CN114738074A - Control method and device for variable-flow engine oil pump, vehicle and storage medium - Google Patents
Control method and device for variable-flow engine oil pump, vehicle and storage medium Download PDFInfo
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- CN114738074A CN114738074A CN202210505804.1A CN202210505804A CN114738074A CN 114738074 A CN114738074 A CN 114738074A CN 202210505804 A CN202210505804 A CN 202210505804A CN 114738074 A CN114738074 A CN 114738074A
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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
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
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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
- F01M1/02—Pressure lubrication using lubricating pumps
- F01M2001/0207—Pressure lubrication using lubricating pumps characterised by the type of pump
- F01M2001/0246—Adjustable pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/1002—Output torque
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/101—Engine speed
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention relates to the technical field of vehicles, and particularly discloses a control method and a control device of a variable flow engine oil pump, a vehicle and a storage medium, wherein the control method of the variable flow engine oil pump obtains the rotating speed and the torque of an engine; determining a target oil pressure based on the rotational speed and the torque; obtaining the temperature of engine oil; determining a target opening degree of a variable flow oil pump based on the target oil pressure and the oil temperature; the influence of temperature factors on the opening degree of the variable-flow oil pump is considered, the value of the target opening degree can be ensured to have higher precision, and then the variable-flow oil pump operates at the target opening degree; acquiring actual engine oil pressure; correcting the target opening degree based on the actual oil pressure and the target oil pressure so that the actual oil pressure is equal to the target oil pressure. Because the target opening degree has higher precision, only a small amount of correction is needed during correction, the large fluctuation of the engine oil pressure can be avoided, and the engine is protected.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a control method and device of a variable-flow engine oil pump, a vehicle and a storage medium.
Background
The variable-displacement oil pump control system can continuously change the pump oil amount of the oil pump according to the requirements of various parts of an engine on the oil pressure under the conditions of different rotating speeds, temperatures, loads and the like, so that the control is more precise, the complete distribution as required is realized, the pump oil loss of the traditional fixed-displacement oil pump in the full rotating speed range is avoided, and the friction and the oil consumption can be effectively reduced.
In the prior art, an oil pressure sensor is generally arranged on a main oil duct of an engine for controlling the displacement of a variable displacement oil pump, target oil pressure is preset in an Electronic Control Unit (ECU), when the deviation between the main oil duct oil pressure monitored by the main oil duct pressure sensor and the preset target oil pressure of the ECU exceeds a certain limit value, the displacement of the oil pump is controlled by adjusting the duty ratio of the oil pump, and the oil pressure of the main oil duct of the engine is controlled in a closed loop manner to reach the target pressure. However, this control method does not consider the influence of temperature on the engine oil, for example, when the engine is in a cold start state, the engine oil temperature is too low, which easily causes large fluctuation of the engine oil pressure, and the engine is suddenly stopped due to the engine oil pressure exceeding the limit value, which may cause a certain harm to the engine.
Disclosure of Invention
The invention aims to: the control method, the control device, the vehicle and the storage medium of the variable-displacement oil pump are provided to solve the problem that the influence of temperature on the oil pressure fluctuation is not considered when the displacement of the variable-displacement oil pump is controlled in the related art.
The invention provides a control method of a variable flow engine oil pump, which comprises the following steps:
acquiring the rotating speed and the torque of an engine;
determining a target oil pressure based on the rotational speed and the torque;
obtaining the temperature of engine oil;
determining a target opening degree of a variable flow oil pump based on the target oil pressure and the oil temperature;
the variable flow oil pump runs at a target opening degree;
acquiring actual engine oil pressure;
correcting the target opening degree based on the actual oil pressure and the target oil pressure so that the actual oil pressure is equal to the target oil pressure.
As a preferable aspect of the control method of the variable flow rate oil pump, determining the target oil pressure based on the rotation speed and the torque includes:
obtaining a relation graph of the rotating speed, the torque and the target engine oil pressure;
and inquiring corresponding target engine oil pressure from the relation graph based on the rotating speed and the torque.
As a preferable aspect of the control method for the variable flow rate oil pump, determining the target opening degree of the variable flow rate oil pump based on the target oil pressure and the oil temperature includes:
acquiring the incidence relation among target engine oil pressure, engine oil temperature and target opening;
and determining the target opening according to the target engine oil pressure, the engine oil temperature and the incidence relation.
As a preferable aspect of the control method of the variable flow rate oil pump, the correcting the target opening degree based on the actual oil pressure and the target oil pressure so that the actual oil pressure becomes equal to the target oil pressure includes:
circularly comparing the actual oil pressure with the target oil pressure;
if the actual engine oil pressure is larger than the engine oil pressure of the marking machine, updating the value of the target opening to a value obtained by reducing a first set value on the basis of the target opening;
if the actual engine oil pressure is smaller than the engine oil pressure of the marking machine, updating the value of the target opening to a value obtained by adding a second set value on the basis of the target opening;
and if the actual engine oil pressure is equal to the engine oil pressure, keeping the value of the target opening unchanged.
The invention also provides a control device of the variable flow oil pump, which comprises the following components:
the parameter acquisition module is used for acquiring the rotating speed and the torque of the engine;
a target oil pressure determination module for determining a target oil pressure based on the rotational speed and the torque;
the engine oil temperature acquisition unit is used for acquiring the engine oil temperature;
a target opening determination module for determining a target opening of a variable flow oil pump based on the target oil pressure and the oil temperature;
an execution unit configured to cause the variable-flow oil pump to operate at a target opening degree;
a pressure acquisition unit for acquiring an actual oil pressure;
and the correction module is used for correcting the target opening based on the actual oil pressure and the target oil pressure so that the actual oil pressure is equal to the target oil pressure.
As a preferable aspect of the control device for the variable flow rate oil pump, the target oil pressure determination module includes:
the relation graph acquiring unit is used for acquiring a relation graph of the rotating speed, the torque and the target oil pressure;
and the query unit is used for querying the corresponding target oil pressure from the relation graph based on the rotating speed and the torque.
As a preferable technical solution of the control device for the variable-flow oil pump, the target opening degree determination module includes:
the incidence relation acquisition unit is used for acquiring the incidence relation among the target oil pressure, the oil temperature and the target opening;
and the target opening determining unit is used for determining the target opening according to the target oil pressure, the oil temperature and the incidence relation.
As a preferable technical solution of the control device for the variable flow rate oil pump, the correction module includes:
the circulation comparison unit is used for comparing the actual engine oil pressure with the target engine oil pressure;
the first updating unit is used for updating the value of the target opening to a value obtained by reducing a first set value on the basis of the target opening when the actual oil pressure is greater than the oil pressure of the marking machine;
the second updating unit is used for updating the value of the target opening to a value obtained by adding a second set value on the basis of the target opening when the actual engine oil pressure is smaller than the engine oil pressure of the marking machine;
and the holding unit is used for keeping the value of the target opening unchanged when the actual engine oil pressure is equal to the standard engine oil pressure.
The invention also provides a vehicle, which comprises an engine and a variable flow oil pump, and also comprises:
a driving controller;
the rotating speed sensor is used for detecting the rotating speed of the engine and sending the rotating speed to the driving controller;
the torque sensor is used for detecting the torque of the engine and sending the torque to the driving controller;
the temperature sensor is used for detecting the temperature of the engine oil and sending the temperature of the engine oil to the driving controller;
the pressure sensor is used for detecting the actual oil pressure of the engine oil and sending the actual oil pressure to the driving controller;
a memory for storing one or more programs;
when the one or more programs are executed by the traveling controller, the traveling controller controls the vehicle to implement the control method of the variable flow oil pump as in any one of the above aspects.
The present invention also provides a storage medium having stored thereon a computer program which, when executed by a vehicle controller, implements a method of controlling a variable flow rate oil pump as set forth in any of the above aspects.
The invention has the beneficial effects that:
the invention provides a control method, a control device, a vehicle and a storage medium of a variable flow engine oil pump, wherein the control method of the variable flow engine oil pump obtains the rotating speed and the torque of an engine; determining a target oil pressure based on the rotational speed and the torque; obtaining the temperature of engine oil; determining a target opening degree of a variable flow oil pump based on the target oil pressure and the oil temperature; the variable flow oil pump operates at a target opening degree; acquiring actual engine oil pressure; correcting the target opening degree based on the actual oil pressure and the target oil pressure so that the actual oil pressure is equal to the target oil pressure. The influence of temperature factors on the opening of the variable flow oil pump is fully considered when the target opening is determined, so that the determined target opening of the variable flow oil pump can be ensured to have higher precision, and when the target opening of the variable flow oil pump is corrected, only a small amount of correction is needed, the large fluctuation of the oil pressure can be avoided, and the engine is protected.
Drawings
FIG. 1 is a first flowchart illustrating a method for controlling a variable displacement oil pump according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a second method for controlling the variable flow pump according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a control device of a variable-flow oil pump according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a vehicle in the embodiment of the invention.
In the figure:
300. a parameter acquisition module; 310. a target oil pressure determination module; 320. an engine oil temperature acquisition unit; 330. a target opening degree determination module; 340. an execution unit; 350. a pressure acquisition unit; 360. a correction module;
400. an engine; 410. a variable flow oil pump; 420. a vehicle controller; 430. a rotational speed sensor; 440. a torque sensor; 450. a temperature sensor; 460. a pressure sensor; 470. a memory.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Where the terms "first position" and "second position" are two different positions, and where a first feature is "over", "above" and "on" a second feature, it is intended that the first feature is directly over and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention and are not to be construed as limiting the present invention.
Example one
In the prior art, an engine oil pressure sensor is generally arranged on a main oil duct of an engine for controlling the displacement of a variable displacement engine oil pump, target engine oil pressure is preset in an ECU (electronic control unit), when the deviation between the main oil duct oil pressure monitored by the main oil duct pressure sensor and the target oil pressure preset by the ECU exceeds a certain limit value, the displacement of the engine oil pump is controlled by adjusting the duty ratio of the engine oil pump, and the main oil duct oil pressure of the engine is controlled in a closed loop manner to reach the target pressure. However, this control method does not consider the influence of temperature on the engine oil, for example, when the engine is in a cold start state, the engine oil temperature is too low, which easily causes large fluctuation of the engine oil pressure, and the engine is suddenly stopped due to the engine oil pressure exceeding the limit value, which may cause a certain damage to the engine.
Therefore, the embodiment provides a control method of a variable flow engine oil pump, which fully considers the influence of temperature factors on engine oil pressure, avoids pressure fluctuation and can ensure the adjustment precision. The control method of the variable flow rate oil pump may be implemented by a control device of the variable flow rate oil pump, which may be implemented in software and/or hardware, and integrated in a vehicle, and specifically, as shown in fig. 1, the control method of the variable flow rate oil pump includes the following steps.
S100: the rotational speed and torque of the engine are obtained.
The rotational speed of the engine may be detected by a rotational speed sensor, and the torque output by the engine may be detected by a torque sensor.
S110: a target oil pressure is determined based on the speed and torque.
Under different working conditions of the engine, different oil pressures need to be matched, so that all parts in the engine can be fully lubricated. The different working conditions of the engine can be displayed through the rotating speed of the engine and the torque of the engine, and further the oil pressure of the lower target machine can be determined according to a preset relation graph or a preset incidence relation.
S120: and acquiring the temperature of the engine oil.
The oil temperature of the oil may be detected by the temperature sensor.
S130: a target opening degree of the variable flow oil pump is determined based on the target oil pressure and the oil temperature.
The viscosity of the engine oil is different at different engine oil temperatures, for example, the viscosity of the engine oil is higher at a low temperature, the oil resistance of the engine oil is larger, the viscosity of the engine oil is smaller at a high temperature, and the oil resistance of the engine oil is smaller, so that the target opening degree of the variable flow rate engine oil pump is different at different temperatures under the conditions of a certain engine oil pressure and a certain engine oil amount required by an engine. Therefore, the target opening of the variable flow oil pump is determined through the target oil pressure and the oil temperature, the influence of the temperature factor on the oil supply of the engine can be fully considered, and the target opening of the variable flow oil pump is ensured to have higher accuracy.
S140: the variable-flow oil pump operates at a target opening degree.
S150: and acquiring actual oil pressure.
S160: the target opening degree is corrected based on the actual oil pressure and the target oil pressure so that the actual oil pressure becomes equal to the target oil pressure.
It is understood that when the variable-flow-rate oil pump is operated at the target opening degree, the actual oil pressure of the oil may differ from the target oil pressure by a small amount even if there is a difference, and further, in order to make the actual oil pressure equal to the target oil pressure, the amount of correcting the target opening degree is small, thereby preventing the oil pressure from fluctuating widely and protecting the engine.
According to the control method of the variable flow engine oil pump provided by the embodiment, the rotating speed and the torque of an engine are obtained; determining a target oil pressure based on the rotational speed and the torque; obtaining the temperature of engine oil; determining a target opening degree of a variable flow oil pump based on the target oil pressure and the oil temperature; the variable flow oil pump operates at a target opening degree; acquiring actual engine oil pressure; correcting the target opening degree based on the actual oil pressure and the target oil pressure so that the actual oil pressure is equal to the target oil pressure. The influence of temperature factors on the opening of the variable flow oil pump is fully considered when the target opening is determined, so that the determined target opening of the variable flow oil pump can be ensured to have higher precision, and when the target opening of the variable flow oil pump is corrected, only a small amount of correction is needed, the large fluctuation of the oil pressure can be avoided, and the engine is protected.
Example two
As shown in fig. 2, the present embodiment provides a control method of a variable flow rate oil pump, which is embodied on the basis of the above-described embodiments, and includes the following steps.
S200: the rotational speed and torque of the engine are obtained.
S210: a target oil pressure is determined based on the speed and torque.
Specifically, determining the target oil pressure based on the rotation speed and the torque in the present embodiment includes the following steps S211 and S212.
S211: and obtaining a relation graph of the rotating speed, the torque and the target oil pressure.
The relation graph of the rotating speed, the torque and the target engine oil pressure can be obtained through a large number of experiments in the early stage and is prestored in the driving controller.
S212: and inquiring corresponding target engine oil pressure from the relation graph based on the rotating speed and the torque.
S220: and obtaining the temperature of the engine oil.
S230: a target opening degree of the variable flow oil pump is determined based on the target oil pressure and the oil temperature.
Specifically, determining the target opening degree of the variable flow rate oil pump based on the target oil pressure and the oil temperature in the present embodiment includes the following steps S231 and S232.
S231: and acquiring the incidence relation among the target oil pressure, the oil temperature and the target opening.
The correlation among the target engine oil pressure, the engine oil temperature and the target opening degree can be obtained through a large number of experiments in the early stage and is prestored in the driving controller.
S232: and determining the target opening according to the target oil pressure, the oil temperature and the incidence relation.
According to the obtained target oil pressure and oil temperature, the corresponding target opening degree can be inquired from the association relation.
S240: the variable-flow oil pump operates at a target opening degree.
S250: and acquiring actual oil pressure.
S260: the target opening degree is corrected based on the actual oil pressure and the target oil pressure so that the actual oil pressure becomes equal to the target oil pressure.
Correcting the target opening degree based on the actual oil pressure and the target oil pressure so that the actual oil pressure is equal to the target oil pressure includes:
s261: comparing the actual oil pressure with the target oil pressure;
if the actual oil pressure is greater than the marking machine oil pressure, executing S262; if the actual oil pressure is less than the label machine oil pressure, executing S263; if the actual oil pressure is equal to the target oil pressure, S264 is executed.
S262: the value of the target opening degree is updated to a value obtained by reducing the first set value on the basis of the target opening degree.
S263: the value of the target opening degree is updated to a value obtained by adding a second set value to the target opening degree.
S264: the value of the target opening degree remains unchanged.
Wherein, first set point and second set point all can set up as required. It should be noted that, the actual oil pressure is equal to the target oil pressure in this embodiment, which means that the value of the actual oil pressure is completely equal to the value of the target oil pressure, or the ratio of the value of the actual oil pressure to the value of the target oil pressure is within a set range, which is small, for example, the set range may be 0.995-1.005.
After steps S262, S263, and S264, S261 is repeatedly executed, so that PID adjustment of the target opening degree can be achieved.
In other embodiments, step S260 may further include the following steps:
obtaining map of actual engine oil pressure, target engine oil pressure and target opening;
and inquiring the corresponding target opening from the map based on the actual oil pressure and the target oil pressure, and replacing the original target opening with the inquired target opening. This would eliminate the need for repeated cycling, but would have a relatively poor control accuracy compared to PID control.
In the method for controlling a variable flow rate oil pump according to the second embodiment of the present invention, based on the above-described embodiment, the corresponding target oil pressure is searched from the map based on the rotation speed and the torque, and the target opening degree is determined based on the target oil pressure, the oil temperature, and the correlation. And PID adjustment is carried out on the target opening degree based on the actual engine oil pressure and the target engine oil pressure, so that the actual engine oil pressure is equal to the target engine oil pressure, and the method is simple, reliable and low in cost.
EXAMPLE III
As shown in fig. 3, the present embodiment provides a control device of a variable flow rate oil pump, which is used for executing the control method of the variable flow rate oil pump, and specifically, the control device of the variable flow rate oil pump includes a parameter acquisition module 300, a target oil pressure determination module 310, an oil temperature acquisition unit 320, a target opening degree determination module 330, an execution unit 340, a pressure acquisition unit 350, and a correction module 360.
The parameter obtaining module 300 is used for obtaining the rotating speed and the torque of the engine; the target oil pressure determination module 310 is to determine a target oil pressure based on the rotational speed and the torque; the engine oil temperature acquisition unit 320 is configured to acquire an engine oil temperature; the target opening determination module 330 is configured to determine a target opening of the variable flow oil pump based on the target oil pressure and the oil temperature; the execution unit 340 is configured to operate the variable flow oil pump at a target opening degree; the pressure acquisition unit 350 is used to acquire actual oil pressure; the correction module 360 is configured to correct the target opening based on the actual oil pressure and the target oil pressure such that the actual oil pressure is equal to the target oil pressure.
Specifically, the target oil pressure determination module 310 includes a relational map acquisition unit and a query unit. The relation graph acquiring unit is used for acquiring a relation graph of the rotating speed, the torque and the target oil pressure; the query unit is used for querying the corresponding target oil pressure from the relational graph based on the rotating speed and the torque.
The target opening determination module 330 includes an association relationship acquisition unit and a target opening determination unit. The incidence relation acquisition unit is used for acquiring the incidence relation among the target oil pressure, the oil temperature and the target opening; the target opening determining unit is used for determining a target opening according to the target oil pressure, the oil temperature and the incidence relation.
The modification module 360 includes a loop comparison unit, a first update unit, a second update unit, and a holding unit. The circulation comparison unit is used for comparing the actual oil pressure with the target oil pressure; when the actual oil pressure is greater than the oil pressure of the marking machine, the first updating unit is used for updating the value of the target opening to a value which is reduced by a first set value on the basis of the target opening; when the actual engine oil pressure is lower than the engine oil pressure of the marking machine, the second updating unit is used for updating the value of the target opening to a value obtained by adding a second set value on the basis of the target opening; the holding unit is configured to hold the value of the target opening constant when the actual oil pressure is equal to the target oil pressure.
In the control device of the variable flow oil pump provided by the embodiment, the parameter obtaining module 300 obtains the rotation speed and the torque of the engine; determining, by the target oil pressure determination module 310, a target oil pressure based on the rotational speed and the torque; acquiring the oil temperature through the oil temperature acquisition unit 320; determining, by the target opening determination module 330, a target opening for the variable flow oil pump based on the target oil pressure and the oil temperature; operating the variable flow oil pump at the target opening degree through the execution unit 340; acquiring actual oil pressure by the pressure acquisition unit 350; the target opening is corrected by the correction module 360 based on the actual oil pressure and the target oil pressure to make the actual oil pressure equal to the target oil pressure. When the target opening degree is determined, the influence of the temperature factor on the opening degree of the variable flow oil pump is fully considered, so that the determined target opening degree of the variable flow oil pump can be ensured to have higher precision, when the target opening degree of the variable flow oil pump is corrected, only a small amount of correction is needed, the large fluctuation of the oil pressure can be avoided, and the engine is protected.
Example four
As shown in fig. 4, the present embodiment provides a vehicle, specifically, the vehicle includes an engine 400 and a variable flow rate oil pump 410, and further includes a running controller 420, a rotation speed sensor 430, a torque sensor 440, a temperature sensor 450, a pressure sensor 460, and a memory 470. The engine 400, the variable-flow oil pump 410, the traveling controller 420, the rotation speed sensor 430, the torque sensor 440, the temperature sensor 450, the pressure sensor 460, and the memory 470 may be connected by a bus. The rotation speed sensor 430 is configured to detect a rotation speed of the engine 400 and transmit the rotation speed to the driving controller 420; the torque sensor 440 is used for detecting the torque of the engine 400 and transmitting the torque to the driving controller 420; the temperature sensor 450 is used for detecting the temperature of the engine oil and sending the temperature of the engine oil to the driving controller 420; the pressure sensor 460 is used to detect the actual oil pressure of the oil and send the actual oil pressure to the vehicle controller 420.
The memory 470, which is a computer-readable storage medium, may be used to store software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the control method of the variable flow oil pump in the embodiments of the present invention. The traveling controller executes various functional applications and data processing of the vehicle by running software programs, instructions and modules stored in the memory 470, that is, implements the control method of the variable flow oil pump of the above-described embodiment.
The memory 470 mainly includes a program storage area and a data storage area, wherein the program storage area can store an operating system and an application program required by at least one function; the storage data area may store data created according to the use of the terminal, and the like. Further, memory 470 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, memory 470 may further include memory 470 located remotely from the vehicle controller 420, and these remote memories 470 may be connected to the vehicle over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The vehicle provided by the fourth embodiment of the invention and the control method of the variable flow oil pump provided by the above embodiment belong to the same inventive concept, the technical details which are not described in detail in the present embodiment can be referred to the above embodiment, and the present embodiment has the same beneficial effects of executing the control method of the variable flow oil pump.
EXAMPLE five
The fifth embodiment of the present invention further provides a storage medium, on which a computer program is stored, where the computer program, when executed by a vehicle controller, implements the control method of the variable flow engine oil pump according to the fifth embodiment of the present invention.
Of course, the storage medium containing the computer-executable instructions provided by the embodiments of the present invention is not limited to the operations in the control method of the variable flow rate oil pump described above, and may also perform the related operations in the control method of the variable flow rate oil pump provided by the embodiments of the present invention, and has the corresponding functions and advantages.
From the above description of the embodiments, it is obvious for those skilled in the art that the present invention can be implemented by software and necessary general hardware, and certainly, can also be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which may be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes instructions for enabling a computer device (which may be a robot, a personal computer, a server, or a network device) to execute the method for controlling the variable flow rate oil pump according to the embodiments of the present invention.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A method of controlling a variable flow engine oil pump, comprising:
acquiring the rotating speed and the torque of an engine;
determining a target oil pressure based on the rotational speed and the torque;
obtaining the temperature of engine oil;
determining a target opening degree of a variable flow oil pump based on the target oil pressure and the oil temperature;
the variable flow oil pump operates at a target opening degree;
acquiring actual engine oil pressure;
correcting the target opening degree based on the actual oil pressure and the target oil pressure so that the actual oil pressure is equal to the target oil pressure.
2. The method of controlling a variable flowrate oil pump of claim 1, wherein determining a target oil pressure based on the rotational speed and the torque comprises:
obtaining a relation graph of the rotating speed, the torque and the target oil pressure;
and inquiring corresponding target engine oil pressure from the relation graph based on the rotating speed and the torque.
3. The control method of the variable flow oil pump according to claim 1, wherein determining the target opening degree of the variable flow oil pump based on the target oil pressure and the oil temperature includes:
acquiring the incidence relation among target engine oil pressure, engine oil temperature and target opening;
and determining the target opening according to the target engine oil pressure, the engine oil temperature and the incidence relation.
4. The method of controlling a variable flow pump according to claim 1, wherein correcting the target opening degree based on the actual oil pressure and the target oil pressure so that the actual oil pressure is equal to the target oil pressure comprises:
circularly comparing the actual oil pressure with the target oil pressure;
if the actual engine oil pressure is larger than the engine oil pressure of the marking machine, updating the value of the target opening to a value which is reduced by a first set value on the basis of the target opening;
if the actual engine oil pressure is smaller than the engine oil pressure of the marking machine, updating the value of the target opening to a value obtained by adding a second set value on the basis of the target opening;
and if the actual engine oil pressure is equal to the engine oil pressure, keeping the value of the target opening unchanged.
5. A control device for a variable-flow oil pump, comprising:
the parameter acquisition module is used for acquiring the rotating speed and the torque of the engine;
a target oil pressure determination module to determine a target oil pressure based on the rotational speed and the torque;
the engine oil temperature acquisition unit is used for acquiring the engine oil temperature;
a target opening determination module for determining a target opening of a variable flow oil pump based on the target oil pressure and the oil temperature;
an execution unit configured to cause the variable-flow oil pump to operate at a target opening degree;
a pressure acquisition unit for acquiring an actual oil pressure;
and the correction module is used for correcting the target opening based on the actual oil pressure and the target oil pressure so that the actual oil pressure is equal to the target oil pressure.
6. The control apparatus for the variable flow oil pump according to claim 5, wherein the target oil pressure determination module includes:
the relation graph acquiring unit is used for acquiring a relation graph of the rotating speed, the torque and the target oil pressure;
and the query unit is used for querying the corresponding target oil pressure from the relation graph based on the rotating speed and the torque.
7. The control apparatus of the variable flow oil pump according to claim 5, wherein the target opening degree determination module includes:
the incidence relation acquisition unit is used for acquiring the incidence relation among the target oil pressure, the oil temperature and the target opening;
and the target opening determining unit is used for determining the target opening according to the target oil pressure, the oil temperature and the incidence relation.
8. The control device for the variable-flow oil pump according to claim 5, wherein the correction module includes:
the circulation comparison unit is used for comparing the actual engine oil pressure with the target engine oil pressure;
a first updating unit configured to update the target opening to a value obtained by reducing a first set value on the basis of the target opening when the actual oil pressure is greater than the marker oil pressure;
the second updating unit is used for updating the value of the target opening to a value obtained by adding a second set value on the basis of the target opening when the actual engine oil pressure is smaller than the engine oil pressure of the marking machine;
and the holding unit is used for keeping the value of the target opening unchanged when the actual engine oil pressure is equal to the standard engine oil pressure.
9. A vehicle including an engine and a variable flow oil pump, characterized by further comprising:
a vehicle controller;
the rotating speed sensor is used for detecting the rotating speed of the engine and sending the rotating speed to the travelling crane controller;
the torque sensor is used for detecting the torque of the engine and sending the torque to the driving controller;
the temperature sensor is used for detecting the temperature of the engine oil and sending the temperature of the engine oil to the driving controller;
the pressure sensor is used for detecting the actual oil pressure of the engine oil and sending the actual oil pressure to the driving controller;
a memory for storing one or more programs;
the one or more programs, when executed by the locomotive controller, cause the locomotive controller to control a vehicle to implement the control method of the variable flow oil pump of any of claims 1-4.
10. A storage medium having stored thereon a computer program, characterized in that when the program is executed by a vehicle controller, the vehicle implements the control method of the variable flow rate oil pump according to any one of claims 1 to 4.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210505804.1A CN114738074A (en) | 2022-05-10 | 2022-05-10 | Control method and device for variable-flow engine oil pump, vehicle and storage medium |
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| CN202210505804.1A CN114738074A (en) | 2022-05-10 | 2022-05-10 | Control method and device for variable-flow engine oil pump, vehicle and storage medium |
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