Cylinder cover and engine
By setting up an inclined preheating plug hole in the nose bridge area of the diesel engine cylinder head and equipped with a load unloading slot, the problem of poor heating performance of the existing preheating plug hole is solved, and the cold start effect and reliability of the cylinder head are improved. Service life.
Patent Information
- Application Number
- CN202420037061.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-04
- Publication Date
- 2025-01-17
- Estimated Expiration
- 2034-01-04
AI Technical Summary
The existing diesel engines have difficulty in cold start in severe cold environments, mainly because the preheating plug hole on the cylinder head is located on the outer periphery, and the heating performance is poor, which affects the cold start effect.
Set the preheating plug hole in the nose bridge area of the cylinder head close to the injector installation hole, and use an inclined setting to reduce the distance from the injector installation hole, and set up an unloading groove in this area to reduce fatigue caused by deformation. Crack risk, improving structural compactness and reliability.
It effectively improves the cold start effect, saves space around the cylinder head, enhances heating performance, reduces the risk of fatigue and cracks, and improves the reliability and service life of the cylinder head.
Smart Images
Figure CN222363065U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of engines, and in particular relates to a cylinder cover and an engine. Background Art
[0002] In severe cold weather, it is difficult to cold-start a diesel engine, especially when the ambient temperature is very low and the fuel is diesel. This is because the internal temperature of the engine is too low during cold start, and the fuel is not easy to vaporize. Generally, a preheating plug is installed in the engine, which can improve the starting performance and provide heat energy. However, the preheating plug hole on the existing cylinder head is located on the periphery of the cylinder head, and the heating performance is poor, which affects the cold start effect. Utility Model Content
[0003] The purpose of the utility model is to at least solve the problem that the heating performance of the existing glow plug at the glow plug hole is poor. This purpose is achieved through the following technical solutions:
[0004] The first aspect of the utility model proposes a cylinder head, comprising a cylinder head body, wherein the cylinder head body is provided with an injector mounting hole, two air inlets and two exhaust ports, the two air inlets and the two exhaust ports are located at one axial end of the injector mounting hole, the two air inlets are spaced apart from each other and are arranged on one side of the injector mounting hole, the two exhaust ports are spaced apart from each other and are arranged on the other side of the injector mounting hole, an intake nose bridge area is formed between the two air inlets, a preheating plug hole is provided in the intake nose bridge area, and a unloading groove is further provided on the cylinder head body, the unloading groove is arranged in the intake nose bridge area, and the unloading groove is arranged on the side of the preheating plug hole away from the injector mounting hole.
[0005] According to the cylinder head of the utility model, the preheating plug hole is arranged at the entrance nose bridge area and is arranged close to the injector mounting hole, which can effectively play the role of the preheating plug in the preheating plug hole, supply heat to the injector in the injector mounting hole, and improve the cold start effect. Secondly, the preheating plug hole arranged in the entrance nose bridge area saves space arrangement around the cylinder head body, making the overall structure of the cylinder head more compact. In addition, the unloading groove can reduce the risk of fatigue cracks of the cylinder head caused by deformation at the entrance nose bridge area, thereby improving the reliability and service life of the cylinder head.
[0006] In addition, the cylinder head according to the utility model may also have the following additional technical features:
[0007] In some embodiments of the present invention, the glow plug hole is inclined relative to the injector mounting hole, and an angle A between an axis of the glow plug hole and an axis of the injector mounting hole is 70°-80°.
[0008] In some embodiments of the present invention, the shortest distance B between the axis of the glow plug hole and the axis of the injector mounting hole is 10-14 mm.
[0009] In some embodiments of the present invention, the shortest distance C between the unloading groove and the axis of the injector mounting hole is 16-20 mm.
[0010] In some embodiments of the present invention, the maximum depth D of the unloading groove is 1-2 mm.
[0011] In some embodiments of the utility model, the center of one of the two air inlets and the center of one of the two exhaust ports are symmetrical about the center of the injector mounting hole, and the line between the symmetrically arranged air inlet and exhaust ports is a first line, the line between the other of the two exhaust ports and the center of the injector mounting hole is a second line, and the first line and the second line are arranged perpendicularly.
[0012] In some embodiments of the present invention, a line connecting the other of the two air inlets and the center of the injector mounting hole is a third line, and an angle E between the third line and the second line is 2°-6°.
[0013] In some embodiments of the present invention, the shortest length of the nose bridge area along the first direction is 9-10 mm, and the first direction is the direction of the line connecting the centers of the two air inlets.
[0014] In some embodiments of the present invention, the cylinder head further comprises a wiring harness bracket, the wiring harness bracket and the two exhaust ports are located on opposite sides of the cylinder head body, and the wiring harness bracket and the preheating plug hole are staggered.
[0015] A second aspect of the utility model provides an engine having the above-mentioned cylinder head. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:
[0017] Figure 1 The structure diagram of the cylinder head according to the embodiment of the utility model is schematically shown;
[0018] Figure 2Schematically shows a structural schematic diagram of a cylinder head according to an embodiment of the utility model from another perspective;
[0019] Figure 3 for Figure 1 A schematic diagram of the partial structure of the cylinder head;
[0020] Figure 4 for Figure 1 Schematic diagram of the cross-sectional structure of the cylinder head.
[0021] The reference numerals in the accompanying drawings represent the following:
[0022] 100. Cylinder head;
[0023] 10. Cylinder head body; 11. Heat plug hole; 12. Injector mounting hole; 13. Air inlet; 14. Exhaust port; 15. Unloading groove; 16. Nose bridge area;
[0024] 20. Wire harness bracket;
[0025] 200, preheating plug;
[0026] 1. First connection; 2. Second connection; 3. Third connection. DETAILED DESCRIPTION
[0027] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.
[0028] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.
[0029] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.
[0030] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both upper and lower orientations. The device can be oriented otherwise (rotated 90 degrees or in other directions) and the spatial relative descriptors used in the text are interpreted accordingly.
[0031] In severe cold weather, it is difficult to cold-start a diesel engine, especially when the ambient temperature is very low and the fuel is diesel. This is because the internal temperature of the engine is too low during cold start, and the fuel is not easy to vaporize. Generally, a preheating plug is installed in the engine, which can improve the starting performance and provide heat energy. However, the preheating plug hole on the existing cylinder head is located on the periphery of the cylinder head, and the heating performance is poor, which affects the cold start effect.
[0032] Figure 1 The structural diagram of the cylinder head 100 according to the embodiment of the utility model is schematically shown. Figure 2 The structure diagram of the cylinder head 100 according to another embodiment of the present utility model is schematically shown. Figure 1 and 2As shown, the utility model proposes a cylinder head 100 and an engine. The cylinder head 100 in the utility model comprises a cylinder head body 10, on which an injector mounting hole 12, two air inlets 13 and two exhaust ports 14 are provided, the two air inlets 13 and the two exhaust ports 14 are located at one end of the axial direction of the injector mounting hole 12, the two air inlets 13 are spaced apart from each other and arranged on one side of the injector mounting hole 12, the two exhaust ports 14 are spaced apart from each other and arranged on the other side of the injector mounting hole 12, an inlet nose bridge area 16 is formed between the two air inlets 13, the inlet nose bridge area 16 is provided with a preheating plug hole 11, and a relief groove 15 is further provided on the cylinder head body 10, the relief groove 15 is arranged in the inlet nose bridge area 16, and the relief groove 15 is arranged on the side of the preheating plug hole 11 away from the injector mounting hole 12.
[0033] According to the cylinder head 100 of the utility model, the preheating plug hole 11 is arranged at the entrance nose bridge area 16 and is arranged close to the injector mounting hole 12, which can effectively play the role of the preheating plug 200 in the preheating plug hole 11, supply heat to the injector in the injector mounting hole 12, and improve the cold start effect. Secondly, the preheating plug hole 11 arranged at the entrance nose bridge area 16 saves the space arrangement around the cylinder head body 10, so that the overall structure of the cylinder head 100 is more compact. In addition, the unloading groove 15 can reduce the risk of fatigue cracks of the cylinder head 100 caused by deformation at the entrance nose bridge area 16, thereby improving the reliability and service life of the cylinder head 100.
[0034] In some embodiments of the present invention, Figure 4 As shown, the glow plug hole 11 is tilted relative to the injector mounting hole 12, and the angle A between the axis of the glow plug hole 11 and the axis of the injector mounting hole 12 is 70°-80°, preferably 75°. In this embodiment, in order to avoid interference between the glow plug hole 11 and other holes in the cylinder head body 10, the glow plug hole 11 is tilted, that is, one end of the glow plug hole 11 is set toward the injector mounting hole 12, and the other end of the glow plug hole 11 is set away from the injector mounting hole 12, and one end of the glow plug hole 11 is located between the injector mounting hole 12 and the unloading groove 15, so that the glow plug hole 11 can be set closer to the injector mounting hole 12, and then when the engine is cold started, the distance between the glow plug 200 in the glow plug hole 11 and the injector mounting hole 12 is reduced, the heating effect of the injector in the injector mounting hole 12 is improved, and the cold start effect is improved.
[0035] Specifically, in this embodiment, the angle between the axis of the glow plug hole 11 and the axis of the injector mounting hole 12 is preferably 75°, which can best improve the heating effect of the glow plug 200 in the glow plug hole 11 on the injector in the injector mounting hole 12. If the angle is too large, the cylinder head body 10 between the glow plug hole 11 and the injector mounting hole 12 may be thinner, reducing the strength of the cylinder head body 10 at this point and easily causing fracture. If the angle is too large, the heating effect at 75° will not be achieved, which reduces the cold start effect of the engine.
[0036] In some embodiments of the present invention, Figure 4 As shown, the shortest distance B between the axis of the preheating plug hole 11 and the axis of the injector mounting hole 12 is 10-14 mm, preferably 12 mm. In this embodiment, the above arrangement can ensure that a safe distance is maintained between the injector mounting hole 12 and the preheating plug hole 11, and while ensuring a certain heating effect of the preheating plug 200 in the preheating plug hole 11 on the injector in the injector mounting hole 12, the strength of the cylinder head body 10 between the injector mounting hole 12 and the preheating plug hole 11 can also be ensured, which not only improves the cold start effect but also avoids the risk of the cylinder head body 10 breaking.
[0037] In some embodiments of the present invention, Figure 4 As shown, the shortest distance C between the unloading groove 15 and the axis of the injector mounting hole 12 is 16-20 mm, preferably 18 mm. In this embodiment, when the engine is operating, the inlet nose bridge area 16 between the two intake ports 13 and the two exhaust ports 14 will generate certain stress, thereby causing fatigue to the cylinder head body 10. The unloading groove 15 can reduce the risk of fatigue cracks of the cylinder head 100 caused by deformation of the inlet nose bridge area 16.
[0038] In some embodiments of the present invention, Figure 4 As shown, the maximum depth D of the unloading groove 15 is 1-2 mm, preferably 1.5 mm. In this embodiment, the above arrangement can not only ensure that the cylinder head body 10 does not lose a certain strength, but also reduce the risk of fatigue cracks of the cylinder head 100 caused by deformation of the nose bridge area 16, thereby improving the reliability and service life of the cylinder head body 10.
[0039] In some embodiments of the present invention, Figure 3As shown, the center of one of the two air inlets 13 and the center of one of the two exhaust ports 14 are symmetrical about the center of the fuel injector mounting hole 12, and the connection line between the air inlet 13 and the exhaust port 14 arranged symmetrically is a first connection line, and the connection line between the other of the two exhaust ports 14 and the center of the fuel injector mounting hole 12 is a second connection line, and the first connection line is arranged perpendicularly to the second connection line. In this embodiment, the spacing between the two exhaust ports 14 and the one air inlet 13 and the fuel injector mounting hole 12 is equal, so that the spacing between the two exhaust ports 14 and the spacing between one exhaust port 14 and the one air inlet 13 are the same, that is, the width of the row nose bridge area and the intake and row nose bridge area is the same, so as to ensure the stability of gas flow when the cylinder head 100 is in operation.
[0040] In some embodiments of the present invention, Figure 3 As shown, the line between the other of the two air inlets 13 and the center of the injector mounting hole 12 is the third line, and the angle E between the third line and the second line is 2°-6°, preferably 4°. In this embodiment, the above arrangement can increase the width of the nose bridge area 16 along the first direction, thereby providing convenience for the arrangement of the preheating plug hole 11, meeting the arrangement of the preheating plug hole 11, and optimizing the arrangement space. At the same time, it is also convenient to increase the area of the unloading groove 15, thereby further reducing the risk of fatigue cracks of the cylinder head 100 caused by deformation of the nose bridge area 16.
[0041] In some embodiments of the present invention, the shortest length of the nose bridge area 16 along the first direction is 9-10 mm, preferably 9.4 mm, and the first direction is the direction of the line between the centers of the two air inlets 13. In this embodiment, the above arrangement can increase the width of the nose bridge area 16 compared with the existing structure, thereby providing convenience for the arrangement of the preheating plug hole 11, meeting the arrangement of the preheating plug hole 11, and further optimizing the arrangement space.
[0042] In some embodiments of the present invention, Figure 1 and 2 As shown, the cylinder head 100 further includes a harness bracket 20, which is located on opposite sides of the cylinder head body 10 from the two air inlets 13, and the harness bracket 20 is staggered with the glow plug hole 11. In this embodiment, the harness bracket 20 facilitates the support and fixation of the harness, thereby improving the stability of the harness, and the staggered arrangement of the harness bracket 20 and the glow plug hole 11 facilitates the harness and the glow plug 200 to not interfere with each other during installation, thereby improving reliability.
[0043] Specifically, the layout space of the cylinder head 100 wire harness is located on the top surface of the cylinder head, and the wire harness bracket 20 is used to fix the direction of the wire harness to ensure that the wire harness does not interfere with the internal components of the cylinder head cover, and the layout space is compact. The cylinder through-piece is arranged at the rear end of the cylinder head and is the wire harness outlet.
[0044] The utility model also provides an engine having the above-mentioned cylinder head 100.
[0045] According to the cylinder head 100 of the engine of the utility model, the preheating plug hole 11 is arranged at the entrance nose bridge area 16 and is arranged close to the injector mounting hole 12, which can effectively play the role of the preheating plug 200 in the preheating plug hole 11, supply heat to the injector in the injector mounting hole 12, and improve the cold start effect. Secondly, the preheating plug hole 11 arranged at the entrance nose bridge area 16 saves the space arrangement around the cylinder head body 10, so that the overall structure of the cylinder head 100 is more compact. In addition, the unloading groove 15 can reduce the risk of fatigue cracks of the cylinder head 100 caused by deformation at the entrance nose bridge area 16, thereby improving the reliability and service life of the cylinder head 100.
[0046] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. A cylinder head, characterized in that: It includes a cylinder head body, on which an injector mounting hole, two air inlets and two exhaust ports are provided, the two air inlets and the two exhaust ports are located at one axial end of the injector mounting hole, the two air inlets are spaced apart from each other and are arranged on one side of the injector mounting hole, the two exhaust ports are spaced apart from each other and are arranged on the other side of the injector mounting hole, an inlet nose bridge area is formed between the two air inlets, a preheating plug hole is provided in the inlet nose bridge area, and a unloading groove is also provided on the cylinder head body, the unloading groove is arranged in the inlet nose bridge area, and the unloading groove is arranged on the side of the preheating plug hole away from the injector mounting hole.
2. The cylinder head according to claim 1, characterized in that: The glow plug hole is inclined relative to the injector mounting hole, and an angle A between an axis of the glow plug hole and an axis of the injector mounting hole is 70°-80°.
3. The cylinder head according to claim 1, characterized in that: The shortest distance B between the axis of the glow plug hole and the axis of the injector mounting hole is 10-14 mm.
4. The cylinder head according to claim 1, characterized in that: The shortest distance C between the unloading groove and the axis of the injector mounting hole is 16-20 mm.
5. The cylinder head according to claim 1, characterized in that: The maximum depth D of the unloading groove is 1-2 mm.
6. The cylinder head according to claim 1, characterized in that: The center of one of the two air inlets and the center of one of the two exhaust ports are symmetrical about the center of the injector mounting hole, and a line connecting the symmetrically arranged air inlet and exhaust ports is a first line, a line connecting the other of the two exhaust ports and the center of the injector mounting hole is a second line, and the first line and the second line are arranged perpendicularly.
7. The cylinder head according to claim 6, characterized in that A line connecting the other of the two air inlets and the center of the injector mounting hole is a third line, and an angle E between the third line and the second line is 2°-6°.
8. The cylinder head according to claim 1, characterized in that The shortest length of the nose bridge area along the first direction is 9-10 mm, and the first direction is the direction of the line connecting the centers of the two air inlets.
9. The cylinder head according to claim 1, characterized in that: The cylinder head further comprises a harness bracket, wherein the harness bracket and the two exhaust ports are located on opposite sides of the cylinder head body, and the harness bracket and the heating plug hole are staggered.
10. An engine, characterized in that: A cylinder head according to any one of claims 1 to 9 is provided.