Heavy-duty engine cooling system equipped with smart thermal management valve and liquid buffer tube

Abstract

The utility model relates to a kind of high-power engine cooling system equipped with intelligent thermal management valve and liquid buffer pipe, including water pump inlet pipe, water pump, oil cooler, intelligent thermal management valve, hydraulic retarder water pipe, hydraulic retarder backwater pipe, whole vehicle accessory inlet pipe, whole vehicle accessory backwater pipe, degassing connector, engine outlet pipe, small circulation bypass pipe.The utility model accurately controls water temperature, makes water flow change smooth transition, and makes water temperature and water pressure basically tend to stable state;Reduce fuel consumption;Improve the cooling liquid flow of hydraulic retarder.

Description

Technical Field

[0001] This utility model relates to the field of automotive engine cooling system technology, specifically to a high-horsepower engine cooling system equipped with an intelligent thermal management valve and a liquid retarder. Background Technology

[0002] Traditional wax-type thermostats have a large opening / closing temperature error and significant water temperature fluctuations, which are detrimental to engine fuel economy. Significant water pressure variations can also negatively impact water pipe sealing, and vibrations can reduce the lifespan of the water pipes. Utility Model Content

[0003] This invention addresses the aforementioned problems by providing a high-horsepower engine cooling system equipped with an intelligent thermal management valve and a hydraulic retarder. Its purpose is to precisely control the water temperature, ensure smooth transitions in water flow rate, and maintain a relatively stable water temperature and pressure; reduce fuel consumption; and increase the coolant flow rate of the hydraulic retarder.

[0004] To solve the above problems, the technical solution provided by this utility model is as follows: A high-horsepower engine cooling system equipped with an intelligent thermal management valve and a hydraulic retarder pipe includes a water pump inlet pipe, a water pump, an oil cooler, an intelligent thermal management valve, a hydraulic retarder water inlet pipe, a hydraulic retarder water return pipe, vehicle accessory water inlet pipes, vehicle accessory water return pipes, a venting connector, an engine water outlet pipe, and a small circulation bypass pipe, wherein: The water pump is connected to the water pump inlet pipe and the oil cooler respectively; the outlet of the oil cooler is connected to the engine block; the water intake end of the intelligent thermal management valve is connected to the outlet of the engine cylinder head, the water intake end of the hydraulic retarder is connected to the hydraulic retarder water intake pipe, and the return end of the hydraulic retarder is connected to the hydraulic retarder return pipe; the outlet of the intelligent thermal management valve is the engine outlet pipe, which is connected to the vehicle radiator; the vehicle accessory return pipe is connected to the water pump inlet pipe; one end of the degassing connector is connected to the highest point of the coolant passage of the intelligent thermal management valve, and the other end is connected to the vehicle expansion tank; the upper end of the small circulation bypass pipe is connected to the intelligent thermal management valve, and the lower end is connected to the water pump inlet pipe.

[0005] Preferably, the speed ratio of the water pump is 2.06.

[0006] Preferably, the heat dissipation capacity of the oil cooler is 70.4KW.

[0007] Preferably, the intelligent thermal management valve is a double ball valve, including a first water hole, a second water hole, a third water hole, and a fourth water hole, and the diameter of the throttle valve of the double ball valve is 90mm.

[0008] Preferably, the outer diameter of the return water pipe of the hydraulic retarder is 50 mm, the wall thickness is 1.2 mm, and the flow rate is 410 L / min @ 1700 RPM.

[0009] Preferably, the inner diameter of the degassing connector is 3.5 mm; the inner diameters of the vehicle accessory water inlet pipe and the vehicle accessory water return pipe are both 19.75 mm.

[0010] Preferably, the hydraulic retarder return water pipe is provided with a water inlet connector for supplying coolant to the vehicle accessories; the water inlet connector is connected to the vehicle accessory water inlet pipe.

[0011] Compared with the prior art, this utility model has the following advantages: 1. Because this utility model adopts the structure of an intelligent thermal management valve, it can accurately control the water temperature, make the water flow change smoothly, and make the water temperature and water pressure basically stable.

[0012] 2. Because this utility model adopts the structure of an intelligent thermal management valve, fuel consumption is reduced by 0.5-1%.

[0013] 3. Because this utility model uses a high-flow water pump, the coolant flow rate of the hydraulic retarder is greatly increased. Attached Figure Description

[0014] Figure 1 A schematic diagram of the overall layout of a high-horsepower engine cooling system equipped with an intelligent thermal management valve and a liquid buffer pipe, according to a specific embodiment of this utility model; Figure 2a This is a schematic diagram of the front view of the internal ball valve of the intelligent thermal management valve in a specific embodiment of this utility model; Figure 2b This is a schematic diagram of the rear view of the internal ball valve of the intelligent thermal management valve in a specific embodiment of this utility model; Figure 2c for Figure 2a Schematic diagram of the AA-direction section; Figure 2d for Figure 2a Schematic diagram of the cross-section in the BB direction; Figure 3a This is a top view schematic diagram of the intelligent thermal management valve connection structure in the small circulation state according to a specific embodiment of this utility model; Figure 3b for Figure 3a Schematic diagram of the cross-section in the CC direction; Figure 3c for Figure 3a Schematic diagram of the cross-section in the DD direction; Figure 4a This is a top view schematic diagram of the intelligent thermal management valve connection structure in the large circulation state according to a specific embodiment of this utility model; Figure 4b for Figure 4a Schematic diagram of the cross-section in the EE direction; Figure 4c for Figure 4a A schematic diagram of the cross-section in the FF direction; Figure 5a This is a top view schematic diagram of the intelligent thermal management valve connection structure in the liquid buffer open state according to a specific embodiment of this utility model; Figure 5b for Figure 5a Schematic diagram of the cross-section in the GG direction; Figure 5c for Figure 5a A schematic diagram of the cross-section along the HH direction; Figure 6a This is a front view schematic diagram of the layout of the vehicle accessory water pipe according to a specific embodiment of this utility model; Figure 6b This is a side view schematic diagram of the layout of the vehicle accessory water pipe according to a specific embodiment of this utility model.

[0015] The components are: 1. Water pump inlet pipe, 2. Water pump, 3. Engine oil cooler, 4. Intelligent thermal management valve, 5. Hydraulic retarder water inlet pipe, 6. Hydraulic retarder water return pipe, 7. Vehicle accessory water inlet pipe, 8. Vehicle accessory water return pipe, 9. Degassing connector, 10. Engine water outlet pipe, 11. Small circulation bypass pipe, 12. Water inlet connector, 13. Engine cylinder head, 14. Engine block, 4a. First water hole, 4b. Second water hole, 4c. Third water hole, 4d. Fourth water hole, 4f. Double ball valve, 15. Engine water outlet, 16. Small circulation water outlet chamber, 17. Ball valve water inlet, 18. Ball valve water outlet, 19. Hydraulic retarder water inlet chamber, 20. Hydraulic retarder water return chamber, 21. Cylinder head water outlet chamber. Detailed Implementation

[0016] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0017] This utility model application claims protection for a cooling system for a high-horsepower engine equipped with an intelligent thermal management valve and a liquid retarder, such as Figure 1 , Figure 6a , Figure 6b As shown, the system includes: water pump inlet pipe 1, water pump 2, oil cooler 3, intelligent thermal management valve 4, hydraulic retarder water inlet pipe 5, hydraulic retarder water return pipe 6, vehicle accessory water inlet pipe 7, vehicle accessory water return pipe 8, degassing connector 9, engine water outlet pipe 10, and small circulation bypass pipe 11. Water pump 2 is connected to water pump inlet pipe 1 and oil cooler 3 respectively; the outlet of oil cooler 3 is connected to engine block 14; the water intake end of intelligent thermal management valve 4 is connected to the outlet of engine cylinder head 13, the water intake end of hydraulic retarder is connected to hydraulic retarder water intake pipe 5, and the return end of hydraulic retarder is connected to hydraulic retarder return pipe 6; the outlet of intelligent thermal management valve 4 is engine outlet pipe 10, which is connected to vehicle radiator; vehicle accessory return pipe 8 is connected to water pump inlet pipe 1. One end of the degassing connector 9 is connected to the highest point of the coolant passage of the intelligent thermal management valve 4, and the other end is connected to the vehicle expansion tank; the upper end of the small circulation bypass pipe 11 is connected to the intelligent thermal management valve 4, and the lower end is connected to the water pump inlet pipe 1.

[0018] It should be noted that this utility model replaces the ordinary wax-type thermostat with an intelligent thermal management valve 4, and integrates the thermostat chamber with the intelligent thermal management valve 4. An engine ECU controls the actuator, which in turn controls the opening of the intelligent thermal management valve 4, adjusting the cooling path and flow rate to maintain the engine coolant temperature between 97 and 107°C.

[0019] In this specific embodiment, the speed ratio of water pump 2 is 2.06, which increases the flow rate of the cooling system of the whole machine and ensures that the cooling flow rate of the liquid buffer is ≥360L / min @ 1800RPM.

[0020] In this specific embodiment, the heat dissipation capacity of the oil cooler 3 is 70.4KW.

[0021] It should be noted that, as Figure 2a , 2b As shown in Figures 2c and 2d, the intelligent thermal management valve 4 adopts a double ball valve 4f, which includes a first water hole 4a, a second water hole 4b, a third water hole 4c, and a fourth water hole 4d. The diameter of the throttling valve of the double ball valve 4f is 90mm. The cooperation between the double ball valve 4f and the inlet and outlet is a line contact, minimizing friction and maximizing the lifespan of the ball valve and actuator.

[0022] In this specific embodiment, the outer diameter of the hydraulic retarder return water pipe 6 is 50mm, the wall thickness is 1.2mm, and the flow rate is 410L / min@1700 RPM.

[0023] It should be noted that air bubbles in the coolant travel to the vehicle's expansion tank through the degassing connector 9. The degassing connector 9 is located at the highest point of the cooling system to ensure complete degassing.

[0024] In this specific embodiment, the inner diameter of the degassing connector 9 is 3.5mm; the inner diameters of the vehicle accessory water inlet pipe 7 and the vehicle accessory water return pipe 8 are both 19.75mm, which meets the flow requirements of the vehicle accessories.

[0025] It should be noted that the hydraulic retarder return water pipe 6 is equipped with a water inlet connector 12 for supplying coolant to the vehicle accessories; the water inlet connector 12 is connected to the vehicle accessory inlet water pipe 7, and part of the coolant flows from the vehicle accessory inlet water pipe 7 into the vehicle accessories (SCR, automatic transmission, etc.), cools the vehicle accessories, and then flows back to the water pump inlet water pipe 1 from the vehicle accessory return water pipe 8 and enters the water pump 2.

[0026] It should be further explained that the vehicle accessory water inlet pipe 7 is located on the hydraulic retarder return water pipe 6, and the return water is sent to the water pump inlet pipe 1. This is a negative pressure zone, which can ensure the flow rate of water intake for the vehicle accessories.

[0027] A control method for a high-horsepower engine cooling system equipped with an intelligent thermal management valve and a liquid retarder, characterized by comprising the following steps: S1. Control water pump 2 to drive coolant to flow sequentially through oil cooler 3, engine block 14 and enter intelligent thermal management valve 4; S2. Monitor the coolant temperature in real time and control the intelligent thermal management valve 4 to switch between small circulation state, large circulation state and liquid buffer open state according to the preset judgment conditions. If the coolant temperature is lower than the preset temperature threshold and the hydraulic retarder is turned off, then proceed to step S3. If the coolant temperature is higher than the temperature threshold and the hydraulic retarder is closed, then proceed to step S4; If the hydraulic retarder is activated, proceed to step S5; S3. Control the intelligent thermal management valve 4 to switch to the small circulation state; control the small circulation outlet to be fully open, control the engine outlet to be fully closed, so that the coolant returns to the water pump inlet pipe 1 through the small circulation bypass pipe 11; S4. Control the intelligent thermal management valve 4 to switch to the large circulation state; control the small circulation outlet to close, control the engine outlet to fully open, so that the coolant enters the vehicle radiator through the engine outlet pipe 10; S5. Control the intelligent thermal management valve 4 to switch to the hydraulic retarder open state; control the hydraulic retarder to open, so that all the coolant enters the hydraulic retarder through the hydraulic retarder water intake pipe 5 and returns to the intelligent thermal management valve 4 through the hydraulic retarder return water pipe 6; at the same time, the actuator of the intelligent thermal management valve 4 drives the double ball valve 4f, so that the fourth water hole 4d faces the hydraulic retarder return water pipe 6 and the third water hole 4c faces the engine outlet water pipe 10.

[0028] It should be noted that the coolant of this invention is drawn into the water pump 2 from the water pump inlet pipe 1; after being pressurized, it enters the oil cooler 3; then enters the engine block 14, ascends from the water jacket to the engine cylinder head 13; after cooling the engine cylinder head 13, it enters the intelligent thermal management valve 4 from the front of the engine; from the ball valve inlet 17 of the intelligent thermal management valve 4, it enters the hydraulic retarder take-up pipe 5; after cooling the hydraulic retarder, it enters the ball valve outlet 18 of the intelligent thermal management valve 4 from the hydraulic retarder return pipe 6. When the water temperature is below 82℃, it returns to the water pump inlet 1 from the small circulation bypass pipe 11, is pressurized, and re-enters the oil cooler 3; when the water temperature is above 82℃, it enters the vehicle radiator from the engine outlet pipe 10; when the hydraulic retarder is open, the intelligent thermal management valve 4 prioritizes opening the large circulation channel according to the control conditions of the ECU; if no ECU instruction is received, it opens the large circulation channel according to whether the water temperature is above 82℃.

[0029] It should be further explained that the ECU issues the large circulation start command based on the hydraulic retarder oil temperature limit and coolant temperature limit provided by the vehicle. When either of these two parameters reaches the limit, the ECU instructs the intelligent thermal management valve to open the large circulation channel.

[0030] It needs to be further explained that, such as Figure 3a , 3b As shown in section DD, in the small circulation state of 3c, the coolant enters the ball valve directly from the cylinder head outlet chamber 21, and part of the coolant enters the ball valve from the slack return chamber 20. Then, all of the coolant enters the small circulation bypass pipe 11 from the small circulation outlet chamber 16 and flows into the water pump inlet pipe 1. As shown in section CC, at this time, the outlet of the small circulation outlet chamber 16 is fully open, and the engine outlet 15 is fully closed.

[0031] It needs to be further explained that, such as Figure 4a , 4b In the large circulation state shown in section FF, the coolant enters the ball valve directly from the cylinder head outlet chamber 21, and part of the coolant enters the ball valve from the slack return chamber 20. Then, all of the coolant enters the vehicle radiator from the engine outlet pipe 10. As shown in section EE, at this time, the outlet of the small circulation outlet chamber 16 is in a closed state, and the engine outlet 15 is in a fully open state.

[0032] It needs to be further explained that, such as Figure 5a , 5bAs shown in section HH, in the hydraulic retarder open state (as indicated by section 5c), all coolant flows from the cylinder head outlet chamber 21 into the hydraulic retarder, then flows back from the hydraulic retarder return pipe 6 to the hydraulic retarder return chamber 20 of the intelligent thermal management valve 4, enters the ball valve, and then flows entirely from the engine outlet pipe 10 into the vehicle radiator. As shown in section GG, the outlet of the small circulation outlet chamber 16 is closed at this time. When the hydraulic retarder is working, to ensure sufficient coolant flow, all coolant flows into the hydraulic retarder, and the large circulation channel is opened, allowing coolant to flow into the vehicle radiator for cooling.

[0033] In this specific embodiment, the opening and closing response time of the intelligent thermal management valve 4 from 0% to 100% is ≤5s; the output voltage of the intelligent thermal management valve 4 at the closed stop position is 0.25±0.1 V; the output voltage of the intelligent thermal management valve 4 at the open stop position is 4.75±0.1 V; the position / angle error of the intelligent thermal management valve 4 at the maximum steady state is ≤2%; when the intelligent thermal management valve 4 drives the double ball valve 4f with a 100% duty cycle, and the ambient temperature is -40℃, the maximum intermittent peak current consumption of the actuator motor of the intelligent thermal management valve 4 is ≤6A. The maximum flow rate of the intelligent thermal management valve 4 at its rated point is ≥400 m³ / min @ 1600 rpm and the pressure drop is ≤90 kPa @ 1600 rpm in the small circulation state; the maximum flow rate of the intelligent thermal management valve 4 at its rated point is ≥470 m³ / min @ 1600 rpm and the pressure drop is ≤20 kPa @ 1600 rpm in the large circulation state; the maximum flow rate of the intelligent thermal management valve 4 at its rated point is ≥370 m³ / min @ 1600 rpm and the pressure drop is ≤10 kPa @ 1600 rpm in the liquid slow-open state; the internal leakage of the intelligent thermal management valve 4 is ≤150 ml / min @ 130 kPa; and the temperature threshold is 82℃.

[0034] It should be noted that the intelligent thermal management valve 4 performs self-learning when powered on. If it cannot reach the maximum or minimum opening degree for 10 seconds, it will report a self-learning failure fault message.

[0035] In the above detailed description, various features are combined together in a single embodiment to simplify this disclosure. This approach to disclosure should not be construed as reflecting an intention that embodiments of the claimed subject matter require more features than are explicitly stated in each claim. Rather, as reflected in the appended claims, the invention is presented with fewer features than all of the features in a single disclosed embodiment. Therefore, the appended claims are hereby explicitly incorporated into the detailed description, with each claim representing a separate preferred embodiment of the invention.

[0036] The disclosed embodiments have been described above to enable any person skilled in the art to implement or use this invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments without departing from the spirit and scope of this disclosure. Therefore, this disclosure is not limited to the embodiments given herein, but is consistent with the widest scope of the principles and novel features disclosed in this application.

[0037] The foregoing description includes examples of one or more embodiments. It is certainly impossible to describe all possible combinations of components or methods in order to describe the above embodiments, but those skilled in the art will recognize that further combinations and arrangements of the various embodiments are possible. Therefore, the embodiments described herein are intended to cover all such changes, modifications, and variations that fall within the scope of the appended claims. Furthermore, the term "comprising" as used in the specification or claims is interpreted in a manner similar to the term "including," as interpreted when used as a conjunction in the claims. Additionally, the use of any term "or" in the specification of the claims is intended to mean "non-exclusive or."

[0038] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A cooling system for a high-horsepower engine equipped with an intelligent thermal management valve and a liquid retarder, characterized in that: Includes water pump inlet pipe (1), water pump (2), oil cooler (3), intelligent thermal management valve (4), hydraulic retarder water inlet pipe (5), hydraulic retarder water return pipe (6), vehicle accessory water inlet pipe (7), vehicle accessory water return pipe (8), degassing connector (9), engine water outlet pipe (10), and small circulation bypass pipe (11), wherein: The water pump (2) is connected to the water pump inlet pipe (1) and the oil cooler (3) respectively; the outlet of the oil cooler (3) is connected to the engine block (14); the water intake end of the intelligent thermal management valve (4) is connected to the outlet of the engine cylinder head (13), the water intake end of the hydraulic retarder is connected to the hydraulic retarder water intake pipe (5), and the return end of the hydraulic retarder is connected to the hydraulic retarder return pipe (6); the intelligent heat pipe The outlet of the water valve (4) is the engine outlet pipe (10), which is connected to the vehicle radiator; the vehicle accessory return pipe (8) is connected to the water pump inlet pipe (1); one end of the degassing connector (9) is connected to the highest point of the coolant passage of the intelligent thermal management valve (4), and the other end is connected to the vehicle expansion tank; the upper end of the small circulation bypass pipe (11) is connected to the intelligent thermal management valve (4), and the lower end is connected to the water pump inlet pipe (1).

2. The high-horsepower engine cooling system equipped with an intelligent thermal management valve and a liquid retarder according to claim 1, characterized in that: The speed ratio of the water pump (2) is 2.

06.

3. The high-horsepower engine cooling system equipped with an intelligent thermal management valve and a liquid retarder according to claim 1, characterized in that: The heat dissipation capacity of the oil cooler (3) is 70.4KW.

4. The high-horsepower engine cooling system equipped with an intelligent thermal management valve and a liquid retarder according to claim 1, characterized in that: The intelligent thermal management valve (4) adopts a double ball valve (4f), which includes a first water hole (4a), a second water hole (4b), a third water hole (4c), and a fourth water hole (4d). The diameter of the throttle valve of the double ball valve (4f) is 90mm.

5. The high-horsepower engine cooling system equipped with an intelligent thermal management valve and a liquid retarder according to claim 1, characterized in that: The outer diameter of the hydraulic retarder return water pipe (6) is 50 mm, the wall thickness is 1.2 mm, and the flow rate is 410 L / min @ 1700 RPM.

6. The high-horsepower engine cooling system equipped with an intelligent thermal management valve and a liquid retarder according to claim 1, characterized in that: The inner diameter of the degassing connector (9) is 3.5 mm; the inner diameters of the vehicle accessory water inlet pipe (7) and the vehicle accessory water return pipe (8) are both 19.75 mm.

7. The high-horsepower engine cooling system equipped with an intelligent thermal management valve and a liquid retarder according to claim 1, characterized in that: The hydraulic retarder return water pipe (6) is provided with a water inlet connector (12) for supplying coolant to the vehicle accessories; the water inlet connector (12) is connected to the vehicle accessory water inlet pipe (7).

Images