Engine lubrication oil supply system

Abstract

The utility model discloses an engine lubrication oil supply system, which belongs to the technical field of engines, and comprises an oil pan, a main oil supply pipeline connected between the oil pan and an engine main oil duct, and a pre-oil supply pipeline connected between the oil pan and the engine main oil duct, a first one-way valve is arranged on the main oil supply pipeline on the upstream of the intersection of the pre-oil supply pipeline and the main oil supply pipeline, when the pre-oil supply pump works, the first one-way valve is closed, pre-oil supply does not pass through the main oil supply pipeline and completely flows to an engine main oil duct, the pipeline volume between the pre-oil supply pump and the engine main oil duct during lubrication is reduced, and the lubrication efficiency is improved. And the oil quantity of pre-oil supply is effectively reduced, so that the time of pre-oil supply is shortened.

Description

Technical Field

[0001] The utility model belongs to the technical field of engines, and particularly relates to an engine lubricating oil supply system. Background Art

[0002] The engine lubricating system mainly consists of an oil pump, an oil pre-supply pump, an oil cooler, an oil filter, etc., which provides lubricating oil with sufficient pressure for the engine. The installation position of the oil pump on the engine is higher than the oil level in the oil pan. In the existing oil supply system, there is no one-way valve in front of the oil pump. When the engine stops, the oil above the oil level in the entire oil supply system will flow back to the oil pan, resulting in no oil in the pipeline, and the following problems will occur:

[0003] 1. The oil supply time of the pre-supply oil pump is relatively long. The pre-supply oil pump needs to fill the entire system pipeline with oil to build sufficient oil pressure so that the oil can flow to the lubrication points of the engine. The pre-supply oil volume is large and the time is long.

[0004] 2. The layout of the oil pump is restricted. The oil pump is a gear pump. When the engine starts, the rotational speed is low and the suction of the pump is small. If the engine stops for a long time, all the oil in the oil pump will flow back to the oil pan, and there is no oil between the gears in the oil pump, which cannot be effectively sealed, and the oil suction capacity of the pump is even worse. Especially when the oil pump is arranged at a high position, it may not be able to suck up oil. Content of the Utility Model

[0005] The technical problem to be solved by the utility model is: to provide an engine lubricating oil supply system, which can reduce the oil supply time of the pre-supply oil pump, reduce the waiting time before the engine starts, and at the same time improve the working reliability of the oil pump.

[0006] To solve the above technical problem, the technical solution of the utility model is:

[0007] An engine lubricating oil supply system includes an oil pan, a main oil supply pipeline connected between the oil pan and the engine main oil passage, and also includes a pre-oil supply pipeline connected between the oil pan and the engine main oil passage. A pre-supply oil pump is arranged on the pre-oil supply pipeline, and a first one-way valve is arranged on the main oil supply pipeline upstream of the intersection of the pre-oil supply pipeline and the main oil supply pipeline.

[0008] Further, an oil pump is arranged on the main oil supply pipeline. A diversion pipe is connected between the pre-oil supply pipeline and the main oil supply pipeline. One end of the diversion pipe is connected downstream of the oil pump, and the other end is connected downstream of the pre-supply oil pump.

[0009] Further, a second one-way valve is also arranged on the main oil supply pipeline, and the second one-way valve is located upstream of the oil pump.

[0010] Further, a third check valve is provided on the main oil supply pipeline. The third check valve is arranged downstream of the oil pump, and one end of the diversion pipe is connected in a converging manner between the oil pump and the third check valve.

[0011] Further, a fourth check valve is provided on the pre-oil supply pipeline. The fourth check valve is located downstream of the pre-oil supply pump, and the other end of the diversion pipe is connected in a converging manner downstream of the fourth check valve.

[0012] Further, a temperature regulating valve and a cooler are provided on the main oil supply pipeline. The temperature regulating valve and the cooler are arranged between the first check valve and the third check valve.

[0013] Further, the lubricating oil supply system further includes a standby oil supply pipeline. One end of the standby oil supply pipeline is connected to the oil sump, and the other end is connected in a converging manner to the main oil supply pipeline between the third check valve and the temperature regulating valve. A standby pump is provided on the standby oil supply pipeline.

[0014] Further, a fifth check valve is provided on the standby oil supply pipeline. The fifth check valve is located downstream of the standby pump.

[0015] Further, the pre-oil supply pump and the standby pump are electric oil pumps.

[0016] Further, an oil filter is also connected between the main oil supply pipeline and the pre-oil supply pipeline and the engine main oil gallery.

[0017] After adopting the above technical solution, the beneficial effects of the present utility model are as follows:

[0018] Since the engine lubricating oil supply system of the present utility model includes an oil sump and a main oil supply pipeline connected between the oil sump and the engine main oil gallery, and further includes a pre-oil supply pipeline connected between the oil sump and the engine main oil gallery. A pre-oil supply pump is provided on the pre-oil supply pipeline, and a first check valve is provided on the main oil supply pipeline upstream of the confluence of the pre-oil supply pipeline and the main oil supply pipeline. When the pre-oil supply pump works, the first check valve closes, and the pre-oil supply does not pass through the main oil supply pipeline and completely flows to the engine main oil gallery, reducing the pipeline volume between the pre-oil supply pump and the engine main oil gallery during lubrication, effectively reducing the amount of pre-oil supply, and thus reducing the pre-oil supply time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the engine lubricating oil supply system of the present utility model;

[0020] In the figure, 1 - oil pan, 2 - pre - oil supply pipeline, 3 - pre - oil supply pump, 4 - main oil supply pipeline, 5 - oil pump, 6 - drainage pipe, 7 - temperature regulating valve, 8 - cooler, 9 - standby oil supply pipeline, 10 - standby pump, 11 - oil filter, 12 - engine main oil passage, 13 - first check valve, 14 - second check valve, 15 - third check valve, 16 - fourth check valve, 17 - fifth check valve. Detailed implementation manners

[0021] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments. The preferred embodiments of the present utility model are shown in the drawings. The function of the drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but it should not be construed as a limitation on the protection scope of the present utility model.

[0022] As Figure 1 shown, an engine lubrication oil supply system includes an oil pan 1 and a main oil supply pipeline 4 connected between the oil pan 1 and the engine main oil passage 12. An oil filter 11 is also connected between the main oil supply pipeline 4 and the pre - oil supply pipeline 2 and the engine main oil passage 12 to filter the engine oil and prevent impurities in the engine oil from affecting the service life of the engine shafting. In one embodiment of the present application, the oil supply system further includes a pre - oil supply pipeline 2 connected between the oil pan 1 and the engine main oil passage 12. A pre - oil supply pump 3 is provided on the pre - oil supply pipeline 2, and a first check valve 13 is provided on the main oil supply pipeline 4 upstream of the intersection of the pre - oil supply pipeline 2 and the main oil supply pipeline 4.

[0023] Before the engine starts and after it stops, the pre - oil supply pump 3 works and the first check valve 13 closes. The pre - supplied oil cannot flow into the main oil supply pipeline 4 and can directly flow through the oil filter 11 to the engine main oil passage 12, ensuring pre - lubrication of the engine and cooling the engine shafting. The present application reduces the pipeline volume of the main oil supply pipeline 4 part, effectively reduces the amount of pre - supplied oil, and thus reduces the pre - oil supply time.

[0024] To reduce energy consumption, an oil pump 5 is provided on the main oil supply pipeline 4. After the engine starts, the oil pump 5 is driven by a gear to suck oil from the oil pan 1 to provide lubricating oil for the engine. To avoid the situation where the oil pump 5 is arranged at a relatively high position, the distance between it and the oil pan 1 is far, and the oil suction capacity of the oil pump 5 is insufficient. In another embodiment of the present application, a drainage pipe 6 is connected between the pre - oil supply pipeline 2 and the main oil supply pipeline 4. One end of the drainage pipe 6 is connected downstream of the oil pump 5, and the other end is connected downstream of the pre - oil supply pump 3. When the pre - oil supply pump 3 works, the pre - supplied oil will flow through the drainage pipe 6 to the oil pump 5, filling the oil pump 5 with engine oil. When the oil pump 5 rotates, the engine oil forms a seal inside the pump, greatly improving the oil suction capacity of the oil pump 5, thereby ensuring the normal operation of the oil pump 5.

[0025] Further, a second one-way valve 14 is also provided on the main oil supply pipeline 4. The second one-way valve 14 is located upstream of the oil pump 5. When the engine is not started, the second one-way valve 14 is closed, which can prevent the oil from flowing back from the oil suction port of the oil pump 5 to the oil sump 1, effectively reducing the flow of pre-supplied oil to the oil pump 5.

[0026] A third one-way valve 15 is also provided on the main oil supply pipeline 4. The third one-way valve 15 is arranged downstream of the oil pump 5. One end of the diversion pipe 6 is connected to the main pipeline between the oil pump 5 and the third one-way valve 15. When the pre-oil pump 3 is working, the second one-way valve 14 and the third one-way valve 15 are closed, so that the space between the second one-way valve 14 and the third one-way valve 15 is filled with oil, ensuring the reliability of the oil pump 5. The diversion pipe 6 is preferably a small-diameter pipeline. However, if the pipe diameter is too small, there is less oil in the oil pump 5, and an effective seal cannot be formed, and the increased suction force of the oil pump 5 is small. If the pipe diameter is too large, too much oil flows to the oil pump 5, which may open the third one-way valve 15, thereby reducing the flow of pre-oil directly into the oil filter 11 and increasing the pre-oil supply time. Therefore, the pipe diameter of the diversion pipe 6 needs to be reasonably matched.

[0027] Specifically, a fourth one-way valve 16 is also provided on the pre-oil supply pipeline 2. The fourth one-way valve 16 is located downstream of the pre-oil pump 3. The other end of the diversion pipe 6 is connected to the downstream of the fourth one-way valve 16. When the oil pump 5 is working, the fourth one-way valve 16 is closed, which can prevent the oil from flowing back from the pre-oil pump 3 to the oil sump 1.

[0028] A temperature regulating valve 7 and a cooler 8 are also provided on the main oil supply pipeline 4. The temperature regulating valve 7 and the cooler 8 are arranged between the first one-way valve 13 and the third one-way valve 15. The temperature regulating valve 7 controls the opening degree of the bypass flowing to the cooler 8 according to the temperature of the oil sucked by the oil pump 5, so as to control the temperature of the oil finally flowing into the main oil passage 12 of the engine.

[0029] Another embodiment of the present application is that the oil supply system further includes a standby oil supply pipeline 9. One end of the standby oil supply pipeline 9 is connected to the oil sump 1, and the other end is connected to the main oil supply pipeline 4 between the third one-way valve 15 and the temperature regulating valve 7. A standby pump 10 is provided on the standby oil supply pipeline 9. A fifth one-way valve 17 is also provided on the standby oil supply pipeline 9. The fifth one-way valve 17 is located downstream of the standby pump 10. When the oil pump 5 is working normally, the standby pump 10 does not start, and the fifth one-way valve 17 is closed. When the oil pump 5 fails, the standby pump 10 is started, the fifth one-way valve 17 is opened, the third one-way valve 15 and the fourth one-way valve 16 are closed, and the oil flows through the standby pump 10, the temperature regulating valve 7, the cooler 8, and the oil filter 11 to the main oil passage 12 of the engine to provide lubricating oil for the engine.

[0030] Among them, the pre-feed oil pump 3 and the standby pump 10 are both electric oil pumps. The pre-feed oil pump 3 has a smaller power and flow rate compared to the oil pump 5, while the standby pump 10, as a backup solution for the oil pump 5, has a larger flow rate compared to the pre-feed oil pump 3 and is comparable to the oil pump 5.

[0031] In the engine lubrication oil supply system of the present utility model, the outlet of the pre-feed oil pump is directly connected to the main oil passage of the engine. A first one-way valve is provided on the main oil supply pipeline upstream of the intersection of the pre-feed oil pipeline and the main oil supply pipeline. When the pre-feed oil pump is working, the first one-way valve is closed, and the pre-feed oil does not pass through the main oil supply pipeline and completely flows to the main oil passage of the engine, reducing the pipeline volume between the pre-feed oil pump and the main oil passage of the engine during lubrication, effectively reducing the amount of pre-feed oil, and thus reducing the pre-feed time.

[0032] In the description of this specification, unless otherwise clearly defined, words such as "set", "installed", "connected", etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0033] Although the specific embodiments of the present utility model are described above, those skilled in the art should understand that the described embodiments are only a part of the embodiments of the present utility model, not all of them. These are only illustrative examples, and the protection scope of the present utility model is defined by the claims. Without departing from the principles and essence of the present utility model and without any creative work, those skilled in the art can make various changes or modifications to these embodiments, but these changes and modifications all fall within the protection scope of the present utility model.

Claims

1. An engine lubrication oil supply system, comprising an oil pan, and a main oil supply pipeline connected between the oil pan and the main oil channel of the engine, characterized in that: It also includes a pre-oil supply pipeline connected between the oil pan and the main oil channel of the engine, a pre-oil supply pump is arranged on the pre-oil supply pipeline, and a first one-way valve is arranged on the main oil supply pipeline upstream of the intersection of the pre-oil supply pipeline and the main oil supply pipeline.

2. The engine lubrication oil supply system according to claim 1, characterized in that: An oil pump is arranged on the main oil supply pipeline, a drainage pipe is connected between the pre-oil supply pipeline and the main oil supply pipeline, one end of the drainage pipe is connected to the downstream of the oil pump, and the other end is connected to the downstream of the pre-oil supply pump.

3. The engine lubrication oil supply system according to claim 2, characterized in that: The main oil supply pipeline is also provided with a second one-way valve, and the second one-way valve is located upstream of the oil pump.

4. The engine lubrication oil supply system according to claim 3, characterized in that: A third one-way valve is also provided on the main oil supply pipeline. The third one-way valve is provided downstream of the oil pump. One end of the drainage pipe is connected between the oil pump and the third one-way valve.

5. The engine lubrication oil supply system according to claim 3, characterized in that: A fourth one-way valve is also provided on the pre-oil supply pipeline. The fourth one-way valve is located downstream of the pre-oil supply pump. The other end of the drainage pipe is connected to the downstream of the fourth one-way valve.

6. The engine lubrication oil supply system according to claim 4, characterized in that: The main oil supply pipeline is also provided with a temperature regulating valve and a cooler, and the temperature regulating valve and the cooler are arranged between the first one-way valve and the third one-way valve.

7. The engine lubrication oil supply system according to claim 6, characterized in that: The lubricating oil supply system also includes a backup oil supply pipeline, one end of which is connected to the oil pan and the other end of which is connected to the main oil supply pipeline between the third one-way valve and the temperature regulating valve. A backup pump is provided on the backup oil supply pipeline.

8. The engine lubrication oil supply system according to claim 7, characterized in that: The standby oil supply pipeline is also provided with a fifth one-way valve, and the fifth one-way valve is located downstream of the standby pump.

9. The engine lubrication oil supply system according to claim 7, characterized in that: The pre-supply oil pump and the standby pump are electric oil pumps.

10. The engine lubrication oil supply system according to any one of claims 1 to 9, characterized in that: An oil filter is also connected between the main oil supply pipeline, the pre-oil supply pipeline and the main oil channel of the engine.

Images