Lubricating oil way structure of engine

Abstract

The utility model provides a lubricating oil way structure of an engine, and belongs to the technical field of engines. The technical problem that an existing engine lubricating oil way is high in engine oil temperature is solved. According to the lubricating oil way structure of the engine, the engine comprises an oil pan and a vertically-arranged timing chain cover, the bottom face of the timing chain cover is fixedly connected with the upper edge face of the side wall of the oil pan in an attached mode, and a shaft hole penetrating through the two sides is formed in the timing chain cover. The lubricating oil way structure comprises an oil pumping chamber which is located on the inner side face of the timing chain cover and arranged around the periphery of the shaft hole, the bottom face of the timing chain cover is provided with an oil outlet hole channel which faces upwards and is communicated with the oil pumping chamber, and the upper edge face of the side wall of the oil pan is provided with an oil inlet and an oil outlet which are horizontally spaced. The oil inlet is communicated with the oil outlet through a cooling flow channel in the side wall of the oil pan, and a lower port of the oil outlet hole channel is communicated with the oil inlet in a butt joint mode. The engine oil temperature can be further reduced, and the lubricating effect is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of engines and relates to a lubricating oil circuit structure of an engine. Background Art

[0002] When the engine is running, each moving part must be lubricated by oil. Oil delivery to all parts of the engine requires the cooperation of an oil pump and lubrication lines. The engine's front cover is a key component of the engine housing, protecting the engine's timing chain.

[0003] To improve structural compactness, the applicant previously developed a timing chain cover with authorization publication number CN202545050U. This cover integrates a water pump and an oil pump, with the oil pump chamber located inside the cover. The oil pump is integrated into the engine's front cover, and the engine's rotating shaft drives the oil pump installed in the pump chamber to pressurize the oil.

[0004] The above structure still has some shortcomings. The oil in the oil pump chamber is pressurized and directly sent into the engine cylinder. When the engine runs for a long time, the temperature of the oil is often high, which will reduce the lubrication effect. Summary of the Invention

[0005] The utility model aims at solving the above problems existing in the prior art and provides a lubricating oil circuit structure of an engine. The technical problem to be solved by the utility model is that the oil temperature in the lubricating oil circuit of the prior engine is high.

[0006] The purpose of this utility model can be achieved through the following technical solutions:

[0007] A lubricating oil circuit structure for an engine, the engine including an oil pan and a vertically arranged timing chain cover, the bottom surface of the timing chain cover being fitted and fixedly connected to the upper edge surface of the oil pan side wall, the timing chain cover having an axial hole passing through both sides, and characterized in that the lubricating oil circuit structure includes an oil pump chamber located on the inner side surface of the timing chain cover and arranged around the periphery of the axial hole, the bottom surface of the timing chain cover having an oil outlet channel upwardly connected to the oil pump chamber, the upper edge surface of the oil pan side wall having horizontally spaced oil inlet and oil outlet, the oil inlet being connected to the oil outlet via a cooling flow channel in the oil pan side wall, and the lower end port of the oil outlet channel being connected to the oil inlet.

[0008] The timing chain cover is an important component of the engine housing. The timing chain cover is arranged on the side of the engine and connected to the top of the oil pan. The shaft hole on the timing chain cover is for the rotating shaft to pass through. The oil pan is located at the bottom of the engine, and its inner cavity is used to collect the lubricating oil in the engine and send it to the oil pump. An oil pump chamber is provided on the side of the timing chain cover, which is conducive to the existing oil pump pumping the oil into the oil pump chamber, and then an oil outlet channel is provided on the bottom surface of the timing chain cover to connect upward to the oil pump chamber. In this way, the oil enters the cooling flow channel of the side wall of the oil pan below directly from the oil inlet through the oil outlet channel, which is conducive to sending the pressurized oil from the oil outlet into the main oil channel of the upper engine cylinder block through the oil pan with a lower temperature. While reducing the pipeline layout on the outside of the engine, it is also conducive to the arrangement so that the pressurized oil can pass through the oil pan with a lower temperature again for cooling, thereby ensuring the lubrication effect.

[0009] In the aforementioned engine lubricating oil circuit structure, the oil outlet passage is straight and tilts upward toward the shaft hole. The oil pumped out by the oil pump flows outward from the shaft hole. This aligns the orientation of the oil outlet passage with the oil flow, reducing energy loss as the oil flows into the passage. Furthermore, the passage can be formed simply by drilling, resulting in lower processing costs.

[0010] In the aforementioned engine lubricating oil circuit structure, the bottom surface of the timing chain cover has an annular groove arranged around the lower end of the oil outlet channel. This allows the bottom surface of the timing chain cover to be joined to the upper end surface of the oil pan by placing a seal within the annular groove to seal the joined surfaces, thereby ensuring a sealed oil circuit.

[0011] In the aforementioned engine lubricating oil circuit structure, the oil inlet has an elliptical cross-section. This allows the inlet's inner wall area to be larger while maintaining the same cross-sectional area, allowing the incoming oil to more fully exchange heat with the oil pan, resulting in more complete oil cooling and ensuring effective lubrication.

[0012] In the above-mentioned lubricating oil circuit structure of the engine, the timing chain cover is a cast aluminum part.

[0013] Compared with the prior art, the advantages of the present invention are as follows:

[0014] The lubricating oil circuit structure of the engine reduces the number of pipelines arranged on the outside of the engine and facilitates the arrangement so that the pressurized oil can be cooled again through the oil pan with a lower temperature, thereby ensuring the lubrication effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 2 is a front view structural diagram of this embodiment.

[0016] Figure 2 2 is a schematic diagram of the rear structural view of the timing chain cover in this embodiment.

[0017] Figure 3 2 is a schematic diagram of the bottom structure of the timing chain cover in this embodiment.

[0018] Figure 4 yes Figure 3 A partial view of the AA section view in .

[0019] Figure 5 2 is a schematic diagram of the top structure of the oil pan in this embodiment.

[0020] Figure 6 2 is a schematic diagram of the bottom structure of this embodiment.

[0021] Figure 7 yes Figure 6 Schematic diagram of the BB cross-section structure.

[0022] In the figure, 1, timing chain cover; 11, shaft hole; 12, pump oil chamber; 13, oil outlet channel; 14, ring groove;

[0023] 2. Oil pan; 21. Oil inlet; 22. Oil outlet; 23. Cooling channel. DETAILED DESCRIPTION

[0024] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0025] like Figure 1-7 As shown, the lubricating oil circuit structure of the present engine includes a timing chain cover 1, which is a cast aluminum part having a shaft hole 11 extending from front to back. The lubricating oil circuit structure includes an oil pump chamber 12 located on the side of the timing chain cover 1 and arranged around the periphery of the shaft hole 11. The bottom surface of the timing chain cover 1 has an oil outlet channel 13 that is upwardly connected to the oil pump chamber 12. Preferably, the oil outlet channel 13 is in the shape of a straight hole and is tilted from bottom to top toward the side where the shaft hole 11 is located. The bottom surface of the timing chain cover 1 has an annular groove 14 arranged around the end of the oil outlet channel 13.

[0026] like Figure 1 、 Figure 5-7 As shown, the engine also includes an oil pan 2, which is a casting. The upper end surface of the oil pan 2 has an oil inlet 21 in the area where it interfaces with the timing chain cover 1, and an oil outlet 22 in the area where it interfaces with the cylinder block. The oil inlet 21 communicates with the oil outlet 22 via a cooling channel 23 in the side wall of the oil pan 2. The bottom surface of the timing chain cover 1 is joined to the upper edge of the side wall of the oil pan 2, and the oil outlet channel 13 is connected to the oil inlet 21. The specific connection method is conventional. The cross-section of the oil inlet 21 is elliptical.

[0027] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. A lubricating oil circuit structure of an engine, the engine comprising an oil pan (2) and a vertically arranged timing chain cover (1), the bottom surface of the timing chain cover (1) being fixedly connected to the upper edge of the side wall of the oil pan (2), the timing chain cover (1) having an axial hole (11) passing through both sides, characterized in that: The lubricating oil circuit structure comprises an oil pump chamber (12) located on the side of the timing chain cover (1) and arranged around the periphery of the shaft hole (11); the bottom surface of the timing chain cover (1) has an oil outlet channel (13) upwardly connected to the oil pump chamber (12); the upper edge surface of the side wall of the oil pan (2) has an oil inlet (21) and an oil outlet (22) spaced horizontally apart; the oil inlet (21) is connected to the oil outlet (22) via a cooling flow channel (23) in the side wall of the oil pan; and the lower end of the oil outlet channel (13) is connected to the oil inlet (21).

2. The lubricating oil circuit structure of the engine according to claim 1, characterized in that: The oil outlet channel (13) is in the shape of a straight hole and is inclined from bottom to top toward the side where the shaft hole (11) is located.

3. The lubricating oil circuit structure of the engine according to claim 1 or 2, characterized in that: The bottom surface of the timing chain cover (1) has an annular groove (14) arranged around the lower end of the oil outlet channel (13).

4. The lubricating oil circuit structure of the engine according to claim 1 or 2, characterized in that: The cross section of the oil inlet (21) is elliptical.

5. The lubricating oil circuit structure of the engine according to claim 1 or 2, characterized in that: The timing chain cover (1) is a cast aluminum part.

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