CN111335981A - Engine oil pressure alarm method and system - Google Patents
Engine oil pressure alarm method and system Download PDFInfo
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- CN111335981A CN111335981A CN202010231549.7A CN202010231549A CN111335981A CN 111335981 A CN111335981 A CN 111335981A CN 202010231549 A CN202010231549 A CN 202010231549A CN 111335981 A CN111335981 A CN 111335981A
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- oil pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/18—Indicating or safety devices
- F01M1/20—Indicating or safety devices concerning lubricant pressure
- F01M1/22—Indicating or safety devices concerning lubricant pressure rendering machines or engines inoperative or idling on pressure failure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/18—Indicating or safety devices
- F01M1/20—Indicating or safety devices concerning lubricant pressure
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention relates to the technical field of automobile safety monitoring, and particularly discloses an oil pressure alarm method and system. The method comprises the following steps: establishing a corresponding relation between the engine speed and the safe engine oil pressure; acquiring real-time engine oil pressure and real-time rotating speed of an engine; and judging whether the real-time engine oil pressure is smaller than the safe engine oil pressure corresponding to the real-time rotating speed, if so, controlling the engine to slow down or stop, and if not, continuing to operate the engine. The problem that after the rotating speed and the torque of an engine in the prior art are greatly improved, the engine oil pressure change range is large, and the requirement for monitoring the engine oil pressure change in a large range cannot be met by an existing pressure alarm system can be solved.
Description
Technical Field
The invention relates to the technical field of automobile safety monitoring, in particular to an oil pressure alarm method and system.
Background
The engine oil pressure alarm system judges whether the engine lubricating system can provide the lubricating oil amount required by the safe operation of the engine by monitoring the engine oil pressure of the main oil duct, and engine fault phenomena such as cylinder pulling and the like caused by insufficient engine oil amount of the lubricating system are prevented.
An engine oil pressure sensor is arranged in a main oil duct of the existing engine, the engine oil pressure of the main oil duct is used as an alarm value when the engine runs at a low rotating speed, and the alarm limit value of the engine oil pressure at the rest rotating speeds is used as a single alarm value.
Chinese patent CN103382865B discloses a method and a device for controlling engine oil pressure alarm opportunity of a hybrid electric vehicle, which judges whether the hybrid electric vehicle is in an idle start-stop state (idle stop or idle start) by adding, when the vehicle is in the idle start-stop state, the rotation speed of the engine is obtained, and when the rotation speed of the engine is lower than a preset rotation speed value, the current alarm state or normal state is maintained, thereby avoiding false alarm of engine oil pressure caused by engine stop during normal idle stop, and further ensuring the accuracy and authenticity of fault prompt of a driver in the driving process.
However, the rotating speed and the torque of the engine which is newly produced at present are greatly improved, the engine oil pressure also has a wide variation range, and the existing pressure alarm system cannot meet the requirement of monitoring the engine oil pressure variation in a large range.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an oil pressure alarm method and system, which can solve the problems that the rotating speed and the torque of an engine are greatly improved, the oil pressure change range is large, and the existing pressure alarm system cannot meet the requirement of monitoring the oil pressure change in a large range.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
the invention provides an oil pressure alarm method, which comprises the following steps:
establishing a corresponding relation between the engine speed and the safe engine oil pressure;
acquiring real-time engine oil pressure and real-time rotating speed of an engine;
and judging whether the real-time engine oil pressure is smaller than the safe engine oil pressure corresponding to the real-time rotating speed, if so, controlling the engine to slow down or stop, and if not, continuing to operate the engine.
On the basis of the scheme, when the real-time oil pressure is smaller than the safe oil pressure:
if the difference value between the real-time engine oil pressure and the safe engine oil pressure is smaller than the set pressure value, judging that the real-time engine oil pressure is larger than or equal to the safe engine oil pressure corresponding to the real-time rotating speed after the engine is decelerated for set time, if so, continuing to operate the engine, and if not, stopping the engine;
and if the difference value between the real-time engine oil pressure and the safe engine oil pressure is greater than the set pressure value, stopping the engine.
On the basis of the scheme, the judgment signal for judging whether the real-time engine oil pressure is smaller than the safe engine oil pressure corresponding to the real-time rotating speed is output to the instrument panel in a logic relation mode.
On the basis of the scheme, when the real-time engine oil pressure is judged to be smaller than the safe engine oil pressure corresponding to the real-time rotating speed, the judgment signal is transmitted to the alarm, and the alarm sends a prompt signal.
On the basis of the scheme, the prompt signal adopts intermittent flashing or buzzing.
In another aspect, the present invention further provides an oil pressure alarm system, including:
the engine oil pressure signal acquisition unit is used for acquiring the real-time engine oil pressure of the engine;
the rotating speed signal acquisition unit is used for acquiring the real-time rotating speed of the engine;
and the signal analysis unit is used for establishing a corresponding relation between the rotating speed of the engine and the safe engine oil pressure, receiving signals of the real-time engine oil pressure and the real-time rotating speed, judging whether the real-time engine oil pressure is smaller than the safe engine oil pressure corresponding to the real-time rotating speed, if so, continuing to operate the engine, and otherwise, controlling the engine to slow down or stop.
On the basis of the scheme, the engine oil pressure monitoring device further comprises an instrument panel which is used for displaying the judgment signal for judging whether the real-time engine oil pressure is smaller than the safe engine oil pressure corresponding to the real-time rotating speed in a logical relation.
On the basis of the scheme, the device further comprises an alarm which is used for sending out a prompt signal according to the judgment signal.
On the basis of the scheme, the alarm is a buzzer or a flashlight.
On the basis of the scheme, the device further comprises a torque signal acquisition unit which is used for detecting the torque of the engine.
Compared with the prior art, the invention has the advantages that: when the engine oil pressure alarming method is used, firstly, the corresponding relation between the engine rotating speed and the safe engine oil pressure is established in advance, then the real-time engine oil pressure and the real-time rotating speed of the engine 1 are obtained, whether the real-time engine oil pressure is smaller than the safe engine oil pressure corresponding to the real-time rotating speed or not is judged, if yes, the engine is controlled to be decelerated or stopped, and if not, the engine continues to run. By means of the design, whether the engine lubricating system can provide the lubricating oil amount required by safe operation of the engine can be judged, and engine fault phenomena such as cylinder pulling and the like caused by insufficient engine oil amount of the lubricating system can be prevented.
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 are 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 creative efforts.
FIG. 1 is a flow chart of an engine oil pressure warning method in an embodiment of the present invention;
FIG. 2 is a system diagram of an oil pressure warning method in an embodiment of the invention.
In the figure: 1. an engine; 2. an engine oil pressure signal acquisition unit; 3. a rotating speed signal acquisition unit; 4. a torque signal acquisition unit; 5. a signal analysis unit; 6. an instrument panel; 7. an alarm.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but 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.
FIG. 1 is a flow chart of an engine oil pressure warning method in an embodiment of the present invention; as shown in FIG. 1, the invention provides an oil pressure alarm method, which comprises the following steps:
s1: and establishing a corresponding relation between the engine speed and the safe engine oil pressure.
S2: the real-time oil pressure and the real-time rotation speed of the engine 1 are acquired.
S3: and judging whether the real-time engine oil pressure is smaller than the safe engine oil pressure corresponding to the real-time rotating speed, if so, controlling the engine to slow down or stop, and if not, continuing to operate the engine.
When the engine oil pressure alarming method is used, firstly, the corresponding relation between the engine rotating speed and the safe engine oil pressure is established in advance, then the real-time engine oil pressure and the real-time rotating speed of the engine 1 are obtained, whether the real-time engine oil pressure is smaller than the safe engine oil pressure corresponding to the real-time rotating speed or not is judged, if yes, the engine is controlled to be decelerated or stopped, and if not, the engine continues to run. By means of the design, whether the engine lubricating system can provide the lubricating oil amount required by safe operation of the engine can be judged, and engine fault phenomena such as cylinder pulling and the like caused by insufficient engine oil amount of the lubricating system can be prevented.
In this embodiment, when the corresponding relationship between the engine speed and the safe engine oil pressure is established, the engine heat engine is completed, a test is performed according to an external characteristic test method, the engine oil pressures at different engine speeds are recorded, a curve of the engine speed and the engine oil pressure is formed, and the curve is fitted by a polynomial expression to obtain a y ═ f (n) curve, where y represents the engine oil pressure and n represents the engine speed. And measuring the engine oil pressure under different loads under the rated working condition, and calculating the amplitude of the engine oil pressure. And (1-a) is defined as a safety factor, and the maximum amplitude value and the minimum oil pressure ratio are taken as acceptable variation coefficients, and the engine oil pressure alarm value can be set as y (limit value) ((1-a) × f (n)).
Preferably, when the real-time oil pressure is less than the safe oil pressure:
if the difference value between the real-time engine oil pressure and the safe engine oil pressure is smaller than the set pressure value, judging that the real-time engine oil pressure is larger than or equal to the safe engine oil pressure corresponding to the real-time rotating speed after the engine is decelerated for set time, if so, continuing to operate the engine, and if not, stopping the engine; and if the difference value between the real-time engine oil pressure and the safe engine oil pressure is greater than the set pressure value, stopping the engine.
In this embodiment, when the real-time oil pressure is less than the safe oil pressure within a certain range, the real-time oil pressure is less than the safe oil pressure possibly caused by interference of the measurement signal, and there is no safety risk after the speed reduction, the torque reduction and the speed reduction of the engine are controlled for a period of time, and then it is determined that the real-time oil pressure is greater than or equal to the safe oil pressure corresponding to the real-time rotation speed, if so, the engine continues to operate, and if not, the engine is stopped. Such a design can eliminate transient signal interference from causing malfunction. If the difference value between the real-time engine oil pressure and the safe engine oil pressure is larger than the set pressure value, the real-time engine oil pressure is too much lower than the safe engine oil pressure, the engine is controlled to immediately reduce the torque and stop after the speed is reduced, and a driver can lean the vehicle to the side in the period of time.
Preferably, the judgment signal for judging whether the real-time oil pressure is smaller than the safe oil pressure corresponding to the real-time rotating speed is output to the instrument panel in a logic relationship manner.
In this embodiment, the judgment signal of whether the real-time oil pressure is smaller than the safe oil pressure corresponding to the real-time rotating speed is output to the instrument panel and displayed in a logical relationship manner, so that a driver can know the operating state of the engine conveniently, and the corresponding operation is facilitated.
Preferably, when the real-time engine oil pressure is judged to be smaller than the safe engine oil pressure corresponding to the real-time rotating speed, the judgment signal is transmitted to the alarm, and the alarm sends a prompt signal.
In this embodiment, the break signal is transmitted to the alarm, so that the alarm sends out a prompt signal, and a driver can find a problem in time and take corresponding measures, for example, prepare to stop at the side for inspection.
Preferably, the prompting signal is an intermittent flashing light or a buzzing sound.
In this embodiment, intermittent flashing or buzzing is used as the prompt signal, so that the driver can be more easily noticed and found in time.
Fig. 2 is a system diagram of an oil pressure warning method in an embodiment of the present invention, and as shown in fig. 2, the present invention further provides an oil pressure warning system, including: the engine oil pressure signal acquisition unit 2 is used for acquiring the real-time engine oil pressure of the engine 1; a rotational speed signal acquisition unit 3 for acquiring a real-time rotational speed of the engine 1; and the signal analysis unit 5 is used for establishing a corresponding relation between the engine speed and the safe engine oil pressure, receiving signals of the real-time engine oil pressure and the real-time speed, judging whether the real-time engine oil pressure is smaller than the safe engine oil pressure corresponding to the real-time speed, if so, continuing to operate the engine, and if not, controlling the engine to slow down or stop.
When the engine oil pressure alarm system is used, firstly, the corresponding relation between the engine rotating speed and the safe engine oil pressure is established in the signal analysis unit 5 in advance, then the real-time engine oil pressure and the real-time rotating speed of the engine 1 are obtained through the engine oil pressure signal acquisition unit 2 and the rotating speed signal acquisition unit 3, and then whether the real-time engine oil pressure is smaller than the safe engine oil pressure corresponding to the real-time rotating speed is judged through the signal analysis unit 5, if yes, the engine is controlled to be decelerated or stopped, and if not, the engine continues to operate. By means of the design, whether the engine lubricating system can provide the lubricating oil amount required by safe operation of the engine can be judged, and engine fault phenomena such as cylinder pulling and the like caused by insufficient engine oil amount of the lubricating system can be prevented.
Preferably, the engine oil pressure monitoring device further comprises an instrument panel 6 for displaying the judgment signal for judging whether the real-time oil pressure is smaller than the safe oil pressure corresponding to the real-time rotating speed in a logical relation.
In this embodiment, the judgment signal indicating whether the real-time oil pressure is smaller than the safe oil pressure corresponding to the real-time rotation speed is output to the instrument panel and displayed in a logical relationship manner, which is beneficial for the driver to know the operating state of the engine, so as to facilitate the corresponding operation.
Preferably, an alarm 7 is further included for the judgment signal to send out a prompt signal.
In this embodiment, the break signal is transmitted to the alarm, so that the alarm sends out a prompt signal, and a driver can find a problem in time and take corresponding measures, for example, prepare to stop at the side for inspection.
Preferably, the alarm 7 is a buzzer or a flashing light.
In this embodiment, intermittent flashing or buzzing is used as the prompt signal, so that the driver can be more easily noticed and found in time.
Preferably, a torque signal acquisition unit 4 is further included for detecting the torque of the engine.
In the embodiment, the torque signal collecting unit 4 collects the torque of the torque engine of the engine, so that the driver can conveniently judge the working state of the engine, and the driver can take corresponding measures, such as preparing to stop at the side for inspection.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The engine oil pressure alarm method is characterized by comprising the following steps:
establishing a corresponding relation between the engine speed and the safe engine oil pressure;
acquiring real-time engine oil pressure and real-time rotating speed of an engine (1);
and judging whether the real-time engine oil pressure is smaller than the safe engine oil pressure corresponding to the real-time rotating speed, if so, controlling the engine to slow down or stop, and if not, continuing to operate the engine.
2. The oil pressure warning method of claim 1, wherein when the real-time oil pressure is less than the safe oil pressure:
if the difference value between the real-time engine oil pressure and the safe engine oil pressure is smaller than the set pressure value, judging that the real-time engine oil pressure is larger than or equal to the safe engine oil pressure corresponding to the real-time rotating speed after the engine is decelerated for set time, if so, continuing to operate the engine, and if not, stopping the engine;
and if the difference value between the real-time engine oil pressure and the safe engine oil pressure is greater than the set pressure value, stopping the engine.
3. The oil pressure warning method according to claim 1, wherein the judgment signal for judging whether the real-time oil pressure is lower than the safe oil pressure corresponding to the real-time rotation speed is output to an instrument panel in a logical relationship.
4. The oil pressure alarm method according to claim 3, wherein when the real-time oil pressure is judged to be lower than the safe oil pressure corresponding to the real-time rotating speed, the judgment signal is transmitted to the alarm device, and the alarm device sends out a prompt signal.
5. An oil pressure alarm method according to claim 4, wherein the prompt signal is an intermittent flash or a buzz.
6. An oil pressure alarm system, comprising:
the engine oil pressure signal acquisition unit (2) is used for acquiring the real-time engine oil pressure of the engine (1);
the rotating speed signal acquisition unit (3) is used for acquiring the real-time rotating speed of the engine (1);
and the signal analysis unit (5) is used for establishing a corresponding relation between the rotating speed of the engine and the safe engine oil pressure, receiving signals of the real-time engine oil pressure and the real-time rotating speed, judging whether the real-time engine oil pressure is smaller than the safe engine oil pressure corresponding to the real-time rotating speed, if so, continuing to operate the engine, and if not, controlling the speed of the engine to be reduced or stopped.
7. An oil pressure alarm system according to claim 6, further comprising an instrument panel (6) for displaying said judgment signal for judging whether the real-time oil pressure is less than the safety oil pressure corresponding to the real-time revolution speed in a logical relationship.
8. An oil pressure alarm system according to claim 7, further comprising an alarm (7) for said judgment signal to send out a prompt signal.
9. An oil pressure alarm system according to claim 8, characterised in that the alarm (7) is a buzzer or a flashing light.
10. An oil pressure alarm system according to claim 6, further comprising a torque signal acquisition unit (4) for detecting the torque of the engine.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010231549.7A CN111335981A (en) | 2020-03-27 | 2020-03-27 | Engine oil pressure alarm method and system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010231549.7A CN111335981A (en) | 2020-03-27 | 2020-03-27 | Engine oil pressure alarm method and system |
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| CN202010231549.7A Pending CN111335981A (en) | 2020-03-27 | 2020-03-27 | Engine oil pressure alarm method and system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112983592A (en) * | 2021-03-09 | 2021-06-18 | 广西玉柴机器股份有限公司 | Security method for monitoring engine oil pressure in real time |
| CN113586199A (en) * | 2021-07-19 | 2021-11-02 | 上海航天智慧能源技术有限公司 | Method for emergency lubricating oil replenishment, engine controller and storage medium |
| CN113685242A (en) * | 2021-07-23 | 2021-11-23 | 东风汽车集团股份有限公司 | Engine oil pressure alarm method and system |
| CN114542231A (en) * | 2022-01-19 | 2022-05-27 | 潍柴动力股份有限公司 | Engine oil pressure control method and system and engine |
| CN114738075A (en) * | 2022-05-05 | 2022-07-12 | 一汽解放汽车有限公司 | Engine output torque control method and device based on engine oil pressure and vehicle |
| CN115095407A (en) * | 2022-05-25 | 2022-09-23 | 潍柴动力股份有限公司 | Diesel engine oil pressure control method and system |
| CN115614125A (en) * | 2022-09-07 | 2023-01-17 | 赛力斯集团股份有限公司 | Variable-displacement oil pump control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112983592A (en) * | 2021-03-09 | 2021-06-18 | 广西玉柴机器股份有限公司 | Security method for monitoring engine oil pressure in real time |
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| CN114738075A (en) * | 2022-05-05 | 2022-07-12 | 一汽解放汽车有限公司 | Engine output torque control method and device based on engine oil pressure and vehicle |
| CN114738075B (en) * | 2022-05-05 | 2023-03-17 | 一汽解放汽车有限公司 | Engine output torque control method and device based on engine oil pressure and vehicle |
| CN115095407A (en) * | 2022-05-25 | 2022-09-23 | 潍柴动力股份有限公司 | Diesel engine oil pressure control method and system |
| CN115095407B (en) * | 2022-05-25 | 2024-03-19 | 潍柴动力股份有限公司 | Diesel engine oil pressure control method and system |
| CN115614125A (en) * | 2022-09-07 | 2023-01-17 | 赛力斯集团股份有限公司 | Variable-displacement oil pump control method |
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Application publication date: 20200626 |