阅读说明：本技术 应急补充润滑油的方法、发动机控制器及存储介质 (Method for emergency lubricating oil replenishment, engine controller and storage medium ) 是由 刘琼琼 唐继旭 张刘海 彭哲封 张小伟 徐强强 于 2021-07-19 设计创作，主要内容包括：本发明公开了一种发动机运行中应急补充润滑油的方法、发动机控制器及存储介质,本发明通过采集发动机油底壳油压,发动机控制器将低油压信号转化为数字量输出；可编程逻辑控制器(PLC)对信号进行滤波处理,控制油泵运行补油；补油后再检测油底壳油压,油压仍然在报警值以下,经过一定时间间隔再次启动油泵补油；连续三次补油后油底壳油压仍然在报警值以下,则强制发动机停机并发出报警信息。本发明能够保护发动机运行过程中由于油压过低而造成的气缸、轴瓦等磨损,避免出现缸体拉伤、发动机报废等重大损失。(The invention discloses a method for supplementing lubricating oil for an engine in an emergency way during running, an engine controller and a storage medium, wherein the engine controller converts a low oil pressure signal into a digital quantity for output by acquiring the oil pressure of an oil pan of the engine; a Programmable Logic Controller (PLC) filters the signals and controls an oil pump to operate and supplement oil; detecting the oil pressure of the oil pan after oil supplement, and restarting the oil pump to supplement oil after a certain time interval when the oil pressure is still below an alarm value; after oil is continuously supplemented for three times, the oil pressure of the oil bottom shell is still below the alarm value, the engine is forced to stop and alarm information is sent out. The invention can protect the cylinder, the bearing bush and the like from being abraded due to over low oil pressure in the running process of the engine, and avoid serious losses such as cylinder body strain, engine scrapping and the like.)

1. A method for emergency lubricating oil replenishment during engine operation, comprising the steps of:

detecting the oil pressure of lubricating oil in real time, wherein in the running process of an engine, a pressure sensor positioned in an oil pan transmits an oil pressure signal of the lubricating oil in the oil pan to an engine controller, and after judgment, the engine controller sends a low oil pressure signal to a programmable logic controller if the oil pressure is too low;

a step of replenishing lubricating oil at a low oil pressure, which is to send an enabling signal to an external oil pump when the programmable logic controller receives the low oil pressure signal; the external oil pump is started when receiving the enabling signal, and lubricating oil is supplemented to an oil pan of the engine for the first time; and when the engine is used for replenishing the oil for the first time, the oil pressure of the lubricating oil is detected again, and if the low oil pressure signal still exists, the external oil pump is started again, and the lubricating oil is replenished to the oil pan of the engine for the second time.

2. The method of claim 1, wherein the oil pressure signal detected by the pressure sensor is an analog signal, and when the oil pressure signal is transmitted to the engine controller, the engine controller compares the actual oil pressure in the analog signal with a predetermined protection threshold, and if the detected actual oil pressure is lower than the protection threshold, a digital signal of low oil pressure is sent as the low oil pressure signal.

3. The method for emergency lubricating oil replenishment during engine operation according to claim 1, wherein the signal received by the programmable logic controller is subjected to filtering detection to determine whether the signal is the low oil pressure signal; if the filtered signal is continuously effective, judging the signal to be the low oil pressure signal; and if the filtered signal disappears or is discontinuous, judging the signal to be signal fluctuation or signal interference.

4. The method of claim 3, wherein when the signal received by the PLC determines a low oil pressure signal, the PLC sends an enable signal to the external oil pump for a duration of time, the emergency oil replenishment counter of the PLC increments a count at the same time, and the PLC sends a low oil pressure prompt.

5. The method of claim 1, wherein the external oil pump is operated within a set time after receiving the enable signal to replenish the engine oil sump with oil.

6. The method for emergency lubricating oil replenishment during engine operation according to claim 1, wherein after the external oil pump replenishes lubricating oil, the time is delayed for a first interval, the programmable logic controller performs filtering detection again to detect whether a low oil pressure signal exists, if the low oil pressure signal disappears, the oil replenishment is determined to be successful, the emergency oil replenishment counter is cleared, and a low oil pressure prompt is sent; if the programmable logic controller can still detect the low oil pressure signal, the oil supplementing failure at this time is judged, the second interval time is delayed, the oil pressure signal is detected again, and if the low oil pressure signal still exists, the external oil pump is started to supplement lubricating oil to the oil pan of the engine.

7. The method of emergency lubricating oil replenishment in engine operation of claim 1, further comprising:

and a fault judgment step, namely judging that a fault exists if the low oil pressure signal still exists after oil is supplemented for three times continuously, controlling the engine to stop forcibly, and giving out an alarm prompt.

8. The method of emergency lubricating oil replenishment during engine operation according to claim 7, wherein the fault is an operating fault of an oil pressure sensor, an oil circuit, an oil sump or an external oil pump.

9. An engine controller comprising a processor, a memory, and an emergency replenishment counter, the processor being configured to execute a computer program stored in the memory to perform the operations of the method of emergency replenishment of lubricating oil in engine operation of claim 1.

10. A storage medium storing instructions adapted to be loaded by a processor to perform the steps of the method for emergency lubricating oil replenishment during engine operation according to any one of claims 1 to 8.

Technical Field

The invention relates to the technical field of engines, in particular to a method for supplementing lubricating oil for an engine in an emergency mode during operation, an engine controller and a storage medium.

Background

The engine is protected by setting a low oil pressure shutdown protection value without an emergency lubricating oil supplementing mechanism in the running process of the conventional engine. Conventional engine oil protection mechanisms have several drawbacks. First, the oil pan lubrication oil pressure fluctuates within a range when the engine normally operates, and if the low oil pressure protection value is set too high, frequent engine stops may be caused, and if the low oil pressure protection value is set too low, wear of important parts of the engine may be accelerated. Secondly, in a scene that the engine needs to run continuously for a long time, although the oil pressure is reduced to a lower value, the engine is not allowed to be stopped and oil is supplemented in an application field, otherwise, the life of people is endangered or great property loss is caused, and the continuous running of the engine under the condition inevitably accelerates the abrasion of main parts, reduces the service life of the engine, and even causes the direct scrapping of the engine.

Disclosure of Invention

The invention provides a method for supplementing lubricating oil for an engine in an emergency manner during running, an engine controller and a storage medium, which are used for solving the technical problems that the lubricating oil cannot be supplemented to the engine under the condition that the engine is not allowed to be stopped and supplemented in an application field, so that the abrasion of main parts is accelerated, the service life of the engine is shortened, and even the engine is directly scrapped.

The purpose of the invention can be realized by the following technical scheme: a method for emergency lubricating oil replenishment during engine operation, comprising the steps of:

detecting the oil pressure of lubricating oil in real time, wherein in the running process of an engine, a pressure sensor positioned in an oil pan transmits an oil pressure signal of the lubricating oil in the oil pan to an engine controller, and after judgment, the engine controller sends a low oil pressure signal to a programmable logic controller if the oil pressure is too low;

a step of supplementing lubricating oil at a low oil pressure, wherein when the Programmable Logic Controller (PLC) receives the low oil pressure signal, an enabling signal is sent to an external oil pump; the external oil pump is started when receiving the enabling signal, and lubricating oil is supplemented to an oil pan of the engine for the first time; and when the engine is used for replenishing the oil for the first time, the oil pressure of the lubricating oil is detected again, and if the low oil pressure signal still exists, the external oil pump is started again, and the lubricating oil is replenished to the oil pan of the engine for the second time.

Further, the oil pressure signal detected by the pressure sensor is an analog quantity signal, after the oil pressure signal is transmitted to the engine controller, the engine controller compares the actual oil pressure in the analog quantity signal with a set protection threshold value, and if the detected actual oil pressure is lower than the protection threshold value, a digital signal of low oil pressure is sent as the low oil pressure signal.

Further, the signal received by the Programmable Logic Controller (PLC) is filtered and detected to judge whether the signal is the low oil pressure signal; if the filtered signal is continuously effective, judging the signal to be the low oil pressure signal; and if the filtered signal disappears or is discontinuous, judging the signal to be signal fluctuation or signal interference.

Further, when the signal received by the Programmable Logic Controller (PLC) is judged to be a low oil pressure signal, the Programmable Logic Controller (PLC) sends an enabling signal lasting for a period of time to the external oil pump, an emergency oil supplementing counter of the Programmable Logic Controller (PLC) simultaneously increases a count, and the Programmable Logic Controller (PLC) sends a low oil pressure prompt.

Further, after the external oil pump receives the enabling signal, the external oil pump operates within a set time to supplement lubricating oil for the engine oil pan.

Further, after the external oil pump replenishes lubricating oil, delaying a first interval time, filtering and detecting whether a low oil pressure signal exists by the Programmable Logic Controller (PLC) again, if the low oil pressure signal disappears, judging that the oil replenishing is successful at this time, resetting an emergency oil replenishing counter, and sending a low oil pressure prompt; if the Programmable Logic Controller (PLC) can still detect the low oil pressure signal, the oil supplementing failure at this time is judged, the second interval time is delayed, the oil pressure signal is detected again, and if the low oil pressure signal still exists, the external oil pump is started to supplement lubricating oil to the oil pan of the engine.

Further, the method for emergency lubricating oil replenishment in the operation of the engine further comprises the following steps: and a fault judgment step, namely judging that a fault exists if the low oil pressure signal still exists after oil is supplemented for three times continuously, controlling the engine to stop forcibly, and giving out an alarm prompt.

Further, the fault is an operation fault of an oil pressure sensor, an oil circuit, an oil pan or an external oil pump.

The invention also provides an engine controller comprising a processor, a memory and an emergency oil replenishment counter, wherein the processor is used for operating a computer program in the memory to execute the operation of the method for emergency oil replenishment during engine operation.

The present invention also provides a storage medium having stored thereon a plurality of instructions adapted to be loaded by a processor for performing the steps of the method for emergency lubricating oil replenishment during engine operation as set forth in any one of the preceding claims.

The invention has the beneficial effects that: under the running state of the engine, the oil pressure of the oil pan can fluctuate in a certain range, the filtering of signals is increased, the frequent signal triggering caused by the oil pressure fluctuation can be reduced, and the instantaneous signal triggering caused by accidental electromagnetic interference can be eliminated; the starting, stopping and continuous working time of oil supply of an oil pump are programmed in a Programmable Logic Controller (PLC), corresponding parameters can be flexibly adjusted according to the oil bottom shell volume and the oil pumping capacity of the oil pump of an engine, and the condition that the engine burns lubricating oil due to excessive oil supply is prevented on the premise that the oil supply quantity is controlled to meet the emergency operation requirement; the engine low oil pressure signal triggers the mechanism of mending oil, sends the suggestion when first low oil pressure mends oil, can remind maintainer to pay close attention to, check out the equipment state, if mend oil failure for the cubic in succession, then lubricating oil pressure sensor, oil circuit, oil pan or external oil pump trouble circumstances such as can appear, the lubricated effect of engine internals has been than relatively poor, and the engine is shut down this moment, sends alarm signal simultaneously, can avoid causing casualties or loss of property because of engine trouble.

Drawings

The technical solution and other advantages of the present application will be presented in the following detailed description of specific embodiments of the present application with reference to the accompanying drawings.

FIG. 1 is a flow chart of a method for emergency lubricating oil replenishment during engine operation according to an embodiment of the present disclosure.

Fig. 2 is a schematic diagram of a method for emergency lubricating oil replenishment during engine operation according to an embodiment of the present disclosure.

Detailed Description

The specific implementation method of the present invention is described in detail in conjunction with the control flow chart, so that those skilled in the art can more clearly understand how to practice the present invention. While the invention has been described in connection with preferred embodiments thereof, these embodiments are merely illustrative, and not restrictive, of the scope of the invention.

The pressure of lubricating oil of the engine oil bottom shell is acquired by a pressure sensor installed in the oil bottom shell. The pressure collected by the lubricating oil pressure sensor is an analog quantity electric signal, the analog quantity electric signal is analyzed into a lubricating oil pressure value through the engine controller, the lubricating oil pressure value is compared with a low oil pressure threshold value set in the engine controller, and if the currently detected lubricating oil pressure is lower than the low oil pressure threshold value, the engine controller outputs a low oil pressure digital quantity signal.

The purpose of the invention can be realized by the following technical scheme: a method for supplementing lubricating oil for an engine in an emergency mode during operation comprises the steps that by collecting oil pressure of an oil pan of the engine, a controller converts a low oil pressure signal into a digital quantity to be output; a Programmable Logic Controller (PLC) filters the signals, controls an oil pump to operate and supplement oil and sends out a low oil pressure prompt; detecting the oil pressure of the oil pan after oil supplement, and restarting the oil pump to supplement oil after a certain time interval when the oil pressure is still below an alarm value; and after oil is supplemented for three times continuously, the low oil pressure signal of the oil sump still exists, and the engine is forced to stop and alarm information is sent out.

Specifically, as shown in fig. 1 and fig. 2, the method for emergency lubricating oil replenishment during engine operation includes the following steps S1-S3.

And S1, detecting the oil pressure of the lubricating oil in real time, wherein in the running process of the engine, a pressure sensor positioned in the oil pan transmits an oil pressure signal of the lubricating oil detected in the oil pan to an engine controller, and after judgment, the engine controller sends a low oil pressure signal to the programmable logic controller if the oil pressure is too low.

S2, a step of supplementing lubricating oil with low oil pressure, wherein when the Programmable Logic Controller (PLC) receives the low oil pressure signal, an enabling signal is sent to an external oil pump; the external oil pump is started when receiving the enabling signal, and lubricating oil is supplemented to an oil pan of the engine for the first time; and when the engine is used for replenishing the oil for the first time, the oil pressure of the lubricating oil is detected again, and if the low oil pressure signal still exists, the external oil pump is started again, and the lubricating oil is replenished to the oil pan of the engine for the second time.

And S3, a fault judgment step, namely judging that a fault exists if the low oil pressure signal still exists after oil is supplemented for three times continuously, controlling the engine to be forcibly stopped, and giving out an alarm prompt. The fault is an operation fault of an oil pressure sensor, an oil circuit, an oil pan or an external oil pump.

In this embodiment, the oil pressure signal detected by the pressure sensor is an analog signal, and after the oil pressure signal is transmitted to the engine controller, the engine controller compares an actual oil pressure in the analog signal with a set protection threshold, and if the detected actual oil pressure is lower than the protection threshold, a digital signal of a low oil pressure is sent as the low oil pressure signal. The protection threshold of the low oil pressure signal is set according to the oil pressure fluctuation range when the engine is normally operated.

In this embodiment, the signal received by the Programmable Logic Controller (PLC) is filtered and detected to determine whether the signal is the low oil pressure signal; if the filtered signal is continuously effective, judging the signal to be the low oil pressure signal; and if the filtered signal disappears or is discontinuous, judging the signal to be signal fluctuation or signal interference.

In this embodiment, when the signal received by the Programmable Logic Controller (PLC) is determined as the low oil pressure signal, the Programmable Logic Controller (PLC) sends an enable signal lasting for a certain time to the external oil pump, the emergency oil supplement counter of the Programmable Logic Controller (PLC) simultaneously increases a count, and the Programmable Logic Controller (PLC) sends the low oil pressure prompt. The oil pump is set for a long time by a Programmable Logic Controller (PLC), and the calculation basis is the oil pan capacity of the engine and the oil pumping flow of the oil pump.

In this embodiment, after the external oil pump receives the enable signal, the external oil pump operates within a set time to replenish lubricating oil to the oil pan of the engine.

In the embodiment, after the external oil pump replenishes lubricating oil, a first interval time is delayed, the Programmable Logic Controller (PLC) filters again to detect whether a low oil pressure signal exists, if the low oil pressure signal disappears, the oil replenishing is judged to be successful, the emergency oil replenishing counter is cleared, and a low oil pressure prompt is sent; if the Programmable Logic Controller (PLC) can still detect the low oil pressure signal, the oil supplementing failure at this time is judged, the second interval time is delayed, the oil pressure signal is detected again, and if the low oil pressure signal still exists, the external oil pump is started to supplement lubricating oil to the oil pan of the engine. After the oil pump replenishes oil once, a Programmable Logic Controller (PLC) calculates the time allowed to run by the engine in a low oil pressure state according to a first interval time set by a timer. It is also contemplated that the total duration of the first interval and the second interval is less than the time that the engine is allowed to operate in the low oil pressure state. Wherein the first interval is preferably 1 minute ± 10 seconds and the second interval is preferably 4-6 minutes.

The invention also provides an engine controller comprising a processor, a memory and an emergency oil replenishment counter, wherein the processor is used for operating a computer program in the memory to execute the operation of the method for emergency oil replenishment during engine operation.

The present invention also provides a storage medium having stored thereon a plurality of instructions adapted to be loaded by a processor for performing the steps of the method for emergency lubricating oil replenishment during engine operation as set forth in any one of the preceding claims.

In the implementation, as shown in fig. 1 and fig. 2, a program for signal processing and logic control needs to be written in a Programmable Logic Controller (PLC). For a low oil pressure signal sent by an engine controller, the filtering time of 20 s-30 s can be set, the low oil pressure signal is filtered, and misoperation caused by oil pressure fluctuation or electromagnetic interference and the like is reduced. And filtering by a Programmable Logic Controller (PLC), if the low oil pressure signal still exists, sending out a prompt that the pressure of the lubricating oil is low, and starting a program for supplementing the lubricating oil. According to the volume of the oil bottom shell of the engine and rated oil pumping parameters of the external oil replenishing pump, the time of the external oil pump needing to continuously pump oil is calculated, and the control of the oil pumping time is realized through a timing program of a Programmable Logic Controller (PLC).

When the method is specifically implemented, the external oil pump pumps oil under the control of a Programmable Logic Controller (PLC) program according to set time, and then the pressure of lubricating oil in the oil pan can gradually rise to a normal working range after a certain time, so that the Programmable Logic Controller (PLC) needs to delay for 1 minute and then detects whether a low oil pressure signal still exists after oil supplement.

In specific implementation, after the external oil pump completes one-time oil supplement, a Programmable Logic Controller (PLC) enters a re-oil supplement protection program, the external oil pump is not allowed to be restarted within 6 minutes, and the phenomenon that the engine burns lubricating oil due to excessive oil supplement is avoided.

During specific implementation, if the pressure of an engine oil pan is restored to a normal range after the external oil pump replenishes lubricating oil, the emergency lubricating oil replenishment is considered to be successful, and maintenance personnel arrange inspection and maintenance in advance according to prompts sent by a Programmable Logic Controller (PLC). If the pressure of the oil pan of the engine is still in the low oil pressure range after the external oil pump replenishes the lubricating oil, the emergency lubricating oil replenishment is considered to fail, and a Programmable Logic Controller (PLC) records the failure times of oil replenishment through a program. And after 6 minutes, the external oil pump replenishes lubricating oil for the second time, if the oil pressure is recovered to a normal value, the number of times of oil replenishing failure is cleared, and if the oil pressure is still in a low oil pressure range, the number of times of oil replenishing failure is increased by one. The failure times of oil supplement reach three times, then can tentatively judge that lubricating oil pressure sensor, oil circuit, oil pan or external oil pump probably have the trouble, and the engine internal lubrication oil mass has been less this moment, and the continuation of operation will cause great damage to engine friction part again, therefore needs the engine to stop operation, and Programmable Logic Controller (PLC) sends out and shuts down and the warning of cubic supplementary lubricating oil failure.

The invention has the beneficial effects that: under the running state of the engine, the oil pressure of the oil pan can fluctuate in a certain range, the filtering of signals is increased, the frequent signal triggering caused by the oil pressure fluctuation can be reduced, and the instantaneous signal triggering caused by accidental electromagnetic interference can be eliminated; the starting, stopping and continuous working time of oil supply of an oil pump are programmed in a Programmable Logic Controller (PLC), corresponding parameters can be flexibly adjusted according to the oil bottom shell volume and the oil pumping capacity of the oil pump of an engine, and the condition that the engine burns lubricating oil due to excessive oil supply is prevented on the premise that the oil supply quantity is controlled to meet the emergency operation requirement; the engine low oil pressure signal triggers the mechanism of mending oil, sends the suggestion when first low oil pressure mends oil, can remind maintainer to pay close attention to, check out the equipment state, if mend oil failure for the cubic in succession, then lubricating oil pressure sensor, oil circuit, oil pan or external oil pump trouble circumstances such as can appear, the lubricated effect of engine internals has been than relatively poor, and the engine is shut down this moment, sends alarm signal simultaneously, can avoid causing casualties or loss of property because of engine trouble. The invention can protect the cylinder, the bearing bush and the like from being abraded due to over low oil pressure in the running process of the engine, and avoid serious losses such as cylinder body strain, engine scrapping and the like.

It should be noted that many variations and modifications of the embodiments of the present invention fully described are possible and are not to be considered as limited to the specific examples of the above embodiments. The above examples are given by way of illustration of the invention and are not intended to limit the invention. In conclusion, the scope of the present invention should include those changes or substitutions and modifications which are obvious to those of ordinary skill in the art.