WO2022063313A1

WO2022063313A1 - Engine lubricating system and engine

Info

Publication number: WO2022063313A1
Application number: PCT/CN2021/121193
Authority: WO
Inventors: 倪伟; 张欣林; 姜维
Original assignee: 奇瑞汽车股份有限公司
Priority date: 2020-09-28
Filing date: 2021-09-28
Publication date: 2022-03-31
Also published as: CN112145249A; CN112145249B

Abstract

An engine lubricating system, applied to an engine. The engine comprises a cylinder body (10) of an air cylinder, a cylinder cover (20) of the air cylinder, and a cover cap (30) which are sequentially stacked. At least two camshaft oil passages (40) are provided in the cylinder cover (20), and the camshaft oil passages (40) extend in a same direction. The engine lubricating system comprises: an engine oil pump (50), a main oil passage (60), and a connecting oil passage (70). The engine oil pump (50) has an engine oil pump oil inlet (501) and an engine oil pump oil outlet (502), and the engine oil pump oil inlet (501) is used for inputting lubricating oil. The main oil passage (60) penetrates through the cylinder body (10) and the cylinder cover (20), the main oil passage (60) has a main oil passage oil inlet (601) and a main oil passage oil outlet (602), and the main oil passage oil inlet (601) is communicated with the engine oil pump oil outlet (502). The connecting oil passage (70) is located in the cover cap (30), and the extending direction of the connecting oil passage (70) intersects with the extending direction of the camshaft oil passages (40); the connecting oil passage (70) has a connecting oil passage oil inlet (701) and a connecting oil passage oil outlet (702), the connecting oil passage oil inlet (701) is communicated with the main oil passage oil outlet (602), and the connecting oil passage oil outlet (702) is communicated with the corresponding camshaft oil passage (40) by means of an oil outlet pipe (703) penetrating through the cylinder cover (20).

Description

Engine Lubrication Systems and Engines

The present disclosure claims the priority of the Chinese Patent Application No. 202011045695.7 filed on September 28, 2020 and entitled "Engine Lubrication System and Engine", the entire contents of which are incorporated herein by reference.

technical field

The present disclosure relates to the field of automobiles, and in particular, to an engine lubrication system and an engine.

Background technique

The function of the engine lubrication system is to deliver a quantitative amount of clean lubricating oil to the surface of the parts that are in relative motion to achieve liquid friction, thereby reducing frictional resistance and reducing wear of parts. Clean and cool the surface of the parts. If these surfaces are not lubricated, intense friction will occur between them. Dry friction between metal surfaces not only increases the power consumption of the engine and accelerates the wear of the working surfaces of the parts, but also may burn the working surfaces of the parts due to the heat generated by the friction, making the engine unable to run.

SUMMARY OF THE INVENTION

Embodiments of the present disclosure provide an engine lubrication system, which can reduce the volume of the engine lubrication system. The technical solution is as follows:

In one aspect, the present disclosure provides an engine lubrication system, applied to an engine, the engine includes a cylinder block of a cylinder, a cylinder head of the cylinder and a cover, the cylinder block and the cylinder head are connected, and the cover is provided The cylinder head; at least two camshaft oil passages are arranged in the cylinder head, and each of the camshaft oil passages respectively extends along the first direction, and the engine lubrication system includes:

an oil pump, located outside the cylinder, the oil pump has an oil pump oil inlet and an oil pump oil outlet, and the oil pump oil inlet is used for inputting lubricating oil;

The main oil passage passes through the cylinder block and the cylinder head, the main oil passage has a main oil passage oil inlet and a main oil passage oil outlet, and the main oil passage oil inlet and the oil pump out The oil port is connected, and the oil outlet of the main oil passage is located in the cylinder head;

A connecting oil passage is located in the cover and extends along the second direction, the connecting oil passage has an oil inlet of the connecting oil passage and at least one oil outlet of the connecting oil passage, and the oil inlet of the connecting oil passage is connected with all the oil passages. The oil outlet of the main oil passage is communicated with the oil outlet of the main oil passage, the oil outlet of the at least one connecting oil passage is communicated with at least one of the camshaft oil passages through an oil outlet pipe passing through the cylinder head, and the second direction is connected to the first oil passage. intersect in one direction.

In an implementation manner of the embodiment of the present disclosure, the diameter of the connecting oil passage is smaller than the diameter of the main oil passage.

In an implementation manner of the embodiment of the present disclosure, the second direction is perpendicular to the first direction.

In an implementation of the embodiments of the present disclosure, the engine lubrication system further includes:

The sealing ring is sleeved on the connection between the main oil passage and the connecting oil passage.

In an implementation manner of the embodiment of the present disclosure, the number of the camshaft oil passages is 2;

The camshaft oil passage on the intake side of the engine is communicated with the connecting oil passage through the oil outlet pipe, and the camshaft oil passage on the exhaust side of the engine is directly connected to the oil passage of the main oil passage. The port communicates with the oil port, and the oil port is located in the cylinder head.

The tensioner oil passage is used for delivering lubricating oil to the tensioner, and the tensioner oil passage communicates with the camshaft oil passage on the intake side of the engine.

In an implementation manner of the embodiment of the present disclosure, the cylinder body is provided with a crankshaft through hole extending along the first direction;

The main oil passage includes:

a first main oil passage, one end of which is communicated with the oil outlet of the oil pump;

The second main oil passage extends along the first direction, the second main oil passage is used for inputting lubricating oil to the crankshaft through hole, the middle part of the second main oil passage and the other part of the first main oil passage connected at one end;

One end of the third main oil passage is connected with one end of the second main oil passage, and the other end is connected with the oil inlet of the connecting oil passage;

The engine lubrication system also includes:

A feedback oil passage is located in the cylinder, one end of the feedback oil passage is communicated with the other end of the second main oil passage, and the other end of the feedback oil passage is communicated with the sensing end of the oil pump.

In an implementation manner of the embodiment of the present disclosure, the engine lubrication system further includes a filter, and the first main oil passage communicates with the middle of the second main oil passage through the filter.

The first pressure switch is communicated with the camshaft oil passage, and the first pressure switch is electrically connected with the oil pump.

In another aspect, the present disclosure provides an engine lubricating system, which is applied to an engine. The engine includes a cylinder block of a cylinder, a cylinder head and a cover that are stacked in sequence, and at least one camshaft is arranged in the cylinder head. Oil passages, each of the camshaft oil passages extending in the same direction, is characterized in that the engine lubrication system includes: an oil pump, a main oil passage and a connecting oil passage;

The oil pump is located outside the cylinder, and the oil pump has an oil pump oil inlet and an oil pump oil outlet;

The main oil passage runs through the cylinder block and the cylinder head, the main oil passage has a main oil passage oil inlet and a main oil passage oil outlet, and the main oil passage oil inlet and the oil pump out The oil port is connected, and the oil outlet of the main oil passage is located in the cylinder head;

The connection oil passage is located in the cover, and the extension direction of the connection oil passage intersects with the extension direction of the camshaft oil passage, and the connection oil passage has a connection oil passage inlet and a connection oil passage outlet. An oil port, the oil inlet port of the connecting oil passage communicates with the oil outlet port of the main oil passage, and the oil outlet port of the connecting oil passage communicates with the camshaft oil passage through an oil outlet pipe passing through the cylinder head.

In an implementation manner of the embodiment of the present disclosure, the extending direction of the connecting oil passage is perpendicular to the extending direction of the camshaft oil passage.

In an implementation of the embodiments of the present disclosure, the engine lubrication system further includes: a sealing ring;

The sealing ring is sleeved at the connection between the main oil passage and the connecting oil passage.

In an implementation manner of the embodiment of the present disclosure, the number of the camshaft oil passages is:

One of the two camshaft oil passages is located on the intake side of the engine, and communicates with the connecting oil passage through the oil outlet pipe;

The other one of the two camshaft oil passages is located on the exhaust side of the engine, and directly communicates with the oil port of the main oil passage, and the oil port of the main oil passage is located in the cylinder head.

In an implementation manner of the embodiment of the present disclosure, the engine lubrication system further includes: a tensioner oil passage;

The tensioner oil passage communicates with the camshaft oil passage on the intake side of the engine.

In an implementation manner of the embodiment of the present disclosure, the cylinder body has a crankshaft through hole, and the crankshaft through hole extends along the length direction of the camshaft oil passage;

The main oil passage includes: a first main oil passage, a second main oil passage and a third main oil passage;

The first end of the first main oil passage is communicated with the oil outlet of the oil pump, the second main oil passage extends along the length direction of the camshaft oil passage, and the middle portion of the second main oil passage is connected to the camshaft oil passage. The second end of the first main oil passage is communicated, the second main oil passage is used for inputting lubricating oil to the crankshaft through hole, and the first end of the third main oil passage is connected with the second main oil passage. The first end is in communication, and the second end of the third main oil passage is in communication with the oil inlet of the connecting oil passage.

In an implementation manner of the embodiment of the present disclosure, the engine lubrication system further includes: a feedback oil passage;

The feedback oil passage is located in the cylinder body, the first end of the feedback oil passage is communicated with the second end of the second main oil passage, and the second end of the feedback oil passage is connected with the oil pump. The sensing end is connected.

In an implementation of the embodiments of the present disclosure, the engine lubrication system further includes a filter;

The first main oil passage communicates with the middle of the second main oil passage through the filter.

In an implementation of the embodiments of the present disclosure, the engine lubrication system further includes: a first pressure switch;

The first pressure switch is communicated with the camshaft oil passage, and the first pressure switch is electrically connected to the oil pump.

In yet another aspect, the present disclosure provides an engine comprising the engine lubrication system of any one of the preceding aspects.

The beneficial effects brought by the technical solutions provided by the embodiments of the present disclosure are:

The lubricating oil enters the oil pump through the oil pump inlet, the oil pump outputs the lubricating oil to the main oil channel oil inlet of the main oil channel through the oil pump outlet, and the lubricating oil enters the connecting oil channel through the main oil channel oil outlet The oil inlet, and then enter the oil outlet pipe through the oil outlet of the connecting oil passage, and then enter the camshaft oil passage through the oil outlet pipe. The lubricating oil enters the camshaft through the camshaft oil passage to lubricate the camshaft.

Moreover, since the inner space of the cover in the direction perpendicular to its own length is large, the connecting oil passage is arranged in the cover, and the oil outlet pipe passing through the cylinder head is communicated with the oil passage of the camshaft, so that the camshaft can be supplied to the camshaft. Provides lubricating oil without occupying space in the cylinder head, effectively reducing the volume of the cylinder head, thereby reducing the volume of the entire engine.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present disclosure more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

FIG. 1 is a simple structural schematic diagram of an engine provided by an embodiment of the present disclosure;

2 is a schematic structural diagram of an engine lubrication system provided by an embodiment of the present disclosure;

3 is a schematic structural diagram of a lubricating oil passage in a cylinder provided by an embodiment of the present disclosure;

4 is a schematic structural diagram of a lubricating oil passage in a cylinder head provided by an embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of a lubricating oil passage in a cover according to an embodiment of the present disclosure.

detailed description

In order to make the objectives, technical solutions and advantages of the present disclosure clearer, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

In the related art, an engine includes a cylinder block of a cylinder, a cylinder head and a cover. There is a cylinder chamber in the cylinder block, the top of the cylinder block is connected with the cylinder head, and the cylinder head seals the top of the cylinder chamber of the cylinder block to ensure the cylinder chamber. of sealing. The cover cover is arranged on the top end of the cylinder head to protect the cylinder head. There are two camshaft oil passages in the cylinder head. In order to connect the oil pump with the two camshaft oil passages, it is necessary to arrange connecting oil passages. The oil pump needs to communicate with the two camshaft oil passages through the connecting oil passages. The extending direction of the passage intersects the extending direction of the camshaft oil passage. The connecting oil passages are located in the cylinder head, resulting in a larger cylinder head volume, which in turn results in a larger overall engine volume.

FIG. 1 is a schematic diagram of a simple structure of an engine provided by an embodiment of the present disclosure. Referring to FIG. 1 , the engine includes a cylinder block 10 of cylinders, a cylinder head 20 and a cover 30 of the cylinders, which are stacked in sequence. The cylinder block 10 is connected to the cylinder head 20 , and the cover 30 covers the cylinder head 20 . The cylinder block 10 has a crankshaft through hole 101, and the cylinder head 20 is provided with at least two camshaft oil passages 40, and each camshaft oil passage 40 extends along the first direction a respectively.

The cylinder block 10 is connected to the crankshaft bearing cover 103 , the surface of the cylinder block 10 opposite to the crankshaft bearing cover 103 has a semicircular groove, and the surface of the crankshaft bearing cover 103 opposite to the cylinder block 10 also has a semicircular groove , the two semicircular grooves are opposite to each other. When the cylinder block 10 is connected with the crankshaft bearing cover 103, the two semicircular grooves form a crankshaft through hole 101, which is convenient for installation.

FIG. 2 is a schematic structural diagram of an engine lubrication system provided by an embodiment of the present disclosure. Referring to FIG. 2 , the engine lubrication system includes: an oil pump 50 , a main oil passage 60 and a connecting oil passage 70 . The camshaft oil passage 40 , the main oil passage 60 and the connecting oil passage 70 all belong to the lubricating oil passages of the engine lubrication system.

The oil pump 50 is located outside the cylinder block 10. The oil pump 50 has an oil pump inlet 501 and an oil pump outlet 502, and the oil pump inlet 501 is used for inputting lubricating oil. The main oil passage 60 passes through the cylinder block 10 and the cylinder head 20, the main oil passage 60 has a main oil passage oil inlet 601 and a main oil passage oil outlet 602, and the main oil passage oil inlet 601 communicates with the oil pump outlet 502 , the oil outlet 602 of the main oil passage is located in the cylinder head 20 . The connecting oil passage 70 is located in the cover 30 and extends along the second direction b, and the second direction b intersects the first direction a. The connecting oil passage 70 has a connecting oil passage oil inlet 701 and at least one connecting oil passage oil outlet 702 , the oil inlet 701 of the connecting oil passage is communicated with the oil outlet 602 of the main oil passage, and at least one oil outlet 702 of the connecting oil passage is communicated with at least one camshaft oil passage 40 through the oil outlet pipe 703 passing through the cylinder head 20 .

Moreover, the connecting oil passage is arranged in the cover, and then communicates with the camshaft oil passage through the oil outlet pipe passing through the cylinder head, so as to provide lubricating oil to the camshaft, instead of directly arranging the connecting oil passage in the space in the cylinder head . Since the connecting oil passages need to be arranged in the second direction, the space in the cylinder head in the second direction is limited, while the space in the cover head in the second direction is large enough. On the one hand, it is convenient to arrange the connecting oil passages, and on the other hand, the volume of the cylinder head can be reduced by not arranging the connecting oil passages in the cylinder head, thereby reducing the volume of the whole engine.

In the embodiment of the present disclosure, the second direction b is perpendicular to the first direction a.

Since the second direction b is perpendicular to the first direction a, that is, the extending direction of the connecting oil passage 70 is perpendicular to the extending direction of the camshaft oil passage 40 , the length of the connecting oil passage 70 is the shortest, reducing the size of the connecting oil passage 70 in the cover The volume occupied in the cover 30, thereby making the cover 30 smaller, thereby reducing the volume of the entire engine.

In the embodiment of the present disclosure, the oil pump 50 can be installed on the outer side wall of the cylinder block 10 to ensure the stability of the oil pump 50 and at the same time make the oil pump 50 closer to the cylinder block 10 . The oil inlet 601 is communicated with the oil outlet 502 of the oil pump, so the length of the main oil passage 60 can be reduced, thereby reducing the volume of the entire engine lubrication system and the volume of the engine. Since the oil pump 50 is located outside the cylinder block 10 , the main oil passage 60 communicates with the oil pump outlet 502 through the side wall of the cylinder block 10 , so the main oil passage oil inlet 601 is also located outside the cylinder block 10 .

3 is a schematic structural diagram of a lubricating oil passage in a cylinder provided by an embodiment of the present disclosure. 3, the cylinder block 10 has a crankshaft through hole 101, the crankshaft through hole 101 extends along the first direction a, that is, the crankshaft through hole 101 extends along the length direction of the camshaft oil passage 40, and the crankshaft through hole 101 is used for arranging the crankshaft, The power unit of the engine drives the crankshaft to rotate, and the crankshaft drives other accessories on the engine to work.

As shown in FIGS. 2 and 3 , the main oil passage 60 includes a first main oil passage 61 , a second main oil passage 62 and a third main oil passage 63 . The first end of the first main oil passage 61 is communicated with the oil outlet 502 of the oil pump, and the second end of the first main oil passage 61 is communicated with the middle of the second main oil passage 62 . The second main oil passage 62 extends in the first direction a, and the second main oil passage 62 is configured to input lubricating oil into the crankshaft through hole 101 . The first end of the third main oil passage 63 is communicated with the first end of the second main oil passage 62 , and the second end of the third main oil passage 63 is communicated with the oil inlet port 701 of the connecting oil passage.

Exemplarily, the first main oil passages 61 are arranged vertically, that is, arranged in the direction from the cylinder block 10 to the cover 30 .

In the embodiment of the present disclosure, the first main oil passage 61 is communicated with the oil outlet 502 of the oil pump for outputting lubricating oil, that is, the main oil passage 602 is located on the first main oil passage 61 . The second main oil passage 62 is used to deliver lubricating oil to the crankshaft located in the crankshaft through hole 101 to lubricate the crankshaft, the third main oil passage 63 is used to deliver lubricating oil to the connecting oil passage, and the oil outlet of the main oil passage is located in the first on the three main oil passages 63 .

As shown in FIG. 3 , the side wall of the second main oil passage 62 has a plurality of crankshaft oil outlet pipes 621 communicating with the inner cavity of the second main oil passage 62 , and the lubricating oil in the second main oil passage 62 passes through the crankshaft oil outlet pipes 621 Enter into the crankshaft through hole 101 to lubricate the crankshaft in the crankshaft through hole 101 .

Exemplarily, a plurality of crankshaft oil outlet pipes 621 are evenly spaced on the side wall of the second main oil passage 62, so that the lubricating oil can enter the same crankshaft through hole 101 evenly.

In the embodiment of the present disclosure, the side wall of the second main oil passage 62 has a throttle hole, and the second main oil passage 62 communicates with the crankshaft oil outlet pipe 621 through the throttle hole.

As shown in FIG. 3 , an arc-shaped crankshaft diameter 622 is connected to the crankshaft oil outlet pipe 621 of the second main oil passage 62 . The crankshaft diameter 622 has a channel for the flow of lubricating oil, and the crankshaft diameter 622 conveys the lubricating oil. To the crankshaft main journal of the crankshaft, during the rotation of the crankshaft, the friction force between the crankshaft main journal and the bearing bush is reduced.

As shown in FIG. 2 and FIG. 3 , the side wall of the second main oil passage 62 has a plurality of fuel injection nozzle oil outlet pipes 623 communicating with the inner cavity of the second main oil passage 62 , and the plurality of crankshaft oil outlet pipes 621 may The fuel injection nozzle fuel outlet pipes 623 are evenly spaced. The lubricating oil in the second main oil passage 62 is delivered to the oil injection nozzle through the oil outlet pipe 623 of the oil injection nozzle, and the injected oil cools the piston. The lubricating oil not only has the function of lubricating, but also has the function of cooling. The injected oil cools the piston through the lubricating oil, which reduces the temperature of the piston part of the engine and avoids the damage of the piston caused by the engine knocking caused by the high temperature.

As shown in FIGS. 2 and 3 , a timing chain oil passage 624 is also arranged on the first main oil passage 61 . The timing chain oil passage 624 is communicated with the crankshaft shaft diameter 622 , and the lubricating oil passes through the timing chain oil passage 624 to the positive direction. The timing chain transports lubricating oil to lubricate the timing chain to ensure the smooth operation of the timing chain.

As shown in FIG. 3 , a filter 110 is arranged in the middle of the second main oil passage 62 , and the first main oil passage 61 communicates with the middle of the second main oil passage 62 through the filter 110 .

After the lubricating oil flows into the filter 110, the filter 110 filters the lubricating oil, and after filtering the lubricating oil, the lubricating oil flows to the second main oil passage 62 and the third main oil passage 63, so as to avoid excessive impurities in the lubricating oil and block the oil. road.

As shown in FIG. 3 , the filter 110 communicates with the middle of the second main oil passage 62 through the curved oil passage 111 . After the lubricating oil flows out of the filter 110, the flow rate is relatively high, and the impact force on the lubricating oil passage is relatively large. The curved oil passage 111 is arranged, and the lubricating oil flows through the curved oil passage 111 and then flows to the second main oil passage 62, reducing the flow rate. , to avoid damage to the lubricating oil passage caused by the impact force.

As shown in FIG. 3 , the third main oil passage 63 includes a first oil passage 631 and a second oil passage 632 , wherein the first oil passage 631 communicates with the second main oil passage 62 , and the second oil passage 632 communicates with the second main oil passage 63 . The first oil passage 631 communicates with the connecting oil passage 70 . The third main oil passage 63 is divided into two sections to facilitate the arrangement of the main oil passage 60 .

In the embodiment of the present disclosure, the first section of the oil passage 631 extends along the vertical direction, and the second section of the oil passage 632 extends along the first direction a.

As shown in FIG. 3 , the second oil passage 632 is communicated with the middle of the first oil passage 631 , the first end of the first oil passage 631 is communicated with the second main oil passage 62 , and the first end of the first oil passage 631 is connected to the second main oil passage 62 . The oil passages 633 reserved for the supercharger are arranged at both ends. The lubricating oil in the first oil passage 631 flows to the turbocharger of the engine through the reserved oil passage 633 of the supercharger to provide lubrication for the turbocharger. The oil passage 633 reserved for the supercharger is arranged, which reduces the difficulty of oil passage arrangement in the later stage.

In the embodiment of the present disclosure, when the supercharger reserved oil passage 633 is not in use, it may be sealed by a bowl plug or a plugging process or a rivet.

In the embodiments of the present disclosure, when the ends of the oil passages need to be sealed, they can be sealed by a riveting process.

As shown in FIG. 3 , the engine in the embodiment of the present disclosure is a four-cylinder engine, that is, the cylinder block 10 includes four cylinder chambers 102 , and gas is combusted in the four cylinder chambers 102 to convert chemical energy into mechanical energy to drive the engine run.

As shown in FIG. 3 , the block 10 is also arranged with passages 104 in communication with engine accessories.

As shown in FIG. 2 and FIG. 3 , the engine lubrication system further includes: a feedback oil passage 100 . The feedback oil passage 100 is located in the cylinder block 10 , the first end of the feedback oil passage 100 is communicated with the other end of the second main oil passage 62 , and the second end of the feedback oil passage 100 is communicated with the sensing end of the oil pump 50 .

The lubricating oil flows from the first end to the second end of the second main oil passage 62 to deliver the lubricating oil into the crankshaft through hole 101 . During the flow of the lubricating oil, due to the friction between the lubricating oil and the oil passage, the oil pressure of the lubricating oil is reduced, resulting in a lower oil pressure of the lubricating oil at the second end of the second main oil passage 62 . The feedback oil passage 100 communicates with the second end of the second main oil passage 62, and the feedback oil passage 100 transmits the lubricating oil at the second end of the second main oil passage 62 to the sensing end of the oil pump 50, and the sensing end of the oil pump 50 senses The oil pressure at the second end of the second main oil passage 62 controls the oil pressure at the oil outlet 502 of the oil pump to provide pressure for the lubricating oil, so that the lubricating oil can flow to the second end of the second main oil passage 62 , thereby reducing the pressure on the crankshaft. All parts are lubricated to realize real-time adjustment of the oil pressure of the engine lubrication system.

Exemplarily, when the sensing end of the oil pump 50 senses that the oil pressure at the second end of the second main oil passage 62 is low, the oil pressure at the oil outlet 502 of the oil pump is increased, thereby increasing the oil pressure of the lubricating oil. When the sensing end of the oil pump 50 senses that the oil pressure at the second end of the second main oil passage 62 is larger, the oil pressure at the oil outlet 502 of the oil pump is reduced, thereby reducing the oil pressure of the lubricating oil.

In the embodiment of the present disclosure, the oil pump 50 is a two-stage variable displacement oil pump or a fully variable oil pump. The two-stage variable displacement oil pump or the fully variable oil pump has a sensing end and a control end, and the sensing end mainly It is used to sense the oil pressure from the feedback oil passage 100, and its own structural design can implement displacement adjustment, and the control end is used to control the pressure of the oil pump outlet according to the pressure sensed by the sensing end. The two-stage variable displacement oil pump or the fully variable oil pump can effectively adjust the oil pressure of the lubricating oil in the system according to the oil pressure sensed by the sensing end, reduce the additional pressure loss of the oil pressure, and avoid the filter 110 being affected by the engine speed. and temperature sensitivity to oil pressure, therefore, oil pressure control is more precise, and fuel consumption savings are more significant.

Through preliminary estimation of the fuel consumption of the engine lubrication system provided by the embodiments of the present disclosure, the fuel consumption of the engine lubrication system is saved by not less than 1%.

FIG. 4 is a schematic structural diagram of a lubricating oil passage in a cylinder head provided by an embodiment of the present disclosure. Referring to FIG. 4 , two camshaft oil passages 40 are arranged in the cylinder head 20 . A camshaft oil passage 40 is located on the intake side of the engine, which can be called an intake side camshaft oil passage 401, and a camshaft oil passage 40 is located on the exhaust side of the engine, which can be called an exhaust side camshaft oil passage 402. The camshaft oil gallery 40 on the intake side of the engine sends lubricating oil to the camshaft on the intake side, and lubricates the camshaft on the intake side. The camshaft oil gallery 40 located on the exhaust side of the engine sends lubricating oil to the camshaft on the exhaust side, and lubricates the camshaft on the exhaust side.

In the embodiment of the present disclosure, the end surface of the cylinder head 20 facing the cover has a first groove 201 and a second groove 202 extending along the first direction a and having a semicircular cross-section.

FIG. 5 is an arrangement diagram of a lubricating oil passage in a cover according to an embodiment of the present disclosure. Referring to FIG. 5 , the end surface of the cover 30 facing the cylinder head 20 has a third groove 301 and a fourth groove 302 extending along the first direction a and having a semicircular cross-section.

When the cylinder head 20 and the cover 30 are connected, the first groove 201 is opposite to the third groove 301 to form an intake side camshaft through hole, and the second groove 202 is opposite to the fourth groove 302 to form an exhaust side camshaft through hole. The intake side camshaft is located in the intake side camshaft through hole, and the exhaust side camshaft is located in the exhaust side camshaft through hole.

The role of the camshaft is to control the opening and closing of the valve. The camshaft rotates smoothly in the engine to ensure the normal operation of the engine. The lubricating oil is supplied to the camshaft through the camshaft oil passage 401 on the intake side and the camshaft oil passage 402 on the exhaust side, so that the camshaft can rotate smoothly.

As shown in FIG. 2 and FIG. 4 , the side wall of the intake side camshaft oil passage 401 has a plurality of intake side camshaft oil outlet pipes 411 communicating with the inner cavity of the intake side camshaft oil passage 401 . The lubricating oil in the shaft oil passage 401 enters into the through hole of the intake side camshaft through the intake side camshaft oil outlet pipe 411 to lubricate the intake side camshaft in the through hole of the intake side camshaft.

As shown in FIG. 2 and FIG. 4 , a plurality of intake side camshaft oil outlet pipes 411 are evenly spaced on the side wall of the intake side camshaft oil passage 401, so that the lubricating oil can evenly enter the intake side camshaft passage. in the hole.

As shown in FIGS. 2 and 4 , an arc-shaped intake side camshaft oil outlet plate 412 is connected to the intake side camshaft oil outlet pipe 411, and the intake side camshaft oil outlet plate 412 delivers lubricating oil to the intake side On the side wall of the camshaft, during the rotation of the intake side camshaft, the friction force between the intake side camshaft and the through hole of the intake side camshaft is reduced.

Similarly, the side wall of the exhaust side camshaft oil passage 402 has a plurality of exhaust side camshaft oil outlet pipes 421 communicating with the inner cavity of the exhaust side camshaft oil passage 402 . The lubricating oil enters the exhaust-side camshaft through hole through the exhaust-side camshaft oil outlet pipe 421, and lubricates the intake-side camshaft in the exhaust-side camshaft through-hole.

Exemplarily, a plurality of exhaust-side camshaft oil outlet pipes 421 are evenly spaced on the side wall of the exhaust-side camshaft oil passage 402, so that the lubricating oil can evenly enter the exhaust-side camshaft through holes.

As shown in FIG. 2 and FIG. 4 , an arc-shaped exhaust side camshaft oil outlet plate 422 is connected to the exhaust side camshaft oil outlet pipe 421, and the exhaust side camshaft oil outlet plate 422 delivers lubricating oil to the exhaust side On the side wall of the camshaft, during the rotation of the exhaust-side camshaft, the frictional force between the exhaust-side camshaft and the exhaust-side camshaft through hole is reduced.

As shown in FIG. 2 and FIG. 4 , the side wall of the intake side camshaft oil passage 401 has a plurality of intake side hydraulic tappet oil outlet pipes 413 communicating with the inner cavity of the intake side camshaft oil passage 401 . The lubricating oil in the camshaft oil passage 401 is transported to the hydraulic tappet through the intake side hydraulic tappet oil outlet pipe 413 to lubricate the intake side hydraulic tappet.

As shown in FIGS. 2 and 4 , the side wall of the exhaust side camshaft oil passage 402 has a plurality of exhaust side hydraulic tappet oil outlet pipes 423 communicating with the inner cavity of the exhaust side camshaft oil passage 402 . The lubricating oil in the camshaft oil passage 402 is delivered to the hydraulic tappet through the hydraulic tappet oil outlet pipe 423 on the exhaust side to lubricate the hydraulic tappet on the exhaust side.

As shown in FIGS. 2 and 4 , the camshaft oil passage 40 on the intake side of the engine is communicated with the connecting oil passage 70 through the camshaft oil outlet pipe 703 , and the camshaft oil passage 40 on the exhaust side of the engine is directly connected to the main oil passage 70 . The oil port 603 of the channel 60 is communicated, and the oil port 603 is located in the cylinder head 20 .

The camshaft oil outlet pipe 703 may be arranged in a vertical direction, and the camshaft oil outlet pipe 703 passes through the cover 30 and the cylinder head 20 and communicates with the camshaft oil passage 40 in the cylinder head 20 .

The temperature of the exhaust side of the engine is higher than the temperature of the intake side of the engine, and at the same time, the oil pressure will decrease during the flow of the lubricating oil. Based on the above two points, in the embodiment of the present disclosure, the exhaust side camshaft oil passage 402 is directly communicated with the oil port 603 of the main oil passage 60, and the lubricating oil in the main oil passage 60 is directly delivered to the exhaust side camshaft oil passage 402 can reduce the pressure loss of the lubricating oil entering the camshaft oil passage 402 on the exhaust side, so that the flow rate of the lubricating oil in the camshaft oil passage 402 on the exhaust side increases, and the lubricating oil is taken away in the process of flowing. The heat of the gas-side camshaft reduces the temperature of the exhaust-side camshaft. The greater the flow rate, the better the temperature cooling effect, thereby reducing the influence of temperature on the exhaust-side camshaft.

As shown in FIG. 2 and FIG. 4 , an arc-shaped bearing pair 704 is connected to the side wall of the connecting oil passage 70 , and each bearing pair 704 has a passage for lubricating oil to flow, and the bearing pair 704 conveys the lubricating oil to the camshaft. , the camshaft can also be lubricated.

As shown in FIGS. 2 and 4 , the intake-side camshaft oil passage 401 is also communicated with the tensioner oil passage 90 , and the tensioner oil passage 90 is used to deliver lubricating oil to the tensioner.

Since the temperature of the lubricating oil increases during the lubrication process, the temperature on the exhaust side of the engine is greater than the temperature on the intake side of the engine. The oil passage 90 of the tensioner is arranged and designed on the intake side to ensure the reliable operation of the hydraulic tensioner and reduce the radiation of temperature to the hydraulic tensioner.

As shown in FIGS. 2 and 4 , the engine lubrication system further includes: a first pressure switch 120 . The first pressure switch 120 is communicated with the camshaft oil passage 40 , and the first pressure switch 120 is electrically connected with the oil pump 50 .

The communication between the first pressure switch 120 and the camshaft oil passage 40 means that the first pressure switch 120 is communicated with the end of the camshaft oil passage 40 for sensing the oil pressure in the camshaft oil passage 40 .

During the flow of the lubricating oil, the oil pressure will decrease. When the lubricating oil flows to the camshaft oil passage 40, the oil pressure is the smallest. The oil pressure of the camshaft oil passage 40 is fed back in the form of an electrical signal through the first pressure switch 120. The oil pump 50 is supplied to the oil pump 50, and the oil pump 50 receives the electrical signal, and controls the oil pressure of the oil pump oil outlet 502 according to the oil pressure of the camshaft oil passage 40 indicated by the electrical signal, so that the lubricating oil can flow into the camshaft oil passage 40, Thus, various parts of the camshaft are lubricated to realize real-time adjustment of the oil pressure of the engine lubrication system.

In the embodiment of the present disclosure, the pressure of the lubricating oil in the intake side camshaft oil passage 401 is relatively small, and the first pressure switch 120 can be communicated with the intake side camshaft oil passage 401, so that the sensing end of the oil pump 50 is more The minimum oil pressure to sense the entire engine lubrication system.

As shown in FIG. 2 , the first main oil passage 61 is provided with an oil pressure outlet 611 that communicates with the second pressure switch. The second pressure switch detects the pressure in the first main oil passage 61 and feeds it back to the first main oil passage 61 in the form of an electrical signal. The oil pump 50 avoids that the oil pressure output by the oil inlet port 501 of the oil pump cannot meet the requirement of lubricating oil circulation.

In one implementation of the embodiment of the present disclosure, the diameter of the connecting oil passage 70 is smaller than the diameter of the main oil passage 60 . For example, the diameter of the connecting oil passage 70 is smaller than the diameter of the third main oil passage 60 .

By reducing the diameter of the connecting oil passage 70, the volume of the connecting oil passage 70 can be reduced, and the volume occupied by the connecting oil passage 70 in the cover 30 can be reduced, so that the cover 30 can be made smaller, thereby reducing the overall engine cost. volume.

As shown in FIG. 2 to FIG. 5 , the engine lubrication system further includes: a sealing ring 80 . The sealing ring 80 is sleeved at the connection between the main oil passage 60 and the connecting oil passage 70 .

The sealing ring 80 ensures the tightness of the connection between the main oil passage 60 and the connecting oil passage 70 and avoids the leakage of lubricating oil.

Illustratively, the sealing ring 80 may be an O-ring.

In the embodiment of the present disclosure, a sealing ring 80 may also be arranged at the connection between the camshaft oil outlet pipe 703 and the camshaft oil passage 40 to ensure the tightness of the connection between the camshaft oil outlet pipe 703 and the camshaft oil passage 40 .

In the engine lubricating system provided by the embodiments of the present disclosure, all oil passages are cast, and the oil passages can be properly optimized according to the space, and the pipe diameter of the oil passages can be changed according to actual oil pressure requirements, which can save processing costs.

The engine lubrication system provided by the embodiment of the present disclosure further includes a filter module 130, which is installed on the cylinder block 10 of the engine. The filter module 130 is used for cooling and filtering the lubricating oil. The filter module 130 is connected to the oil pump. The oil inlet 501 is connected, and the lubricating oil delivered by the oil pump is cooled and filtered by the machine filter module, and then sent to the main oil passage to prevent impurities in the lubricating oil from blocking the main oil passage.

Exemplarily, the engine filter module 130 is a component that is integrally formed by an oil cooler and an oil filter, and the engine lubrication system provided by the embodiments of the present disclosure eliminates the traditional oil filter connector and the accessories attached to the engine filter connector. bolts, and directly integrate the oil cooler and the oil filter, which not only effectively reduces the cost of the engine, but also makes the layout of the engine more compact.

In the embodiment of the present disclosure, the lubricating oil will flow to the cavity at the bottom of the engine after lubricating.

The engine lubrication system provided by the embodiment of the present disclosure further includes a collector, which is used for collecting lubricating oil in the cavity at the bottom of the engine, and the collector is communicated with the oil pump oil inlet 501, so that the oil pump 50 will flow to the cavity at the bottom of the engine The lubricating oil output in the engine is lubricated again, so that the engine lubrication system forms a circulatory system.

In the embodiment of the present disclosure, the collector may be integrated on the oil pump to reduce the volume of the engine lubrication system.

The engine lubrication system provided by the embodiments of the present disclosure may further include a connection seat, a cooling device, a heating device, a sealing device, a buffer device, a safety device, an alarm, and the like.

Embodiments of the present disclosure also provide an engine, which includes the engine lubrication system shown in any one of the above figures.

The lubricating oil enters the oil pump through the oil pump inlet, the oil pump outputs the lubricating oil to the main oil channel inlet of the main oil channel through the oil pump outlet, and the lubricating oil enters the connecting oil channel through the main oil channel outlet The oil inlet, and then enter the oil outlet pipe through the oil outlet of the connecting oil passage, and then enter the camshaft oil passage through the oil outlet pipe. The lubricating oil enters the camshaft through the camshaft oil passage to lubricate the camshaft. The connecting oil passage is arranged in the cover, and then communicates with the camshaft oil passage through the oil outlet pipe passing through the cylinder head, so as to provide lubricating oil to the camshaft, instead of directly arranging the connecting oil passage in the space in the cylinder head. Since the connecting oil passages need to be arranged in the second direction, the space in the cylinder head in the second direction is limited, while the space in the cover head in the second direction is large enough. On the one hand, it is convenient to arrange the connecting oil passages, and on the other hand, the volume of the cylinder head can be reduced by not arranging the connecting oil passages in the cylinder head, thereby reducing the volume of the whole engine.

The above descriptions are only optional embodiments of the present disclosure, and are not intended to limit the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the protection of the present disclosure. within the range.

Claims

An engine lubrication system, applied to an engine, the engine comprises a cylinder block (10) of a cylinder, a cylinder head (20) and a cover (30) stacked in sequence, wherein the cylinder head (20) is provided with At least two camshaft oil passages (40), each of the camshaft oil passages (40) extending in the same direction, characterized in that the engine lubrication system comprises: an oil pump (50), a main oil passage (60) and connecting oil passage (70);

The oil pump (50) is located outside the cylinder block (10), and the oil pump (50) has an oil pump inlet (501) and an oil pump outlet (502);

The main oil passage (60) runs through the cylinder block (10) and the cylinder head (20), and the main oil passage (60) has a main oil passage oil inlet (601) and a main oil passage oil outlet (602), the main oil passage oil inlet (601) is communicated with the oil pump oil outlet (502), and the main oil passage oil outlet (602) is located in the cylinder head (20);

The connection oil passage (70) is located in the cover (30), and the extension direction of the connection oil passage (70) intersects with the extension direction of the camshaft oil passage (40). (70) has a connecting oil passage oil inlet (701) and a connecting oil passage oil outlet (702), the connecting oil passage oil inlet (701) is communicated with the main oil passage oil outlet (602), so The oil outlet (702) of the connecting oil passage communicates with the camshaft oil passage (40) through an oil outlet pipe (703) passing through the cylinder head (20).
The engine lubrication system according to claim 1, wherein the diameter of the connecting oil passage (70) is smaller than the diameter of the main oil passage (60).
The engine lubrication system according to claim 1, wherein the extending direction of the connecting oil passage (70) is perpendicular to the extending direction of the camshaft oil passage (40).
The engine lubrication system according to any one of claims 1 to 3, wherein the engine lubrication system further comprises: a sealing ring (80);

The sealing ring (80) is sleeved at the connection between the main oil passage (60) and the connecting oil passage (70).
The engine lubrication system according to any one of claims 1 to 3, wherein the number of the camshaft oil passages (40) is 2;

One of the two camshaft oil passages (40) is located on the intake side of the engine, and communicates with the connecting oil passage (70) through the oil outlet pipe (703);

The other one of the two camshaft oil passages (40) is located on the exhaust side of the engine, and is directly communicated with the oil port (603) of the main oil passage (60), the main oil passage (60) ) oil port (603) is located in the cylinder head (20).
The engine lubrication system according to claim 5, wherein the engine lubrication system further comprises: a tensioner oil passage (90);

The tensioner oil passage (90) communicates with the camshaft oil passage (40) on the intake side of the engine.
The engine lubrication system according to any one of claims 1 to 3, wherein the cylinder block (10) is provided with a crankshaft through hole (101), and the crankshaft through hole (101) is along the camshaft oil The length direction of the track (40) extends;

The main oil passage (60) includes: a first main oil passage (61), a second main oil passage (62) and a third main oil passage (63);

The first end of the first main oil passage (61) is communicated with the oil outlet (502) of the oil pump, and the second main oil passage (62) is along the length direction of the camshaft oil passage (40). extending, the middle part of the second main oil passage (62) communicates with the second end of the first main oil passage (61), and the second main oil passage (62) is used to extend to the crankshaft through hole (101) Input lubricating oil, the first end of the third main oil passage (63) is communicated with the first end of the second main oil passage (62), and the second end of the third main oil passage (63) is connected to The oil inlet (701) of the connecting oil passage is communicated.
The engine lubrication system according to claim 7, wherein the engine lubrication system further comprises: a feedback oil passage (100);

The feedback oil passage (100) is located in the cylinder block (10), the first end of the feedback oil passage (100) is communicated with the second end of the second main oil passage (62), and the feedback The second end of the oil passage (100) communicates with the sensing end of the oil pump (50).
The engine lubrication system according to claim 7, wherein the engine lubrication system further comprises a filter (110);

The first main oil passage (61) communicates with the middle of the second main oil passage (62) through the filter (110).
The engine lubrication system according to any one of claims 1 to 3, wherein the engine lubrication system further comprises: a first pressure switch (120);

The first pressure switch (120) is communicated with the camshaft oil passage (40), and the first pressure switch (120) is electrically connected with the oil pump (50).
An engine, characterized in that the engine comprises the engine lubrication system according to any one of claims 1 to 10.