Engine lubricating system and vehicle

Abstract

The utility model discloses an engine lubrication system and a vehicle, the engine lubrication system comprises an oil pan, a heater is arranged in the oil pan, the outlet end of the oil pan is connected with an engine oil cooler, and the outlet end of the engine oil cooler is connected with an engine oil filter; the outlet end of the engine oil filter is communicated with the inlet end of the main oil duct, a three-way valve is arranged at the outlet end of the main oil duct, and the outlet end of the main oil duct is communicated with a first port of the three-way valve; the inlet end of the cylinder cover lubricating oil channel is communicated with a second port of the three-way valve; and an inlet end of the piston cooling oil duct is communicated with a third port of the three-way valve. The heater is arranged in the oil pan, when engine oil is in a temperature working condition of slow flowing, the temperature of the engine oil is raised through the heating effect of the heater, then the normal temperature sent by the engine oil is quickly reached, and the problem that an engine is difficult to start under a low-temperature working condition is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to an engine lubrication system and a vehicle. Background Art

[0002] In the traditional engine lubrication system at extremely low temperatures in winter (such as -45°C), due to the influence of the viscosity of the engine oil, it is very difficult for the oil pump to pump the viscous paste-like engine oil between each friction pair for lubrication, resulting in abnormal wear problems of the engine friction pairs; in addition, the high-viscosity engine oil will also increase the shaft power of the oil pump, greatly increasing the fuel consumption rate of the engine. Summary of the Utility Model

[0003] The purpose of the utility model is to provide an engine lubrication system and a vehicle to solve the problem that it is difficult to pump viscous engine oil between each friction pair at extremely low temperatures.

[0004] In a first aspect, the utility model provides an engine lubrication system, including:

[0005] An oil pan, a heater is arranged in the oil pan, the outlet end of the oil pan is connected with an engine oil cooler, and the outlet end of the engine oil cooler is connected with an engine oil filter;

[0006] A main oil passage, the outlet end of the engine oil filter is communicated with the inlet end of the main oil passage, a three-way valve is arranged at the outlet end of the main oil passage, and the outlet end of the main oil passage is communicated with the first port of the three-way valve;

[0007] A cylinder head lubricating oil passage, the inlet end of the cylinder head lubricating oil passage is communicated with the second port of the three-way valve;

[0008] A piston cooling oil passage, the inlet end of the piston cooling oil passage is communicated with the third port of the three-way valve.

[0009] For an engine lubrication system as described above, preferably, the heater is connected to a power battery, and the power battery is used to supply power to the heater.

[0010] For an engine lubrication system as described above, preferably, an electronic oil pump is arranged on the connecting pipeline between the oil pan and the engine oil cooler.

[0011] For an engine lubrication system as described above, preferably, an engine oil pressure sensor is arranged on the main oil passage.

[0012] For an engine lubrication system as described above, preferably, a supercharger is connected to the outlet end of the main oil passage.

[0013] An engine lubrication system as described above, wherein preferably, a plurality of electronically controlled PCJ valves are provided on the piston cooling oil passage, and the electronically controlled PCJ valves are used for cooling control of the piston.

[0014] An engine lubrication system as described above, wherein preferably, the cylinder head lubricating oil passage includes a cylinder head intake side lubricating oil passage and a cylinder head exhaust side lubricating oil passage, and the inlet end of the cylinder head intake side lubricating oil passage and the cylinder head exhaust side lubricating oil passage are both communicated with the second port of the three-way valve.

[0015] An engine lubrication system as described above, wherein preferably, the outlet end of the cylinder head intake side lubricating oil passage is connected to the camshaft, VVT and high-pressure fuel pump on the cylinder head intake side.

[0016] An engine lubrication system as described above, wherein preferably, the outlet end of the cylinder head exhaust side lubricating oil passage is connected to the camshaft, VVT and high-pressure fuel pump on the cylinder head exhaust side.

[0017] In a second aspect, the present invention provides a vehicle including the aforementioned engine lubrication system.

[0018] Compared with the prior art, a heater is provided in the oil pan of the present invention. When the engine oil is in a temperature condition of slow flow, the engine oil is heated by the heater, so as to quickly reach the normal temperature for engine oil pumping, and the problem of difficult engine start under low temperature conditions is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the engine lubrication system provided by an embodiment of the whole of the present invention.

[0020] Description of the reference numerals:

[0021] 1 - oil pan, 2 - heater, 3 - engine oil cooler, 4 - engine oil filter, 5 - main oil passage, 6 - three-way valve, 61 - first port, 62 - second port, 64 - third port, 7 - cylinder head lubricating oil passage, 71 - cylinder head intake side lubricating oil passage, 72 - cylinder head exhaust side lubricating oil passage, 8 - piston cooling oil passage, 9 - power battery, 10 - electronic engine oil pump, 11 - engine oil pressure sensor, 12 - supercharger, 13 - electronically controlled PCJ valve, 14 - camshaft, VVT and high-pressure fuel pump on the cylinder head intake side, 15 - camshaft, VVT and high-pressure fuel pump on the cylinder head exhaust side, 16 - main bearing, 17 - connecting rod bearing. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0023] In a first aspect, as shown in Figure 1 Figure 1 , the present utility model provides an engine lubrication system, which includes an oil pan 1, a main oil passage 5, a cylinder head lubricating oil passage 7, and a piston cooling oil passage 8, where:

[0024] The oil pan 1 stores engine oil. When the external environmental temperature is relatively low, due to the influence of the viscosity of the engine oil, the viscous paste-like engine oil is difficult to be sent between each friction pair to lubricate the friction pair, which may lead to abnormal friction and damage of the friction pairs of the engine. In the embodiment provided by the present application, a heater 2 is provided in the oil pan 1. When the system is in an extremely cold temperature, the heater 2 heats the viscous engine oil to increase the temperature of the engine oil and change the viscous state of the engine oil, so that the engine oil can be normally sent between each friction pair.

[0025] In a feasible implementation manner, the heater 2 is connected to a power battery 9, and the power battery 9 supplies power to the heater 2 so that the heater 2 can heat the engine oil in the oil pan 1. When the engine oil in the oil pan 1 rises to a temperature at which it can be pumped, the power battery 9 stops supplying power, thereby solving the problem that the engine is difficult to start in a low-temperature environment. In other implementation manners, other structures or components can be used to supply power to the heater 2, which is not limited herein.

[0026] The main oil passage 5 can convey the engine oil in the oil pan 1 to the cylinder head lubricating oil passage 7, the piston cooling oil passage 8, a supercharger 12, the main bearings 16 of each component in the engine, and the connecting rod bearings 17 respectively, so that the corresponding parts can be lubricated or cooled.

[0027] An engine oil cooler 3 and an engine oil filter 4 are provided between the main oil passage 5 and the oil pan 1. The outlet end of the oil pan 1 is communicated with the inlet end of the engine oil cooler 3, the outlet end of the engine oil cooler 3 is communicated with the inlet end of the engine oil filter 4, and the outlet end of the engine oil filter 4 is communicated with the inlet end of the main oil passage 5. The oil pan 1, the engine oil cooler 3, the engine oil filter 4, and the main oil passage 5 are connected in series in sequence, and the engine oil in the oil pan 1 enters the main oil passage 5 after passing through the engine oil cooler 3 and the engine oil filter 4.

[0028] An electronic engine oil pump 10 is provided on the connecting pipeline between the oil pan 1 and the engine oil cooler 3. The electronic engine oil pump 10 can adjust the rotation speed of the electronic engine oil pump 10 according to the engine speed, torque, and oil temperature when the engine is in different working conditions, so as to accurately control the pressure of the main oil passage 5 and meet the requirements for engine oil under different working conditions of the engine.

[0029] Furthermore, to facilitate the control of the pressure of the main oil passage 5 by the electric oil pump 10, an oil pressure sensor 11 is provided on the main oil passage 5. By monitoring the real-time pressure of the main oil passage 5 through the oil pressure sensor 11, the pressure condition of the main oil passage 5 can be understood, and then the rotation speed of the electric oil pump 10 can be adjusted in real time according to the pressure condition of the main oil passage 5, so that the main oil passage 5 can have the most suitable pressure for oil delivery.

[0030] A three-way valve 6 is provided at the outlet end of the main oil passage 5. The first port 61 of the three-way valve 6 is communicated with the outlet end of the main oil passage 5, the second port 62 of the three-way valve 6 is communicated with the inlet end of the cylinder head lubricating oil passage 7, and the third port 63 of the three-way valve 6 is communicated with the piston cooling oil passage 8. When the engine's power per liter is less than 30 Kw, the heat load of the piston is relatively low and cooling is not required. The flow cross-sectional area of the second port 62 of the three-way valve 6 can be increased so that more oil from the main oil passage 5 flows to the cylinder head lubricating oil passage 7. As the engine's power per liter increases, the flow cross-sectional area of the third port 63 of the three-way valve 6 is correspondingly increased, so that a larger flow of oil flows to the piston cooling oil passage 8 to cool and lower the temperature of the piston, and thus the on-demand cooling of the piston can be realized.

[0031] In the embodiments provided by the present application, the piston cooling oil passage 8 includes a plurality of pistons, and each piston corresponds to a piston cooling nozzle. The piston is cooled by spraying oil through the piston cooling nozzle. To precisely control the cooling temperature of the piston, a plurality of electronically controlled PCJ valves 13 are provided on the piston cooling oil passage 8. The electronically controlled PCJ valves 13 are used to control the opening or closing of the piston cooling nozzles. When the engine's power per liter is greater than 30 Kw, the heat load of the piston increases and the piston needs to be cooled. At this time, the flow cross-sectional area of the third port 63 of the three-way valve 6 can be increased, and the amount of oil flowing to the piston cooling oil passage 8 is correspondingly increased. At the same time, a plurality of electronically controlled PCJ valves 13 are opened, so that a plurality of piston cooling nozzles spray oil to cool the piston at the same time. By controlling the simultaneous opening or closing of a plurality of electronically controlled PCJ valves 13, the injection time of the piston cooling nozzles for the piston can be uniformly controlled, and thus the consistency of piston cooling can be ensured.

[0032] In the embodiments provided by the present application, the cylinder head lubricating oil passage 7 includes a cylinder head intake side lubricating oil passage 71 and a cylinder head exhaust side lubricating oil passage 72. The cylinder head intake side lubricating oil passage 71 and the cylinder head exhaust side lubricating oil passage 72 are two independent oil passages, and the components connected to the cylinder head intake side lubricating oil passage 71 and the cylinder head exhaust side lubricating oil passage 72 all require oil for lubrication. Referring to Figure 1 As shown, the inlet ends of both the cylinder head intake side lubricating oil passage 71 and the cylinder head exhaust side lubricating oil passage 72 are communicated with the second port 62 of the three-way valve 6, and the oil input from the main oil passage 5 can be respectively transmitted to the cylinder head intake side lubricating oil passage 71 and the cylinder head exhaust side lubricating oil passage 72 through the second port 62 of the three-way valve 6.

[0033] The components connected to the lubricating oil passage 71 on the intake side of the cylinder head include the camshaft, VVT, and high-pressure fuel pump 14 on the intake side of the cylinder head, etc. The engine oil flows through the lubricating oil passage 71 on the intake side of the cylinder head to the camshaft, VVT, and high-pressure fuel pump 14 on the intake side of the cylinder head to achieve lubrication of the corresponding components.

[0034] The components connected to the lubricating oil passage 72 on the exhaust side of the cylinder head include the camshaft, VVT, and high-pressure fuel pump 15 on the exhaust side of the cylinder head, etc. The engine oil flows through the lubricating oil passage 72 on the exhaust side of the cylinder head to the camshaft, VVT, and high-pressure fuel pump 15 on the exhaust side of the cylinder head to achieve lubrication of the corresponding components.

[0035] For the engine lubrication system provided by the embodiments of the present application, the paths of engine oil lubrication and cooling include the following situations:

[0036] 1. Oil pan 1 - Electric oil pump 10 - Oil cooler 3 - Oil filter 4 - Oil pressure sensor 11 - Main oil passage 5 - Piston cooling nozzle - Piston;

[0037] 2. Oil pan 1 - Electric oil pump 10 - Oil cooler 3 - Oil filter 4 - Oil pressure sensor 11 - Main oil passage 5 - Main bearing 16 - Connecting rod bearing 17;

[0038] 3. Oil pan 1 - Electric oil pump 10 - Oil cooler 3 - Oil filter 4 - Oil pressure sensor 11 - Main oil passage 5 - Lubricating oil passage 71 on the intake side of the cylinder head / Lubricating oil passage 72 on the exhaust side of the cylinder head - Camshaft - Rocker arm mechanism;

[0039] 4. Oil pan 1 - Electric oil pump 10 - Oil cooler 3 - Oil filter 4 - Oil pressure sensor 11 - Main oil passage 5 - Lubricating oil passage 71 on the intake side of the cylinder head / Lubricating oil passage 72 on the exhaust side of the cylinder head - VVT;

[0040] 5. Oil pan 1 - Electric oil pump 10 - Oil cooler 3 - Oil filter 4 - Oil pressure sensor 11 - Main oil passage 5 - Lubricating oil passage 71 on the intake side of the cylinder head / Lubricating oil passage 72 on the exhaust side of the cylinder head - High-pressure fuel pump;

[0041] 6. Oil pan 1 - Electric oil pump 10 - Oil cooler 3 - Oil filter 4 - Oil pressure sensor 11 - Main oil passage 5 - Turbocharger 12.

[0042] In a second aspect, the present utility model provides a vehicle, including the aforementioned engine lubrication system. At extremely low temperatures in winter (e.g., -45°C), the vehicle can still pump the originally viscous engine oil to components such as friction pairs that need lubrication, avoiding wear caused by abnormal friction of the friction pairs, and thus enabling the vehicle to still operate smoothly in an extremely cold external environment.

[0043] The structure, features and effects of the present utility model have been described in detail based on the embodiments shown in the drawings. The above are only the preferred embodiments of the present utility model, but the present utility model is not limited to the implementation scope shown in the drawings. Any changes made in accordance with the concept of the present utility model, or equivalent embodiments modified into equivalent changes, still within the spirit covered by the specification and drawings, shall fall within the protection scope of the present utility model.

Claims

1. An engine lubrication system, characterized in that, Comprising: An oil pan, a heater is provided inside the oil pan, an outlet end of the oil pan is connected to an oil cooler, and an outlet end of the oil cooler is connected to an inlet end of an oil filter; A main oil passage, an outlet end of the oil filter is communicated with an inlet end of the main oil passage, a three-way valve is provided at an outlet end of the main oil passage, and the outlet end of the main oil passage is communicated with a first port of the three-way valve; A cylinder head lubricating oil passage, an inlet end of the cylinder head lubricating oil passage is communicated with a second port of the three-way valve; A piston cooling oil passage, an inlet end of the piston cooling oil passage is communicated with a third port of the three-way valve.

2. The engine lubrication system according to claim 1, wherein The heater is connected to a power battery, and the power battery is used to supply power to the heater.

3. The engine lubrication system according to claim 1, characterized in that, An electronic oil pump is provided on a connecting pipeline between the oil pan and the oil cooler.

4. The engine lubrication system according to claim 1, wherein An oil pressure sensor is provided on the main oil passage.

5. The engine lubrication system according to claim 1, characterized in that, A supercharger is connected to an outlet end of the main oil passage.

6. The engine lubrication system according to claim 1, characterized in that, A plurality of electronically controlled PCJ valves are provided on the piston cooling oil passage, and the electronically controlled PCJ valves are used for cooling control of the piston.

7. The engine lubrication system according to claim 1, characterized in that, The cylinder head lubricating oil passage includes a cylinder head intake side lubricating oil passage and a cylinder head exhaust side lubricating oil passage, and an inlet end of the cylinder head intake side lubricating oil passage and the cylinder head exhaust side lubricating oil passage are both communicated with the second port of the three-way valve.

8. The engine lubrication system according to claim 7, characterized in that, An outlet end of the cylinder head intake side lubricating oil passage is connected to a camshaft, a VVT and a high-pressure fuel pump on the cylinder head intake side.

9. The engine lubrication system according to claim 7, characterized in that, An outlet end of the cylinder head exhaust side lubricating oil passage is connected to a camshaft, a VVT and a high-pressure fuel pump on the cylinder head exhaust side.

10. A vehicle, characterized in that, Including the engine lubrication system according to any one of claims 1 to 9.

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