Cylinder cover water jacket and vehicle

Abstract

The embodiment of the utility model discloses a cylinder cover water jacket and a vehicle, the cylinder cover water jacket comprises a water jacket main body part and a water jacket collecting and discharging part, the water jacket main body part is communicated with the water jacket collecting and discharging part, the water jacket main body part is used for exchanging heat with a cylinder combustion chamber, and the water jacket collecting and discharging part is used for exchanging heat with an engine exhaust pipe; the upper part of the water jacket collecting and discharging part is connected with a first gas overflow pipe, the upper part of the water jacket main body part is connected with a second gas overflow pipe, and a pressure balance pipe is communicated between the first gas overflow pipe and the second gas overflow pipe. According to the cylinder cover water jacket disclosed by the embodiment of the utility model, the pressure balance pipe is communicated between the first gas overflow pipe and the second gas overflow pipe, so that the pressure and temperature between the water jacket main body part and the water jacket collecting and discharging part can be balanced, and the cooling effect of the cylinder cover water jacket on an engine can be ensured, so that the heat efficiency of the engine is improved, and the operation reliability of the engine is ensured; the service life of the engine is prolonged, the using effect is better, and the application range is wider.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle manufacturing, in particular to a cylinder head water jacket and a vehicle with the cylinder head water jacket. Background Art

[0002] Compared with conventional pure fuel engines, hybrid engines need to be started and stopped repeatedly, and when the engine is in extreme operating conditions such as starting, high speed, and high load, the engine's thermal load and mechanical load will increase, affecting the engine's operating reliability.

[0003] The engine is provided with a cylinder head as the core of the internal combustion engine. The cylinder head bears most of the thermal and mechanical loads of the engine, and provides a suitable working environment for key components such as the fuel supply system, ignition system and valve mechanism. Therefore, it is necessary to ensure the operating environment of the cylinder head. The existing cylinder head is provided with a cooling system, which can cool the cylinder head to ensure that the cylinder head is at a suitable operating temperature. However, during the design process of existing hybrid engines, the impact of the operating condition differences between conventional engines and the engine is often ignored or not paid attention to. When the engine is in extreme operating conditions for a long time, its cooling system will have problems such as uneven pressure and temperature distribution, resulting in poor cooling effect of the cooling system, which in turn leads to problems such as engine failure, increasing the occurrence rate of engine failures, and there is room for improvement. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a cylinder head water jacket that can balance the pressure and temperature of various parts of the cylinder head water jacket, ensure the cooling effect of the engine, improve the thermal efficiency of the engine, ensure the reliability of the engine operation, and extend the service life of the engine.

[0005] The cylinder head water jacket according to the embodiment of the utility model comprises: a water jacket main body and a water jacket collecting and draining part, the water jacket main body is communicated with the water jacket collecting and draining part, the water jacket main body is used for exchanging heat with the cylinder combustion chamber, and the water jacket collecting and draining part is used for exchanging heat with the engine exhaust pipe; the upper part of the water jacket collecting and draining part is connected with a first overflow pipe, the upper part of the water jacket main body is connected with a second overflow pipe, and a pressure balance pipe is communicated between the first overflow pipe and the second overflow pipe.

[0006] The cylinder head water jacket according to the embodiment of the utility model can balance the pressure and temperature between the water jacket main body and the water jacket collection and drainage part by connecting the first overflow pipe and the second overflow pipe with a pressure balancing pipe, thereby ensuring the cooling effect of the cylinder head water jacket on the engine, thereby improving the thermal efficiency of the engine, ensuring the reliability of engine operation, extending the service life of the engine, and having better use effect and a wider range of applications.

[0007] According to the cylinder head water jacket of some embodiments of the present invention, the angle between the pressure balance pipe and the horizontal plane is a, the angle between the bottom surface of the cylinder head water jacket and the horizontal plane is b, and it satisfies: a≥b+(5°~13°).

[0008] According to the cylinder head water jacket of some embodiments of the utility model, the outer peripheral wall of the second overflow pipe is connected to the outer peripheral wall of the pressure balance pipe; wherein, the distance between the axis of the first overflow pipe and the axis of the pressure balance pipe is L1, the length of the first overflow pipe is L2, and satisfies: L2≥40mm+L1.

[0009] According to the cylinder head water jacket of some embodiments of the present invention, the diameter of the first overflow pipe is D1, the diameter of the pressure balance pipe is D2, the diameter of the second overflow pipe is D3, and the following conditions are satisfied: D3=D1≥D2+2mm, L1≤D2.

[0010] According to the cylinder head water jacket of some embodiments of the present utility model, the length of the first overflow pipe is L2, the length of the pressure balance pipe is H1, the length of the second overflow pipe is H2, and it satisfies: H1=H2+L2+15mm; wherein H2 satisfies: 73mm≤H2≤90mm.

[0011] According to the cylinder head water jacket of some embodiments of the utility model, an end of the second overflow pipe is connected to the end of the water jacket main body, and an installation port and an overflow port are respectively formed at both ends of the end overflow pipe. The installation port is connected to the end of the second overflow pipe, and the overflow port is connected to the heat dissipation channel.

[0012] According to the cylinder head water jacket of some embodiments of the utility model, the angle between the vertical projection of the end overflow pipe and the vertical projection of the pressure balance pipe is d, and satisfies: 38.2°≤d≤45.2°; wherein, the angle between the bottom surface of the cylinder head water jacket and the horizontal plane is b, the angle between the end overflow pipe and the bottom surface of the cylinder head water jacket is c, and satisfies: b+2°≤c≤d.

[0013] According to the cylinder head water jacket of some embodiments of the utility model, the insertion depth of the end overflow pipe and the second overflow pipe is H3, the diameter of the pressure balance pipe is D2, and satisfies: H3≥1.5D2; and / or, the diameter of the connection between the end overflow pipe and the second overflow pipe is D4, the diameter of the second overflow pipe is D3, and satisfies: D4≥D3+3mm.

[0014] According to some embodiments of the cylinder head water jacket of the present utility model, the water jacket collecting and draining portion is provided with a first water inlet and a first water outlet, and the water jacket main body is provided with a second water inlet and a second water outlet; the first water inlet and the second water inlet are respectively connected with the cylinder body water jacket, and the first water inlet is connected with the first water outlet, and the second water inlet is connected with the second water outlet, the cooling water entering at the first water inlet is suitable for flowing from the first water outlet to the water jacket main body, and the cooling water at the second water inlet and the first water outlet are both suitable for flowing to the second water outlet.

[0015] The utility model also provides a vehicle.

[0016] The vehicle according to the embodiment of the utility model is provided with the cylinder head water jacket described in any one of the above items.

[0017] The vehicle and the above-mentioned cylinder head water jacket have the same advantages as those of the prior art, which will not be described in detail here.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 The structure of the cylinder head water jacket according to the embodiment of the utility model is shown in FIG. Figure 1 ;

[0021] Figure 2 The structure of the cylinder head water jacket according to the embodiment of the utility model is shown in FIG. Figure 2 ;

[0022] Figure 3 The structure of the cylinder head water jacket according to the embodiment of the utility model is shown in FIG. Figure 3 .

[0023] Reference numerals:

[0024] Cylinder head water jacket 100,

[0025] The water jacket body 1, the second water inlet 11, the second water outlet 12, the second overflow pipe 13, the end overflow pipe 14, the installation port 141, the overflow port 142,

[0026] The water jacket collecting and draining part 2 , the first water inlet 21 , the first water outlet 22 , the first overflow pipe 23 , and the pressure balance pipe 24 . DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Unless otherwise specified, the front-to-back direction in the present application is the longitudinal direction of the vehicle, that is, the X direction; the left-right direction is the lateral direction of the vehicle, that is, the Y direction; and the up-down direction is the vertical direction of the vehicle, that is, the Z direction.

[0031] Reference below Figure 1-Figure 3 Description The cylinder head water jacket 100 according to the embodiment of the utility model can balance the pressure and temperature of various parts of the cylinder head water jacket 100, ensure the cooling effect of the engine, improve the thermal efficiency of the engine, ensure the reliability of engine operation, and extend the service life of the engine.

[0032] like Figure 1-Figure 3 As shown, the cylinder head water jacket 100 according to the embodiment of the utility model comprises: a water jacket main body 1 and a water jacket collecting and draining part 2.

[0033] The water jacket main body 1 is connected with the water jacket collecting and draining part 2, the water jacket main body 1 is used for heat exchange with the cylinder combustion chamber, the water jacket collecting and draining part 2 is used for heat exchange with the engine exhaust pipe, the upper part of the water jacket collecting and draining part 2 is connected with a first overflow pipe 23, the upper part of the water jacket main body 1 is connected with a second overflow pipe 13, and a pressure balance pipe 24 is connected between the first overflow pipe 23 and the second overflow pipe 13.

[0034] Among them, the cylinder head is used to seal the cylinder, and can form a combustion space together with the piston, withstand high-temperature and high-pressure gas, and can withstand the force generated by the gas and the mechanical load caused by tightening the cylinder bolts. At the same time, due to contact with high-temperature gas, the cylinder head needs to withstand high thermal load, and in order to ensure good sealing of the cylinder, the cylinder head needs to avoid deformation and cracks, that is, the cylinder head should have sufficient strength and rigidity, and a cylinder head water jacket 100 can be provided in the cylinder head. The cylinder head water jacket 100 can be used to transfer the temperature of the engine combustion chamber and the inner wall of the cylinder body to the cooling water by heat conduction, and the cooling water can be circulated to the radiator through a water pump, and the radiator dissipates heat to the cooling water through the flow of external air, thereby ensuring that the cylinder head is at normal operating temperature and extending the service life.

[0035] Specifically, the cylinder head water jacket 100 is arranged in the cylinder head, and the cylinder head water jacket 100 is provided with a water jacket main body 1 and a water jacket collecting and draining part 2. The water jacket main body 1 and the water jacket collecting and draining part 2 are connected, and connected cooling channels are arranged in the water jacket main body 1 and the water jacket collecting and draining part 2. Cooling water can flow in the cooling channel to exchange heat. The water jacket main body 1 is arranged corresponding to the cylinder combustion chamber, and the water jacket collecting and draining part 2 is arranged corresponding to the engine exhaust pipe. When the engine is running, heat is generated inside due to fuel combustion, etc., which causes the engine to heat up. The cooling water temperature in the cooling channel of the cylinder head water jacket 100 is relatively low. Through the principle of thermal balance, the heat of a high-temperature object will be transferred to a low-temperature object, so that the cooling water in the cooling channel of the water jacket main body 1 can exchange heat with the cylinder combustion chamber, and the cooling water in the cooling channel of the water jacket collecting and draining part 2 can exchange heat with the engine exhaust pipe, thereby reducing the temperature of the cylinder combustion chamber and the engine exhaust pipe, so that the engine is at a suitable operating temperature and the reliability of engine operation is ensured.

[0036] Furthermore, the cylinder head water jacket 100 is connected with an overflow pipe, which is connected with the cooling flow channel. When cooling water flows into the cooling flow channel, gas will exist. When the cooling water is heat exchanged, the gas and cooling water will expand. The cylinder head water jacket 100 is connected with an overflow pipe to discharge the gas and excess cooling water, thereby ensuring that the pressure in the cooling flow channel of the cylinder head water jacket 100 is within a normal range, thereby ensuring the reliability of the operation of the cylinder head water jacket 100.

[0037] A first overflow pipe 23 is provided on the water jacket collection and drainage part 2, and the first overflow pipe 23 is connected to the cooling flow channel in the water jacket collection and drainage part 2. A second overflow pipe 13 is provided on the water jacket main body 1, and the second overflow pipe 13 is connected to the cooling flow channel in the water jacket main body 1. A pressure balance pipe 24 is provided between the first overflow pipe 23 and the second overflow pipe 13, and the pressure balance pipe 24 is respectively connected to the first overflow pipe 23 and the second overflow pipe 13, that is, the cooling water and gas in the first overflow pipe 23 and the second overflow pipe 13 can flow into the pressure balance pipe 24.

[0038] When the engine is running, the cylinder combustion chamber of the engine can burn fuel to generate power, etc., and the gas generated after combustion can be discharged through the engine exhaust pipe, so that the cylinder combustion chamber and the exhaust pipe will both be heated up, and the temperature of the cylinder combustion chamber and the exhaust pipe is different, which leads to different temperatures and pressures of the cooling water inside the water jacket main body 1 and the water jacket drainage part 2 after heat exchange. The cooling water and gas in the water jacket main body 1 can be discharged through the second overflow pipe 13, and the cooling water and gas in the water jacket drainage part 2 can be discharged through the first overflow pipe 23, and a pressure balance pipe 24 is connected between the first overflow pipe 23 and the second overflow pipe 13, so that the pressure and temperature in the water jacket main body 1 and the water jacket drainage part 2 can be balanced, thereby ensuring the cooling effect of the cylinder head water jacket 100 on the engine, so as to improve the thermal efficiency of the engine, thereby ensuring the reliability of engine operation and extending the service life of the engine.

[0039] According to the cylinder head water jacket 100 of the embodiment of the utility model, a pressure balance pipe 24 is connected between the first overflow pipe 23 and the second overflow pipe 13, so that the pressure and temperature between the water jacket main body 1 and the water jacket collection and drainage part 2 can be balanced, thereby ensuring the cooling effect of the cylinder head water jacket 100 on the engine, so as to improve the thermal efficiency of the engine, ensure the reliability of engine operation, extend the service life of the engine, and have better use effect and a wider range of applications.

[0040] In some embodiments, the angle between the pressure balance pipe 24 and the horizontal plane is a, the angle between the bottom surface of the cylinder head water jacket 100 and the horizontal plane is b, and the following condition is satisfied: a≥b+(5°~13°).

[0041] Specifically, Figure 1As shown, the water jacket collecting and draining part 2 is connected with a first overflow pipe 23, the water jacket main body 1 is connected with a second overflow pipe 13, and a pressure balance pipe 24 is connected between the first overflow pipe 23 and the second overflow pipe 13, that is, the first overflow pipe 23, the second overflow pipe 13 and the pressure balance pipe 24 are all arranged above the cylinder head water jacket 100, and there is an angle between the pressure balance pipe 24 and the horizontal plane, and the angle is set to a. When the cylinder is installed, there may be an inclined setting, which will cause an angle between the bottom surface of the cylinder head water jacket 100 and the horizontal plane. The angle can be set to b, and a and b are set to satisfy: a≥b+(5°~13°), that is, the angle a is set to be greater than the angle b, that is, when the cylinder head water jacket 100 is horizontally set, the pressure balance pipe 24 is also inclined relative to the bottom surface of the cylinder head water jacket 100, thereby ensuring the pressure balancing effect of the pressure balance pipe 24 on the first overflow pipe 23 and the second overflow pipe 13.

[0042] In some embodiments, the outer peripheral wall of the second overflow pipe 13 is connected to the outer peripheral wall of the pressure balance pipe 24; wherein the distance between the axis of the second overflow pipe 13 and the axis of the pressure balance pipe 24 is L1, the length of the first overflow pipe 23 is L2, and satisfies: L2≥40mm+L1.

[0043] Specifically, Figure 3 As shown, a pressure balance pipe 24 is arranged between the first overflow pipe 23 and the second overflow pipe 13, and the pressure balance pipe 24 is respectively connected to the first overflow pipe 23 and the second overflow pipe 13, the outer peripheral wall of the first overflow pipe 23 is connected to the outer peripheral wall of the pressure balance pipe 24, and the outer peripheral wall of the second overflow pipe 13 is connected to the outer peripheral wall of the pressure balance pipe 24, so that there is a distance between the axes of the first overflow pipe 23 and the pressure balance pipe 24, and there is a distance between the axes of the second overflow pipe 13 and the pressure balance pipe 24, and the distance between the axis of the second overflow pipe 13 and the axis of the pressure balance pipe 24 can be set to L1.

[0044] Furthermore, the length of the first overflow pipe 23 can be set to L2, and L1 and L2 are set to satisfy: L2≥40mm+L1, that is, the length of the first overflow pipe 23 is set equal to the sum of the distance between the axes of the second overflow pipe 13 and the pressure balance pipe 24 and 40mm, and can also be set so that the length of the first overflow pipe 23 is greater than the sum of the distance between the axes of the second overflow pipe 13 and the pressure balance pipe 24 and 40mm, thereby improving the comprehensiveness of the engine operating conditions, ensuring the balance of pressure at various locations in the cylinder head water jacket 100, and ensuring the feasibility of the machining and assembly processes.

[0045] In some embodiments, the diameter of the first overflow pipe 23 is D1, the diameter of the pressure balance pipe 24 is D2, and the diameter of the second overflow pipe 13 is D3, and the following conditions are satisfied: D3 = D1 ≥ D2 + 2 mm, L1 ≤ D2.

[0046] Specifically, Figure 2-Figure 3 As shown, the first overflow pipe 23 is connected to the water jacket collection and drainage part 2, and the second overflow pipe 13 is connected to the water jacket main body 1. The first overflow pipe 23, the second overflow pipe 13 and the pressure balance pipe 24 can be set as cylindrical pipes, and the diameter of the first overflow pipe 23 is D1, the diameter of the pressure balance pipe 24 is D2, and the diameter of the second overflow pipe 13 is D3. At the same time, D1, D2 and D3 can be set to meet: D3 = D1 ≥ D2 + 2mm, that is, the diameter of the first overflow pipe 23 and the diameter of the second overflow pipe 13 can be set to be the same, and the diameter of the first overflow pipe 23 is D1. The diameter of the first overflow pipe 23 and the diameter of the second overflow pipe 13 can be set to be equal to the sum of the diameter of the pressure balance pipe 24 and 2 mm, or the diameter of the first overflow pipe 23 and the diameter of the second overflow pipe 13 are larger than the sum of the diameter of the pressure balance pipe 24 and 2 mm, and the distance between the axis of the second overflow pipe 13 and the axis of the pressure balance pipe 24 can be set to be equal to the diameter of the pressure balance pipe 24, or the distance between the axis of the second overflow pipe 13 and the axis of the pressure balance pipe 24 is smaller than the diameter of the pressure balance pipe 24, thereby ensuring the balance of pressure at various locations in the cylinder head water jacket 100.

[0047] In some embodiments, the length of the first overflow pipe 23 is L2, the length of the pressure balance pipe 24 is H1, and the length of the second overflow pipe 13 is H2, and they satisfy: H1 = H2 + L2 + 15 mm; wherein H2 satisfies: 73 mm ≤ H2 ≤ 90 mm.

[0048] Specifically, one end of the first overflow pipe 23 is connected to the water jacket collection and drainage part 2, and the other end is closed. The length of the first overflow pipe 23 can be set to L2, and both ends of the pressure balance pipe 24 are set to be closed. Figure 3 As shown, the first overflow pipe 23 and the second overflow pipe 13 are both connected to the outer peripheral wall of the pressure balance pipe 24 through the outer peripheral wall, the length of the pressure balance pipe 24 can be set to H1, the length of the second overflow pipe 13 can be set to H2, and L2, H1 and H2 are set to satisfy: H1 = H2 + L2 + 15mm, that is, the length of the pressure balance pipe 24 is equal to the length of the first overflow pipe 23, the sum of the length of the first overflow pipe 23 and 15mm, and the length of the second overflow pipe 13 is H2, H2 satisfies: 73mm≤H2≤90mm, that is, the length H2 of the second overflow pipe 13 can be set to 73mm, 80mm or 90mm, etc., thereby ensuring the balance of pressure at various locations in the cylinder head water jacket 100 and the feasibility of machining and assembly processes.

[0049] In some embodiments, the end of the second overflow pipe 13 facing away from the water jacket main body 1 is connected to the end overflow pipe 14, and the two ends of the end overflow pipe 14 are respectively formed with an installation port 141 and an overflow port 142, the installation port 141 is connected to the end of the second overflow pipe 13, and the overflow port 142 is connected to the heat dissipation channel.

[0050] Specifically, Figure 1-Figure 2 As shown, one end of the second overflow pipe 13 is connected to the water jacket main body 1, and the other end is provided with an end overflow pipe 14, that is, the end overflow pipe 14 is arranged at the end of the second overflow pipe 13 away from the water jacket main body 1, so that the gas, cooling water, etc. in the second overflow pipe 13 can flow into the end overflow pipe 14, and the end overflow pipe 14 is provided with a mounting port 141 and an overflow port 142, the mounting port 141 is arranged at one end of the end overflow pipe 14 close to the second overflow pipe, and the overflow port 142 is arranged at one end of the end overflow pipe 14 away from the second overflow pipe. , and the end overflow pipe 14 can be connected to the end of the second overflow pipe 13 through the installation port 141, and the end overflow pipe 14 can be connected to the heat dissipation channel through the overflow port 142, so that the gas or cooling water in the second overflow pipe 13 can enter the end overflow pipe 14 through the installation port 141, and then flow into the heat dissipation channel through the overflow port 142, so that the gas, high-temperature water vapor or excess cooling water in the cylinder head water jacket 100 can be discharged into the heat dissipation channel, thereby balancing the pressure between the water jacket collection and drainage part 2 and the water jacket main body 1.

[0051] In some embodiments, the angle between the vertical projection of the end overflow pipe 14 and the vertical projection of the pressure balance pipe 24 is d, and satisfies: 38.2°≤d≤45.2°; wherein, the angle between the bottom surface of the cylinder head water jacket 100 and the horizontal plane is b, and the angle between the end overflow pipe 14 and the bottom surface of the cylinder head water jacket 100 is c, and satisfies: b+2°≤c≤d.

[0052] Specifically, Figure 1-Figure 2 As shown, the end overflow pipe 14 is connected to the end of the second overflow pipe 13 away from the water jacket main body 1, and the end overflow pipe 14 is configured as an arc-shaped cylindrical pipe, and there is an angle between the vertical projection of the end overflow pipe 14 and the vertical projection of the pressure balance pipe 24, and the angle is set to d and satisfies: 38.2°≤d≤45.2°, that is, the angle d between the vertical projection of the end overflow pipe 14 and the vertical projection of the pressure balance pipe 24 can be set to 38.2°, 40° or 45.2°, etc.

[0053] And when the cylinder is installed, it may be tilted, which will cause an angle between the bottom surface of the cylinder head water jacket 100 and the horizontal plane. The angle can be set to b, and there is also an angle between the end overflow pipe 14 and the bottom surface of the cylinder head water jacket 100, which is set to c, and b, c and d are set to satisfy: b+2°≤c≤d, that is, the angle between the end overflow pipe 14 and the bottom surface of the cylinder head water jacket 100 can be set to be equal to the angle between the vertical projection of the end overflow pipe 14 and the vertical projection of the pressure balance pipe 24 and equal to the sum of the angle between the bottom surface of the cylinder head water jacket 100 and the horizontal plane and 2°, or it can be set to be between the angle between the vertical projection of the end overflow pipe 14 and the vertical projection of the pressure balance pipe 24 and the angle between the bottom surface of the cylinder head water jacket 100 and the horizontal plane and 2°, which can avoid the backflow of cooling water and ensure the cooling effect.

[0054] In some embodiments, the insertion depth of the end overflow pipe 14 and the second overflow pipe 13 is H3, the diameter of the pressure balance pipe 24 is D2, and satisfies: H3≥1.5D2; and / or, the diameter of the connection between the end overflow pipe 14 and the second overflow pipe 13 is D4, the diameter of the second overflow pipe 13 is D3, and satisfies: D4≥D3+3mm.

[0055] Specifically, the end overflow pipe 14 is connected to one end of the second overflow pipe 13 away from the water jacket main body 1, and the end overflow pipe 14 and the second overflow pipe 13 are plugged together, that is, the connection between the end overflow pipe 14 and the second overflow pipe 13 has an overlapping part, thereby ensuring the connection reliability, and the plugging depth of the end overflow pipe 14 and the second overflow pipe 13 can be set to H3, the diameter of the pressure balance pipe 24 can be set to D2, and H3 and D2 can be set to satisfy: H3≥1.5D2, that is, the plugging depth of the end overflow pipe 14 and the second overflow pipe 13 can be set to be equal to one and a half times the diameter of the pressure balance pipe 24, and can also be set to be greater than one and a half times the diameter of the pressure balance pipe 24.

[0056] Furthermore, the end overflow pipe 14 is plugged and connected with the second overflow pipe 13, so that the connection between the end overflow pipe 14 and the second overflow pipe 13 has an overlapping part, and the diameter of the connection is set to D4, and the diameter of the second overflow pipe 13 can be set to D3, that is, D4 and D3 can be set to satisfy: D4≥D3+3mm, that is, the diameter of the connection between the end overflow pipe 14 and the second overflow pipe 13 can be set to be equal to the sum of the straightness of the second overflow pipe 13 and 3mm, and can also be set to be greater than the sum of the straightness of the second overflow pipe 13 and 3mm, thereby meeting the layout requirements of the entire vehicle.

[0057] In some embodiments, the water jacket drainage portion 2 is provided with a first water inlet 21 and a first water outlet 22, and the water jacket main body 1 is provided with a second water inlet 11 and a second water outlet 12; the first water inlet 21 and the second water inlet 11 are respectively connected to the cylinder water jacket, and the first water inlet 21 is connected to the first water outlet 22, and the second water inlet 11 is connected to the second water outlet 12, the cooling water entering at the first water inlet 21 is suitable for flowing from the first water outlet 22 to the water jacket main body 1, and the cooling water at the second water inlet 11 and the first water outlet 22 are both suitable for flowing to the second water outlet 12.

[0058] Specifically, Figure 3 As shown, the cylinder head water jacket 100 is provided with a connected water jacket collection and drainage part 2 and a water jacket main body 1, and the water jacket main body 1 and the water jacket collection and drainage part 2 are provided with connected cooling flow channels, so that the water jacket collection and drainage part 2 can cool the engine exhaust pipe, and the water jacket main body 1 can cool the cylinder combustion chamber, thereby ensuring the reliability of engine operation, and the water jacket collection and drainage part 2 is provided with a first water inlet 21 and a first water outlet 22, the first water inlet 21 is connected with the first water outlet 22, that is, cooling water can enter the water jacket collection and drainage part 2 from the first water inlet 21, and then be discharged from the water jacket collection and drainage part 2 from the first water outlet 22, and the water jacket main body 1 is provided with a second water inlet 11 and a second water outlet 12, the second water inlet 11 is connected with the second water outlet 12, that is, cooling water can enter the water jacket main body 1 from the second water inlet 11, and then be discharged from the water jacket main body 1 from the second water outlet 12.

[0059] Furthermore, the cylinder head water jacket 100 is arranged above the cylinder body water jacket, and the first water inlet 21 and the second water inlet 11 are respectively connected to the cylinder body water jacket, and a cooling flow channel is also arranged in the cylinder body water jacket, and the cooling water in the cylinder body water jacket can enter the water jacket collection and drainage part 2 and the water jacket main body 1 through the first water inlet 21 and the second water inlet 11 respectively, and the cooling water entering at the first water inlet 21 can flow from the first water outlet 22 to the water jacket main body 1, that is, the cooling water out of the first water outlet 22 can enter the water jacket main body 1 through the second water inlet 11, so that the cooling water at the second water inlet 11 and the first water outlet 22 can flow to the second water outlet 12, wherein, as Figure 3 As shown, two second water inlets 11 are provided, and the two second water inlets 11 are respectively located on both sides of the first water outlet 22, thereby facilitating the first water outlet 22 to flow into the second water inlet 11, which can reduce heat loss during the flow of cooling water.

[0060] In the actual setting, most of the cooling water can flow into the water jacket collection and drainage part 2 from the first water inlet 21, and a small part of the cooling water can flow into the water jacket main body 1 from the second water inlet 11, that is, more than 90% of the cooling water can flow into the water jacket collection and drainage part 2 from the first water inlet 21, and the remaining cooling water can flow into the water jacket main body 1 from the second water inlet 11. The temperature of the engine exhaust pipe is relatively high, and the cooling water in the water jacket collection and drainage part 2 can be quickly heated up, and the heated cooling water can be discharged to the second water inlet 11 through the first water outlet 22, and then flow into the water jacket main body 1 through the second water inlet 11, thereby improving the warm-up speed of the hybrid engine, and the warm-up speed can be increased by 15% to 20%, which can avoid the problems of abnormal fuel combustion and high engine fuel consumption caused by the low-temperature cooling water cooling the water jacket main body 1 when the engine is initially started, and can reduce the exhaust temperature of the engine under long-term and high-load conditions, and the exhaust temperature can be reduced by 13% to 18%. Thus, the thermal load of the engine is reduced.

[0061] The utility model also provides a vehicle.

[0062] The vehicle according to the embodiment of the utility model is provided with any one of the cylinder head water jackets 100 described above.

[0063] According to the vehicle of the embodiment of the utility model, a cylinder head water jacket 100 is provided. The cylinder head water jacket 100 is connected with a pressure balance pipe 24 between the first overflow pipe 23 and the second overflow pipe 13, so as to balance the pressure and temperature between the water jacket main body 1 and the water jacket collection and drainage part 2, thereby ensuring the cooling effect of the cylinder head water jacket 100 on the engine, so as to improve the thermal efficiency of the engine, ensure the reliability of the engine operation, extend the service life of the engine, and have better use effect and a wider range of application.

[0064] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0065] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A cylinder head water jacket, characterized in that: include: A water jacket main body and a water jacket collecting and draining part, wherein the water jacket main body is communicated with the water jacket collecting and draining part, the water jacket main body is used for exchanging heat with the cylinder combustion chamber, and the water jacket collecting and draining part is used for exchanging heat with the engine exhaust pipe; The upper part of the water jacket collecting and draining part is connected with a first overflow pipe, the upper part of the water jacket main body is connected with a second overflow pipe, and a pressure balance pipe is connected between the first overflow pipe and the second overflow pipe.

2. The cylinder head water jacket according to claim 1, characterized in that: The angle between the pressure balance pipe and the horizontal plane is a, the angle between the bottom surface of the cylinder head water jacket and the horizontal plane is b, and they satisfy: a≥b+(5°~13°).

3. The cylinder head water jacket according to claim 1, characterized in that: The outer peripheral wall of the second overflow pipe is connected to the outer peripheral wall of the pressure balance pipe; The distance between the axis of the second overflow pipe and the axis of the pressure balance pipe is L1, the length of the first overflow pipe is L2, and the following condition is satisfied: L2≥40mm+L1.

4. The cylinder head water jacket according to claim 3, characterized in that: The diameter of the first overflow pipe is D1, the diameter of the pressure balance pipe is D2, and the diameter of the second overflow pipe is D3, and the following conditions are satisfied: D3 = D1 ≥ D2 + 2 mm, L1 ≤ D2.

5. The cylinder head water jacket according to claim 1, characterized in that: The length of the first overflow pipe is L2, the length of the pressure balance pipe is H1, and the length of the second overflow pipe is H2, and the following conditions are satisfied: H1 = H2 + L2 + 15 mm; Among them, H2 satisfies: 73mm≤H2≤90mm.

6. The cylinder head water jacket according to claim 1, characterized in that: An end of the second overflow pipe away from the water jacket main body is connected to an end overflow pipe, and both ends of the end overflow pipe are respectively formed with a mounting port and an overflow port, the mounting port is connected to the end of the second overflow pipe, and the overflow port is connected to the heat dissipation channel.

7. The cylinder head water jacket according to claim 6, characterized in that: The included angle between the vertical projection of the end overflow pipe and the vertical projection of the pressure balance pipe is d, and satisfies: 38.2°≤d≤45.2°; Among them, the angle between the bottom surface of the cylinder head water jacket and the horizontal plane is b, the angle between the end overflow pipe and the bottom surface of the cylinder head water jacket is c, and it satisfies: b+2°≤c≤d.

8. The cylinder head water jacket according to claim 6, characterized in that: The insertion depth of the end overflow pipe and the second overflow pipe is H3, the diameter of the pressure balance pipe is D2, and the following conditions are satisfied: H3≥1.5D2; And / or, the diameter of the connection between the end overflow pipe and the second overflow pipe is D4, the diameter of the second overflow pipe is D3, and it satisfies: D4≥D3+3mm.

9. The cylinder head water jacket according to claim 1, characterized in that: The water jacket collecting and draining part is provided with a first water inlet and a first water outlet, and the water jacket main body is provided with a second water inlet and a second water outlet; The first water inlet and the second water inlet are respectively connected to the cylinder water jacket, and the first water inlet is connected to the first water outlet, and the second water inlet is connected to the second water outlet, the cooling water entering at the first water inlet is suitable for flowing from the first water outlet to the water jacket main body, and the cooling water at the second water inlet and the first water outlet are both suitable for flowing to the second water outlet.

10. A vehicle, characterized in that: A cylinder head water jacket according to any one of claims 1 to 9 is provided.

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