Engine waterway

Abstract

The engine waterway comprises a cylinder cover water jacket and is characterized in that a guide chain cavity and a cylinder cover are arranged at the front end of the cylinder cover water jacket, an exhaust port is formed in the exhaust side of the cylinder cover, and a water outlet is formed between the guide chain cavity and the exhaust side of the cylinder; a plurality of straight water channels are arranged inside the air cylinder water jacket, the straight water channels are communicated with the air cylinder body, and cooling liquid directly enters an engine water channel through the straight water channels to cool an exhaust port pipeline. And a larger space is reserved for other structures of the whole automobile.

Description

Technical Field

[0001] The utility model relates to the field of engine water channel design and provides an engine water channel. Background Art

[0002] At present, automobile engines on the market are generally water-cooled. The flow direction of the traditional engine water jacket coolant is: the coolant output by the engine water pump flows from one side of the cylinder body through the diversion from both sides around the cylinder sleeve to the other side, and then flows to the cylinder head water jacket through the small holes of the cylinder gasket, and finally flows out of the body from the water outlet on the cylinder head. After the coolant flows through the cylinder body, it has been heated, taking away part of the heat of the cylinder sleeve, and then reaches the cylinder head, making the cylinder temperature on the side that needs to be heated lower, increasing the friction of the piston assembly, and increasing the engine fuel consumption. In addition, the pipeline layout of the cooling water jacket is cumbersome and long, which greatly affects the overall vehicle layout and water resistance, and is not simple enough in the overall vehicle structure.

[0003] CN203640848U discloses "a split-flow engine cooling water jacket", including a cylinder water jacket and a cylinder head water jacket corresponding to the cylinder water jacket, a sealing gasket is arranged between the cylinder water jacket and the cylinder head water jacket, the cylinder water jacket is an annular water groove corresponding to the shape of the cylinder, a water inlet is arranged on one side surface of the cylinder water jacket, and a water outlet is arranged on the other side surface of the cylinder water jacket; sealing gasket through holes corresponding to the notch of the cylinder water jacket are arranged on both sides of the sealing gasket; cylinder head water jacket through holes corresponding to the sealing gasket through holes are arranged on both sides of the cylinder head water jacket. The water inlet is arranged on the exhaust side of the cylinder, and the water outlet is arranged on the intake side. The coolant flows through the cylinder water jacket and the cylinder head water jacket and then flows out from the intake side, which reduces the number of coolant pipelines as a whole, has high utilization efficiency of the coolant, reduces internal friction of the engine, has high combustion efficiency of the engine, and improves the service life of engine parts. Summary of the invention

[0004] The purpose of the utility model is to overcome the problem that there are too many coolant pipes in the existing engine water circuit technology, which affects the internal structure layout of the automobile and the water circuit resistance is insufficient. A water circuit structure is provided, which directly takes in water from the cylinder body and discharges water from the exhaust side. The water circuit structure reduces the pipes required for the water inlet path, leaving more space for other structures of the entire automobile. The second purpose of the utility model is to overcome the problem that the coolant is not sufficiently cooled in the cylinder water jacket and the temperature inside the cylinder water jacket is uneven. A "W"-shaped water channel is provided, which is tightly fitted with the outer wall of the pipe of the exhaust port. When the water circuit is flowing, the coolant flows through the outer wall of the pipe of the exhaust port through the "W"-shaped water channel, and the pipe is fully cooled. The water channel is narrow and fits with the outer wall of the pipe, so the coolant can fully contact with the pipe, thereby improving the cooling efficiency.

[0005] The engine water circuit of the utility model comprises a cylinder block and a cylinder head water jacket, a chain guide cavity and a cylinder head are arranged at the front end of the cylinder head water jacket, an exhaust port is arranged at the exhaust side of the cylinder head, and a water outlet is arranged between the chain guide cavity and the exhaust side of the cylinder; a plurality of straight water channels are arranged inside the cylinder water jacket, and the straight water channels are communicated with the cylinder block. When the engine is working, the coolant flows into the cylinder water jacket through the straight water channels, thereby reducing the pipes required for the water inlet path and leaving more space for other structures of the whole automobile.

[0006] The cylinder water jacket is provided with 3 to 4 "W"-shaped water channels, which are closely fitted with the outer wall of the exhaust pipe, and the number of the exhaust ports is consistent with the number of "W"-shaped water channels. When the water channel is flowing, the water flows through the outer wall of the exhaust pipe through the "W"-shaped water channel, and the exhaust pipe is fully cooled.

[0007] Furthermore, a water outlet cover is provided on the cylinder head, and a sealing ring is provided between the water outlet cover and the cylinder head, which functions to form an effective seal between the water outlet cover and the cylinder head to prevent leakage of liquid, gas or solid particles, and prevent the intrusion of external dust, moisture and other impurities.

[0008] Furthermore, a cylinder gasket is provided between the cylinder block and the cylinder head water jacket, and a cylinder port is provided in the middle of the cylinder gasket, and the number of the cylinder ports is consistent with the number of cylinders configured in the engine. The diameter of the cylinder port in the cylinder gasket is 1 to 2 mm larger than the diameter of the engine cylinder to prevent excessive wear.

[0009] Furthermore, the cylinder gasket is provided with a water hole in the nose bridge area of ​​the first cylinder, a water hole in the nose bridge area of ​​the second cylinder, and a water hole in the nose bridge area of ​​the third cylinder near the exhaust side of the engine.

[0010] Furthermore, the cylinder gasket is provided with a cylinder head water jacket upper water hole near the front end of the cylinder head water jacket, and is provided with a first / second cylinder upper water hole and a second / third cylinder upper water hole on the air intake side near the engine for transmitting coolant.

[0011] Furthermore, the cylinder head water jacket is provided with a cylinder head water jacket water inlet at the bottom, and the cylinder head water jacket water inlet is communicated with the cylinder head water jacket upper water hole on the cylinder gasket to form a water flow branch.

[0012] Furthermore, the straight water channel is connected to the corresponding part of the nose bridge area, one end of which is connected to the cylinder head water jacket, and the other end of which is connected to the upper water hole of the nose bridge area of ​​the first cylinder, the upper water hole of the nose bridge area of ​​the second cylinder, and the upper water hole of the nose bridge area of ​​the third cylinder on the cylinder gasket, forming three water flow branches.

[0013] The beneficial effects of the utility model are as follows: (1) the "W"-shaped water channel in the cylinder head water jacket allows the coolant to fully contact the outer wall of the exhaust pipe, so that the exhaust pipe can be fully cooled; (2) since the straight water channel is arranged in the nose bridge area of ​​the cylinder head, the maximum temperature of the engine body is greatly reduced, and the cylinder body temperature can be made uniform by adjusting the flow rates of the straight water channel and the "W"-shaped water channel; (3) the cylinder head water jacket directly inlets water from the cylinder body, which reduces the layout of the water pipes and provides a larger equipment space for other structures of the entire vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional structural schematic diagram of the utility model.

[0015] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model.

[0016] Figure 3 This is a schematic diagram of the cylinder gasket structure in the utility model.

[0017] Description of the component numbers in the accompanying drawings.

[0018] 1. Cylinder head water jacket; 2. Chain guide chamber; 3. Cylinder head; 4. Exhaust port; 5. Water outlet; 6. Straight water channel; 7. W-shaped water channel; 8. Water outlet cover; 9. Sealing ring; 10. Cylinder gasket; 11. Water hole on cylinder head water jacket; 12. Water hole between cylinders one and two; 13. Water hole between cylinders two and three; 14. Water hole on the nose bridge area of ​​cylinder one; 15. Water hole on the nose bridge area of ​​cylinder two; 16. Water hole on the nose bridge area of ​​cylinder three; 17. Water hole on cylinder head water jacket; 18. Cylinder mouth. DETAILED DESCRIPTION

[0019] like Figure 1 As shown, the present embodiment is characterized in that a chain guide chamber 2 and a cylinder head 3 are provided at the front end of a cylinder head water jacket 1, an exhaust port 4 is provided at the exhaust side of the cylinder head 3, a water outlet 5 is provided between the chain guide chamber 2 and the exhaust side of the cylinder, and a plurality of straight water channels 6 are provided inside the cylinder water jacket 1, and the straight water channels 6 are vertically downward and connected to the cylinder body.

[0020] like Figure 1 As shown, the cylinder water jacket 1 in this embodiment is provided with 3-4 "W"-shaped water channels 7, and the "W"-shaped water channels 7 are closely fitted with the outer wall of the pipe of the exhaust port 4. When the engine is working, the exhaust port 4 of the engine will emit a lot of heat, and the "W"-shaped water channels 7 in the cylinder water jacket 1 are closely fitted with the outer wall of the pipe of the exhaust port 4, so that the coolant can play the maximum role. In order to ensure the maximum effect of the "W"-shaped water channels 7, the number of the exhaust port 4 is consistent with the number of the "W"-shaped water channels 7.

[0021] like Figure 1As shown, the "W"-shaped water channel 7 provided in the present embodiment is in close contact with the outer wall of the pipe of the exhaust port 4, which has the advantage of not only improving the cooling efficiency of the coolant, but also preventing uneven temperature inside the cylinder head water jacket, and preventing coolant leakage caused by uneven temperature inside the water jacket, damage to the exhaust pipe or thermal stress on the cylinder head water jacket structure.

[0022] like Figure 2 As shown, in this embodiment, a water outlet cover 8 is provided on the cylinder head 3, and a sealing ring 9 is provided between the water outlet cover 8 and the cylinder head 3. The main function of the sealing ring 9 is to form an effective seal between the water outlet cover 8 and the cylinder head 3 to prevent leakage of liquid, gas or solid particles, and prevent the intrusion of external dust, moisture and other impurities, so as to ensure the normal operation of the engine and the motor starting system.

[0023] like Figure 1 As shown, in this embodiment, a cylinder gasket 10 is provided between the cylinder block and the cylinder head water jacket 1. The cylinder gasket is made of a perforated steel plate as a skeleton, covered with asbestos and a binder. The advantage of selecting a cylinder gasket of this material is that it can enhance thermal conductivity and balance the temperature of the cylinder block and the cylinder head. This cylinder gasket has good elasticity and heat resistance and is widely used. Its function is to fill the microscopic pores between the cylinder block and the cylinder head water jacket 1, ensure good sealing at the joint surface, and then ensure the sealing of the combustion chamber to prevent air leakage in the cylinder and water leakage in the water jacket.

[0024] Furthermore, in this embodiment, considering that the engine works in an environment of high temperature, high pressure, high explosion rate, high power and various media such as lubricating oil, antifreeze, gas, etc., fluororubber and silicone rubber can be selected as sealing materials for engine cylinder gaskets. Fluororubber is an organic elastomer copolymerized by fluorine-containing monomers. In addition to having excellent heat resistance, medium resistance and good physical and mechanical properties, it also has low compression permanent deformation, good elasticity and ultra-long service life. Fluororubber has outstanding heat resistance and oil resistance and can be used as a material for cylinder gaskets. The disadvantage is poor cold resistance, and the operating temperature range is: -30℃~230℃; the vulcanization system of fluororubber includes three types: amine vulcanization, bisphenol (polyol) vulcanization and peroxide vulcanization. Among them, the characteristic of amine vulcanization is that the compression permanent deformation is relatively large, and the characteristic of bisphenol (polyol) vulcanization is that the compression permanent deformation is low but the water resistance is slightly poor. The characteristics of peroxide vulcanization are excellent water resistance, resistance to amines in some lubricating oils, no cracking, and relatively balanced overall performance, but the price is somewhat expensive. In actual production, it is selected according to actual needs.

[0025] In addition, the cylinder gasket 10 can be made of metal. Metal gaskets have high strength and strong corrosion resistance, and are mostly used in engines with a high degree of reinforcement. High-quality aluminum plate cylinder gaskets have rubber rings to seal the coolant holes; stainless steel laminated cylinder gaskets have rubber rings to seal the coolant holes. Metal cylinder gaskets do not contain asbestos interlayers, which reduces the generation of cylinder gasket airbags in actual production activities. This has certain technical breakthroughs in environmental protection, and this will also become one of the future research and development directions of cylinder gaskets 10.

[0026] like Figure 1 As shown, in the method of this embodiment, the middle part of the cylinder gasket 10 has multiple cylinder ports 18, the number of which is consistent with the number of cylinders configured in the engine, and the diameters thereof do not fit the cylinders, and are all 1 to 2 mm larger than the cylinder diameters. This has the advantage of preventing excessive wear between the cylinder gasket 10 and the cylinder.

[0027] like Figure 1 As shown, in this embodiment, the material of the cylinder head 3 is aluminum alloy, which has good thermal conductivity and is conducive to improving the compression ratio of the engine. Secondly, it has excellent casting performance and is suitable for casting parts with complex structures. However, it is necessary to pay attention to the cooling of the aluminum alloy cylinder head 3 and control the temperature of its bottom plane below 300°C. Otherwise, the bottom plane will overheat and produce plastic deformation and warp. In this embodiment, the working conditions of the cylinder head 4 are: (1) The cylinder head 4 will be subjected to the high-temperature and high-pressure gas, and bear a large bolt preload, resulting in large mechanical stress; (2) The cylinder head 4 has a complex structure and a serious uneven temperature field, resulting in large thermal stress. In severe cases, it will cause cracks and overall deformation of the cylinder head; Therefore, in this embodiment, the design requirements for the cylinder head 3 are: (1) Sufficient rigidity and strength, small working deformation, and guaranteed sealing; (2) Reasonable arrangement of the combustion chamber, valve, and airway to ensure the working performance of the engine; (3) Good processability, as uniform as possible temperature field, reduce thermal stress, and avoid thermal cracking.

[0028] like Figure 1 As shown, in the method of this embodiment, the cylinder gasket 10 is provided with a cylinder head water jacket upper water hole 11 at the part close to the front end of the cylinder head water jacket 1, and is provided with a first / second cylinder upper water hole 12 and a second / third cylinder upper water hole 13 at the intake side close to the engine.

[0029] like Figure 2 As shown, in the method of this embodiment, the cylinder gasket 10 is provided with a water hole 14 in the nose bridge area of ​​the first cylinder, a water hole 15 in the nose bridge area of ​​the second cylinder, and a water hole 16 in the nose bridge area of ​​the third cylinder on the exhaust side close to the engine.

[0030] The flow rates of the water hole 14 in the nose bridge area of ​​the first cylinder, the water hole 15 in the nose bridge area of ​​the second cylinder, the water hole 16 in the nose bridge area of ​​the third cylinder, the water hole 12 between the first and second cylinders, and the water hole 13 between the second and third cylinders are strictly controlled through calculation, with the purpose of ensuring that the total flow rate accounts for less than 50% of the flow rate of the cylinder head water jacket, so that the cylinder body has a faster heating speed and avoids uneven internal temperature.

[0031] like Figure 1 As shown, in the method of this embodiment, a cylinder head water jacket water inlet 17 is provided at the bottom of the cylinder head water jacket 1, and the cylinder head water jacket water inlet 17 is connected with the cylinder head water jacket upper water hole 11 on the cylinder gasket 10. When the engine starts to work, the corresponding water hole on the cylinder block transmits the coolant, passes through the cylinder head water jacket upper water hole 11 on the cylinder gasket 10, along the cylinder head water jacket water inlet 17 on the cylinder head water jacket 1, and finally discharges the coolant through the water outlet 5, forming a branch water channel.

[0032] like Figure 2 As shown, in the method of this embodiment, the straight water channel 6 of the cylinder head water jacket 1 is connected to the corresponding part of the nose bridge area, one end of which is connected to the cylinder head water jacket 1, and the other end is connected to the upper water hole 14 of the nose bridge area of ​​the first cylinder, the upper water hole 15 of the nose bridge area of ​​the second cylinder, and the upper water hole 16 of the nose bridge area of ​​the third cylinder on the cylinder gasket 10, forming multiple circulation water channels.

[0033] like Figure 1 As shown, in the method of this embodiment, the exhaust port 4 is divided into two branches, and the exhaust gas from the two exhaust branches is discharged through the same exhaust pipe, the same muffler and the same exhaust tail pipe. This arrangement is called a dual exhaust system. The dual exhaust system reduces the pressure in the exhaust system, making the engine exhaust smoother, and less residual exhaust gas in the cylinder, so that more air-fuel mixture or clean air can be filled, and the power and torque of the engine are correspondingly improved.

[0034] like Figure 1 As shown, in the method of this embodiment, the sealing ring 9 is an "O" type sealing ring, made of fluororubber, with an operating temperature of -20℃ to 200℃, high temperature resistance, long-term use below 200℃, and short-term high temperature resistance above 300℃; acid and alkali resistance, oil resistance, radiation resistance, high vacuum resistance; electrical insulation, mechanical properties, chemical corrosion resistance, ozone resistance, atmospheric aging resistance are all excellent. It is non-flammable and belongs to self-extinguishing rubber.

[0035] like Figure 1 As shown, in this embodiment, the material of the sealing ring 9 can also be EPDM, which has an operating temperature of -40°C to 150°C, good aging resistance, ozone resistance, UV resistance, and weather resistance. It has excellent electrical insulation, chemical resistance, good impact elasticity, and acid and alkali resistance. It is super water-resistant, resistant to superheated water and water vapor. It can resist polar solvents such as ketones and esters, and has good elasticity and resistance to compression deformation.

[0036] Furthermore, the material of the sealing ring 9 in the present embodiment can also be selected from silicone rubber, which has an operating temperature of -60°C to 210°C, is resistant to both high and low temperatures, has excellent electrical insulation, high stability, and high chemical inertness. It has a hydrophobic surface and physiological inertness, is harmless to the human body, and has high air permeability.

[0037] like Figure 1 As shown, in the method of this embodiment, when the engine water circuit is in working state, multiple branch water circuits participate in the delivery of coolant at the same time, wherein water flows from the cylinder block into the cylinder head water jacket 1, flows into the cylinder head water jacket 1 through the cylinder head water jacket upper water hole 11 on the cylinder gasket 10 and the cylinder head water jacket water inlet 17 on the cylinder head water jacket 1, and finally flows out of the cylinder head water jacket 1 along the water outlet 5 provided in the cylinder head water jacket 1. The branch flow gathers other branch flows that complete the cooling task in the cylinder head water jacket 1. After cooling the cylinder, the temperature of the branch flow rises, and after gathering, it may cause damage to the water outlet 5 and the connected pipes. Cooling it and discharging it can reduce the damage to the pipes.

[0038] like Figure 1 As shown, in the method of this embodiment, when the engine water circuit is in working state, multiple branch water circuits are simultaneously involved in the delivery of coolant, wherein the coolant enters the straight water channel in the cylinder head water jacket 1 from the cylinder block along the water hole 14 in the cylinder nose bridge area on the cylinder gasket 10 to cool the exhaust pipe. In the cylinder head water jacket 1, the coolant cools the outer wall of the pipe of the exhaust port 4 along the "W"-shaped water channel 7, fully contacts with the pipe in the cylinder head water jacket 1 along the "W"-shaped water channel 7, and finally flows out along the water outlet in the cylinder head water jacket 1.

[0039] like Figure 1 As shown, in the method of this embodiment, the "W"-shaped water channel 7 is mainly surrounded by multiple exhaust ports, and the water channel is narrow. Therefore, when the coolant enters the cylinder head water jacket 1, the cooling water flow can fully contact the heat pipe. The advantage of this is that the cooling efficiency of the coolant is greatly improved, and the problem of uneven heating of the coolant is also prevented.

[0040] like Figure 1 As shown, in the method of this embodiment, when the engine water circuit is in working state, multiple branch water circuits are simultaneously involved in the delivery of coolant, wherein the coolant enters the straight water channel 6 in the cylinder head water jacket 1 from the cylinder block along the upper water hole 15 in the second cylinder nose bridge area on the cylinder gasket 10 to cool the exhaust pipe. In the cylinder head water jacket 1, the coolant cools the outer wall of the pipe of the exhaust port 4 along the "W"-shaped water channel, fully contacts with the pipe in the cylinder head water jacket 1 along the "W"-shaped water channel, and finally flows out along the water outlet in the cylinder head water jacket 1.

[0041] like Figure 1As shown, in the method of this embodiment, when the engine water circuit is in working state, multiple branch water circuits are simultaneously involved in the delivery of coolant, wherein the coolant enters the straight water channel in the cylinder head water jacket 1 from the cylinder block along the upper water hole 16 in the three-cylinder nose bridge area on the cylinder gasket 10 to cool the exhaust pipe. In the cylinder head water jacket 1, the coolant cools the outer wall of the pipe of the exhaust port 4 along the "W"-shaped water channel 7, fully contacts with the pipe in the cylinder head water jacket 1 along the "W"-shaped water channel 7, and finally flows out along the water outlet in the cylinder head water jacket 1.

[0042] The present invention is not limited to the specific technical solutions described in the above embodiments. In addition to the above embodiments, the present invention may also have other implementation modes. For those skilled in the art, any technical solutions formed by any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An engine water circuit, characterized in that: The front end of a cylinder head water jacket (1) is provided with a chain guide chamber (2) and a cylinder head (3); the exhaust side of the cylinder head (3) is provided with an exhaust port (4); a water outlet (5) is provided between the chain guide chamber (2) and the exhaust side of the cylinder; and a plurality of straight water channels (6) are provided inside the cylinder head water jacket (1).

2. The engine water circuit according to claim 1, characterized in that: The cylinder head water jacket (1) is internally provided with 3 to 4 "W"-shaped water channels (7), the "W"-shaped water channels (7) are tightly fitted with the outer wall of the pipe of the exhaust port (4), and the number of the exhaust port (4) is consistent with the number of the "W"-shaped water channels (7).

3. The engine water circuit according to claim 2, characterized in that: The cylinder head (3) is provided with a water outlet cover (8), and a sealing ring (9) is provided between the water outlet cover (8) and the cylinder head (3).

4. The engine water circuit according to claim 2, characterized in that: A cylinder gasket (10) is arranged between the cylinder head water jacket (1) and the cylinder body, and a cylinder port (18) is arranged in the middle of the cylinder gasket (10), the number of which is consistent with the number of cylinders configured in the engine.

5. The engine water circuit according to claim 4, characterized in that: The cylinder gasket (10) is provided with a cylinder head water jacket upper water hole (11) near the front end of the cylinder head water jacket (1), and is provided with a first / second cylinder upper water hole (12) and a second / third cylinder upper water hole (13) near the air intake side of the engine.

6. The engine water circuit according to claim 5, characterized in that: The cylinder gasket (10) is provided with a nose bridge area water hole near the engine exhaust side, which is arranged in order to include the nose bridge area water hole (14) of the first cylinder, the nose bridge area water hole (15) of the second cylinder, and the nose bridge area water hole (16) of the third cylinder.

7. The engine water circuit according to claim 5 or 6, characterized in that: The cylinder head water jacket (1) is provided with a cylinder head water jacket water inlet (17) at the bottom, and the cylinder head water jacket water inlet (17) is communicated with the cylinder head water jacket upper water hole (11) on the cylinder gasket (10).

8. The engine water circuit according to claim 6, characterized in that: The straight water channel (6) is connected to a portion corresponding to the nose bridge area, and one end is connected to the cylinder head water jacket (1), and the other end is connected to the water hole in the nose bridge area on the cylinder gasket (10).

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