CN117905619A - Dual-pressure-variable oil pump oil supply system, control method thereof and vehicle - Google Patents

Abstract

The invention provides a double-variable-pressure oil pump oil supply system, a control method thereof and a vehicle, and relates to the technical field of automobiles. The oil supply system of the double-pressure-variable oil pump comprises: the saddle-shaped oil tank is provided with a first oil chamber and a second oil chamber, and the first oil chamber is communicated with the second oil chamber; the first oil pump assembly is arranged in the first oil chamber; the second oil pump assembly is arranged in the second oil chamber; the first interface of the first valve body is communicated with a first oil outlet pipe orifice of the first oil pump assembly, the second interface of the first valve body is communicated with a second oil outlet pipe orifice of the second oil pump assembly, and the third interface of the first valve body is communicated with a high-pressure oil pump on the engine; and the control unit is electrically connected with the first variable-pressure pump core and the second variable-pressure pump core. In this scheme two vary voltage oil pumps are supplied with oil simultaneously, solves the problem that the noise is great and the single oil pump flow is not enough that causes when the oil pump is with fixed high-power operation simultaneously.

Description

Dual-pressure-variable oil pump oil supply system, control method thereof and vehicle

Technical Field

The invention relates to the technical field of automobiles, in particular to a double-variable-pressure oil pump oil supply system, a control method thereof and a vehicle.

Background

Aiming at super luxury cars matched with V8TD and V12TD engines such as big red flags, the weight of the car body is high (the highest speed can be more than 5 tons), the output torque is required to be more than 800Nm, the acceleration time of one hundred kilometers is less than 4.5s, the maximum instantaneous fuel consumption of the engine is required to be extremely high, the highest speed can be more than 160kg/h, the oil pressure requirement on a low-pressure oil circuit is increased to be more than 5.5bar from the traditional 3-4 bar for preventing cavitation of a high-pressure oil pump, meanwhile, the rated volume of the fuel tank is more than 100L for meeting the range requirement under the high fuel consumption of the super luxury car, the fuel tank is usually arranged below a rear seat, the fuel tank can only be designed into a saddle-shaped fuel tank for avoiding a transmission mechanism and an exhaust muffler of a four-drive or rear drive car type of the luxury car, the fuel tank is divided into a main fuel chamber and an auxiliary fuel chamber, the top of the fuel tank is communicated, the lower part of the fuel tank is separated, the transmission mechanism and the exhaust muffler penetrates through the middle of the fuel tank, and the saddle-shaped fuel tank is equivalent to two independent fuel tanks when the liquid level is lower than the highest point in the middle of the saddle. The oil pump system matched with the traditional saddle-shaped oil tank is generally arranged in a main oil chamber by adopting a fuel pump assembly and is responsible for providing fuel oil for an engine, and simultaneously utilizes a siphon principle to siphon the fuel oil of an auxiliary oil chamber into the main oil chamber, but due to extremely high oil consumption of a large-displacement super-luxury car, a mature single oil pump resource meeting the flow and pressure requirements cannot be found at present.

The prior art provides a double-oil pump oil supply system, a double-constant-pressure oil pump scheme is adopted, namely, the voltage of a supply oil pump is directly provided by a generator, the voltage is always constant at about 13.5V, the oil pump always works at a maximum power point and rotates at full speed, the oil pump supplies oil to an engine at maximum flow and maximum constant pressure, one part of the oil pump is provided for the engine to burn, the requirement of oil consumption under different working conditions of the engine is met, the other part of the redundant flow can flow back into an oil tank, the oil pump always works at the maximum power point, and the two oil pumps always work at the same time, so that the working noise of the two oil pumps which are overlapped together can be very large, when the engine works at a large load, the noise of the engine can be effectively covered, and when the engine works at idle or is at a small load, the noise of the engine can not be effectively covered, the noise of the double-oil pump which works at full speed can be displayed, the noise of the double-oil pump exceeds standard risk, and complaints of users can be generated. In addition, because the two oil pumps always run at full speed under maximum load, the energy consumption is higher, the energy waste can be caused, the oil temperature rise caused by the heat dissipation of the two oil pumps is also faster, especially when the oil quantity in the oil tank is smaller, the oil temperature rise is quicker, the risk of oil circuit air resistance is easy to occur due to the excessively high oil temperature, and the faults such as the acceleration weakness of a vehicle or the flameout of a vehicle can be caused.

Aiming at the technical problems that the noise is larger when the double constant pressure oil pumps supply oil and the flow is insufficient when the single oil pump supplies oil in the prior art, no effective solution is proposed at present.

Disclosure of Invention

The invention mainly aims to provide a double-pressure-variable oil pump oil supply system, a control method thereof and a vehicle, so as to solve the problems of large noise and insufficient flow rate during oil supply of a single oil pump in the prior art.

In order to achieve the above object, according to one aspect of the present invention, there is provided a dual variable pressure oil pump oil supply system comprising: the saddle-shaped oil tank is provided with a first oil chamber and a second oil chamber, and the first oil chamber is communicated with the second oil chamber; the first oil pump assembly is arranged in the first oil chamber and at least comprises a first oil storage barrel and a first variable-pressure pump core arranged in the first oil storage barrel; the second oil pump assembly is arranged in the second oil chamber and comprises a second oil storage barrel and a second variable-pressure pump core arranged in the second oil storage barrel; the first interface of the first valve body is communicated with a first oil outlet pipe orifice of the first oil pump assembly, the second interface of the first valve body is communicated with a second oil outlet pipe orifice of the second oil pump assembly, and the third interface of the first valve body is communicated with a high-pressure oil pump on the engine; the control unit is electrically connected with the first variable-pressure pump core and the second variable-pressure pump core and is used for adjusting the rotating speeds of the first variable-pressure pump core and the second variable-pressure pump core according to the fuel oil demand of the engine.

Further, the dual pressure swing oil pump oil supply system further includes: the first oil pump controller is electrically connected with the first variable-pressure pump core and the control unit and is used for adjusting the rotating speed of the first variable-pressure pump core; the second oil pump controller is electrically connected with the second variable-pressure pump core and the control unit and is used for adjusting the rotating speed of the second variable-pressure pump core; the control unit adjusts the output voltage duty ratio of the first oil pump controller and the second oil pump controller to respectively adjust the rotation speeds of the first variable-pressure pump core and the second variable-pressure pump core.

Further, the dual pressure swing oil pump oil supply system further includes: and the fuel pressure sensor is arranged on a pipeline of the third interface of the first valve body, which is connected with the high-pressure oil pump, and is electrically connected with the control unit.

Further, the first oil pump assembly further includes: the first primary filter screen is arranged in the first oil storage barrel, and the outlet end of the first primary filter screen is communicated with the inlet end of the first variable-pressure pump core; the first fine filter is arranged in the first oil storage barrel, the first fine filter oil inlet end of the first fine filter is communicated with the first variable pressure oil outlet end of the first variable pressure pump core, and the first fine filter oil outlet end of the first fine filter is communicated with a first oil outlet pipe orifice of the first oil pump; the first fine filter is provided with a first pressure regulating valve, and the first pressure regulating valve is used for regulating the oil outlet pressure of the first fine filter.

Further, the second oil pump assembly further includes: the second primary filter screen is arranged in the second oil storage barrel, and the outlet end of the second primary filter screen is communicated with the inlet end of the second variable-pressure pump core; the second fine filter is arranged in the second oil storage barrel, the second fine filter oil inlet end of the second fine filter is communicated with the second variable pressure oil outlet end of the second variable pressure pump core, and the second fine filter oil outlet end of the second fine filter is communicated with the second oil outlet pipe orifice of the second oil pump assembly; the second fine filter is provided with a second pressure regulating valve, and the second pressure regulating valve is used for regulating the oil outlet pressure of the second fine filter.

Further, the dual pressure swing oil pump oil supply system further includes: the first umbrella valve is arranged in the first oil storage barrel; the first interface of the second valve body is communicated with the first driving oil outlet end of the first variable-pressure pump core; the first port of the first siphon is communicated with the second port of the second valve body, the second port of the first siphon is communicated with the first oil storage barrel, and the third port of the first siphon is communicated with the first umbrella valve; the first port of the second siphon is communicated with the third port of the second valve body, the second port of the second siphon is communicated with the first oil storage barrel, and the third port of the second siphon is connected with a second oil suction disc arranged in the second oil chamber; the second umbrella valve is arranged in the second oil storage barrel; the first interface of the third valve body is communicated with the second driving oil outlet end of the second variable-pressure pump core; the first port of the third siphon is communicated with the second port of the third valve body, the second port of the third siphon is communicated with the second oil storage barrel, and the third port of the third siphon is communicated with the second umbrella valve; the first port of the fourth siphon is communicated with the third port of the third valve body, the second port of the fourth siphon is communicated with the second oil storage barrel, and the third port of the fourth siphon is connected with the first oil suction disc arranged in the first oil chamber.

Further, the first oil pump assembly further includes: the first oil inlet umbrella valve is arranged in the first oil storage barrel, the first oil storage barrel is communicated with the first oil chamber through the first oil inlet umbrella valve, and the first oil inlet umbrella valve is used for adjusting the oil quantity entering the first oil storage barrel.

Further, the second oil pump assembly further includes: the second oil inlet umbrella valve is arranged in the second oil storage barrel, the second oil storage barrel is communicated with the second oil chamber through the second oil inlet umbrella valve, and the second oil inlet umbrella valve is used for adjusting the oil quantity entering the second oil storage barrel.

According to another aspect of the present invention, there is provided a vehicle having a dual variable pressure oil pump oil supply system as described above.

According to another aspect of the present invention, there is provided a control method of a dual variable pressure oil pump oil supply system, the method being used for controlling the dual variable pressure oil pump oil supply system, the method comprising the steps of: acquiring engine working condition information and fuel temperature information, wherein the engine working condition information at least comprises engine rotating speed information; determining a fuel demand based on the engine operating condition information and the fuel temperature information, the fuel demand including at least a first demand rotational speed of the first oil pump assembly and a second demand rotational speed of the second oil pump assembly; based on the fuel demand, a control command is generated, the control command being used to control the first variable pressure pump core to operate at a first demand rotational speed and the second oil pump assembly to operate at a second demand rotational speed.

By adopting the technical scheme of the invention, the two variable pressure oil pumps of the first oil pump assembly and the second oil pump assembly are used for supplying oil simultaneously, when the oil consumption requirement of an engine is met, compared with the conventional arrangement scheme of a single oil pump, the working capacity and the power of each oil pump in the embodiment are halved, the flow requirement of the engine can be met by using the fuel pump with conventional flow, the oil supply capacity and the oil supply quantity of an oil supply system are improved, and the rotating speed of the oil pump can be regulated according to actual needs because the oil pump is the variable pressure oil pump, so that the problems of large noise and insufficient flow of the single oil pump caused when the oil pump operates at fixed high power can be solved simultaneously.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

FIG. 1 shows a schematic structural view of an embodiment of a dual pressure swing oil pump oil supply system according to the present invention;

FIG. 2 is a diagram showing a comparison of oil pump noise of a prior art dual constant pressure oil supply system and a dual variable pressure oil pump oil supply system of the present invention;

FIG. 3 shows a comparison of oil pump power of a prior art dual constant pressure oil supply system and a dual variable pressure oil pump oil supply system of the present invention;

FIG. 4 shows a voltage duty cycle versus equivalent voltage for an oil pump assembly of a dual variable pressure oil pump oil supply system according to the present invention;

fig. 5 shows a map of the oil pump pressure versus engine speed, fuel temperature according to the present invention.

Wherein the above figures include the following reference numerals:

1. A first oil pump controller; 2. a first oil pump flange harness joint; 3. a first oil outlet pipe orifice; 4. a first oil pump flange; 5. a first oil pump assembly; 6. a first wire harness; 7. a second valve body; 8. a first pump bundle connector; 9. a first transformer oil outlet end; 10. a first driving oil outlet end; 11. a first variable pressure pump core; 12. a first fine filtration oil outlet end; 13. a first fine filtration oil inlet end; 14. a first fine filter; 15. a first pressure regulating valve; 16. a first oil storage tank; 17. a first siphon tube; 18. a first umbrella valve; 19. a first oil inlet umbrella valve; 20. a first primary screen; 21. a second siphon; 22. a first oil pan;

23. A transmission mechanism; 24. an exhaust muffler;

25. A second oil pan; 26. a second oil storage tank; 27. a fourth siphon tube; 28. a second primary filter screen; 29. a second oil inlet umbrella valve; 30. a second umbrella valve; 31. a third siphon tube; 32. a second pressure regulating valve; 33. a second fine filter; 34. a second fine filtration oil outlet end; 35. a second fine filtration oil inlet end; 36. a second variable pressure pump core; 37. a second pump bundle connector; 38. a second transformer oil outlet end; 39. the second drive oil outlet end; 40. a third valve body; 41. saddle-shaped oil tank; 42. a second wire harness; 43. a second oil pump assembly; 44. a second oil pump flange; 45. a second oil outlet pipe orifice; 46. a second oil pump flange harness joint; 47. a second oil pump controller;

48. a control unit; 49. a first valve body; 50. a fuel pressure sensor; 51. an engine; 52. high pressure oil pump.

Detailed Description

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art, that in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and that identical reference numerals are used to designate identical devices, and thus descriptions thereof will be omitted.

Referring to fig. 1 to 4, according to an embodiment of the present application, a dual variable pressure oil pump oil supply system is provided.

The double-pressure-variable oil pump oil supply system comprises a saddle-shaped oil tank 41, a first oil pump assembly 5, a second oil pump assembly 43, a first valve body 49 and a control unit 48, wherein the saddle-shaped oil tank 41 is provided with a first oil chamber and a second oil chamber, and the first oil chamber is communicated with the second oil chamber; the first oil pump assembly 5 is arranged in the first oil chamber, and the first oil pump assembly 5 at least comprises a first oil storage barrel 16 and a first variable-pressure pump core 11 arranged in the first oil storage barrel 16; the second oil pump assembly 43 is disposed in the second oil chamber, and the second oil pump assembly 43 includes a second oil storage tank 26 and a second variable pressure pump core 36 disposed in the second oil storage tank 26; the first interface of the first valve body 49 is communicated with the first oil outlet pipe orifice 3 of the first oil pump assembly 5, the second interface of the first valve body 49 is communicated with the second oil outlet pipe orifice 45 of the second oil pump assembly 43, and the third interface of the first valve body 49 is communicated with the high-pressure oil pump 52 on the engine 51; the control unit 48 is electrically connected to the first variable-pressure pump core 11 and the second variable-pressure pump core 36, and the control unit 48 is used for adjusting the rotation speeds of the first variable-pressure pump core 11 and the second variable-pressure pump core 36 according to the fuel demand of the engine 51.

By adopting the technical scheme in the above embodiment, through adopting the first oil pump assembly 5 and the second oil pump assembly 43 to supply oil simultaneously, when meeting the engine oil consumption requirement, compare in the conventional setting scheme of single oil pump, the operational capacity and the power of every oil pump in this embodiment all reduce by half, the fuel pump of using conventional flow can satisfy the flow requirement of engine 51, promote oil feeding system's oil feeding capacity and oil supply volume, because the oil pump is the pressure swing oil pump, can adjust the oil pump rotational speed according to actual need, and then can solve the big problem of noise and the problem of single oil pump flow shortage that causes when the oil pump runs with fixed high power simultaneously, when first oil pump assembly 5 and second oil pump assembly 43 are for adopting the complete same pump core, can save the expense of mould development, reduce the work load of demarcation.

It should be noted that, in the preferred embodiment of the present application, the first oil pump assembly 5 and the second oil pump assembly 43 are two identical variable-pressure oil pumps with the same working capacity, and according to actual needs, the first oil pump assembly 5 and the second oil pump assembly 43 may be two variable-pressure oil pumps with a certain difference, so long as the requirements of fuel flow and pressure under different working conditions of the engine 51 can be met.

In the embodiment of the application, the engine 51 is a supercharged direct injection engine, and a high-pressure oil pump 52 on the engine 51 is used to increase the fuel pressure to meet the engine demand.

Further, the dual-pressure-variable oil pump oil supply system further comprises a first oil pump controller 1 and a second oil pump controller 47, the first oil pump controller 1 is electrically connected with the first pressure-variable pump core 11 and the control unit 48, and the first oil pump controller 1 is used for adjusting the rotating speed of the first pressure-variable pump core 11; the second oil pump controller 47 is electrically connected with the second variable-pressure pump core 36 and the control unit 48, and the second oil pump controller 47 is used for adjusting the rotation speed of the second variable-pressure pump core 36; the control unit 48 adjusts the rotation speeds of the first variable-pressure pump core 11 and the second variable-pressure pump core 36 by adjusting the output voltage duty ratios of the first oil pump controller 1 and the second oil pump controller 47, respectively. The oil supply structure is arranged in this way, each oil pump is controlled through the independent oil pump controller, the purpose of independent work between each oil pump can be achieved, the operation flow is simplified, the subsequent maintenance and replacement of parts of a single oil pump are facilitated, meanwhile, the control unit 48 controls the rotation speed of each oil pump through controlling the first oil pump controller 1 and the second oil pump controller 47, the control unit 48 and the first oil pump controller 1 and the second oil pump controller 47 can be controlled to carry out the receiving and sending of instructions through various modes such as wired communication and wireless communication, and the specific control of the oil pump is more flexible. In addition, in this embodiment, by adjusting the rotation speed of the oil pump assembly and the oil pump voltage to meet the oil consumption requirement of the engine 51 under each working condition at each moment, the problem of power waste can be avoided, and the problems of noise, air resistance and the like in the operation process of the oil pump are reduced.

In the preferred embodiment of the present application, the first oil pump controller 1 and the second oil pump controller 47 are identical oil pump controllers, and in combination with the foregoing embodiments, two identical pump cores and two identical oil pump controllers are adopted, so that the fuel consumption requirement of the engine 51 is met, the working capacity and power of a single oil pump and oil pump controller are reduced by half, the fuel pump with conventional flow rate and the low-power oil pump controller can meet the flow rate and control requirement of the engine 51, and the resources of the oil pump and the oil pump controller are controllable.

Preferably, the control unit 48 is an ECU. Further, the dual-pressure-variable oil pump oil supply system further comprises a fuel pressure sensor 50, wherein the fuel pressure sensor 50 is arranged on a pipeline connected with the high-pressure oil pump 52 through a third interface of the first valve body 49, and the fuel pressure sensor 50 is electrically connected with the control unit 48. The actual oil pressure of the high-pressure oil pump 52 can be compared with the oil pressure under the ideal condition, and whether the oil pressure sent to the high-pressure oil pump 52 is consistent with the theoretical oil pressure which is initially set or not can be judged, so that the value of the voltage duty ratio is regulated, the actual oil supply pressure can meet the requirement of the theoretical oil supply pressure, and the oil pump can be controlled more accurately by the closed-loop control mode, so that the running requirement of an engine can be met.

It should be noted that, optionally, more types of sensors may be disposed on the pipeline at the inlet of the high-pressure oil pump 52 to detect the fuel condition entering the engine 51 in real time, for example, a temperature sensor may be disposed to detect the fuel temperature, optionally, depending on the control strategy, a pressure sensor connected to the control unit 48 for closed-loop control of the oil pressure may also be in an open-loop control manner, and the feedback control of the pressure may be obtained by calculating signals collected by an oxygen sensor, a cooling water temperature sensor, and a rotational speed sensor of the engine 51.

Further, the dual-pressure-variable oil pump oil supply system further comprises a first umbrella valve 18, a second valve body 7, a first siphon pipe 17, a second siphon pipe 21, a second umbrella valve 30, a third valve body 40, a third siphon pipe 31 and a fourth siphon pipe 27, wherein the first umbrella valve 18 is arranged in the first oil storage barrel 16; the first interface of the second valve body 7 is communicated with a first driving oil outlet end 10 of a first variable-pressure pump core 11; the first interface of the first siphon pipe 17 is communicated with the second interface of the second valve body 7, the second interface of the first siphon pipe 17 is communicated with the first oil storage barrel 16, and the third interface of the first siphon pipe 17 is communicated with the first umbrella valve 18; the first interface of the second siphon tube 21 is communicated with the third interface of the second valve body 7, the second interface of the second siphon tube 21 is communicated with the first oil storage barrel 16, and the third interface of the second siphon tube 21 is connected with a second oil suction disc 25 arranged in the second oil chamber; the second umbrella valve 30 is disposed in the second oil storage tank 26; the first port of the third valve body 40 communicates with the second drive oil outlet end 39 of the second variable pressure pump core 36; the first port of the third siphon tube 31 is communicated with the second port of the third valve body 40, the second port of the third siphon tube 31 is communicated with the second oil storage barrel 26, and the third port of the third siphon tube 31 is communicated with the second umbrella valve 30; the first port of the fourth siphon tube 27 communicates with the third port of the third valve body 40, the second port of the fourth siphon tube 27 communicates with the second oil storage tank 26, and the third port of the fourth siphon tube 27 is connected with the first oil suction pan 22 provided in the first oil chamber. Through the active driving mode, the siphon flow is ensured to be more stable, and the oil pump damage problem caused by oil-free dry running of the pump core can be relieved to a certain extent by the cross oil suction mode.

It should be noted that, the saddle-shaped oil tank 41 adopted for the high-end sedan type can also be used for other types of SUV, MPV, bus and the like which use large-displacement engines and have larger instantaneous oil consumption of the engines, and the traditional flat-bottom oil tank can also be adopted according to different types of arrangement, namely, the main oil tank and the auxiliary oil tank of the saddle-shaped oil tank 41 become one oil chamber of the traditional flat-bottom oil tank, but the cross injection pipeline connection mode is still effective.

Specifically, the first oil pump assembly 5 further includes a first primary filter screen 20 and a first fine filter 14, the first primary filter screen 20 is disposed in the first oil storage barrel 16, and an outlet end of the first primary filter screen 20 is communicated with an inlet end of the first variable-pressure pump core 11; the first fine filter 14 is arranged in the first oil storage barrel 16, the first fine filtering oil inlet end 13 of the first fine filter 14 is communicated with the first variable pressure oil outlet end 9 of the first variable pressure pump core 11, and the first fine filtering oil outlet end 12 of the first fine filter 14 is communicated with the first oil outlet pipe orifice 3 of the first oil pump; the first fine filter 14 is provided with a first pressure regulating valve 15, and the first pressure regulating valve 15 is used for regulating the oil outlet pressure of the first fine filter 14. Through such setting, the setting of first primary filter screen 20 and first smart filter 14 can realize the filtration to the fuel, gets rid of the impurity in the fuel, reduces the interference of impurity to the operation of engine 51, and first air-vent valve 15 can carry out the accurate adjustment to the play oil pressure of first smart filter 14, adjusts oil pump working capacity at any time, and first primary filter screen 20 and first smart filter 14 all set up in first oil storage barrel 16, can avoid external environment to disturb, saves the interior layout space of car simultaneously.

Specifically, the first oil pump assembly 5 further includes a first oil inlet umbrella valve 19, the first oil inlet umbrella valve 19 is disposed in the first oil storage barrel 16, the first oil storage barrel 16 is communicated with the first oil chamber through the first oil inlet umbrella valve 19, and the first oil inlet umbrella valve 19 is used for adjusting the amount of oil entering the first oil storage barrel 16. In this embodiment, the first oil inlet umbrella valve 19 is a one-way valve, and the arrangement of the first oil inlet umbrella valve 19 can enable the fuel to directly enter the first oil storage barrel 16 through the first oil inlet umbrella valve 19, so as to promote the circulation rate and the circulation quantity of the fuel.

In this embodiment, the first oil inlet umbrella valve 19 is a mechanical valve, based on the communicating vessel principle, when the height of the fuel outside the first oil storage barrel 16 is higher than the height of the fuel inside the first oil storage barrel 16, the fuel will enter the first oil storage barrel 16 through the first oil inlet umbrella valve 19 until the height of the fuel inside and outside the first oil storage barrel 16 is consistent, and when the height of the fuel inside the first oil storage barrel 16 is higher than the height of the fuel outside the first oil storage barrel 16, the first oil inlet umbrella valve 19 is closed under the action of gravity, so that the fuel inside the first oil storage barrel 16 can be effectively prevented from flowing out.

Specifically, the second oil pump assembly 43 further includes a second primary filter 28 and a second fine filter 33, the second primary filter 28 is disposed in the second oil storage tank 26, and an outlet end of the second primary filter 28 is in communication with an inlet end of the second variable pressure pump core 36; the second fine filter 33 is arranged in the second oil storage barrel 26, a second fine filtration oil inlet end 35 of the second fine filter 33 is communicated with a second variable pressure oil outlet end 38 of the second variable pressure pump core 36, and a second fine filtration oil outlet end 34 of the second fine filter 33 is communicated with a second oil outlet pipe orifice 45 of the second oil pump assembly 43; the second fine filter 33 is provided with a second pressure regulating valve 32, and the second pressure regulating valve 32 is used for regulating the oil outlet pressure of the second fine filter 33. Through such setting, the setting of second primary filter screen 28 and second smart filter 33 can realize the filtration to the fuel, gets rid of the impurity in the fuel, reduces the interference of impurity to the operation of engine 51, and second air-vent valve 32 can carry out the accurate adjustment to the play oil pressure of second smart filter 33, adjusts oil pump working capacity at any time, and second primary filter screen 28 and second smart filter 33 all set up in second oil storage bucket 26, can avoid external environment to disturb, saves the interior layout space of car simultaneously.

Specifically, the second oil pump assembly 43 further includes a second oil inlet umbrella valve 29, the second oil inlet umbrella valve 29 is disposed in the second oil storage tank 26, the second oil storage tank 26 is in communication with the second oil chamber through the second oil inlet umbrella valve 29, and the second oil inlet umbrella valve 29 is used for adjusting the amount of oil entering the second oil storage tank 26. In this embodiment, the second oil inlet umbrella valve 29 is a one-way valve, and the arrangement of the second oil inlet umbrella valve 29 can enable the fuel to directly enter the second oil storage barrel 26 through the second oil inlet umbrella valve 29, so as to promote the circulation rate and the circulation quantity of the fuel.

In this embodiment, the second oil inlet umbrella valve 29 is a mechanical valve, based on the principle of communicating vessel, when the height of the fuel outside the second oil storage tank 26 is higher than the height of the fuel inside the second oil storage tank 26, the fuel will enter the second oil storage tank 26 through the second oil inlet umbrella valve 29 until the height of the fuel inside and outside the second oil storage tank 26 is consistent, and when the height of the fuel inside the second oil storage tank 26 is higher than the height of the fuel outside the second oil storage tank 26, the second oil inlet umbrella valve 29 is closed under the action of gravity, so as to effectively prevent the fuel inside the second oil storage tank 26 from flowing out.

According to another embodiment of the present application, there is also provided a vehicle having a dual variable pressure oil pump oil supply system, which is the dual variable pressure oil pump oil supply system in the above embodiment.

Preferably, the vehicle in the embodiment is a high-end luxury car, and also can be related vehicle types such as SUV, MPV, and middle bus which use a large-displacement engine and have large instantaneous oil consumption of the engine.

According to another embodiment of the present application, there is also provided a method for controlling a dual-pressure-variable oil pump oil supply system, the method being used for controlling the dual-pressure-variable oil pump oil supply system, the method including the steps of:

step one, acquiring engine working condition information and fuel temperature information, wherein the engine working condition information at least comprises engine rotating speed information;

Determining a fuel demand based on the engine working condition information and the fuel temperature information, wherein the fuel demand at least comprises a first required rotating speed of the first oil pump assembly 5 and a second required rotating speed of the second oil pump assembly 43;

Step three, based on the fuel demand, a control command is generated, the control command being used to control the first variable pressure pump 11 to operate at the first demanded rotational speed and the second oil pump assembly 43 to operate at the second demanded rotational speed.

Through the control method, when the vehicle is idling or under a medium-small load, the oil consumption of the engine 51 is lower, at the moment, the voltage duty ratio of the oil pump output by the oil pump controller is lower, namely the voltage output to the oil pump is lower, the rotating speed of the oil pump is slower, the output oil quantity is smaller, only the oil quantity requirement of the idling or under the medium-small load is met, the noise of the oil pump is small, the NVH performance can be obviously improved, the complaint of users is avoided, and the problem of overlarge noise caused by full-speed operation of the traditional double constant-pressure oil pump is avoided; when the engine 51 is in a heavy load working condition, the oil consumption is higher, the duty ratio of the oil pump output to the oil pump is higher, namely the voltage output to the oil pump is higher, the rotating speed of the oil pump is higher, the noise of the oil pump is relatively larger, but still the noise is smaller than the noise of the oil pump of the double constant pressure pump oil supply system which runs at full speed, at the moment, the rotating speed of the engine 51 is also higher, the noise of the engine 51 is also larger, and the noise of the variable pressure pump can be effectively covered.

The application also provides a preferred embodiment of the oil supply system of the double variable pressure oil pump, which aims to solve the problems of high cost of mold development, large calibrated workload, meeting the requirement of the maximum oil consumption of an engine, meeting the requirement of the flow and control of the engine and controllable resources of the oil pump and the oil pump control unit 48. According to the scheme, the requirement of ultrahigh oil consumption is met by simultaneously supplying oil to two oil pumps with the same flow rate, and the working capacity of each oil pump only needs to meet 50% of the maximum oil consumption, so that the requirement on the working capacity of the oil pump is obviously reduced, and the flow requirement can be met by a conventional oil pump.

Specifically, the dual-pressure-variable oil pump oil supply system comprises a saddle-shaped oil tank 41, a first oil pump assembly 5, a second oil pump assembly 43, a first valve body 49, a control unit 48, a first oil pump controller 1 and a second oil pump controller 47, wherein the saddle-shaped oil tank 41 is provided with a first oil pump flange 4 and a second oil pump flange 44, the first oil pump controller 1 is connected with a first oil pump flange harness connector 2, the first oil pump flange harness connector 2 is connected with a first oil pump harness connector 8 through a first harness 6, the second oil pump controller 47 is connected with a second oil pump flange harness connector 46, the second oil pump flange harness connector 46 is connected with a second oil pump harness connector 37 through a second harness 42, and the first oil pump controller 1 and the second oil pump controller 47 are electrically connected with the control unit 48, so that the control unit 48 can control the first variable pressure pump core 11 and the second variable pressure pump core 36. In the present embodiment, the control unit 48 is an ECU of the vehicle. The transmission mechanism 23 and the exhaust muffler 24 may be disposed between the first oil chamber and the second oil chamber of the saddle-shaped oil tank 41, improving the vehicle space utilization rate.

The first oil pump assembly 5 comprises a first oil storage barrel 16, a first variable-pressure pump core 11, a first primary filter screen 20, a first fine filter 14 and a first oil inlet umbrella valve 19, wherein the first variable-pressure pump core 11, the first primary filter screen 20, the first fine filter screen 14 and the first oil inlet umbrella valve 19 are arranged in the first oil storage barrel 16, and the outlet end of the first primary filter screen 20 is communicated with the inlet end of the first variable-pressure pump core 11; the first fine filter 14 is arranged in the first oil storage barrel 16, the first fine filtering oil inlet end 13 of the first fine filter 14 is communicated with the first variable pressure oil outlet end 9 of the first variable pressure pump core 11, and the first fine filtering oil outlet end 12 of the first fine filter 14 is communicated with the first oil outlet pipe orifice 3 of the first oil pump; the first fine filter 14 is provided with a first pressure regulating valve 15, and the first pressure regulating valve 15 is used for regulating the oil outlet pressure of the first fine filter 14; the first oil reservoir 16 communicates with the first oil chamber through a first oil inlet umbrella valve 19, the first oil inlet umbrella valve 19 being used for adjusting the amount of oil entering the first oil reservoir 16.

The second oil pump assembly 43 comprises a second oil storage barrel 26, a second variable pressure pump core 36, a second primary filter screen 28, a second fine filter 33 and a second oil inlet umbrella valve 29 which are arranged in the second oil storage barrel 26, wherein the second primary filter screen 28 is arranged in the second oil storage barrel 26, and the outlet end of the second primary filter screen 28 is communicated with the inlet end of the second variable pressure pump core 36; the second fine filter 33 is arranged in the second oil storage barrel 26, a second fine filtration oil inlet end 35 of the second fine filter 33 is communicated with a second variable pressure oil outlet end 38 of the second variable pressure pump core 36, and a second fine filtration oil outlet end 34 of the second fine filter 33 is communicated with a second oil outlet pipe orifice 45 of the second oil pump assembly 43; the second fine filter 33 is provided with a second pressure regulating valve 32, and the second pressure regulating valve 32 is used for regulating the oil outlet pressure of the second fine filter 33; the second oil reservoir 26 communicates with the second oil chamber through a second oil inlet umbrella valve 29, the second oil inlet umbrella valve 29 being used for adjusting the amount of oil entering the second oil reservoir 26.

In this embodiment, the first oil pump assembly 5 and the second oil pump assembly 43 are low-pressure oil pumps, two conventional flow rate fuel pumps with the same flow rate are adopted in the first oil pump assembly 5 and the second oil pump assembly 43, two identical pump cores (i.e. the first variable-pressure pump core 11 and the second variable-pressure pump core 36) and two identical oil pump controllers (i.e. the first oil pump controller 1 and the second oil pump controller 47) adopt the same control strategy. After being filtered by the first primary filter screen 20 and the second primary filter screen 28, the fuel flows out of the first variable-pressure oil outlet end 9 and the second variable-pressure oil outlet end 38 of the first variable-pressure pump core 11 and the second variable-pressure pump core 36 respectively, flows into the first fine filter 14 and the second fine filter 33 from the first fine filter oil inlet end 13 and the second fine filter oil inlet end 35 respectively, flows out of the first fine filter oil outlet end 12 and the second fine filter oil outlet end 34 after being filtered by the fine filters (namely the first fine filter 14 and the second fine filter 33) respectively, flows out of the first oil outlet pipe orifice 3 and the second oil outlet pipe orifice 45, is converged by the first valve body 49, is sent into the high-pressure oil pump 52, is pressurized by the high-pressure oil pump 52 and is sent to the engine 51 for combustion. In order to facilitate the description of the technical effects of the present embodiment, the following description is given to the dual constant pressure oil supply system in the prior art: the traditional double-oil-pump scheme is a constant-pressure system scheme, namely the voltage of a supply oil pump is always 13.5V, the oil pump always operates at the maximum rotation speed, the oil pump always works at the maximum power and the maximum flow point, the requirement of engine oil consumption under various working conditions can be met at all times, but the mode can cause power waste, and a series of problems such as noise and air resistance can be caused.

In the present embodiment, as shown in the table in fig. 5, the pressure demand of the low-pressure oil pump (i.e., the first oil pump assembly 5 and the second oil pump assembly 43) can be determined according to the corresponding different engine fuel consumption and different low-pressure fuel system pressure of the engine 51 under the conditions of different engine speeds and different fuel temperatures.

Specifically, in the oil supply system of this embodiment, according to the flow requirements of the engine 51 under different working conditions, the input voltage of the low-pressure oil pump may be adjusted in real time, the working capacity of the low-pressure oil pump may be adjusted at any time, fuel oil meeting the corresponding flow and pressure under various working conditions may be output as required, no redundant fuel oil flows back, the first pressure regulating valve 15 and the second pressure regulating valve 32 may respectively regulate the oil outlet pressures of the first fine filtered oil outlet 12 and the second fine filtered oil outlet 34, the adjustment of the input voltage of the low-pressure oil pump is implemented through the first oil pump controller 1 and the second oil pump controller 47, the first oil pump controller 1 and the second oil pump controller 47 receive the instructions of the ECU, the voltage duty ratio output to the first oil pump assembly 5 and the second oil pump assembly 43 may be adjusted at any time, and the electric duty ratio signal may be immediately transmitted to the first variable pump core 11 and the second variable pump core 36, so that the corresponding relationship between the electric duty ratio and the equivalent voltage output to the oil pump is shown in fig. 4.

The double-pressure-variable oil pump oil supply system further comprises a first umbrella valve 18, a second valve body 7, a first siphon pipe 17, a second siphon pipe 21, a second umbrella valve 30, a third valve body 40, a third siphon pipe 31 and a fourth siphon pipe 27, wherein the first umbrella valve 18 is arranged in the first oil storage barrel 16; the first interface of the second valve body 7 is communicated with a first driving oil outlet end 10 of a first variable-pressure pump core 11; the first interface of the first siphon pipe 17 is communicated with the second interface of the second valve body 7, the second interface of the first siphon pipe 17 is communicated with the first oil storage barrel 16, and the third interface of the first siphon pipe 17 is communicated with the first umbrella valve 18; the first interface of the second siphon tube 21 is communicated with the third interface of the second valve body 7, the second interface of the second siphon tube 21 is communicated with the first oil storage barrel 16, and the third interface of the second siphon tube 21 is connected with a second oil suction disc 25 arranged in the second oil chamber; the second umbrella valve 30 is disposed in the second oil storage tank 26; the first port of the third valve body 40 communicates with the second drive oil outlet end 39 of the second variable pressure pump core 36; the first port of the third siphon tube 31 is communicated with the second port of the third valve body 40, the second port of the third siphon tube 31 is communicated with the second oil storage barrel 26, and the third port of the third siphon tube 31 is communicated with the second umbrella valve 30; the first port of the fourth siphon tube 27 communicates with the third port of the third valve body 40, the second port of the fourth siphon tube 27 communicates with the second oil storage tank 26, and the third port of the fourth siphon tube 27 is connected with the first oil suction pan 22 provided in the first oil chamber.

In this embodiment, the second valve body 7 injects the fuel oil in the self-oil chamber through the first siphon 17 and the second siphon 21 to enter the first oil storage barrel 16 through the first umbrella valve 18, the fuel oil injected in the opposite side oil chamber enters the first oil storage barrel 16 through the second oil suction disc 25, the third valve body 40 injects the fuel oil in the self-oil chamber through the third siphon 31 and the fourth siphon 27 to enter the second oil storage barrel 26 through the second umbrella valve 30, and the fuel oil injected in the opposite side oil chamber enters the second oil storage barrel 26 through the first oil suction disc 22. The oil pump can avoid the internal air suction problem of the oil pump by a cross oil suction mode, and further relieve the oil pump damage problem caused by oil-free dry running of the pump core. Further, the oil suction ports of the two remote injection pipelines are properly lifted, the height from the inner surface of the oil tank is h, the height h corresponds to the position of an Empty oil level (Empty) point, a part of residual available fuel oil is reserved in the oil tank at the Empty oil level (Empty) point, the residual available fuel oil is (4-10) L, the liquid level is (30-35) mm, and the remote injection pipelines cannot suck all the remote fuel oil. The risk of idle running ablation of the two fuel pumps is avoided, and the stability of fuel supply and the reliability of operation are ensured.

By applying the technical scheme of the embodiment, a double-variable-pressure oil pump scheme is adopted, two oil pump controllers (namely a first oil pump controller 1 and a second oil pump controller 47) respectively and independently control two low-pressure oil pumps, the working capacity of each oil pump only needs to meet 50% of the maximum oil consumption, the working capacity and power of a single oil pump and the oil pump controllers are halved, the fuel pump with conventional flow and the low-power oil pump controller can meet the requirements of the flow and control of an engine 51, and the resources of the oil pump and the oil pump controllers are controllable; the low pressure oil pump supplies the fuel with the pressure and flow rate required by the engine 51 as required, i.e. how much fuel the engine 51 needs to output how much fuel the low pressure oil pump does not need to be operated at full speed at constant voltage all the time, and no backflow of fuel is required. When idling or medium and small load is carried out, the oil consumption of the engine 51 is lower, at the moment, the voltage duty ratio of the oil pump output to the oil pump is lower, namely the voltage output to the oil pump is lower, the rotating speed of the oil pump is lower, the output oil quantity is lower, only the oil quantity requirement of the idling or medium and small load is met, the noise of the oil pump is small, the NVH performance can be obviously improved, the complaint of users is avoided, and the problem of overlarge noise caused by full-speed operation of the traditional double constant-pressure oil pump is avoided; the oil pump always works under partial load, the total heating value of the oil pump is small, and the oil temperature in the oil tank is slowly increased due to heat dissipation of the oil pump, so that the problem of air resistance caused by overhigh oil temperature in the oil tank can be effectively avoided.

Fig. 2 is a diagram comparing oil pump noise of a dual constant pressure oil supply system in the prior art with that of the dual variable pressure oil pump oil supply system of the present application, and the dual variable pressure oil pump oil supply system in the embodiment of the present application has significantly improved NVH performance under medium and small loads, where the noise of the dual variable pressure oil pump is far lower than that of the dual constant pressure oil pump.

Fig. 3 is a comparison diagram of oil pump power of the dual constant pressure oil supply system in the prior art and the dual variable pressure oil pump oil supply system in the present application when running for one cycle 1200s according to the NEDC (New European DRIVING CYCLE) cycle condition, as can be seen from fig. 3, the power of the dual constant pressure oil pump is always kept at 160W, whereas in the dual variable pressure oil pump oil supply system in the embodiment of the present application, the power of the dual variable pressure oil pump is basically kept at about 40W, the energy consumption is saved by about 75%, the total heat productivity of the oil pump is also reduced, the oil temperature rise is slower, and the problem of air resistance caused by the too high oil temperature in the oil tank can be effectively avoided.

Spatially relative terms, such as "above … …," "above … …," "upper surface on … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition to the foregoing, references in the specification to "one embodiment," "another embodiment," "an embodiment," etc., indicate that the particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application, as generally described. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is intended that such feature, structure, or characteristic be implemented within the scope of the application.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A dual pressure swing oil pump oil supply system, comprising:

a saddle-shaped oil tank (41), the saddle-shaped oil tank (41) having a first oil chamber and a second oil chamber, the first oil chamber being provided in communication with the second oil chamber;

The first oil pump assembly (5), the first oil pump assembly (5) is arranged in the first oil chamber, and the first oil pump assembly (5) at least comprises a first oil storage barrel (16) and a first variable-pressure pump core (11) arranged in the first oil storage barrel (16);

A second oil pump assembly (43), wherein the second oil pump assembly (43) is arranged in the second oil chamber, and the second oil pump assembly (43) comprises a second oil storage barrel (26) and a second variable-pressure pump core (36) arranged in the second oil storage barrel (26);

a first valve body (49), wherein a first interface of the first valve body (49) is communicated with a first oil outlet pipe orifice (3) of the first oil pump assembly (5), a second interface of the first valve body (49) is communicated with a second oil outlet pipe orifice (45) of the second oil pump assembly (43), and a third interface of the first valve body (49) is communicated with a high-pressure oil pump (52) on an engine;

The control unit (48), the control unit (48) with first variable-pressure pump core (11) with second variable-pressure pump core (36) electric connection, control unit (48) are used for according to the fuel demand of engine the rotational speed of first variable-pressure pump core (11) with second variable-pressure pump core (36).

2. The dual pressure swing oil pump oil supply system according to claim 1, further comprising:

The first oil pump controller (1), the first oil pump controller (1) is electrically connected with the first variable-pressure pump core (11) and the control unit (48), and the first oil pump controller (1) is used for adjusting the rotating speed of the first variable-pressure pump core (11);

The second oil pump controller (47), the second oil pump controller (47) is electrically connected with the second variable-pressure pump core (36) and the control unit (48), and the second oil pump controller (47) is used for adjusting the rotating speed of the second variable-pressure pump core (36);

the control unit (48) adjusts the rotation speeds of the first variable-pressure pump core (11) and the second variable-pressure pump core (36) by adjusting the output voltage duty ratios of the first oil pump controller (1) and the second oil pump controller (47), respectively.

3. The dual pressure swing oil pump oil supply system according to claim 1, further comprising:

the fuel pressure sensor (50) is arranged on a pipeline of the third interface of the first valve body (49) and the high-pressure oil pump (52), and the fuel pressure sensor (50) is electrically connected with the control unit (48).

4. The dual pressure swing oil pump oil supply system according to claim 1, wherein the first oil pump assembly (5) further comprises:

the first primary filter screen (20), the first primary filter screen (20) is arranged in the first oil storage barrel (16), and the outlet end of the first primary filter screen (20) is communicated with the inlet end of the first variable-pressure pump core (11);

The first fine filter (14) is arranged in the first oil storage barrel (16), a first fine filtering oil inlet end (13) of the first fine filter (14) is communicated with a first variable pressure oil outlet end (9) of the first variable pressure pump core (11), and a first fine filtering oil outlet end (12) of the first fine filter (14) is communicated with the first oil outlet pipe orifice (3) of the first oil pump assembly (5);

The oil outlet pressure regulating device comprises a first fine filter (14), wherein a first pressure regulating valve (15) is arranged on the first fine filter (14), and the first pressure regulating valve (15) is used for regulating the oil outlet pressure of the first fine filter (14).

5. The dual pressure swing oil pump oil supply system according to claim 1 or 4, wherein the second oil pump assembly (43) further includes:

A second primary screen (28), wherein the second primary screen (28) is arranged in the second oil storage barrel (26), and the outlet end of the second primary screen (28) is communicated with the inlet end of the second variable-pressure pump core (36);

a second fine filter (33), wherein the second fine filter (33) is arranged in the second oil storage barrel (26), a second fine filtration oil inlet end (35) of the second fine filter (33) is communicated with a second pressure-variable oil outlet end (38) of the second variable-pressure pump core (36), and a second fine filtration oil outlet end (34) of the second fine filter (33) is communicated with the second oil outlet pipe orifice (45) of the second oil pump assembly (43);

the second fine filter (33) is provided with a second pressure regulating valve (32), and the second pressure regulating valve (32) is used for regulating the oil outlet pressure of the second fine filter (33).

6. The dual pressure swing oil pump oil supply system according to claim 1 or 4, further comprising:

a first umbrella valve (18), the first umbrella valve (18) being disposed within the first oil storage tank (16);

The first interface of the second valve body (7) is communicated with a first driving oil outlet end (10) of the first variable-pressure pump core (11);

a first siphon (17), a first port of the first siphon (17) is communicated with a second port of the second valve body (7), a second port of the first siphon (17) is communicated with the first oil storage barrel (16), and a third port of the first siphon (17) is communicated with the first umbrella valve (18);

A second siphon pipe (21), wherein a first interface of the second siphon pipe (21) is communicated with a third interface of the second valve body (7), a second interface of the second siphon pipe (21) is communicated with the first oil storage barrel (16), and the third interface of the second siphon pipe (21) is connected with a second oil suction disc (25) arranged in the second oil chamber;

a second umbrella valve (30), the second umbrella valve (30) being disposed within the second oil storage tank (26);

a third valve body (40), a first interface of the third valve body (40) being in communication with a second drive oil outlet end (39) of the second variable pressure pump core (36);

A third siphon (31), a first port of the third siphon (31) being in communication with a second port of the third valve body (40), a second port of the third siphon (31) being in communication with the second oil reservoir (26), a third port of the third siphon (31) being in communication with the second umbrella valve (30);

And a fourth siphon pipe (27), wherein a first interface of the fourth siphon pipe (27) is communicated with a third interface of the third valve body (40), a second interface of the fourth siphon pipe (27) is communicated with the second oil storage barrel (26), and the third interface of the fourth siphon pipe (27) is connected with a first oil suction disc (22) arranged in the first oil chamber.

7. The dual pressure swing oil pump oil supply system according to claim 6, wherein the first oil pump assembly (5) further comprises:

The first oil inlet umbrella valve (19), first oil inlet umbrella valve (19) set up in first oil storage bucket (16), first oil storage bucket (16) pass through first oil inlet umbrella valve (19) with first oil chamber intercommunication, first oil inlet umbrella valve (19) are used for adjusting the oil mass that gets into first oil storage bucket (16).

8. The dual pressure swing oil pump oil supply system according to claim 6, wherein the second oil pump assembly (43) further includes:

The second oil inlet umbrella valve (29), the second oil inlet umbrella valve (29) set up in second oil storage bucket (26), second oil storage bucket (26) pass through second oil inlet umbrella valve (29) with second grease chamber intercommunication, second oil inlet umbrella valve (29) are used for adjusting the oil mass that gets into second oil storage bucket (26).

9. A vehicle having a dual variable pressure oil pump oil supply system, characterized in that the dual variable pressure oil pump oil supply system is the dual variable pressure oil pump oil supply system according to any one of claims 1 to 8.

10. A control method of a double variable pressure oil pump oil supply system, characterized in that the method is for controlling the double variable pressure oil pump oil supply system according to any one of claims 1 to 8, the method comprising the steps of:

acquiring engine working condition information and fuel temperature information, wherein the engine working condition information at least comprises engine rotating speed information;

Determining a fuel demand based on the engine operating condition information and the fuel temperature information, the fuel demand including at least a first demanded rotational speed of the first oil pump assembly (5) and a second demanded rotational speed of the second oil pump assembly (43);

Based on the fuel demand, a control command is generated for controlling the first variable pressure pump core (11) to operate at the first demand rotational speed and the second oil pump assembly (43) to operate at the second demand rotational speed.