Double-layer oil pan lubricating system of integrated air conditioner

Abstract

The double-layer oil pan lubricating system of the integrated air conditioner comprises an oil pan, an oil duct and a cooling system, the oil pan comprises an outer shell and an inner shell arranged in the outer shell, the inner shell is used for containing engine oil, the outer shell and the cooling system circulate for allowing cooling liquid to flow, and the cooling liquid in the outer shell is used for cooling the engine oil in the inner shell; engine oil in the inner shell flows to the oil duct, and the cooling system is used for cooling the cooling liquid. Due to the fact that a traditional engine oil cooler is omitted, the overall resistance of a lubricating system is reduced, the rotation displacement of the electronic engine oil pump can be further reduced, the overall size of the electronic engine oil pump is reduced, arrangement and installation are convenient, and the total shaft power of the electronic engine oil pump is also reduced.

Description

Technical Field

[0001] The invention relates to the technical field of vehicles, and in particular to a double-layer oil pan lubrication system integrated with an air conditioner. Background Art

[0002] The engine lubrication system is an important system to ensure the normal operation of the engine. The main function of the lubrication system is to continuously deliver clean engine oil to the friction surfaces of various engine parts to reduce the friction and wear of the parts, while also playing the role of cooling, cleaning, sealing, and buffering.

[0003] The existing engine lubrication system generally uses an oil cooler connected in series in the lubrication oil circuit to cool the high-temperature oil. This structure has the disadvantages of increasing oil circuit resistance and occupying layout space. Since the oil cooler is connected in series, the oil pump requires a greater back pressure to pump the oil to each engine friction pair, which increases the shaft power of the oil pump and thus increases the overall fuel consumption of the engine. Summary of the invention

[0004] In view of this, the present invention provides a double-layer oil pan lubrication system with integrated air conditioning, which adopts a double-layer oil pan layout, replaces the original oil cooler for heat dissipation, improves the structural strength, and also improves the NVH of the engine.

[0005] The present invention provides a double-layer oil pan lubrication system with integrated air conditioning, which adopts the following technical solution:

[0006] A double-layer oil pan lubrication system with integrated air conditioning includes an oil pan, an oil channel and a cooling system, wherein the oil pan includes an outer shell and an inner shell arranged inside the outer shell, the inner shell is used to contain engine oil, the outer shell is in communication with the cooling system for supplying coolant, the coolant in the outer shell is used to cool the engine oil in the inner shell, the engine oil in the inner shell flows to the oil channel, and the cooling system is used to cool the coolant.

[0007] Optionally, an electronic oil pump is also included, and the oil channel includes a main oil channel and a side oil channel. The electronic oil pump is used to flow the oil in the inner shell into the main oil channel through an oil filter, and the oil in the main oil channel flows into the side oil channel through a valve.

[0008] Optionally, the side oil channel includes side oil channel one and side oil channel two, and the valve is a proportional three-way valve, which is arranged on the main oil channel, and the three interfaces of the proportional three-way valve are respectively connected to the main oil channel, side oil channel one and side oil channel two.

[0009] Optionally, the branch oil passage 1 includes a cylinder head exhaust side lubricating oil passage, and the cylinder head exhaust side lubricating oil passage is used to deliver engine oil to the exhaust side camshaft, hydraulic tappet and VVT.

[0010] Optionally, the second branch oil passage includes a cylinder head intake side lubricating oil passage, and the cylinder head intake side lubricating oil passage is used to transport the engine oil to the intake side camshaft, hydraulic tappet, VVT and high-pressure fuel pump.

[0011] Optionally, the first side branch oil passage is a piston cooling nozzle oil passage, and an electronically controlled PCJ valve is provided on the piston cooling nozzle oil passage, and the electronically controlled PCJ valve is used to control the injection timing of the piston cooling nozzle PCJ.

[0012] Optionally, the first side branch oil passage is a piston cooling nozzle oil passage, and an electronically controlled PCJ valve is provided on the piston cooling nozzle oil passage, and the electronically controlled PCJ valve is used to control the injection timing of the piston cooling nozzle PCJ.

[0013] Optionally, coaxial tubes are provided at the air inlet end of the compressor and the liquid outlet end of the condenser respectively.

[0014] Optionally, a SOV stop valve and a TXV thermal expansion valve are provided on the cooling channel flowing between the liquid outlet end of the condenser and the shell.

[0015] Optionally, a second SOV valve is provided at the liquid inlet end of the evaporator, the evaporator comprises a front evaporator and a rear evaporator, the front evaporator and the rear evaporator are arranged in parallel, and a thermostatic expansion valve is provided at the liquid inlet end of the front evaporator and the rear evaporator respectively.

[0016] In summary, the present invention includes at least one of the following beneficial technical effects:

[0017] 1. By setting up a double-layer oil pan layout with an inner shell and an outer shell, the original oil cooler is replaced for heat dissipation, and the structural strength is improved, and the NVH of the engine is also improved.

[0018] 2. Since the traditional oil cooler is reduced, the overall resistance of the lubrication system is reduced, the displacement of the electronic oil pump can be further reduced, the overall size of the electronic oil pump can be reduced, the layout and installation are facilitated, and the total electronic oil pump shaft power is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a flow chart of an embodiment of the present invention.

[0020] Explanation of the reference numerals in the accompanying drawings: 1. Inner shell; 2. Outer shell; 3. Electronic oil pump; 4. Main oil channel; 5. Oil filter; 6. Proportional three-way valve; 7. Lubricating oil channel on the exhaust side of the cylinder head; 8. Lubricating oil channel on the intake side of the cylinder head; 9. Piston cooling nozzle oil channel; 10. Electronically controlled PCJ valve; 11. Condenser; 12. Compressor; 13. Front evaporator; 14. Rear evaporator; 15. SOV stop valve one; 16. TXV thermal expansion valve; 17. SOV valve two; 18. Constant temperature expansion valve; 19. Supercharger; 20. Oil pressure sensor; 21. Coaxial tube; 22. Chiller. DETAILED DESCRIPTION

[0021] The following is combined with Figure 1 The present invention is described in further detail.

[0022] The embodiment of the present invention discloses a double-layer oil pan lubrication system integrated with an air conditioner.

[0023] Reference Figure 1 A double-layer oil pan lubrication system with integrated air conditioning includes an oil pan, an oil channel and a cooling system. The oil pan includes an outer shell 2 and an inner shell 1 disposed inside the outer shell 2. The inner shell 1 is used to contain engine oil. The outer shell 2 is in communication with the cooling system for coolant flow. The coolant in the outer shell 2 is used to cool the engine oil in the inner shell 1. The engine oil in the inner shell 1 flows to the oil channel. The cooling system is used to cool the coolant. Since the traditional engine oil cooler is reduced, the overall resistance of the lubrication system is reduced, the displacement of the electronic engine oil pump 3 can be further reduced, the overall size of the electronic engine oil pump 3 can be reduced, the layout and installation are convenient, and the total shaft power of the electronic engine oil pump 3 is also reduced.

[0024] It also includes an electronic oil pump 3, and the oil channel includes a main oil channel 4 and a side oil channel. The electronic oil pump 3 is used to flow the oil in the inner shell 1 into the main oil channel 4 through the oil filter 5, and the oil in the main oil channel 4 flows into the side oil channel through the valve. Another part of the oil in the main oil channel 4 flows back to the inner shell 1 through the supercharger 19. An oil pressure sensor 20 is arranged on the main oil channel 4. The electronic oil pump 3 adjusts the speed according to different engine working conditions, speed, torque and oil temperature to achieve precise pressure control of the main oil channel 4. The oil pump is selected and designed according to the maximum flow requirement of the engine. When the engine is at low speed, the electronic oil pump 3 can run at a high speed to ensure the oil pressure of the engine at low speed, reduce the minimum displacement of the oil pump, thereby reducing the overall size of the oil pump, simple layout and high space utilization.

[0025] The side oil passage includes side oil passage 1 and side oil passage 2, and the valve is a proportional three-way valve 6, which is arranged on the main oil passage 4, and the three interfaces of the proportional three-way valve 6 are respectively in communication with the main oil passage 4, the side oil passage 1 and the side oil passage 2. The interface between the proportional three-way valve 6 and the main oil passage 4 is interface 1, the interface between the proportional three-way valve 6 and the side oil passage 1 is interface 2, and the interface between the proportional three-way valve 6 and the side oil passage 2 is interface 3.

[0026] The second branch oil passage includes a cylinder head intake side lubricating oil passage 8, which is used to transport the engine oil to the intake side camshaft, hydraulic tappet, VVT and high-pressure fuel pump.

[0027] The side branch oil passage 1 is the piston cooling nozzle oil passage 9, and the piston cooling nozzle oil passage 9 is provided with an electric control PCJ valve 10, which is used to control the injection timing of the piston cooling nozzle PCJ. The electric control PCJ valve 10 is combined with the proportional three-way valve 6, and is controlled by controlling the two interfaces 2 and 3 to be opened at the same time or the two interfaces to be opened and the three interfaces to be closed, so that the engine power per liter is less than 30Kw and the engine power per liter is opened when the engine power per liter is greater than 30Kw. In addition, as the power per liter increases, the flow cross-sectional area of ​​the flow passage of interface 2 is increased, so that a larger flow of oil is used to cool the piston cooling nozzle (and cooling on demand).

[0028] An electronically controlled PCJ valve 10 is provided to uniformly control the injection timing of the piston cooling nozzle PCJ. Generally speaking, when the engine power per liter is below 30 kW, the piston heat load is relatively low and does not require cooling. Therefore, the proportional three-way valve 6 closes or opens the corresponding interface according to the engine power per liter to control the cooling of the piston as needed.

[0029] The cooling system includes a condenser 11, a compressor 12 and an evaporator. The coolant in the shell 2 merges with the refrigerant flowing out of the evaporator and flows into the compressor 12 and is compressed by the compressor 12 into high-temperature, high-pressure superheated steam. The condenser 11 is used to cool the high-temperature and high-pressure refrigerant gas discharged from the compressor 12 into low-temperature and high-pressure coolant.

[0030] The air inlet end of the compressor 12 and the liquid outlet end of the condenser 11 are provided with coaxial tubes 21. The connection of the coaxial tubes 21 helps to reduce the leakage of gas or liquid during the transmission process, thereby improving the overall efficiency of the system; since the air or liquid flows in the coaxial tubes 21, external interference is reduced, thereby improving the transmission efficiency; the connection of the coaxial tubes 21 makes the installation and disassembly between the compressor 12 and the condenser 11 easier, and also facilitates the subsequent maintenance work.

[0031] The cooling channel between the liquid outlet of the condenser 11 and the housing 2 is provided with a SOV stop valve 15 and a TXV thermal expansion valve 16. After the condenser 11 of the air conditioning system is used, a SOV stop valve and a TXV thermal expansion valve 16 are used to perform convection heat exchange on the housing 2, and the oil pan temperature is lowered and then pumped into the oil filter 5 and the main oil channel 4 by the electronic oil pump 3 to achieve lubrication of each friction pair and cooling of the piston.

[0032] Also included is a Chiller 22, a machine that lowers the ambient temperature by circulating a refrigerant, and a Chiller 22 and an evaporator are connected in parallel.

[0033] The liquid inlet end of the evaporator is provided with a second SOV valve 17. The evaporator includes a front evaporator 13 and a rear evaporator 14. The front evaporator 13 and the rear evaporator 14 are arranged in parallel. The liquid inlet ends of the front evaporator 13 and the rear evaporator 14 are respectively provided with a thermostatic expansion valve 18. The valve opening is automatically adjusted according to the evaporation pressure to maintain a constant evaporation pressure, optimize the channel flow structure, improve the yield, quality, precision and efficiency of the automobile air-conditioning evaporator, save energy consumption and raw materials, and improve the energy utilization economy of the evaporation operation. The parallel arrangement allows the secondary steam of the previous evaporator to be used as the heating steam of the next evaporator, thereby improving the steam utilization rate.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A double-layer oil sump lubrication system with integrated air conditioning, characterized in that: It includes an oil pan, an oil channel and a cooling system. The oil pan includes an outer shell and an inner shell arranged inside the outer shell. The inner shell is used to contain engine oil. The outer shell is in communication with the cooling system for supplying coolant. The coolant in the outer shell is used to cool the engine oil in the inner shell. The engine oil in the inner shell flows to the oil channel. The cooling system is used to cool the coolant.

2. The double-layer oil sump lubrication system of the integrated air conditioner according to claim 1, characterized in that: It also includes an electronic oil pump, the oil channel includes a main oil channel and a side oil channel, the electronic oil pump is used to flow the oil in the inner shell into the main oil channel through the oil filter, and the oil in the main oil channel flows into the side oil channel through a valve.

3. The double-layer oil sump lubrication system of the integrated air conditioner according to claim 2 is characterized in that: The side oil channel includes side oil channel one and side oil channel two, and the valve is a proportional three-way valve, which is arranged on the main oil channel. The three interfaces of the proportional three-way valve are respectively in communication with the main oil channel, side oil channel one and side oil channel two.

4. The double-layer oil sump lubrication system for integrated air conditioning according to claim 3 is characterized in that: The side branch oil passage 1 includes a cylinder head exhaust side lubricating oil passage, and the cylinder head exhaust side lubricating oil passage is used to transport the engine oil to the exhaust side camshaft, hydraulic tappet and VVT.

5. The double-layer oil sump lubrication system for integrated air conditioning according to claim 3, characterized in that: The second branch oil passage includes a cylinder head intake side lubricating oil passage, and the cylinder head intake side lubricating oil passage is used to transport engine oil to the intake side camshaft, hydraulic tappet, VVT and high-pressure fuel pump.

6. The double-layer oil sump lubrication system of the integrated air conditioner according to claim 3 is characterized in that: The first side branch oil passage is a piston cooling nozzle oil passage, and an electronically controlled PCJ valve is provided on the piston cooling nozzle oil passage. The electronically controlled PCJ valve is used to control the oil injection timing of the piston cooling nozzle PCJ.

7. The double-layer oil sump lubrication system for integrated air conditioning according to claim 1, characterized in that: The cooling system includes a condenser, a compressor and an evaporator. The coolant in the shell merges with the refrigerant flowing out of the evaporator and flows into the compressor and is compressed by the compressor into high-temperature, high-pressure superheated steam. The condenser is used to cool the high-temperature and high-pressure refrigerant gas discharged from the compressor into low-temperature and high-pressure coolant.

8. The double-layer oil sump lubrication system for integrated air conditioning according to claim 7, characterized in that: The air inlet end of the compressor and the liquid outlet end of the condenser are correspondingly provided with coaxial tubes.

9. The double-layer oil sump lubrication system for integrated air conditioning according to claim 7, characterized in that: A SOV stop valve and a TXV thermal expansion valve are provided on the cooling channel circulating between the liquid outlet end of the condenser and the shell.

10. The double-layer oil sump lubrication system of the integrated air conditioner according to claim 7, characterized in that: The liquid inlet end of the evaporator is provided with a second SOV valve. The evaporator comprises a front evaporator and a rear evaporator. The front evaporator and the rear evaporator are arranged in parallel. The liquid inlet ends of the front evaporator and the rear evaporator are respectively provided with a thermostatic expansion valve.

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