Cylinder body, engine and vehicle

Abstract

The invention discloses a cylinder block, an engine and a vehicle, the cylinder block comprises a cylinder block body, and along the length direction of the cylinder block body, the wall thickness of the skirt part of the cylinder block body is configured to be a fusiform structure with a thick middle part and two thin sides. Therefore, in the length direction of the cylinder block body, the wall thickness of the skirt part of the cylinder block body is constructed to be of the fusiform structure with the thick middle and the two thin sides, the overall strength and rigidity of the cylinder block are improved, and therefore the suspension bearing requirement of a long cylinder block is met.

Description

Technical Field

[0001] The present invention relates to the technical field of engines, and in particular to a cylinder block, an engine and a vehicle. Background Art

[0002] As the largest and heaviest part of the engine assembly, the cylinder block not only has to withstand the increasingly high explosion pressure and high heat load, but also provides a suspension fixing point for the entire powertrain and withstands the vibration of the assembly. In particular, as the engine displacement increases, the length of the cylinder block also increases. However, the current strength and rigidity of the cylinder block cannot meet the suspension load-bearing requirements of a longer cylinder block. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the first object of the present invention is to provide a cylinder block, which is conducive to improving the overall strength and rigidity of the cylinder block by configuring the wall thickness of the skirt of the cylinder block body to be a shuttle-shaped structure with a thick middle and thin sides in the length direction of the cylinder block body, thereby meeting the suspension load requirements of a longer cylinder block.

[0004] The second object of the present invention is to provide an engine.

[0005] A third object of the present invention is to provide a vehicle.

[0006] To achieve the above object, a first embodiment of the present invention provides a cylinder block, comprising:

[0007] The cylinder body has a skirt wall thickness structure that is thick in the middle and thin at both sides along the length direction of the cylinder body.

[0008] According to the cylinder block of the embodiment of the present invention, in the length direction of the cylinder block body, by constructing the skirt wall thickness of the cylinder block body into a shuttle-shaped structure that is thick in the middle and thin on both sides, it is beneficial to improve the overall strength and rigidity of the cylinder block, thereby meeting the suspension load-bearing requirements of a longer cylinder block.

[0009] In some examples of the present invention, a plurality of suspension bracket fixing parts are disposed on the outer surface of the cylinder body, and the mounting surfaces of the plurality of suspension bracket fixing parts are located in the same plane.

[0010] In some examples of the present invention, the wall thickness of the skirt corresponding to the suspension bracket fixing portion is d, satisfying the relationship: 10 mm ≤ d ≤ 15 mm.

[0011] In some examples of the present invention, the cylinder body has a plurality of cylinder holes arranged at intervals along the length direction of the cylinder body, and a cooling channel is provided on the cylinder wall between two adjacent cylinder holes, and the cross section of the cooling channel is an oblong hole.

[0012] In some examples of the present invention, the cooling passage is provided near the open end of the cylinder bore.

[0013] In some examples of the present invention, a cooling water jacket is provided in the cylinder body, the cooling water jacket is arranged around a plurality of cylinder holes, and along the height direction of the cylinder body, the upper width of the cooling water jacket is greater than the lower width of the cooling water jacket.

[0014] In some examples of the present invention, a cooling water jacket is disposed near an open end of the cylinder bore.

[0015] In some examples of the present invention, the cooling water jacket is in communication with the cooling channel.

[0016] To achieve the above-mentioned object, a second embodiment of the present invention provides an engine, comprising the cylinder block of the first embodiment.

[0017] According to the engine of the embodiment of the present invention, by setting the above-mentioned cylinder block, in the length direction of the cylinder block body, by constructing the skirt wall thickness of the cylinder block body into a shuttle-shaped structure that is thick in the middle and thin on both sides, it is beneficial to improve the overall strength and rigidity of the cylinder block, thereby meeting the suspension load-bearing requirements of a longer cylinder block.

[0018] To achieve the above-mentioned object, a third aspect of the present invention provides a vehicle, characterized in that it includes the engine of the second aspect.

[0019] According to the vehicle of the embodiment of the present invention, by setting the above-mentioned engine, in the length direction of the cylinder body, by constructing the skirt wall thickness of the cylinder body into a shuttle-shaped structure that is thick in the middle and thin on both sides, it is beneficial to improve the overall strength and rigidity of the cylinder body, thereby meeting the suspension load-bearing requirements of a longer cylinder body.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 is a front view of a cylinder block according to an embodiment of the present invention;

[0023] Figure 2 yes Figure 1 Partial cross-sectional views at AA, BB, CC, and DD;

[0024] Figure 3 is a cross-sectional view of a cylinder block according to an embodiment of the present invention from a first perspective;

[0025] Figure 4 yes Figure 3 A partial enlarged view of point E in the middle;

[0026] Figure 5 is a cross-sectional view of a cylinder block according to an embodiment of the present invention from a second perspective;

[0027] Figure 6 FIG. 1 is a schematic diagram of a cylinder block and a chiller according to an embodiment of the present invention.

[0028] Reference numerals:

[0029] Cylinder block 100;

[0030] Cylinder body 1; skirt wall thickness 11; suspension bracket fixing portion 12; cylinder bore 13; cooling channel 14; cooling water jacket 15; cylinder liner 16;

[0031] Chill 200; length direction X; height direction Y. DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] It should be noted that the cylinder block, as the largest and most massive part in the engine assembly, not only has to withstand the increasingly high explosion pressure and high heat load, but also has to provide a suspension fixing point for the entire powertrain and withstand the vibration of the assembly. In particular, as the engine displacement increases, the length of the cylinder block also increases accordingly. However, the current strength and rigidity of the cylinder block are difficult to meet the suspension load-bearing requirements of a longer cylinder block.

[0034] Based on this, the present application proposes a cylinder block 100. In the length direction X of the cylinder block body 1, by constructing the skirt wall thickness 11 of the cylinder block body 1 into a shuttle-shaped structure that is thick in the middle and thin on both sides, it is beneficial to improve the overall strength and rigidity of the cylinder block 100, thereby meeting the suspension load-bearing requirements of the longer cylinder block 100.

[0035] The following describes a cylinder block 100 , an engine, and a vehicle according to embodiments of the present invention with reference to the accompanying drawings.

[0036] like Figure 1-Figure 6 As shown, the cylinder block 100 according to the first embodiment of the present invention comprises: a cylinder body 1, along the length direction X of the cylinder body 1, the skirt wall thickness 11 of the cylinder body 1 is constructed as a shuttle-shaped structure with thick middle and thin sides.

[0037] Specifically, if Figure 1 As shown, along the length direction X of the cylinder block body 1, the cylinder block body 1 can be simplified as a simply supported beam. Generally speaking, the middle part of the cylinder block body 1 needs to suspend the power assembly, so the middle part of the cylinder block body 1 needs to withstand a larger power assembly impact load. If the structural strength of the middle part of the cylinder block body 1 is insufficient, the cylinder block body 1 will bend and deform under a larger impact load.

[0038] Based on this, combined Figure 1 and Figure 2 As shown, in the length direction X of the cylinder body 1, the skirt wall thickness 11 of the cylinder body 1 can be constructed as a shuttle-shaped structure with a thick middle and thin sides. Specifically, as shown in FIG. Figure 2 As shown, AA, BB, CC, and DD are partial cross-sectional views of the cylinder body 1, respectively, wherein the skirt wall thickness 11 at BB and CC is greater than the skirt wall thickness 11 at AA and DD, that is, from left to right along the length direction X of the cylinder body 1, the skirt wall thickness 11 first increases and then decreases, and the skirt wall thickness 11 of the cylinder body 1 as a whole presents a shuttle-shaped structure that is thick in the middle and thin on both sides. Such a configuration is beneficial to improving the overall strength and rigidity of the cylinder body 100, and the middle part of the cylinder body 1 can withstand more impact loads. Therefore, for a longer cylinder body 1, the suspension load-bearing requirement of the longer cylinder body 100 is met by increasing the skirt wall thickness 11 in the middle area of ​​the cylinder body 1.

[0039] According to the cylinder block 100 of the embodiment of the present invention, in the length direction X of the cylinder block body 1, by constructing the skirt wall thickness 11 of the cylinder block body 1 into a shuttle-shaped structure that is thick in the middle and thin on both sides, it is beneficial to improve the overall strength and rigidity of the cylinder block 100, thereby meeting the suspension load-bearing requirements of the longer cylinder block 100.

[0040] It should be noted that during the casting process of the cylinder block 100 blank, Figure 6As shown, the main bearing seat area in the cylinder body 1 is cooled by a chiller 200. This is because during the engine combustion process, the force of the gas work is transmitted to the main bearing seat area in the cylinder body 100 through the piston, connecting rod and crankshaft. The main bearing seat area of ​​the cylinder body 100 is subjected to a large impact force. Therefore, in order to ensure the reliable operation of the engine, the strength requirements of its main bearing seat area are relatively high. However, for ordinary sand casting cylinder bodies, the mechanical properties of the area that solidifies first are better. Therefore, a chiller 200 is additionally arranged in the main bearing area. The chiller 200 is pre-arranged in the sand mold. During the casting process, the chiller 200 can wrap the front and rear sides of the main bearing seat, thereby accelerating the cooling speed of the main bearing seat area, and then strengthening the strength of the main bearing seat area. In order to further achieve differential strengthening of the main bearing seat area of ​​the multi-cylinder engine, a cooling channel 14 can be set in the chiller 200, or a liquid with a large latent heat of vaporization such as liquid nitrogen can be pre-filled, thereby achieving additional strengthening of the mechanical properties of the thrust main bearing seat.

[0041] In some examples of the present invention, Figure 1 As shown, a plurality of suspension bracket fixing portions 12 are provided on the outer surface of the cylinder body 1, and the mounting surfaces of the plurality of suspension bracket fixing portions 12 are located in the same plane.

[0042] Specifically, Figure 1 Taking the left side view of the cylinder body 1 shown as an example for explanation, the cylinder body 1 is arranged longitudinally (in the length direction X), and a plurality of suspension bracket fixing parts 12 are provided on the left side of the cylinder body. It can be understood that in order to ensure the balanced installation of the cylinder body 1, a plurality of suspension bracket fixing parts 12 can also be provided on the right side of the cylinder body, and the suspension bracket fixing parts 12 on the left and right sides can be symmetrically arranged. Further, as a specific example, four suspension bracket fixing parts 12 are provided on the left side of the cylinder body 1, and the four suspension bracket fixing parts 12 present a closed rectangular structure, and the mounting surfaces of the four suspension bracket fixing parts 12 are located in the same plane. In this way, the step difference of two or three suspension bracket mounting surfaces can be avoided, thereby avoiding the internal stress generated by the cylinder body 100.

[0043] It should be noted that the suspension bracket fixing portion 12 can be placed as close to the outer surface of the cylinder body 1 as possible during the installation process, so as to further improve the structural strength near the suspension bracket fixing portion 12 .

[0044] In some examples of the present invention, the skirt wall thickness 11 corresponding to the suspension bracket fixing portion 12 is d, satisfying the relationship: 10 mm ≤ d ≤ 15 mm.

[0045] Specifically, the suspension bracket fixing portion 12 of the cylinder body 1 is usually used to cooperate with the installation of the engine front chain system, the traditional accessory system and the rear flywheel system. Therefore, the suspension bracket fixing portion 12 usually needs to bear a large impact load. However, the skirt wall thickness 11 of the traditional cylinder body 100 is 5±0.5mm, which is difficult to meet the load-bearing requirements. Based on this, the present invention increases the skirt wall thickness 11 corresponding to the suspension bracket fixing portion 12. For example, refer to Figure 2 As shown, the wall thicknesses of the skirt sections of AA, BB, CC, and DD from left to right are 5mm, 10mm, 15mm, and 5mm, respectively. The overall skirt wall thickness 11 presents a variation relationship of normal wall thickness, thickening, thickening, and normal wall thickness. Among them, the skirt wall thickness 11 corresponding to the suspension bracket fixing portion 12 is larger than the wall thickness at the ordinary position. Such an arrangement greatly improves the impact resistance of the suspension bracket fixing portion 12 out of the cylinder body 1.

[0046] In some examples of the present invention, Figure 3 and Figure 4 As shown, along the length direction X of the cylinder body 1, the cylinder body 1 has a plurality of cylinder holes 13 arranged at intervals, and a cooling channel 14 is provided on the cylinder wall between two adjacent cylinder holes 13, and the cross section of the cooling channel 14 is an oblong hole.

[0047] The cylinder body 1 has a plurality of cylinder holes 13 arranged at intervals along the length direction X. The number of the cylinder holes 13 is set according to actual needs, such as a three-cylinder engine, a four-cylinder engine, a six-cylinder engine, an eight-cylinder engine, etc. In some embodiments of the present invention, Figure 3 As shown, the cylinder body 1 is provided with four cylinder holes 13 arranged at intervals. Figure 4 As shown, the cylinder wall between two adjacent cylinder holes 13 is provided with a cooling channel 14 with an oblong hole cross section. Optionally, the oblong hole cooling channel 14 is cast, and compared with the traditional machined oblique circular hole, the cooling area of ​​the oblong hole is increased by 4 times, thereby greatly improving the cooling effect of the cylinder hole 13.

[0048] It should be noted that the overall rigidity of the aluminum alloy cylinder block 100 is inferior to that of the cast iron cylinder block 100, especially in the face of high explosion and heat load, the ability of the aluminum alloy cylinder block 100 to resist deformation is even worse. Figure 4 As shown, a cast iron cylinder liner 16 can be used to improve the overall rigidity of the aluminum alloy cylinder block 100. However, for a cylinder block 100 with a large number of cylinder holes 13 or a V-type engine cylinder block 100, it is very difficult to ensure the position of the cylinder liner 16. Therefore, the present invention adopts an online heating process and a cold positioning device to achieve accurate positioning of the cylinder liner 16. Compared with the traditional cylinder liner 16 position accuracy, the positioning accuracy of the cylinder liner 16 is improved by 60%.

[0049] In some examples of the present invention, the cooling channel 14 is disposed near the open end of the cylinder hole 13. That is, the cooling channel 14 with an oblong hole is disposed at the open end of the cylinder hole 13. It should be noted that the open end of the cylinder hole 13 is closer to the top dead center position of the piston, and the temperature at the top dead center position of the piston is higher. In this way, disposing the cooling channel 14 near the open end of the cylinder hole 13 can improve the cooling effect on the cylinder hole 13.

[0050] In some examples of the present invention, Figure 5 and Figure 6 As shown, a cooling water jacket 15 is provided in the cylinder body 1 , and the cooling water jacket 15 is arranged around the plurality of cylinder holes 13 , and along the height direction Y of the cylinder body 1 , the upper width of the cooling water jacket 15 is greater than the lower width of the cooling water jacket 15 .

[0051] Specifically, the cooling water jacket 15 of the cylinder body 1 is arranged around the plurality of cylinder holes 13, and the cooling water jacket 15 can be configured as a continuous wave shape to match the shape of the cylinder hole 13, referring to Figure 6 As shown, the upper width of the cooling water jacket 15 is greater than the lower width of the cooling water jacket 15, that is, the cross-section of the cooling water jacket 15 presents a structure in which the upper water jacket is wide and the lower water jacket is narrow. In this way, more water flows in the wider area of ​​the cooling water jacket 15, thereby enhancing the cooling of the high-temperature area. For the non-high-temperature area, the width of the cooling water jacket 15 is smaller, thereby reducing the water flow and satisfying the moderate cooling of the non-high-temperature area.

[0052] In some examples of the present invention, the cooling water jacket 15 is disposed near the opening end of the cylinder bore 13. That is, the cylinder bore 13 presents different temperature gradients from the opening to the bottom wall, and the opening end of the cylinder bore 13 is a high-heat area. The cooling water jacket 15 is disposed near the opening end of the cylinder bore 13, so that the cooling water jacket 15 corresponds to the high-heat area, thereby achieving effective cooling of the corresponding high-heat area, which is beneficial to improving the cooling effect of the cylinder bore 13.

[0053] In some examples of the present invention, the cooling water jacket 15 is connected to the cooling channel 14. That is, the cooling water jacket 15 in the cylinder block 100 is connected to the cooling channel 14, and the cooling water can flow between the cooling water jacket 15 and the cooling channel 14, thereby ensuring the consistency of the cooling effect.

[0054] The engine according to the second embodiment of the present invention comprises the cylinder block 100 according to the first embodiment.

[0055] According to the engine of the embodiment of the present invention, by setting the above-mentioned cylinder block 100, in the length direction X of the cylinder block body 1, by constructing the skirt wall thickness 11 of the cylinder block body 1 into a shuttle-shaped structure that is thick in the middle and thin on both sides, it is beneficial to improve the overall strength and rigidity of the cylinder block 100, thereby meeting the suspension load-bearing requirements of the longer cylinder block 100.

[0056] A vehicle according to an embodiment of a third aspect of the present invention comprises the engine of an embodiment of the second aspect.

[0057] According to the vehicle of the embodiment of the present invention, by setting the above-mentioned engine, in the length direction X of the cylinder body 1, by constructing the skirt wall thickness 11 of the cylinder body 1 into a shuttle-shaped structure that is thick in the middle and thin on both sides, it is beneficial to improve the overall strength and rigidity of the cylinder body 100, thereby meeting the suspension load-bearing requirements of the longer cylinder body 100.

[0058] It should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" 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, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0060] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A cylinder block, characterized in that: include: The cylinder body has a skirt wall thickness that is thick in the middle and thin at both sides in the length direction of the cylinder body.

2. The cylinder block according to claim 1, characterized in that: The outer surface of the cylinder body is provided with a plurality of suspension bracket fixing parts, and the mounting surfaces of the plurality of suspension bracket fixing parts are located in the same plane.

3. The cylinder block according to claim 2, characterized in that: The skirt wall thickness corresponding to the suspension bracket fixing portion is d, which satisfies the relationship: 10mm≤d≤15mm.

4. The cylinder block according to claim 1, characterized in that: Along the length direction of the cylinder body, the cylinder body has a plurality of cylinder holes arranged at intervals, and a cooling channel is provided on the cylinder wall between two adjacent cylinder holes, and the cross section of the cooling channel is an oblong hole.

5. The cylinder block according to claim 4, characterized in that: The cooling channel is arranged near the opening end of the cylinder hole.

6. The cylinder block according to claim 4, characterized in that: A cooling water jacket is provided in the cylinder body, and the cooling water jacket is arranged around the plurality of cylinder holes. In the height direction of the cylinder body, the upper width of the cooling water jacket is greater than the lower width of the cooling water jacket.

7. The cylinder block according to claim 6, characterized in that The cooling water jacket is arranged near the opening end of the cylinder hole.

8. The cylinder block according to claim 6, characterized in that: The cooling water jacket is in communication with the cooling channel.

9. An engine, characterized in that: Comprising a cylinder block according to any one of claims 1-8.

10. A vehicle, characterized in that: Comprising an engine according to claim 9.

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