Inlet pipe, engine cooling system, engine and vehicle

Abstract

This utility model relates to the field of engine technology, specifically disclosing a water inlet pipe, an engine cooling system, an engine, and a vehicle. The water inlet pipe includes a pipe body with an inlet for connecting to the outlet of a water pump. The pipe body also has multiple outlets, at least one of which is directly connected to the engine's coolant inlet. An internal thermostat is installed in the flow path between the remaining outlets and the engine's coolant inlet. The internal thermostat can connect or disconnect the flow path between the outlets and the engine's coolant inlet. During cold starts at low temperatures, the internal thermostat disconnects the flow path, reducing the amount of coolant entering the engine, allowing the engine to warm up quickly while ensuring a uniform temperature rise, thus delaying thermal fatigue.

Description

Technical Field

[0001] This utility model relates to the field of engine technology, and in particular to a water inlet pipe, an engine cooling system, an engine, and a vehicle. Background Technology

[0002] The engine cooling system includes internal and external circulation pipes. When the engine is started cold, only the internal circulation pipes participate in cooling the engine, causing the coolant temperature to rise rapidly to the optimal operating temperature in a short time. Subsequently, both the internal and external circulation pipes work together to cool the engine, ensuring smooth engine operation. When the ambient temperature is too low, the traditional internal circulation pipe structure heats up slowly, resulting in longer engine operation under cold conditions and greater wear.

[0003] To address this, existing technologies provide a rapid warm-up cooling system that prevents coolant from flowing through the cylinder block's water jacket during the initial cold start phase, allowing the cylinder block to heat up quickly and thus enabling rapid engine warm-up. However, because the coolant doesn't flow through the cylinder block's water jacket, the heat distribution within the cylinder block is uneven, and the re-flow of coolant through the water jacket causes rapid temperature changes in the cylinder block. Frequent and significant temperature fluctuations in the cylinder block during cold starts make it more susceptible to thermal fatigue, potentially leading to engine failure. Utility Model Content

[0004] The purpose of this invention is to provide a water inlet pipe, an engine cooling system, an engine, and a vehicle that can achieve rapid engine warm-up while ensuring uniform temperature rise and delaying the occurrence of thermal fatigue.

[0005] This utility model provides a water inlet pipe, including a water inlet pipe body. The water inlet pipe body is provided with a water inlet for communicating with the outlet of a water pump. The water inlet pipe body is also provided with multiple water outlets, all of which are connected to the water inlet. At least one of the water outlets is directly connected to the engine's cooling water inlet. An internal thermostat is provided in the communication path between the remaining water outlets and the engine's cooling water inlet. The internal thermostat can connect or disconnect the communication path between the water outlets and the engine's cooling water inlet.

[0006] As a preferred technical solution for the water inlet pipe, the water inlet pipe body is connected to a first outlet pipe and a second outlet pipe. Both the first outlet pipe and the second outlet pipe are connected to the water inlet pipe body. The first outlet pipe and the second outlet pipe respectively form the water outlet. The internal thermostat is installed inside the second outlet pipe.

[0007] As a preferred technical solution for the water inlet pipe, the internal thermostat is a mechanical thermostat.

[0008] As a preferred technical solution for the water inlet pipe, the flow area of ​​the first outlet pipe is smaller than that of the second outlet pipe.

[0009] As a preferred technical solution for the inlet pipe, the ratio of the flow area of ​​the first outlet pipe to the flow area of ​​the second outlet pipe is 0.4-0.6.

[0010] This utility model provides an engine cooling system, including a water pump, an internal circulation pipeline and an external circulation pipeline. The internal circulation pipeline includes an internal circulation return pipe and an inlet pipe of any of the above schemes. The inlet of the inlet pipe is connected to the outlet of the water pump, and the outlet of the inlet pipe is connected to the engine's cooling water inlet. The engine's cooling water outlet is connected to the inlet of the water pump through the internal circulation return pipe.

[0011] The external circulation pipeline includes an external thermostat and a radiator. The engine's coolant outlet is connected to the radiator's inlet. The external thermostat is located between the engine and the radiator. The radiator's outlet is connected to the water pump's inlet.

[0012] As a preferred technical solution for the engine cooling system, the internal circulation pipeline also includes a heater heat exchanger, which is connected to the flow path from the engine to the water pump.

[0013] As a preferred technical solution for the engine cooling system, a switching valve is also included. The switching valve is connected to the flow path from the engine to the water pump and is located upstream of the heater heat exchanger. The switching valve has a first working position and a second working position. When the switching valve is in the first working position, the cooling water outlet of the engine is directly connected to the inlet of the water pump. When the switching valve is in the second working position, the cooling water outlet of the engine is connected to the inlet of the water pump through the heater heat exchanger.

[0014] This invention provides an engine, including an engine cooling system according to any of the above-described embodiments.

[0015] This utility model provides a vehicle that includes the engine described above.

[0016] The beneficial effects of this utility model are as follows:

[0017] This utility model provides a water inlet pipe with multiple water outlets on the pipe body. At least one water outlet is directly connected to the engine's coolant inlet. The remaining water outlets are connected to the engine's coolant inlet via an internal thermostat to connect or disconnect the flow path. During cold starts at low temperatures, the internal thermostat disconnects the flow path, reducing the amount of coolant entering the engine. This allows the engine to heat up quickly while ensuring a uniform temperature rise, thus delaying the occurrence of thermal fatigue.

[0018] This invention provides an engine cooling system that, by incorporating a water inlet pipe, facilitates low-temperature cold starts of the engine.

[0019] This invention provides an engine with improved low-temperature cold start performance and longer service life by incorporating its engine cooling system.

[0020] This utility model provides a vehicle whose engine, when configured according to this utility model, exhibits better low-temperature cold start performance, thus better meeting the usage requirements in low-temperature environments. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view of the water inlet pipe in an embodiment of this utility model;

[0022] Figure 2 This is a schematic diagram of the engine cooling system in an embodiment of this utility model.

[0023] In the picture:

[0024] 10. Engine; 20. Water pump; 30. Radiator; 40. External thermostat; 50. Heat exchanger; 51. Switching valve;

[0025] 1. Inlet pipe; 11. First outlet pipe; 12. Second outlet pipe; 13. Internal thermostat;

[0026] 100. Internal circulation pipeline; 200. External circulation pipeline. Detailed Implementation

[0027] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Moreover, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0031] like Figures 1-2As shown, this utility model provides a water inlet pipe 1, which is installed on the cylinder block or cylinder head of engine 10 and is used to supply cooling water to the cooling water jacket of engine 10. The water inlet pipe 1 includes a pipe body with an inlet port that connects to the outlet of a water pump 20. The water pump 20 supplies cooling water to the inlet port through a pipeline. The pipe body also has multiple outlets, all of which are connected to the inlet port. At least one outlet is directly connected to the cooling water inlet of engine 10. An internal thermostat 13 is installed in the flow path between the remaining outlets and the cooling water inlet of engine 10. The internal thermostat 13 can connect or disconnect the flow path between the outlets and the cooling water inlet of engine 10. During cold starts at low temperatures, the internal thermostat 13 disconnects the flow path, reducing the amount of cooling water entering engine 10, allowing engine 10 to heat up quickly while ensuring a uniform temperature rise, thus delaying the occurrence of thermal fatigue. In this embodiment, the water outlet can be directly connected to the cooling water inlet of the engine 10, or it can be connected through a pipeline. Correspondingly, the internal thermostat 13 can be installed inside the water outlet of the water inlet pipe body, or it can be installed on the pipeline between the water outlet and the cooling water inlet.

[0032] In this embodiment, the water outlets can be configured as 2, 3, or 4, and the number of water outlets directly connected to the cooling water inlet of the engine 10 is less than or equal to the number of the remaining water outlets. For example, when there are 2 water outlets, one water outlet is directly connected to the cooling water inlet of the engine 10, and the other water outlet has an internal thermostat 13 installed in the flow path connecting it to the cooling water inlet of the engine 10. That is, the number of water outlets directly connected to the cooling water inlet of the engine 10 is equal to the number of the remaining water outlets. During cold starts at low temperatures, cooling water is supplied to the engine 10 only through the water outlet directly connected to the cooling water inlet of the engine 10. At this time, the amount of cooling water entering the engine 10 is relatively small, and the engine 10 heats up quickly. After the engine 10 temperature rises to a certain level, both water outlets supply cooling water to the engine 10, achieving rapid heating while reducing the temperature change of the cooling water. For example, when there are three water outlets, one outlet is directly connected to the coolant inlet of the engine 10, while the other two outlets have internal thermostats 13 installed on their respective flow paths to the coolant inlet of the engine 10. This means the number of outlets directly connected to the coolant inlet of the engine 10 is less than the number of the remaining outlets. During a cold start at low temperatures, coolant is supplied to the engine 10 only through the outlet directly connected to the coolant inlet. At this time, the amount of coolant entering the engine 10 is relatively small, allowing the engine 10 to heat up quickly. Once the engine 10 reaches a certain temperature, two outlets supply coolant, and subsequently, all three outlets supply coolant simultaneously, achieving rapid heating while minimizing coolant temperature fluctuations. It can be understood that because the number of outlets directly connected to the coolant inlet of the engine 10 is less than or equal to the number of the remaining outlets, a greater number of outlets results in a faster heating rate and a smaller fluctuation in coolant temperature during a cold start. When the number of water outlets is set to 4, one or two water outlets can be directly connected to the engine 10, and the other three or two water outlets are equipped with internal thermostats 13 in the flow path connecting to the cooling water inlet of the engine 10. This can also achieve rapid heating and reduce the temperature change of the cooling water. The specific process is similar to that when the number of water outlets is set to 2 or 3, and will not be described again here.

[0033] like Figure 1 As shown, to reduce control difficulty and structural complexity, in this embodiment, the number of water outlets is preferably set to two, that is, the water inlet pipe body is connected to a first outlet pipe 11 and a second outlet pipe 12, both of which are connected to the water inlet pipe body. The first outlet pipe 11 and the second outlet pipe 12 respectively form water outlets, the first outlet pipe 11 is directly connected to the engine 10, and the second outlet pipe 12 has an internal thermostat 13 installed inside.

[0034] Optionally, in this embodiment, the internal thermostat 13 is preferably a mechanical thermostat. A mechanical thermostat requires no electrical control; it can automatically connect the flow path when the cooling water temperature reaches the preset temperature and automatically disconnect the flow path when the cooling water temperature falls below the preset temperature, resulting in higher operational reliability.

[0035] Further, please continue to refer to Figure 1 As shown, the flow area of ​​the first outlet pipe 11 is smaller than that of the second outlet pipe 12. This ensures that only a small amount of cooling water enters the engine 10 during the initial stage of a cold start, allowing it to heat up rapidly in a short time. The ratio of the flow area of ​​the first outlet pipe 11 to that of the second outlet pipe 12 is 0.4, 0.5, or 0.6. In this embodiment, the ratio is preferably 0.5.

[0036] This invention provides an engine cooling system, including a water pump 20, an internal circulation pipe 100, and an external circulation pipe 200. The internal circulation pipe 100 includes an inlet pipe 1 and an internal circulation return pipe, as described in this embodiment. The inlet of the inlet pipe 1 is connected to the outlet of the water pump 20, and the outlet of the inlet pipe 1 is connected to the cooling water inlet of the engine 10. The cooling water outlet of the engine 10 is connected to the water pump 20 via the internal circulation return pipe. The external circulation pipe 200 includes an external thermostat 40 and a radiator 30. The cooling water outlet of the engine 10 is connected to the inlet of the radiator 30. The external thermostat 40 is positioned between the engine 10 and the radiator 30, and the outlet of the radiator 30 is connected to the water pump 20. The inlet pipe 1 of this invention facilitates cold starts of the engine 10 at low temperatures.

[0037] Furthermore, such as Figure 2 As shown, the internal circulation pipe 100 also includes a heater heat exchanger 50, which is connected to the flow path from the engine 10 to the water pump 20, i.e., the heater heat exchanger 50 is connected to the internal circulation return water pipe. By setting the water inlet pipe 1 in this embodiment, the temperature of the engine 10 can rise rapidly, so that the heater heat exchanger 50 can supply heat to the heater earlier.

[0038] Furthermore, to prevent the heater core 50 from consuming heat from the cooling water during the initial cold start phase, which would reduce the engine 10's warm-up rate, the internal circulation pipe 100 also includes a switching valve 51. The switching valve 51 is connected to the flow path from the engine 10 to the water pump 20 and is located upstream of the heater core 50. The switching valve 51 has a first working position and a second working position. When the switching valve 51 is in the first working position, the cooling water outlet of the engine 10 is directly connected to the inlet of the water pump 20. When the switching valve 51 is in the second working position, the cooling water outlet of the engine 10 is connected to the inlet of the water pump 20 through the heater core 50. In other words, the internal circulation return pipe consists of two parallel paths, one of which directly connects the cooling water outlet of the engine 10 to the inlet of the water pump 20, while the heater core 50 is connected to the other path. The switching valve 51 is a two-position three-way solenoid valve. When the heater switch is off, the switching valve 51 is in the first working position to avoid consuming heat from the cooling water. When the heater switch is turned on, the switching valve 51 is in the second working position, supplying heat to the heater.

[0039] This invention provides an engine, including the engine cooling system in this embodiment. By setting the engine cooling system in this embodiment, the engine has better low-temperature cold start performance and a longer service life.

[0040] This utility model provides a vehicle, including the engine 10 in this embodiment. By setting the engine 10 in this embodiment, the vehicle has better low-temperature cold start performance and can better meet the usage requirements in low-temperature environments.

[0041] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A water inlet pipe, characterized in that, The system includes an inlet pipe body, which has an inlet for connecting to the outlet of a water pump (20). The inlet pipe body also has multiple outlets, which are connected to the inlet. At least one outlet is directly connected to the cooling water inlet of the engine (10). An internal thermostat (13) is provided on the flow path between the other outlets and the cooling water inlet of the engine (10). The internal thermostat (13) can connect or disconnect the flow path between the outlets and the cooling water inlet of the engine (10).

2. The water inlet pipe according to claim 1, characterized in that, The inlet pipe body is connected to a first outlet pipe (11) and a second outlet pipe (12). The first outlet pipe (11) and the second outlet pipe (12) are both connected to the inlet pipe body. The first outlet pipe (11) and the second outlet pipe (12) respectively form the water outlet. The internal thermostat (13) is installed inside the second outlet pipe (12).

3. The water inlet pipe according to claim 1, characterized in that, The internal thermostat (13) is a mechanical thermostat.

4. The water inlet pipe according to claim 2, characterized in that, The flow area of ​​the first outlet pipe (11) is smaller than that of the second outlet pipe (12).

5. The water inlet pipe according to claim 4, characterized in that, The ratio of the flow area of ​​the first outlet pipe (11) to the flow area of ​​the second outlet pipe (12) is 0.4-0.

6.

6. An engine cooling system, comprising a water pump (20), an internal circulation pipe (100), and an external circulation pipe (200), characterized in that, The internal circulation pipeline (100) includes an internal circulation return water pipe and an inlet water pipe (1) as described in any one of claims 1-5. The inlet of the inlet water pipe (1) is connected to the outlet of the water pump (20), the outlet of the inlet water pipe (1) is connected to the cooling water inlet of the engine (10), and the cooling water outlet of the engine (10) is connected to the inlet of the water pump (20) through the internal circulation return water pipe. The external circulation pipeline (200) includes an external thermostat (40) and a radiator (30). The cooling water outlet of the engine (10) is connected to the inlet of the radiator (30). The external thermostat (40) is located between the engine (10) and the radiator (30). The outlet of the radiator (30) is connected to the inlet of the water pump (20).

7. The engine cooling system according to claim 6, characterized in that, The internal circulation pipeline (100) also includes a heater heat exchanger (50), which is connected to the communication path from the engine (10) to the water pump (20).

8. The engine cooling system according to claim 7, characterized in that, It also includes a switching valve (51), which is connected to the flow path from the engine (10) to the water pump (20) and is located upstream of the heater (50). The switching valve (51) has a first working position and a second working position. When the switching valve (51) is in the first working position, the cooling water outlet of the engine (10) is directly connected to the inlet of the water pump (20). When the switching valve (51) is in the second working position, the cooling water outlet of the engine (10) is connected to the inlet of the water pump (20) through the heater (50).

9. An engine, characterized in that, Includes the engine cooling system as described in any one of claims 6-8.

10. A vehicle, characterized in that, Includes the engine (10) as described in claim 9.

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