CN113417712A - Lubricating system of engine and engine - Google Patents
Lubricating system of engine and engine Download PDFInfo
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- CN113417712A CN113417712A CN202110858145.5A CN202110858145A CN113417712A CN 113417712 A CN113417712 A CN 113417712A CN 202110858145 A CN202110858145 A CN 202110858145A CN 113417712 A CN113417712 A CN 113417712A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/16—Controlling lubricant pressure or quantity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/02—Pressure lubrication using lubricating pumps
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- General Engineering & Computer Science (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
The disclosure provides a lubricating system of an engine and the engine, and belongs to the field of automobiles. The lubricating system of the engine comprises an oil pump, a main oil duct and a feedback oil duct; the oil pump is a whole-course variable-displacement oil pump, and an oil inlet of the oil pump is communicated with an oil pan of the engine; an oil inlet of the main oil duct is communicated with an oil outlet of the oil pump, and an oil outlet of the main oil duct is used for being communicated with a lubricating cavity of the engine; the first end of the feedback oil duct is communicated with the main oil duct, and the second end of the feedback oil duct is communicated with the induction end of the oil pump; the oil pump is configured to adjust the oil pressure at an oil outlet of the oil pump according to the oil pressure fed back by the feedback oil passage. This disclosure can realize the real-time adjustment of the lubricating system's of engine oil pressure through the lubricating system of engine.
Description
Technical Field
The disclosure belongs to the field of automobiles, and particularly relates to a lubricating system of an engine and the engine.
Background
The lubricating system of engine is mainly used for conveying a certain quantity of clean lubricating oil to the surfaces of the parts which move relatively so as to realize liquid friction, reduce frictional resistance, reduce the abrasion of parts and clean and cool the surfaces of the parts.
In the related art, a lubricating system of an engine includes an oil pump and a main oil gallery, and the oil pump sucks lubricating oil from an oil pan, filters the lubricating oil through an oil filter, and then conveys the lubricating oil to the main oil gallery disposed on a cylinder block of the engine, and conveys the lubricating oil to each part to be lubricated through the main oil gallery. Since the engine speed is positively correlated with the output pressure of the oil pump, the output oil pressure may exceed the required pressure range of normal lubricating oil when the engine speed is high. In order to avoid the problems, a mechanical pressure relief valve is arranged in an outlet pipeline of the engine oil pump, when the output pressure is higher than the pressure range, the pressure relief valve is opened, and lubricating oil can flow into a low-pressure oil pan through the pressure relief valve to reduce the pressure.
However, when the relief valve is used, if the problem of sticking occurs, the lubricating oil will continuously flow into the oil pan, so that the pressure of the lubricating oil is continuously reduced, and finally, the engine is lack of lubrication, so that serious faults such as bush burning and cylinder pulling occur.
Disclosure of Invention
The embodiment of the disclosure provides a lubricating system of an engine, which can realize real-time adjustment of oil pressure of the lubricating system of the engine. The technical scheme is as follows:
the embodiment of the disclosure provides a lubricating system of an engine, which comprises an oil pump, a main oil gallery and a feedback oil gallery;
the oil pump is a whole-course variable-displacement oil pump, and an oil inlet of the oil pump is communicated with an oil pan of the engine;
an oil inlet of the main oil duct is communicated with an oil outlet of the oil pump, and an oil outlet of the main oil duct is used for being communicated with a lubricating cavity of the engine;
the first end of the feedback oil duct is communicated with the main oil duct, and the second end of the feedback oil duct is communicated with the induction end of the oil pump;
the oil pump is configured to adjust the oil pressure at an oil outlet of the oil pump according to the oil pressure fed back by the feedback oil passage.
In yet another implementation of the present disclosure, the main oil gallery includes a first main oil gallery, a second main oil gallery, and a third main oil gallery;
the first end of the first main oil gallery is communicated with an oil outlet of the oil pump;
a first end of the second main oil gallery is communicated with a second end of the first main oil gallery, and the second end of the second main oil gallery is used for being communicated with a crankshaft lubrication cavity of the engine;
the first end of the third main oil gallery is communicated with the second main oil gallery, the second end of the third main oil gallery is used for being communicated with a camshaft lubrication cavity of the engine, and the feedback oil gallery is communicated with the second end of the third main oil gallery.
In yet another implementation of the present disclosure, the main oil gallery further includes a crankshaft oil gallery; the crankshaft oil passage is communicated with a second end of the third main oil passage, and the crankshaft oil passage is used for being communicated with a crankshaft lubricating cavity of the engine.
In yet another implementation of the present disclosure, the main oil gallery further includes a connecting oil gallery and a camshaft oil gallery; the first end of the connecting oil duct is communicated with the second end of the second main oil duct, and the second end of the connecting oil duct is communicated with the camshaft oil duct;
the extension direction of the camshaft oil duct is the same as that of the crankshaft oil duct, and the camshaft oil duct is used for being communicated with a camshaft lubricating cavity of the engine.
In yet another implementation manner of the present disclosure, the system further comprises a mechanical filter module; an oil inlet of the mechanical filter module is communicated with the first end of the first main oil duct, and an oil outlet of the mechanical filter module is communicated with the first end of the second main oil duct.
In yet another implementation of the present disclosure, the system further comprises an oil return channel; the first end of oil return passage be used for with the lubrication chamber intercommunication of engine, the second end of oil return passage be used for with the oil pan intercommunication of engine.
In yet another implementation of the present disclosure, the oil return passage includes at least one first oil return section, at least one second oil return section, and a plurality of third oil return sections;
an included angle between the extending direction of the first oil return section and the horizontal plane is smaller than 90 degrees, and the first oil return section is used for being communicated with a camshaft lubricating cavity of the engine;
the second oil return section is arranged corresponding to the first oil return section, a first end of the second oil return section is communicated with the corresponding first oil return section, an included angle is formed between the second oil return section and the corresponding first oil return section, and a second end of the second oil return section is used for being communicated with an oil pan of the engine;
a plurality of the third oil return section with the second oil return section is parallel interval arrangement each other, just the first end of third oil return section be used for with the camshaft lubrication chamber intercommunication of engine, the second end of third oil return section be used for with the oil pan intercommunication of engine.
In yet another implementation of the present disclosure, the second oil return section has a first diameter-changing section in the middle; the inner diameter of the middle part of the first variable diameter section is larger than the inner diameters of the two ends.
In yet another implementation of the present disclosure, the third oil return section has a second diameter-changing section in the middle; the inner diameter of the middle part of the second variable-diameter section is larger than the inner diameters of the two ends.
In yet another implementation of the present disclosure, an embodiment of the present disclosure further provides an engine, which includes a cylinder block, a cylinder head, an oil pan, and the above-mentioned lubricating system of the engine; the inside of the cylinder body is provided with a crankshaft lubricating cavity; the cylinder cover is arranged at the top of the cylinder body in a sealing cover mode, a camshaft lubricating cavity is formed in the cylinder cover, and the oil pan is connected with the bottom of the cylinder body;
the lubricating system with the cylinder body with the lateral wall of cylinder cap is connected, just lubricating system with the lubricated chamber of camshaft with the lubricated chamber intercommunication of bent axle.
The technical scheme provided by the embodiment of the disclosure has the following beneficial effects:
when a lubricating system of an engine works, lubricating oil flows from an oil inlet to an oil outlet of a main oil duct and is conveyed to lubricating cavities (a crankshaft lubricating cavity, a camshaft lubricating cavity and the like) in the engine. The feedback oil duct is communicated with the main oil duct, so that the oil pressure in the feedback oil duct is the same as the oil pressure in the main oil duct, and the sensing end of the oil pump can sense the oil pressure in the main oil duct through the feedback oil duct, so that the oil pressure of an oil outlet of the oil pump is adjusted according to the oil pressure fed back by the feedback oil duct, the lubricating oil can meet the actual required oil pressure, and the real-time adjustment of the oil pressure of a lubricating system of the engine is realized.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a schematic block diagram of a lubrication system of an engine provided in an embodiment of the present disclosure;
FIG. 2 is a schematic block diagram of an engine provided by an embodiment of the present disclosure;
FIG. 3 is a schematic structural diagram of a cylinder head of an engine provided by an embodiment of the disclosure.
The symbols in the drawings represent the following meanings:
1. an oil pump;
2. a main oil gallery; 21. a first main oil gallery; 22. a second main oil gallery; 23. a third main oil gallery; 24. a crankshaft oil gallery; 241. a crankshaft oil outlet pipe; 25. connecting the oil duct; 26. a camshaft oil passage; 261. an intake side camshaft oil passage; 262. an exhaust-side camshaft oil passage; 2611. an oil outlet pipe of the camshaft at the air inlet side; 2612. an oil outlet plate of the camshaft at the air inlet side; 27. a supercharger oil gallery; 28. a timing chain oil passage;
3. a feedback oil passage;
4. an oil return passage; 41. a first oil return section; 42. a second oil return section; 421. a first variable diameter section; 43. a third oil return section; 431. a second variable diameter section;
5. a machine filter module;
100. a cylinder body; 200. a cylinder cover; 2001. a first cover body; 2002. a second cover body.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
The embodiment of the disclosure provides a lubricating system of an engine, which comprises an oil pump 1, a main oil gallery 2 and a feedback oil gallery 3, as shown in fig. 1. The oil pump 1 is a whole-course variable-displacement oil pump, and an oil inlet of the oil pump 1 is communicated with an oil pan of an engine. An oil inlet of the main oil gallery 2 is communicated with an oil outlet of the oil pump 1, and an oil outlet of the main oil gallery 2 is communicated with a lubricating cavity of the engine. The first end of the feedback oil duct 3 is communicated with the main oil duct 2, and the second end of the feedback oil duct 3 is communicated with the induction end of the oil pump 1. The oil pump 1 is configured to adjust an oil pressure at an oil outlet of the oil pump 1 in accordance with the oil pressure fed back by the feedback oil passage 3.
When the lubricating system of the engine works, lubricating oil flows from the oil inlet to the oil outlet of the main oil gallery 2, and is conveyed to lubricating cavities (a crankshaft lubricating cavity, a camshaft lubricating cavity and the like) in the engine. Because the feedback oil duct 3 is communicated with the main oil duct 2, the oil pressure in the feedback oil duct 3 is the same as the oil pressure in the main oil duct 2, and the sensing end of the oil pump 1 can sense the oil pressure in the main oil duct 2 through the feedback oil duct 3, so that the oil pressure of the oil outlet of the oil pump 1 is adjusted according to the oil pressure fed back by the feedback oil duct 3, the lubricating oil can meet the oil pressure required in practice, and the real-time adjustment of the oil pressure of a lubricating system of an engine is realized.
In the embodiment of the present disclosure, the oil pump 1 may be mounted on an outer side wall of a cylinder of an engine, so as to ensure stability of the oil pump 1, and meanwhile, the oil pump 1 is closer to the cylinder of the engine. Because the oil inlet of the main oil gallery 2 is communicated with the oil outlet of the oil pump 1, the length of the main oil gallery 2 can be reduced, and therefore the volume of a lubricating system of the whole engine is reduced, and the volume of the engine is reduced.
Alternatively, the main oil gallery 2 includes a first main oil gallery 21, a second main oil gallery 22, and a third main oil gallery 23. A first end of the first main gallery 21 communicates with an oil outlet of the oil pump 1.
A first end of the second main oil gallery 22 communicates with a second end of the first main oil gallery 21, and a second end of the second main oil gallery 22 is adapted to communicate with a crankshaft lubrication chamber of the engine. A first end of the third main oil gallery 23 is in communication with the second main oil gallery 22, a second end of the third main oil gallery 23 is for communication with a camshaft lubrication chamber of the engine, and the feedback oil gallery 3 is in communication with a second end of the third main oil gallery 23.
In the disclosed embodiment, the first main gallery 21 communicates with an oil outlet of the oil pump 1, and the first main gallery 21 is used to output lubricating oil. The second main oil gallery 22 is used to deliver lubricating oil to a camshaft lubrication cavity in the engine for lubricating a camshaft in the engine, and the third main oil gallery 23 is used to deliver lubricating oil to a crankshaft lubrication cavity for lubricating a crankshaft in the engine.
The lubricating oil flows from the first end to the second end of the third main oil gallery 23, delivering the lubricating oil to the crankshaft in the engine. Since there is friction between the oil and the oil passages during the flow of the oil, the oil pressure of the oil is reduced during the flow, i.e., the oil pressure of the oil at the second end of the third main oil gallery 23 is smaller than the oil pressure of the first main oil gallery 21. The feedback oil duct 3 is communicated with the second end of the third main oil duct 23, so that the lubricating oil at the second end of the third main oil duct 23 can be conveyed to the sensing end of the oil pump 1 through the feedback oil duct 3, the sensing end of the oil pump 1 senses the oil pressure at the second end of the third main oil duct 23, the oil pressure of the oil outlet of the oil pump 1 is controlled, pressure is provided for the lubricating oil, the lubricating oil can flow to the second end of the third main oil duct 23, all parts of the crankshaft are lubricated, and the real-time adjustment of the oil pressure of a lubricating system of the engine is realized.
When the sensing end of the oil pump 1 detects that the oil pressure at the second end of the third main oil gallery 23 is low, the oil pressure at the oil outlet of the oil pump 1 can be increased, so that the oil pressure of the lubricating oil is increased. When the sensing end of the oil pump 1 detects that the oil pressure at the second end of the third main oil gallery 23 is large, the oil pressure at the oil outlet of the oil pump 1 can be reduced, so that the oil pressure of the lubricating oil is reduced.
In the embodiment of the present disclosure, the oil pump 1 may also be a two-stage variable displacement oil pump, and the two-stage variable displacement oil pump has a sensing end and a control end, and the sensing end mainly receives the oil pressure from the feedback oil passage 3 and is used for sensing the pressure. The control end is used for controlling the pressure of the oil outlet of the oil pump 1 according to the pressure sensed by the sensing end. That is to say, the oil pump 1 is a two-stage variable displacement oil pump, so that the oil pressure of the lubricating oil of the lubricating system can be effectively adjusted according to the oil pressure sensed by the sensing end, the additional pressure loss of the oil pressure is reduced, and the sensitivity of the pressure of the output lubricating oil of the oil pump 1 to the oil pressure by the rotating speed and the temperature of the engine is avoided, so that the oil pressure control is more accurate, and the oil consumption saving is more remarkable. Through the preliminary estimation of the oil consumption of the lubricating system of the engine provided by the embodiment of the disclosure, the oil consumption of the lubricating system of the engine is saved by not less than 1%.
Optionally, the main oil gallery 2 further includes a crankshaft oil gallery 24, the crankshaft oil gallery 24 is communicated with a second end of the third main oil gallery 23, the crankshaft oil gallery 24 extends in the same axial direction as the crankshaft of the engine, and the crankshaft oil gallery 24 is used for communicating with a crankshaft lubrication cavity of the engine.
In the embodiment of the present disclosure, the side wall of the crankshaft oil passage 24 has a plurality of crankshaft oil outlet pipes 241 communicated with the inner cavity of the crankshaft oil passage 24, and the lubricating oil in the crankshaft oil passage 24 is communicated with the crankshaft lubricating oil through the crankshaft oil outlet pipes 241 so as to lubricate the crankshaft.
Illustratively, the plurality of crankshaft oil outlet pipes 241 are uniformly spaced on the side wall of the crankshaft oil passage 24, so that the lubricating oil can uniformly enter the same crankshaft through hole.
In the present embodiment, the side wall of the crankshaft oil passage 24 has an orifice, and the crankshaft oil passage 24 communicates with the crankshaft oil outlet pipe 241 through the orifice.
Optionally, an arc-shaped crankshaft shaft diameter (not shown) is connected to the crankshaft oil outlet pipe 241, and each crankshaft shaft diameter is provided with a channel for flowing lubricating oil, and the crankshaft shaft diameter conveys the lubricating oil to a crankshaft main journal of the crankshaft, so that the friction between the crankshaft main journal and a bearing bush is reduced in the rotation process of the crankshaft.
The side wall of the crankshaft oil passage 24 is provided with a plurality of oil nozzle oil outlet pipes (not shown in the figure) communicated with the inner cavity of the crankshaft oil passage 24, and the plurality of crankshaft oil outlet pipes 241 and the plurality of oil nozzle oil outlet pipes can be uniformly arranged at intervals. The lubricating oil in the crankshaft oil passage 24 is delivered to the oil jet through the oil jet outlet pipe to cool the piston inside the cylinder block 100 with the injected lubricating oil.
Because lubricating oil not only has lubricated effect, has the effect of cooling equally, spout the lubricating oil through the fuel sprayer play oil pipe and spray on the piston, can make the temperature of piston reduce like this, avoid the high temperature to cause the damage of piston that the engine knocks and arouses.
Optionally, the main oil gallery 2 further includes a connecting oil gallery 25 and a camshaft oil gallery 26. A first end of the connecting oil passage 25 communicates with a second end of the second main oil passage 22, and a second end of the connecting oil passage 25 communicates with the camshaft oil passage 26. The extension direction of the camshaft oil passage 26 is the same as that of the crankshaft oil passage 24, and the camshaft oil passage 26 is arranged perpendicular to the connecting oil passage 25. The camshaft oil passage 26 is for communication with a camshaft lubrication cavity of the engine.
In the above-described implementation, the connecting oil passage 25 is used to introduce the lubricating oil from the second main oil passage 22 into the camshaft oil passage 26, and the camshaft oil passage 26 is used to lubricate the camshaft of the engine.
In practical use, lubricating oil enters the oil pump 1 through an oil inlet of the oil pump 1, the oil pump 1 outputs the lubricating oil to the first main oil gallery 21 through an oil outlet of the oil pump 1, and the lubricating oil enters the second main oil gallery 22 through the first main oil gallery 21 and then enters the camshaft oil gallery 26 through the connecting oil gallery 25. The lubricating oil flows into the outer wall of the camshaft through the camshaft oil passage 26, lubricating the camshaft.
In the present embodiment, the connecting oil passage 25 is arranged in the cylinder head of the engine. Because the camshaft oil duct 26 is arranged perpendicularly to the connecting oil duct 25, that is, the extending direction of the connecting oil duct 25 is perpendicular to the extending direction of the camshaft oil duct 26, the length of the connecting oil duct 25 is shortest, the volume occupied by the connecting oil duct 25 in the cylinder cover is reduced, the cylinder cover is made smaller, and the volume of the whole engine is reduced.
Alternatively, the number of camshaft oil passages 26 is 2. One camshaft oil passage 26 is located on the intake side of the engine and may be referred to as an intake-side camshaft oil passage 261, and one camshaft oil passage 26 is located on the exhaust side of the engine and may be referred to as an exhaust-side camshaft oil passage 262. Intake side camshaft oil passage 261 feeds lubricating oil to the intake side camshaft lubrication cavity to lubricate the intake side camshaft. The exhaust side camshaft oil passage 262 supplies the lubricating oil to the exhaust side camshaft lubricating chamber to lubricate the exhaust side camshaft.
In the present embodiment, intake side camshaft oil passage 261 has the same structure as exhaust side camshaft oil passage 262, and the intake side camshaft oil passage 261 will be briefly described here as an example.
Optionally, the sidewall of the intake side camshaft oil passage 261 is provided with a plurality of intake side camshaft oil outlet pipes 2611 communicated with the inner cavity of the intake side camshaft oil passage 261, and the lubricating oil in the intake side camshaft oil passage 261 lubricates the intake side camshaft through the intake side camshaft oil outlet pipes 2611.
Optionally, an arc-shaped intake-side camshaft oil outlet plate 2612 is further connected to the intake-side camshaft oil outlet pipe 2611, and the intake-side camshaft oil outlet plate 2612 conveys lubricating oil to the side wall of the intake-side camshaft, so that in the rotating process of the intake-side camshaft, the friction force between the intake-side camshaft and the intake-side camshaft through hole is reduced.
Optionally, the main oil gallery 2 further includes a supercharger oil gallery 27, a first end of the supercharger oil gallery 27 being in communication with the second main oil gallery 22, and a second end of the supercharger oil gallery 27 being in communication with the supercharger lubrication cavity.
In the above implementation, the lubricating oil in the second main oil gallery 22 flows through the supercharger oil gallery 27 to the turbocharger of the engine, providing lubrication to the turbocharger. The supercharger oil passage 27 is arranged, and the difficulty in arrangement of oil passages in the later period is reduced.
In the disclosed embodiment, the booster oil gallery 27 may be sealed by a bowl plug or a plug process when not in use.
Referring again to fig. 1, the main oil gallery 2 further includes a timing chain oil gallery 28, and the timing chain oil gallery 28 communicates with an inner cavity of the third main oil gallery 23. The lubricating oil is conveyed to the timing chain lubricating cavity through the timing chain oil passage 28, the timing chain is lubricated, and the stable operation of the timing chain is ensured. The timing chain oil passage 28 is directly connected with the inner cavity of the third main oil passage 23 instead of being led out independently, so that the problem of blocking the oil passage at the position is solved, the number of parts is reduced, and the cost is saved.
Optionally, the lubrication system of the engine further comprises an oil return channel 4. A first end of the oil return channel 4 is adapted to communicate with a lubrication chamber of the engine and a second end of the oil return channel 4 is adapted to communicate with an oil sump of the engine.
The oil return channel 4 enables lubricating oil accumulated in the lubricating cavity in the cylinder cover 200 to quickly return to the oil pan, and the recovery efficiency of the engine oil in the cylinder cover 200 is improved.
Optionally, the oil return channel 4 comprises at least one first oil return section 41, at least one second oil return section 42 and a plurality of third oil return sections 43.
An included angle between the extending direction of the first oil return section 41 and the horizontal plane is smaller than 90 degrees, and the first oil return section 41 is used for being communicated with a camshaft lubrication cavity of an engine. The second oil return section 42 is arranged corresponding to the first oil return section 41, a first end of the second oil return section 42 is communicated with the corresponding first oil return section 41, the second oil return section 42 is arranged perpendicular to the corresponding first oil return section 41, and a second end of the second oil return section 42 is used for being communicated with an oil pan of the engine. The plurality of third oil return sections 43 and the second oil return sections 42 are arranged in parallel and at intervals, and a first end of the third oil return section 43 is used for communicating with a camshaft lubrication cavity of the engine, and a second end of the third oil return section 43 is used for communicating with an oil pan of the engine.
The oil return passage 4 is designed into a first oil return section 41, a second oil return section 42 and a third oil return section 43, so that a buffer structure can be formed through the first oil return section 41, the splashing effect of lubricating oil on the liquid level of the oil pan is effectively reduced, and the gas content of the lubricating oil in the engine is further reduced.
Illustratively, in order to improve the buffering effect, the first oil returning section 41 is arranged in parallel with the horizontal plane.
Optionally, the middle of the second oil return section 42 has a first reducer section 421. The inner diameter of the middle portion of the first variable diameter section 421 is larger than the inner diameters of both ends.
Since the inner diameter of the middle part of the first reducing section 421 is larger than the inner diameters of the two ends, the flowing speed of the lubricating oil in the second oil return section 42 can be effectively reduced, so that the splashing effect of the lubricating oil on the liquid level of the oil pan can be further reduced.
In this embodiment, in order to improve the smooth flowing of the lubricating oil along the oil return passage 4, the inner diameter of the first variable diameter section 421 gradually increases along the axis thereof and then gradually decreases.
Optionally, the middle of the third oil return section 43 has a second variable diameter section, and the inner diameter of the middle of the second variable diameter section 431 is larger than that of the two ends.
Since the inner diameter of the middle portion of the second reducing section 431 is larger than the inner diameters of the two ends, the flow speed of the lubricating oil in the third oil return section 43 can be effectively reduced, so that the splashing effect of the lubricating oil on the liquid level of the oil pan can be further reduced.
In this embodiment, in order to improve the smooth flowing of the lubricating oil along the oil return passage 4, the inner diameter of the first variable diameter section 421 gradually increases along the axis thereof and then gradually decreases. The inner diameter of the second variable diameter section 431 gradually increases and then gradually decreases along the axis thereof.
In this embodiment, in order to improve the machining efficiency of the oil return passage 4, the second oil return section 42 and the third oil return section 43 have the same structure.
Optionally, the lubrication system of the engine further comprises a filter module 5. Optionally, an oil inlet of the machine filter module 5 is communicated with the first end of the first main oil gallery 21, and an oil outlet of the machine filter module 5 is communicated with the first end of the second main oil gallery 22.
In the above implementation manner, the machine filter module 5 is configured to cool and filter the lubricating oil, an oil inlet of the machine filter module 5 is communicated with the first main oil gallery 21, and an oil outlet of the machine filter module 5 is communicated with the first end of the second main oil gallery 22, so that the lubricating oil delivered by the oil pump 1 can be cooled and filtered by the machine filter module 5, and then delivered to the second main oil gallery 22 and the third main oil gallery 23, thereby preventing impurities in the lubricating oil from blocking a lubricating cavity of the engine.
Illustratively, the oil filter module 5 is a component formed by integrating an oil cooler and an oil filter, and the lubricating system of the engine provided by the embodiment of the disclosure eliminates the traditional oil filter connecting seat and the bolt attached to the oil filter connecting seat, and directly integrates the oil cooler and the oil filter, thereby not only effectively reducing the cost of the engine, but also enabling the arrangement of the engine to be more compact.
Illustratively, a third oil return section 43 close to the mechanical filter module 5 is communicated with the oil discharge port of the mechanical filter module 5, so that dirty oil in the mechanical filter module 5 can be discharged in time, and clean lubricating oil is kept inside the mechanical filter module 5.
Of course, under normal working conditions, a third oil return section 43 close to the machine filter module 5 is in a blocking state with the oil inlet of the machine filter module 5, and only when the machine filter module 5 discharges oil, the third oil return section 43 is in a communicating state with the oil inlet of the machine filter module 5.
The lubricating system of the engine provided by the embodiment of the present disclosure further includes a collector (not shown in the figure), the collector is used for collecting the lubricating oil in the oil pan, and the collector is communicated with the oil inlet of the oil pump 1, and the oil pump 1 outputs the lubricating oil flowing to the oil pan to lubricate again, so that the lubricating system of the engine forms a circulating system.
In the disclosed embodiment, the accumulator may be integrated on the oil pump 1, reducing the volume of the lubrication system of the engine.
In the embodiment, the oil passages are all realized in a casting mode, so that the difficulty in machining the oil passages can be reduced, and the cost of the engine is reduced.
Fig. 2 is a schematic structural diagram of a cylinder block of an engine provided in an embodiment of the present disclosure, fig. 3 is a schematic structural diagram of a cylinder head of an engine provided in an embodiment of the present disclosure, and in combination with fig. 2 and 3, an engine is further provided, and the engine includes a cylinder block 100, a cylinder head 200, an oil pan, and the above-mentioned lubricating system. The cylinder block 100 has a crankshaft lubrication chamber therein. The cylinder head 200 is hermetically covered on the top of the cylinder block 100. The cylinder cap 200 has a camshaft lubrication chamber therein, and the camshaft lubrication chamber is used for arranging a camshaft. The oil pan is connected to the bottom of the cylinder block 100. The lubrication system is connected with the side walls of the cylinder block 100 and the cylinder head 200. The lubricating system is communicated with the camshaft lubricating cavity and the crankshaft lubricating cavity.
The crankshaft lubrication cavity is used for arranging a crankshaft, a power unit of the engine drives the crankshaft to rotate, and other accessories on the engine are driven to work through the crankshaft. The camshaft functions to control the opening and closing action of the valves. The camshaft rotates smoothly in the engine, and normal operation of the engine can be guaranteed. And lubricating oil is conveyed to the camshaft through the intake side camshaft oil passage and the exhaust side camshaft oil passage, so that the camshaft can smoothly rotate.
Optionally, the cylinder head 200 includes a first cover 2001 and a second cover 2002. The first cover 2001 is connected to the top of the cylinder block 100, the second cover 2002 covers the first cover 2001, and the camshaft oil passage 26 is located on the second cover 2002. The connection oil passage 25 is located on the first cover 2001.
The cylinder cover 200 is divided into 2 parts, so that the lubricating part of the main journal of the camshaft can be designed on the second cover body 2002, and the lubricating parts of other parts are designed on the second cover body 2002, so that the oil passage is conveniently arranged, and the overall arrangement space of the engine is effectively reduced.
Illustratively, the engine in the embodiment of the present disclosure is a four-cylinder engine, that is, the engine includes four cylinder chambers, and gas is combusted in the four cylinder chambers to convert chemical energy into mechanical energy to drive the engine to operate.
The above description is intended to be exemplary only and not to limit the present disclosure, and any modification, equivalent replacement, or improvement made without departing from the spirit and scope of the present disclosure is to be considered as the same as the present disclosure.
Claims (10)
1. A lubrication system of an engine, characterized in that the lubrication system comprises an oil pump (1), a main oil gallery (2) and a feedback oil gallery (3);
the oil pump (1) is a whole-course variable-displacement oil pump, and an oil inlet of the oil pump (1) is communicated with an oil pan of the engine;
an oil inlet of the main oil gallery (2) is communicated with an oil outlet of the oil pump (1), and an oil outlet of the main oil gallery (2) is communicated with a lubricating cavity of the engine;
the first end of the feedback oil duct (3) is communicated with the main oil duct (2), and the second end of the feedback oil duct (3) is communicated with the induction end of the oil pump (1);
the oil pump (1) is configured to adjust the oil pressure of an oil outlet of the oil pump (1) according to the oil pressure fed back by the feedback oil passage (3).
2. The lubrication system of an engine according to claim 1, wherein the main oil gallery (2) includes a first main oil gallery (21), a second main oil gallery (22), and a third main oil gallery (23);
the first end of the first main oil gallery (21) is communicated with an oil outlet of the oil pump (1);
a first end of the second main oil gallery (22) is communicated with a second end of the first main oil gallery (21), and a second end of the second main oil gallery (22) is used for being communicated with a crankshaft lubrication cavity of the engine;
the first end of the third main oil gallery (23) is communicated with the second main oil gallery (22), the second end of the third main oil gallery (23) is used for being communicated with a camshaft lubricating cavity of the engine, and the feedback oil gallery (3) is communicated with the second end of the third main oil gallery (23).
3. The lubrication system of an engine according to claim 2, wherein the main oil gallery (2) further includes a crank oil gallery (24);
the crankshaft oil passage (24) is communicated with the second end of the third main oil passage (23), and the crankshaft oil passage (24) is used for being communicated with a crankshaft lubricating cavity of the engine.
4. The lubrication system of an engine according to claim 3, wherein the main oil gallery (2) further includes a connecting oil gallery (25) and a camshaft oil gallery (26);
a first end of the connecting oil passage (25) is communicated with a second end of the second main oil passage (22), and a second end of the connecting oil passage (25) is communicated with the camshaft oil passage (26);
the extension direction of the camshaft oil passage (26) is the same as that of the crankshaft oil passage (24), and the camshaft oil passage (26) is used for being communicated with a camshaft lubricating cavity of the engine.
5. The lubrication system of an engine according to claim 2, further comprising a filter module (5);
an oil inlet of the machine filter module (5) is communicated with the first end of the first main oil duct (21), and an oil outlet of the machine filter module (5) is communicated with the first end of the second main oil duct (22).
6. Lubrication system of an engine according to any of claims 1-5, further comprising an oil return channel (4);
the first end of oil return passageway (4) be used for with the lubrication chamber intercommunication of engine, the second end of oil return passageway (4) be used for with the oil pan intercommunication of engine.
7. Lubrication system of an engine according to claim 6, characterised in that the oil return channel (4) comprises at least one first oil return section (41), at least one second oil return section (42) and a plurality of third oil return sections (43);
an included angle between the extending direction of the first oil return section (41) and the horizontal plane is smaller than 90 degrees, and the first oil return section (41) is used for being communicated with a camshaft lubricating cavity of the engine;
the second oil return sections (42) and the first oil return sections (41) are arranged in a one-to-one correspondence manner, a first end of each second oil return section (42) is communicated with the corresponding first oil return section (41), an included angle is formed between each second oil return section (42) and the corresponding first oil return section (41), and a second end of each second oil return section (42) is used for being communicated with an oil pan of the engine;
a plurality of the third oil return section (43) and the second oil return section (42) are arranged in parallel with each other at intervals, and a first end of the third oil return section (43) is used for communicating with a camshaft lubrication cavity of the engine, and a second end of the third oil return section (43) is used for communicating with an oil pan of the engine.
8. The lubrication system of an engine according to claim 7, wherein the second oil return section (42) has a first reducer section (421) in the middle;
the inner diameter of the middle part of the first variable-diameter section (421) is larger than the inner diameters of the two ends.
9. The lubrication system of an engine according to claim 7, wherein the third oil return section (43) has a second reducer section (431) in the middle;
the inner diameter of the middle part of the second variable-diameter section (431) is larger than that of the two ends.
10. An engine, characterized in that it comprises a block (100), a head (200), an oil pan and a lubrication system of the engine according to any one of claims 1 to 9;
the cylinder body (100) is internally provided with a crankshaft lubricating cavity;
the cylinder cover (200) is hermetically covered at the top of the cylinder body (100), and a camshaft lubricating cavity is formed in the cylinder cover (200);
the oil pan is connected with the bottom of the cylinder body (100);
the lubricating system is connected with the side walls of the cylinder body (100) and the cylinder cover (200), and is communicated with the camshaft lubricating cavity and the crankshaft lubricating cavity.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110858145.5A CN113417712A (en) | 2021-07-28 | 2021-07-28 | Lubricating system of engine and engine |
| PCT/CN2022/101258 WO2023005538A1 (en) | 2021-07-28 | 2022-06-24 | Engine lubrication system and engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110858145.5A CN113417712A (en) | 2021-07-28 | 2021-07-28 | Lubricating system of engine and engine |
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| CN113417712A true CN113417712A (en) | 2021-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110858145.5A Pending CN113417712A (en) | 2021-07-28 | 2021-07-28 | Lubricating system of engine and engine |
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| Country | Link |
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| CN (1) | CN113417712A (en) |
| WO (1) | WO2023005538A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114542233A (en) * | 2022-02-21 | 2022-05-27 | 重庆长安汽车股份有限公司 | Low-flow-resistance engine cylinder body lubricating oil channel arrangement structure |
| CN115247585A (en) * | 2022-06-17 | 2022-10-28 | 潍柴动力股份有限公司 | Main oil gallery for removing impurities, lubricating system and engine |
| WO2023005538A1 (en) * | 2021-07-28 | 2023-02-02 | 奇瑞汽车股份有限公司 | Engine lubrication system and engine |
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| CN115247585A (en) * | 2022-06-17 | 2022-10-28 | 潍柴动力股份有限公司 | Main oil gallery for removing impurities, lubricating system and engine |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2023005538A1 (en) | 2023-02-02 |
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