Novel gasoline engine cooling water jacket

Abstract

The invention provides a novel gasoline engine cooling water jacket which comprises a cylinder body water jacket internally provided with a cylinder body water channel, a cylinder head water jacket arranged on the cylinder body water jacket and internally provided with a cylinder head water channel, and a water inlet communicated with the cylinder body water channel is formed in the cylinder body water jacket. A first water outlet hole and a second water outlet hole which are communicated with the cylinder body water channel are formed in the top face of the cylinder body water jacket, a water outlet communicated with the cylinder head water channel is formed in the cylinder head water jacket, and a first water inlet hole and a second water inlet hole which are communicated with the cylinder head water channel are formed in the bottom face of the cylinder head water jacket. A first flow control valve is arranged between the first water outlet hole and the first water inlet hole, a second flow control valve is arranged between the second water outlet hole and the second water inlet hole, and the circulation caliber of the second flow control valve is larger than that of the first flow control valve. According to the novel gasoline engine cooling water jacket, cooling as required is achieved through cooperation of structural design and flow adjustment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gasoline engines, in particular to a novel cooling jacket for gasoline engines. BACKGROUND

[0002] A gasoline engine is an engine that uses gasoline as fuel and converts internal energy into kinetic energy. During the operation of a gasoline engine, components such as the cylinder head and cylinder block generate a large amount of heat due to fuel combustion. If the heat is not dissipated in a timely and effective manner, the temperature of the components will be too high, which will not only reduce the power performance and fuel economy of the gasoline engine, but also may cause deformation and damage of the components, thereby seriously affecting the service life and operational reliability of the gasoline engine.

[0003] A cooling jacket is a core component of the cooling system of a gasoline engine. Through the circulation of coolant, heat exchange is achieved to maintain the stable operation of the gasoline engine in a high-temperature environment. The coolant uniformly flows in the cooling jacket to conduct the heat generated in the combustion chamber and the inner wall of the cylinder block to the outside, thereby preventing the gasoline engine from overheating.

[0004] The prior art has the following defects: the thermal loads of different parts of a gasoline engine differ significantly when the engine is in operation. For example, the "bridge area" between the cylinder head and the exhaust valve and the area around the exhaust port have very high thermal loads because they directly contact high-temperature combustion gas, while the thermal loads of the lower part of the cylinder barrel and other areas are relatively low. The traditional cooling jacket design usually adopts a continuous cavity. After the coolant enters from the water inlet, it is distributed by relying on its own flow characteristics. However, it often flows to the path with smaller resistance, and it is difficult to distribute the flow according to the actual heat dissipation requirements of each area. SUMMARY

[0005] The present application aims to solve the problem of the prior art that the flow of coolant is difficult to distribute as needed.

[0006] The above-mentioned application object of the present application is achieved by the following technical solution: a novel cooling jacket for a gasoline engine, comprising a cylinder block jacket having a cylinder block water channel inside, and a cylinder head jacket arranged on the cylinder block jacket and having a cylinder head water channel inside, a water inlet is formed on the cylinder block jacket and communicates with the cylinder block water channel, a first water outlet hole and a second water outlet hole are formed on the top surface of the cylinder block jacket and communicate with the cylinder block water channel, a water outlet is formed on the cylinder head jacket and communicates with the cylinder head water channel, a first water inlet hole and a second water inlet hole are formed on the bottom surface of the cylinder head jacket and communicate with the cylinder head water channel, a first flow control valve is arranged between the first water outlet hole and the first water inlet hole, a second flow control valve is arranged between the second water outlet hole and the second water inlet hole, and the flow passage diameter of the second flow control valve is larger than that of the first flow control valve.

[0007] The application is further provided with: the first flow control valve comprises a valve body with a valve cavity, an elastic check member arranged in the valve cavity and abutting against the cavity wall of the valve cavity, a first flow limiting hole opened upward on the bottom surface of the valve body, a second flow limiting hole with a smaller flow area than the first flow limiting hole and communicated with the valve cavity, a support seat arranged in the valve cavity and abutting against the check member, and a plurality of connecting strips arranged between the support seat and the cavity wall of the valve cavity.

[0008] The application is further provided with: a plurality of flow limiting teeth are arranged on the hole wall of the first flow limiting hole, and part of the flow limiting teeth extend into the second flow limiting hole.

[0009] The application is further provided with: a fixing column is arranged on the hole bottom of the first flow limiting hole, a flow limiting ring of elastic material is sleeved on the fixing column, and an anti-falling ring is arranged on the lower end of the fixing column.

[0010] The application is further provided with: a bottom connecting groove is opened on the bottom wall of the valve cavity, a bottom connecting column is arranged on the bottom wall of the check member and inserted into the bottom connecting groove, a top connecting groove is opened on the end surface of the support seat facing the check member, and a top connecting column is arranged on the end surface of the check member facing the support seat and inserted into the top connecting groove.

[0011] The application is further provided with: a conical surface is arranged on the outer side wall of the support seat, and the conical surface of the support seat can abut against the check surface of the check member.

[0012] The application is further provided with: a lower connecting block is arranged on the valve body and inserted into the first water outlet hole in an interference fit, the lower connecting block has a lower through hole communicated with the first flow limiting hole, an upper connecting block is arranged on the valve body and inserted into the first water inlet hole in an interference fit, and the upper connecting block has an upper through hole communicated with the valve cavity.

[0013] The application is further provided with: the second flow control valve comprises a valve seat and a plurality of valve units, the valve seat is inserted into the second water outlet hole in an interference fit, a tapered threaded hole and a water passage are sequentially opened downward on the top surface of the valve seat, the valve unit comprises an outer shell screwed with the threaded hole, a tapered positioning groove, an inner cavity and a liquid outlet hole are sequentially opened upward on the bottom surface of the outer shell, a bushing is embedded in the bottom of the inner cavity in an interference fit, a sealing gasket is arranged in the middle of the bushing, the middle of the sealing gasket has a liquid inlet hole, a sealing ring is arranged on the top surface of the sealing gasket, a valve disc is slidably arranged in the inner cavity, and a check spring is arranged in the inner cavity and used to push the valve disc to block the liquid inlet hole and abut against the sealing ring.

[0014] The application is further provided with: a disc cavity is opened on the top surface of the valve disc, a spring seat is arranged on the top wall of the inner cavity, a spring groove is opened on the spring seat, the upper end of the check spring is embedded in the spring groove, and the lower end of the check spring is inserted into the disc cavity.

[0015] The inner cavity is fixedly connected with a sliding rail on the cavity wall, and the outer side wall of the valve disc is fixedly connected with a boss, and a sliding groove is formed in the boss and slidably connected with the sliding rail.

[0016] To sum up, the beneficial technical effects of the present application are: (1) The new gasoline engine cooling jacket realizes "on-demand cooling" through the cooperation of "structure design + flow regulation", specifically as follows: according to the thermal load difference of different regions of the cylinder head, first flow control valves and second flow control valves with different flow diameters are arranged between the cylinder body water jacket and the cylinder head water jacket, so that the peak heat load area obtains "large flow + fast flow speed" (strong cooling), and the low heat load area obtains "small flow + slow flow speed" (moderate cooling), and the first flow control valve and the second flow control valve realize the "directional distribution" of the cooling liquid, so that the cooling capacity is accurately focused on the most needed area, which not only ensures the safety of the key parts of the engine (to avoid overheating), but also reduces unnecessary energy waste and improves the overall thermal efficiency; (2) The first flow control valve and the second flow control valve with the non-return function are arranged in the new gasoline engine cooling jacket, on the one hand, to avoid the backflow of high-temperature cooling liquid in the cylinder head water jacket into the cylinder body water jacket, and on the other hand, to avoid "flow distribution disorder", and to maintain a stable "positive pressure gradient" through one-way conduction, so as to ensure that the cooling liquid flowing through the first flow control valve and the second flow control valve can be accurately converted into "positive flow of the corresponding area" and not easily disturbed by reverse flow. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is an exploded structural schematic view of the new gasoline engine cooling jacket in the present application; Figure 2 is a structural schematic view of the cylinder head water jacket in the present application; Figure 3 is an exploded structural schematic view of the first flow control valve in the present application; Figure 4 is a sectional view of the first flow control valve in the present application; Figure 5 is an exploded structural schematic view of the second flow control valve in the present application; Figure 6 is a sectional view of the valve unit in the present application; Figure 7 is an exploded structural schematic view of the valve unit in the present application; Figure 8 is a structural schematic view of the shell in the present application.

[0018] In the above attached figures: 1. Cylinder body water jacket; 2. Water inlet; 3. First water outlet; 4. Second water outlet; 5. Cylinder head water jacket; 6. Water outlet; 7. First water inlet; 8. Second water inlet; 9. First flow control valve; 10. Valve body; 101. Valve cavity; 11. Primary flow limiting orifice; 12. Secondary flow limiting orifice; 13. Flow limiting tooth; 14. Fixing post; 15. Flow limiting ring; 16. Anti-detachment ring; 17. Bottom connecting groove; 18. Check valve; 181. Pressure surface; 182. Check surface; 19. Bottom connecting post; 20. Support base; 21. Top connecting groove; 22. Top connecting post; 23. Connecting... 24. Connecting bar; 25. Lower connecting block; 26. Lower through hole; 27. Upper connecting block; 28. Upper through hole; 29. ​​Second flow control valve; 30. Valve seat; 31. Threaded hole; 32. Water passage hole; 33. Valve unit; 34. Housing; 35. Positioning groove; 36. Inner cavity; 37. Liquid outlet hole; 38. Bushing; 39. Positioning flange; 40. Sealing gasket; 41. Connecting ring groove; 42. Connecting convex ring; 43. Sealing ring; 44. Spring seat; 45. Spring groove; 46. Slide rail; 47. Valve disc; 48. Boss; 49. Slide groove; 50. Disc cavity; 51. Check spring; 52. Sealing ring. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this invention clearer and easier to understand, the invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0020] like Figure 1 As shown, the present invention proposes a novel gasoline engine cooling water jacket, including a cylinder block water jacket 1 and a cylinder head water jacket 5 disposed on the cylinder block water jacket 1.

[0021] like Figure 1 As shown, the cylinder block water jacket 1 is used to cool the cylinder block of a gasoline engine. The cylinder block water jacket 1 has cylinder block water channels for coolant flow. An inlet 2 communicating with the cylinder block water channels is provided on the cylinder block water jacket 1, through which coolant enters the cylinder block water channels. A first outlet hole 3 and a second outlet hole 4 communicating with the cylinder block water channels are provided on the top surface of the cylinder block water jacket 1. In this embodiment, there are two first outlet holes 3 and six second outlet holes 4.

[0022] like Figure 1 As shown, the cylinder head water jacket 5 is used to cool the cylinder head of the gasoline engine. The cylinder head water jacket 5 has a cylinder head water channel for coolant to flow through. The cylinder head water jacket 5 has an outlet 6 that communicates with the cylinder head water channel. After the coolant runs out of the cylinder head water channel through the outlet 6, it will enter the radiator to cool down. The cooled coolant will then circulate back to the inlet 2 to form a water cooling cycle.

[0023] like Figure 1 and 2As shown, the bottom surface of the cylinder head water jacket 5 is provided with first water inlet holes 7 and second water inlet holes 8 which are in communication with the cylinder head water channels, two first water inlet holes 7 are aligned above two first water outlet holes 3, the first water inlet holes 7 are close to the low heat load area of the gasoline engine cylinder head, six second water inlet holes 8 are aligned above six second water outlet holes 4, two second water inlet holes close to each other form a group, and the six second water inlet holes are divided into three groups which are distributed at intervals, and the three groups of second water inlet holes 8 are close to the three heat load peak areas of the gasoline engine cylinder head respectively.

[0024] As shown in Figure 1 , the first water outlet hole 3 and the first water inlet hole 7 are provided with a first flow control valve 9, and the second water outlet hole 4 and the second water inlet hole 8 are provided with a second flow control valve 28, the flow diameter of the second flow control valve 28 is larger than that of the first flow control valve 9, and the cooling liquid flow of the second flow control valve 28 is large (more cooling liquid passes per unit time), and the cooling effect of the corresponding area (heat load peak area) is strong (large flow, fast flow, high heat exchange efficiency).

[0025] As shown in Figure 3 and 4 , in this embodiment, the flow diameter of the first flow control valve 9 is DN30, and the first flow control valve 9 includes a valve body 10, and the bottom surface of the valve body 10 is upwardly provided with a primary flow limiting hole 11, a secondary flow limiting hole 12 and a valve cavity 101 which are sequentially communicated, the primary flow limiting hole 11 is a circular hole, the number of the secondary flow limiting hole 12 is eight, the eight secondary flow limiting holes 12 are equidistantly distributed in a circle, the secondary flow limiting hole 12 is a fan-shaped ring hole, and the flow area of the secondary flow limiting hole 12 is smaller than that of the primary flow limiting hole 11.

[0026] In this embodiment, when the first flow control valve 9 works, the cooling liquid sequentially flows through the primary flow limiting hole 11 and the secondary flow limiting hole 12, and since the flow area of the secondary flow limiting hole 12 is smaller than that of the primary flow limiting hole 11, when the cooling liquid flows from the primary flow limiting hole 11 as a large hole into the secondary flow limiting hole 12 as a small hole, the flow area is reduced and the resistance is increased, thereby forming a local pressure drop and achieving the effect of flow limiting, and the cooling liquid flow is correspondingly reduced.

[0027] As shown in Figure 3 and 4 , in this embodiment, the hole wall of the primary flow limiting hole 11 is fixedly connected with flow limiting teeth 13, and the number of the flow limiting teeth 13 is sixteen, of which eight flow limiting teeth 13 extend into the secondary flow limiting hole 12. In this embodiment, when the first flow control valve 9 works, the cooling liquid sequentially flows through the primary flow limiting hole 11 and the secondary flow limiting hole 12, and in this process, the cooling liquid will flow through the flow limiting teeth 13, and the flow limiting teeth 13 will increase the local resistance of the flow channel, thereby achieving the purpose of improving the flow limiting effect.

[0028] As shown in Figure 3 and 4As shown, the bottom center of the primary flow limiting hole 11 is fixedly connected with a cylindrical fixed column 14, and a flow limiting ring 15 is sleeved on the fixed column 14. The flow limiting ring 15 is made of elastic material, preferably rubber. The flow limiting ring 15 abuts against the bottom of the primary flow limiting hole 11 and partially blocks the eight secondary flow limiting holes 12. The lower end of the fixed column 14 is fixedly connected with an anti-disengagement ring 16. The anti-disengagement ring 16 is used to limit the separation of the fixed column 14 and the flow limiting ring 15, and to avoid the separation of the flow limiting ring 15 from the fixed column 14 due to the impact of high-pressure cooling liquid to a certain extent.

[0029] When the first flow control valve 9 works in this embodiment, the hydraulic pressure increases, the flow limiting ring 15 is deformed under pressure, which further causes the outer diameter of the flow limiting ring 15 to increase. The flow limiting ring 15 partially blocks the eight secondary flow limiting holes 12, the flow area of the secondary flow limiting holes 12 decreases, the resistance increases, and a pressure drop is formed locally, thereby achieving the purpose of improving the flow limiting effect. When the hydraulic pressure decreases, the elastic flow limiting ring 15 resets, the outer diameter of the flow limiting ring 15 decreases, the flow area of the secondary flow limiting holes 12 increases, and the resistance decreases, thereby achieving the purpose of reducing the flow limiting effect. The first flow control valve 9 achieves the purpose of dynamic flow limiting by setting the flow limiting ring 15.

[0030] As shown in Figure 3 and 4 , a bottom connecting groove 17 is formed in the center of the bottom wall of the valve cavity 101. The bottom connecting groove 17 is a circular groove, and the bottom connecting groove 17 extends into the fixed column 14. A check member 18 is arranged in the valve cavity 101. The bottom wall of the check member 18 is fixedly connected with a cylindrical bottom connecting column 19. The bottom connecting column 19 is inserted and matched with the bottom connecting groove 17.

[0031] As shown in Figure 3 and 4 , the check member 18 is bowl-shaped and made of elastic material, preferably rubber. In the initial state, the edge of the check member 18 is in close contact with the cavity wall of the valve cavity 101. The check member 18 has a pressure receiving surface 181 facing the secondary flow limiting holes 12 and a check surface 182 facing away from the secondary flow limiting holes 12.

[0032] When the first flow control valve 9 works in this embodiment, the high-pressure cooling liquid impacts on the pressure receiving surface 181 of the check surface 182, and the check member 18 deforms inwardly to form a gap between the check member 18 and the cavity wall of the valve cavity 101 for the cooling liquid to pass through. When the cooling liquid backflows, it impacts on the check surface 182 of the check member 18, which tends to deform outwardly. The edge of the check member 18 is in close contact with the cavity wall of the valve cavity 101 to limit the backflow of the cooling liquid.

[0033] As shown in Figure 3 and 4As shown, a support seat 20 is arranged at the center of the valve cavity 101, and is located on the side of the check member 18 away from the secondary flow limiting hole 12. A circular top connecting groove 21 is formed on the end face of the support seat 20 facing the check member 18. A cylindrical top connecting column 22 is arranged on the end face of the check member 18 facing the support seat 20, and is inserted into the top connecting groove 21. Four connecting strips 23 are arranged between the support seat 20 and the cavity wall of the valve cavity 101, and are distributed in equal distance on the circumference of the central axis of the support seat 20. The space between the four connecting strips 23 forms a flow channel for the cooling liquid.

[0034] When the first flow control valve 9 is in operation in this embodiment, the bottom connecting column 19 of the check member 18 is inserted into the bottom connecting groove 17, the top connecting column 22 of the check member 18 is inserted into the top connecting groove 21, and the check member 18 is fixed between the valve body 10 and the support seat 20. When the check member 18 is impacted by the high-pressure cooling liquid, the support seat 20 can improve the impact resistance of the check member 18, so that the check member 18 is not easily impacted out of the valve cavity 101, and the first flow control valve 9 is not easily in the situation of check failure.

[0035] The outer side wall of the support seat 20 has a tapered surface, and the tapered surface of the support seat 20 can abut against the check surface 182 of the check member 18. When the first flow control valve 9 is in operation in this embodiment, the high-pressure cooling liquid impacts on the pressure receiving surface 181 of the check surface 182, and the check member 18 deforms inwardly until the check surface 182 of the check member 18 abuts against the tapered surface of the support seat 20. At this time, the check member 18 is difficult to continue to deform inwardly, so that the check member 18 can be prevented from being damaged due to long-time excessive deformation.

[0036] As shown in Figure 3 and 4 The bottom surface of the valve body 10 is fixedly connected with a lower connecting block 24, the lower connecting block 24 is inserted into the first water outlet hole 3 in interference fit, and the lower connecting block 24 has a lower through hole 25 in communication with the primary flow limiting hole 11. The top surface of the valve body 10 is fixedly connected with an upper connecting block 26, the upper connecting block 26 is inserted into the first water inlet hole 7 in interference fit, and the upper connecting block 26 has an upper through hole 27 in communication with the valve cavity 101.

[0037] As shown in Figure 1 and 5 The second flow control valve 28 includes a valve seat 29 and a plurality of valve units 32. The valve seat 29 is a stepped plate body, is inserted into the second water outlet hole 4 in interference fit, and has a threaded hole 30 and a water passage hole 31 sequentially formed downwardly on the top surface of the valve seat 29.

[0038] As shown in Figure 1 and 5As shown, in this embodiment, the flow passage diameter of the valve unit 32 is DN50, and the flow passage diameter of the valve unit 32 is greater than that of the first flow control valve 9. The valve unit 32 includes a cylindrical shell 33, the bottom of the shell 33 has external threads, the shell 33 is threadedly connected to the threaded hole 30 of the valve seat 29 through the external threads, and the top of the shell 33 is interference-fitted with the second water inlet hole 8.

[0039] As shown in Figure 6 and 7 The bottom surface of the shell 33 is sequentially provided with a positioning groove 34, an inner cavity 35, and a liquid outlet hole 36 upwardly, the bottom of the inner cavity 35 is interference-fitted with a circular annular bushing 37, the bushing 37 is sleeved with a sealing ring 51, the sealing ring 51 forms a seal between the bushing 37 and the shell 33, and the outer side wall of the bushing 37 is fixedly connected with a positioning flange 38 which is embedded with the positioning groove 34. The middle part of the bushing 37 is provided with a sealing gasket 39, the outer side wall of the sealing gasket 39 is circumferentially provided with a connecting ring groove 40, and the inner wall of the bushing 37 is fixedly connected with a connecting convex ring 41 which is embedded with the connecting ring groove 40. The middle part of the sealing gasket 39 has a circular liquid inlet hole, and the top surface of the sealing gasket 39 is fixedly connected with a sealing ring 42.

[0040] As shown in Figure 6 and 8 The top wall of the inner cavity 35 is fixedly connected with a spring seat 43, the spring seat 43 is provided with a spring groove 44, and the cavity wall of the inner cavity 35 is fixedly connected with a sliding rail 45. The center of the inner cavity 35 is slidingly provided with a valve flap 46, the outer side wall of the valve flap 46 is fixedly connected with a boss 47, and the boss 47 is provided with a sliding groove 48 which is slidingly matched with the sliding rail 45. The top surface of the valve flap 46 is provided with a flap cavity 49, a check spring 50 is arranged between the spring seat 43 and the valve flap 46, the upper end of the check spring 50 is embedded in the spring groove 44, the lower end of the check spring 50 is inserted into the flap cavity 49, and the check spring 50 is used to push the valve flap 46 to block the liquid inlet hole and abut against the sealing ring 42.

[0041] The essence of the design of the new gasoline engine cooling jacket is "distributing cooling capacity on demand", and the design basis is the thermal load imbalance of different parts of the gasoline engine: 1. The cylinder mainly bears the mechanical load of the piston reciprocating motion and the friction heat of the cylinder wall, the overall temperature is relatively flat (usually 150-250℃), the cooling demand is relatively uniform, and the thermal load of the cylinder is low; 2. The cylinder head integrates the combustion chamber, spark plug, intake and exhaust valves and other core components, the top of the combustion chamber and around the exhaust valve are the peak area of thermal load (temperature can reach 300-500℃), the high temperature generated by combustion directly acts on it, and the exhaust valve continuously discharges high-temperature exhaust gas, and the heat is seriously accumulated; 3. The edge of the cylinder head and around the intake valve is the trough area of thermal load, the intake valve will introduce low-temperature fresh mixture, take away part of the heat, and the temperature is relatively low (usually 200-300℃).

[0042] Therefore, the core requirement of the cooling jacket is to ensure the cooling of the peak heat load area of the cylinder head, while avoiding excessive cooling in the valley area (reducing heat waste and avoiding local dew formation).

[0043] The flow path of the cooling liquid: 1. The cooling liquid (usually a glycol water solution) is injected from the water inlet 2 of the cylinder jacket 1, first filling the cylinder jacket 1, and then performing preliminary and uniform cooling of the cylinder (meeting the lower and uniform heat load requirements of the cylinder); 2. One of the communication paths of the cooling liquid is the first water outlet hole 3, the first flow control valve 9, and the first water inlet hole 7, and the other communication path is the second water outlet hole 4, the second flow control valve 28, and the second water inlet hole 8; 3. After the cooling liquid runs out of the cylinder head waterway through the water outlet 6, it will enter the radiator to be cooled, and the cooled cooling liquid will be circulated back to the water inlet 2, forming a water cooling cycle.

[0044] The cooling capacity of the cooling liquid (the efficiency of removing heat) mainly depends on the flow rate and flow speed, which are directly related to the heat load requirements: 1. The first flow control valve 9 is set near the low heat load area (such as the edge of the cylinder head and the vicinity of the intake valve), and the flow diameter of the first flow control valve 9 is small → the flow resistance is large → the flow rate is small (reducing cooling liquid waste), the flow speed is slow (the heat exchange intensity is moderate) → only a suitable amount of heat is removed, avoiding excessive cooling that leads to energy loss, while preventing local temperature from being too low to cause dew formation (water + fuel vapor may cause corrosion); 2. The second flow control valve 28 is set near the peak heat load area (such as the exhaust valve and the top of the combustion chamber), and the flow diameter of the second flow control valve 28 is large → the flow resistance is small → the flow rate is large (more cooling liquid participates in heat exchange), the flow speed is fast (the faster the flow speed, the more intense the heat exchange between the cooling liquid and the cylinder head wall) → a large amount of heat is quickly removed, avoiding local overheating.

[0045] The new cooling jacket for gasoline engines achieves "on-demand cooling" through the synergy of "structure design + flow regulation", as follows: According to the heat load differences in different areas of the cylinder head, the first flow control valve 9 and the second flow control valve 28 with different flow diameters are set between the cylinder jacket 1 and the cylinder head jacket 5, so that the peak heat load area obtains "large flow rate + fast flow speed" (strong cooling), and the low heat load area obtains "small flow rate + slow flow speed" (moderate cooling), the first flow control valve 9 and the second flow control valve 28 realize the "directional distribution" of the cooling liquid, and the cooling capacity is accurately focused on the areas that need it most, ensuring the safety of the key parts of the engine (avoiding overheating), reducing unnecessary energy waste, and improving the overall thermal efficiency.

[0046] The first flow control valve 9 and the second flow control valve 28 with the non-return function are arranged in the novel cooling water jacket of the gasoline engine, on the one hand, the high-temperature cooling liquid in the cylinder head water jacket 5 is prevented from flowing backward into the cylinder block water jacket 1, and the cooling effect of the cylinder block is weakened, on the other hand, the "flow distribution disorder" is avoided, the stable "positive pressure gradient" is maintained through the one-way conduction, and it is ensured that the cooling liquid flowing through the first flow control valve 9 and the second flow control valve 28 can be accurately converted into the "positive flow of the corresponding area" and is not easily disturbed by the reverse flow.

[0047] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A novel gasoline engine cooling water jacket, characterized in that: The system includes a cylinder water jacket (1) with an internal cylinder water channel and a cylinder head water jacket (5) installed on the cylinder water jacket (1) and having an internal cylinder head water channel. The cylinder water jacket (1) has an inlet (2) that communicates with the cylinder water channel. The top surface of the cylinder water jacket (1) has a first outlet (3) and a second outlet (4) that communicate with the cylinder water channel. The cylinder head water jacket (5) has an outlet (6) that communicates with the cylinder head water channel. The bottom surface of the cylinder head water jacket (5) has a first inlet (7) and a second inlet (8) that communicate with the cylinder head water channel. A first flow control valve (9) is installed between the first outlet (3) and the first inlet (7). A second flow control valve (28) is installed between the second outlet (4) and the second inlet (8). The flow diameter of the second flow control valve (28) is larger than the flow diameter of the first flow control valve (9).

2. The novel gasoline engine cooling water jacket according to claim 1, characterized in that: The first flow control valve (9) includes a valve body (10) having a valve cavity (101) and an elastic check valve (18) disposed in the valve cavity (101) and whose edge abuts against the cavity wall of the valve cavity (101). The bottom surface of the valve body (10) is provided with a first-level flow limiting hole (11) connected in sequence and a second-level flow limiting hole (12) with a flow area smaller than the first-level flow limiting hole (11) and connected to the valve cavity (101). A support seat (20) that abuts against the check valve (18) is provided in the valve cavity (101). Several connecting strips (23) are provided between the support seat (20) and the cavity wall of the valve cavity (101).

3. A novel gasoline engine cooling water jacket according to claim 2, characterized in that: The primary flow-limiting orifice (11) has several flow-limiting teeth (13) on its orifice wall, and some of the flow-limiting teeth (13) extend into the secondary flow-limiting orifice (12).

4. A novel gasoline engine cooling water jacket according to claim 2, characterized in that: A fixing post (14) is provided on the bottom of the primary flow limiting hole (11), and a flow limiting ring (15) of elastic material is sleeved on the fixing post (14). An anti-detachment ring (16) is provided at the lower end of the fixing post (14).

5. A novel gasoline engine cooling water jacket according to claim 2, characterized in that: The bottom wall of the valve cavity (101) is provided with a bottom connecting groove (17), the bottom wall of the check member (18) is provided with a bottom connecting post (19) that is inserted into the bottom connecting groove (17), the end face of the support base (20) facing the check member (18) is provided with a top connecting groove (21), and the end face of the check member (18) facing the support base (20) is provided with a top connecting post (22) that is inserted into the top connecting groove (21).

6. A novel gasoline engine cooling water jacket according to claim 2, characterized in that: The outer wall of the support (20) has a tapered surface, which can abut against the anti-reverse surface (182) of the anti-reverse member (18).

7. A novel gasoline engine cooling water jacket according to claim 2, characterized in that: The valve body (10) is provided with a lower connecting block (24) that is interference-fitted to the first water outlet (3). The lower connecting block (24) has a lower through hole (25) that communicates with the first flow limiting hole (11). The valve body (10) is provided with an upper connecting block (26) that is interference-fitted to the first water inlet (7). The upper connecting block (26) has an upper through hole (27) that communicates with the valve cavity (101).

8. A novel gasoline engine cooling water jacket according to claim 1, characterized in that: The second flow control valve (28) includes a valve seat (29) and several valve units (32). The valve seat (29) is interference-fitted with the second water outlet (4). The top surface of the valve seat (29) is provided with a tapered threaded hole (30) and a water passage hole (31) in sequence. The valve unit (32) includes a housing (33) threadedly connected to the threaded hole (30). The bottom surface of the housing (33) is provided with a tapered positioning groove (34), an inner cavity (35), and an outlet in sequence. A bushing (37) is interference-fitted into the bottom of the inner cavity (35) of the liquid hole (36). A sealing gasket (39) is provided in the middle of the bushing (37). The sealing gasket (39) has a liquid inlet hole in the middle. A sealing ring (42) is provided on the top surface of the sealing gasket (39). A valve disc (46) is slidably provided in the inner cavity (35). A check spring (50) is provided in the inner cavity (35) for pushing the valve disc (46) to block the liquid inlet hole and press against the sealing ring (42).

9. A novel gasoline engine cooling water jacket according to claim 8, characterized in that: The valve disc (46) has a valve cavity (49) on its top surface. A spring seat (43) is provided on the top wall of the inner cavity (35). A spring groove (44) is provided on the spring seat (43). The upper end of the anti-reverse spring (50) is embedded in the spring groove (44), and the lower end of the anti-reverse spring (50) is inserted into the valve cavity (49).

10. A novel gasoline engine cooling water jacket according to claim 8, characterized in that: A slide rail (45) is fixedly connected to the cavity wall of the inner cavity (35), and a boss (47) is fixedly connected to the outer wall of the valve disc (46). A groove (48) is provided on the boss (47) to slide and cooperate with the slide rail (45).

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