CN113266455A - Piston cooling nozzle control method, device and system and storage medium - Google Patents
Piston cooling nozzle control method, device and system and storage medium Download PDFInfo
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- CN113266455A CN113266455A CN202010093229.XA CN202010093229A CN113266455A CN 113266455 A CN113266455 A CN 113266455A CN 202010093229 A CN202010093229 A CN 202010093229A CN 113266455 A CN113266455 A CN 113266455A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/06—Arrangements for cooling pistons
- F01P3/08—Cooling of piston exterior only, e.g. by jets
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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
- F01M1/16—Controlling lubricant pressure or quantity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/14—Indicating devices; Other safety devices
- F01P11/16—Indicating devices; Other safety devices concerning coolant temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P2007/146—Controlling of coolant flow the coolant being liquid using valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2025/00—Measuring
- F01P2025/60—Operating parameters
- F01P2025/62—Load
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2025/00—Measuring
- F01P2025/60—Operating parameters
- F01P2025/64—Number of revolutions
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
本发明公开了一种活塞冷却喷嘴控制方法、装置、系统及计算机可读存储介质，方法部分包括：通过获取发动机的水温、发动机转速和发动机负荷等发动机运行参数，并根据水温、发动机转速和发动机负荷控制机油泵电磁阀来调节主油道油压，最后根据主油道油压控制活塞冷却喷嘴；本发明不需要设置单独的活塞冷却喷嘴电磁阀，而是通过设置机油泵电磁阀来调节主油道油压的大小，进而通过主油道油压的大小来控制活塞冷却喷嘴对发动机活塞进行冷却，解决了因设置活塞冷却喷嘴电磁阀造成的机油压力损失和成本较高的问题，降低了机油压力损失和机油泵的功耗，进而提高了发动机活塞的冷却效果和发动机活塞的使用寿命，从而降低了发动机机油消耗和成本。
The invention discloses a method, device, system and computer-readable storage medium for controlling a piston cooling nozzle. The method includes: obtaining engine operating parameters such as water temperature, engine speed and engine load of the engine; The load controls the oil pump solenoid valve to adjust the oil pressure of the main oil passage, and finally controls the piston cooling nozzle according to the oil pressure of the main oil passage; the present invention does not need to set a separate solenoid valve for the piston cooling nozzle, but adjusts the main oil pump solenoid valve by setting the solenoid valve of the oil pump. The size of the oil pressure in the oil passage, and then the piston cooling nozzle is controlled by the oil pressure of the main oil passage to cool the engine piston, which solves the problem of oil pressure loss and high cost caused by setting the solenoid valve of the piston cooling nozzle, and reduces the The oil pressure loss and the power consumption of the oil pump, in turn, improve the cooling effect of the engine piston and the service life of the engine piston, thereby reducing the engine oil consumption and cost.
Description
Technical Field
The present invention relates to the field of engine technologies, and in particular, to a piston cooling nozzle control method, device, system, and computer readable storage medium.
Background
The piston cooling nozzle belongs to a lubricating system of an engine, the engine is generally provided with the piston cooling nozzle which is usually fixedly assembled on an oil duct of the engine, the piston cooling nozzle sprays cooling engine oil to a piston with higher heat load in the operation process of the engine, and the cooling engine oil with lower temperature takes away heat of the piston through heat exchange so as to cool the piston.
In the existing control method for the piston cooling nozzle, a control valve is arranged between the piston cooling nozzle and an oil duct, the control valve is mostly a mechanical valve and an electromagnetic valve, and the oil injection quantity of the piston cooling nozzle is controlled by adjusting the opening size of the control valve. In the control process, firstly, the oil pressure of an engine oil passage is detected, the larger the pressure is, the more heat generated by the engine is, the smaller the oil pressure of the oil passage is, the less heat generated by the engine is, and when the oil pressure of the oil passage is larger, the opening of a control valve on an adjusting oil passage is enlarged, so that the oil injection quantity of a piston cooling nozzle is increased; when the engine oil pressure of the oil duct is smaller, the opening of the control valve on the adjusting oil duct is smaller, so that the oil injection quantity of the piston cooling nozzle is reduced. The electromagnetic valve in the electromagnetic valve control method can be a proportional valve or an on-off valve, and the on-off of the piston cooling nozzle is controlled by controlling the duty ratio of the proportional electromagnetic valve or the on-off of the electromagnetic valve.
In the control method, the engine oil to the piston cooling nozzle needs to flow through the electromagnetic valve, and the electromagnetic valve is required to pass through a larger engine oil flow, so that the electromagnetic valve is larger in size and higher in cost; the electromagnetic valve body has a certain throttling effect on high-pressure oil, so that the pressure of engine oil entering the piston cooling nozzle is reduced, the flow and the speed of the cooling engine oil sprayed by the piston cooling nozzle cannot reach the purpose of cooling the piston, the piston is easily damaged by overheating, in addition, in order to avoid the above situation, the discharge capacity and the power consumption of an engine oil pump are generally required to be increased, the oil consumption of an engine is increased, and the energy conservation and emission reduction are not facilitated.
Disclosure of Invention
The invention provides a piston cooling nozzle control method, a piston cooling nozzle control device, a piston cooling nozzle control system, computer equipment and a storage medium, and aims to solve the problem of how to reduce the oil consumption and the cost of an engine on the basis of cooling a piston through a piston cooling nozzle.
A piston cooling nozzle control method for use in a piston cooling nozzle control system including an engine, an oil pump solenoid valve, and at least one piston cooling nozzle, the method comprising:
obtaining engine operating parameters, wherein the engine operating parameters comprise water temperature of an engine, engine rotating speed and engine load;
controlling the oil pump electromagnetic valve to adjust the oil pressure of a main oil gallery according to the water temperature, the engine speed and the engine load;
and controlling the piston cooling nozzle according to the oil pressure of the main oil gallery.
Further, the piston cooling nozzle control system including a first cooling nozzle and a second cooling nozzle, the piston cooling nozzle being controlled according to the main gallery oil pressure, includes:
when the oil pressure of the main oil gallery is smaller than a first oil pressure, controlling the first cooling nozzle and the second cooling nozzle to be closed;
when the oil pressure of the main oil gallery is greater than or equal to a first oil pressure and less than a second oil pressure, controlling the first cooling nozzle to be opened and controlling the second cooling nozzle to be closed;
and when the oil pressure of the main oil gallery is greater than or equal to the second oil pressure, controlling the first cooling nozzle and the second cooling nozzle to be opened.
Further, the controlling the oil pump solenoid valve to adjust the main oil gallery oil pressure according to the water temperature, the engine speed, and the engine load includes:
when the water temperature is lower than a preset temperature, controlling the oil pump electromagnetic valve to adjust the oil pressure of the main oil gallery according to the engine speed, the engine load and a first preset lookup table;
and when the water temperature is greater than or equal to the preset temperature, controlling the oil pump electromagnetic valve to adjust the oil pressure of the main oil gallery according to the engine speed, the engine load and a second preset lookup table.
Further, the controlling the oil pump solenoid valve to adjust the main oil gallery oil pressure according to the engine speed, the engine load and a second preset look-up table includes:
when the engine speed is greater than or equal to a preset speed and the engine load is greater than or equal to a preset load, controlling the oil pump electromagnetic valve to adjust the oil pressure of the main oil gallery according to the engine speed, the engine load and the second preset lookup table;
and when the rotating speed of the engine is continuously less than a preset rotating speed and the load of the engine is continuously less than a preset load, after delaying a preset time, controlling the electromagnetic valve of the oil pump to regulate the oil pressure of the main oil gallery according to the rotating speed of the engine, the load of the engine and the second preset lookup table.
Further, the second preset lookup table includes an engine speed value, an engine load value, and a main oil gallery oil pressure value, where the engine speed value, the engine load value, and the main oil gallery oil pressure value correspond to each other, and the controlling the oil pump solenoid valve to adjust the main oil gallery oil pressure according to the second preset lookup table includes:
inquiring a corresponding main oil gallery oil pressure value from the second preset inquiry table according to the engine speed and the engine load;
and controlling the oil pump electromagnetic valve according to the corresponding main oil gallery oil pressure value to adjust the main oil gallery oil pressure.
Further, after obtaining the engine operating parameter, the method further comprises:
judging whether a water temperature sensor of the engine fails or not;
when the water temperature sensor fails, switching to a high-pressure mode to control the oil pump electromagnetic valve to adjust the main oil gallery oil pressure to the maximum main oil gallery oil pressure;
and opening the piston cooling nozzle according to the maximum main oil gallery oil pressure.
A piston cooling nozzle control apparatus for use in a piston cooling nozzle control system including an engine, an oil pump solenoid valve, and at least one piston cooling nozzle, the apparatus comprising:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring engine operating parameters, and the engine operating parameters comprise the water temperature of an engine, the engine rotating speed and the engine load;
the adjusting module is used for controlling the oil pump electromagnetic valve to adjust the oil pressure of the main oil gallery according to the water temperature, the engine speed and the engine load;
and the control module is used for controlling the piston cooling nozzle according to the oil pressure of the main oil gallery.
A piston cooling nozzle control apparatus comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the piston cooling nozzle control method when executing the computer program.
A piston cooling nozzle control system comprising an engine, an oil pump solenoid valve, a piston cooling nozzle control arrangement as described above and at least one piston cooling nozzle.
A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the above-mentioned piston cooling nozzle control method.
According to the piston cooling nozzle control method, the device, the system and the computer medium, the water temperature, the engine speed, the engine load and other engine operation parameters are obtained, the oil pressure of the main oil gallery is adjusted by controlling the oil pump electromagnetic valve according to the water temperature, the engine speed and the engine load, and finally the piston cooling nozzle is controlled according to the oil pressure of the main oil gallery; therefore, the invention does not need to arrange a separate piston cooling nozzle electromagnetic valve, but adjusts the oil pressure of the main oil gallery by arranging the oil pump electromagnetic valve, and then controls the piston cooling nozzle to cool the piston of the engine by the oil pressure of the main oil gallery, thereby solving the problems of oil pressure loss and higher cost caused by arranging the piston cooling nozzle electromagnetic valve, reducing the oil pressure loss and the power consumption of the oil pump, further improving the cooling effect of the engine piston and the service life of the engine piston, and further reducing the oil consumption and the cost of the engine.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a schematic diagram of a piston cooling nozzle control system in an embodiment of the present invention;
FIG. 2 is a schematic flow diagram of a method of controlling a piston cooling nozzle in accordance with an embodiment of the present invention;
FIG. 3 is a schematic flow chart of step S30 in FIG. 2 according to the present invention;
FIG. 4 is a schematic flow chart illustrating the step S20 in FIG. 2 according to the present invention;
FIG. 5 is a schematic view showing the structure of a piston cooling nozzle control apparatus according to an embodiment of the present invention;
FIG. 6 is another schematic diagram of the piston cooling nozzle control apparatus according to the embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. 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 invention.
The piston cooling nozzle control method provided by the embodiment of the invention can be applied to a piston cooling nozzle control system shown in fig. 1, and the piston cooling nozzle control system comprises an engine 100, a piston cooling nozzle control device 101, an oil pump electromagnetic valve 102 and at least one piston cooling nozzle 103. The piston cooling nozzle control system further comprises an oil pump, an oil pressure sensor and a water temperature sensor. The engine 100, the oil pump solenoid valve 102 and the at least one piston cooling nozzle 103 are connected to a cooling nozzle control device 101, wherein the cooling nozzle control device 101 is used for implementing the piston cooling nozzle control method provided by the embodiment of the invention. In one embodiment, the piston cooling nozzle Control device 101 may be implemented by an Electronic Control Unit (ECU).
In one embodiment, as shown in fig. 2, a piston cooling nozzle control method is provided, which is described by taking the piston cooling nozzle control device in fig. 1 as an example, and includes the following steps:
s10: engine operating parameters are obtained, including water temperature of the engine, engine speed, and engine load.
When the engine is in a running state, the piston cooling nozzle control device obtains real-time running parameters of the engine, wherein the running parameters of the engine comprise the water temperature of the engine, the engine rotating speed and the engine load.
The water temperature of the engine can be directly obtained by a water temperature sensor, and the above engine speed and engine load can be directly obtained by other detection sensors, which are not described herein. In other embodiments, the water temperature of the engine, the rotational speed of the engine, and the engine load may also be obtained in other manners, for example, by reading the operating parameters of the engine through a central control meter, which is not described herein again.
S20: and controlling an electromagnetic valve of the oil pump to adjust the oil pressure of the main oil gallery according to the water temperature, the engine speed and the engine load.
In the existing control method, generally, a separate piston cooling nozzle control valve is arranged in a piston cooling nozzle oil passage between an oil passage and a piston cooling nozzle, and the amount of oil injected by the piston cooling nozzle is controlled by determining the size of an opening of the control valve according to oil pressure of the oil passage. Therefore, in order to solve the problem of engine oil pressure loss caused by the arrangement of the piston cooling nozzle electromagnetic valve, the piston cooling nozzle control valve is not separately arranged, but the engine oil pump electromagnetic valve is directly arranged, and the engine oil pump electromagnetic valve is used for controlling the output oil quantity of the engine oil pump so as to achieve the purpose of adjusting the pressure of the main oil gallery.
After obtaining real-time parameters of water temperature, engine speed, engine load and the like of the engine, the piston cooling nozzle control device sends corresponding duty ratio instructions to the oil pump electromagnetic valve according to the current water temperature, the engine speed and the engine load of the engine, and the oil pump electromagnetic valve adjusts the oil output of the oil pump according to the corresponding duty ratio after receiving the corresponding duty ratio instructions, so that the oil pump outputs the corresponding main oil gallery oil pressure. The electromagnetic valve of the oil pump is arranged in the main oil gallery to control the proportional valve of the oil pump.
For example, the oil pump solenoid valve has a duty cycle of 40% and the main gallery oil pressure corresponds to P1The piston cooling nozzle control device sends a 40% duty ratio instruction to the oil pump electromagnetic valve, and the oil pump electromagnetic valve adjusts the oil output of the oil pump after receiving the 40% duty ratio instruction, so that the oil pressure on the main oil gallery is P1So as to be later based on the detected main gallery oil pressure P1To control the opening of the piston cooling nozzle to cool the working engine piston.
In other embodiments, the oil pump solenoid valve may also be another type of solenoid valve, such as an on-off valve, which is not described herein.
S30: and controlling the piston cooling nozzle according to the oil pressure of the main oil gallery.
After the piston cooling nozzle control device controls the oil pump electromagnetic valve to adjust the oil pressure of the main oil gallery according to the current water temperature, the engine rotating speed and the engine load, the oil pressure sensor on the main oil gallery detects the oil pressure of the main oil gallery, and the piston cooling nozzle control device controls the opening and closing of the piston cooling nozzle according to the oil pressure of the main oil gallery detected by the oil pressure sensor so as to cool the working engine piston.
For example, when the engine speed is high, the thermal load of the engine piston is high, the piston cooling nozzle control device sends a corresponding duty ratio to the oil pump solenoid valve, the oil pump solenoid valve adjusts the oil output of the oil pump after receiving a corresponding duty ratio instruction, so that the oil pressure on the main oil gallery is the corresponding oil pressure of the main oil gallery, the oil pressure of the main oil gallery detected by the oil pressure sensor on the main oil gallery meets the opening condition, the piston cooling nozzle control device controls the piston cooling nozzle to open, the cooling oil is sprayed to the engine piston with high thermal load, and the heat of the piston is taken away by the cooling oil with low temperature through heat exchange; when the engine speed is low, the heat load of the engine piston is not high, the piston cooling nozzle control device sends a corresponding duty ratio to the electromagnetic valve of the oil pump, the oil pump outputs low oil pressure of the main oil gallery, the oil pressure of the main oil gallery detected by an oil pressure sensor on the main oil gallery does not accord with the opening condition, and the piston cooling nozzle control device controls the piston cooling nozzle to close and stops cooling the engine piston.
In the embodiment, the oil pressure of the main oil gallery is adjusted by acquiring engine operating parameters such as water temperature, engine rotating speed and engine load, controlling an oil pump electromagnetic valve according to the water temperature, the engine rotating speed and the engine load, and finally controlling a piston cooling nozzle to cool an engine piston according to the oil pressure of the main oil gallery; the invention does not use an independent piston cooling nozzle electromagnetic valve, solves the problems of oil pressure loss and higher cost caused by the arrangement of the piston cooling nozzle electromagnetic valve, reduces the oil pressure loss and the power consumption of the oil pump, further improves the cooling effect of the engine piston and the service life of the engine piston, and further reduces the oil consumption and the cost of the engine.
In an embodiment, the piston cooling nozzle in the piston cooling nozzle control system includes a first cooling nozzle and a second cooling nozzle, as shown in fig. 3, and in step S10, namely, the piston cooling nozzle is controlled according to the main oil gallery oil pressure, the method specifically includes the following steps:
s31: and when the oil pressure of the main oil gallery is less than the first oil pressure, controlling the first cooling nozzle and the second cooling nozzle to be closed.
In this embodiment, each piston is provided with two piston cooling nozzles with different opening pressures, which are a first cooling nozzle and a second cooling nozzle, respectively, the opening oil pressure of the first cooling nozzle is a first oil pressure, and the opening oil pressure of the second cooling nozzle is a second oil pressure, where the first oil pressure is less than the second oil pressure.
When the current oil pressure of the main oil gallery detected by an oil pressure sensor on the main oil gallery is less than the first oil pressure, the opening oil pressures of the first cooling nozzle and the second cooling nozzle cannot be reached, the piston cooling nozzle control device controls the first cooling nozzle and the second cooling nozzle to be closed, and the piston of the engine is not cooled, so that the power consumption of the oil pump and the oil consumption of the engine are saved.
For example, the first oil pressure is P1When the oil pressure of the main oil gallery is P, an oil pressure sensor on the main oil gallery detects that the oil pressure P of the main oil gallery is less than P1And the opening oil pressure of the first cooling nozzle and the second cooling nozzle cannot be achieved, the piston cooling nozzle control device controls the first cooling nozzle and the second cooling nozzle to be closed, and the engine piston is not cooled, so that the power consumption of the oil pump and the oil consumption of the engine are saved.
S32: and when the oil pressure of the main oil gallery is greater than or equal to the first oil pressure and less than the second oil pressure, controlling the first cooling nozzle to be opened and controlling the second cooling nozzle to be closed.
When the current oil pressure of the main oil gallery detected by an oil pressure sensor on the main oil gallery is greater than or equal to the first oil pressure and less than the second oil pressure, the current oil pressure of the main oil gallery reaches the opening oil pressure of the first cooling nozzle but does not reach the opening oil pressure of the second cooling nozzle, the piston cooling nozzle control device controls the first cooling nozzle to be opened and controls the second cooling nozzle to be closed, the opened first cooling nozzle sprays cooling oil to the engine piston, and the cooling oil with lower temperature takes away the heat of the piston through heat exchange so as to achieve the purpose of cooling the engine piston.
For example, the current main gallery oil pressure is P, and the second oil pressure is P2When P is1≤P<P2When the oil pressure of the current main oil gallery reaches the opening oil pressure of the first cooling nozzle but does not reach the opening oil pressure of the second cooling nozzle, the piston cooling nozzle control device controls the first cooling nozzle to be opened and controls the second cooling nozzle to be closed, the opened first cooling nozzle sprays cooling oil to the engine piston, and the cooling oil with lower temperature takes away the heat of the piston through heat exchange.
S33: and when the oil pressure of the main oil gallery is greater than or equal to the second oil pressure, controlling the first cooling nozzle and the second cooling nozzle to be opened.
When the current oil pressure of the main oil gallery detected by an oil pressure sensor on the main oil gallery is greater than or equal to the second oil pressure, the opening oil pressures of the first cooling nozzle and the second cooling nozzle are reached, the piston cooling nozzle control device controls the first cooling nozzle and the second cooling nozzle to be opened simultaneously, and the first cooling nozzle and the second cooling nozzle spray cooling oil to the engine piston simultaneously to cool the engine piston efficiently.
For example, when P ≧ P2When the engine piston cooling device is used, the oil pressure of the first cooling nozzle and the oil pressure of the second cooling nozzle are reduced, the piston cooling nozzle control device controls the first cooling nozzle and the second cooling nozzle to be opened simultaneously, and the first cooling nozzle and the second cooling nozzle spray cooling oil to the engine piston simultaneously to cool the engine piston efficiently.
In this embodiment, it is only described that the piston cooling nozzles include two piston cooling nozzles, namely, a first cooling nozzle and a second cooling nozzle, and the opening oil pressures of the first cooling nozzle and the second cooling nozzle are respectively the first oil pressure and the second oil pressure, in other embodiments, one engine piston may further include a plurality of piston cooling nozzles and opening oil pressures corresponding to the plurality of piston cooling nozzles, for example, three piston cooling nozzles are correspondingly provided with 3 opening oil pressures, which is not described herein again.
In this embodiment, the piston cooling nozzles are provided in two: the first cooling nozzle and the second cooling nozzle are respectively used as opening oil pressures of the first cooling nozzle and the second cooling nozzle, different opening oil pressures are set to respectively control the opening and the closing of the piston cooling nozzle, and then the engine piston is controlled to be cooled.
In one embodiment, as shown in fig. 3, after step S10, i.e. after obtaining the engine operating parameters, the piston cooling nozzle control method further comprises the steps of:
s40: and judging whether a water temperature sensor of the engine has a fault or not.
In order to ensure normal and stable running of the engine, after the engine is started, the piston cooling nozzle control device acquires real-time engine running parameters and judges whether a water temperature sensor of the engine breaks down or not according to the acquired engine running parameters.
For example, after the piston cooling nozzle control device obtains real-time engine operating parameters, if the water temperature of the engine in the engine operating parameters is continuously unchanged, the water temperature sensor of the engine is judged to be in fault. In other embodiments, there are other ways to determine that the water temperature sensor of the engine is faulty, which are not described herein.
S41: when the water temperature sensor fails, the water temperature sensor is switched to a high-pressure mode to control the oil pump solenoid valve to adjust the main oil gallery oil pressure to the maximum main oil gallery oil pressure.
When the water temperature sensor of the engine breaks down, the piston cooling nozzle control device is switched to a high-voltage mode, the piston cooling nozzle control device directly sends a highest duty ratio instruction to the oil pump electromagnetic valve, and after the oil pump electromagnetic valve receives the highest duty ratio instruction, the oil output of the oil pump is regulated according to the highest duty ratio instruction, so that the oil pump outputs the maximum main oil gallery oil pressure.
S42: and opening the piston cooling nozzle according to the maximum main oil gallery oil pressure.
After the oil pressure of the main oil gallery is regulated to the maximum oil pressure of the main oil gallery by the oil pressure sensor on the main oil gallery, the piston cooling nozzle control device can detect that the oil pressure of the main oil gallery meets the opening condition of the piston cooling nozzle through the oil pressure sensor on the main oil gallery, so that the piston cooling nozzle can be rapidly controlled to be opened, the piston of the engine is rapidly cooled, and the normal operation of the engine is ensured.
In the embodiment, before the operation parameters of the engine are acquired, whether the water temperature sensor of the engine breaks down is judged, when the water temperature sensor breaks down, the oil pump electromagnetic valve is controlled to adjust the oil pressure of the main oil gallery to the maximum oil pressure of the main oil gallery by switching to a high-pressure mode, and the piston cooling nozzle is opened according to the maximum oil pressure of the main oil gallery to rapidly cool the piston of the engine, so that the normal operation of the engine is ensured, the overheating condition of the piston of the engine caused by the fact that the water temperature sensor breaks down is reduced, the service life of the piston of the engine is prolonged, and the cost is reduced.
In one embodiment, as shown in fig. 3, after determining that the water temperature sensor of the engine has no fault, in step S20, controlling the electromagnetic valve of the oil pump to adjust the main oil gallery oil pressure according to the water temperature of the engine, the engine speed and the engine load, the method specifically includes the following steps:
s21: and judging whether the water temperature is lower than a preset temperature.
S22: and when the water temperature is lower than the preset temperature, controlling an electromagnetic valve of the oil pump to adjust the oil pressure of the main oil gallery according to the rotating speed of the engine, the load of the engine and a first preset lookup table.
The temperature of engine cooling liquid is detected through a water temperature sensor to obtain the current water temperature, the engine rotating speed and the engine load of the engine, when the current water temperature is lower than the preset temperature, the piston cooling nozzle control device searches the corresponding main oil gallery oil pressure in a first preset query table according to the current engine rotating speed and the engine load, and sends corresponding duty ratio to the oil pump electromagnetic valve according to the corresponding main oil gallery oil pressure, so that the oil pump electromagnetic valve adjusts the engine oil output of the oil pump according to the corresponding duty ratio, and the main oil gallery oil pressure on the main oil gallery is adjusted.
The first preset lookup table is a preconfigured lookup table used when water temperature is lower than a preset temperature, and the first preset lookup table comprises data such as engine rotating speed, engine load, main oil gallery oil pressure and the like, so that the piston cooling nozzle control device can query the main oil gallery oil pressure according to the current engine rotating speed and engine load. The data of the first preset lookup table are obtained after the water temperature of the engine is tested under different engine rotating speeds and different engine loads.
For example, the water temperature sensor detects the temperature of the engine coolant to obtain the current water temperature, the engine speed and the engine load of the engine, if the current water temperature is lower than the preset water temperature, the piston cooling nozzle control device searches the main oil gallery oil pressure corresponding to the current engine speed and the engine load in a first preset lookup table, and sends a corresponding duty ratio to the oil pump solenoid valve according to the corresponding main oil gallery oil pressure, so that the oil pump solenoid valve adjusts the oil output of the oil pump according to the corresponding duty ratio, and the main oil gallery oil pressure on the main oil gallery is adjusted.
S23: and when the water temperature is greater than or equal to the preset temperature, controlling the oil pump electromagnetic valve to adjust the oil pressure of the main oil gallery according to the engine speed, the engine load and a second preset look-up table.
The method comprises the steps of detecting the temperature of engine coolant through a water temperature sensor to obtain the current water temperature, the engine rotating speed and the engine load of an engine, determining a corresponding strategy according to the engine rotating speed, the engine load and a second preset query table when the current water temperature is greater than or equal to a preset temperature, searching the corresponding main oil gallery oil pressure in the second preset query table according to the corresponding strategy, sending a corresponding duty ratio to an oil pump electromagnetic valve according to the corresponding main oil gallery oil pressure, enabling the oil pump electromagnetic valve to adjust the engine oil output of the oil pump according to the corresponding duty ratio, and accordingly adjusting the main oil gallery oil pressure on the main oil gallery.
The first preset lookup table is a preconfigured lookup table used when water temperature is higher than a preset temperature, and the second preset lookup table comprises data such as engine rotating speed, engine rotating speed and main oil gallery oil pressure, so that the piston cooling nozzle control device can query the main oil gallery oil pressure according to the current engine rotating speed and engine load. The data of the second preset lookup table are obtained after the water temperature of the engine is tested under different engine rotating speeds and different engine loads.
For example, the water temperature sensor detects the temperature of the engine coolant to obtain the current water temperature, the engine speed and the engine load of the engine, if the current water temperature is greater than or equal to the preset water temperature, the piston cooling nozzle control device determines a corresponding strategy in a second preset lookup table according to the current data of the engine speed, the engine load and the like, searches for the corresponding main oil gallery oil pressure according to the corresponding strategy, and sends a corresponding duty ratio to the oil pump solenoid valve according to the corresponding main oil gallery oil pressure, so that the oil pump solenoid valve adjusts the oil output of the oil pump according to the corresponding duty ratio, and the main oil gallery oil pressure on the main oil gallery is adjusted.
Further, as shown in fig. 4, when the water temperature is greater than or equal to the preset temperature, in step S23, the method controls the oil pump electromagnetic valve to adjust the main oil gallery oil pressure according to the engine speed, the engine load and the second preset look-up table, and specifically includes the following steps:
s231: and judging whether the engine speed is continuously less than the preset speed and the engine load is continuously less than the preset load.
S232: and when the rotating speed of the engine is greater than or equal to the preset rotating speed and the load of the engine is greater than or equal to the preset load, controlling the electromagnetic valve of the oil pump to adjust the oil pressure of the main oil gallery according to the rotating speed of the engine, the load of the engine and a second preset look-up table.
When the current rotating speed of the engine is greater than or equal to the preset rotating speed and the load of the engine is greater than or equal to the preset load, the corresponding main oil gallery oil pressure is searched in the second preset query table according to the current rotating speed and the load of the engine, and the corresponding duty ratio is sent to the oil pump electromagnetic valve according to the corresponding main oil gallery oil pressure, so that the oil pump electromagnetic valve regulates the oil output of the oil pump according to the corresponding duty ratio, and the main oil gallery oil pressure on the main oil gallery is regulated.
For example, when the preset rotation speed is 1500 rpm, the preset load is 50%, and the current engine rotation speed and the current engine load are simultaneously greater than or equal to the preset value, that is, the current engine rotation speed is greater than or equal to 1500 rpm and the current engine load is greater than or equal to 50%, the piston cooling nozzle control device directly searches the corresponding main oil gallery oil pressure in the second preset lookup table according to the current engine rotation speed and the current engine load of the engine, and sends a corresponding duty ratio to the oil pump solenoid valve according to the corresponding main oil gallery oil pressure, so that the oil pump solenoid valve adjusts the oil output of the oil pump according to the corresponding duty ratio, thereby adjusting the main oil gallery oil pressure on the main oil gallery.
S233: and when the rotating speed of the engine is continuously less than the preset rotating speed and the load of the engine is continuously less than the preset load, after delaying the preset time, controlling the electromagnetic valve of the oil pump to adjust the oil pressure of the main oil gallery according to the rotating speed of the engine, the load of the engine and a second preset look-up table.
And when the rotating speed of the engine is continuously less than the preset rotating speed and the load of the engine is continuously less than the preset load, delaying the preset time, and controlling the electromagnetic valve of the oil pump to adjust the oil pressure of the main oil gallery according to a second preset look-up table of the rotating speed and the load of the engine.
In the existing piston cooling nozzle control method, the control of the piston cooling nozzle when the engine is switched from high rotating speed to low rotating speed or from high load to low load is not involved, so that oil pressure fluctuation exists when the engine is decelerated or the load is reduced, if the engine rotating speed or the load is at the boundary of the control of the piston cooling nozzle, an oil pump electromagnetic valve continuously responds, and at the moment, a time delay is needed to be carried out when the engine is decelerated or the load is reduced, and then the piston cooling nozzle control is carried out.
When the engine speed is continuously less than the preset speed, the engine is switched from a high speed to a low speed, and when the engine load is continuously less than the preset speed, the engine is switched from a high load to a low load. When the rotating speed of the engine is continuously less than the preset rotating speed and the load of the engine is continuously less than the preset load, delaying the preset time, and after delaying the preset time, the piston cooling nozzle control device can search the corresponding main oil gallery oil pressure in the second preset query table according to the current rotating speed and the load of the engine, and send a corresponding duty ratio to the oil pump electromagnetic valve according to the corresponding main oil gallery oil pressure, so that the oil pump electromagnetic valve regulates the oil output of the oil pump according to the corresponding duty ratio, and the main oil gallery oil pressure on the main oil gallery is regulated.
For example, the preset time is 5 seconds, the preset rotation speed is 1500 rpm, the preset load is 50%, the current engine rotation speed and the current engine load are continuously less than the preset values, that is, the current engine rotation speed is continuously less than 1500 rpm and the current engine load is continuously less than 50%, after delaying for 5 seconds, the piston cooling nozzle control device searches for the corresponding main oil gallery oil pressure in the second preset lookup table according to the current engine rotation speed and the current engine load of the engine, and sends a corresponding duty ratio to the oil pump solenoid valve according to the corresponding main oil gallery oil pressure, so that the oil pump solenoid valve adjusts the oil output of the oil pump according to the corresponding duty ratio, thereby adjusting the main oil gallery oil pressure on the main oil gallery.
In this embodiment, the preset rotation speed, the preset temperature and the preset duration are exemplary values, and in other embodiments, the preset rotation speed, the preset temperature and the preset duration may also be other values, which are not described herein again.
In this embodiment, if the water temperature is less than the preset temperature, the control strategy is determined according to whether the current engine speed and the current engine load of the engine correspond to the oil pressure of the main oil gallery in the first preset lookup table, if the water temperature is greater than or equal to the preset temperature, the control strategy is determined according to whether the current engine speed and the current engine load are less than the preset values, when the engine switches from a high speed to a low speed and from a high load to a low load, a delay of a preset duration is added, and then the piston cooling nozzle is controlled according to the engine speed, the engine load and the second preset lookup table, so that when the engine speed or the load is switched, the continuous response of the oil pump electromagnetic valve caused by the fluctuation of the engine speed and the load is reduced, and the service life of the oil pump electromagnetic valve is prolonged.
In an embodiment, the data of the first preset lookup table and the second preset lookup table includes an engine speed value, an engine load value, and a main oil gallery oil pressure value, where the engine speed value, the engine load value, and the main oil gallery oil pressure value correspond to each other, and in step S23, the oil pump electromagnetic valve is controlled to adjust the main oil gallery oil pressure according to the second preset lookup table, which specifically includes the following steps:
s201: and inquiring the corresponding main oil gallery oil pressure value from a second preset inquiry table according to the current engine speed and the current engine load.
In this embodiment, the first preset lookup table or the second preset lookup table may be a three-dimensional MAP, where the three-dimensional MAP is a three-dimensional MAP that is tested at different engine speeds and at different average effective pressures in cylinders to obtain the main oil gallery oil pressure data under different working conditions, where an x coordinate is the engine speed, a y coordinate is the engine load, and a z coordinate is the main oil gallery oil pressure. The piston cooling nozzle control device can inquire the oil pressure of the main oil gallery according to the current engine speed and the current average effective pressure in the cylinder.
When the engine runs, the piston cooling nozzle control device can acquire engine running parameters such as the engine speed, the cylinder air inlet temperature, the cylinder air inlet pressure and the like in real time, and calculate the current engine load according to the current engine speed, the cylinder air inlet temperature and the cylinder air inlet pressure.
After the current engine load is calculated according to the current engine speed, the cylinder air inlet temperature, the cylinder air inlet pressure and the like, the piston cooling nozzle control device searches a corresponding main oil gallery oil pressure value in a second preset query (a three-dimensional MAP) according to the current engine speed and the current engine load, a corresponding duty ratio is sent to an oil pump electromagnetic valve according to the corresponding main oil gallery oil pressure value, and the oil pump electromagnetic valve regulates the oil output of an oil pump according to the corresponding duty ratio, so that the main oil gallery oil pressure on a main oil gallery is regulated.
S202: and controlling an oil pump electromagnetic valve according to the corresponding main oil gallery oil pressure value to adjust the main oil gallery oil pressure.
After the oil pump electromagnetic valve is controlled according to the corresponding main oil gallery oil pressure value to adjust the main oil gallery oil pressure, the piston cooling nozzle control device detects whether the main oil gallery oil pressure reaches an oil pressure condition for opening the piston cooling nozzle through an oil pressure sensor on the main oil gallery to control the opening and closing of the piston cooling nozzle so as to cool the engine piston.
In the embodiment, the engine load is calculated according to the engine speed, the cylinder air inlet temperature and the cylinder air inlet pressure by obtaining the current engine speed value, the corresponding main oil gallery oil pressure value is inquired from the second preset inquiry table according to the current engine speed and the current engine load, and the oil pump electromagnetic valve is controlled according to the corresponding main oil gallery oil pressure value to adjust the main oil gallery oil pressure so as to cool the engine piston.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
In one embodiment, a piston cooling nozzle control device is provided, which corresponds to the piston cooling nozzle control method in the above-described embodiment one to one. As shown in fig. 5, the piston cooling nozzle control device is applied to a piston cooling nozzle control system, the piston cooling nozzle control system comprises an engine, an oil pump solenoid valve and at least one piston cooling nozzle, and the piston cooling nozzle control device comprises an acquisition module 501, a regulation module 502 and a control module 503. The functional modules are explained in detail as follows:
the acquisition module is used for acquiring engine operating parameters, wherein the engine operating parameters comprise the water temperature of an engine, the engine rotating speed and the engine load;
the adjusting module is used for controlling an electromagnetic valve of the oil pump to adjust the oil pressure of the main oil gallery according to the water temperature, the engine speed and the engine load;
and the control module is used for controlling the piston cooling nozzle according to the oil pressure of the main oil gallery.
For specific definition of the piston cooling nozzle control device, reference may be made to the above definition of the piston cooling nozzle control method, which is not described in detail herein. The various modules in the piston cooling nozzle control apparatus described above may be implemented in whole or in part by software, hardware, and combinations thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
As shown in fig. 6, an embodiment of the present invention further provides a piston cooling nozzle control device, which may be an ECU and deployed in a vehicle, and the piston cooling nozzle control device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the steps of the piston cooling nozzle control method according to any one of claims 1 to 6 when executing the computer program.
In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored, which computer program, when being executed by a processor, is adapted to carry out the above-mentioned piston cooling nozzle control method.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory or other media used in the embodiments provided herein may include non-volatile and/or volatile memory. Non-volatile memory can include read-only memory (ROM), Programmable ROM (PROM), Electrically Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), Rambus Direct RAM (RDRAM), direct bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. A piston cooling nozzle control method for use in a piston cooling nozzle control system including an engine, an oil pump solenoid valve, and at least one piston cooling nozzle, the method comprising:
obtaining engine operating parameters, wherein the engine operating parameters comprise water temperature of an engine, engine rotating speed and engine load;
controlling the oil pump electromagnetic valve to adjust the oil pressure of a main oil gallery according to the water temperature, the engine speed and the engine load;
and controlling the piston cooling nozzle according to the oil pressure of the main oil gallery.
2. The piston cooling nozzle control method as described in claim 1, wherein said piston cooling nozzle control system includes a first cooling nozzle and a second cooling nozzle, said controlling said piston cooling nozzle in accordance with said main gallery oil pressure comprises:
when the oil pressure of the main oil gallery is smaller than a first oil pressure, controlling the first cooling nozzle and the second cooling nozzle to be closed;
when the oil pressure of the main oil gallery is greater than or equal to a first oil pressure and less than a second oil pressure, controlling the first cooling nozzle to be opened and controlling the second cooling nozzle to be closed;
and when the oil pressure of the main oil gallery is greater than or equal to the second oil pressure, controlling the first cooling nozzle and the second cooling nozzle to be opened.
3. The piston cooling nozzle control method of claim 2 wherein said controlling said oil pump solenoid valve to adjust said main gallery oil pressure based on said water temperature, said engine speed, and said engine load comprises:
when the water temperature is lower than a preset temperature, controlling the oil pump electromagnetic valve to adjust the oil pressure of the main oil gallery according to the engine speed, the engine load and a first preset lookup table;
and when the water temperature is greater than or equal to the preset temperature, controlling the oil pump electromagnetic valve to adjust the oil pressure of the main oil gallery according to the engine speed, the engine load and a second preset lookup table.
4. The piston cooling nozzle control method of claim 3 wherein said controlling said oil pump solenoid valve to regulate said main gallery oil pressure based on said engine speed, said engine load, and a second predetermined look-up table comprises:
when the engine speed is greater than or equal to a preset speed and the engine load is greater than or equal to a preset load, controlling the oil pump electromagnetic valve to adjust the oil pressure of the main oil gallery according to the engine speed, the engine load and the second preset lookup table;
and when the rotating speed of the engine is continuously less than a preset rotating speed and the load of the engine is continuously less than a preset load, after delaying a preset time, controlling the electromagnetic valve of the oil pump to regulate the oil pressure of the main oil gallery according to the rotating speed of the engine, the load of the engine and the second preset lookup table.
5. The piston cooling nozzle control method of claim 4 wherein said second predetermined look-up table includes an engine speed value, an engine load value and a main gallery oil pressure value, the engine speed value, the engine load value and the main gallery oil pressure value corresponding, and said controlling said oil pump solenoid valve to adjust said main gallery oil pressure in accordance with the second predetermined look-up table includes:
inquiring a corresponding main oil gallery oil pressure value from the second preset inquiry table according to the engine speed and the engine load;
and controlling the oil pump electromagnetic valve according to the corresponding main oil gallery oil pressure value to adjust the main oil gallery oil pressure.
6. The piston cooling nozzle control method as in any one of claims 1-5, wherein after said obtaining engine operating parameters, said method further comprises:
judging whether a water temperature sensor of the engine fails or not;
when the water temperature sensor fails, switching to a high-pressure mode to control the oil pump electromagnetic valve to adjust the main oil gallery oil pressure to the maximum main oil gallery oil pressure;
and opening the piston cooling nozzle according to the maximum main oil gallery oil pressure.
7. A piston cooling nozzle control apparatus for use in a piston cooling nozzle control system including an engine, an oil pump solenoid valve, and at least one piston cooling nozzle, the apparatus comprising:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring engine operating parameters, and the engine operating parameters comprise the water temperature of an engine, the engine rotating speed and the engine load;
the adjusting module is used for controlling the oil pump electromagnetic valve to adjust the oil pressure of the main oil gallery according to the water temperature, the engine speed and the engine load;
and the control module is used for controlling the piston cooling nozzle according to the oil pressure of the main oil gallery.
8. A piston cooling nozzle control apparatus comprising a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor when executing the computer program implements the steps of a piston cooling nozzle control method according to any one of claims 1 to 6.
9. A piston cooling spray nozzle control system, characterized in that the piston cooling spray nozzle control system comprises an engine, an oil pump solenoid valve, a piston cooling spray nozzle control device according to claim 8 and at least one piston cooling spray nozzle.
10. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the piston cooling nozzle control method according to any one of claims 1 to 6.
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| CN115234356A (en) * | 2022-08-19 | 2022-10-25 | 潍柴动力股份有限公司 | Electric control piston cooling nozzle and control method |
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Application publication date: 20210817 |