Four-valve cylinder cover for lightweight engine

A cylinder head and engine technology, which is applied to engine components, machines/engines, cylinder heads, etc., can solve the problems of affecting intake efficiency, limiting the degree of engine strengthening, and low cooling water flow and flow rate in the nose bridge area of ​​the cylinder head. The effect of improving cooling efficiency and avoiding the problem of lubricating oil aging

Inactive Publication Date: 2016-05-11
WEICHAI POWER YANGZHOU DIESEL ENGINE
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AI-Extracted Technical Summary

Problems solved by technology

Cylinder heads with traditional structures cannot meet the requirements of future high-power-density, highly-strengthened light-duty engines in terms of performance and reliability
[0003] The intake port of the four-valve cylinder head of the current light engine generally adopts a combined intake port structure, with one intake port 1 for each cylinder, such as figure 1 As shown, in the intake process, there will be mutual interference between the two intake channels, which will affect the intake efficiency; at present, the cylinder head push rod hole 3 of the side camshaft is generally located on the side of the exhaust port 2, and the lubricating oi...
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Method used

As shown in Figure 3 and Figure 4, for a kind of light engine four-valve cylinder head provided by the present invention, described cylinder head inside is provided with push rod hole 3 and water jacket 4, and one side of described cylinder head is provided with There is an intake port 1, and an exhaust port 2 is provided on the other side. The intake port 1 is used to establish a channel between the intake manifold and the cylinder combustion chamber to provide a certain flow rate and form a certain air flow form for use For combustion, the interior of the cylinder head is divided into four compartments in the shape of a square. The water jacket is divided into an upper water jacket 41 and a lower water jacket 42. The upper water jacket 41 is arranged inside the cylinder head The upper side is mainly used for cooling the top plate and air passage of the cylinder head. The lower water jacket 42 is arranged on the inner lower side of the cylinder head and is mainly used for cooling the bottom plate and air passage of the lower side of the cylinder head. Between the upper water jacket 41 and the lower water jacket 42, there is a water channeling hole 5 connecting the two; the cooling water of the cylinder head enters the lower water jacket 42 from the exhaust side first, and preferentially cools the exhaust duct 2 and the exhaust nose bridge area with a higher temperature , and then flows through each nose bridge area. By controlling the flow cross-sectional area of ​​each water inlet, the effect of controlling the flow of coolant in different areas with different flow rates can be achieved, which can effectively improve the overall cooling efficiency of the cylinder head. Finally, the cooling water is supplied by the upper water on the intake side. The water channeling hole 5 between the jacket 41 and the lower water jacket 42 enters the upper water jacket 41, and then flows out of the cylinder head; the adjacent cylinders share an air inlet 1, and the cylinders share an air inlet 1 structure, Avoid the mutual interference of the intake air flow of the combined air inl...
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Abstract

The invention relates to the technical field of diesel cylinders and discloses a four-valve cylinder cover for a lightweight engine. Push rod holes and water jackets are arranged in the cylinder cover; air inlet channels are formed in one side of the cylinder cover; air exhaust channels are formed in the other side of the cylinder cover; the interior of the cylinder cover is divided into four partition cylinders; the water jackets include an upper water jacket and lower water jackets; the upper water jacket is arranged on the upper side in the cylinder cover; the lower water jackets are arranged on the lower side in the cylinder cover; a water channeling hole for communicating the upper water jacket and the lower water jackets is formed between the upper water jacket and the lower water jackets; two adjacent partition cylinders share one air inlet channel; and the push rod holes are arranged close to the corresponding air inlet channels. The four-valve cylinder cover can prevent intake flows from mutually interfering so as to improve the air inlet efficiency, can prevent the ageing problem of lubricating oil and can also improve the cooling efficiency.

Application Domain

Cylinder headsCylinders +1

Technology Topic

AirflowAge problems +5

Image

  • Four-valve cylinder cover for lightweight engine
  • Four-valve cylinder cover for lightweight engine
  • Four-valve cylinder cover for lightweight engine

Examples

  • Experimental program(1)

Example Embodiment

[0025] The specific embodiments of the present invention will be described in further detail below in conjunction with the drawings and embodiments. The following examples are used to illustrate the present invention, but not to limit the scope of the present invention.
[0026] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientation or positional relationship indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying The description does not indicate or imply that the pointed device or element must have a specific orientation, be configured and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.
[0027] Such as image 3 with Figure 4 Shown is a four-valve cylinder head for a light engine provided by the present invention. The cylinder head is provided with a push rod hole 3 and a water jacket 4, and one side of the cylinder head is provided with an intake port 1 and the other side An exhaust passage 2 is provided. The intake passage 1 is used to establish a passage between the intake manifold and the combustion chamber of the cylinder to provide a certain flow rate and form a certain air flow pattern for combustion. The cylinder head is internally separated The water jacket is divided into an upper water jacket 41 and a lower water jacket 42. The upper water jacket 41 is arranged on the inner upper side of the cylinder head and is mainly used for cooling the cylinder head. The upper top plate, air passage, etc., the lower water jacket 42 is arranged on the lower inner side of the cylinder head, and is mainly used to cool the bottom plate, air passage, etc., on the lower side of the cylinder head. The upper water jacket 41 and the lower water jacket 42 are There is a channeling hole 5 connecting the two; the cylinder head cooling water first enters the lower water jacket 42 from the exhaust side, and preferentially cools the exhaust duct 2 and the exhaust nose area with a higher temperature, and then flows through each nose area and passes Controlling the flow cross-sectional area of ​​each water inlet can achieve the effect of controlling the flow of different flows of coolant in different areas, effectively improving the overall cooling efficiency of the cylinder head, and finally the cooling water flows between the upper water jacket 41 and the lower water jacket 42 on the intake side. The blow-by hole 5 enters the upper water jacket 41, and then flows out of the cylinder head; the adjacent cylinders share an intake port 1, and the structure of the cylinders to share the same intake port 1 is adopted to avoid the intake of the combined intake port 1. The airflow interferes with each other; the push rod hole 3 is arranged close to the air inlet 1, so that the lubricating oil does not pass through the high temperature area, effectively avoiding the problem of lubricating oil aging, and effectively improving the maintenance and oil change cycle.
[0028] Further, between the upper water jacket 41 and the lower water jacket 42, a horizontally arranged intermediate partition 6 is also provided. The intermediate partition 6 has a significant contribution to improving the overall strength and rigidity of the cylinder head. The hole 5 is vertically arranged on the intermediate partition 6.
[0029] Wherein, the upper water jacket 41 and the lower water jacket 42 are cast separately, and a complete intermediate partition 6 can be formed between the upper and lower water jackets 42, and the water channel 5 is also connected to the Upper water jacket 41 and lower water jacket 42.
[0030] The inner cylinder head is also provided with a fuel injector processing part, and the fuel injector processing part is processed with a vertical injector bottom hole 7 for installing the fuel injector; thus, it is more convenient to install the fuel injector. Avoid adding additional injector mounting parts to improve the overall strength and rigidity of the cylinder head.
[0031] In order to facilitate the manufacture, the processing part of the fuel injector and the upper water jacket 41 and the lower water jacket 42 are integrally cast.
[0032] Wherein, the upper water jacket 41 and the lower water jacket 42 are respectively arranged around the injector processing part, and a section of wall thickness is left between the bottom hole 7 of the injector and the upper water jacket 41 and the lower water jacket 42; Separate the fuel injector and cooling water.
[0033] Such as Image 6 As shown, each of the spacer cylinders is provided with a lower water jacket 42, and a reinforcing vertical plate 9 is provided at the connection of the adjacent spacer cylinders on the outer periphery of each of the lower water jacket 42; It refers to the cooling water flow direction 10; it is used to reduce the mutual influence of each cylinder while increasing the overall rigidity of the cylinder head; the intermediate partition 6, the reinforced vertical plate 9, and the directly cast injector bottom hole 7 can effectively improve the cylinder The strength and rigidity of the head can reduce the deformation of the cylinder head, and can increase the sealing performance of the cylinder gasket to meet the strength requirements of the high-strength light cylinder head.
[0034] Such as Figure 5 As shown, the intake port 8 is machined to form a smooth surface, which reduces the problem of air intake interception caused by casting tolerances and improves air intake efficiency.
[0035] For the arrangement of different valve angles, the technical solution that each cylinder share one intake port 1 is also applicable.
[0036] It can be seen from the above embodiments that the present invention can not only avoid the mutual interference of the intake air flow and improve the intake efficiency; it can also avoid the problem of lubricating oil aging, and can also improve the cooling efficiency.
[0037] The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the present invention. Within the scope of protection.

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Description & Claims & Application Information

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Owner:JIANGSU DONGSHUN NEW ENERGY TECH

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