CN111350660B - Engine oil pump control system - Google Patents
Engine oil pump control system Download PDFInfo
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- CN111350660B CN111350660B CN202010169494.1A CN202010169494A CN111350660B CN 111350660 B CN111350660 B CN 111350660B CN 202010169494 A CN202010169494 A CN 202010169494A CN 111350660 B CN111350660 B CN 111350660B
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- oil pump
- oil
- stator
- pressure
- electronic control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
- F04C14/18—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber
- F04C14/22—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members
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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
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/18—Indicating or safety devices
- F01M1/20—Indicating or safety devices concerning lubricant pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
- F04C14/24—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
- F04C14/28—Safety arrangements; Monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/30—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
- F04C2/34—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members
- F04C2/344—Rotary-piston machines or pumps having the characteristics covered by two or more groups F04C2/02, F04C2/08, F04C2/22, F04C2/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in groups F04C2/08 or F04C2/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N13/00—Lubricating-pumps
- F16N13/20—Rotary pumps
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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
- F01M2001/0238—Rotary pumps
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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
- F01M2001/0253—Pressure lubrication using lubricating pumps characterised by the pump driving means
- F01M2001/0269—Pressure lubrication using lubricating pumps characterised by the pump driving means driven by the crankshaft
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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
- F01M2001/0292—Sealings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
The present disclosure provides an oil pump control system, including: the system comprises an oil pump, a flow regulating device, a cylinder pressure sensor and an electronic control unit; the oil pump comprises a pump body, a stator and a rotor; the flow regulating device is connected with a stator of the oil pump; the cylinder pressure sensor is arranged in an engine cylinder and used for collecting pressure signals in the engine cylinder and converting the pressure signals into electric signals; and the electronic control unit receives the electric signal sent by the cylinder pressure sensor, sends the electric signal to the flow regulating device, controls the flow regulating device to move, drives the stator to move horizontally, changes the eccentric distance between the stator and the rotor, and regulates the volume of oil in the oil pump. The change of the displacement of the oil pump is realized by changing the eccentricity of the stator and the rotor, is not limited by the rotating speed of an engine, and avoids the problems of energy waste caused by overhigh oil pressure of the oil pump or insufficient lubrication caused by overlow oil pressure and the like.
Description
Technical Field
The disclosure relates to the field of optimization of lubricating systems of internal combustion engines, in particular to an oil pump control system.
Background
In the technical development of automobiles, the automobile lubrication system still depends on a mechanical oil pump driven by the rotation of an engine crankshaft to supply lubricating oil, the pressure and the flow of the lubricating oil at the outlet of the lubricating oil pump are changed along with the rotating speed of the engine, when the rotating speed of the engine is very high, the oil pressure is too high, energy waste is caused, when the rotating speed of the engine is very low, the oil pressure is too low, the risk of insufficient lubrication exists, and dry friction is easily caused at a bearing and a piston ring. Frequent fluctuation of the outlet pressure and flow of the oil pump can also influence the strength of parts and reduce the service life of the oil pump.
The crank connecting rod mechanism is stressed by tension and compression under high-temperature and high-pressure working conditions in the cylinder, and is also stressed by reciprocating inertia force and side thrust, so that the problems of strength and service life of the crank connecting rod are obvious under complicated and severe stress conditions. In addition, the crank link mechanism is provided with an oil channel, so that when the drill hole is lubricated, the strength of the crank link mechanism is reduced and the stress is increased because the pressure inside and outside the crank link mechanism is unequal and the fluctuation is large.
Disclosure of Invention
Technical problem to be solved
The present disclosure provides an oil pump control system to at least partially solve the technical problems set forth above.
(II) technical scheme
According to an aspect of the present disclosure, there is provided an oil pump control system including:
the oil pump comprises a pump body, a stator and a rotor;
the flow regulating device is connected with a stator of the oil pump;
the cylinder pressure sensor is arranged in an engine cylinder; the cylinder pressure sensor is used for acquiring a pressure signal in an engine cylinder and converting the pressure signal into an electric signal;
the electronic control unit receives an electric signal sent by the cylinder pressure sensor, outputs the electric signal to the flow regulating device, and the flow regulating device moves to drive the stator to move horizontally, so that the eccentricity between the stator and the rotor is changed, and the volume of oil in the oil pump is regulated.
In some embodiments of the present disclosure, the flow regulating device comprises:
the motor is used for providing power for the flow regulating device;
the gear is sleeved on the output shaft of the motor;
a shaft, a first end of the shaft being connected to the stator; and a rack structure is arranged at the second end of the shaft rod and is meshed with the gear.
In some embodiments of the present disclosure, further comprising:
the mounting groove is arranged on the pump body and is positioned at a position where the mounting groove is contacted with the shaft rod;
the sealing structure is sleeved on the shaft rod and arranged in the mounting groove.
In some embodiments of the present disclosure, further comprising:
the lubricating oil channel pressure sensor is arranged at the output end of the engine crankshaft; the lubricating oil channel pressure sensor is used for collecting pressure signals in the lubricating oil channel and converting the pressure signals into electric signals, and the lubricating oil channel pressure sensor sends the electric signals to the electronic control unit.
In some embodiments of the present disclosure, further comprising:
the first electric control element is used for receiving the electric signal of the electronic control unit and controlling the flow regulating device to rotate forwards and output;
and the second electric control element is used for receiving the electric signal of the electronic control unit and controlling the flow regulating device to perform reverse output.
In some embodiments of the present disclosure, further comprising: and the first electric control element and the second electric control element are arranged in the control box.
In some embodiments of the present disclosure, the shaft first end is threadedly connected with the stator.
In some embodiments of the present disclosure, the gear is connected to the output shaft of the motor by a flat key; the motor is a three-phase reversible motor.
In some embodiments of the present disclosure, the electronic control unit is provided with a minimum oil pressure value, wherein the minimum oil pressure value is 0.2-0.3 MPa.
In some embodiments of the present disclosure, the oil pump is a vane-type oil pump.
(III) advantageous effects
According to the technical scheme, the oil pump control system disclosed by the invention has at least one or part of the following beneficial effects:
(1) the variable displacement vane pump driven by the crankshaft is adopted by the oil pump disclosed by the invention, the power consumption of the storage battery is reduced, the power of the storage battery is mainly supplied to a motor and an electric control element, the displacement of the oil pump is changed by changing the eccentricity of a stator and a rotor, the oil pump is not limited by the rotating speed of the engine, and the problems of energy waste caused by overhigh oil pressure and insufficient lubrication caused by overlow oil pressure of the traditional oil pump are solved.
(2) The oil pump displacement of the oil pump is changed along with the pressure of the cylinder, so that the adaptation of the lubricating oil pressure in a lubricating oil channel in a crank connecting rod structure and the gas load in the cylinder can be realized, and the magnitude of resultant force borne by a crank connecting rod mechanism is reduced.
(3) The variable rack structure is adopted to change the eccentricity of the vane type oil pump, the motor is connected with the motor through the gear, the control of the eccentricity is realized, the motor and the oil pump are vertically arranged, the position of the engine cannot move due to the movement of the variable rack structure, the arrangement is compact, the occupied space is reduced, and the requirement of limited space of an automobile is met.
(4) The three-phase reversible motor is adopted in the motor, the change of the wiring phase sequence is realized through two electric control elements, the two electric control elements respectively control the switch of a two-phase circuit, and a control system is simple.
Drawings
Fig. 1 is a schematic diagram of a structure of an electronic oil pump according to an embodiment of the present disclosure.
Fig. 2 is a schematic view of a connection structure of a variable rack and a vane type oil pump stator in the embodiment of the disclosure.
Fig. 3 is a schematic view of a transmission structure of a variable rack and a gear in an embodiment of the disclosure.
FIG. 4 is a schematic view of a sealing structure at a contact position of a variable rack cylindrical section and a pump body of a vane pump in the embodiment of the disclosure.
Fig. 5 is a schematic diagram of a control system of an electronic oil pump according to an embodiment of the disclosure.
[ description of main reference numerals in the drawings ] of the embodiments of the present disclosure
100-oil pump;
110-a stator;
120-a rotor;
130-a pump body;
131-a mounting groove;
132-a sealing structure;
200-a transmission assembly;
210-a shaft;
211-rack configuration;
220-a gear;
230-a motor;
240-flat bond;
300-a control box;
310-a first electrically controlled element;
320-a second electrically controlled element;
400-an electronic control unit;
500-cylinder;
600-cylinder pressure sensor;
700-oil gallery;
800-oil gallery pressure sensor.
Detailed Description
The lubricating system of the automobile engine directly influences the performance parameters and the service life of the engine, and the lubrication and heat dissipation among moving parts are realized by lubricating oil.
The oil pump of the traditional automobile engine adopts a mechanical pump directly driven by an engine crankshaft, and the flow and pressure of the output lubricating oil of the oil pump change along with the rotating speed of the engine, so that the traditional oil pump cannot meet the lubricating requirements of the engine under different loads. The crank connecting rod structure is provided with a pipeline for lubricating oil to flow through, so that cooling and lubrication among an engine bearing, a piston pin, a piston ring and a cylinder are realized, and the strength of the crank connecting rod mechanism is reduced. When the load in the engine cylinder is large, the acting force applied to the outside of the crank connecting rod mechanism is large, and compared with the pressure in the internal lubricating oil channel, the working condition under high load reduces the service life of the engine cylinder; when the piston bears larger side thrust, a lubricating oil film between the piston ring and the cylinder sleeve is easily damaged; bearing load increases under high load, and if the lubrication pressure cannot be increased, boundary friction, or even dry friction, occurs. When the load in the engine cylinder is small, if the engine speed is high at this time, the oil pump still outputs high lubricating oil pressure, which causes the excessive lubricating oil to be heated in the cycle and energy waste. When the rotating speed of the engine is low, the output flow and pressure of the oil pump cannot meet the minimum requirement of lubrication, and dry friction is bound to occur between moving parts, so that the normal working condition between the kinematic pairs is influenced, and the performance and the service life of the engine are reduced. Which is a common problem of conventional mechanical oil pumps.
Having considered load and rotational speed change scheduling problem in the engine cylinder, this disclosure provides an oil pump control system, includes: the system comprises an oil pump, a flow regulating device, a cylinder pressure sensor and an electronic control unit; the oil pump comprises a pump body, a stator and a rotor; the flow regulating device is connected with a stator of the oil pump; the cylinder pressure sensor is arranged in an engine cylinder and used for collecting pressure signals in the engine cylinder and converting the pressure signals into electric signals; and the electronic control unit receives the electric signal sent by the cylinder pressure sensor, sends the electric signal to the flow regulating device, controls the flow regulating device to move, drives the stator to move horizontally, changes the eccentric distance between the stator and the rotor, and regulates the volume of oil in the oil pump. The change of the displacement of the oil pump is realized by changing the eccentricity of the stator and the rotor, is not limited by the rotating speed of an engine, and avoids the problems of energy waste caused by overhigh oil pressure of the oil pump or insufficient lubrication caused by overlow oil pressure and the like.
For the purpose of promoting a better understanding of the objects, aspects and advantages of the present disclosure, reference is made to the following detailed description taken in conjunction with the accompanying drawings.
Certain embodiments of the present disclosure will now be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the disclosure are shown. Indeed, various embodiments of the disclosure may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will satisfy applicable legal requirements.
In a first exemplary embodiment of the present disclosure, an oil pump control system is provided. Fig. 1 is a schematic structural diagram of an oil pump control system according to an embodiment of the present disclosure. As shown in fig. 1, the oil pump control system of the present disclosure includes: the device comprises an oil pump, a flow regulating device, a cylinder pressure sensor, a lubricating oil channel pressure sensor, a first electric control element, a second electric control element and an electronic control unit. The oil pump comprises a pump body, a stator and a rotor. The flow regulating device is connected with a stator of the oil pump. The cylinder pressure sensor is arranged in an engine cylinder and used for collecting pressure signals in the engine cylinder and converting the pressure signals into electric signals. The lubricating oil channel pressure sensor is arranged at the output end of the engine crankshaft; the lubricating oil channel pressure sensor is used for collecting pressure signals in the lubricating oil channel and converting the pressure signals into electric signals, and the lubricating oil channel pressure sensor sends the electric signals to the electronic control unit. And the electronic control unit receives the electric signal sent by the cylinder pressure sensor, sends the electric signal to the flow regulating device, controls the flow regulating device to move, drives the stator to move horizontally, changes the eccentric distance between the stator and the rotor, and regulates the volume of oil in the oil pump.
The invention solves the problems that the lubricating oil pressure of the mechanical oil pump cannot adapt to the change of the gas pressure in the cylinder and the dangers of energy waste and insufficient lubrication caused by overhigh or overlow oil pressure when the rotating speed is changed.
The respective components of the oil pump control system of the present embodiment will be described in detail below.
The oil pump can be a vane type oil pump. The oil pump comprises a pump body, a stator and a rotor. The pump body is provided with a mounting groove at the position where the shaft lever is connected, and the mounting groove is provided with a sealing structure which is sleeved on the shaft lever.
And the flow regulating device is used for regulating the flow in the oil pump. The flow rate adjusting device includes: motors, gears and shafts, described below:
and the motor is used for providing power for the flow regulating device.
And the gear is sleeved on the output shaft of the motor. Specifically, the gear is connected with the output shaft of the motor through a flat key.
And the first end of the shaft rod is connected with the stator threads. The second end of the shaft rod extends out of the pump body, a rack structure is arranged at the second end of the shaft rod, and the rack structure is meshed with the gear.
The first electric control element can be a forward rotation relay. The first electric control element receives an electric signal of the electronic control unit, and the first electric control element is used for controlling the flow regulating device to rotate forwards and output.
The second electric control element can be a reverse relay. And the second electric control element receives the electric signal of the electronic control unit and is used for controlling the flow regulating device to perform reverse output.
The electronic control unit consists of microprocessor, memory, I/O interface, A/D converter, shaping, driving and other large scale integrated circuits, and is special microcomputer controller for automobile. The electronic control unit is provided with a lowest lubricating oil pressure value, wherein the lowest lubricating oil pressure value is the lowest lubricating oil pressure value required for maintaining a lubricating oil film between the kinematic pairs of the engine and is generally 0.2-0.3 MPa.
The invention is further described in detail below with reference to the accompanying drawings.
Referring to fig. 1, an oil pump control system according to an embodiment of the present invention includes a vane-type oil pump, a motor, and a first electronic control element and a second electronic control element for receiving a start-stop signal and a steering signal of the motor.
As shown in fig. 1, the oil pump 100 preferably employs a variable displacement vane pump, the position of the stator 110 can be moved laterally, and the rotor 120 can be rotated while maintaining the position, so that the eccentricity between the stator 110 and the rotor 120 can be varied, and when the eccentricity is varied, the volume change of oil between the vanes in the oil pump 100 is varied, thereby varying the displacement. The motor 230 is preferably a three-phase reversible motor, the direction of rotation of the motor 230 is changed by changing the wiring of any two phases, and the switches of the two phase sequences are controlled by the first electronic control element 310 and the second electronic control element 320 respectively.
As shown in fig. 1 and 2, the stator 110 is connected to one end of the shaft 210 through a screw, the shaft 210 drives the stator 110 to move laterally, the other end of the shaft 210 extends out of the pump body 130, a portion of the shaft 210 moving in the pump body 130 is a cylindrical structure, and a portion of the other end of the shaft 210 extending out of the pump body is provided with a rack structure 211.
As shown in fig. 1 and 3, a gear 220 is connected to an output shaft of the motor 230, and is connected thereto by a flat key 240.
As shown in fig. 3, a gear-rack mechanism is used for transmission between the gear 220 and the rack structure 211, so that the rotary motion of the motor 230 is converted into the transverse reciprocating motion of the rack structure 211. The oil pump 100 and the motor 230 are vertically arranged, and the transverse movement of the rack structure 211 does not influence the position of the motor 230.
As shown in fig. 4, the oil is sealed by using a sealing structure 132 at the contact position of the shaft 210 and the pump body 130. The sealing structure 132 may be an O-ring. Two O-ring seals realize reliable double-layer sealing, and a mounting groove 131 is processed on the pump body 130 for fixing the sealing structure 132.
As shown in fig. 1, the first electronic control component 310 and the second electronic control component 320 are installed and fixed in the control box 300.
According to the oil pump control system provided by the invention, the oil pump 100 can be used in combination with the cylinder pressure sensor 600, the lubricating oil channel pressure sensor 800 and the electronic control unit 400 to pump oil for an automobile engine lubricating system. When the pressure in the cylinder increases, the electronic control unit 400 receives the pressure signal of the cylinder 500 sent by the cylinder pressure sensor 600, and then outputs an electrical signal to the first electronic control element 310 of the motor 230, so that the motor 230 is powered on to rotate forward, and the gear 220 is driven to rotate forward. The gear 220 drives the rack structure 211 to move rightwards through the gear-rack transmission mechanism, and simultaneously drives the stator 110 to move rightwards, so that the eccentricity between the stator 110 and the rotor 120 is increased, and the increase of the displacement is realized. Since the flow rate of the oil in the crank link mechanism increases, the pressure in the oil passage rises. The pressure in the lubricating oil channel 700 of the crank connecting rod mechanism is partially balanced with the acting force of the gas in the cylinder 500, so that the acting force borne by the crank connecting rod mechanism is reduced; the oil injection amount between the piston ring and the cylinder sleeve is increased, the oil film strength is kept under a larger side thrust force, and dry friction is prevented; the lubricating oil flow at the crank bearing is improved, the full lubrication is ensured, and the complete liquid lubrication is realized.
The pressure of the oil passage 700 is transmitted to the electronic control unit 400 as a feedback pressure, and when the pressure of the oil passage 700 reaches a required value of the electronic control unit 400, the electronic control unit 400 controls the first electronic control element 310 to be powered off, the motor 230 stops operating, and the oil pump 100 operates at a predetermined displacement.
When the pressure in the cylinder 500 decreases, the electronic control unit 400 outputs an electric signal to the second electric control element 320 of the electric motor 230, and the electric motor 230 is energized in reverse. The rack structure 211 moves leftwards to drive the stator 110 to move leftwards, the eccentricity between the stator 110 and the rotor 120 is reduced, and the reduction of the displacement is realized. Thereby avoiding waste of energy.
The Electronic Control Unit (ECU)400 is internally provided with the lowest lubricant passage pressure, and when the engine speed is reduced to a value that cannot meet the minimum requirement of lubrication, the electronic control unit 400 controls the first electric control element 310 to be electrified, the motor 230 rotates forward, the displacement of the oil pump 100 is increased, and the supply amount of lubricant is increased.
Referring to fig. 5, the hydraulic crank mechanism further comprises an air cylinder pressure sensor 600, an electronic control unit 400 and a lubricating oil channel pressure sensor 800, so that the displacement of the oil pump 100 is controlled by the air cylinder pressure, the pressure in the lubricating oil channel 700 of the crank link mechanism is increased, partial balance with the gas acting force in the air cylinder 500 is realized, the magnitude of resultant force borne by the crank link mechanism is reduced, and the strength and the service life of the crank link mechanism are improved; meanwhile, the oil supply quantity of the bearing, the piston pin and the piston is increased, the strength of a lubricating oil film is improved, the liquid lubrication of the bearing and the piston pin is ensured, and the dry friction between a piston ring and a cylinder sleeve is prevented.
As shown in fig. 5, the cylinder pressure sensor 600 is mounted on a cylinder head of the engine cylinder 500, collects a pressure signal in the engine cylinder 500, and converts the cylinder pressure signal into an electrical signal to transmit to the electronic control unit 400; the oil passage pressure sensor 800 is installed at an output end of the crankshaft, and collects a pressure signal in the oil passage 700 to convert the pressure signal into an electric signal and transmits the electric signal to the electronic control unit 400.
The electronic control unit 400 is composed of a microprocessor, a memory, an input/output interface, an analog-to-digital converter, and a large-scale integrated circuit for shaping, driving, etc., and is a microcomputer controller for an automobile. The electronic control unit 400 can calculate the acting force of the crank link mechanism borne by the engine according to the cylinder pressure signal, further calculate the required lubricating oil pressure, and compare the calculated lubricating oil pressure with the lubricating oil channel pressure sent by the lubricating oil channel pressure sensor 800, if the former is greater than the latter, the electronic control unit 400 controls the first electric control element 310 to be electrified, the oil pump 100 increases the discharge capacity, and the discharge capacity of the oil pump is controlled through the cylinder pressure, so that the pressure in the lubricating oil channel 700 of the crank link mechanism is increased, partial balance with the gas acting force in the cylinder 500 is realized, the magnitude of resultant force borne by the crank link mechanism is reduced, and the strength and the service life of the crank link mechanism are improved. Meanwhile, the oil supply quantity of the bearing and the piston is increased, the strength of a lubricating oil film is improved, the liquid lubrication of the bearing is ensured, and the dry friction between a piston ring and a cylinder sleeve is prevented. If the former is larger than the latter, the electronic control unit 400 controls the second electronic control element 320 to be electrified, so that the displacement of the oil pump 100 is reduced, and the waste of energy is avoided. The electronic control unit 400 is provided with a lowest pressure value of the lubricant passage, and when the engine speed is too slow and the pressure in the lubricant passage 700 is low to the lowest pressure value, the electronic control unit 400 controls the first electronic control element 310 to be electrified, so that the displacement of the lubricant pump 100 is increased to meet the lubricating requirement.
So far, the embodiments of the present disclosure have been described in detail with reference to the accompanying drawings. It is to be noted that, in the attached drawings or in the description, the implementation modes not shown or described are all the modes known by the ordinary skilled person in the field of technology, and are not described in detail. Further, the above definitions of the various elements and methods are not limited to the various specific structures, shapes or arrangements of parts mentioned in the examples, which may be easily modified or substituted by those of ordinary skill in the art.
From the above description, those skilled in the art should be clearly aware of the oil pump control system of the present disclosure.
In summary, the present disclosure provides a change of the displacement of the oil pump in the oil pump control system, which is realized by changing the eccentricity of the stator and the rotor, and is not limited by the rotational speed of the engine, thereby avoiding the problems of energy waste caused by too high oil pressure of the oil pump or insufficient lubrication caused by too low oil pressure.
It should also be noted that directional terms, such as "upper", "lower", "front", "rear", "left", "right", and the like, used in the embodiments are only directions referring to the drawings, and are not intended to limit the scope of the present disclosure. Throughout the drawings, like elements are represented by like or similar reference numerals. Conventional structures or constructions will be omitted when they may obscure the understanding of the present disclosure.
And the shapes and sizes of the respective components in the drawings do not reflect actual sizes and proportions, but merely illustrate the contents of the embodiments of the present disclosure. Furthermore, in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim.
Furthermore, the word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements.
The use of ordinal numbers such as "first," "second," "third," etc., in the specification and claims to modify a corresponding element does not by itself connote any ordinal number of the element or any ordering of one element from another or the order of manufacture, and the use of the ordinal numbers is only used to distinguish one element having a certain name from another element having a same name.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the disclosure, various features of the disclosure are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various disclosed aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that is, the claimed disclosure requires more features than are expressly recited in each claim. Rather, as the following claims reflect, disclosed aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this disclosure.
The above-mentioned embodiments are intended to illustrate the objects, aspects and advantages of the present disclosure in further detail, and it should be understood that the above-mentioned embodiments are only illustrative of the present disclosure and are not intended to limit the present disclosure, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.
Claims (7)
1. An oil pump control system comprising:
the oil pump comprises a pump body, a stator and a rotor;
the flow regulating device is connected with a stator of the oil pump; wherein the flow rate adjusting device includes:
the motor is used for providing power for the flow regulating device;
the gear is sleeved on the output shaft of the motor;
a shaft, a first end of the shaft being connected to the stator; a rack structure is arranged at the second end of the shaft rod and is meshed with the gear;
the cylinder pressure sensor is arranged in an engine cylinder; the cylinder pressure sensor is used for acquiring a pressure signal in an engine cylinder and converting the pressure signal into an electric signal;
the electronic control unit receives an electric signal sent by the cylinder pressure sensor, outputs the electric signal to the flow regulating device, and moves to drive the stator to move horizontally, so that the eccentricity between the stator and the rotor is changed, and the volume of oil in the oil pump is regulated;
wherein, still include:
the first electric control element is used for receiving the electric signal of the electronic control unit and controlling the flow regulating device to rotate forwards and output;
the second electric control element is used for receiving the electric signal of the electronic control unit and controlling the flow regulating device to perform reverse output;
the lubricating oil channel pressure sensor is arranged at the output end of the engine crankshaft; the lubricating oil channel pressure sensor is used for acquiring a pressure signal in the lubricating oil channel and converting the pressure signal into an electric signal, and the lubricating oil channel pressure sensor sends the electric signal to the electronic control unit;
comparing the lubricating oil pressure obtained by calculation according to the cylinder pressure signal with the lubricating oil channel pressure sent by the lubricating oil channel pressure sensor; if the former is larger than the latter, the electronic control unit controls the first electric control element to be electrified; if the former is smaller than the latter, the electronic control unit controls the second electric control element to be electrified.
2. The oil pump control system of claim 1, further comprising:
the mounting groove is arranged on the pump body and is positioned at a position where the mounting groove is contacted with the shaft rod;
the sealing structure is sleeved on the shaft rod and arranged in the mounting groove.
3. The oil pump control system of claim 1, further comprising:
and the first electric control element and the second electric control element are arranged in the control box.
4. The oil pump control system of claim 1, wherein the gear is connected to the output shaft of the motor by a flat key; the motor is a three-phase reversible motor.
5. The oil pump control system of claim 1 or 2, wherein the shaft first end is threadedly connected with the stator.
6. An oil pump control system according to any one of claims 1 to 4, wherein the electronic control unit is provided with a minimum oil pressure value, wherein the minimum oil pressure value is 0.2-0.3 MPa.
7. The oil pump control system according to any one of claims 1 to 4, wherein the oil pump is a vane-type oil pump.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010169494.1A CN111350660B (en) | 2020-03-12 | 2020-03-12 | Engine oil pump control system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010169494.1A CN111350660B (en) | 2020-03-12 | 2020-03-12 | Engine oil pump control system |
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| CN111350660B true CN111350660B (en) | 2021-07-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112108668B (en) * | 2020-09-11 | 2022-04-12 | 成都理工大学 | Drilling equipment for machining |
| CN115217577B (en) * | 2021-06-10 | 2023-09-29 | 广州汽车集团股份有限公司 | Curve regulator, curve regulating system and Curve regulating method |
| CN115854009A (en) * | 2021-09-23 | 2023-03-28 | 采埃孚(天津)风电有限公司 | Control device for gear box |
| CN115854008A (en) * | 2021-09-23 | 2023-03-28 | 采埃孚(天津)风电有限公司 | Control device for gear box |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201723442U (en) * | 2010-07-21 | 2011-01-26 | 安徽工程大学 | Variable displacement energy-saving lubricating oil vane pump |
| CN202047981U (en) * | 2011-03-23 | 2011-11-23 | 全兴精工集团有限公司 | Automotive hydraulic power assisted steering pump |
| CN107806352A (en) * | 2016-09-09 | 2018-03-16 | 日立汽车系统(苏州）有限公司 | Maintain the continual and steady system and method for engine oil pressure |
| CN108302036B (en) * | 2017-01-12 | 2021-08-03 | 罗伯特·博世有限公司 | Vane pump and high-pressure fuel pump |
| CN110714917B (en) * | 2019-10-09 | 2021-05-28 | 太原理工大学 | Variable mechanism of single-acting vane pump for continuously and proportionally adjusting flow |
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