Engine cylinder head cover

Abstract

The present invention discloses an engine cylinder head cover, comprising: a cylinder head cover body, an air inlet and an air outlet. The cylinder head cover body has a hollow cavity. The air inlet is opened at one end of the cylinder head cover body, and one end of the air inlet is connected to the exhaust pipe of the engine. And the air outlet is opened at the other end of the cylinder head cover body, and one end of the air outlet is connected to the exhaust pipe of the engine. Among them, the other end of the air inlet is connected to the hollow cavity, and the other end of the air outlet is connected to the hollow cavity. Thereby, the engine cylinder head cover of the present invention has a simple and reasonable structure, and can make the engine exhaust flow through and heat the cylinder head cover, thereby ensuring the normal operation of the engine.

Description

Technical Field

[0001] The invention relates to the technical field of engines, in particular to an engine cylinder head cover. Background Art

[0002] The cylinder head cover of the engine is located at the top of the engine. Its main function is to prevent foreign matter from entering the engine and to seal it. Inside the cylinder head cover are engine rocker arms, valves, camshafts and other parts that are running at high speeds, which will generate a lot of oil particles and oil mist that will splash onto the cylinder head cover.

[0003] When the engine is burning, some gas will leak out of the combustion chamber and eventually be discharged outside the engine through the oil pan, cylinder head cover, and breather. At present, the new emission regulations require the crankcase ventilation to be connected to the engine intake to avoid the emission of pollutants. The exhaust gas produced by engine combustion contains a small amount of water vapor. If the fuel is natural gas, more water vapor will be produced. In cold weather, this water vapor will condense on the top of the cylinder head cover where the temperature is lower. The oil particles and oil mist produced by the engine contact and mix with these condensed water to form oil emulsions. The emulsified oil enters the oil-gas separator, supercharger and intercooler through the crankcase ventilation system. When there is a lot of emulsified oil, it is very easy to block the crankcase ventilation system, resulting in high crankcase pressure and oil leakage. At the same time, the oil emulsion will also contaminate the supercharger, intercooler, etc., affecting the normal operation of the engine.

[0004] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0005] The object of the present invention is to provide an engine cylinder head cover, which has a simple and reasonable structure and can allow the engine exhaust to flow through and heat the cylinder head cover, thereby ensuring the normal operation of the engine.

[0006] To achieve the above-mentioned purpose, the present invention provides an engine cylinder head cover, comprising: a cylinder head cover body, an air inlet and an air outlet. The cylinder head cover body has a hollow cavity. The air inlet is opened at one end of the cylinder head cover body, and one end of the air inlet is connected to the exhaust pipe of the engine. And the air outlet is opened at the other end of the cylinder head cover body, and one end of the air outlet is connected to the exhaust pipe of the engine. Among them, the other end of the air inlet is connected to the hollow cavity, and the other end of the air outlet is connected to the hollow cavity.

[0007] In one embodiment of the present invention, the engine cylinder head cover further includes an ambient temperature sensor electrically connected to the ECU, and the ambient temperature sensor is used to detect the ambient temperature in real time.

[0008] In one embodiment of the present invention, a first valve is disposed at the air inlet, and the first valve is electrically connected to the ECU.

[0009] In one embodiment of the present invention, a second valve is provided at the air outlet, and the second valve is electrically connected to the ECU.

[0010] In one embodiment of the present invention, when the ambient temperature is lower than a first preset value, the ECU controls the air inlet and the air outlet to open, so that hot air in the exhaust pipe of the engine passes through the hollow cavity, thereby heating the cylinder head cover body.

[0011] In one embodiment of the present invention, when the ambient temperature is higher than a second preset value, the ECU controls the air inlet and the air outlet to be closed.

[0012] Compared with the prior art, the engine cylinder head cover according to the present invention has a simple and reasonable structure, and can allow the engine exhaust to flow through and heat the cylinder head cover, thereby ensuring the normal operation of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram of a top view of an engine cylinder head cover according to an embodiment of the present invention;

[0014] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure at AA in the middle;

[0015] Figure 3 The figure is a schematic structural diagram of an engine cylinder head cover installed on an engine according to an embodiment of the present invention.

[0016] Description of main reference numerals:

[0017] 1-cylinder head cover body, 11-hollow cavity, 2-air inlet, 3-air outlet, 4-engine, 5-exhaust pipe. DETAILED DESCRIPTION

[0018] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation modes.

[0019] Unless explicitly stated otherwise, throughout the specification and claims, the term “comprise” or variations such as “include” or “comprising”, etc., will be understood to include the stated elements or components but not to exclude other elements or components.

[0020] Figure 1 1 is a schematic diagram of a top view of an engine cylinder head cover according to an embodiment of the present invention. Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure at AA in the middle. Figure 3 The figure is a schematic structural diagram of an engine cylinder head cover installed on an engine according to an embodiment of the present invention.

[0021] like Figures 1 to 3 As shown, an engine cylinder head cover according to a preferred embodiment of the present invention comprises: a cylinder head cover body 1, an air inlet 2 and an air outlet 3. The cylinder head cover body 1 has a hollow cavity 11. The air inlet 2 is opened at one end of the cylinder head cover body 1, and one end of the air inlet 2 is connected to the exhaust pipe 5 of the engine 4. And the air outlet 3 is opened at the other end of the cylinder head cover body 1, and one end of the air outlet 3 is connected to the exhaust pipe 5 of the engine 4. Among them, the other end of the air inlet 2 is connected to the hollow cavity 11, and the other end of the air outlet 3 is connected to the hollow cavity 11.

[0022] In one embodiment of the present invention, the engine cylinder head cover further comprises an ambient temperature sensor electrically connected to the ECU, and the ambient temperature sensor is used to detect the ambient temperature in real time. A first valve is disposed at the air inlet 2, and the first valve is electrically connected to the ECU.

[0023] In one embodiment of the present invention, a second valve is provided at the air outlet 3, and the second valve is electrically connected to the ECU. When the ambient temperature is lower than a first preset value, the ECU controls the air inlet 2 and the air outlet 3 to open, so that the hot air in the exhaust pipe 5 of the engine 4 passes through the hollow cavity 11, thereby heating the cylinder head cover body 1. When the ambient temperature is higher than a second preset value, the ECU controls the air inlet 2 and the air outlet 3 to close.

[0024] In practical applications, the cylinder head cover of the engine of the present invention avoids the hollow cavity 11 structure around and on the top of the cylinder head cover body 1 (i.e., it has a hollow cavity 11), and the cylinder head cover body 1 has an air inlet 2 and an air outlet 3, and the air inlet 2 and the air outlet 3 are connected to the hollow cavity 11. In order to make the air flow uniform, each part can be heated, and gas flow channels with different directions can be arranged in the cavity. When the engine 4 is running, the hot air of the exhaust pipe 5 of the engine 4 enters the hollow cavity 11 in the wall of the cylinder head cover from the air inlet 2 of the cylinder head cover body 1, and flows out from the air outlet 3 into the downstream exhaust pipe 5. In detail, the air inlet and outlet 3 are connected to the hollow cavity 11 at a suitable position (according to the direction of the engine intake and exhaust) (the size of the air inlet and outlet 3 is set according to the engine model, the actual temperature of the cylinder head cover, the exhaust flow margin, etc.), and the air inlet or outlet 3 can be provided with a valve, and the valve is determined by the data detected by the ambient temperature sensor and the ECU to determine whether to open or close. When the ambient temperature is low, the cylinder head cover intake valve is opened, and the hot air from the engine exhaust pipe 5 enters the cylinder head cover wall cavity from the cylinder head cover intake port 2, and flows out from the outlet port 3 into the downstream exhaust pipe 5. At this time, the cylinder head cover will be heated by the exhaust. The water vapor generated by the combustion of the engine 4 will not condense when it encounters the hot cylinder head cover, but directly enters the crankcase ventilation system, thus avoiding the water vapor from condensing water and emulsifying the engine oil on the inner wall of the cylinder head cover. When the ambient temperature is high, the valve is closed, and the engine exhaust does not pass through the cylinder head cover.

[0025] In summary, the engine cylinder head cover of the present invention has a simple and reasonable structure. The cylinder head cover body 1 has a hollow cavity 11 structure around and on the top wall, which allows the engine exhaust to flow through and heat the cylinder head cover. The air inlet 2 and the air outlet 3 of the cylinder head cover body 1 are provided with valves controlled by an ambient temperature sensor and an ECU to realize whether the cylinder head cover is heated or not, so that the engine exhaust can flow through and heat the cylinder head cover, thereby ensuring the normal operation of the engine.

[0026] The foregoing description of specific exemplary embodiments of the present invention is for the purpose of illustration and demonstration. These descriptions are not intended to limit the present invention to the precise form disclosed, and it is clear that many changes and variations can be made based on the above teachings. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various different exemplary embodiments of the present invention and various different selections and changes. The scope of the present invention is intended to be limited by the claims and their equivalents.

Claims

1. An engine cylinder head cover, characterized in that: include: A cylinder head cover body having a hollow cavity; An air inlet is provided at one end of the cylinder head cover body, and one end of the air inlet is connected to an exhaust pipe of the engine; as well as An air outlet is provided at the other end of the cylinder head cover body, and one end of the air outlet is connected to the exhaust pipe of the engine; Wherein, the other end of the air inlet is connected to the hollow cavity, and the other end of the air outlet is connected to the hollow cavity; Wherein, the engine cylinder head cover also includes an ambient temperature sensor, which is electrically connected to the ECU, and the ambient temperature sensor is used to detect the ambient temperature in real time; Wherein, the air inlet is provided with a first valve, and the first valve is electrically connected to the ECU; Wherein, the air outlet is provided with a second valve, and the second valve is electrically connected to the ECU; Wherein, when the ambient temperature is lower than a first preset value, the ECU controls the air inlet and the air outlet to open, so that the hot air in the exhaust pipe of the engine passes through the hollow cavity, thereby heating the cylinder head cover body; When the ambient temperature is higher than a second preset value, the ECU controls the air inlet and the air outlet to be closed.

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