Engine and hybrid electric vehicle

Abstract

The invention provides an engine and a hybrid electric vehicle. The engine comprises an air cylinder body, a piston and a piston, the cylinder cover is suitable for sealing the cylinder body; wherein a plurality of cylinder holes are formed in the cylinder block and are suitable for respectively accommodating a plurality of pistons in a sliding manner; the water inlet jacket is formed by sinking downwards from the surface of the cylinder block on one radial side of the plurality of cylinder holes; the water outlet jacket is formed by sinking downwards on the other sides, opposite to the water inlet jacket in the radial direction, of the plurality of cylinder holes; the water inlet water jacket and the water outlet water jacket are communicated through the communication channels located on one side or two sides of each cylinder hole, and the circulation cross-sectional area of the communication channels is smaller than that of the water inlet water jacket or the water outlet water jacket; and cooling liquid from the outside at least partially flows through each communicating channel from the water inlet water jacket to flow into the water outlet water jacket, the pressure difference between the water inlet water jacket and the water outlet water jacket is kept, and heat exchange between the communicating channels and the cylinder holes is enhanced.

Description

Technical Field

[0001] At least one embodiment of the present disclosure relates to the technical field of engine cooling, and more particularly to an engine and a hybrid vehicle. Background Art

[0002] At present, the space for the engine layout of hybrid vehicles is compressed because the generator and hybrid gearbox will occupy part of the space. At the same time, in order to meet driving comfort, more and more car companies hope to compress the engine layout space as much as possible (especially the axial size) to achieve the simultaneous layout of the motor and the engine in the cabin. In summary, the control of the overall length of the engine is becoming more and more stringent, and due to engine performance and reliability, it is difficult to change the cylinder diameter and cylinder center distance, so it is crucial to shorten the length of the engine body by arranging the water jacket.

[0003] The engine cylinder block water jacket exists in the space between the cylinder bore and the outer wall of the cylinder block. Its main function is to cool the cylinder wall during engine operation. It is also responsible for the distribution of coolant throughout the machine.

[0004] The traditional water jacket is a longitudinal flow water jacket with no inter-cylinder holes, resulting in severe inter-cylinder thermal load. As the engine strengthening level continues to increase, the specific torque and explosion pressure continue to increase. In order to cope with the severe inter-cylinder thermal load problem, water holes are machined between the cylinders to solve the problem. However, due to the unclear pressure difference on both sides and insufficient flow, the effect is not obvious. Summary of the invention

[0005] In view of this, the present disclosure provides an engine and a hybrid vehicle, which can shorten the size of a cylinder block.

[0006] As one aspect of the embodiment of the present disclosure, an engine is provided, which includes a cylinder block and a cylinder head. The cylinder head is suitable for sealing the cylinder block. The cylinder block is formed with a plurality of cylinder holes, a water inlet jacket, a water outlet jacket and a plurality of connecting channels. The plurality of cylinder holes are suitable for slidably accommodating a plurality of pistons respectively, the water inlet jacket is formed by being recessed downward from the surface of the cylinder block on one radial side of the plurality of cylinder holes, and the water outlet jacket is formed by being recessed downward on the other side of the plurality of cylinder holes radially opposite to the water inlet jacket. The water inlet jacket and the water outlet jacket are connected through the connecting channel located on one side or both sides of each of the cylinder holes, and the flow cross-sectional area of ​​the connecting channel is smaller than the flow cross-sectional area of ​​the water inlet jacket or the water outlet jacket, so that the cooling liquid from the outside flows from the water inlet jacket at least partially through each of the connecting channels into the water outlet jacket, and the pressure difference between the water inlet jacket and the water outlet jacket is maintained, thereby strengthening the heat exchange between the plurality of connecting channels and the plurality of cylinder holes.

[0007] According to an embodiment of the present disclosure, a cylinder head water jacket is formed on the cylinder head. The water inlet jacket is connected to the cylinder head water jacket, and the coolant at least partially flows into the cylinder head water jacket from the water inlet jacket, and a portion of the coolant flowing into the cylinder head water jacket cools the nose bridge area of ​​the cylinder head and then flows back from the cylinder head to the water outlet of the cylinder body; another portion of the coolant flowing into the cylinder head water jacket cools the exhaust passage or the integrated exhaust manifold on the cylinder head and then flows out from the water outlet.

[0008] According to an embodiment of the present disclosure, each of the above-mentioned connecting channels includes a first channel and a second channel. One end of the above-mentioned first channel is connected to the above-mentioned water inlet jacket. The first end of the above-mentioned second channel is connected to the other end of the above-mentioned first channel, and the second end of the above-mentioned second channel is connected to the above-mentioned water outlet jacket.

[0009] According to an embodiment of the present disclosure, each of the above-mentioned connecting channels also includes a third channel, one end of the above-mentioned third channel is connected to the above-mentioned water inlet jacket, and the other end of the above-mentioned third channel is connected to the first end of the above-mentioned second channel, so that the coolant flowing through the above-mentioned third channel flows into the above-mentioned water outlet jacket through the above-mentioned second channel.

[0010] According to an embodiment of the present disclosure, the relationship between the number m of the communication channels and the number n of the cylinder holes is: m=n, or m=n+1.

[0011] According to an embodiment of the present disclosure, the water inlet of the cylinder body is communicated with one end of the water inlet jacket in the length direction, and the water outlet of the cylinder body is communicated with one end of the water outlet jacket in the length direction.

[0012] According to an embodiment of the present disclosure, the water inlet jacket includes a plurality of sequentially connected connecting grooves, and the cross section of each of the connecting grooves in a reference plane perpendicular to the axial direction of the plurality of cylinder holes is an arc. The water outlet jacket includes a plurality of sequentially connected matching grooves, and the cross section of each of the matching grooves in the reference plane is an arc. Among them, a connecting groove and a matching groove that are opposite to each other are located on both sides of the radial direction of one of the cylinder holes.

[0013] According to an embodiment of the present disclosure, a cross section of each of the above-mentioned connecting grooves and each of the above-mentioned matching grooves in the above-mentioned reference plane is a minor arc.

[0014] According to an embodiment of the present disclosure, the first connecting groove with a water inlet among the plurality of connecting grooves has a major arc cross section in the reference plane, so that the water inlet jacket extends from a side of the cylinder body opposite to the water outlet jacket to a side of the cylinder body that is the same as the water outlet jacket. The water inlet is located at a first end of the first connecting groove, and a second end of the first connecting groove is connected to another connecting groove.

[0015] As another aspect of the embodiments of the present disclosure, a hybrid vehicle is provided, comprising any one of the above-mentioned engines, a water tank and a pump body. The water tank is suitable for containing coolant and cooling the coolant after cooling the above-mentioned engine. The pump body is connected to the above-mentioned water tank and is suitable for pumping the coolant in the above-mentioned water tank to the water inlet jacket of the above-mentioned engine.

[0016] According to the engine of the embodiment of the present disclosure, the water inlet jacket and the water outlet jacket are connected by multiple connecting channels with smaller flow cross-sectional areas, and the water jacket located at at least one end of the engine arrangement direction is removed, which can effectively shorten the size of the cylinder body, making it possible to arrange a large-displacement engine in the engine compartment of a hybrid vehicle. In addition, the coolant from the outside flows from the water inlet jacket at least partially through each connecting channel into the water outlet jacket, and the pressure difference between the water inlet jacket and the water outlet jacket is maintained, which can increase the continuous flow of the coolant near the cylinder hole and maintain a faster flow rate. According to the principle of fluid mechanics, it helps to take away more heat, realize effective cooling between the cylinder holes and the front and rear ends, reduce the temperature between two adjacent cylinder holes, reduce the risk of oil coking on the upper part of the piston, and improve the reliability of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other objects, features and advantages of the present disclosure will become more apparent through the following description of the embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0018] Figure 1 A perspective view of an engine according to an embodiment of the present disclosure is schematically shown;

[0019] Figure 2 A schematic diagram of a simulated morphological stereogram of a water jacket structure according to an embodiment of the present disclosure is shown;

[0020] Figure 3 Schematically shows Figure 2 A schematic diagram of the flow direction of the coolant in the simulated morphological stereogram of the water jacket structure shown;

[0021] Figure 4 A schematic diagram of a simulated morphological stereogram of a water jacket structure according to another embodiment of the present disclosure is shown;

[0022] Figure 5 A schematic diagram of a simulated morphological stereogram of a water jacket structure according to another embodiment of the present disclosure is shown;

[0023] Figure 6 A schematic diagram of a simulated morphological stereogram of a water jacket structure according to another embodiment of the present disclosure is shown;

[0024] Figure 7 A schematic diagram showing a simulated morphological stereogram of a water jacket structure according to another embodiment of the present disclosure; and

[0025] Figure 8 A top view schematically shows a simulated morphology of a water jacket structure according to an embodiment of the present disclosure.

[0026] The following are the descriptions of the reference numerals:

[0027] 1- Cylinder block;

[0028] 11-cylinder hole;

[0029] 12-water inlet jacket;

[0030] 121-water inlet;

[0031] 122-connection slot;

[0032] 123-first connecting slot;

[0033] 13-water outlet jacket;

[0034] 131-water outlet;

[0035] 132-matching groove;

[0036] 14- Communication channel;

[0037] 141-1st channel;

[0038] 142-Second channel;

[0039] 143-Third channel. DETAILED DESCRIPTION

[0040] In order to make the objectives, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0041] The terms used herein are only for describing specific embodiments and are not intended to limit the present disclosure. The terms "comprise", "include", etc. used herein indicate the existence of the features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0042] All terms used herein, including technical and scientific terms, have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification, and should not be interpreted in an idealized or overly rigid manner.

[0043] When using expressions such as "at least one of A, B, and C, etc.", it should generally be interpreted as the meaning of the expression generally understood by those skilled in the art. For example, "a system having at least one of A, B, and C" should include but not be limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc. When using expressions such as "at least one of A, B, or C, etc.", it should generally be interpreted as the meaning of the expression generally understood by those skilled in the art. For example, "a system having at least one of A, B, or C" should include but not be limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.

[0044] It should also be noted that the directional terms mentioned in the embodiments, such as "upper", "lower", "front", "back", "left", "right", etc., are only reference directions of the drawings and are not intended to limit the scope of protection of the present disclosure. Throughout the drawings, the same elements are represented by the same or similar reference numerals. Conventional structures or configurations will be omitted when they may cause confusion in the understanding of the present disclosure.

[0045] Figure 1 A perspective view of an engine according to an embodiment of the present disclosure is schematically shown. Figure 2 A simulated morphological stereogram of a water jacket structure according to an embodiment of the present disclosure is schematically shown.

[0046] As one aspect of the embodiments of the present disclosure, an engine is provided. Figure 1 and Figure 2 As shown, the engine includes a cylinder block 1 and a cylinder head. The cylinder head is suitable for sealing the cylinder block 1. The cylinder block 1 is formed with a plurality of cylinder holes 11, a water inlet jacket 12, a water outlet jacket 13 and a plurality of communication channels 14. The plurality of cylinder holes 11 are suitable for slidably accommodating a plurality of pistons, respectively, the water inlet jacket 12 is formed by being recessed downward from the surface of the cylinder block on one radial side of the plurality of cylinder holes 11, and the water outlet jacket 13 is formed by being recessed downward on the other side of the plurality of cylinder holes 11 which is radially opposite to the water inlet jacket 12. The water inlet jacket 12 and the water outlet jacket 13 are connected via a connecting channel 14 located on one side or both sides of each cylinder bore 11. The flow cross-sectional area of ​​the connecting channel 14 is smaller than the flow cross-sectional area of ​​the water inlet jacket 12 or the water outlet jacket 13, so that the coolant from the outside flows from the water inlet jacket 12 at least partially through each connecting channel 14 into the water outlet jacket 13, and the pressure difference between the water inlet jacket 12 and the water outlet jacket 13 is maintained, thereby enhancing the heat exchange between the multiple connecting channels 14 and the multiple cylinder bores 11.

[0047] According to the engine of the embodiment of the present disclosure, the water inlet jacket 12 and the water outlet jacket 13 are connected only by a plurality of connecting passages 14 with a small flow cross-sectional area, and the water jacket located at at least one end of the engine arrangement direction is omitted. Specifically, in the engine arrangement direction (for example Figure 2-Figure 7 at least one end (eg Figure 2 , Figure 3 and Figure 5 The right end shown Figure 4 The left end shown, Figure 6 and Figure 7 In the cylinder bores (left and right ends shown in the figure), since there is no water jacket below the communication channel 14, the wall thickness of the cylinder bore at the communication channel 14 (the upper part of the cylinder bore) is greater than the wall thickness below the communication channel 14 (the lower part of the cylinder bore). In this way, the size of the cylinder body can be effectively shortened, making it possible to arrange a large-displacement engine in the engine compartment of a hybrid vehicle. In addition, the coolant from the outside flows from the water inlet jacket 12 at least partially through each communication channel 14 into the water outlet jacket 13, and the pressure difference between the water inlet jacket 12 and the water outlet jacket 13 is maintained, which can increase the continuous flow of the coolant near the cylinder bore 11 and maintain it at a faster flow rate. According to the principle of fluid mechanics, it helps to take away more heat, realize effective cooling between the cylinder bores 11 and the front and rear ends, reduce the temperature between two adjacent cylinder bores, reduce the risk of oil coking on the upper part of the piston, and improve the reliability of the engine.

[0048] According to an embodiment of the present disclosure, the pressure of the coolant in the water inlet jacket 12 is higher than the pressure of the coolant in the water outlet jacket 13 .

[0049] According to an embodiment of the present disclosure, the cooling liquid may include cooling water or a liquid mixed with other materials. For example, the other materials may include a mixture of any one or more of ethylene glycol, propylene glycol, corrosion inhibitors, etc.

[0050] According to an embodiment of the present disclosure, the plurality of cylinder holes 11 may be arranged in a straight line, in a V-shaped arrangement, or in a W-shaped arrangement in a cross section within a plane perpendicular to the axial direction.

[0051] In an illustrative embodiment, the communication channel 14 is formed on a side of the water inlet jacket 12 and the water outlet jacket 13 close to the cylinder head.

[0052] In an illustrative embodiment, the number of cylinder holes 11 may be 3, 4, 6, 8 or 12.

[0053] Figure 3 Schematically shows Figure 2 A schematic diagram of the flow direction of the coolant in the simulated morphological stereogram of the water jacket structure shown.

[0054] According to an embodiment of the present disclosure, a cylinder head water jacket is formed on the cylinder head. The water inlet jacket 12 is connected to the cylinder head water jacket, such as Figure 3 As shown, the coolant flows from the water inlet jacket 12 from one end to the other end, and a part of the coolant flows through each communication channel 14 into the water outlet jacket 13, and the coolant flowing into the water outlet jacket 13 flows back to the water outlet of the cylinder block 1. The other part of the coolant flows through the channel between the cylinder block 1 and the cylinder head and flows into the cylinder head water jacket (such as Figure 3 In the perspective shown, multiple arrows pointing upward from the water inlet cylinder liner) are used to cool the nose bridge area and other key parts of the cylinder head, and then return from the cylinder head to the water outlet of the cylinder block 1 (as shown in FIG. Figure 3 In the perspective shown, there are multiple arrows pointing downward to the water outlet cylinder jacket); the coolant flowing into the cylinder head water jacket can flow out from the water outlet of the cylinder block 1 after being completely cooled, or it can be divided into two parts, one part returns to the water outlet of the cylinder block 1 after cooling the nose bridge area of ​​the cylinder head, and the other part flows out from the water outlet on the cylinder head after cooling the exhaust duct or integrated exhaust manifold on the cylinder head. In other words, the coolant flowing into the cylinder head can flow in multiple ways, among which at least a part of the coolant can flow back from the cylinder head to the water outlet of the cylinder block.

[0055] In an illustrative embodiment, the coolant flowing into the cylinder head water jacket can flow back to the water outlet jacket 13 , converge with the cold zone liquid in the water outlet jacket 13 in the water outlet jacket 13 , and then flow out from the water outlet of the cylinder body 1 .

[0056] According to the embodiment of the present disclosure, the water inlet jacket 12 is responsible for cooling the water inlet side of the cylinder block 1 and is the source channel of the cylinder head coolant. The water outlet jacket 13 is connected to the water outlet of the cylinder block 1, is responsible for the main cooling of the water outlet side of the cylinder block 1, and is the water outlet channel of the cylinder head coolant. The water inlet jacket 12 and the water outlet jacket 13 are connected through the connecting channel 14 to ensure the pressure difference between the water inlet jacket 12 and the water outlet jacket 13, and the flow field speed is fast, which ensures the cooling between the cylinders.

[0057] In such an embodiment, the flow of the coolant is reasonably distributed and organized to prevent the engine from overheating. Since each cylinder bore 11 is at least partially flowed by the coolant, a more uniform cooling effect is achieved, thermal stress is reduced, and the service life of the engine components is extended.

[0058] In an illustrative embodiment, the coolant is pumped in from the water inlet of the cylinder block 1, passes through the water inlet jacket 12 located on one radial side of the plurality of cylinder holes 11, and flows from the first cylinder to the fourth cylinder in sequence according to the flow direction of the coolant in the water inlet jacket 12, and at the same time flows from the cylinder block 1 to the cylinder head water jacket in the cylinder head, and after being cooled in the nose bridge area of ​​the cylinder head, a portion of the coolant flows to the other side of the cylinder block 1, and the other portion continues to cool the exhaust duct or the integrated exhaust manifold and then converges at the water outlet of the cylinder block 1. In addition, the coolant in the water inlet jacket 12 flows from the connecting channel 14 to the water outlet jacket 13, and finally all the coolant flows out from the water outlet of the cylinder block 1 and enters the radiator or water tank.

[0059] According to the embodiments of the present disclosure, Figure 2 and Figure 3 As shown, each communication channel 14 includes a first channel 141 and a second channel 142. One end of the first channel 141 communicates with the inlet jacket 12, a first end of the second channel 142 communicates with the other end of the first channel 141, and a second end of the second channel 142 communicates with the outlet jacket 13.

[0060] In such an embodiment, Figure 2 and Figure 3 As shown, the first channel 141 and the second channel 142 may be in a zigzag shape.

[0061] In an illustrative embodiment, Figure 2 and Figure 3 As shown, the plane or curved surface formed by the axes of the multiple cylinder holes divides the cylinder body into a first side and a second side opposite to the first side. The water inlet 121 of the water inlet jacket 12 and the water outlet 131 of the water outlet jacket 13 can both be located on the first side or the second side of the cylinder body. Further, the water inlet 121 of the water inlet jacket 12 and the water outlet 131 of the water outlet jacket 13 are both formed at the same end of the arrangement direction of the multiple cylinder holes 11.

[0062] like Figure 2 and Figure 3 As shown, the water inlet 121 of the water inlet jacket 12 and the water outlet 131 of the water outlet jacket 13 are both formed at the first end of the arrangement direction of the plurality of cylinder holes.

[0063] Figure 4 A simulated morphological stereoscopic diagram of a water jacket structure according to another embodiment of the present disclosure is schematically shown.

[0064] like Figure 4 As shown, Figure 4 and Figure 2 The difference is that the water inlet 121 of the water inlet jacket 12 and the water outlet 131 of the water outlet jacket 13 are both formed at the second end opposite to the first end in the arrangement direction of the plurality of cylinder holes. Figure 2 The structure is the same as in and will not be repeated here.

[0065] Figure 5 A simulated morphological stereogram of a water jacket structure according to yet another embodiment of the present disclosure is schematically shown.

[0066] like Figure 5 As shown, Figure 5 and Figure 2 The difference is that the water inlet 121 of the water inlet jacket 12 and the water outlet 131 of the water outlet jacket 13 are respectively formed at the two ends of the arrangement direction of the multiple cylinder holes. That is, the water inlet is formed at the first end of the arrangement direction of the multiple cylinder holes, and the water outlet is formed at the second end of the arrangement direction of the multiple cylinder holes. Figure 2 The structure is the same as in and will not be repeated here.

[0067] Figure 6 A simulated morphological stereogram of a water jacket structure according to yet another embodiment of the present disclosure is schematically shown.

[0068] According to the embodiments of the present disclosure, Figure 6 and Figure 7 As shown, each communication channel 14 further includes a third channel 143, one end of the third channel 143 is communicated with the water inlet jacket 12, and the other end of the third channel 143 is communicated with the first end of the second channel 142, so that the coolant flowing through the third channel 143 flows into the water outlet jacket 13 through the second channel 142. It can be understood that in Figures 2 to 5 The simulated morphological diagram of the water jacket structure shown may also include a third channel.

[0069] In such an embodiment, by providing a plurality of channels extending from the water inlet jacket, the coolant flowing in from the first channel and the third channel converges in the third channel, thereby increasing the flow rate of the coolant in the connecting channel and improving the heat exchange efficiency.

[0070] In an illustrative embodiment, Figure 6 As shown, the water inlet 121 of the water inlet jacket 12 and the water outlet 131 of the water outlet jacket 13 are located at the first side and the second side of the cylinder body, respectively.

[0071] Further, such as Figure 6 As shown, the water inlet 121 of the water inlet jacket 12 is formed at one end of the arrangement direction of the plurality of cylinder holes 11 , and the water outlet 131 of the water outlet jacket 13 may be formed at the other end of the arrangement direction of the plurality of cylinder holes 11 .

[0072] Figure 7 A simulated morphological stereogram of a water jacket structure according to another embodiment of the present disclosure is schematically shown.

[0073] like Figure 7As shown, the water inlet 121 of the water inlet jacket 12 and the water outlet 131 of the water outlet jacket 13 may be located at the same end of the arrangement direction of the plurality of cylinder holes 11 .

[0074] According to the embodiments of the present disclosure, Figures 2 to 7 As shown, the water inlet of the cylinder body 1 is communicated with one end of the water inlet jacket 12 in the length direction, and the water outlet of the cylinder body 1 is communicated with one end of the water outlet jacket 13 in the length direction.

[0075] In such an embodiment, since the water inlet is connected to one end of the water inlet jacket 12 in the length direction, and the water outlet is connected to one end of the water outlet jacket 13 in the length direction, the coolant can flow along the length direction of the water inlet jacket 12 and the water outlet jacket 13, ensuring that there is no dead zone of flow inside the water inlet jacket 12 and the water outlet jacket 13, avoiding local overheating and achieving a more uniform cooling effect.

[0076] According to the embodiments of the present disclosure, Figures 2 to 7 As shown, the water inlet jacket 12 includes a plurality of sequentially connected connecting grooves 122, and the cross section of each connecting groove 122 in a reference plane perpendicular to the axial direction of the plurality of cylinder holes 11 is arc-shaped. The water outlet jacket 13 includes a plurality of sequentially connected matching grooves 132, and the cross section of each matching groove 132 in the reference plane is arc-shaped. Among them, a connecting groove 122 and a matching groove 132 that are opposite to each other are located on both sides of the radial direction of a cylinder hole 11.

[0077] According to an embodiment of the present disclosure, two adjacent connecting grooves 122 are smoothly connected to reduce the resistance of the coolant flowing in the water inlet jacket 12 .

[0078] According to the embodiment of the present disclosure, two adjacent matching grooves 132 are smoothly connected to reduce the resistance of the coolant flowing in the water outlet jacket 13 .

[0079] In such an embodiment, the water inlet 121 of the water inlet jacket 12 is formed at one end in the length direction of the plurality of connecting grooves 122. The water outlet 131 of the water outlet jacket 13 is disposed at one end in the length direction of the plurality of matching grooves 132.

[0080] In an illustrative embodiment, Figure 6 and Figure 7 As shown, the relationship between the number m of the communication passages 14 and the number n of the cylinder holes 11 is m=n+1.

[0081] In such an embodiment, the cross-sections of each connecting groove 122 and each matching groove 132 in a reference plane perpendicular to the axial direction of the plurality of cylinder holes 11 are both minor arcs.

[0082] In an illustrative embodiment, Figure 6 and Figure 7As shown, the number of the communication channels 14 is five, and the number of the cylinder holes 11 is four.

[0083] In such an embodiment, the water inlet 121 of the water inlet jacket 12 and the water outlet 131 of the water outlet jacket 13 may be formed on the first side and the second side of the plurality of cylinder holes 11 , respectively.

[0084] In an illustrative embodiment, Figure 6 As shown, the water inlet 121 of the water inlet jacket 12 is formed at one end of the arrangement direction of the plurality of cylinder holes 11 , and the water outlet 131 of the water outlet jacket 13 may be formed at the other end of the arrangement direction of the plurality of cylinder holes 11 .

[0085] In an alternative embodiment, Figure 7 As shown, the water inlet 121 of the water inlet jacket 12 and the water outlet 131 of the water outlet jacket 13 are both formed at the same end of the arrangement direction of the plurality of cylinder holes 11 .

[0086] In an alternative embodiment, the relationship between the number m of the communication channels 14 and the number n of the cylinder holes 11 is m=n.

[0087] In such an embodiment, the first connection groove 123 having the water inlet 121 among the plurality of connection grooves 122 has a major arc in cross section in a reference plane perpendicular to the axial direction of the plurality of cylinder holes 11, so that the water inlet jacket 12 extends from the side of the cylinder body 1 opposite to the water outlet jacket 13 to the same side as the water outlet jacket 13. The water inlet 121 is located at a first end of the first connection groove 123, the second end of the first connection groove 123 is connected to another connection groove 122, and the water inlet 121 is connected to the water inlet of the cylinder body 1.

[0088] In an illustrative embodiment, Figures 2 to 5 As shown, the number of the communication channels 14 is four, and the number of the cylinder holes 11 is four.

[0089] In such an embodiment, the connection part of the water inlet side and the water outlet side in the water jacket structure in the conventional technology is replaced by a plurality of communication channels 14. Since the flow cross-sectional area of ​​the communication channels 14 is much smaller than the flow cross-sectional area of ​​the water inlet jacket 12 and / or the water outlet jacket 13, the space used for the cooling system in the cylinder block 1 can be reduced while maintaining a cooling effect similar to that of the conventional water jacket, and the size of the cylinder block 1 can be reduced, thereby making the entire engine more compact. Furthermore, the reduction in the size of the cylinder block 1 can reduce the weight of the engine, which helps to improve fuel efficiency and vehicle performance.

[0090] According to the engine of the embodiment of the present disclosure, the water jacket connection structure of the engine cylinder block 1 is changed to a form of multiple connecting channels 14 to reduce and balance the thermal load of the entire engine body, thereby reducing the size of the cylinder block 1. At the same time, the design of the multiple connecting channels 14 can not only meet the heat exchange requirements of the cylinder block 1, but also prevent the cylinder block 1 from overcooling, thereby improving fuel economy.

[0091] Figure 8 The schematic diagram shows a simulated top view of a water jacket structure according to an embodiment of the present disclosure. It should be noted that: Figure 8 The water inlet and outlet are not shown.

[0092] like Figure 8 As shown, point O is the center of the cylinder hole. In a reference plane perpendicular to the axis of the cylinder hole, the distance between the water inlet jacket 12 and the water outlet jacket 13 is the projection length of the communication channel 14 in the reference plane.

[0093] Further, such as Figure 8 As shown, the projected length of the connecting channel is also the chord length of the gap between the inlet water jacket and the outlet water jacket through the connecting channel 14 to achieve the connection between the inlet water jacket and the outlet water jacket. The projected length of each connecting channel is roughly equal to the projected length of other connecting channels. The arc center angle corresponding to the projected length is ∠α, where 45°≤α≤90°. For example, α can be any one of 45°, 60°, 65°, 75° and 90°.

[0094] As another aspect of the embodiments of the present disclosure, a hybrid vehicle is provided, which comprises any one of the above-mentioned engines, a water tank and a pump body. The water tank is suitable for containing coolant and cooling the coolant after cooling the engine. The pump body is connected to the water tank and is suitable for pumping the coolant in the water tank to the water inlet jacket 12 of the engine.

[0095] In an illustrative embodiment, a water pump extracts coolant from a water tank and delivers the coolant to the water inlet jacket 12 of the engine. Under the restriction of the water inlet jacket 12, multiple connecting channels 14 and the water outlet jacket 13, a portion of the coolant flows around each cylinder hole 11, absorbing the heat of the cylinder wall and the piston. After the coolant flows in the water inlet jacket 12 of the cylinder block 1, another portion of the coolant flows to the cylinder head water jacket through the channel between the cylinder block 1 and the cylinder head. In the water jacket of the cylinder head, the coolant will flow through the top of the combustion chamber, absorbing the heat of the spark plug, valve and combustion chamber. After the coolant flows out of the cylinder head water jacket, it converges with the coolant in the water outlet jacket 13 of the cylinder block 1 and flows out from the water outlet of the cylinder block 1. After the heat is dissipated by the radiator, it is pumped back to the tank by the water pump again to continue to participate in the circulation.

[0096] The embodiments of the present disclosure are described above. However, these embodiments are only for the purpose of illustration and are not intended to limit the scope of the present disclosure. Although the embodiments are described above separately, this does not mean that the measures in the various embodiments cannot be used in combination to advantage. The scope of the present disclosure is defined by the attached claims and their equivalents. Without departing from the scope of the present disclosure, those skilled in the art may make various substitutions and modifications, which should all fall within the scope of the present disclosure.

Claims

1. An engine, characterized in that: include: Cylinder block; a cylinder head adapted to seal the cylinder body; Wherein, the cylinder body is formed with: a plurality of cylinder bores adapted to respectively and slidably accommodate a plurality of pistons; A water inlet jacket is formed by being recessed downward from the surface of the cylinder body on one side of the plurality of cylinder holes in a radial direction; A water outlet water jacket is formed by being recessed downwards on the other side of the plurality of cylinder holes which is radially opposite to the water inlet water jacket; and A plurality of communication channels, wherein the water inlet jacket and the water outlet jacket are communicated with each other through the communication channels located on one side or both sides of each of the cylinder holes, and the flow cross-sectional area of ​​the communication channels is smaller than the flow cross-sectional area of ​​the water inlet jacket or the water outlet jacket, so that the coolant from the outside flows from the water inlet jacket at least partially through each of the communication channels into the water outlet jacket, and the pressure difference between the water inlet jacket and the water outlet jacket is maintained, thereby strengthening the heat exchange between the plurality of communication channels and the plurality of cylinder holes.

2. The engine according to claim 1, characterized in that A cylinder head water jacket is formed on the cylinder head; The water inlet jacket is in communication with the cylinder head jacket, the coolant at least partially flows from the water inlet jacket into the cylinder head jacket, and a portion of the coolant flowing into the cylinder head jacket cools the nose bridge area of ​​the cylinder head and then flows back from the cylinder head to the water outlet of the cylinder body; Another portion of the coolant flowing into the cylinder head water jacket cools the exhaust passage or the integrated exhaust manifold on the cylinder head and then flows out from the water outlet.

3. The engine according to claim 1, characterized in that Each of the communication channels comprises: a first channel, one end of which is in communication with the water inlet jacket; and A second channel, wherein a first end of the second channel is communicated with the other end of the first channel, and a second end of the second channel is communicated with the water outlet jacket.

4. The engine according to claim 3, characterized in that Each of the communication channels further comprises: A third channel, one end of the third channel is communicated with the water inlet jacket, and the other end of the third channel is communicated with the first end of the second channel, so that the coolant flowing through the third channel flows into the water outlet jacket through the second channel.

5. The engine according to any one of claims 1 to 4, characterized in that: The relationship between the number m of the communication channels and the number n of the cylinder holes is: m=n, or m=n+1.

6. The engine according to any one of claims 1 to 4, characterized in that: The water inlet of the cylinder body is connected to one end of the water inlet jacket in the length direction; The water outlet of the cylinder body is communicated with one end of the water outlet jacket in the length direction.

7. The engine according to any one of claims 1 to 4, characterized in that: The water inlet jacket comprises: a plurality of connecting grooves which are connected in sequence, and a cross section of each of the connecting grooves in a reference plane perpendicular to the axial direction of the plurality of cylinder holes is an arc; The outlet water jacket comprises: a plurality of matching grooves connected in sequence, and the cross section of each matching groove in the reference plane is an arc; Wherein, a connecting groove and a matching groove which are opposite to each other are located on two sides of a cylinder hole in a radial direction.

8. The engine according to claim 7, characterized in that The cross-sections of each of the connecting grooves and each of the matching grooves in the reference plane are minor arcs.

9. The engine according to claim 7, characterized in that A first connecting groove having a water inlet among the plurality of connecting grooves has a major arc cross section in the reference plane, so that the water inlet jacket extends from a side of the cylinder body opposite to the water outlet jacket to a side on the same side as the water outlet jacket; Wherein, the water inlet is located at a first end of the first connecting groove, and a second end of the first connecting groove is connected to another connecting groove.

10. A hybrid vehicle, characterized in that: include: The engine according to any one of claims 1 to 9; a water tank, adapted to contain coolant and cool the coolant after cooling the engine; and The pump body is communicated with the water tank and is suitable for pumping the coolant in the water tank to the water inlet jacket of the engine.

Images