Cylinder head oil way structure

Abstract

The utility model relates to a cylinder head oil way structure which is arranged on a cylinder head of an engine and communicated with an oil control valve mechanism. The cylinder head comprises a cam shaft seat pivoted with a cam shaft, an air inlet rocker arm group, a high-speed rocker arm spring group, a high-speed rocker arm spring seat body, an air inlet valve spring group and an air inlet valve spring seat body. The cam shaft is contained in a cam shaft chamber, the air inlet rocker arm set comprises a first rocker arm, a second rocker arm and a connecting mechanism, and the connecting mechanism is controlled by an oil way of the oil control valve mechanism and used for connecting or separating the first rocker arm and the second rocker arm. Wherein the oil control valve mechanism is communicated with a groove part of the air inlet valve spring seat body through a pressure relief oil duct, the cam shaft seat is provided with a communication oil duct, and the groove part is communicated with the cam shaft chamber through the communication oil duct. Therefore, the utility model solves the problems that the local temperature of the cylinder head is too high to influence the performance of an engine, the replacement of lubricating oil is too much and the like, and is an optimal design.

Description

Technical Field

[0001] The utility model relates to a cylinder head oil circuit structure, in particular to a cylinder head oil circuit structure suitable for fuel motorcycles. Background Art

[0002] In the prior art, an engine with a variable valve lift controls the oil circuit of a connecting mechanism through an oil control valve mechanism to connect or separate a first rocker arm and a second rocker arm to switch the power characteristics of the engine. When the oil control valve mechanism is in the process of releasing pressure, the lubricating oil released by the oil control valve mechanism must flow back to the camshaft chamber or the chain chamber through the intake valve spring assembly, the groove portion of the intake valve spring seat body, the intake valve spring seat body, the high-speed rocker arm spring seat body and the camshaft chamber.

[0003] However, this method causes the lubricating oil released from the oil control valve mechanism to stagnate due to the obstruction of the intake valve spring assembly, the groove of the intake valve spring seat body, the high-speed rocker arm spring seat body and the intake valve spring seat body. The lubricating oil released from the oil control valve mechanism is unable to flow back to the camshaft chamber or the chain chamber, causing the local temperature of the cylinder head to be too high, thus affecting the engine performance and causing problems such as excessive residual lubricating oil after replacement.

[0004] The inventor, in the spirit of active invention, has been eager to think of a cylinder head oil circuit structure that can solve the above-mentioned problems. After several studies and experiments, the present utility model is finally completed. Summary of the invention

[0005] The main purpose of the utility model is to provide a cylinder head oil circuit structure, and through the arrangement of the cylinder head oil circuit structure, solve the problems that during the pressure relief process of the oil control valve mechanism, the lubricating oil is blocked by the groove part of the intake valve spring seat body, the high-speed rocker arm spring seat body, the intake valve spring and the intake valve spring seat body, and partially stagnates and cannot flow back to the camshaft chamber or the chain chamber, resulting in excessively high local temperature of the cylinder head and thus affecting the engine performance and excessive lubricating oil replacement residue. It is actually an optimized design.

[0006] To achieve the above-mentioned purpose, the cylinder head oil circuit structure of the utility model is arranged in a cylinder head of an engine and connected to an oil control valve mechanism, and the oil control valve mechanism is arranged on the side wall of the cylinder head. The cylinder head includes a camshaft seat pivotally provided with a camshaft, an intake rocker arm group, a high-speed rocker arm spring group, a high-speed rocker arm spring seat body, an intake valve spring group and an intake valve spring seat body. The camshaft is accommodated in a camshaft chamber, and the intake rocker arm group includes a first rocker arm, a second rocker arm and a connecting mechanism. The first rocker arm drives the high-speed rocker arm spring group to actuate, and the second rocker arm drives the intake valve spring group to actuate. The connecting mechanism is controlled by the oil circuit of the oil control valve mechanism and is used to connect or separate the first rocker arm and the second rocker arm.

[0007] The oil control valve mechanism is connected to a groove portion of the intake valve spring seat body via a pressure relief oil passage, the camshaft seat is provided with a connecting oil passage, and the groove portion is connected to the camshaft chamber via the connecting oil passage.

[0008] The camshaft may be provided with a main oil passage, and the connecting oil passage may be connected to the camshaft chamber via the main oil passage.

[0009] The above-mentioned connecting oil passage may include a first oil outlet and a second oil outlet, and the camshaft may be provided with a main oil passage connected with the first oil outlet, and the second oil outlet and the main oil passage are respectively connected to the camshaft chamber.

[0010] The camshaft may further be provided with a first auxiliary oil passage and a second auxiliary oil passage, and the main oil passage is connected to the camshaft chamber via the first auxiliary oil passage and the second auxiliary oil passage respectively.

[0011] The cylinder head may further include a chain chamber, and the camshaft chamber is connected to the chain chamber.

[0012] The cylinder head may further include a decompression mechanism, which is disposed on the camshaft.

[0013] The cylinder head may further include a decompression mechanism, which is disposed on the camshaft, and the main oil passage is connected to the decompression mechanism.

[0014] The above summary and the following detailed description are exemplary in nature and are intended to further illustrate the scope of the patent application of the present utility model. Other purposes and advantages of the present utility model will be described in the subsequent specific implementation methods and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of an engine according to a preferred embodiment of the utility model.

[0016] Figure 2 This is a partial exploded view of a cylinder head according to a preferred embodiment of the present invention.

[0017] Figure 3 The cylinder head oil circuit structure of the first embodiment of the utility model Figure 1 Z direction view.

[0018] Figure 4 The cylinder head oil circuit structure of the first embodiment of the utility model Figure 3 AA section view.

[0019] Figure 5 The cylinder head oil circuit structure of the first embodiment of the utility model Figure 1 Partial cross-sectional view in the Z direction.

[0020] Figure 6 The cylinder head oil circuit structure of the second embodiment of the utility model Figure 1 Partial cross-sectional view in the Z direction.

[0021] Figure 7 The cylinder head oil circuit structure of the third embodiment of the utility model Figure 1 Partial cross-sectional view in the Z direction.

[0022] Figure 8 The cylinder head oil circuit structure of the fourth embodiment of the utility model Figure 1 Partial cross-sectional view in the Z direction.

[0023] Fig. 9 The cylinder head oil circuit structure of the fourth embodiment of the utility model Figure 8 BB cross-sectional view.

[0024] Description of main component symbols:

[0025] 1 Engine

[0026] 2 Cylinder head

[0027] 20 Rocker shaft

[0028] 21 Camshaft

[0029] 22 Camshaft seat

[0030] 23 Intake rocker arm assembly

[0031] 231 First rocker arm

[0032] 232 Second rocker arm

[0033] 233 Linking mechanism

[0034] 24 High speed rocker arm spring seat

[0035] 240 high speed rocker spring set

[0036] 25 Intake valve spring seat

[0037] 250 Intake valve spring set

[0038] 251 Groove

[0039] 26 Pressure relief mechanism

[0040] 3 Oil control valve mechanism

[0041] H1 First oil outlet

[0042] H2 Second oil outlet

[0043] P1 Pressure relief oil passage

[0044] P2 P2' P2” connecting oil passage

[0045] P3, P3' main oil channel

[0046] P4 1st auxiliary oil channel

[0047] P5 Second auxiliary oil channel

[0048] R1 Camshaft housing

[0049] R2 Chain Room DETAILED DESCRIPTION

[0050] See also Figure 1 and Figure 2 , which are respectively a three-dimensional diagram of an engine and a partially exploded diagram of a cylinder head of a preferred embodiment of the utility model. The figure shows an engine 1 with a variable valve lift, and the cylinder head oil circuit structure of the utility model is arranged on a cylinder head 2 of the engine 1 and connected to an oil control valve mechanism 3. The oil control valve mechanism 3 is assembled on the side wall of the cylinder head 2 to smoothly return the lubricating oil released by the oil control valve mechanism 3 to a camshaft chamber R1 (such as Figure 3 As shown), or further refluxes to a chain chamber R2 (as shown Figure 3 ). The cylinder head 2 includes a camshaft seat 22 pivotally provided with a camshaft 21, an intake rocker arm assembly 23, a high-speed rocker arm spring seat body 24, a high-speed rocker arm spring assembly 240, an intake valve spring seat body 25 and an intake valve spring assembly 250. The camshaft 21 is accommodated in the camshaft chamber R1. The intake rocker arm assembly 23 is pivotally provided on the camshaft seat 22 with a rocker arm shaft 20, and includes a first rocker arm 231, a second rocker arm 232 and a connecting mechanism 233. The first rocker arm 231 drives the high-speed rocker arm spring assembly 240 to actuate, and the second rocker arm 232 drives the intake valve spring assembly 250 to actuate. The connecting mechanism 233 is controlled by the oil circuit of the oil control valve mechanism 3, and is used to connect or separate the first rocker arm 231 and the second rocker arm 232 to switch the power characteristics of the engine 1.

[0051] The cylinder head oil circuit structure of each embodiment of the present invention described later is an improved variation based on the aforementioned engine 1 and cylinder head 2 structure, which will be noted in advance.

[0052] See also Figures 3 to 5 , which are respectively the cylinder head oil circuit structure of the first embodiment of the utility model Figure 1 Z-direction view, Figure 3 AA section view and Figure 1A partial cross-sectional view in the Z direction. As shown in the figure, in this embodiment, the oil control valve mechanism 3 is connected to a groove portion 251 of the intake valve spring seat body 25 via a pressure relief oil passage P1, and the camshaft seat 22 is provided with a connecting oil passage P2, and the connecting oil passage P2 has a first oil outlet H1. The camshaft 21 is provided with a main oil passage P3, a first auxiliary oil passage P4 and a second auxiliary oil passage P5, the main oil passage P3 is connected to the first oil outlet H1, and the main oil passage P3 is connected to the camshaft chamber R1 via the first auxiliary oil passage P4 and the second auxiliary oil passage P5. In addition, the cylinder head 2 also includes a decompression mechanism 26, which is arranged on the camshaft 21, but the main oil passage P3 of this embodiment is not connected to the decompression mechanism 26.

[0053] Through the above-mentioned cylinder head oil circuit structure, the lubricating oil released from the oil control valve mechanism 3 flows back to the groove portion 251 through the pressure relief oil passage P1, and then the lubricating oil retained around the groove portion 251 flows back to the main oil passage P3 through the connecting oil passage P2, and the lubricating oil is returned to the first auxiliary oil passage P4 and the second auxiliary oil passage P5 through the rotational centrifugation of the camshaft 21, and finally splashes to the internal mechanism of the camshaft chamber R1, and further flows back to the chain chamber R2, completing the entire return path.

[0054] See also Figure 6 , which is the cylinder head oil circuit structure of the second embodiment of the utility model Figure 1 As shown in the figure, the basic structure of the cylinder head oil circuit structure of this embodiment is the same as that of the first embodiment, except that the main oil passage P3' of this embodiment is connected to the pressure reducing mechanism 26, so part of the lubricating oil in the main oil passage P3' can be returned to the pressure reducing mechanism 26 to lubricate the relevant parts of the pressure reducing mechanism 26.

[0055] See also Figure 7 , which is the cylinder head oil circuit structure of the third embodiment of the utility model Figure 1 A partial cross-sectional view in the Z direction. As shown in the figure, in this embodiment, the oil control valve mechanism 3 is connected to a groove portion 251 of the intake valve spring seat body 25 via a pressure relief oil passage P1, and the camshaft seat 22 is provided with a connecting oil passage P2', and the connecting oil passage P2' has a second oil outlet H2, and the second oil outlet H2 is connected to the camshaft chamber R1. In addition, the cylinder head 2 also includes a decompression mechanism 26, which is arranged on the camshaft 21, but the decompression mechanism 26 of this embodiment does not have lubricating oil flowing through it.

[0056] Through the above-mentioned cylinder head oil circuit structure, the lubricating oil released from the oil control valve mechanism 3 flows back to the groove portion 251 through the pressure relief oil passage P1, and then the lubricating oil retained around the groove portion 251 flows back to the camshaft chamber R1 through the connecting oil passage P2', splashes to the internal mechanism of the camshaft chamber R1 through the second oil outlet H2, and further flows back to the chain chamber R2, completing the entire return path.

[0057] See also Figure 8 and Fig. 9 , which are respectively the cylinder head oil circuit structure of the fourth embodiment of the utility model Figure 1 A partial cross-sectional view of the Z direction and Figure 8 BB sectional view. As shown in the figure, in this embodiment, the oil control valve mechanism 3 is connected to a groove portion 251 of the intake valve spring seat body 25 via a pressure relief oil passage P1, and the camshaft seat 22 is provided with a connecting oil passage P2", and the connecting oil passage P2" includes a first oil outlet H1 and a second oil outlet H2. The camshaft 21 is provided with a main oil passage P3', a first auxiliary oil passage P4 and a second auxiliary oil passage P5, the first oil outlet H1 is connected to the main oil passage P3', the main oil passage P3' is connected to the camshaft chamber R1 via the first auxiliary oil passage P4 and the second auxiliary oil passage P5, and the second oil outlet H2 is connected to the camshaft chamber R1. In addition, the cylinder head 2 also includes a decompression mechanism 26, which is arranged on the camshaft 21. The main oil passage P3' of this embodiment is connected to the decompression mechanism 26, so part of the lubricating oil in the main oil passage P3' can be returned to the decompression mechanism 26, and the relevant parts of the decompression mechanism 26 are lubricated.

[0058] Through the above-mentioned cylinder head oil circuit structure, the lubricating oil released from the oil control valve mechanism 3 flows back to the groove portion 251 through the pressure relief oil passage P1, and then the lubricating oil retained around the groove portion 251 flows back to the main oil passage P3' through the connecting oil passage P2", and the lubricating oil flows back to the first auxiliary oil passage P4 and the second auxiliary oil passage P5 through the rotation centrifugation of the camshaft 21, and finally splashes to the internal mechanism of the camshaft chamber R1, and further flows back to the chain chamber R2, and at the same time, part of the lubricating oil in the main oil passage P3' can flow back to the pressure reducing mechanism 26, and lubricate the related parts of the pressure reducing mechanism 26. On the other hand, the lubricating oil can also splash to the internal mechanism of the camshaft chamber R1 through the second oil outlet H2, and further flow back to the chain chamber R2, thereby completing the entire return path.

[0059] In summary, through the above four design methods, the utility model can solve the problems of the oil control valve mechanism being blocked by the groove part of the intake valve spring seat body, the high-speed rocker arm spring seat body, the intake valve spring assembly and the intake valve spring seat body during the pressure relief process, and part of the stagnant lubricating oil cannot flow back to the camshaft chamber or the chain chamber, causing the local temperature of the cylinder head to be too high, thereby affecting the engine performance and excessive lubricating oil replacement residue, etc. through the setting of the cylinder head oil circuit structure. It is actually an optimized design.

[0060] The above embodiments are merely examples for the convenience of explanation. The scope of rights claimed by the present utility model shall be based on the scope of protection required by the patent application documents, and is not limited to the above embodiments.

Claims

1. A cylinder head oil circuit structure, characterized in that: A cylinder head of an engine is provided and connected to an oil control valve mechanism, the oil control valve mechanism is arranged on the side wall of the cylinder head, the cylinder head includes a camshaft seat pivotally provided with a camshaft, an intake rocker arm assembly, a high-speed rocker arm spring seat body, a high-speed rocker arm spring assembly, an intake valve spring seat body and an intake valve spring assembly, the camshaft is accommodated in a camshaft chamber, the intake rocker arm assembly includes a first rocker arm, a second rocker arm and a connecting mechanism, the first rocker arm drives the high-speed rocker arm spring assembly to actuate, the second rocker arm drives the intake valve spring assembly to actuate, the connecting mechanism is controlled by the oil circuit of the oil control valve mechanism, and is used to connect or separate the first rocker arm and the second rocker arm; The oil control valve mechanism is connected to a groove portion of the intake valve spring seat body via a pressure relief oil passage, the camshaft seat is provided with a connecting oil passage, and the groove portion is connected to the camshaft chamber via the connecting oil passage.

2. The cylinder head oil circuit structure according to claim 1, characterized in that: The camshaft is provided with a main oil passage, and the communicating oil passage is communicated to the camshaft chamber via the main oil passage.

3. The cylinder head oil circuit structure according to claim 1, characterized in that: The communicating oil passage comprises a first oil outlet and a second oil outlet. The camshaft is provided with a main oil passage communicating with the first oil outlet. The second oil outlet and the main oil passage are respectively communicated with the camshaft chamber.

4. The cylinder head oil circuit structure according to claim 2 or claim 3, characterized in that: The camshaft is further provided with a first auxiliary oil passage and a second auxiliary oil passage, and the main oil passage is communicated with the camshaft chamber via the first auxiliary oil passage and the second auxiliary oil passage respectively.

5. The cylinder head oil circuit structure according to claim 1, characterized in that: The cylinder head further comprises a chain chamber, and the camshaft chamber is communicated with the chain chamber.

6. The cylinder head oil circuit structure according to claim 1, characterized in that: The cylinder head further comprises a decompression mechanism, and the decompression mechanism is arranged on the camshaft.

7. The cylinder head oil circuit structure according to claim 3, characterized in that: The cylinder head further comprises a decompression mechanism, which is arranged on the camshaft, and the main oil passage is connected to the decompression mechanism.

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