A single cylinder head oil return structure

Abstract

The application provides a single cylinder head oil return structure, which comprises a frame, a first cylinder head and a second cylinder head which are symmetrically arranged on one side of the frame and are provided with fuel passages in the middle, a sealing unit arranged in the middle of the fuel passage and separating the fuel passage into an oil inlet passage and a horizontal passage, and a pipeline connecting the oil inlet passage to the horizontal passage; and a fifth passage is further arranged on the frame, the fifth passage is an injector mounting hole, and the fifth passage is communicated with the oil inlet passage to facilitate the entry of fuel. The single cylinder head oil return structure has the advantages of simple structure, few parts, good processability, safe and reliable sealing, and good economy.

Description

Technical Field

[0001] This invention belongs to the field of engine structure optimization, and in particular relates to a single cylinder head oil return structure. Background Technology

[0002] Currently, the fuel return to the cylinder head is mainly achieved through an external high-pressure fuel line. The high-pressure fuel line is connected to each return point via a spherical nozzle. With many connection points and parts, as the engine runs longer, the possibility of fuel leakage at the sealing points increases, which can easily cause a fire in the engine compartment. Summary of the Invention

[0003] In view of this, the present invention aims to propose a single cylinder head oil return structure to solve the problem that the fuel sealing points of the cylinder head are prone to leakage, which can cause fires in the engine compartment.

[0004] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0005] A single cylinder head oil return structure includes a frame and a No. 1 cylinder head and a No. 2 cylinder head sealed on one side. The No. 1 cylinder head and the No. 2 cylinder head are symmetrically arranged and have a fuel passage in the middle. A sealing unit in the middle of the fuel passage divides it into an inlet passage and a horizontal passage. The inlet passage is also connected to the horizontal passage. The frame also has a No. 5 passage, which is an injector mounting hole. The No. 5 passage is connected to the inlet passage to facilitate fuel entry.

[0006] Furthermore, the frame is sealed to the cylinder head and cylinder head 1 and cylinder head 2 by a third sealing ring.

[0007] Furthermore, the fifth channel is also equipped with a sealing port to seal the return fuel within the inlet channel.

[0008] Furthermore, a No. 1 sealing ring and a No. 2 sealing ring are also installed on the No. 5 channel, with the No. 1 sealing ring and the No. 2 sealing ring located on both sides of the oil inlet channel to form a sealing port.

[0009] Furthermore, the oil inlet channel connects to the horizontal channel after passing through channel 3, channel 1, channel 2, and channel 4 in sequence.

[0010] Furthermore, the No. 3 and No. 4 channels are both vertical channels set on the No. 1 and No. 2 cylinder heads, respectively. The No. 1 and No. 2 channels are set on the frame and intersect to form a conical channel.

[0011] Furthermore, the sealing unit consists of two steel balls, namely steel ball number one and steel ball number two, which are used to seal cylinder head number one and cylinder head number two, respectively.

[0012] Compared with the prior art, the single cylinder head oil return structure of the present invention has the following advantages:

[0013] (1) The single cylinder head oil return structure of the present invention has a simple structure, few parts, good processability, safe and reliable sealing, and good economy.

[0014] (2) The single cylinder head oil return structure described in this invention is not limited to fuel oil return, but is also applicable to lubricating oil return and coolant return structures, and has strong versatility. Attached Figure Description

[0015] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0016] Figure 1 This is a schematic diagram of a cross-sectional view of the single cylinder head oil return structure according to an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures:

[0018] 1-Seal Ring No. 1; 2-Fuel; 3-Seal Ring No. 2; 4-Channel No. 1; 5-Seal Ring No. 3; 6-Horizontal Channel; 7-Steel Ball No. 1; 8-Steel Ball No. 2; 9-Cylinder Head No. 1; 10-Frame; 11-Cylinder Head No. 2; 12-Channel No. 2; 13-Channel No. 3; 14-Channel No. 4; 15-Channel No. 5. Detailed Implementation

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0020] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] A single cylinder head oil return structure, such as Figure 1 As shown, the system includes a frame 10 and two cylinder heads 9 and 11 sealed on one side. The cylinder heads 9 and 11 are symmetrically arranged and have a fuel passage in the middle. A sealing unit in the middle of the fuel passage divides it into an inlet passage and a horizontal passage 6. The inlet passage is also connected to the horizontal passage 6. The frame 10 also has a fifth passage 15, which is an injector mounting hole. The fifth passage 15 is connected to the inlet passage to facilitate the entry of fuel 2.

[0024] Preferably, the frame 10 is sealed to the cylinder head 9 and the cylinder head 11 by the third sealing ring 5.

[0025] Preferably, the fifth channel 15 is also provided with a sealing port for sealing the return oil of fuel 2 within the oil inlet channel. Specifically, the fifth channel 15 is also equipped with a first sealing ring 1 and a second sealing ring 3, which are located on both sides of the oil inlet channel to seal the return oil of fuel 2.

[0026] In one or more embodiments, the oil inlet channel is connected to the horizontal channel 6 after passing through channel 3 13, channel 4 1, channel 2 16 and channel 4 14 in sequence.

[0027] Preferably, channel 13 and channel 14 are both vertical channels set on cylinder head 9 and cylinder head 11, and channel 4 and channel 16 are set on frame 10 and intersect to form a conical channel.

[0028] Preferably, the sealing unit consists of two steel balls, namely steel ball 7 and steel ball 8. Steel ball 7 and steel ball 8 are used to seal cylinder head 9 and cylinder head 11, respectively.

[0029] The working principle of a single cylinder head oil return structure is as follows:

[0030] Fuel 2 enters upwards through the inlet channel into channel 3 13, then into channel 4 in frame 10. From channel 4, fuel 2 passes through channel 2 16 and channel 4 14 into horizontal channel 6. The fuel return path for each cylinder is as described above. The fuel 2 inlet end flows back to the fuel tank through an external fuel line. This invention's structure is not limited to fuel return; it is also applicable to lubricating oil return and coolant return structures.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A single-unit cylinder head oil return structure, characterized in that: The system includes a frame and a No. 1 cylinder head and a No. 2 cylinder head that are sealed on one side. The No. 1 and No. 2 cylinder heads are symmetrically arranged and have a fuel passage in the middle. A sealing unit in the middle of the fuel passage divides it into an inlet passage and a horizontal passage. The inlet passage is also connected to the horizontal passage. The frame also has a No. 5 passage, which is an injector mounting hole. The No. 5 passage is connected to the inlet passage to facilitate fuel entry. The No. 5 channel is also equipped with a sealing port to seal the return fuel within the inlet channel; The No. 1 and No. 2 sealing rings are also installed on the No. 5 channel. The No. 1 and No. 2 sealing rings are located on both sides of the oil inlet channel to form a sealing port. The oil inlet channel passes through Channel 3, Channel 1, Channel 2 and Channel 4 in sequence before connecting with the horizontal channel; Channel 3 and Channel 4 are both vertical channels located on Cylinder Head 1 and Cylinder Head 2. Channel 1 and Channel 2 are set on the frame and intersect to form a conical channel.

2. The single-unit cylinder head oil return structure according to claim 1, characterized in that: The frame is sealed to cylinder head 1 and cylinder head 2 via sealing ring 3.

3. The single-unit cylinder head oil return structure according to claim 1, characterized in that: The sealing unit consists of two steel balls, namely steel ball number one and steel ball number two, which are used to seal cylinder head number one and cylinder head number two, respectively.

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