following steps:
and S101, determining a plurality of single-machine oil consumption rates corresponding to the plurality of diesel engines according to the single-machine power of the plurality of diesel engines connected in parallel and the branch pipeline pressure of each fuel pipeline branch corresponding to the plurality of diesel engines.
Specifically, the branch line pressure of each fuel line branch corresponding to a plurality of diesel engines may be obtained by a pressure sensor added to each fuel line branch at the main line branch, as shown in fig. 2, and the parallel operation unit 200 includes 4 diesel engines connected in parallel: the 1# diesel engine, the 2# diesel engine, the 3# diesel engine, the 4# diesel engine, the branched pipeline pressure of each fuel pipeline branch that these 4 diesel engines correspond can be P1, P2, P3, P4 respectively, and the monitoring data including each branch pipeline pressure can be collected the host computer, carries out the analysis that gathers through the host computer.
In a possible implementation manner, determining a plurality of single-unit fuel consumption rates corresponding to a plurality of diesel engines according to the single-unit powers of a plurality of diesel engines connected in parallel and the branch line pressure of each fuel line branch corresponding to the plurality of diesel engines can be implemented by the following steps, as shown in fig. 3:
step S301, determining the fuel flow of each fuel pipeline branch according to the branch pipeline pressure of each fuel pipeline branch corresponding to a plurality of diesel engines connected in parallel.
Specifically, the fuel flow rate may be determined by the following formula:
Q＝P*S*C
wherein Q represents the pipeline flow;
p represents the fuel pressure;
c represents a pipeline coefficient and is related to the pipeline material and the viscosity of the fuel oil;
s represents a pipe sectional area.
And S302, determining the single-machine oil consumption rate of each diesel engine according to the fuel flow of each fuel pipeline branch and the single-machine power of each diesel engine.
During specific implementation, the fuel consumption quality of each fuel pipeline branch in unit time can be determined according to the fuel flow of each fuel pipeline branch, and the single-machine fuel consumption rate of each diesel engine can be determined according to the fuel consumption quality of each fuel pipeline branch in unit time and the single-machine power of each diesel engine.
And S102, determining a first relative range according to the oil consumption rates of the plurality of single machines.
The first relative range represents the discrete degree of the single-machine oil consumption rates of the plurality of diesel engines.
In a possible implementation manner, the first relative difference is determined according to a plurality of single-machine fuel consumption rates, as shown in fig. 4, and the determining may be implemented by the following steps:
step S401, according to the plurality of single-engine oil consumption rates, determining the maximum single-engine oil consumption rate, the minimum single-engine oil consumption rate and the average single-engine oil consumption rate corresponding to the plurality of diesel engines.
Wherein, the average single-machine oil consumption rate is the average value of each single-machine oil consumption rate.
For example, assume a total of n diesel engine parallels, M1, M2, …, Mn; the measured fuel flow of the n fuel pipeline branches is respectively as follows: q1, Q2, …, Qn; dividing the fuel flow by the corresponding single-machine power, and measuring the oil consumption rates of n corresponding single machines: q1, q2, …, qn.
For the above n single-machine oil consumption rates, the maximum single-machine oil consumption rate q can be determinedmaxMinimum unit oil consumption rate qminAverage single-machine oil consumption rate qMean value。
Step S402, determining relative range of the oil consumption rates of the plurality of single machines according to the maximum single machine oil consumption rate, the minimum single machine oil consumption rate and the average single machine oil consumption rate, and obtaining a first relative range.
Specifically, for n single-machine fuel consumption rates, if the maximum fuel consumption rate is determinedOil consumption rate q of single machinemaxMinimum unit oil consumption rate qminAverage single-machine oil consumption rate qMean valueThe relative range of the plurality of unit fuel consumption rates can be determined by the following formula:
φn＝(qmax-qmin)/qmean value*100％。
Determining the relative range phi of the above-mentioned n fuel consumption rates (q1, q2, …, qn) of the single unitnDetermining a first relative polar difference phi from the n individual fuel consumption rates (q1, q2, …, qn)fir。
S103, if the first relative range is monitored to exceed a preset first threshold value, it is determined that the parallel operation consistency of the parallel operation unit is abnormal.
The first threshold represents the allowable fluctuation range of the single-engine oil consumption rates of the multiple diesel engines during parallel operation; the parallel operation unit comprises a plurality of diesel engines connected in parallel operation.
In particular implementations, the first threshold may be 2.5% or 3%.
Exemplarily, assuming that the preset first threshold is 2.5%, if the relative range deviation phi of the n fuel consumption rates (q1, q2, …, qn) is determinednGreater than 2.5%, the first relative difference phifirAnd if the number of the parallel operation units is more than 2.5%, determining that the parallel operation consistency of the parallel operation units is abnormal.
In one possible implementation mode, after the abnormal parallel operation consistency of the parallel operation unit is determined, a first alarm instruction is sent out; the first alarm instruction is used for sending out the abnormal prompt information of the parallel operation.
Illustratively, if the parallel operation consistency of the parallel operation unit is determined to be abnormal, the instrument gives an alarm, represents that the parallel operation fuel consumption rate has large deviation, and prompts field personnel to troubleshoot the problem of the diesel engine.
If phifirAnd if the number of the parallel operation units is less than 2.5%, the parallel operation consistency of the parallel operation units is good.
In a possible implementation manner, the process of monitoring the diesel engine parallel operation further includes: and if the power of the whole parallel operation unit is higher than a preset second threshold value, sending a second alarm instruction.
The second threshold value is the maximum parallel operation power supported by the fuel oil pipelines of the calibrated parallel operation unit; the second alarm instruction is used for sending out prompt information of the risk of the touring bus.
In specific implementation, the second threshold value may be calibrated through a bench test of the parallel operation unit. After the parallel operation, the parallel operation unit operates to a certain power, the oil quantity of a certain fuel pipeline branch changes, the diesel engine of the parallel operation unit can swim accordingly, and the situation that the parallel operation unit swims due to the fact that the fuel flow of the fuel pipeline branch is too low can be judged. The maximum power at the moment can be used as the maximum parallel operation power supported by the fuel pipelines of the parallel operation unit. In the embodiment of the application, the parallel operation unit can be set to operate at every time and cannot exceed the maximum parallel operation power, so that the safety is improved.
It is understood that, in some embodiments, the second threshold may also be obtained by multiplying the maximum parallel operation power supported by the fuel pipelines of the calibrated parallel operation unit by a safety factor. Wherein the safety factor has a value between 0 and 1.
In the embodiment of the present application, the second threshold and/or the safety factor may be specifically set according to actual needs and stored in an ECU of the parallel operation unit, for example, the upper computer in fig. 2.
In a possible implementation manner, as shown in fig. 5, the process of diesel engine parallel monitoring further includes:
and S501, determining a second relative range of the fuel flow and a third relative range of the single-machine power according to the fuel flow of each fuel pipeline branch and the single-machine power of each diesel engine.
In specific implementation, the process of determining the second relative extreme difference of the fuel flow and the third relative extreme difference of the single-machine power is similar to the process of determining the first relative extreme difference according to the plurality of single-machine fuel consumption rates as shown in fig. 4, and the same parts are not described again.
Step S502, if it is monitored that the second relative pole difference and the third relative pole difference do not exceed a preset third threshold value and the parallel operation unit has a car traveling or stopping, a third alarm instruction is sent.
The third alarm instruction is used for sending out abnormal prompt information that a pipeline from the branch pipeline to the diesel engine oil inlet is necked or blocked; the third threshold value characterizes the permissible fuel flow or the fluctuation range of the individual power of the fuel line branch during merging.
In particular implementations, the third threshold may be the same as or different from the first threshold.
In some embodiments, the value of the third threshold may also be 2.5% or 3%; in other embodiments, the third threshold may also be set to a number other than 2.5% and 3% having a value between 2% and 5%.
In the embodiment of this application, when each lateral line flow is unanimous, and the unit power of each diesel engine is unanimous, if the touring car appears or shut down, then report to the police to the suggestion investigation lateral line has the undergauge or blocks up to the diesel engine oil inlet. Wherein, the branch pipeline refers to the fuel pipeline branch of the parallel operation unit.
The flow rates of all branch pipelines are consistent, the single-machine powers of all diesel engines are consistent, and judgment can be carried out through the second relative pole difference and the third relative pole difference which do not exceed the preset third threshold.
According to the diesel engine parallel monitoring method, a plurality of single engine oil consumption rates corresponding to a plurality of diesel engines are determined according to the single engine power of the plurality of diesel engines connected in parallel and the branch pipeline pressure of each fuel pipeline branch corresponding to the plurality of diesel engines; determining a first relative range according to the oil consumption rates of a plurality of single units; the first relative range represents the discrete degree of the single-machine oil consumption rates of the plurality of diesel engines; if the first relative range is monitored to exceed a preset first threshold value, determining that the parallel operation consistency of the parallel operation unit is abnormal; the first threshold value represents the allowable fluctuation range of the single-engine oil consumption rates of a plurality of diesel engines during parallel operation; the parallel operation unit comprises a plurality of diesel engines connected in parallel operation. The method can determine the discrete degree of the single-machine oil consumption rate based on the pressure of the branch pipeline at the branch of the fuel pipeline and the single-machine power of the parallel operation unit, monitor whether the parallel operation consistency of the parallel operation unit is abnormal or not, can perform early warning on the traveling vehicles of the parallel operation unit in a test or use process, and reduce the occurrence of the traveling vehicles of the parallel operation unit.
Based on the same inventive concept, the embodiment of the application also provides a diesel engine parallel operation monitoring device. As shown in fig. 6, the apparatus includes:
the operation parameter module 601 is configured to determine a plurality of single-machine oil consumption rates corresponding to the plurality of diesel engines according to single-machine powers of the plurality of diesel engines connected in parallel and branch pipeline pressures of fuel pipeline branches corresponding to the plurality of diesel engines;
the data analysis module 602 is configured to determine a first relative range according to the oil consumption rates of the plurality of single units; the first relative range represents the discrete degree of the single-machine oil consumption rates of the plurality of diesel engines;
an anomaly judgment module 603, configured to determine that a parallel operation consistency of the parallel operation unit is abnormal if it is monitored that the first relative range exceeds a preset first threshold; the first threshold value represents the allowable fluctuation range of the single-engine oil consumption rates of a plurality of diesel engines during parallel operation; the parallel operation unit comprises a plurality of diesel engines connected in parallel operation.
In one possible implementation, as shown in fig. 7, the method further includes:
the power monitoring module 701 is used for sending a second alarm instruction if the power of the whole parallel operation unit is higher than a preset second threshold value; the second threshold value is the maximum parallel operation power supported by the fuel oil pipelines of the calibrated parallel operation unit; the second alarm instruction is used for sending out prompt information of the risk of the touring bus.
In a possible implementation manner, the operation parameter module 601 is specifically configured to:
determining the fuel flow of each fuel pipeline branch according to the branch pipeline pressure of each fuel pipeline branch corresponding to a plurality of diesel engines connected with the parallel operation;
and determining the single-machine oil consumption rate of each diesel engine according to the fuel flow of each fuel pipeline branch and the single-machine power of each diesel engine.
In a possible implementation manner, the data analysis module 602 is specifically configured to:
determining the maximum single-machine oil consumption rate, the minimum single-machine oil consumption rate and the average single-machine oil consumption rate corresponding to the plurality of diesel engines according to the plurality of single-machine oil consumption rates; the average single-machine oil consumption rate is the average value of the oil consumption rates of the single machines;
and determining the relative range of the oil consumption rates of the plurality of single machines according to the maximum single machine oil consumption rate, the minimum single machine oil consumption rate and the average single machine oil consumption rate to obtain a first relative range.
In a possible implementation manner, the abnormality determining module 603 is further configured to:
sending a first alarm instruction; the first alarm instruction is used for sending out the abnormal prompt information of the parallel operation.
In a possible implementation manner, the data analysis module 602 is further configured to: determining a second relative range of the fuel flow and a third relative range of the single-machine power according to the fuel flow of each fuel pipeline branch and the single-machine power of each diesel engine;
the abnormality determining module 603 is further configured to: if the second relative polar difference and the third relative polar difference do not exceed a preset third threshold value and the parallel operation unit swims or stops, a third alarm instruction is sent; the third alarm instruction is used for sending out abnormal prompt information that the pipeline from the branch pipeline to the diesel engine oil inlet is necked or blocked; the third threshold value characterizes the permissible fuel flow or the fluctuation range of the individual power of the fuel line branch during merging.
Based on the same technical concept, an embodiment of the present application further provides an electronic device, as shown in fig. 8, the electronic device is configured to implement the methods described in the above various method embodiments, for example, implement the method shown in fig. 1, and the electronic device may include a memory 801, a processor 802, an input unit 803, and a display panel 804.
A memory 801 for storing computer programs executed by the processor 802. The memory 801 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function, and the like; the storage data area may store data created according to use of the electronic device, and the like. The processor 802 may be a Central Processing Unit (CPU), a digital processing unit, or the like. The input unit 803 may be used to acquire a user instruction input by a user. The display panel 804 is configured to display information input by a user or information provided to the user, and in this embodiment of the present application, the display panel 804 is mainly used to display a display interface of each application program in the terminal device and a control entity displayed in each display interface. Alternatively, the display panel 804 may be configured in the form of a Liquid Crystal Display (LCD) or an organic light-emitting diode (OLED), and the like.
The embodiment of the present application does not limit the specific connection medium among the memory 801, the processor 802, the input unit 803, and the display panel 804. In the embodiment of the present application, the memory 801, the processor 802, the input unit 803, and the display panel 804 are connected by the bus 805 in fig. 8, the bus 805 is represented by a thick line in fig. 8, and the connection manner between other components is merely illustrative and not limited. The bus 805 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in FIG. 8, but this is not intended to represent only one bus or type of bus.
The memory 801 may be a volatile memory (volatile memory), such as a random-access memory (RAM); the memory 801 may also be a non-volatile memory (non-volatile memory) such as, but not limited to, a read-only memory (rom), a flash memory (flash memory), a Hard Disk Drive (HDD) or a solid-state drive (SSD), or the memory 801 may be any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory 801 may be a combination of the above memories.
A processor 802 for invoking a computer program stored in the memory 801 to perform the embodiment as shown in fig. 1.
The embodiment of the present application further provides a computer-readable storage medium, which stores computer-executable instructions required to be executed by the processor, and includes a program required to be executed by the processor.
In some possible embodiments, the aspects of a diesel engine parallel operation monitoring method provided in the present application may also be implemented in the form of a program product, which includes program code for causing a terminal device to execute the steps in a diesel engine parallel operation monitoring method according to various exemplary embodiments of the present application described above in this specification when the program product runs on the terminal device. For example, the electronic device may perform the embodiment as shown in fig. 1.
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. A readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
The diesel engine parallel operation monitoring program product for the embodiment of the application can adopt a portable compact disc read only memory (CD-ROM) and comprises program codes, and can run on a computing device. However, the program product of the present application is not limited thereto, and in this document, a readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A readable signal medium may include a propagated data signal with readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A readable signal medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Program code for carrying out operations of the present application may be written in any combination of one or more programming languages, including a physical programming language such as Java, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device over any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., over the internet using an internet service provider).
It should be noted that although several units or sub-units of the apparatus are mentioned in the above detailed description, such division is merely exemplary and not mandatory. Indeed, the features and functions of two or more units described above may be embodied in one unit, according to embodiments of the application. Conversely, the features and functions of one unit described above may be further divided into embodiments by a plurality of units.
Further, while the operations of the methods of the present application are depicted in the drawings in a particular order, this does not require or imply that these operations must be performed in this particular order, or that all of the illustrated operations must be performed, to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step execution, and/or one step broken down into multiple step executions.
As will be appreciated by one skilled in the art, 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 embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable document processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable document 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 document 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 document 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.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. A diesel engine parallel operation monitoring method is characterized by comprising the following steps:
determining a plurality of single-machine oil consumption rates corresponding to a plurality of diesel engines according to the single-machine power of the diesel engines connected in parallel and the branch pipeline pressure of each fuel pipeline branch corresponding to the diesel engines;
determining a first relative range according to the oil consumption rates of the plurality of single machines; the first relative range characterizes a discrete degree of the single-engine fuel consumption rates of the plurality of diesel engines;
if the first relative range is monitored to exceed a preset first threshold value, determining that the parallel operation consistency of the parallel operation unit is abnormal; the first threshold value represents the allowable fluctuation range of the single-engine oil consumption rates of the plurality of diesel engines during merging; the parallel operation unit comprises the diesel engines connected with the parallel operation.
2. The method of claim 1, wherein determining a plurality of individual fuel consumption rates corresponding to a plurality of diesel engines according to individual power of the plurality of diesel engines connected in parallel and a branch line pressure of each fuel line branch corresponding to the plurality of diesel engines comprises:
determining the fuel flow of each fuel pipeline branch according to the branch pipeline pressure of each fuel pipeline branch corresponding to a plurality of diesel engines connected with a parallel vehicle;
and determining the single-machine oil consumption rate of each diesel engine according to the fuel flow of each fuel pipeline branch and the single-machine power of each diesel engine.
3. The method of claim 1, wherein determining a first relative worst based on the plurality of fuel consumption rates per unit comprises:
determining the maximum single-machine oil consumption rate, the minimum single-machine oil consumption rate and the average single-machine oil consumption rate corresponding to the plurality of diesel engines according to the plurality of single-machine oil consumption rates; the average single machine oil consumption rate is the average value of the oil consumption rates of the single machines;
and determining the relative range of the oil consumption rates of the plurality of single units according to the maximum single-unit oil consumption rate, the minimum single-unit oil consumption rate and the average single-unit oil consumption rate to obtain the first relative range.
4. The method according to claim 1, wherein after the determining that the parallel operation consistency of the parallel operation unit is abnormal, the method further comprises:
sending a first alarm instruction; the first alarm instruction is used for sending out parallel operation abnormity prompt information.
5. The method of claim 1, further comprising:
if the power of the whole parallel operation unit is higher than a preset second threshold value, sending a second alarm instruction; the second threshold value is the calibrated maximum parallel operation power supported by the fuel oil pipelines of the parallel operation unit; and the second alarm instruction is used for sending out prompt information of the risk of the touring car.
6. The method of claim 2, further comprising:
determining a second relative range of the fuel flow and a third relative range of the single-machine power according to the fuel flow of each fuel pipeline branch and the single-machine power of each diesel engine;
if the second relative pole difference and the third relative pole difference are monitored not to exceed a preset third threshold value, and the parallel operation unit is in a car traveling state or is stopped, a third alarm instruction is sent out; the third alarm instruction is used for sending out abnormal prompt information that the pipeline from the branch pipeline to the diesel engine oil inlet is necked down or blocked; the third threshold value characterizes a fuel flow of the fuel line branch or a fluctuation range of the single-machine power allowed during merging.
7. A diesel engine parallel operation monitoring device is characterized in that the device comprises:
the operating parameter module is used for determining a plurality of single-machine oil consumption rates corresponding to the plurality of diesel engines according to the single-machine power of the plurality of diesel engines connected in parallel and the branch pipeline pressure of each fuel pipeline branch corresponding to the plurality of diesel engines;
the data analysis module is used for determining a first relative range according to the oil consumption rates of the plurality of single machines; the first relative range characterizes a discrete degree of the single-engine fuel consumption rates of the plurality of diesel engines;
the abnormality judgment module is used for determining that the parallel operation consistency of the parallel operation unit is abnormal if the first relative range exceeds a preset first threshold value; the first threshold value represents the allowable fluctuation range of the single-engine oil consumption rates of the plurality of diesel engines during merging; the parallel operation unit comprises the diesel engines connected with the parallel operation.
8. The apparatus of claim 7, further comprising:
the power monitoring module is used for sending a second alarm instruction if the power of the whole parallel operation unit is higher than a preset second threshold value; the second threshold value is the calibrated maximum parallel operation power supported by the fuel oil pipelines of the parallel operation unit; and the second alarm instruction is used for sending out prompt information of the risk of the touring car.
9. An electronic device, comprising a processor and a memory, wherein the memory stores program code which, when executed by the processor, causes the processor to perform the steps of the method of any of claims 1-6.
10. A computer-readable storage medium, wherein a computer program is stored in the computer-readable storage medium, wherein: the computer program, when executed by a processor, implements the method of any of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111476028.9A CN114320596B (en) | 2021-12-06 | 2021-12-06 | Parallel operation monitoring method and device for diesel engine, electronic equipment and medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111476028.9A CN114320596B (en) | 2021-12-06 | 2021-12-06 | Parallel operation monitoring method and device for diesel engine, electronic equipment and medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114320596A true CN114320596A (en) | 2022-04-12 |
| CN114320596B CN114320596B (en) | 2023-05-23 |
Family
ID=81049031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111476028.9A Active CN114320596B (en) | 2021-12-06 | 2021-12-06 | Parallel operation monitoring method and device for diesel engine, electronic equipment and medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114320596B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7403850B1 (en) * | 2005-09-29 | 2008-07-22 | Dynalco Controls Corporation | Automated fault diagnosis method and system for engine-compressor sets |
| CN105115732A (en) * | 2015-07-22 | 2015-12-02 | 观致汽车有限公司 | Method and device for estimating abnormality of internal combustion engine |
| CN110608103A (en) * | 2019-09-26 | 2019-12-24 | 潍柴重机股份有限公司 | Engine control system and control method matched with double-engine single-propeller engine |
| CN111523701A (en) * | 2020-03-27 | 2020-08-11 | 广州亚美信息科技有限公司 | Method and device for evaluating vehicle running condition, computer equipment and storage medium |
| CN113221246A (en) * | 2021-05-17 | 2021-08-06 | 中国科学技术大学先进技术研究院 | Mobile source emission estimation method, system and medium based on transient oil consumption correction |
-
2021
- 2021-12-06 CN CN202111476028.9A patent/CN114320596B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7403850B1 (en) * | 2005-09-29 | 2008-07-22 | Dynalco Controls Corporation | Automated fault diagnosis method and system for engine-compressor sets |
| CN105115732A (en) * | 2015-07-22 | 2015-12-02 | 观致汽车有限公司 | Method and device for estimating abnormality of internal combustion engine |
| CN110608103A (en) * | 2019-09-26 | 2019-12-24 | 潍柴重机股份有限公司 | Engine control system and control method matched with double-engine single-propeller engine |
| CN111523701A (en) * | 2020-03-27 | 2020-08-11 | 广州亚美信息科技有限公司 | Method and device for evaluating vehicle running condition, computer equipment and storage medium |
| CN113221246A (en) * | 2021-05-17 | 2021-08-06 | 中国科学技术大学先进技术研究院 | Mobile source emission estimation method, system and medium based on transient oil consumption correction |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114320596B (en) | 2023-05-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10287935B2 (en) | Virtual filter condition sensor | |
| CN101680457B (en) | Device and method for fault monitoring | |
| EP3159519B1 (en) | Variable geometry turbocharger prognostics | |
| US20130317780A1 (en) | Probability of failure on demand calculation using fault tree approach for safety integrity level analysis | |
| CN112302817A (en) | Fault diagnosis method, device, equipment and storage medium for air inlet pressure sensor | |
| US20110295436A1 (en) | Engine Generator Control Module | |
| US8473147B2 (en) | State of health indicator for a vehicle fuel delivery system | |
| AU2012362593B2 (en) | Apparatus and method for controlling an internal combustion engine | |
| GB2517174A (en) | Assessment of structural health | |
| JP2010090898A (en) | Method and system for determining operating state of pump | |
| CN113530659B (en) | Fan control method and device, electronic equipment and medium | |
| CN103423439A (en) | Method for detecting loss of fluid or blockage in a hydraulic circuit using exponentially weighted moving average (EWMA) filter | |
| CN104471238A (en) | Diagnostics for a starter motor | |
| CN103699058A (en) | Test system and device management apparatus | |
| US20180156150A1 (en) | Alarm system and alarm method | |
| EP2837983A1 (en) | Assessment of structural health of aircraft | |
| CN114320596A (en) | Diesel engine parallel operation monitoring method and device, electronic equipment and medium | |
| KR102131707B1 (en) | Failure diagnosis method for urea spray control system and module thereof | |
| CN116557122A (en) | Urea concentration anomaly monitoring method and device, electronic equipment and storage medium | |
| CN110823577A (en) | Vehicle PCV system fault monitoring method and system, vehicle and storage medium | |
| CN114109594B (en) | Engine fire diagnosis method, engine fire diagnosis device, electronic equipment and storage medium | |
| CN113685259A (en) | Engine thermostat fault judgment method, device and equipment | |
| CN113624434B (en) | Test method and device for hybrid electric drive assembly | |
| CN117627750A (en) | Heating control method and device of engine respirator, electronic equipment and medium | |
| CN117307544A (en) | Installation performance test and evaluation system of inner curve hydraulic motor |
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 |