Engine cylinder cover

Abstract

The utility model belongs to the technical field of internal combustion engines, and provides an engine cylinder cover which comprises a cover body, an air inlet channel, an air outlet channel, a valve guide pipe and a tappet hole are arranged on the cover body, and the air inlet channel and the air outlet channel are in smooth transition arc shapes at the position of the valve guide pipe so as to reduce resistance borne by air during air inlet and air outlet. The engine cylinder cover provided by the utility model is simple in structure and reasonable in design, so that the power of an engine is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of internal combustion engines, in particular to an engine cylinder cover. Background Art

[0002] The cylinder head is an important component of the engine, and is provided with an intake passage 110, an exhaust passage 120, a valve guide, and tappet holes 130 of the intake valve and the exhaust valve.

[0003] like Figure 1 As shown, in the cylinder head in the prior art, the intake passage 110 and the exhaust passage 120 are non-smoothly designed at the valve guide, which results in obstruction of intake and exhaust, thereby causing poor power. Utility Model Content

[0004] In view of the defects in the prior art, the purpose of the utility model is to provide an engine cylinder head to solve or alleviate the above-mentioned technical problems existing in the prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model provides an engine cylinder head, including a cover body, on which an intake duct, an exhaust duct, a valve guide and a tappet hole are arranged, and the intake duct and the exhaust duct are located at the valve guide in a smoothly transitional arc shape to reduce the resistance encountered by the gas during intake and exhaust.

[0006] Furthermore, a cooling air duct is provided between the outer wall of the valve tappet hole and the outer walls of the intake duct and the exhaust duct, and the cooling air duct extends from the intake duct toward the exhaust duct. The cover body is hollowed out through the cooling air duct so that the side wall thickness of the intake duct, the exhaust duct and the tappet hole is uniform, and the contact area between the cylinder head and the cooling air is increased.

[0007] Furthermore, a plurality of heat sinks are sequentially arranged between two opposite side walls of the cooling air duct to improve the heat dissipation effect.

[0008] Furthermore, the cooling air in the cooling air duct flows along the exhaust duct toward the air inlet duct.

[0009] Furthermore, the angle between the axis of the air inlet and the end wall of the cover is α, wherein 25°≤α≤30°.

[0010] Furthermore, an angle between an axis of the exhaust duct and an end wall of the cover body is β, wherein 15°≤β≤20°.

[0011] Beneficial effects of the utility model:

[0012] The engine cylinder head provided by the utility model has a simple structure and a reasonable design. By arranging the intake and exhaust passages at the valve guide to have a smooth transition arc, the gas can smoothly transition during intake and exhaust, thereby reducing the resistance encountered by the gas, so as to achieve the purpose of improving the intake efficiency and exhaust efficiency, and further achieve the purpose of improving the engine power. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0014] Figure 1 It is a structural view of an engine cylinder head in the prior art;

[0015] Figure 2 A three-dimensional view of an engine cylinder head provided by an embodiment of the utility model;

[0016] Figure 3 for Figure 2 A cross-sectional view in the AA direction is shown.

[0017] Reference numerals:

[0018] 100, cover body; 110, air inlet duct; 120, exhaust duct; 130, valve guide; 140, tappet hole; 150, cooling air duct; 160, heat sink. DETAILED DESCRIPTION

[0019] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0020] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which the utility model belongs.

[0021] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0022] In addition, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present utility model, the meaning of "plurality" is more than two, unless otherwise clearly and specifically limited.

[0023] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0024] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0025] like Figure 2-3As shown, the utility model provides an engine cylinder head, including a cover body 100, on which an intake passage 110, an exhaust passage 120, a valve guide 130 and a tappet hole 140 are arranged. The intake passage 110 and the exhaust passage 120 are arranged at the valve guide 130 in a smoothly transitioned arc shape to reduce the resistance of the gas during intake and exhaust, thereby achieving the purpose of improving the engine power. By arranging the intake passage 110 and the exhaust passage 120 at the valve guide 130 in a smoothly transitioned arc shape, the gas can smoothly transition during intake and exhaust, thereby reducing the resistance of the gas, thereby achieving the purpose of improving the intake efficiency and the exhaust efficiency, and further achieving the purpose of improving the engine power.

[0026] Preferably, the angle between the axis of the air inlet 110 and the end wall of the cover 100 is α, wherein 25°≤α≤30°. In this embodiment, 17°≤α≤17.5°. Preferably, α=17.2°.

[0027] Preferably, the angle between the axis of the exhaust channel 120 and the end wall of the cover body 100 is β, wherein 15°≤β≤20°. In this embodiment, 15.5°≤β≤16.5°. Preferably, β=16°.

[0028] In one embodiment, a cooling air duct 150 is provided between the outer wall of the valve lifter hole 140 and the outer wall of the intake duct 110 and the exhaust duct 120. The cooling air duct 150 extends from the intake duct 110 to the exhaust duct 120. The cover body 100 is hollowed out through the cooling air duct 150 to make the side wall thickness of the intake duct 110, the exhaust duct 120 and the lifter hole 140 uniform, and increase the contact area between the cylinder head and the cooling air, thereby achieving the purpose of improving the cooling effect on the cylinder head, and then achieving the purpose of increasing the engine power.

[0029] In one embodiment, a plurality of heat sinks 160 are sequentially arranged between two opposite side walls of the cooling air duct 150. By arranging the heat sink 160 in the cooling air duct 150, the contact area between the cover 100 and the cooling air is further increased, thereby achieving the purpose of further improving the heat dissipation effect.

[0030] In one embodiment, the cooling air in the cooling air duct 150 flows along the exhaust duct 120 toward the air inlet duct 110. Since the exhaust duct 120 discharges the gas after combustion, and the air inlet duct 110 enters the air, the temperature of the exhaust duct 120 is higher than that of the air inlet duct 110. The cooling air flows along the exhaust duct 120 toward the air inlet duct 110, so that when the temperature of the cooling air is low, the area of ​​the cover body 100 with a higher temperature is cooled, and when the temperature of the cooling air is high, the area of ​​the cover body 100 with a lower temperature is cooled, thereby achieving the purpose of improving the heat dissipation efficiency.

[0031] In the specification of the present utility model, a lot of specific details are described. However, it is understood that the embodiments of the present utility model can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this specification.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. An engine cylinder head, comprising a cover body (100), wherein the cover body (100) is provided with an intake passage (110), an exhaust passage (120), a valve guide (130) and a tappet hole (140), wherein: The intake passage (110) and the exhaust passage (120) are located at the valve guide (130) in a smoothly transitional arc shape, so as to reduce the resistance encountered by the gas during intake and exhaust.

2. The engine cylinder head according to claim 1, characterized in that: A cooling air duct (150) is provided between the outer wall of the push rod hole (140) and the outer walls of the intake duct (110) and the exhaust duct (120); the cooling air duct (150) extends from the intake duct (110) toward the exhaust duct (120); the cover body (100) is hollowed out through the cooling air duct (150) so that the side wall thicknesses of the intake duct (110), the exhaust duct (120) and the push rod hole (140) are uniform, thereby increasing the contact area between the cylinder head and the cooling air.

3. The engine cylinder head according to claim 2, characterized in that: A plurality of heat sinks (160) are sequentially arranged at intervals between two opposite side walls of the cooling air duct (150) to improve the heat dissipation effect.

4. The engine cylinder head according to claim 2 or 3, characterized in that: The cooling air in the cooling air duct (150) flows along the exhaust duct (120) toward the intake duct (110).

5. The engine cylinder head according to any one of claims 1 to 3, characterized in that: The angle between the axis of the air inlet (110) and the end wall of the cover body (100) is α, wherein 25°≤α≤30°.

6. The engine cylinder head according to claim 5, characterized in that: The angle between the axis of the exhaust passage (120) and the end wall of the cover body (100) is β, wherein 15°≤β≤20°.

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