阅读说明：本技术 发动机 (Engine ) 是由 倪伟 庞淑娟 姜维 于 2021-07-28 设计创作，主要内容包括：本公开提供了一种发动机,属于汽车领域。发动机包括缸体、曲轴、两个缸盖、多个凸轮轴和润滑系统；曲轴可转动地插接在缸体内；两个缸盖罩盖在缸体的顶部,且相互间隔；一部分凸轮轴可转动地插接在两个缸盖中的一个内,另一部分凸轮轴可转动地插接在两个缸盖中的另一个内,凸轮轴与曲轴相互平行布置；润滑系统包括机油泵和主油道,机油泵与缸体的外侧壁连接,主油道的第一部分位于缸体的侧壁内,主油道的第二部分位于其中一个缸盖的侧壁内,主油道的第三部分位于另一个缸盖的侧壁内。本公开通过发动机润滑系统,可以降低成发动机润滑系统的成本,同时又能够使得油道的布置不占用发动机的体积。(The disclosure provides an engine, and belongs to the field of automobiles. The engine comprises a cylinder body, a crankshaft, two cylinder covers, a plurality of camshafts and a lubricating system; the crankshaft is rotatably inserted in the cylinder body; the two cylinder covers cover the top of the cylinder body and are spaced from each other; one part of the cam shaft can be rotatably inserted in one of the two cylinder covers, the other part of the cam shaft can be rotatably inserted in the other of the two cylinder covers, and the cam shaft and the crankshaft are arranged in parallel; the lubricating system comprises an oil pump and a main oil gallery, wherein the oil pump is connected with the outer side wall of the cylinder body, a first part of the main oil gallery is positioned in the side wall of the cylinder body, a second part of the main oil gallery is positioned in the side wall of one cylinder cover, and a third part of the main oil gallery is positioned in the side wall of the other cylinder cover. According to the engine lubricating system, the cost of the engine lubricating system can be reduced, and meanwhile, the arrangement of the oil channel does not occupy the volume of an engine.)

1. An engine, characterized in that it comprises a block (1), a crankshaft (2), two cylinder heads (3), a plurality of camshafts (4) and a lubrication system (5);

the crankshaft (2) can be rotatably inserted into the cylinder body (1);

the two cylinder covers (3) cover the top of the cylinder body (1) and are spaced from each other;

a part of the camshaft (4) is rotatably inserted into one of the two cylinder heads (3), the other part of the camshaft (4) is rotatably inserted into the other of the two cylinder heads (3), and the camshaft (4) and the crankshaft (2) are arranged in parallel with each other;

the lubricating system (5) comprises an oil pump (51) and a main oil gallery (52), wherein the oil pump (51) is connected with the outer side wall of the cylinder body (1), a first part of the main oil gallery (52) is positioned in the side wall of the cylinder body (1), a first end of the first part of the main oil gallery (52) is communicated with an oil outlet of the oil pump (51), a second end of the first part of the main oil gallery is used for conveying lubricating oil to the crankshaft (2), a second part and a third part of the main oil gallery (52) are both communicated with the first part of the main oil gallery (52), and the second part and the third part of the main oil gallery (52) are respectively positioned in the side walls of the two cylinder covers (3) so as to respectively lubricate the camshafts (4) positioned in the two cylinder covers (3).

2. The engine of claim 1, characterized in that the main oil gallery (52) includes an oil inlet gallery (521), a crankshaft oil gallery (522), two connecting oil galleries (523), and two sets of camshaft oil galleries (524);

the oil inlet channel (521) is positioned in the side wall of the cylinder body (1), and the first end of the oil inlet channel (521) is communicated with an oil outlet of the oil pump (51);

the crankshaft oil passage (522) is positioned in the side wall of the cylinder body (1), the extending direction of the crankshaft oil passage (522) is the same as the axial direction of the crankshaft (2), and the crankshaft oil passage (522) is communicated with the second end of the oil inlet channel (521);

the cylinder covers (3) of the connecting oil ducts (523) are in one-to-one correspondence, the first parts of the connecting oil ducts (523) are positioned in the side walls of the cylinder bodies (1), the end parts of the connecting oil ducts are communicated with the oil inlet duct (521), the second parts of the connecting oil ducts (523) are positioned in the corresponding side walls of the cylinder covers (3), and the end parts of the connecting oil ducts (523) are communicated with the first parts of the connecting oil ducts (523);

the camshaft oil passages (524) are in one-to-one correspondence with the cylinder covers (3), each camshaft oil passage (524) is located in the corresponding side wall of the cylinder cover (3), the camshaft oil passages (524) are communicated with the corresponding connecting oil passages (523), and the extension direction of the camshaft oil passages (524) is the same as that of the crankshaft oil passages (522).

3. The engine according to claim 2, characterized in that the connecting oil passage (523) includes a first connecting section (5231) and a second connecting section (5232);

a first portion of the first connection section (5231) is located within a side wall of the cylinder block (1), a second portion of the first connection section (5231) is located within a side wall of the corresponding cylinder head (3), and a second connection section (5232) is located within a side wall of the corresponding cylinder head (3);

the first ends of the two first connecting sections (5231) are communicated with the oil inlet channel (521), the two first connecting sections (5231) are inclined to each other, and the included angle between the two first connecting sections (5231) is the same as that between the two cylinder covers (3);

a first end of the second connection section (5232) communicates with a second end of the first connection section (5231), and a second end of the second connection section (5232) communicates with a corresponding camshaft oil passage (524).

4. An engine according to claim 3, characterized in that the angle between two first connection sections (5231) is 60 ° -90 °.

5. The engine according to claim 2, characterized in that the connecting oil passage (523) has a diameter smaller than that of the oil inlet passage (521).

6. The engine according to claim 2, characterized in that it further comprises a filtration module (6);

the mechanical filter module (6) is connected with the outer wall of the cylinder body (1);

the oil inlet channel (521) comprises a first oil inlet channel (5211) and a second oil inlet channel (5212), the first end of the first oil inlet channel (5211) is communicated with an oil outlet of the oil pump (51), and the second end of the first oil inlet channel (5211) is communicated with an oil inlet of the mechanical filter module (6);

the first end of the second oil inlet channel (5212) is communicated with the oil outlet of the machine filter module (6), and the second end of the second oil inlet channel (5212) is communicated with the crankshaft oil channel (522) and the connecting oil channel (523).

7. The engine according to claim 6, characterized in that the machine filter module (6) comprises a filter body (61) and an oil switch (62);

the filter body (61) is connected with the outer wall of the cylinder body (1);

the oil switch (62) is connected with the outer wall of the filter body (61), and the sensing end of the oil switch (62) is located at the oil outlet of the filter module (6).

8. An engine according to claim 6, characterized in that it further comprises a balance shaft lubrication chamber (7), said balance shaft lubrication chamber (7) being located inside the cylinder block (1);

the main oil gallery (52) further comprises a balance shaft oil gallery (525);

the oil passage (525) of the balance shaft is positioned in the side wall of the cylinder body (1), the extending direction of the oil passage (525) of the balance shaft is the same as that of the crankshaft oil passage (522), the first end of the oil passage (525) of the balance shaft is communicated with an oil outlet of the filtering module (6), and the second end of the oil passage (525) of the balance shaft is communicated with the lubricating cavity (7) of the balance shaft.

9. The engine according to claim 6, characterized in that it further comprises a tensioner lubrication chamber (8), said tensioner lubrication chamber (8) being located inside said cylinder (1);

the main oil duct (52) further comprises a tensioner oil duct (526), the tensioner oil duct (526) is located in the side wall of the cylinder body (1), the first end of the tensioner oil duct (526) is communicated with an oil outlet of the filtering module (6), and the second end of the tensioner oil duct (526) is communicated with the tensioner lubrication cavity (8).

10. An engine according to any one of claims 1 to 9, characterized in that it further comprises an oil sump (9) and a collector (10);

the oil pan (9) is connected with the bottom of the cylinder body (1);

the collector (10) is connected with the outer wall of the oil pump (51), the oil inlet of the collector (10) is communicated with the oil pan (9), and the oil outlet of the collector (10) is communicated with the oil inlet of the oil pump (51).

Technical Field

The disclosure belongs to the field of automobiles, and particularly relates to an engine.

Background

The main function of an engine lubricating system is to deliver lubricating oil to various required parts of an engine, lubricate the surfaces of parts, reduce the abrasion loss of moving parts, cool and clean the surfaces of the parts, prevent corrosion of certain parts and the like. The arrangement of the corresponding lubrication systems varies from engine type to engine type.

In the related art, the V-type engine is popular among manufacturers because of its more compact structure, smaller size and lighter weight. The lubricating system of the V-shaped engine generally comprises an oil pump and an external oil pipe, wherein the oil pump pumps lubricating oil into the external oil pipe, and the lubricating oil is introduced into a part needing to be lubricated in the engine through the external oil pipe.

However, since the external structure of the engine is often complex, the cost for fixing and installing the external oil pipe is also high, and the external oil pipe is difficult to arrange due to the space limitation of the engine.

Disclosure of Invention

The embodiment of the disclosure provides an engine, which can reduce the cost of the engine and simultaneously enable the arrangement of an oil passage not to occupy the volume of the engine. The technical scheme is as follows:

the disclosed embodiment provides an engine, which comprises a cylinder block, a crankshaft, two cylinder heads, a plurality of camshafts and a lubricating system;

the crankshaft is rotatably inserted into the cylinder body;

the two cylinder covers cover the top of the cylinder body and are spaced from each other;

one part of the camshaft is rotatably inserted in one of the two cylinder covers, the other part of the camshaft is rotatably inserted in the other of the two cylinder covers, and the camshaft and the crankshaft are arranged in parallel with each other;

the lubricating system comprises an oil pump and a main oil gallery, the oil pump is connected with the outer side wall of the cylinder body, a first part of the main oil gallery is located in the side wall of the cylinder body, a first end of the first part of the main oil gallery is communicated with an oil outlet of the oil pump, a second end of the first part of the main oil gallery is used for conveying lubricating oil to the crankshaft, a second part and a third part of the main oil gallery are both communicated with the first part of the main oil gallery, and the second part and the third part of the main oil gallery are respectively located in the side walls of the two cylinder covers so as to respectively lubricate the camshafts located in the two cylinder covers.

In yet another implementation of the present disclosure, the main oil gallery includes an oil inlet gallery, a crankshaft oil gallery, two connecting oil galleries, and two sets of camshaft oil galleries;

the oil inlet channel is positioned in the side wall of the cylinder body, and the first end of the oil inlet channel is communicated with an oil outlet of the oil pump;

the crankshaft oil duct is positioned in the side wall of the cylinder body, the extension direction of the crankshaft oil duct is the same as the axial direction of the crankshaft, and the crankshaft oil duct is communicated with the second end of the oil inlet duct;

the cylinder covers of the connecting oil ducts correspond to one another, the first parts of the connecting oil ducts are positioned in the side walls of the cylinder bodies, the end parts of the connecting oil ducts are communicated with the oil inlet ducts, the second parts of the connecting oil ducts are positioned in the corresponding side walls of the cylinder covers, and the end parts of the connecting oil ducts are communicated with the first parts of the connecting oil ducts;

the camshaft oil duct is in one-to-one correspondence with the cylinder cover, each camshaft oil duct is located in the corresponding side wall of the cylinder cover, the camshaft oil duct is communicated with the corresponding connecting oil duct, and the extending direction of the camshaft oil duct is the same as that of the crankshaft oil duct.

In yet another implementation of the present disclosure, the connection oil passage includes a first connection section and a second connection section;

the first part of the first connecting section is positioned in the side wall of the cylinder body, the second part of the first connecting section is positioned in the corresponding side wall of the cylinder cover, and the second connecting section is positioned in the corresponding side wall of the cylinder cover;

the first ends of the two first connecting sections are communicated with the oil inlet channel, the two first connecting sections are mutually inclined, and the included angle between the two first connecting sections is the same as that between the two cylinder covers;

the first end of the second connecting section is communicated with the second end of the first connecting section, and the second end of the second connecting section is communicated with the corresponding camshaft oil duct.

In yet another implementation of the present disclosure, the included angle between two of the first connection segments is 60 ° to 90 °.

In yet another implementation of the present disclosure, the connection oil passage includes a first connection section and a second connection section;

the first end of the first connecting section is communicated with the oil inlet channel, and the included angle between the two first connecting sections is the same as the included angle between the two cylinder covers;

the first end of the second connecting section is communicated with the second end of the first connecting section, and the second end of the second connecting section is communicated with each corresponding group of camshaft oil passages.

In still another implementation of the present disclosure, a diameter of the connection oil passage is smaller than a diameter of the oil inlet passage.

In yet another implementation of the present disclosure, the engine further comprises a filter module;

the mechanical filter module is connected with the outer wall of the cylinder body;

the oil inlet channel comprises a first oil inlet channel and a second oil inlet channel, the first end of the first oil inlet channel is communicated with an oil outlet of the oil pump, and the second end of the first oil inlet channel is communicated with an oil inlet of the machine filter module;

the first end of the second oil inlet channel is communicated with the oil outlet of the machine filter module, and the second end of the second oil inlet channel is communicated with the crankshaft oil duct and the connecting oil duct.

In yet another implementation of the present disclosure, the machine filter module includes a filter body and an oil switch;

the filter body is connected with the outer wall of the cylinder body;

the engine oil switch is connected with the outer wall of the filter body, and the sensing end of the engine oil switch is positioned at an oil outlet of the filter module.

In yet another implementation of the present disclosure, the engine further includes a balance shaft lubrication cavity located within the cylinder block;

the main oil gallery further comprises a balance shaft oil gallery;

the balance shaft oil passage is located in the side wall of the cylinder body, the extending direction of the balance shaft oil passage is the same as that of the crankshaft oil passage, the first end of the balance shaft oil passage is communicated with the oil outlet of the filter module, and the second end of the balance shaft oil passage is communicated with the balance shaft lubricating cavity.

In yet another implementation of the present disclosure, the engine further comprises a tensioner lubrication cavity located within the cylinder;

the main oil duct further comprises a tensioner oil duct, the tensioner oil duct is located in the side wall of the cylinder body, a first end of the tensioner oil duct is communicated with the oil outlet of the mechanical filter module, and a second end of the tensioner oil duct is communicated with the tensioner lubrication cavity.

In yet another implementation of the present disclosure, the engine further comprises an oil pan and a collector;

the oil pan is connected with the bottom of the cylinder body;

the collector is connected with the outer wall of the oil pump, an oil inlet of the collector is communicated with the oil pan, and an oil outlet of the collector is communicated with an oil inlet of the oil pump.

The technical scheme provided by the embodiment of the disclosure has the following beneficial effects:

when the engine provided by the embodiment of the disclosure is used, lubricating oil enters the oil pump through the oil inlet of the oil pump, the oil pump outputs the lubricating oil into the main oil duct through the oil outlet of the oil pump, and the lubricating oil lubricates and cools a crankshaft and a camshaft through the main oil duct.

Because the first part of the main oil gallery is positioned in the side wall of the cylinder body, the second part of the main oil gallery is positioned in the side wall of one cylinder cover, and the third part of the main oil gallery is positioned in the side wall of the other cylinder cover, the lubricating oil can be prevented from being conveyed by an external oil pipe, and the cost is greatly reduced. In addition, the arrangement of the oil passage does not occupy the volume of the engine, so that the whole structure of the engine is more compact, and the volume of the whole engine is reduced.

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 structural diagram of a cylinder provided in an embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of a cylinder head provided by an embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of a lubrication system provided by an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of an oil pan provided by the embodiment of the disclosure.

The symbols in the drawings represent the following meanings:

1. a cylinder body; 2. a crankshaft; 3. a cylinder cover; 4. a camshaft;

5. a lubrication system; 51. an oil pump; 52. a main oil gallery; 521. an oil inlet channel; 5211. a first oil inlet channel; 5212. a second oil inlet channel;

522. a crankshaft oil gallery; 5221. a crankshaft oil outlet pipe; 5222. the shaft diameter of the crankshaft; 523. connecting the oil duct; 5231. a first connection section; 5232. a second connection section; 524. a camshaft oil passage; 5241. an intake side camshaft oil passage; 52411. an oil outlet pipe of the camshaft at the air inlet side; 52412. an oil outlet plate of the camshaft at the air inlet side; 52413. an oil outlet pipe of the air inlet side hydraulic tappet; 5242. an exhaust-side camshaft oil passage; 5243. the camshaft is communicated with the oil duct; 52431. a camshaft bearing diameter; 52432. an OCV valve; 525. a balance shaft oil passage; 526. an oil duct of the tensioner;

6. a machine filter module; 61. a filter body; 62. an engine oil switch;

7. a balance shaft lubrication chamber;

8. a tensioner lubrication cavity;

9. an oil pan;

10. a collector.

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.

Fig. 1 is a schematic structural diagram of a cylinder block provided in an embodiment of the present disclosure, fig. 2 is a schematic structural diagram of a cylinder head provided in an embodiment of the present disclosure, and in conjunction with fig. 1 and fig. 2, an engine includes a cylinder block 1, a crankshaft 2, two cylinder heads 3, a plurality of camshafts 4, and a lubrication system 5. The crankshaft 2 is rotatably inserted into the cylinder block 1. The two cylinder heads 3 cover the top of the cylinder body 1 and are spaced from each other. A part of the camshaft 4 is rotatably inserted in one of the two cylinder heads 3, and the other part of the camshaft 4 is rotatably inserted in the other of the two cylinder heads 3, the camshaft 4 and the crankshaft 2 being arranged parallel to each other.

Fig. 3 is a schematic structural diagram of a lubricating system provided in an embodiment of the present disclosure, and as shown in fig. 3, the lubricating system 5 includes an oil pump 51 and a main oil gallery 52, the oil pump 51 is connected to an outer side wall of the cylinder block 1, a first portion of the main oil gallery 52 is located in the side wall of the cylinder block 1, a first end of the first portion of the main oil gallery 52 is communicated with an oil outlet of the oil pump 51, a second end of the first portion is used for delivering lubricating oil to the crankshaft 2, a second portion and a third portion of the main oil gallery 52 are both communicated with the first portion of the main oil gallery 52, and the second portion and the third portion of the main oil gallery 52 are respectively located in side walls of the two cylinder heads 3 to respectively lubricate the camshafts 4 located in the two cylinder heads 3.

When the engine provided by the embodiment of the present disclosure is used, the lubricating oil enters the oil pump 51 through an oil inlet of the oil pump 51, the oil pump 51 outputs the lubricating oil to the main oil gallery 52 through an oil outlet of the oil pump 51, and the lubricating oil lubricates and cools the crankshaft 2 and the camshaft 4 through the main oil gallery 52.

Because the first part of the main oil gallery 52 is located in the side wall of the cylinder block 1, the second part of the main oil gallery 52 is located in the side wall of one of the cylinder heads 3, and the third part of the main oil gallery 52 is located in the side wall of the other cylinder head 3, the external oil pipe can be avoided being used for conveying lubricating oil, and the cost is greatly reduced. In addition, the arrangement of the oil passage does not occupy the volume of the engine, so that the whole structure of the engine is more compact, and the volume of the whole engine is reduced.

In this example, the engine is a V-type engine, in which two cylinder heads 3 are located at the top of the cylinder block 1 in a V-type configuration.

Compared with the straight-line engine with the same cylinder number, the length of the V-shaped engine is greatly shortened, so that the length of an engine compartment can be obviously reduced, the saved space can be utilized on increasing the length of a passenger compartment, and the arrangement of a front compartment is convenient.

With continued reference to fig. 3, the main oil gallery 52 may optionally include an oil inlet gallery 521, a crankshaft oil gallery 522, two connecting oil galleries 523, and two sets of camshaft oil galleries 524. The oil inlet channel 521 is located in the side wall of the cylinder body 1, and a first end of the oil inlet channel 521 is communicated with an oil outlet of the oil pump 51.

The crankshaft oil passage 522 is located in the side wall of the cylinder block 1, the extending direction of the crankshaft oil passage 522 is the same as the axial direction of the crankshaft 2, and the crankshaft oil passage 522 is communicated with the second end of the oil inlet channel 521. The connecting oil ducts 523 are in one-to-one correspondence with the cylinder covers 3, the first parts of the connecting oil ducts 523 are located in the side walls of the cylinder body 1, the end parts of the connecting oil ducts are communicated with the oil inlet duct 521, the second parts of the connecting oil ducts 523 are located in the corresponding side walls of the cylinder covers 3, and the end parts of the connecting oil ducts 523 are communicated with the first parts of the connecting oil ducts 523.

The camshaft oil passages 524 correspond to the cylinder heads 3 one by one, each camshaft oil passage 524 is located in the corresponding side wall of the cylinder head 3, the camshaft oil passages 524 are communicated with the corresponding connecting oil passages 523, and the extending direction of the camshaft oil passages 524 is the same as that of the crankshaft oil passages 522.

In the above implementation, the oil inlet channel 521 is used for conveying the lubricating oil from the oil pump 51 to the crankshaft oil channel 522 and the connecting oil channel 523, and then conveying the lubricating oil to the lubricating cavity where the crankshaft 2 is located through the crankshaft oil channel 522, and at the same time conveying the lubricating oil to the camshaft oil channel 524 through the connecting oil channel 523 to convey the lubricating oil to the lubricating cavity where the camshaft 4 is located through the camshaft oil channel 524.

Alternatively, the connection oil passage 523 includes a first connection section 5231 and a second connection section 5232. A first portion of the first connection section 5231 is located in the side wall of the cylinder block 1, a second portion of the first connection section 5231 is located in the side wall of the corresponding cylinder head 3, and a second connection section 5232 is located in the side wall of the corresponding cylinder head 3.

The first ends of the two first connecting sections 5231 are communicated with the oil inlet channel 521, the two first connecting sections 5231 are inclined to each other, and the included angle between the two first connecting sections 5231 is the same as the included angle between the two cylinder covers 3.

The first end of the second connecting section 5232 is in communication with the second end of the first connecting section 5231, and the second end of the second connecting section 5232 is in communication with the corresponding camshaft oil passage 524.

In the above implementation, the first connecting section 5231 is used to deliver the lubricating oil into the second connecting section 5232 so that the lubricating oil is caused to enter the camshaft oil passage 524 through the second connecting section 5232.

Because two connecting oil ducts 523 are respectively communicated with the camshaft oil ducts 524 on different cylinder covers 3, an included angle between extension lines of the two first connecting sections 5231 is the same as that of the two cylinder covers 3, so that when the two first connecting sections 5231 are communicated with the corresponding camshaft oil ducts 524, the length of the first connecting sections 5231 is reduced as much as possible, the design cost of the connecting oil ducts 523 is reduced, meanwhile, the length of an engine compartment of an engine can be reduced, the gravity center of the engine is relatively low, and the engine is relatively stable.

Alternatively, the included angle between the two first connection sections 5231 is 60 degrees to 90 degrees, and of course, the included angle between the two cylinder heads 3 is also 60 degrees to 90 degrees.

Alternatively, the diameter of the connecting oil passage 523 is smaller than the diameter of the oil inlet passage 521.

The diameter of the connecting oil duct 523 is reduced, so that the volume of the connecting oil duct 523 can be reduced, and the volume of the connecting oil duct 523 occupied in the cylinder cover 3 is reduced, so that the cylinder cover 3 can be made smaller, and the volume of the whole engine is finally reduced. Meanwhile, the diameter of the connecting oil passage 523 is smaller than that of the oil inlet passage 521, so that the oil pressure of the lubricating oil entering the connecting oil passage 523 can be increased due to the fact that the flow aperture of the lubricating oil is reduced, and the lubricating oil can be enabled to flow into the camshaft oil passage 524 quickly to lubricate each part of the camshaft 4.

With continued reference to fig. 3, for example, the side wall of the crankshaft oil passage 522 has a plurality of crankshaft oil outlet pipes 5221 communicated with the inner cavities of the crankshaft oil passage 522, and the lubricating oil in the crankshaft oil passage 522 enters the lubricating cavity where the crankshaft 2 is located through the crankshaft oil outlet pipes 5221 to lubricate the crankshaft 2.

Illustratively, a plurality of crankshaft oil outlet pipes 5221 are uniformly spaced on the side wall of the crankshaft oil passage 522, so that the lubricating oil can uniformly enter the lubricating cavity in which the same crankshaft 2 is located.

With continued reference to fig. 3, an annular crankshaft shaft diameter 5222 is connected to the crankshaft oil outlet pipe 5221, and the crankshaft shaft diameter 5222 has a flow hole for flowing lubricating oil. The crankshaft diameter 5222 delivers the lubricating oil to the outer wall of the crankshaft 2, and during the rotation of the crankshaft 2, the main journal of the crankshaft 2 is lubricated through the through hole in the crankshaft diameter 5222, so that the friction between the crankshaft 2 and the bearing bush sleeved outside the crankshaft is reduced.

In the present embodiment, two camshafts 4 are provided on each cylinder head 3, one camshaft 4 is referred to as an intake-side camshaft, and the other camshaft is an exhaust-side camshaft. Correspondingly, each set of camshaft oil passages 524 includes an intake side camshaft oil passage 5241, an exhaust side camshaft oil passage 5242. The intake side camshaft oil passage 5241 and the exhaust side camshaft oil passage 5242 are arranged in parallel and opposite to each other, and the extending direction of the intake side camshaft oil passage 5241 and the exhaust side camshaft oil passage 5242 is the same as the extending direction of the crankshaft oil passage 522. The intake-side camshaft oil passage 5241 and the exhaust-side camshaft oil passage 5242 are respectively communicated with both ends of the second connecting section 5232 in the connecting oil passage 523.

The camshaft 4 rotates smoothly in the engine, and normal operation of the engine can be ensured. The two camshafts 4 can be smoothly rotated at the same time by supplying the lubricating oil to the intake side camshaft through the intake side camshaft oil passage 5241 and supplying the lubricating oil to the exhaust side camshaft through the exhaust side camshaft oil passage 5242.

In the present embodiment, the intake side camshaft oil passage 5241 and the exhaust side camshaft oil passage 5242 are identical in structure, and only the specific structure of the intake side camshaft oil passage 5241 will be briefly described here.

Optionally, the side wall of the intake side camshaft oil passage 5241 is provided with a plurality of intake side camshaft oil outlet pipes 52411 communicated with the inner cavity of the intake side camshaft oil passage 5241, and the lubricating oil in the intake side camshaft oil passage 5241 enters the lubricating cavity where the intake side camshaft is located through the intake side camshaft oil outlet pipe 52411 to lubricate the intake side camshaft.

In this embodiment, the intake side camshaft oil outlet pipes 52411 are arranged on the side wall of the intake side camshaft oil passage 5241 at regular intervals, so that the lubricating oil can uniformly enter the lubricating cavity where the intake side camshaft is located.

The intake side camshaft oil outlet pipe 52411 is connected with an arc intake side camshaft oil outlet plate 52412, and the intake side camshaft oil outlet plate 52412 can convey lubricating oil to the side wall of the intake side camshaft. In the process of the rotation of the intake side camshaft, the friction force between the intake side camshaft and the cylinder head 3 can be reduced.

The side wall of the intake side camshaft oil passage 5241 is provided with a plurality of intake side hydraulic tappet oil outlet pipes 52413 communicated with the inner cavity of the intake side camshaft oil passage 5241, and lubricating oil in the intake side camshaft oil passage 5241 is conveyed to the hydraulic tappet through the intake side hydraulic tappet oil outlet pipe 52413 to lubricate the hydraulic tappet at the intake side.

Illustratively, a camshaft bearing diameter 52431 which is communicated with the inner cavity of the camshaft communication oil passage 5243 is arranged on the side wall of any one camshaft communication oil passage 5243, and a through hole for flowing lubricating oil is formed in each camshaft bearing diameter 52431.

The camshaft bearing diameter 52431 delivers lubrication oil to the camshaft bearings. Therefore, the friction force between the bearing of the camshaft and the camshaft can be reduced in the rotation process of the camshaft.

In this embodiment, the engine further includes a bearing cap, and the bearing cap is connected with the top of the cylinder head. A bearing is arranged between the bearing cover and the cylinder cover and is sleeved on the camshaft. The bearing cover is provided with a camshaft phaser. An OCV (Oil control valve) is connected to the camshaft phaser. Each set of camshaft oil passage 524 further includes a camshaft communication oil passage 5243, a first end of the camshaft communication oil passage 5243 is communicated with the second connection section 5232, and a second end of the camshaft communication oil passage 5243 is communicated with an oil inlet of the OCV valve, so that oil passages of different oil chambers in the camshaft phaser can be controlled through the OCV valve.

With continued reference to fig. 3, the engine optionally further includes a mechanical filter module 6. The mechanical filter module 6 is connected with the outer wall of the cylinder body 1.

The oil inlet channel 521 comprises a first oil inlet channel 5211 and a second oil inlet channel 5212, a first end of the first oil inlet channel 5211 is communicated with an oil outlet of the oil pump 51, and a second end of the first oil inlet channel 5211 is communicated with an oil inlet of the filter module 6. A first end of the second oil inlet duct 5212 is communicated with an oil outlet of the mechanical filter module 6, and a second end of the second oil inlet duct 5212 is communicated with the crankshaft oil duct 522 and the connecting oil duct 523.

The first oil inlet passage 5211 is used for conveying lubricating oil into the mechanical filter module 6 so as to clean, cool, etc. the lubricating oil through the mechanical filter module 6, and the second oil inlet passage 5212 is used for conveying the lubricating oil treated by the mechanical filter module 6 into the crankshaft oil passage 522 and the connecting oil passage 523.

In this embodiment, the oil filter module 6 is a component formed by integrating an oil cooler and an oil filter, and the engine oil provided by the embodiment of the present disclosure directly integrates the oil cooler and the oil filter, which not only effectively reduces the cost of the engine, but also makes the arrangement of the engine more compact.

Optionally, the filtration module 6 includes a filter body 61 and an oil switch 62. The filter body 61 is connected to the outer wall of the cylinder 1.

The oil switch 62 is connected with the outer wall of the filter body 61, and the sensing end of the oil switch 62 is located at the oil outlet of the filter module 6.

The filter body 61 is used for filtering and cooling the lubricating oil. The oil pressure of the lubricating oil can be reduced in the flowing process, when the lubricating oil just flows out of the oil outlet of the filter body 61, the lubricating oil must have a certain oil pressure, namely the oil pressure is the maximum at the oil outlet, the oil pressure at the oil outlet of the filter body 61 is monitored through the oil switch 62, and the normal work of the whole engine lubricating system can be ensured. When the oil switch 62 detects that the oil pressure at the oil outlet of the filter body 61 is 0 or lower than the minimum value of the actual requirement, which is generally set according to the actual working condition, the oil switch 62 automatically gives an alarm to prompt the operator, and simultaneously feeds the oil pressure at the oil outlet of the filter body 61 back to the oil pump 51 in the form of an electric signal, and the oil pump 51 receives the electric signal and controls the oil pressure at the oil outlet of the oil pump 51 again according to the oil pressure indicated by the electric signal, so that the oil pressure of the lubricating oil is adjusted again, and thus, all parts of the engine are lubricated, and the real-time adjustment of the oil pressure of the engine lubricating system is realized.

With continued reference to fig. 3, the engine optionally further comprises a balance shaft lubrication chamber 7, the balance shaft lubrication chamber 7 being located within the cylinder block 1. The main oil gallery 52 also includes a balance shaft oil gallery 525. The balance shaft oil passage 525 is located in the side wall of the cylinder body 1, the extending direction of the balance shaft oil passage 525 is the same as that of the crankshaft oil passage 522, the first end of the balance shaft oil passage 525 is communicated with an oil outlet of the filter module 6, and the second end of the balance shaft oil passage 525 is communicated with the balance shaft lubricating cavity 7.

The balance shaft oil passage 525 is used to deliver lubricating oil into the balance shaft lubricating chamber 7 so as to lubricate the balance shaft. Because the lubricating oil of the balance shaft oil duct 525 is taken from the lubricating oil filtered by the filter module 6, the cleanness of the lubricating oil of the engine can be ensured, and the shaft diameter of the balance shaft is prevented from being damaged by foreign matters.

In this embodiment, in order to ensure reliable sealing of the balance shaft oil passage 525, an O-ring is added in front of the balance shaft oil passage 525 and the oil outlet of the mechanical filter module 6 for sealing connection.

With continued reference to fig. 3, optionally, the engine further comprises a tensioner lubrication cavity 8, the tensioner lubrication cavity 8 being located within the cylinder 1. The main oil passage 52 further comprises a tensioner oil passage 526, the tensioner oil passage 526 is located in the side wall of the cylinder body 1, a first end of the tensioner oil passage 526 is communicated with the oil outlet of the filtration module 6, and a second end of the tensioner oil passage 526 is communicated with the tensioner lubrication cavity 8.

The tensioner oil passage 526 is used for conveying lubricating oil into the tensioner lubrication chamber 8 so as to lubricate the tensioner. Because the lubricating oil in the tensioner oil duct 526 is filtered by the mechanical filter module 6, the lubricating oil entering the tensioner is clean, and the tensioner is prevented from being damaged, pulled and the like by sundries.

Fig. 4 is a schematic structural diagram of an oil pan provided by the embodiment of the disclosure, and in combination with fig. 4, the engine further optionally includes an oil pan 9 and a collector 10. The oil pan 9 is connected to the bottom of the cylinder block 1. The collector 10 is connected with the outer wall of the oil pump 51, the oil inlet of the collector 10 is communicated with the oil pan 9, and the oil outlet of the collector 10 is communicated with the oil inlet of the oil pump 51.

The collector 10 is for lubricating oil in the oil pan 9. The collector 10 is communicated with an oil inlet of the oil pump 51, so that the oil pump 51 can output the lubricating oil in the oil pan 9 for lubrication again, and thus the engine lubrication system forms a circulation system. In addition, the collector 10 is integrated on the oil pump 51, which reduces the volume of the engine.

In the present embodiment, the above-described oil passages are all formed in the side walls of the cylinder block 1 and the cylinder head 3 by casting.

In the embodiment of the disclosure, in order to reduce the machining cost, the oil passages are respectively processed by casting, so that on one hand, the design of the oil passages can be more flexible, and on the other hand, the machining cost of the oil passages is reduced.

Meanwhile, when the tail ends of the oil passages need to be sealed, the tail ends of the oil passages can be sealed through a rivet pulling process.

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.