CN111206974B

CN111206974B - Engine and vehicle

Info

Publication number: CN111206974B
Application number: CN201811393097.1A
Authority: CN
Inventors: 于航
Original assignee: Borgward Automotive China Co Ltd
Current assignee: Borgward Automotive China Co Ltd
Priority date: 2018-11-21
Filing date: 2018-11-21
Publication date: 2021-03-26
Anticipated expiration: 2038-11-21
Also published as: CN111206974A

Abstract

The engine comprises a cylinder body, an oil pan, an oil pump and an oil pressure limiting valve, wherein the oil pressure limiting valve is installed on the cylinder body, a pressure limiting valve accommodating cavity is formed in the cylinder body, the oil pressure limiting valve is inserted into the pressure limiting valve accommodating cavity from the outer side of the cylinder body, a first oil duct, a second oil duct and a third oil duct are formed in the cylinder body, the first oil duct is communicated with a main oil duct of the cylinder body and an oil inlet of the oil pressure limiting valve, the second oil duct is communicated with an oil drainage port of the oil pressure limiting valve and the oil pan, and the third oil duct is communicated with a feedback oil port of the oil pressure limiting valve and a feedback oil cavity of the oil pump. The engine provided by the disclosure integrates the engine oil pressure limiting valve on the outer surface of the cylinder body, simplifies the disassembly and assembly difficulty, saves the maintenance cost, and can also make the structure of the oil pan simpler, thereby reducing the failure rate of the oil pan.

Description

Engine and vehicle

Technical Field

The disclosure relates to the field of engines, in particular to an engine and a vehicle.

Background

Currently, an oil pressure limiting valve is commonly used on an engine to limit the oil pressure output by an oil pump, and the oil pressure limiting valve is commonly integrated on an oil pan or the oil pump. When the engine oil pressure limiting valve integrated on the engine oil pump is disassembled, the oil pan of the engine needs to be disassembled, so that the disassembling difficulty of the engine oil pressure limiting valve is increased; when the engine oil pressure limiting valve integrated on the oil pan is disassembled and assembled, the engine can be disassembled and assembled only by hanging or lifting the engine, and the difficulty in disassembling and assembling the engine oil pressure limiting valve is increased.

Disclosure of Invention

The purpose of this disclosure is to provide an engine convenient to machine oil pressure limiting valve dismouting.

In order to achieve the above object, an aspect of the present disclosure provides an engine, including a cylinder block, an oil pan, an oil pump, and an oil pressure limiting valve, where the oil pressure limiting valve is installed on the cylinder block, a pressure limiting valve accommodating cavity is formed on the cylinder block, the oil pressure limiting valve is inserted into the pressure limiting valve accommodating cavity from an outer side of the cylinder block, a first oil passage, a second oil passage, and a third oil passage are formed in the cylinder block, the first oil passage communicates a main oil passage of the cylinder block and an oil inlet of the oil pressure limiting valve, the second oil passage communicates an oil drain port of the oil pressure limiting valve and the oil pan, and the third oil passage communicates a feedback oil port of the oil pressure limiting valve and a feedback oil cavity of the oil pump.

Optionally, an inclined oil passage is further formed in the cylinder block, one end of the inclined oil passage is connected with the main oil passage, the other end of the inclined oil passage is connected with a crankshaft hole of the cylinder block, the first oil passage comprises a horizontal section and a vertical section, the inner end of the horizontal section is connected with the inclined oil passage, the outer end of the horizontal section extends to the outer surface of the cylinder block, the vertical section is divided into an upper section and a lower section by the pressure limiting valve accommodating cavity, the upper end of the upper section is connected with the horizontal section, and the lower end of the lower section extends to the bottom surface of the cylinder block.

Optionally, the outer end of the horizontal section is blocked closed.

Optionally, the engine further comprises an oil deflector mounted on a bottom surface of the cylinder block, a lower end of the lower section being closed by the oil deflector.

Optionally, the second oil passage extends in a vertical direction, an upper end of the second oil passage is connected to the pressure limiting valve accommodating cavity, and a lower end of the second oil passage extends to the bottom surface of the cylinder block.

Optionally, the engine further comprises an oil baffle plate, the oil baffle plate is mounted on the bottom surface of the cylinder body, a first via hole oil passage is formed in the oil baffle plate, one end of the first via hole oil passage is communicated with the lower end of the second oil passage, and the other end of the first via hole oil passage is communicated with the inner space of the oil pan.

Optionally, the third oil passage extends in a vertical direction, an upper end of the third oil passage is connected to the pressure limiting valve accommodating cavity, and a lower end of the third oil passage extends to the bottom surface of the cylinder block.

Optionally, the engine further includes an oil baffle plate, the oil baffle plate is mounted on the bottom surface of the cylinder block, a second via-hole oil passage is formed in the oil baffle plate, one end of the second via-hole oil passage is communicated with the lower end of the third oil passage, and the other end of the second via-hole oil passage is communicated with a feedback oil cavity of the oil pump.

Optionally, a mounting flange is formed on an exposed portion of the oil pressure limiting valve, and the mounting flange is mounted to the cylinder block by a fastener.

Another aspect of the present disclosure also provides a vehicle including the engine as described above.

Through above-mentioned technical scheme, the engine that this disclosure provided is integrated on cylinder body surface with machine oil pressure limiting valve, and the dismouting is simple, convenient, specifically, for with machine oil pressure limiting valve integration on the oil pan, need not to hang the whole car or lift when dismouting machine oil pressure limiting valve, also need not to dismantle oil pan and cylinder body, has simplified the dismouting degree of difficulty, practices thrift the maintenance cost, can also make the structure of oil pan simpler, and then reduces the fault rate of oil pan.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

FIG. 1 is a schematic perspective view of an engine in an embodiment of the present disclosure;

FIG. 2 is a schematic perspective view of an oil pressure limiting valve in an embodiment of the present disclosure;

FIG. 3 is a side view of an oil pressure limiting valve in an embodiment of the present disclosure;

FIG. 4 is a schematic perspective view of a valve element of an oil pressure limiting valve according to an embodiment of the present disclosure;

FIG. 5 is a side view of a spool of the oil pressure limiting valve in an embodiment of the present disclosure;

FIG. 6 is a longitudinal cross-sectional view of the engine of FIG. 1 taken along an axis of the oil pressure limiting valve;

FIG. 7 is a longitudinal cross-sectional view of the engine of FIG. 1 taken along the axis of the oil pressure limiting valve.

Description of the reference numerals

1 cylinder body 2 oil pan

3 oil pump 4 machine oil pressure limiting valve

5 block 6 valve body

7 mounting flange 8 wiring harness plug

9 oil inlet and 10 oil drain port

11 feedback oil port 12 valve core

13 first recess 14 second recess

15 main oil gallery 16 first oil gallery

161 horizontal segment 162 vertical segment

1621 upper segment 1622 lower segment

17 second oil passage 18 third oil passage

19 inclined oil passage 20 crankshaft hole

21 oil baffle plate 22 control part

23 pressure limiting valve accommodating cavity

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, it is to be understood that the terms "upper", "lower", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present disclosure, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present disclosure.

Referring to fig. 1 and 2, an engine provided by the embodiment of the present disclosure includes a cylinder block 1, an oil pan 2, an oil pump 3, and an oil pressure limiting valve 4, the oil pressure limiting valve 4 being mounted on the cylinder block 1, the oil pan 2 being mounted at the bottom of the cylinder block 1, the oil pump 3 being mounted inside the oil pan 2 and also at the bottom of the cylinder block 1. The oil pump 3 is a variable pump.

Specifically, a pressure limiting valve accommodating chamber 23 is formed in the cylinder block 1, and for example, the pressure limiting valve accommodating chamber 23 may be opened inward in the outer surface of the cylinder block so that the oil pressure limiting valve 4 may be inserted into the pressure limiting valve accommodating chamber 23 from the outside of the cylinder block 1. The oil pressure-limiting valve 4 comprises a valve body 6 and a control part 22, the size of the pressure-limiting valve accommodating cavity 23 is designed to be just capable of accommodating the valve body 6 part of the oil pressure-limiting valve 4, so that the valve body 6 can be completely inserted into the pressure-limiting valve accommodating cavity 23, and the control part 22 is positioned on the outer side of the outer surface of the cylinder body 1. Alternatively, the mounting flange 7 may be formed on the control portion 22 of the oil pressure limiting valve 4, and a mounting hole may be formed on an outer surface of an opening of the pressure limiting valve accommodating cavity 23, when the oil pressure limiting valve 4 is inserted into the pressure limiting valve accommodating cavity 23, the mounting flange 7 is fastened to the mounting hole by a fastener (e.g., a bolt, a rivet, etc.), so that the oil pressure limiting valve 4 is mounted to the cylinder block 1, and since the mounting flange 7 is exposed to the outer surface of the cylinder block 1, the mounting and dismounting operation may be directly performed on the outer surface of the cylinder block 1, which is very convenient. Alternatively, the control portion 22 of the oil pressure limiting valve 4 may be formed with a harness plug 8, and the harness plug 8 is exposed to the outer surface of the cylinder block 1 to facilitate the insertion of a harness.

Referring to fig. 3 to 5, the valve body 6 of the oil pressure limiting valve 4 is provided with an oil inlet 9, an oil drain 10 and a feedback oil port 11, and the valve body 6 further includes a valve core 12 in an internal cavity thereof, one end of the valve core 12 is connected to a control part 22, and the valve core 12 can move back and forth relative to the valve body 6 under the control of the control part 22. A first groove 13 and a second groove 14 are also formed on the spool 12, the first groove 13 and the second groove 14 are annular grooves, and the outer diameter of the spool 12 is equal to the inner diameter of the valve body 6, so that the engine oil cannot flow between the first groove 13 and the second groove 14. The valve core 12 can be moved to enable the first groove 13 to be communicated with the oil inlet 9 and the feedback oil port 11, or enable the second groove 14 to be communicated with the feedback oil port 11 and the oil drainage port 10, so that the oil pressure of the oil pump 3 can be adjusted.

Further, referring to fig. 6, a main oil gallery 15 for supplying oil to each lubrication portion of the engine is formed in the cylinder block 1. Since the oil pressure-limiting valve 4 is installed on the cylinder block 1, it is also necessary to form a first oil passage 16, a second oil passage 17, and a third oil passage 18 in the cylinder block 1 in order to ensure normal use of the oil pressure-limiting valve 4. The first oil duct 16 is communicated with the main oil duct 15 of the cylinder body 1 and the oil inlet 9 of the engine oil pressure limiting valve 4, the second oil duct 17 is communicated with the oil drainage port 10 of the engine oil pressure limiting valve 4 and the oil pan 2, and the third oil duct 18 is communicated with the feedback oil port 11 of the engine oil pressure limiting valve 4 and the feedback oil cavity of the engine oil pump 3. Thus, when the output oil pressure value in the oil pump 3 is too large, the oil pressure limiting valve 4 moves to a position where the oil inlet 9 and the feedback oil port 11 are communicated, the oil in the oil pump 3 enters the main oil gallery 15, flows into the first oil gallery 16 from the main oil gallery 15, flows into the pressure limiting valve accommodating cavity 23 from the first oil gallery 16, flows into the oil pressure limiting valve 4 from the oil inlet 9 of the oil pressure limiting valve 4, flows out from the feedback oil port 11, and flows into the feedback oil cavity of the oil pump 3 through the third oil gallery 18, so that the flow or the oil pressure value of the oil pressure cavity of the oil pump 3 is reduced; when the output oil pressure value in the oil pump 3 is too small, the oil pressure limiting valve 4 moves to a position where the feedback oil port 11 is communicated with the oil drain port 10, and the oil in the feedback oil cavity of the oil pump 3 flows to the feedback oil port 11 of the oil pressure limiting valve 4 through the third oil duct 18, flows out of the oil drain port 10 through the oil pressure limiting valve 4, and flows into the oil pan 2 through the second oil duct 17, so that the pressure of the feedback oil cavity of the oil pump 3 can be released, and the flow or the oil pressure value of the oil pressure cavity of the oil pump 3 can be increased.

A specific arrangement of the first oil passage 16, the second oil passage 17, and the third oil passage 18 in the cylinder block 1 will be described below, but the specific arrangement shown in the present disclosure is merely a preferred embodiment, and other arrangements will fall within the scope of the present disclosure.

With continued reference to fig. 6, a slant oil passage 19 is formed in the cylinder block 1, one end of the slant oil passage 19 is connected to the main oil passage 15, and the other end of the slant oil passage 19 is connected to a crank bore 20 of the cylinder block 1, so that the oil in the main oil passage 15 can be introduced into the crank bore 20 through the slant oil passage 19 to lubricate the crankshaft.

The first oil passage 16 includes a horizontal section 161 and a vertical section 162, which is beneficial to simplify the processing process, wherein the inner end of the horizontal section 161 is connected to the inclined oil passage 19, and the outer end of the horizontal section 161 extends to the outer surface of the cylinder block 1 and is sealed, for example, the outer end of the horizontal section 161 can be sealed by a plug 5 (such as a rubber plug) or a cover or the like, without limitation; the vertical section 162 of the first oil passage 16 is divided into an upper section 1621 and a lower section 1622 by the pressure limiting valve accommodating cavity 23, the upper end of the upper section 1621 is connected with the horizontal section 161 for conveying oil, the lower end of the lower section 1622 extends to the bottom surface of the cylinder block 1 and is sealed, and when the upper section 1621 is machined, drilling machining needs to be started from the bottom surface of the cylinder block, so that the lower section 1622 of the first oil passage 16 can exist after machining is completed, and in other embodiments, the upper section 1621 of the first oil passage 16 can be machined vertically after transverse machining, and the disclosure is not limited herein. The engine in the embodiment of the present disclosure may further include an oil deflector 21, the oil deflector 21 being mounted on the bottom surface of the cylinder block 1, and the lower end of the lower section 1622 of the first oil passage 16 being closed by the oil deflector 21.

The second oil duct 17 extends from the oil drain port 10 of the engine oil pressure limiting valve 4 along the vertical direction, the upper end of the second oil duct 17 is connected with the pressure limiting valve accommodating cavity 23, and the lower end of the second oil duct 17 extends to the bottom surface of the cylinder body 1; an oil baffle plate 21 may be installed on the bottom surface of the cylinder block 1, a first via-hole oil passage (not shown in the drawings) is formed in the oil baffle plate 21, one end of the first via-hole oil passage is communicated with the lower end of the second oil passage 17, the other end of the first via-hole oil passage is communicated with the internal space of the oil pan 2, and the engine oil flows into the second oil passage 17 and the first via-hole oil passage from the oil drain port 10 of the oil pressure limiting valve 4 and then directly flows into the internal space of the oil pan 2.

The third oil duct 18 extends from the feedback oil port 11 of the engine oil pressure limiting valve 4 along the vertical direction, the upper end of the third oil duct 18 is connected with the pressure limiting valve accommodating cavity 23, and the lower end of the third oil duct 18 extends to the bottom surface of the cylinder body 1; the oil pump 3 can be installed on an oil baffle plate 21 on the bottom surface of the cylinder block 1, a second via-hole oil duct (not shown in the figure) is further formed in the oil baffle plate 21, one end of the second via-hole oil duct is communicated with the lower end of the third oil duct 18, the other end of the second via-hole oil duct is communicated with a feedback oil cavity of the oil pump 3, and the oil flows into the third oil duct 18 and the second via-hole oil duct from a feedback oil port 11 of the oil pressure limiting valve 4 and then flows into the feedback oil cavity of the oil pump 3.

The first oil passage 16, the second oil passage 17, the third oil passage 18 and the inclined oil passage 19 described above may also be located in the same plane, so that the length of each oil passage is minimized, which may reduce the machining cost on the one hand, and may also reduce the distance of the oil flow path on the other hand, thereby improving the circulation efficiency of the oil.

The working principle of the oil pump 3 regulated using the oil pressure limiting valve 4 is as follows, in connection with the structure of the engine integrated with the oil pressure limiting valve 4 as explained in fig. 1, fig. 2 and above:

when the output oil pressure value in the oil pump 3 is too large, the oil pressure limiting valve 4 moves to a position where the first groove 13 is communicated with the oil inlet 9 and the feedback oil port 11, the oil in the oil pump 3 enters the main oil duct 15 and enters the inclined oil duct 19 from the main oil duct 15, a part of the oil in the inclined oil duct 19 flows into the crankshaft hole 20 to lubricate the crankshaft, the other part of the oil flows into the pressure limiting valve accommodating cavity 23 through the horizontal section 161 of the first oil duct 16 and the upper section 1621 of the vertical section 162, flows into the first groove 13 of the oil pressure limiting valve 4 through the oil inlet 9 of the oil pressure limiting valve 4 and further flows into the feedback oil port 11, and flows into the feedback oil cavity of the oil pump 3 through the third oil duct 18 and the second via oil duct, so that the oil pressure value of the feedback oil cavity is increased, the oil pressure value and the flow rate of the oil pressure cavity of the oil pump.

When the output oil pressure value in the oil pump 3 is too small, the oil pressure limiting valve 4 moves to a position where the second groove 14 is communicated with the feedback oil port 11 and the oil drainage port 10, the oil in the feedback oil cavity of the oil pump 3 flows to the feedback oil port 11 of the oil pressure limiting valve 4 through the second via-hole oil duct and the third oil duct 18, flows into the second groove 14 of the oil pressure limiting valve 4 through the feedback oil port 11, further flows to the oil drainage port 10, and flows into the oil pan 2 through the second oil duct 17 and the first via-hole oil duct, so that the pressure of the feedback oil cavity of the oil pump 3 can be released, the oil pressure value and the flow rate of the oil pressing cavity of the oil pump 3 are increased, and the output oil pressure value of the.

Another embodiment of the present disclosure also provides a vehicle including the engine as described above.

In summary, the engine provided by the disclosure integrates the oil pressure limiting valve on the outer surface of the cylinder body, and is simple and convenient to disassemble and assemble, and specifically, compared with the case that the oil pressure limiting valve is integrated on the oil pan, the engine does not need to be hung or lifted when the oil pressure limiting valve is disassembled and assembled, and the oil pan and the cylinder body do not need to be disassembled, so that the disassembling and assembling difficulty is simplified, the maintenance cost is saved, the structure of the oil pan can be simpler, and the fault rate of the oil pan is further reduced; and the outer surface of the engine is provided with the pressure limiting valve accommodating cavity, so that the valve body of the engine oil pressure limiting valve is positioned in the pressure limiting valve accommodating cavity, the control part and the mounting flange of the engine oil pressure limiting valve are exposed out of the outer surface of the cylinder body, the assembly and disassembly operation can be directly carried out on the outer surface of the cylinder body, and the engine oil pressure limiting valve is very convenient. In addition, the first oil channel comprises a horizontal section and a vertical section, which is beneficial to simplifying the processing technology; the first oil duct, the second oil duct, the third oil duct and the inclined oil duct are located in the same plane, so that the length of each oil duct is the minimum, the processing cost is reduced, and the circulation efficiency of engine oil is improved.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, various possible combinations will not be separately described in this disclosure.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims

1. The engine is characterized by comprising a cylinder body (1), an oil pan (2), an oil pump (3) and an oil pressure limiting valve (4), wherein the oil pressure limiting valve (4) is installed on the cylinder body (1), a pressure limiting valve accommodating cavity (23) is formed in the cylinder body (1), the oil pressure limiting valve (4) is inserted into the pressure limiting valve accommodating cavity (23) from the outer side of the cylinder body (1), a first oil duct (16), a second oil duct (17) and a third oil duct (18) are formed in the cylinder body (1), the first oil duct (16) is communicated with a main oil duct (15) of the cylinder body (1) and an oil inlet (9) of the oil pressure limiting valve (4), the second oil duct (17) is communicated with an oil drainage port (10) of the oil pressure limiting valve (4) and the oil pan (2), and the third oil duct (18) is communicated with a feedback oil port (11) of the oil pressure limiting valve (4) and a reverse oil port of the oil pump (3) An oil feeding cavity;

the cylinder block (1) is internally provided with an inclined oil channel (19), one end of the inclined oil channel (19) is connected with the main oil channel (15), the other end of the inclined oil channel (19) is connected with a crankshaft hole (20) of the cylinder block (1), the first oil channel (16) comprises a horizontal section (161) and a vertical section (162), the inner end of the horizontal section (161) is connected with the inclined oil channel (19), the outer end of the horizontal section (161) extends to the outer surface of the cylinder block (1), the vertical section (162) is divided into an upper section (1621) and a lower section (1622) by the pressure limiting valve accommodating cavity (23), the upper end of the upper section (1621) is connected with the horizontal section (161), and the lower end of the lower section (1622) extends to the bottom surface of the cylinder block (1).

2. An engine according to claim 1, characterized in that the outer end of the horizontal section (161) is closed by a plug (5).

3. The engine of claim 1, further comprising an oil deflector (21), the oil deflector (21) being mounted on a bottom surface of the cylinder block (1), a lower end of the lower section (1622) being closed by the oil deflector (21).

4. The engine according to claim 1, characterized in that the second oil passage (17) extends in a vertical direction, an upper end of the second oil passage (17) is connected to the pressure limiting valve accommodating chamber (23), and a lower end of the second oil passage (17) extends to a bottom surface of the cylinder block (1).

5. The engine according to claim 4, characterized in that the engine further comprises an oil baffle plate (21), the oil baffle plate (21) is mounted on the bottom surface of the cylinder block (1), a first via oil passage is formed in the oil baffle plate (21), one end of the first via oil passage communicates with the lower end of the second oil passage (17), and the other end of the first via oil passage communicates with the internal space of the oil pan (2).

6. The engine according to claim 1, characterized in that the third oil passage (18) extends in a vertical direction, an upper end of the third oil passage (18) is connected to the pressure limiting valve accommodating chamber (23), and a lower end of the third oil passage (18) extends to a bottom surface of the cylinder block (1).

7. The engine according to claim 6, characterized in that the engine further comprises an oil baffle plate (21), the oil baffle plate (21) is mounted on the bottom surface of the cylinder block (1), a second via oil passage is formed in the oil baffle plate (21), one end of the second via oil passage communicates with the lower end of the third oil passage (18), and the other end of the second via oil passage communicates with a feedback oil chamber of the oil pump (3).

8. An engine according to any of claims 1 to 7, characterized in that a mounting flange (7) is formed on the exposed part of the oil pressure limiting valve (4), the mounting flange (7) being mounted to the cylinder block (1) by fasteners.

9. A vehicle, characterized in that the vehicle comprises an engine according to any one of claims 1-8.