Engine and hybrid electric vehicle

Abstract

The utility model provides an engine and a hybrid electric vehicle. The engine comprises an air cylinder body, a piston and a piston rod, 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 this utility model relates to the field of engine cooling technology, and more particularly to an engine and a hybrid vehicle. Background Technology

[0002] Currently, hybrid vehicles have limited space due to the alternator and hybrid transmission taking up space, resulting in reduced engine placement space. Simultaneously, to improve driving comfort, more and more automakers are aiming to minimize engine placement space (especially axial dimensions) to allow the electric motor and engine to be housed simultaneously within the engine compartment. Considering these two factors, the control over the overall engine length is becoming increasingly stringent. Furthermore, due to engine performance and reliability considerations, changes to cylinder bore and cylinder center distance are difficult to make. Therefore, using water jackets to shorten the engine block length is crucial.

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

[0004] Traditional water jackets are longitudinal flow water jackets with no inter-cylinder holes, resulting in severe inter-cylinder heat load. As engine performance continues to improve, torque and pressure increase. To address the severe inter-cylinder heat load problem, machining water holes is used in the inter-cylinder space. However, due to the insignificant pressure difference between the two sides and insufficient flow, the effect is not obvious. Utility Model Content

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

[0006] As one aspect of this utility model, an engine is provided, comprising a cylinder block and a cylinder head. The cylinder head is adapted to seal the cylinder block. The cylinder block has a plurality of cylinder bores, an inlet water jacket, an outlet water jacket, and a plurality of communicating channels. The plurality of cylinder bores are adapted to slidably accommodate a plurality of pistons. The inlet water jacket is formed recessed downward from the surface of the cylinder block on one radial side of the plurality of cylinder bores, and the outlet water jacket is formed recessed downward on the other radial side of the plurality of cylinder bores opposite to the inlet water jacket. The inlet water jacket and the outlet water jacket are connected by the communicating channels located on one or both sides of each of the cylinder bores. The flow cross-sectional area of ​​the communicating channels is smaller than the flow cross-sectional area of ​​the inlet water jacket or the outlet water jacket, such that coolant from the outside flows at least partially from the inlet water jacket through each communicating channel into the outlet water jacket, maintaining the pressure difference between the inlet water jacket and the outlet water jacket, and enhancing heat exchange between the plurality of communicating channels and the plurality of cylinder bores.

[0007] According to an embodiment of the present invention, a cylinder head water jacket is formed on the cylinder head. The inlet water jacket is in communication with the cylinder head water jacket, and the coolant flows at least partially from the inlet water jacket into the cylinder head water jacket. A portion of the coolant flowing into the cylinder head water jacket cools the nose area of ​​the cylinder head and then flows back from the cylinder head to the outlet of the cylinder block. The other portion of the coolant flowing into the cylinder head water jacket cools the exhaust passage or integrated exhaust manifold on the cylinder head and then flows out from the outlet.

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

[0009] According to an embodiment of the present invention, each of the above-mentioned connecting channels further includes a third channel, one end of which is connected to the above-mentioned inlet water jacket, and the other end of which 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 outlet water jacket through the above-mentioned second channel.

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

[0011] According to an embodiment of this utility model, the water inlet of the cylinder body is connected to one end of the water inlet jacket along its length. The water outlet of the cylinder body is connected to one end of the water outlet jacket along its length.

[0012] According to an embodiment of this utility model, the inlet water jacket includes a plurality of sequentially penetrating connecting grooves, and the cross-section of each connecting groove in a reference plane perpendicular to the axial direction of the plurality of cylinder bores is arc-shaped. The outlet water jacket includes a plurality of sequentially connected mating grooves, and the cross-section of each mating groove in the reference plane is arc-shaped. A connecting groove and a mating groove opposite to each other are located on opposite radial sides of one of the cylinder bores.

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

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

[0015] As another aspect of this utility model, a hybrid electric vehicle is provided, comprising any of the aforementioned engine, water tank, and pump body. The water tank is suitable for holding coolant and for cooling the coolant after it has cooled 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 jacket of the engine.

[0016] According to the engine of this embodiment, the inlet and outlet water jackets are connected by multiple connecting channels with small cross-sectional areas, eliminating the need for a water jacket located at at least one end in the engine's orientation. This effectively shortens the cylinder block size, making it possible to arrange a large-displacement engine in the engine compartment of a hybrid vehicle. Furthermore, by allowing external coolant to flow at least partially from the inlet water jacket through each connecting channel into the outlet water jacket, and maintaining the pressure difference between the inlet and outlet water jackets, the continuous flow of coolant near the cylinder bores is increased and maintained at a relatively high flow rate. According to fluid dynamics principles, this helps to remove more heat, effectively cooling the cylinder bores and the front and rear ends, reducing the temperature between adjacent cylinder bores, decreasing the risk of oil coking on the piston top, and improving engine reliability. Attached Figure Description

[0017] The above and other objects, features and advantages of the present invention will become clearer from the following description of embodiments of the present invention with reference to the accompanying drawings, in which:

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

[0019] Figure 2 A schematic perspective view of a simulated form of a water jacket structure according to an embodiment of the present invention is shown;

[0020] Figure 3 Schematic illustration Figure 2 A schematic diagram of the coolant flow direction in a three-dimensional simulation of the water jacket structure shown;

[0021] Figure 4 A schematic perspective view of a simulated form of a water jacket structure according to another embodiment of the present invention is shown;

[0022] Figure 5 A schematic perspective view of a simulated form of a water jacket structure according to another embodiment of the present invention is shown;

[0023] Figure 6 A schematic perspective view of a simulated form of a water jacket structure according to another embodiment of the present invention is shown.

[0024] Figure 7A schematic perspective view of a simulated form of a water jacket structure according to another embodiment of the present invention is shown; and

[0025] Figure 8 A schematic top view of a simulated form of a water jacket structure according to an embodiment of the present invention is shown.

[0026] The annotations in the attached figures are explained as follows:

[0027] 1-Cylinder block;

[0028] 11-Cylinder bore;

[0029] 12-Inlet water jacket;

[0030] 121 - Inlet;

[0031] 122 - Connecting slot;

[0032] 123 - First connecting slot;

[0033] 13-Outlet water jacket;

[0034] 131 - Outlet;

[0035] 132 - Mating groove;

[0036] 14 - Connecting channels;

[0037] 141 - First Channel;

[0038] 142 - Second Channel;

[0039] 143 - Third Channel. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0041] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence 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 are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0043] When using expressions such as "at least one of A, B, and C," the meaning should generally be interpreted according to the understanding of someone skilled in the art. For example, "a system having at least one of A, B, and C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or having A, B, and C. Similarly, when using expressions such as "at least one of A, B, or C," the meaning should generally be interpreted according to the understanding of someone skilled in the art. For example, "a system having at least one of A, B, or C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or having A, B, and C.

[0044] It should also be noted that the directional terms mentioned in the embodiments, such as "up," "down," "front," "back," "left," and "right," are only for reference to the directions in the accompanying drawings and are not intended to limit the scope of protection of this utility model. Throughout the drawings, the same elements are represented by the same or similar reference numerals. Conventional structures or constructions will be omitted where they may cause confusion in understanding this utility model.

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

[0046] As one aspect of this utility model, an engine is provided. For example... Figure 1 and Figure 2 As shown, the engine includes a cylinder block 1 and a cylinder head. The cylinder head is used to seal the cylinder block 1. The cylinder block 1 has multiple cylinder bores 11, an inlet water jacket 12, an outlet water jacket 13, and multiple communicating channels 14 formed thereon. The multiple cylinder bores 11 are adapted to slidably accommodate multiple pistons respectively. The inlet water jacket 12 is formed by a downward recess from the surface of the cylinder block on one radial side of the multiple cylinder bores 11, and the outlet water jacket 13 is formed by a downward recess on the other radial side of the multiple cylinder bores 11 opposite to the inlet water jacket 12. The inlet water jacket 12 and the outlet water jacket 13 are connected by a connecting channel 14 located on one or both sides of each cylinder bore 11. The flow cross-sectional area of ​​the connecting channel 14 is smaller than that of the inlet water jacket 12 or the outlet water jacket 13, so that the coolant from the outside flows at least partially from the inlet water jacket 12 through each connecting channel 14 into the outlet water jacket 13, and maintains the pressure difference between the inlet water jacket 12 and the outlet water jacket 13, thereby enhancing the heat exchange between the multiple connecting channels 14 and the multiple cylinder bores 11.

[0047] According to the engine of this utility model embodiment, the inlet water jacket 12 and the outlet water jacket 13 are connected only by a plurality of connecting channels 14 with a small cross-sectional area, omitting the water jacket located at least one end in the engine arrangement direction. Specifically, in the engine arrangement direction (e.g., ...), the water jacket located at at least one end of the engine arrangement direction is omitted. Figures 2-7 At least one end (e.g., the left and right directions shown) 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 shown on the left and right ends, since there is no water jacket below the connecting channel 14, the wall thickness of the cylinder bore at the connecting channel 14 (the upper part of the cylinder bore) is greater than the wall thickness below the connecting channel 14 (the lower part of the cylinder bore). This effectively shortens the cylinder block size, making it possible to arrange a large-displacement engine in the engine compartment of a hybrid vehicle. Furthermore, by ensuring that external coolant flows at least partially from the inlet water jacket 12 through each connecting channel 14 into the outlet water jacket 13, and maintaining the pressure difference between the inlet water jacket 12 and the outlet water jacket 13, the continuous flow of coolant near the cylinder bore 11 is increased and maintained at a relatively fast flow rate. According to fluid dynamics principles, this helps to remove more heat, effectively cooling the cylinder bores 11 and their front and rear ends, reducing the temperature between adjacent cylinder bores, decreasing the risk of oil coking on the piston, and improving engine reliability.

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

[0049] According to embodiments of this invention, the coolant may include cooling water or a liquid doped with other materials. For example, the other materials may include any one or a mixture of ethylene glycol, propylene glycol, corrosion inhibitors, etc.

[0050] According to embodiments of the present invention, the cross-sections of the plurality of cylinder bores 11 in a plane perpendicular to the axial direction can be arranged in a straight line, a V-shape, or a W-shape.

[0051] In one illustrative embodiment, a connecting channel 14 is formed on the side of the inlet water jacket 12 and the outlet water jacket 13 near the cylinder head.

[0052] In one illustrative embodiment, the number of cylinder bores 11 can be 3, 4, 6, 8, or 12.

[0053] Figure 3 Schematic illustration Figure 2 The diagram shows a schematic representation of the coolant flow direction in a three-dimensional simulation of the water jacket structure.

[0054] According to an embodiment of this utility model, a cylinder head water jacket is formed on the cylinder head. The water inlet jacket 12 communicates with the cylinder head water jacket, such as... Figure 3 As shown, coolant flows from one end of the inlet water jacket 12 to the other. A portion of the coolant flows through each connecting channel 14 into the outlet water jacket 13, and the coolant in the outlet water jacket 13 flows back to the outlet of the cylinder block 1. The other portion of the coolant flows through the channel between the cylinder block 1 and the cylinder head into the cylinder head water jacket (e.g.,...). Figure 3 In the view shown, multiple arrows pointing upwards from the inlet cylinder liner indicate that a portion of the coolant flowing into the cylinder head water jacket cools the nose area of ​​the cylinder head and other critical components, before flowing back from the cylinder head to the outlet of cylinder block 1 (e.g., Figure 3 (As shown in the perspective, multiple downward-pointing arrows indicate the outlet of the cylinder head water jacket). The coolant flowing into the cylinder head water jacket can either be completely cooled and then flow out from the outlet of cylinder block 1, or it can be divided into two parts: one part cools the nose area of ​​the cylinder head and returns to the outlet of cylinder block 1, while the other part cools the exhaust passages or integrated exhaust manifold on the cylinder head and then flows out from the outlet on the cylinder head. In other words, the coolant flowing into the cylinder head can have multiple flow patterns, and at least a portion of the coolant can flow back from the cylinder head to the outlet of the cylinder block.

[0055] In one illustrative embodiment, the coolant flowing into the cylinder head water jacket can flow back to the outlet water jacket 13, where it converges with the coolant in the outlet water jacket 13 and then flows out from the outlet of the cylinder block 1.

[0056] According to an embodiment of this utility model, the inlet water jacket 12 is responsible for cooling the inlet side of the cylinder block 1 and serves as the source channel for the cylinder head coolant. The outlet water jacket 13 is connected to the outlet of the cylinder block 1, responsible for the main cooling of the outlet side of the cylinder block 1 and serves as the outlet channel for the cylinder head coolant. The inlet water jacket 12 and the outlet water jacket 13 are connected by a connecting channel 14, ensuring a pressure difference between the inlet water jacket 12 and the outlet water jacket 13, resulting in a fast flow velocity and ensuring inter-cylinder cooling.

[0057] In this embodiment, engine overheating is prevented by rationally distributing and organizing the flow of coolant. Since each cylinder bore 11 is at least partially traversed by coolant, a more uniform cooling effect is achieved, reducing thermal stress and extending the service life of engine components.

[0058] In one illustrative embodiment, coolant is pumped into the cylinder block 1 through the inlet port, flows through the inlet water jacket 12 located radially on one side of the plurality of cylinder bores 11, and flows sequentially from the first cylinder to the fourth cylinder according to the flow direction of the coolant within the inlet water jacket 12. Simultaneously, it flows from the cylinder block 1 to the cylinder head water jacket within the cylinder head. After being cooled in the nose area of ​​the cylinder head, a portion of the coolant flows to the other side of the cylinder block 1, while the remaining portion continues to cool the exhaust passages or integrated exhaust manifold before converging at the outlet port of the cylinder block 1. Furthermore, the coolant within the inlet water jacket 12 flows through the connecting channel 14 to the outlet water jacket 13, and finally, all the coolant flows out from the outlet port of the cylinder block 1, entering the radiator or water tank.

[0059] According to embodiments of the present invention, such as Figure 2 and Figure 3 As shown, each connecting channel 14 includes a first channel 141 and a second channel 142. One end of the first channel 141 is connected to the inlet water jacket 12, the first end of the second channel 142 is connected to the other end of the first channel 141, and the second end of the second channel 142 is connected to the outlet water jacket 13.

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

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

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

[0063] Figure 4 A schematic perspective view of a simulated form of a water jacket structure according to another embodiment of the present invention is shown.

[0064] like Figure 4 As shown, Figure 4 and Figure 2 The difference lies in that the inlet 121 of the inlet water jacket 12 and the outlet 131 of the outlet water jacket 13 are both formed at the second end opposite to the first end in the arrangement direction of the multiple cylinder holes. Other structures are the same as... Figure 2 The structure is consistent with that in the text, so I will not repeat it here.

[0065] Figure 5 A schematic perspective view of a simulated form of a water jacket structure according to another embodiment of the present invention is shown.

[0066] like Figure 5 As shown, Figure 5 and Figure 2 The difference lies in that the inlet 121 of the inlet water jacket 12 and the outlet 131 of the outlet water jacket 13 are formed at both ends of the multiple cylinder bore arrangement direction, respectively. That is, the inlet is formed at the first end of the multiple cylinder bore arrangement direction, and the outlet is formed at the second end. Other structures are the same as... Figure 2 The structure is consistent with that in the text, so I will not repeat it here.

[0067] Figure 6 A schematic perspective view of a simulated form of a water jacket structure according to another embodiment of the present invention is shown.

[0068] According to embodiments of the present invention, such as Figure 6 and Figure 7 As shown, each connecting channel 14 also includes a third channel 143. One end of the third channel 143 is connected to the inlet water jacket 12, and the other end of the third channel 143 is connected to the first end of the second channel 142, so that the coolant flowing through the third channel 143 flows into the outlet water jacket 13 through the second channel 142. It is understood that in Figures 2 to 5 The simulated morphology diagram of the water jacket structure shown may also include a third channel.

[0069] In such an embodiment, by setting multiple 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 thus improving the heat exchange efficiency.

[0070] In one illustrative embodiment, such as Figure 6 As shown, the inlet 121 of the inlet water jacket 12 and the outlet 131 of the outlet water jacket 13 are located on the first and second sides of the cylinder block, respectively.

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

[0072] Figure 7 A schematic perspective view of a simulated form of a water jacket structure according to another embodiment of the present invention is shown.

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

[0074] According to embodiments of the present invention, such as Figures 2 to 7 As shown, the water inlet of the cylinder body 1 is connected to one end of the water inlet jacket 12 along its length, and the water outlet of the cylinder body 1 is connected to one end of the water outlet jacket 13 along its length.

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

[0076] According to embodiments of the present invention, such as Figures 2 to 7 As shown, the inlet water jacket 12 includes multiple sequentially connected connecting grooves 122, each connecting groove 122 having an arc-shaped cross-section in a reference plane perpendicular to the axial direction of the multiple cylinder bores 11. The outlet water jacket 13 includes multiple sequentially connected mating grooves 132, each mating groove 132 having an arc-shaped cross-section in the reference plane. A connecting groove 122 and a mating groove 132, positioned opposite each other, are located on opposite radial sides of a cylinder bore 11.

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

[0078] According to an embodiment of the present invention, two adjacent mating grooves 132 are smoothly connected to reduce the resistance of coolant flow in the outlet water jacket 13.

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

[0080] In one illustrative embodiment, such as Figure 6 and Figure 7 As shown, the relationship between the number m of the connecting channels 14 and the number n of the cylinder bores 11 is m = n + 1.

[0081] In such an embodiment, the cross-section of each connecting groove 122 and each mating groove 132 in a reference plane perpendicular to the axial direction of the plurality of cylinder bores 11 is a minor arc.

[0082] In one illustrative embodiment, such as Figure 6 and Figure 7 As shown, there are 5 connecting channels 14 and 4 cylinder bores 11.

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

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

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

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

[0087] In this embodiment, the first connecting groove 123, which has a water inlet 121 among the plurality of connecting grooves 122, has a cross-section with a superior arc in a reference plane perpendicular to the axial direction of the plurality of cylinder bores 11, such 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 the first end of the first connecting groove 123, and the second end of the first connecting groove 123 is connected to another connecting groove 122, thus the water inlet 121 is connected to the water inlet of the cylinder body 1.

[0088] In one illustrative embodiment, such as Figures 2 to 5 As shown, there are 4 connecting channels 14 and 4 cylinder bores 11.

[0089] In this embodiment, multiple connecting channels 14 replace the connection between the inlet and outlet sides in a conventional water jacket structure. Since the cross-sectional area of ​​the connecting channels 14 is much smaller than that of the inlet water jacket 12 and / or the outlet water jacket 13, it can reduce the space for the cooling system in the cylinder block 1 while maintaining a similar cooling effect to a conventional water jacket, thus reducing the size of the cylinder block 1 and making the entire engine more compact. Furthermore, the reduction in the size of the cylinder block 1 can reduce the engine weight, contributing to improved fuel efficiency and vehicle performance.

[0090] According to the engine of this utility model embodiment, the water jacket connection structure of the cylinder block 1 of the engine is changed to a form of multiple connected channels 14 to reduce and balance the heat load of the entire engine body, reduce the size of the cylinder block 1, and at the same time, the design of multiple connected channels 14 can not only meet the heat exchange requirements of the cylinder block 1, but also prevent the cylinder block 1 from being too cold, thereby improving fuel economy.

[0091] Figure 8 A schematic top view illustrating a simulated configuration of a water jacket structure according to an embodiment of the present invention is shown. It should be noted that... Figure 8 The inlet and outlet are not shown.

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

[0093] Furthermore, such as Figure 8 As shown, the projected length of the connecting channel is also the chord length of the gap between the inlet and outlet water jackets, which connects them via connecting channel 14. The projected length of each connecting channel is approximately equal to the projected length of the other connecting channels. The central angle corresponding to the projected length is ∠α, where 45°≤α≤90°. For example, α can be any of 45°, 60°, 65°, 75°, and 90°.

[0094] As another aspect of this utility model, a hybrid electric vehicle is provided, comprising any of the aforementioned engine, water tank, and pump body. The water tank is suitable for holding coolant and for cooling the coolant after it has cooled the engine. The pump body is connected to the water tank and is suitable for pumping the coolant in the water tank to the engine's inlet water jacket 12.

[0095] In one illustrative embodiment, a water pump draws coolant from the water tank and delivers it to the engine's inlet water jacket 12. Constrained by the inlet water jacket 12, multiple connecting channels 14, and the outlet water jacket 13, a portion of the coolant flows around each cylinder bore 11, absorbing heat from the cylinder walls and piston. After flowing through the inlet water jacket 12 of the cylinder block 1, another portion flows through the channel between the cylinder block 1 and the cylinder head to the cylinder head water jacket. In the cylinder head water jacket, the coolant flows over the top of the combustion chamber, absorbing heat from the spark plugs, valves, and the combustion chamber. After exiting the cylinder head water jacket, the coolant merges with the coolant in the outlet water jacket 13 of the cylinder block 1 and flows out from the outlet of the cylinder block 1. After being cooled by the radiator, it is pumped back to the water tank by the water pump to continue the circulation.

[0096] The embodiments of the present invention have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination. The scope of the present invention is defined by the appended claims and their equivalents. Various substitutions and modifications can be made by those skilled in the art without departing from the scope of the present invention, and all such substitutions and modifications should fall within the scope of the present invention.

Claims

1. An engine, characterized in that, include: Cylinder block; Cylinder head, suitable for sealing the cylinder block; The cylinder body has the following features: Multiple cylinder bores are designed to accommodate multiple pistons that slide independently. The water inlet jacket is formed by a downward recess from the surface of the cylinder body on one radial side of the plurality of cylinder bores; The outlet water jacket is formed by a downward recess on the side of the plurality of cylinder holes that is radially opposite to the inlet water jacket; and Multiple connecting channels are provided, wherein the inlet water jacket and the outlet water jacket are connected by connecting channels located on one or both sides of each cylinder bore. The flow cross-sectional area of ​​the connecting channels is smaller than the flow cross-sectional area of ​​the inlet water jacket or the outlet water jacket, so that coolant from the outside flows at least partially from the inlet water jacket through each connecting channel into the outlet water jacket, and maintains the pressure difference between the inlet water jacket and the outlet water jacket, thereby enhancing the heat exchange between the multiple connecting channels and the multiple cylinder bores.

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

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

4. The engine according to claim 3, characterized in that, Each of the aforementioned communication channels also includes: The third channel has one end connected to the inlet water jacket and the other end connected to the first end of the second channel, so that the coolant flowing through the third channel can flow into the outlet water jacket through the second channel.

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

6. The engine according to any one of claims 1-4, characterized in that, The water inlet of the cylinder block is connected to one end of the water inlet jacket along its length. The outlet of the cylinder block is connected to one end of the water jacket along its length.

7. The engine according to any one of claims 1-4, characterized in that, The water inlet jacket includes: a plurality of sequentially penetrating connecting grooves, and the cross-section of each connecting groove in a reference plane perpendicular to the axial direction of the plurality of cylinder holes is arc-shaped; The water outlet jacket includes: a plurality of sequentially connected mating grooves, each of which has an arc-shaped cross-section in the reference plane; In this configuration, a connecting groove and a mating groove, which are opposite to each other, are located on opposite sides of the radial direction of one of the cylinder bores.

8. The engine according to claim 7, characterized in that, The cross-section of each of the connecting grooves and each of the mating grooves in the reference plane is a minor arc.

9. The engine according to claim 7, characterized in that, The first connecting groove among the plurality of connecting grooves has a water inlet, and its cross-section in the reference plane is an arc, such that the water inlet jacket extends from the side of the cylinder block opposite to the water outlet jacket to the same side as the water outlet jacket. The water inlet is located at the first end of the first connecting groove, and the second end of the first connecting groove is connected to another connecting groove.

10. A hybrid electric vehicle, characterized in that, include: The engine according to any one of claims 1-9; A water tank, suitable for holding coolant and for cooling the coolant after it has cooled the engine; and The pump body is connected to the water tank and is suitable for pumping the coolant in the water tank to the water jacket of the engine.

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