CN214403783U

CN214403783U - Oil circuit structure of engine cylinder cover system

Info

Publication number: CN214403783U
Application number: CN202120502809.XU
Authority: CN
Inventors: 李民; 胡佳佳; 崔晓敏; 李进
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2021-03-09
Filing date: 2021-03-09
Publication date: 2021-10-15
Anticipated expiration: 2031-03-09

Abstract

The utility model provides an engine cylinder lid system oil circuit structure, it is including the main oil gallery that constructs in the cylinder cap, with the horizontal oil duct of main oil duct intercommunication, and communicate in the exhaust side oil circuit of horizontal oil duct one end, wherein, exhaust side oil circuit includes the exhaust side main oil duct that links to each other with horizontal oil duct, and the first intercommunication oil duct that links to each other with exhaust side main oil duct, first intercommunication oil duct links to each other with exhaust camshaft lubricating oil duct and exhaust VVT intercommunication oil circuit, and first intercommunication oil duct links to each other with the camshaft lubricating oil duct that admits air through second intercommunication oil duct. The utility model discloses an engine cylinder lid system oil circuit structure can do benefit to the lubrication of air intake camshaft, exhaust camshaft and the response of exhaust VVT phaser, has compact structure, simple characteristics, and does benefit to the development cost that reduces the cylinder cap to better result of use has.

Description

Oil circuit structure of engine cylinder cover system

Technical Field

The utility model relates to an engine lubrication technical field, in particular to engine cylinder lid system oil circuit structure.

Background

In order to meet the increasingly stringent requirements of the engine on power performance, economy, emission and the like, the technical upgrading of the engine is not slow. Such as VVT (variable valve timing technology), HLA (hydraulic tappet technology), and direct injection in-cylinder technology, are commonly used in engines. However, the application of many technologies increases the engine performance and also increases the cost greatly.

At present, the engine adopts a single VVT technology and a double VVT technology, and for the engine adopting the single VVT technology, the dynamic property of partial working conditions can be improved only by simply increasing the exhaust VVT technology. For a gasoline engine with slightly lower performance, such as a gasoline engine adopting turbocharging, air passage injection and a cup tappet, an exhaust VVT (variable valve timing) is also added, so that the requirement of improving the low-speed performance can be met. For this reason, cost and performance become an important topic.

In the lubricating oil passage of the double VVT engine in the prior art, some oil is provided as an air inlet VVT oil passage, an air outlet VVT oil passage, an air inlet HLA oil passage and an air outlet HLA oil passage, and the problem that the oil pressure at the air inlet side and the oil pressure at the air outlet side influence each other exists. In addition, most of the existing direct-injection gasoline engines adopt two cylinder cover main oil ducts, and the structural design increases the number of parts, and has complex assembly process and higher cost. Therefore, the oil circuit of the cylinder cover system is urgently needed to be improved, and the structure is simple and the cost is low under the condition of meeting performance requirements.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing an engine cylinder head system oil circuit structure to under the condition that satisfies the performance demand, can reduce the development cost of cylinder cap.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

an oil circuit structure of an engine cylinder cover system, which comprises a main oil channel constructed in a cylinder cover, a transverse oil channel communicated with the main oil channel, and an exhaust side oil circuit communicated with one end of the transverse oil channel, wherein:

the exhaust side oil way comprises an exhaust side main oil way connected with the transverse oil way and a first communicating oil way connected with the exhaust side main oil way, the first communicating oil way is connected with an exhaust camshaft lubricating oil passage and an exhaust VVT communicating oil way, and the first communicating oil way is connected with an intake camshaft lubricating oil passage through a second communicating oil way.

Further, the both ends of cylinder cap are provided with the mount pad in order to install intake camshaft and exhaust camshaft respectively, in one end the mount pad with be equipped with between the exhaust camshaft with the annular oil groove of exhaust side main oil gallery intercommunication, and in the bottom of annular oil groove be equipped with the first connecting oil hole that exhaust camshaft lubrication oil duct links to each other, just annular oil groove with first connecting oil hole constitutes first intercommunication oil duct.

Further, the annular oil groove is configured on an outer peripheral surface of the exhaust camshaft.

Further, the first connecting oil holes are circumferentially spaced around the annular oil groove.

Furthermore, an exhaust camshaft oil outlet communicated with the exhaust camshaft lubricating oil channel is formed in a shaft neck of the exhaust camshaft.

Further, the exhaust VVT communication oil passage includes an exhaust VVT communication hole formed at one end of the exhaust camshaft, the exhaust VVT communication hole is communicated with the exhaust camshaft lubricating oil passage, the first connection oil hole is connected to the exhaust VVT communication hole, and an exhaust VVT control valve is provided in the exhaust VVT communication hole.

Further, a throttle valve is provided in the exhaust camshaft lubricating oil passage, close to the exhaust VVT communication hole.

Furthermore, the mount pad has with the bearing frame of holding intake camshaft with exhaust camshaft, and correspond the bearing cap that the bearing frame set up, second intercommunication oil duct structure in on the bearing cap, just one end of second intercommunication oil duct with annular oil groove intercommunication, the other end through structure in intake camshaft last inlet with intake camshaft lubricated oil duct links to each other.

Further, the other end of the transverse oil passage is connected with the intake VVT oil passage, relative to the end connected with the exhaust side oil passage.

Furthermore, the transverse oil passage is connected with the intake VVT oil passage through an intake side oil passage constructed on the cylinder cover, and an intake VVT control valve is arranged in the intake side oil passage.

Compared with the prior art, the utility model discloses following advantage has:

(1) engine cylinder lid system oil circuit structure, through main oil duct and horizontal oil duct and the exhaust side oil circuit that sets up, can realize doing benefit to exhaust VVT's response simultaneously to air intake camshaft, exhaust camshaft's lubrication, and this engine cylinder lid system oil circuit structure has compact structure, simple characteristics, simultaneously for the cylinder cap is less than in the change of original structure, thereby can do benefit to the development cost that reduces the cylinder cap, and has better result of use.

(2) The first communicating oil duct adopts the annular oil groove and the first connecting oil hole, so that the structure is simple, and the structure of the oil path is more compact.

(3) The first communicating oil duct is arranged on the exhaust cam shaft, so that the exhaust cam shaft is convenient to machine and form and low in manufacturing cost.

(4) The exhaust VVT communicating hole and the exhaust camshaft lubricating oil channel are arranged in a penetrating way, and the exhaust VVT communicating hole has the characteristics of simple structure and convenience for processing. In addition, the exhaust VVT control valve is provided in the exhaust VVT communication hole, the control oil passage is short, and the response of the exhaust VVT is facilitated.

(5) The throttle valve is arranged, so that the flow of the lubricating oil channel to the exhaust camshaft can be adjusted, the oil pressure and flow requirements of the oil for the exhaust VVT phaser and the lubricating requirements of the exhaust camshaft can be met.

(6) The transverse oil passage is connected with the intake VVT oil passage, so that the main oil passage is directly connected with the intake VVT oil passage, the control oil passage can be shortened, and the response of the intake VVT is facilitated.

Drawings

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

fig. 1 is a schematic structural diagram of an oil circuit structure of an engine cylinder head system according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a bottom of a cylinder cover according to an embodiment of the present invention;

fig. 3 is a schematic diagram of an oil circuit of an engine cylinder head system according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of an assembly of an intake camshaft and an exhaust camshaft with a bearing cap according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of an intake camshaft lubrication oil passage and an exhaust camshaft lubrication oil passage according to an embodiment of the present invention;

description of reference numerals:

1. a cylinder cover; 2. an intake camshaft; 3. a bearing cap; 4. oil blocking; 5. an intake VVT phaser; 6. an exhaust VVT phaser; 7. an exhaust camshaft;

101. a main oil gallery; 102. a transverse oil passage; 103. an exhaust side main oil gallery; 104. an intake side oil passage; 105. mounting holes; 201. an oil inlet hole; 202. a lubricating oil passage of the air inlet camshaft; 203. an oil outlet of the air inlet camshaft; 204. a steel ball; 205. an intake VVT oil passage; 301. a second communicating oil passage; 701. an annular oil groove; 702. a first connecting oil hole; 703. an exhaust VVT communication hole; 704. a throttle valve; 705. an exhaust camshaft lubricating oil passage; 706. an oil outlet of the exhaust camshaft;

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that, if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the appearances of the terms first, second, etc. in this specification are not necessarily all referring to the same item, but are to be construed as indicating or implying any particular importance.

In addition, in the description of the present invention, the terms "mounted," "connected," and "connecting" are to be construed broadly unless otherwise specifically limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. To those of ordinary skill in the art, the specific meaning of the above terms in the present invention can be understood in combination with the specific situation.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

The embodiment relates to an oil circuit structure of an engine cylinder cover system, which can provide oil for an air inlet camshaft lubricating oil passage, an air outlet camshaft lubricating oil passage and an air outlet VVT communicating oil circuit at the same time mainly through a main oil passage, a transverse oil passage and an air outlet side main oil passage which are arranged, so that the lubrication of the air inlet camshaft and the air outlet camshaft can be realized, and the response of the air outlet VVT is facilitated.

Based on the above design concept, an exemplary structure of the oil path structure of the engine cylinder head system of the present embodiment is shown in fig. 1 to 5, wherein fig. 1 shows an overall structural diagram of the oil path structure of the engine cylinder head system, and structurally, the arrangement of each specific oil path mainly relates to the following components, including the cylinder head 1, the intake camshaft 2 and the exhaust camshaft 7 mounted on the cylinder head 1, and the mounting seat for mounting the intake camshaft 2 and the exhaust camshaft 7, and the like.

Next, the oil passage structure of the engine head system according to the present embodiment will be described in detail.

As shown in fig. 1 in conjunction with fig. 2 to 5, the oil path structure of the cylinder head system of the engine mainly includes a main oil path 101 that is constructed in the cylinder head 1 and is communicable with an external oil path, a lateral oil path 102 that is communicated with the main oil path 101, and an exhaust side oil path that is communicated with one end of the lateral oil path 102. The exhaust side oil path comprises an exhaust side main oil path 103 connected with the transverse oil path 102 and a first communication oil path connected with the exhaust side main oil path 103, the first communication oil path is connected with an exhaust camshaft lubricating oil path 705 and an exhaust VVT communication oil path, and the first communication oil path is connected with an intake camshaft lubricating oil path 202 through a second communication oil path 301.

Specifically, as shown in fig. 1, mounting seats for mounting the intake camshaft 2 and the exhaust camshaft 7 are respectively provided at both ends of the cylinder head 1, wherein the mounting seats include bearing seats for receiving the intake camshaft 2 and the exhaust camshaft 7, and bearing caps 3 fixedly attached to the cylinder head 1 in correspondence with the bearing seats. Further, an intake VVT phaser 5 and an exhaust VVT phaser 6 are provided on the intake camshaft 2 and the exhaust camshaft 7, respectively. In addition, in order to facilitate the machining of the transverse oil passage 102, a machining hole is formed in the cylinder head 1, and after the transverse oil passage 102 is machined, an oil plug is arranged in the machining hole, so that the transverse oil passage 102 is located in the cylinder head 1.

In this embodiment, an annular oil groove 701 communicating with the exhaust side main oil gallery 103 is provided between the mount pad at one end and the exhaust camshaft 7, and a first connecting oil hole 702 communicating with the lubricating oil passage 705 of the exhaust camshaft is provided at the bottom of the annular oil groove 701, and the annular oil groove 701 and the first connecting oil hole 702 constitute the aforementioned first communicating oil passage. The first communicating oil passage is formed by an annular oil groove 701 and a first connecting oil hole 702, and has a simple structure, and the structure of the oil passage is more compact.

It should be noted that the mount is located close to the end where the intake VVT phaser 5 and the exhaust VVT phaser 6 are located, and the annular oil groove 701 may be provided on the inner circumferential surface of the mount or on the outer circumferential surface of the exhaust camshaft 7.

As one of the preferred embodiments, as shown in fig. 3 to 5, the annular oil groove 701 of the present embodiment is configured on the outer circumferential surface of the exhaust camshaft 7, and has features of being easy to machine and form and low in manufacturing cost, compared to the annular oil groove provided on the inner circumferential surface of the mount. Further, the first connecting oil holes 702 are specifically a plurality of annular oil grooves 701 arranged at intervals in the circumferential direction.

In addition, as shown in fig. 4, an exhaust camshaft oil outlet 706 communicating with an exhaust camshaft lubricant oil passage 705 is opened in the journal of the exhaust camshaft 7. And an air inlet camshaft oil outlet 203 communicated with the air inlet camshaft lubricating oil channel 202 is arranged on the journal of the air inlet camshaft 2. In this way, oil can correspondingly flow out of the inlet camshaft oil outlet 203 and the exhaust camshaft oil outlet 706 through the inlet camshaft oil passage 202 and the exhaust camshaft oil passage 705, so that lubrication of the journal is realized.

The exhaust VVT communication oil passage specifically includes an exhaust VVT communication hole 703 formed at one end of the exhaust camshaft 7, the exhaust VVT communication hole 703 is communicated with an exhaust camshaft lubrication oil passage 705, and the first connection oil hole 702 is connected to the exhaust VVT communication hole 703, that is, the exhaust VVT communication hole 703 is connected to the exhaust camshaft lubrication oil passage 705.

And, the arrangement is such that the oil flows toward both ends of the exhaust camshaft 7 through the first connecting oil hole 702, respectively, as shown by the arrow direction in fig. 4, the oil flows toward the exhaust camshaft lubricating oil passage 705 all the way through the first connecting oil hole 702 for lubricating the journal of the exhaust camshaft 7, and the other way flows toward the exhaust VVT communication hole 703 as an oil inlet of the exhaust VVT phaser 6 for supplying the exhaust VVT phaser 6 with oil.

Meanwhile, an exhaust VVT control valve, not shown, is provided in the exhaust VVT communication hole 703, and further, a throttle valve 704 is provided in the exhaust camshaft lubricant passage 705 near the exhaust VVT communication hole 703. The exhaust VVT control valve may refer to an existing structure, and a detailed structure thereof is not described. In addition, the exhaust VVT control valve is provided in the exhaust VVT communication hole 703, and the control oil path can be made short, which is advantageous for the response of the exhaust VVT. Further, a throttle valve 704 is provided to adjust the flow rate to the exhaust camshaft lubricating oil passage 705, and to be able to satisfy the oil pressure and flow rate demand of the oil for the exhaust VVT phaser 6, and the lubrication demand of the exhaust camshaft 7.

It should be noted that, in addition to the above-described structure in which the exhaust VVT communication hole 703 and the exhaust camshaft lubricating oil passage 705 are connected, a structure in which they are not connected separately may be adopted, and specifically, for example, in the structure shown in fig. 3, the transverse oil passage 102 is extended to the left by a certain length, and another oil passage connected to the transverse oil passage 102 is provided in the cylinder head 1, and the oil passage is connected to the exhaust side main oil passage 103 in parallel with the transverse oil passage 102. In addition, an oil outlet is formed in a bearing seat on the cylinder head 1, the oil outlet is communicated with an oil passage and is staggered with the first connecting oil hole 702, and meanwhile, a steel ball is arranged between the first connecting oil hole 702 and the oil outlet, so that the inlet camshaft lubricating oil passage 202 and the exhaust VVT communication hole 703 are separately and non-communicated oil passage structures, and thus, lubrication on the exhaust camshaft 7 and oil supply on the exhaust VVT phaser 6 can be realized.

In this embodiment, the second communication oil passage 301 is specifically configured on the bearing cover 3, and one end of the second communication oil passage 301 is communicated with the annular oil groove 701, and the other end is connected with the intake camshaft lubricating oil passage 202 through the oil inlet hole 201 configured on the intake camshaft 2. In this way, oil can be made to flow into the second communication oil passage 301 through the annular oil groove 701, and flow into the intake camshaft lubricating oil passage 202 formed inside the intake camshaft 2 through the oil inlet hole 201, and be lubricated by the intake camshaft oil outlet hole 203, so as to lubricate the journal of the intake camshaft 2.

In addition, in the present embodiment, the other end of the lateral oil passage 102 is connected to the intake VVT oil passage 205, with respect to the end connected to the exhaust-side oil passage. Specifically, the transverse oil passage 102 is connected to an intake VVT oil passage 205 through an intake side oil passage 104 formed in the cylinder head 1, and an intake VVT control valve is provided in the intake side oil passage 104. As shown in fig. 3, a mounting hole 105 for mounting an intake VVT control valve is formed in one side of the cylinder head 1, and the mounting hole 105 communicates with the intake side oil passage 104 and is connected to an intake VVT oil passage 205 so that the intake VVT phaser 5 can be supplied with oil.

The above-mentioned intake VVT control valve may refer to the existing structure, and is not described herein again, and in addition, the intake VVT oil passage 205 and the above-mentioned intake camshaft lubrication oil passage 202 are separated into two independent and non-communicated oil passages by the steel ball 204. Further, by providing the lateral oil passage 102 in connection with the intake VVT oil passage 205, the main oil passage 101 can be directly connected to the intake VVT oil passage 205, and the control oil passage can be shortened and the response of the intake VVT can be facilitated.

In the oil path structure of the engine cylinder head system according to the embodiment, when the structure is applied specifically, oil flows into the transverse oil path 102 through the main oil path 101, and is divided into two paths along the transverse oil path 102, one path of the oil flows into the exhaust side main oil path 103, and the other path of the oil flows into the intake side oil path 104 and flows into the intake VVT oil path 205, so that the response of the intake VVT is realized. One path flowing into the exhaust side main oil gallery 103 is divided into three branches via the annular oil groove 701 and the first connecting oil hole 702, and is used for lubricating the intake camshaft 2 and the exhaust camshaft 7 and realizing the response of the exhaust VVT, respectively.

The engine cylinder head system oil circuit structure of this embodiment, through main oil gallery 101 and horizontal oil gallery 102 and the exhaust side oil circuit that sets up, can be simultaneously to exhaust camshaft lubrication oil duct 705, exhaust VVT intercommunication oil circuit, and intake camshaft lubrication oil duct 202 provides fluid, and do benefit to intake camshaft 2, exhaust camshaft 7's lubrication and exhaust VVT phaser 6's response, and this engine cylinder head system oil circuit structure has compact structure, simple characteristics, and simultaneously, make cylinder head 1 less than the change in original structure, thereby can be favorable to reducing the development cost of cylinder head 1, and better result of use has.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an engine cylinder head system oil circuit structure which characterized in that includes: the oil cylinder comprises a main oil channel (101) constructed in a cylinder head (1), a transverse oil channel (102) communicated with the main oil channel (101), and an exhaust side oil channel communicated with one end of the transverse oil channel (102), wherein:

the exhaust side oil way comprises an exhaust side main oil way (103) connected with the transverse oil way (102) and a first communicating oil way connected with the exhaust side main oil way (103), the first communicating oil way is connected with an exhaust camshaft lubricating oil passage (705) and an exhaust VVT communicating oil way, and the first communicating oil way is connected with an intake camshaft lubricating oil passage (202) through a second communicating oil way (301).

2. The engine cylinder head system oil circuit structure according to claim 1, characterized in that: the both ends of cylinder cap (1) are provided with the mount pad with installation intake camshaft (2) and exhaust camshaft (7) respectively, in one end the mount pad with be equipped with between exhaust camshaft (7) with annular oil groove (701) of exhaust side main oil gallery (103) intercommunication, and in the bottom of annular oil groove (701) be equipped with first connecting oil hole (702) that exhaust camshaft lubrication oil duct (705) link to each other, just annular oil groove (701) with first connecting oil hole (702) constitute first intercommunication oil duct.

3. The engine cylinder head system oil circuit structure according to claim 2, characterized in that: the annular oil groove (701) is formed on the outer peripheral surface of the exhaust camshaft (7).

4. The engine head system oil passage structure according to claim 3, characterized in that: the first connecting oil holes (702) are arranged in a plurality at intervals in the circumferential direction around the annular oil groove (701).

5. The engine cylinder head system oil circuit structure according to claim 2, characterized in that: an exhaust camshaft oil outlet (706) communicated with the exhaust camshaft lubricating oil channel (705) is formed in the journal of the exhaust camshaft (7).

6. The engine cylinder head system oil circuit structure according to claim 2, characterized in that: the exhaust VVT communicating oil way comprises an exhaust VVT communicating hole (703) which is formed at one end of the exhaust camshaft (7), the exhaust VVT communicating hole (703) is communicated with the exhaust camshaft lubricating oil channel (705), the first connecting oil hole (702) is connected with the exhaust VVT communicating hole (703), and an exhaust VVT control valve is arranged in the exhaust VVT communicating hole (703).

7. The engine cylinder head system oil circuit structure of claim 6, characterized in that: a throttle valve (704) is provided in the exhaust camshaft lubricant passage (705) near the exhaust VVT communication hole (703).

8. The engine cylinder head system oil circuit structure according to claim 2, characterized in that: the mounting seat has with the bearing frame of holding intake camshaft (2) with exhaust camshaft (7), and correspond bearing cap (3) that the bearing frame set up, second intercommunication oil duct (301) construct in on bearing cap (3), just the one end of second intercommunication oil duct (301) with annular oil groove (701) intercommunication, the other end through construct in inlet port (201) on intake camshaft (2) with intake camshaft lubricated oil duct (202) link to each other.

9. The engine head system oil passage structure according to any one of claims 1 to 8, characterized in that: the other end of the lateral oil passage (102) is connected to an intake VVT oil passage (205) with respect to the end connected to the exhaust side oil passage.

10. The engine cylinder head system oil circuit structure according to claim 9, characterized in that: the transverse oil passage (102) is connected with the intake VVT oil passage (205) through an intake side oil passage (104) formed in the cylinder head (1), and an intake VVT control valve is arranged in the intake side oil passage (104).