Engine block, engine, and vehicle

Abstract

An engine block, an engine, and a vehicle. The engine block comprises an upper block (2) and a lower block (1) which are connected; the lower block (1) comprises a lower framework (11) and main bearing seats (12); the lower framework (11) is provided with a first mounting surface (112) and a lower chamber (111) for accommodating part of a crankshaft; the first mounting surface (112) abuts against the upper block (2); the inner wall surface of the lower chamber (111) is provided with a plurality of first support members (13); the main bearing seats (12) are embedded in the lower chamber (111) of the lower framework (11); the number of the main bearing seats (12) is more than one, and the main bearing seats (12) are arranged at intervals in a first direction; the first support members (13) are attached on two opposite side surfaces of each main bearing seat (12) in the first direction and extend in the circumferential direction of the lower chamber (111); and the first direction is consistent with the axial direction of the lower chamber (111). The engine block has high structural strength, and when the engine operates, the main bearing seats (12) do not easily collide with the crankshaft and produce knocking noise due to shaking relative to the lower framework (11), so that the passenger has good riding experience.

Description

Engine cylinder block, engine and vehicle

[0001] Cross-reference to related applications

[0002] The present application is based on the Chinese patent application No. 202420752611.0, filed on April 11, 2024, and claims the priority of the Chinese patent application, the whole content of which is incorporated herein by reference. TECHNICAL FIELD

[0003] The present disclosure relates to the technical field of vehicles, in particular to an engine cylinder block, an engine and a vehicle. BACKGROUND

[0004] The engine cylinder block is the main structure of the engine, and is a supporting framework for mounting pistons, a crankshaft and other parts and accessories. The engine cylinder block includes a split cylinder block, i.e., an upper cylinder block and a lower cylinder block, and the mounting surfaces of the upper cylinder block and the lower cylinder block are flush with the axis of the crankshaft.

[0005] The upper cylinder block and the lower cylinder block in the engine cylinder block are respectively supported by a crankshaft support and a main bearing seat to support the crankshaft. However, in the related art, the main bearing seat on the lower cylinder block is embedded in the lower framework of the lower cylinder block, and the connection strength between the main bearing seat and the lower framework is poor. In a working condition with low background noise, such as vehicle idling power generation, engine driving vehicle low-speed running and the like, the main bearing seat is prone to shaking relative to the lower framework under the pressure of the crankshaft, and thus the main bearing seat collides with the crankshaft, and passengers in the vehicle are prone to perceive obvious engine low-frequency knocking noise when the engine is working, and the passenger vehicle experience is poor. SUMMARY

[0006] To solve the above technical problems, the present disclosure provides an engine cylinder block, an engine and a vehicle. The engine cylinder block has high structural strength, and when the engine is working, the main bearing seat is not prone to knocking noise caused by collision with the crankshaft due to shaking relative to the lower framework, and the passenger vehicle experience is good.

[0007] Embodiments of the present application also provide an engine.

[0008] Embodiments of the present application also provide a vehicle.

[0009] The engine cylinder body of the embodiment of the present application comprises a connected upper cylinder body and lower cylinder body, the lower cylinder body comprises a lower framework and a main bearing seat, the lower framework is provided with a first mounting surface and a lower chamber for accommodating part of a crankshaft, the first mounting surface abuts against the upper cylinder body, and the inner wall surface of the lower chamber is provided with a plurality of first support pieces; the main bearing seat is arranged in the lower chamber of the lower framework, the main bearing seat is arranged in a plurality of and is arranged in a spaced manner along a first direction, and the first support piece connects the lower framework and the main bearing seat, and the first direction is consistent with the axial direction of the lower chamber.

[0010] According to the engine cylinder body of the embodiment of the present application, when the main bearing seat is arranged in the lower chamber of the lower framework, the first support piece connects the lower framework and the main bearing seat of the lower cylinder body, so that the connection strength of the lower framework and the main bearing seat is improved, and the rigidity of the main bearing seat is improved. Under the support of the first support piece, when the main bearing seat is impacted by the crankshaft, the main bearing seat is less likely to deform and shake relative to the lower framework, and further, low-frequency knocking noise caused by the collision between the main bearing seat and the crankshaft due to rebound is effectively avoided, and the riding experience of passengers is good.

[0011] In some embodiments, the first support piece is connected to the opposite two side surfaces of each main bearing seat along the first direction.

[0012] In some embodiments, one end of the first support piece is connected to one end of the lower chamber along a second direction, the other end of the first support piece extends downward in an arc shape and then extends upward in an arc shape to be connected to the other end of the lower chamber along the second direction, and the bottom surface of the first support piece abuts against the inner wall surface of the lower chamber, wherein the second direction is perpendicular to the first direction.

[0013] In some embodiments, the upper cylinder body comprises an upper framework and a crankshaft support piece, the upper framework is provided with an upper chamber for accommodating part of a crankshaft, the inner wall surface of the upper chamber is provided with a plurality of second support pieces, the crankshaft support piece is arranged on the inner wall surface of the upper chamber, the crankshaft support piece is arranged in a plurality of and is arranged in a spaced manner along the first direction, and the second support piece is arranged in a matched manner on the opposite two side surfaces of each crankshaft support piece along the first direction and extends along the circumferential direction of the upper chamber.

[0014] In some embodiments, the opposite two end surfaces of the first support piece along the circumferential direction of the lower chamber are both connected to and coplanar with the first mounting surface.

[0015] And / or, the upper framework is provided with a second mounting surface in matched contact with the first mounting surface, the upper framework is provided with a piston hole, and the second support piece comprises a first support section and a second support section arranged on the two sides of the piston hole along the circumferential direction of the upper chamber, and the end surface of each of the first support section and the second support section away from the piston hole is connected to and coplanar with the second mounting surface.

[0016] In some embodiments, the first support member is in contact with and coplanar with the first mounting surface at opposite ends of the lower chamber in the circumferential direction, and the cross-sectional area of the first support member perpendicular to the circumferential direction of the lower chamber gradually decreases from the end portion to the middle portion of the first support member or decreases in steps.

[0017] In some embodiments, the first support member is arranged in pairs, and the number of pairs of the first support member is equal to the number of the main bearing seats.

[0018] In some embodiments, the second support member is arranged in pairs, and the number of pairs of the second support member is equal to the number of the crankshaft support members.

[0019] In some embodiments, the first support member has a dimension in the radial direction of the crankshaft of greater than or equal to 6 mm and a dimension in the first direction of greater than or equal to 4 mm.

[0020] In some embodiments, the second support member has a dimension in the radial direction of the crankshaft of greater than or equal to 6 mm and a dimension in the first direction of greater than or equal to 4 mm.

[0021] In some embodiments, the inner wall surface of the lower chamber is further provided with a plurality of pairs of third support members arranged in the first direction at intervals, the number of pairs of the third support members is equal to and corresponds to the number of the main bearing seats, each pair of the third support members is arranged in the second direction at intervals, the second direction, the first direction, and the depth direction of the lower chamber are perpendicular to each other, at least one of the third support members is provided with a ventilation passage or an oil return passage, the ventilation passage or the oil return passage penetrates the third support member and the lower frame in the depth direction of the lower chamber, and the main bearing seat is embedded between a corresponding pair of the third support members.

[0022] In some embodiments, the inner wall surface of the upper chamber is further provided with a plurality of pairs of fourth support members arranged in the first direction at intervals, the number of pairs of the fourth support members is equal to and corresponds to the number of the crankshaft support members, each pair of the fourth support members is arranged in the second direction at intervals, the second direction, the first direction, and the depth direction of the upper chamber are perpendicular to each other, at least one of the fourth support members is provided with a ventilation passage or an oil return passage, the ventilation passage or the oil return passage penetrates the fourth support member and the upper frame in the depth direction of the upper chamber, and the crankshaft support member is located between a corresponding pair of the fourth support members.

[0023] In some embodiments, the third support member has a dimension in the second direction of greater than or equal to 3 mm and less than or equal to 6 mm and a dimension in the first direction of greater than or equal to 4 mm.

[0024] And / or, the fourth support has a dimension in the second direction greater than or equal to 3mm and less than or equal to 6mm, and a dimension in the first direction greater than or equal to 4mm.

[0025] In some embodiments, the dimension in the first direction of any position of the third support gradually decreases or decreases in steps towards the direction close to the main bearing seat;

[0026] And / or, the dimension in the first direction of any position of the fourth support gradually decreases or decreases in steps towards the direction close to the crank support.

[0027] In some embodiments, both sides of the main bearing seat in the second direction are provided with protrusions, and the side of the third support towards the main bearing seat is provided with a groove, the width direction of the groove is consistent with the depth direction of the lower chamber, and the protrusions are fitted in the groove.

[0028] And / or, the side of the main bearing seat opposite to the first direction is provided with a weight-reducing hole and / or a weight-reducing groove.

[0029] The engine according to the embodiments of the present application comprises the engine block according to any of the above embodiments.

[0030] The engine according to the embodiments of the present application has the same technical advantages as the engine block according to the above embodiments, which will not be repeated here.

[0031] The vehicle according to the embodiments of the present application comprises the engine according to the above embodiments.

[0032] The vehicle according to the embodiments of the present application has the same technical advantages as the engine according to the above embodiments, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0033] The drawings incorporated in and forming a part of the specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the disclosure.

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, for those skilled in the art, other drawings can also be obtained from these drawings without creative labor, wherein:

[0035] FIG. 1 is an exploded view of an engine block according to an embodiment of the present application.

[0036] FIG. 2 is a schematic view of a lower block in an engine block according to an embodiment of the present application.

[0037] Fig. 3 is an exploded view of Fig. 2.

[0038] Fig. 4 is a schematic view of a crankshaft support in an engine block according to an embodiment of the present application.

[0039] Fig. 5 is a schematic view of an upper block in an engine block according to an embodiment of the present application. DETAILED DESCRIPTION

[0040] Embodiments of the present disclosure will be described in more detail with reference to the drawings. Although certain embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be embodied in various forms and should not be interpreted as being limited to the embodiments set forth herein, but rather, these embodiments are provided so that the present disclosure can be more thoroughly and completely understood. It should be understood that the drawings and embodiments of the present disclosure are only for illustrative purposes and are not intended to limit the scope of protection of the present disclosure.

[0041] The term "comprising" and variations thereof as used herein are used inclusively, i.e., "comprising, but not limited to". The term "based on" is "based at least in part on". The term "one embodiment" means "at least one embodiment". The term "another embodiment" means "at least one additional embodiment". The term "some embodiments" means "at least some embodiments". Related definitions are given throughout the description below. It should be noted that the concepts mentioned in the present disclosure are merely used for distinguishing different devices, modules or units, and are not intended to limit the functions of the devices, modules or units.

[0042] It should be noted that the terms "one", "multiple", mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise explicitly stated in the context, it should be understood as "one or more".

[0043] An engine block according to an embodiment of the present application will be described below with reference to Figs. 1-5.

[0044] The engine block according to an embodiment of the present application comprises an upper block 2 and a lower block 1 connected together, the lower block 1 comprising a lower frame 11 and a main bearing seat 12, the lower frame 11 being provided with a first mounting surface 112 and a lower chamber 111 for accommodating part of a crankshaft, the first mounting surface 112 abutting against the upper block 2, and an inner wall surface of the lower chamber 111 being provided with a plurality of first support members 13.

[0045] Exemplarily, the first support members 13 are arc-shaped support members.

[0046] The main bearing seat 12 is arranged in the lower chamber 111 of the lower frame 11, and is embedded in the lower chamber 111 of the lower frame 11, for example. The main bearing seat 12 is arranged in a plurality of and is arranged in a first direction. The first support 13 connects the lower frame 11 and the main bearing seat 12. The first direction is consistent with the axial direction of the lower chamber 111.

[0047] According to the engine block of the embodiment, when the main bearing seat 12 is arranged in the lower chamber 111 of the lower frame 11, the first support 13 connects the lower frame 11 and the main bearing seat 12 of the lower cylinder block 1. Thus, the connection strength of the lower frame 11 and the main bearing seat 12 is improved, and the rigidity of the main bearing seat 12 is improved. Under the support of the first support 13, when the main bearing seat 12 is impacted by the crankshaft, the main bearing seat 12 is less likely to deform and shake relative to the lower frame 11. Thus, the main bearing seat 12 is effectively prevented from colliding with the crankshaft due to rebound and generating low-frequency knocking noise. The passenger has a good riding experience.

[0048] In some embodiments, the first support 13 is connected to the opposite sides of each main bearing seat 12 in the first direction. Thus, under the support of the two first supports 13, when the main bearing seat 12 is impacted by the crankshaft, the main bearing seat 12 is less likely to deform and shake relative to the lower frame 11.

[0049] For example, the first support 13 is closely attached to the opposite sides of the main bearing seat 12 in the first direction.

[0050] In some embodiments, one end of the first support 13 is connected to one end of the lower chamber 111 in the second direction, the other end of the first support 13 extends downward in an arc shape and then extends upward in an arc shape to be connected to the other end of the lower chamber 111 in the second direction, and the bottom surface of the first support 13 abuts against the inner wall surface of the lower chamber 111. That is, the first support 13 is formed as an arc-shaped support towards the upper cylinder block 2.

[0051] The second direction is perpendicular to the first direction.

[0052] In this embodiment, the first support 13 extends along the circumference of the lower chamber 111, and the connection strength of the lower frame 11 and the main bearing seat 12 of the lower cylinder block 1 can be improved.

[0053] It should be noted that the first mounting surface 112 is provided with a first mounting hole, the main bearing seat 12 is provided with a second mounting hole, the upper frame 21 of the upper cylinder block 2 and the crankshaft support 22 are respectively provided with a third mounting hole and a fourth mounting hole, a first threaded member passes through the first mounting hole and the third mounting hole, and a second threaded member passes through the second mounting hole and the fourth mounting hole. The first threaded member and the second threaded member are used to connect the upper cylinder block 2 and the lower cylinder block 1. In addition, the engine block of the embodiment is a split type cylinder block. The first mounting surface 112 of the lower frame 11 is flush with the axis of the crankshaft, and the first direction is consistent with the axial direction of the crankshaft in the engine.

[0054] In some embodiments, as shown in FIG. 5, the upper cylinder body 2 comprises an upper framework 21 and a crankshaft support 22, the upper framework 21 is provided with an upper chamber 211 for accommodating part of the crankshaft, and the inner wall surface of the upper chamber 211 is provided with a plurality of second supports 23. The crankshaft support 22 is arranged on the inner wall surface of the upper chamber 211, and the crankshaft support 22 is arranged in a plurality of and spaced apart along the first direction, and the second support 23 is arranged on the two opposite side surfaces of each crankshaft support 22 along the first direction and extends along the circumference of the upper chamber 211.

[0055] The two opposite side surfaces of the crankshaft support 22 are connected to the second support 23, that is, the two second supports 23 connect the upper framework 21 and the crankshaft support 22 of the upper cylinder body 2, thereby improving the connection strength of the upper framework 21 and the crankshaft support 22, and improving the rigidity of the crankshaft support 22. Under the support of the two second supports 23, the crankshaft support 22 is less likely to deform and shake relative to the upper framework 21 when impacted by the crankshaft, thereby effectively avoiding the low-frequency knocking noise caused by the collision between the crankshaft support 22 and the crankshaft due to rebound, and improving the passenger's riding experience.

[0056] In some embodiments, as shown in FIG. 2, the first support 13 is in communication and coplanar with the first mounting surface 112 on the opposite ends of the lower chamber 111 along the circumference. That is, the first support 13 extends to the first mounting surface 112 of the lower framework 11, and at this time, the first support 13 also strengthens the strength of the wall where the first mounting surface 112 of the lower framework 11 is located, thereby effectively ensuring the rigidity of the lower framework 11.

[0057] And / or, as shown in FIG. 5, the upper framework 21 is provided with a second mounting surface 212 in contact with the first mounting surface 112, and the upper framework 21 is provided with a piston hole 213, and the second support 23 comprises a first support section 231 and a second support section 232 arranged on the two sides of the piston hole 213 along the circumference of the upper chamber 211, and the end surface of each of the first support section 231 and the second support section 232 away from the piston hole 213 is in communication and coplanar with the second mounting surface 212. That is, the first support section 231 and the second support section 232 of the second support 23 extend to the second mounting surface 212 of the upper framework 21, and at this time, the first support section 231 and the second support section 232 strengthen the strength of the wall where the second mounting surface 212 of the upper framework 21 is located, thereby effectively ensuring the rigidity of the upper framework 21.

[0058] For example, the first support 13 is connected to and coplanar with the first mounting surface 112 at opposite circumferential end surfaces of the lower chamber 111, and each of the first support section 231 and the second support section 232 is connected to and coplanar with the second mounting surface 212 at an end surface away from the piston hole 213. When the lower frame 11 and the upper frame 21 are connected, the end surface of the first support 13 also abuts and contacts the end surface of each of the first support section 231 and the second support section 232, thereby effectively increasing the contact area of the upper cylinder body 2 and the lower cylinder body 1, effectively increasing the connection strength of the upper cylinder body 2 and the lower cylinder body 1, and the overall stiffness of the engine cylinder body is higher, and is less likely to vibrate and make noise at low frequency when impacted by the crankshaft.

[0059] In some embodiments, the first support 13 is connected to and coplanar with the first mounting surface 112 at opposite circumferential end surfaces of the lower chamber 111, and the cross-sectional area of the first support 13 perpendicular to the circumference of the lower chamber 111 gradually decreases or stepwise decreases from the end portion to the middle portion of the first support 13.

[0060] At this time, when the first support 13 is integrally cast with the lower frame 11, the difficulty of forming the first support 13 is lower. At the same time, the first support 13 not only strengthens the connection strength of the lower frame 11 and the main bearing seat 12, but also effectively reduces the total weight of the first support 13, thereby reducing the manufacturing cost of the lower cylinder body 1.

[0061] In some embodiments, as shown in FIGS. 2 and 5, the first supports 13 are arranged in pairs, and the number of pairs of first supports 13 is equal to the number of main bearing seats 12. And / or, the second supports 23 are arranged in pairs, and the number of pairs of second supports 23 is equal to the number of crankshaft supports 22.

[0062] That is, different main bearing seats 12 correspond to different two first supports 13, and there are two first supports 13 between adjacent two main bearing seats 12. At this time, on the basis of ensuring that the first support 13 plays a good supporting effect on the main bearing seat 12, the two first supports 13 located between the adjacent two main bearing seats 12 can be arranged in the first direction. Compared with the above design in which the two first supports 13 are connected to form an integral body, the total weight of the first support 13 in this embodiment is lower, and the manufacturing cost of the lower cylinder body 1 is lower. Similarly, the pair arrangement of the second supports 23 also reduces the total weight of the second supports 23, thereby effectively reducing the manufacturing cost of the upper cylinder body 2.

[0063] Specifically, the first supports 13 are arranged in pairs, and the number of pairs of the first supports 13 is equal to the number of the main bearing seats 12. The second supports 23 are arranged in pairs, and the number of pairs of the second supports 23 is equal to the number of the crankshaft supports 22. The plurality of main bearing seats 12 are arranged at equal intervals along the first direction, and the plurality of pairs of the first supports 13 are arranged at equal intervals along the first direction. The plurality of crankshaft supports 22 are arranged at equal intervals along the first direction, and the plurality of pairs of the second supports 23 are arranged at equal intervals along the first direction.

[0064] In some embodiments, the first support 13 has a dimension in the radial direction of the crankshaft that is greater than or equal to 6 mm, and a dimension in the first direction that is greater than or equal to 4 mm. And / or, the second support 23 has a dimension in the radial direction of the crankshaft that is greater than or equal to 6 mm, and a dimension in the first direction that is greater than or equal to 4 mm.

[0065] By setting the dimension of the first support 13 in the radial direction of the crankshaft to be greater than or equal to 6 mm, the contact area between the first support 13 and the main bearing seat 12 is larger, the connection strength between the first support 13 and the main bearing seat 12 is higher, and the support strength of the first support 13 on the main bearing seat 12 is higher, while ensuring that the first support 13 does not interfere with the crankshaft. By setting the dimension of the first support 13 in the first direction to be greater than or equal to 4 mm, the contact area between the first support 13 and the inner wall surface of the lower chamber 111 is larger, the structural strength and rigidity of the first support 13 itself are higher, and the connection strength between the main bearing seat 12 and the lower frame 11 is further enhanced. Similarly, the above-mentioned size design of the second support 23 also effectively improves the connection strength of each of the upper frame 21 and the crankshaft support 22 with the second support 23.

[0066] Specifically, the minimum dimension of the first support 13 and the second support 23 in the radial direction of the crankshaft can be 6 mm, 8 mm, 10 mm, etc., and the minimum dimension of the first support 13 and the second support 23 in the first direction can be 4 mm, 6 mm, 8 mm, etc.

[0067] In some embodiments, as shown in FIGS. 2 and 5, the inner wall surface of the lower chamber 111 is further provided with a plurality of pairs of third supports 14 arranged at intervals along the first direction, the number of pairs of the third supports 14 is equal to and corresponds to the number of the main bearing seats 12, each pair of the third supports 14 is arranged at intervals along the second direction, the second direction, the first direction, and the depth direction of the lower chamber 111 are perpendicular to each other, at least one third support 14 is provided with a ventilation passage or an oil return passage, the ventilation passage or the oil return passage penetrates the third support 14 and the lower frame 11 along the depth direction of the lower chamber 111, and the main bearing seat 12 is embedded between a corresponding pair of the third supports 14.

[0068] The two third support members 14 provide joint support for the main bearing housing 12 in the second direction. Combined with the two first support members 13, the connection strength between the main bearing housing 12 and the lower frame 11 is further improved, and the support stiffness of the main bearing housing 12 is higher. As a result, when the engine is working and the crankshaft impacts the main bearing housing 12, the low-frequency knocking vibration and noise emitted by the engine block are lower, and the passenger riding experience is better.

[0069] In some embodiments, the inner wall of the upper chamber 211 is further provided with multiple pairs of fourth support members 24 arranged at intervals along a first direction. The number of pairs of fourth support members 24 is equal to the number of crankshaft support members 22 and corresponds one-to-one. Each pair of fourth support members 24 is arranged at intervals along a second direction. The second direction, the first direction and the depth direction of the upper chamber 211 are perpendicular to each other. At least one fourth support member 24 is provided with a ventilation channel or an oil return channel. The ventilation channel or oil return channel passes through the fourth support member 24 and the upper frame 21 along the depth direction of the upper chamber 211. The crankshaft support member 22 is located between the corresponding pair of fourth support members 24.

[0070] The two fourth support members 24 provide joint support for the crankshaft support member 22 in the second direction. Combined with the two second support members 23, this further improves the connection strength between the crankshaft support member 22 and the upper frame 21, resulting in higher support stiffness for the crankshaft support member 22. Consequently, the low-frequency knocking vibration and noise emitted by the engine block are reduced when the engine is running and the crankshaft impacts the main bearing housing 12, leading to a better passenger riding experience.

[0071] Specifically, the third support member 14 fills the gap between the inner wall of the lower chamber 111 and the main bearing seat 12 in the second direction, and each third support member 14 is fitted and connected to a first support member 13 on both opposite sides along the first direction. The fourth support member 24 fills the gap between the inner wall of the upper chamber 211 and the crankshaft support member 22 in the second direction, and each fourth support member 24 is fitted and connected to a second support member 23 on both opposite sides along the first direction.

[0072] In some embodiments, the third support member 14 has a dimension in the second direction greater than or equal to 3 mm and less than or equal to 6 mm, and a dimension in the first direction greater than or equal to 4 mm. And / or, the fourth support member 24 has a dimension in the second direction greater than or equal to 3 mm and less than or equal to 6 mm, and a dimension in the first direction greater than or equal to 4 mm.

[0073] With the above dimensions, reliable connection of each of the first support 13 and the main bearing seat 12 to the third support 14 is effectively ensured, the third support 14 has a better support effect on the main bearing seat 12, and the main bearing seat 12 has higher support stiffness. Also, reliable connection of each of the second support 23 and the crankshaft support 22 to the fourth support 24 is effectively ensured, the fourth support 24 has a better support effect on the crankshaft support 22, and the crankshaft support 22 has higher support stiffness.

[0074] Specifically, the minimum dimension of the third support 14 and the fourth support 24 in the second direction can be 3mm, 4mm, 5mm and 6mm, and the minimum dimension of the third support 14 and the fourth support 24 in the first direction can be 4mm, 6mm and 8mm.

[0075] It should be noted that the upper end surface of the third support 14 is adjacent to or coplanar with the first mounting surface 112 of the lower frame 11, and the lower end surface of the fourth support 24 is adjacent to or coplanar with the second mounting surface 212 of the upper frame 21.

[0076] In some embodiments, as shown in FIG. 2 and FIG. 5, the dimension of any position of the third support 14 in the first direction gradually decreases or decreases in steps towards the direction close to the main bearing seat 12. And / or, the dimension of any position of the fourth support 24 in the first direction gradually decreases or decreases in steps towards the direction close to the crankshaft support 22.

[0077] That is, the thickness of the part of the third support 14 close to the inner wall surface of the lower frame 11 is large, and the thickness of the part close to the main bearing seat 12 is small, and the thickness of the part of the fourth support 24 close to the inner wall surface of the upper frame 21 is large, and the thickness of the part close to the crankshaft support 22 is small, thereby ensuring the connection strength of the third support 14 and the lower frame 11, the connection strength of the fourth support 24 and the upper frame 21, while effectively avoiding the third support 14 and the fourth support 24 from occupying too much space in the lower chamber 111 and the upper chamber 211 to interfere with the crankshaft, and ensuring stable and reliable operation of the crankshaft.

[0078] Specifically, in the projection plane perpendicular to the depth direction of the lower chamber 111, the projection outer contour of the third support 14 and the fourth support 24 is trapezoidal.

[0079] Alternatively, the dimension of any position of the third support 14 and the fourth support 24 in the first direction can also be equal, that is, in the projection plane perpendicular to the depth direction of the lower chamber 111, the projection outer contour of the third support 14 and the fourth support 24 is rectangular.

[0080] In some embodiments, as shown in FIG. 4, the main bearing seat 12 is provided with a protrusion 123 on each side facing the second direction, and the third support 14 is provided with a groove facing the side of the main bearing seat 12, the width direction of the groove is consistent with the depth direction of the lower chamber 111, and the protrusion 123 is matched in the groove.

[0081] Therefore, when the main bearing seat 12 is embedded between the two third supports 14, the matching of the protrusion 123 and the groove effectively improves the connection strength of the main bearing seat 12 and the lower frame 11.

[0082] Specifically, the depth of the groove is between 1mm and 2mm, which not only guarantees the connection strength of the main bearing seat 12 and the lower frame 11, but also effectively avoids that the groove is too deep to cause high installation difficulty of the main bearing seat 12 in the lower chamber 111.

[0083] The side of the main bearing seat 12 facing the first direction is provided with a weight-reducing hole 121 and / or a weight-reducing groove 122. Therefore, while guaranteeing the support stiffness of the main bearing seat 12, the weight of the main bearing seat 12 is further reduced, and the manufacturing cost of the main bearing seat 12 is lower.

[0084] Specifically, the main bearing seat 12 is provided with two weight-reducing holes 121 and one weight-reducing groove 122.

[0085] The engine according to the embodiments of the present application comprises the engine block according to any of the above embodiments.

[0086] The technical advantages of the engine according to the embodiments of the present application are the same as those of the engine block according to the above embodiments, which will not be repeated here.

[0087] The vehicle according to the embodiments of the present application comprises the engine according to the above embodiments.

[0088] The technical advantages of the vehicle according to the embodiments of the present application are the same as those of the engine according to the above embodiments, which will not be repeated here.

[0089] In the description of the present disclosure, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present disclosure.

[0090] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0091] The above are merely specific embodiments of this disclosure, enabling those skilled in the art to understand or implement this disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An engine block comprising an upper block and a lower block connected together, the lower block comprising: a lower frame provided with a first mounting surface abutting against the upper block and a lower chamber for accommodating part of a crankshaft, an inner wall surface of the lower chamber being provided with a plurality of first support members; and a plurality of main bearing seats arranged in a first direction and spaced apart from each other in the lower chamber of the lower frame, the first support members connecting the lower frame and the main bearing seats, the first direction being consistent with an axial direction of the lower chamber.

2. The engine block according to claim 1, wherein the first support members are connected to opposite side surfaces of each of the main bearing seats in the first direction.

3. The engine block of claim 1, wherein one end of the first support is connected to one end of the lower chamber in the second direction, and the other end of the first support extends downward in an arc shape and then extends upward in an arc shape to be connected to the other end of the lower chamber in the second direction, and a bottom surface of the first support abuts an inner wall surface of the lower chamber. The second direction is perpendicular to the first direction.

4. The engine block according to claim 1, wherein the upper block comprises: an upper frame provided with an upper chamber for accommodating part of the crankshaft, an inner wall surface of the upper chamber being provided with a plurality of second support members; and a plurality of crankshaft support members arranged on the inner wall surface of the upper chamber, the second support members being arranged on opposite side surfaces of each of the crankshaft support members in the first direction and extending in a circumferential direction of the upper chamber.

5. The engine block according to claim 4, wherein opposite end surfaces of the first support members in the circumferential direction of the lower chamber are both abutted and coplanar with the first mounting surface; and / or, the upper frame is provided with a second mounting surface abutting against the first mounting surface, the upper frame is provided with a piston bore, the second support members comprise a first support section and a second support section arranged on opposite sides of the piston bore in the circumferential direction of the upper chamber, and end surfaces of each of the first support section and the second support section away from the piston bore are both abutted and coplanar with the second mounting surface.

6. The engine block according to claim 1, wherein opposite end surfaces of the first support members in the circumferential direction of the lower chamber are both abutted and coplanar with the first mounting surface, and a cross-sectional area of the first support members perpendicular to the circumferential direction of the lower chamber gradually decreases or stepwise decreases from end portions to a middle portion of the first support members.

7. The engine block according to claim 4 or 5, wherein the first support members are arranged in pairs, and a number of the pairs of the first support members is equal to a number of the main bearing seats; and / or, the second support members are arranged in pairs, and a number of the pairs of the second support members is equal to a number of the crankshaft support members.

8. The engine block according to claim 4 or 5 or 7, wherein a dimension of the first support members in a radial direction of the crankshaft is greater than or equal to 6 mm, and a dimension of the first support members in the first direction is greater than or equal to 4 mm; and / or, a dimension of the second support members in the radial direction of the crankshaft is greater than or equal to 6 mm, and a dimension of the second support members in the first direction is greater than or equal to 4 mm.

9. The engine block according to claim 4, wherein the inner wall of the lower chamber is further provided with a plurality of pairs of third support members arranged at intervals along a first direction, the number of pairs of third support members being equal to and corresponding one-to-one with the number of main bearing seats, each pair of third support members being arranged at intervals along a second direction, the second direction, the first direction and the depth direction of the lower chamber being perpendicular to each other, at least one of the third support members being provided with a ventilation channel or an oil return channel, the ventilation channel or the oil return channel penetrating the third support member and the lower frame along the depth direction of the lower chamber, and the main bearing seat being embedded between a corresponding pair of third support members.

10. The engine block according to claim 9, wherein the inner wall of the upper chamber is further provided with a plurality of pairs of fourth support members arranged at intervals along a first direction, the number of pairs of fourth support members being equal to and corresponding one-to-one with the number of crankshaft support members, each pair of fourth support members being arranged at intervals along a second direction, the second direction, the first direction, and the depth direction of the upper chamber being perpendicular to each other, at least one of the fourth support members being provided with a ventilation channel or an oil return channel, the ventilation channel or the oil return channel penetrating the fourth support member and the upper frame along the depth direction of the upper chamber, and the crankshaft support member being located between a corresponding pair of fourth support members.

11. The engine block according to claim 10, wherein the dimension of the third support member in the second direction is greater than or equal to 3 mm and less than or equal to 6 mm, and the dimension of the third support member in the first direction is greater than or equal to 4 mm; And / or, the fourth support member has a dimension in the second direction that is greater than or equal to 3 mm and less than or equal to 6 mm, and the fourth support member has a dimension in the first direction that is greater than or equal to 4 mm.

12. The engine block according to claim 10 or 11, wherein the dimension of the third support member at any position in the first direction gradually decreases or decreases in a stepwise manner toward the main bearing seat; And / or, the dimension of any position of the fourth support member in the first direction gradually decreases or decreases stepwise toward the crankshaft support member.

13. The engine block according to any one of claims 10-12, wherein the main bearing housing has protrusions on both sides opposite to each other along the second direction, and the third support member has a groove on the side facing the main bearing housing, the width direction of the groove being consistent with the depth direction of the lower chamber, and the protrusions fitting within the groove; And / or, the side of the main bearing housing opposite to the first direction is provided with weight reduction holes and / or weight reduction grooves.

14. An engine comprising an engine block as described in any one of claims 1-13.

15. A vehicle comprising the engine as claimed in claim 14.

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