Cylinder cover of engine and engine
By designing an intake manifold, exhaust manifold, cooling air inlet, cooling air duct, and guide vane structure in the cylinder head, the problems of uneven cooling and insufficient strength of the cylinder head are solved, achieving efficient heat dissipation and structural reinforcement.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU CHANGFA AGRI EQUIP
- Filing Date
- 2025-07-11
- Publication Date
- 2026-04-21
AI Technical Summary
The cylinder head of a small air-cooled engine suffers from uneven cooling, low cooling efficiency, and insufficient structural strength, which affects its processing, forming, and performance.
Design a structure that includes a cylinder head, an intake manifold, an exhaust manifold, a cooling air inlet, a cooling air duct, and a guide vane. The guide vane will evenly guide the cooling air to the cooling air duct, reducing air loss. Additionally, guide vanes will be added inside the cylinder head to enhance structural strength.
It achieves efficient and uniform airflow for cooling, improves heat dissipation efficiency, enhances the structural strength of the cylinder head, and reduces stress deformation.
Smart Images
Figure CN224149692U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of power output, and in particular to a cylinder head and engine of an engine. Background Technology
[0002] For small air-cooled engines, features such as high RPM, strong combustion pressure, and forced air cooling meet various usage requirements. The cylinder head, in particular, has multiple functional requirements and a complex structure. The design of cylinder head cooling and its cooling ducts has always been a key challenge in the development of air-cooled engines. Furthermore, the main manufacturing process for the cylinder head is die-cast aluminum, so the structural design must consider the requirements of this process on the cylinder head's structure. Inadequate structural design can affect its processing and molding, increase cooling air loss, leading to uneven cooling, low cooling efficiency, and ultimately affecting the cylinder head's strength.
[0003] Therefore, it is necessary to provide an engine cylinder head and an engine to overcome the defects mentioned above. Utility Model Content
[0004] The purpose of this invention is to provide an engine cylinder head and engine that reduces cooling air loss, efficiently and evenly guides cooling air to the cooling duct, and enhances cooling efficiency and cylinder head strength.
[0005] According to one aspect of the present invention, an engine cylinder head is provided, with the side of the engine where the fan is installed as the rear, including a cylinder head, an intake manifold, an exhaust manifold, a cooling air inlet, a cooling air duct, a guide vane, and a cooling air outlet.
[0006] The cylinder head includes a rear end face facing the fan and a front end face away from the fan; the intake manifold extends from the rear end face into the cylinder head and is connected to the engine cylinder to draw air into the cylinder for compression ignition; the exhaust manifold extends from the front end face into the cylinder head and is connected to the muffler to exhaust exhaust gases after engine combustion; the cooling air inlet is located on the right side of the cylinder head and near the rear end face to deliver air to the cylinder head to cool the high-temperature area of the exhaust manifold; the cooling air duct is located inside the cylinder head and is connected to the cooling air inlet.
[0007] The cooling air duct includes a first air duct and a second air duct. The first air duct extends along the cooling air inlet toward the front end face, and the second air duct is connected to the first air duct and extends along the right side of the cylinder head to the left.
[0008] The guide vane includes a first guide vane placed in the first air duct and extending in the vertical direction, the first guide vane being used to divide the first air duct into a first main air duct and a first auxiliary air duct; the cooling air outlet is connected to the second air duct and is used to exhaust the air from the cooling air duct.
[0009] The above scheme allows the airflow entering the cooling duct to be directly guided to the cooling duct without loss, reducing the loss of cooling air and increasing heat dissipation efficiency. At the same time, the increase in the number of guide plates increases the strength of the cylinder head and reduces the stress deformation of the cylinder head.
[0010] Preferably, the first guide vane includes a first end near the cooling air inlet and a second end away from the cooling air inlet, with the second end forming a first air outlet between it and the cylinder head, and the air from the first auxiliary air duct reaching the second air duct through the first air outlet.
[0011] Preferably, the guide plate further includes a second guide plate placed in the second air duct and near the second end. The second guide plate separates the second air duct into a second air outlet on the side near the first guide plate. The air from the first air outlet and the air from the first main air duct converge at the second air outlet and continue to flow into the second air duct.
[0012] Preferably, the deflector also includes a third deflector and a fourth deflector arranged sequentially alongside the second deflector in the front-rear direction. A third air vent is formed between the third deflector and the second deflector, a fourth air vent is formed between the third deflector and the fourth deflector, and a fifth air vent is formed between the fourth deflector and the outer wall of the intake duct. The air from the first main air duct also flows to the second air duct through the third, fourth, and fifth air vents. The above scheme helps to guide the cooling air, optimize the distribution of airflow, improve heat dissipation efficiency, and enhance the strength of the cylinder head.
[0013] Preferably, the cooling air duct further includes a third air duct connecting the second air duct and the cooling air outlet.
[0014] Preferably, the cylinder head further includes a fifth guide vane and a sixth guide vane disposed in the third air duct, the fifth and sixth guide vanes being arranged in a V-shape. This design helps to improve heat dissipation efficiency and enhance the strength of the cylinder head.
[0015] Preferably, the cooling air outlet is located on the left side of the cylinder head, and the cooling air outlet includes a first cooling air outlet near the front end face and a second cooling air outlet near the rear end face. The fifth guide plate is disposed towards the first cooling air outlet, and the sixth guide plate is disposed towards the second cooling air outlet.
[0016] Preferably, the cylinder head further includes bolt holes penetrating the cylinder head, including a first bolt hole and a second bolt hole located on both sides of the intake manifold and near the rear end face, and a third bolt hole and a fourth bolt hole located on both sides of the exhaust manifold and near the front end face, with the first bolt hole and the third bolt hole located on the right side of the cylinder head relative to the second bolt hole and the fourth bolt hole.
[0017] Preferably, the second end is close to the third bolt hole. This design improves the strength of the cylinder head and helps to prevent deformation at the location of the third bolt hole.
[0018] Preferably, the second guide plate is positioned between the first bolt hole and the third bolt hole.
[0019] Preferably, the cylinder head further includes an injector mounting hole through the cooling air duct for mounting an injector; preferably, the cylinder head further includes a pushrod chamber located on the left side of the cylinder head.
[0020] Preferably, an engine includes a cylinder block, a crankcase, a muffler, a fan, and a cylinder head as described above, wherein the cylinder head is fixed above the cylinder block, the crankcase is located below the cylinder block, and the muffler is connected to the cylinder head.
[0021] Preferably, an air-cooled single-cylinder engine includes a cylinder block, a crankcase, a muffler, and a cylinder head as described above. The cylinder head is fixed above the cylinder block, the crankcase is placed below the cylinder block, and the muffler is connected to the cylinder head.
[0022] This utility model provides a cylinder head machine and an engine. By designing the engine cylinder head, the cooling air entering the cylinder head can be guided directly to the cooling air duct with minimal loss, thereby improving heat dissipation efficiency. Furthermore, gaps are left at both ends of the guide vanes, so that a small amount of cooling air can still be dissipated at the original air loss points of the air duct. At the same time, the addition of guide vanes to the upper and lower body cavities increases the overall strength, reduces the stress deformation of the cylinder head, and improves the strength of the cylinder head. Attached Figure Description
[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:
[0024] Figure 1 This is a three-dimensional schematic diagram of the cylinder head;
[0025] Figure 2 This is a rear view of the cylinder head;
[0026] Figure 3 for Figure 2 A cross-sectional view along the AA direction;
[0027] Figure 4 for Figure 2 A cross-sectional view along the AA direction;
[0028] Figure 5 This is a front view of the cylinder head;
[0029] Figure 6 This is a three-dimensional schematic diagram of the engine.
[0030] Explanation of icon numbers:
[0031] 1. Cylinder head; 2. Intake manifold; 3. Cooling air inlet; 4. Cooling air duct; 5. Deflector; 6. Exhaust manifold; 7. Bolt hole; 8. Cooling air outlet; 9. Injector mounting hole; 10. Pushrod chamber; 101. Rear end face; 102. Front end face; 401. Third air duct; 402. Second air duct; 403. First air outlet; 404. Second air outlet; 405. Third air outlet; 406. Fourth air outlet; 407. Fifth air outlet; 408. First air duct; 408a. Auxiliary air duct; 408b, First main air duct; 501, Sixth guide vane; 502, Fifth guide vane; 503, Second guide vane; 504, Third guide vane; 505, First guide vane; 506, Fourth guide vane; 701, Fourth bolt hole; 702, Third bolt hole; 703, Second bolt hole; 704, First bolt hole; 801, First cooling air outlet; 802, Second cooling air outlet; 100, Engine; A1, Muffler; A2, Cylinder block; A3, Crankcase. Detailed Implementation
[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0033] To keep the drawings concise, only the parts relevant to this invention are shown schematically in each figure, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some figures, only one of the components with the same structure or function is schematically depicted, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."
[0034] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.
[0035] In this document, 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 fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0036] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0037] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the specific implementation methods of this utility model will be described below with reference to the accompanying drawings. Obviously, the drawings described below are merely some embodiments of this utility model. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without any creative effort.
[0038] The embodiments for carrying out this application will be described based on the accompanying drawings. It should be noted that, in the following description, the direction of the straight line F is defined as "the front of the cylinder head" (refer to...). Figure 1 and Figure 2 Set the direction of line B to "rear of the cylinder head" (refer to...). Figure 1 and Figure 2 Set the direction of straight line L to "left of cylinder head" (refer to...). Figure 1 and Figure 2 Set the direction of straight line R to "right of the cylinder head" (refer to...). Figure 1 and Figure 2 Set the direction of line U to "upper part of cylinder head" (refer to...). Figure 1 and Figure 2 Set the direction of line D to "the bottom of the cylinder head" (refer to...). Figure 1 and Figure 2 ).
[0039] See Figures 1 to 6As shown, this embodiment provides a cylinder head 1 for an engine 100. Taking the side of the engine 100 where the fan A4 is installed as the rear, it includes a cylinder head 1, an intake manifold 2, an exhaust manifold 6, a cooling air inlet 3, a cooling air duct 4, a deflector 5, and a cooling air outlet 8. The cylinder head 1 includes a rear end face 101 facing the fan A4 and a front end face 102 away from the fan A4. The intake manifold 2 extends from the rear end face 101 into the interior of the cylinder head 1 and is connected to the cylinder of the engine 100 to draw air into the cylinder for compression ignition. The exhaust manifold 6 extends from the front end face 102 into the interior of the cylinder head 1 and is connected to the muffler A1 to discharge the exhaust gas after combustion in the engine 100. The cooling air inlet 3 is located on the right side of the cylinder head 1 and near the rear end face 101 to supply air to the cylinder head 1 to cool the high-temperature area of the exhaust manifold 6. The cooling air duct 4 is located in the cylinder head. The cylinder head 1 is connected to the cooling air inlet 3. The cooling air duct 4 includes a first air duct 408 and a second air duct 402. The first air duct 408 extends along the cooling air inlet 3 towards the front end face 102. The second air duct 402 is connected to the first air duct 408 and extends from the right side of the cylinder head 1 to the left side. The guide plate 5 includes a first guide plate 505 placed in the first air duct 408 and extending in the vertical direction. The first guide plate 505 is used to divide the first air duct 408 into a first main air duct 408b and a first auxiliary air duct 408a. The cooling air outlet 8 is connected to the second air duct 402 and is used to discharge the air from the cooling air duct 4. This allows the air entering the cooling air duct 4 to be directly guided to the cooling air duct 4 without loss, reducing the loss of cooling air and increasing the heat dissipation efficiency. At the same time, the increase in the guide plate 5 increases the strength of the cylinder head 1 and reduces the stress deformation of the cylinder head 1.
[0040] See Figure 3 and Figure 4 As shown, the first guide plate 505 includes a first end close to the cooling air inlet 3 and a second end away from the cooling air inlet 3. The second end forms a first air outlet 403 between itself and the cylinder head 1. The air from the first auxiliary air duct 408a reaches the second air duct 402 through the first air outlet 403.
[0041] The guide plate 5 also includes a second guide plate 503 placed in the second air duct 402 and near the second end. The second guide plate 503 separates the second air duct 402 into a second air outlet 404 on the side near the first guide plate 505. The air from the first air outlet 403 and the air from the first main air duct 408b converge into the second air outlet 404 and continue to flow into the second air duct 402.
[0042] The deflector 5 also includes a third deflector 504 and a fourth deflector 506 arranged sequentially alongside the second deflector 503 in the front-rear direction. A third air vent 405 is formed between the third deflector 504 and the second deflector 503, and a fourth air vent 406 is formed between the third deflector 504 and the fourth deflector 506. The fourth deflector 506 and the outer wall of the intake duct 2 form a fifth air vent 407. The air from the first main air duct 408b also flows to the second air duct 402 through the third air vent 405, the fourth air vent 406, and the fifth air vent 407, which helps to guide the cooling airflow, optimize the airflow distribution, improve heat dissipation efficiency, and enhance the strength of the cylinder head 1.
[0043] The cooling air duct 4 also includes a third air duct 401 that connects the second air duct 402 and the cooling air outlet 8.
[0044] The cylinder head 1 also includes a fifth guide plate 502 and a sixth guide plate 501 placed in the third air duct 401, with the fifth guide plate 502 and the sixth guide plate 501 arranged in a V-shape. This design helps to improve heat dissipation efficiency and enhance the strength of the cylinder head 1.
[0045] The cooling air outlet 8 is located on the left side of the cylinder head 1. The cooling air outlet 8 includes a first cooling air outlet 801 near the front end face 102 and a second cooling air outlet 802 near the rear end face 101. The fifth guide plate 502 is disposed towards the first cooling air outlet 801, and the sixth guide plate 501 is disposed towards the second cooling air outlet 802.
[0046] The cylinder head 1 also includes bolt holes 7 penetrating the cylinder head 1. The bolt holes 7 include a first bolt hole 704 and a second bolt hole 703 located on both sides of the intake manifold 2 and near the rear end face 101. The bolt holes 7 also include a third bolt hole 702 and a fourth bolt hole 701 located on both sides of the exhaust manifold 6 and near the front end face 102. The first bolt hole 704 and the third bolt hole 702 are located on the right side of the cylinder head 1 relative to the second bolt hole 703 and the fourth bolt hole 701. The second end is close to the third bolt hole 702, which helps to prevent deformation of the position of the third bolt hole 702. The second guide plate 503 is located between the first bolt hole 704 and the third bolt hole 702.
[0047] The cylinder head 1 also includes an injector mounting hole 9 through the cooling air duct 4 for mounting an injector; preferably, the cylinder head 1 also includes a push rod chamber 10 located on the left side of the cylinder head 1.
[0048] This embodiment also provides an engine 100, including a cylinder block A2, a crankcase A3, a muffler A1, a fan A4, and a cylinder head 1 as described above. The cylinder head 1 is fixed above the cylinder block A2, the crankcase A3 is placed below the cylinder block A2, and the muffler A1 is connected to the cylinder head 1.
[0049] Furthermore, this embodiment provides an air-cooled single-cylinder engine 100, including a cylinder block A2, a crankcase A3, a muffler A1, and a cylinder head 1 as described above. The cylinder head 1 is fixed above the cylinder block A2, the crankcase A3 is placed below the cylinder block A2, and the muffler A1 is connected to the cylinder head 1.
[0050] This utility model provides a cylinder head 1 and an engine 100. By designing the cylinder head 1 of the engine 100, the cooling air entering the cylinder head 1 can be guided directly to the cooling air duct 4 with minimal loss, thereby improving heat dissipation efficiency. Furthermore, gaps are left at both ends of the guide vanes, so that a small amount of cooling air can still be dissipated at the original air loss location of the air duct. At the same time, the addition of guide vanes to the upper and lower body cavities increases the overall strength, reduces the stress deformation of the cylinder head 1, and improves the strength of the cylinder head 1.
[0051] It will be apparent to those skilled in the art that various modifications and variations can be made to the exemplary embodiments of the present invention without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention cover modifications and variations falling within the scope of the appended claims and their equivalents.
Claims
1. An engine head, with the engine mounting fan side being the rear, characterized in that include: Cylinder head, the cylinder head including a rear end face facing the fan side and a front end face away from the fan side; An air intake manifold extends from the rear end toward the interior of the cylinder head and is connected to the cylinder of the engine to draw air into the cylinder for compression ignition. An exhaust duct extends from the front end toward the interior of the cylinder head, and the exhaust duct is connected to the muffler to discharge exhaust gases after engine combustion. A cooling air inlet is located on the right side of the cylinder head and close to the rear end face, for supplying air to the cylinder head to cool the high-temperature area of the exhaust passage; A cooling air duct is placed inside the cylinder head and connected to the cooling air inlet. The cooling air duct includes a first air duct and a second air duct. The first air duct extends along the cooling air inlet toward the front end face, and the second air duct is connected to the first air duct and extends along the right side of the cylinder head to the left. A guide vane, the guide vane including a first guide vane placed in the first air duct and extending in the vertical direction, the first guide vane being used to divide the first air duct into a first main air duct and a first auxiliary air duct; A cooling air outlet, which is connected to the second air duct, is used to discharge the air from the cooling air duct.
2. An engine cylinder head as claimed in claim 1, characterised in that The first guide vane includes a first end near the cooling air inlet and a second end away from the cooling air inlet. The second end forms a first air outlet between itself and the cylinder head. The air from the first auxiliary air duct reaches the second air duct through the first air outlet.
3. An engine cylinder head as claimed in claim 2, characterised in that The guide plate also includes a second guide plate placed in the second air duct and close to the second end. The second guide plate separates the second air duct into a second air outlet on the side close to the first guide plate. The air from the first air outlet and the air from the first main air duct converge at the second air outlet and continue to flow into the second air duct.
4. An engine cylinder head as claimed in claim 3, characterised in that The air guide plate also includes a third air guide plate and a fourth air guide plate arranged in parallel with the second air guide plate in the front-back direction. A third air outlet is formed between the third air guide plate and the second air guide plate, a fourth air outlet is formed between the third air guide plate and the fourth air guide plate, and a fifth air outlet is formed between the fourth air guide plate and the outer wall of the air intake.
5. An engine cylinder head as claimed in claim 4, characterised in that The cooling air duct also includes a third air duct connecting the second air duct and the cooling air outlet.
6. An engine cylinder head as claimed in claim 5 wherein, The cylinder head also includes a fifth guide plate and a sixth guide plate placed in the third air duct, the fifth guide plate and the sixth guide plate being arranged in a V-shape.
7. An engine cylinder head as claimed in claim 6, characterised in that The cooling air outlet is located on the left side of the cylinder head. The cooling air outlet includes a first cooling air outlet near the front end face and a second cooling air outlet near the rear end face. The fifth guide plate is disposed towards the first cooling air outlet, and the sixth guide plate is disposed towards the second cooling air outlet.
8. An engine cylinder head as claimed in claim 7, characterised in that The cylinder head also includes bolt holes penetrating the cylinder head. The bolt holes include a first bolt hole and a second bolt hole located on both sides of the intake manifold and close to the rear end face. The bolt holes also include a third bolt hole and a fourth bolt hole located on both sides of the exhaust manifold and close to the front end face. The first bolt hole and the third bolt hole are located on the right side of the cylinder head relative to the second bolt hole and the fourth bolt hole.
9. An engine cylinder head as claimed in claim 8, characterised in that The second guide plate is positioned between the first bolt hole and the third bolt hole.
10. An engine characterized by, The system includes a cylinder block, a crankcase, a muffler, and a cylinder head as described in any one of claims 1 to 9, wherein the cylinder head is fixed above the cylinder block, the crankcase is located below the cylinder block, and the muffler is connected to the cylinder head.