Engine cooling system

Abstract

The invention discloses an engine cooling system which is used for improving engine performance. The device comprises a water pump, an engine oil cooler, a water-cooled jacket assembly, a thermostat, a water temperature sensor and an electric heating bypass device. A water outlet of the water pump is connected with a water return port of the engine oil cooler; a water outlet of the engine oil cooler is connected with a water inlet of the water-cooled jacket assembly; a water outlet of the water-cooled jacket assembly is connected with a water inlet of the thermostat; a first water outlet of the thermostat is provided with a first three-way joint and is connected with the first three-way joint through a second hose; a water inlet of the water pump is connected with the first three-way joint through a first hose; a water return port of the engine oil cooler is connected with the first three-way joint through a third hose; the electric heating bypass device is installed on the third hose and forms a parallel structure with the water pump, the opening degree of the electric heating bypass device is in negative correlation with the water temperature monitored by the water temperature sensor, and the electric heating bypass device is used for heating the cooling liquid flowing through the third hose.

Description

Technical Field

[0001] The present application relates to the field of mechanical technology, and in particular to an engine cooling system. Background Art

[0002] The engine is the core power component of the car, which can convert the chemical energy of the fuel into mechanical energy to drive the mechanical operation. When the engine burns fuel, a lot of heat will be generated. This heat will cause the temperature to be too high, thereby damaging the internal components of the engine, such as the cylinder, piston and valve, and may even cause the engine to melt or performance to deteriorate. Therefore, when the engine is running, the cooling system will be started. The cooling system circulates coolant to take away the excess heat generated by the engine during the combustion process. The engine is in the ideal operating temperature range, ensuring the combustion efficiency of the fuel and the viscosity of the lubricating oil, improving the overall performance of the engine and extending the service life of the engine.

[0003] Among them, the small circulation of the engine cooling system not only prevents the engine from overheating, but also helps to warm up the engine. When the cooling system performs a small circulation, the engine radiator will not participate in the operation and the engine heat will not be lost.

[0004] However, when the small cycle of the cooling system is first started, the temperature of the coolant is relatively low, which will lead to low combustion efficiency, poor fuel consumption and emissions, and even serious problems such as carbon deposits in the engine, which will lead to cylinder failure. The small cycle of the cooling system has a low heating rate, which leads to reduced engine performance. Summary of the invention

[0005] In order to solve the above technical problems, the present application provides an engine cooling system for improving engine performance.

[0006] The engine cooling system provided by the present application includes: a water pump, an oil cooler, a water cooling jacket assembly, a thermostat, a water temperature sensor and an electric thermal bypass device;

[0007] The water outlet of the water pump is connected to the water return port of the oil cooler;

[0008] The water outlet of the oil cooler is connected to the water inlet of the water cooling jacket assembly;

[0009] The water outlet of the water cooling jacket assembly is connected to the water inlet of the thermostat;

[0010] The first water outlet of the thermostat is provided with a first three-way joint and is connected via a second hose;

[0011] The water inlet of the water pump is connected to the first three-way joint through a first hose;

[0012] The water return port of the oil cooler is connected to the first three-way joint through a third hose;

[0013] The electric thermal bypass device is installed on the third hose and forms a parallel structure with the water pump. The opening of the electric thermal bypass device is negatively correlated with the water temperature monitored by the water temperature sensor. The electric thermal bypass device is used to heat the coolant flowing through the third hose.

[0014] Optionally, the water cooling jacket assembly includes: a cylinder block water jacket and a cylinder head water jacket;

[0015] The water inlet of the water jacket of the water cylinder body is connected to the water outlet of the oil cooler;

[0016] The water inlet of the cylinder head water jacket is connected to the water outlet of the cylinder body water jacket;

[0017] The water outlet of the cylinder head water jacket is connected to the water inlet of the thermostat.

[0018] Optionally, the water temperature sensor is installed in the cylinder block water jacket or the cylinder head water jacket.

[0019] Optionally, the engine cooling system is provided with a radiator;

[0020] The water inlet of the radiator is connected to the second water outlet of the thermostat;

[0021] The water outlet of the radiator is connected to the water inlet of the water pump.

[0022] Optionally, the radiator is provided with a water tank cover and a water tank cover spring;

[0023] The water tank cap is installed on the top of the radiator;

[0024] The water tank cover spring is installed in the water tank cover and is used for relieving pressure inside the radiator.

[0025] Optionally, the engine cooling system is provided with a cooling fan, and the cooling fan is installed in front of the radiator and is parallel to and opposite to the radiator.

[0026] Optionally, the engine cooling system is provided with an expansion water tank;

[0027] The water inlet of the expansion water tank is provided with a second three-way joint, one branch of which is connected to the third water outlet of the thermostat;

[0028] The water inlet of the expansion water tank is connected to the water outlet of the radiator through another branch of the second three-way joint;

[0029] The water outlet of the expansion water tank is connected to the water inlet of the radiator and the water inlet of the water pump.

[0030] Optionally, the engine cooling system is provided with a heater water tank;

[0031] The water inlet of the heater water tank is connected to the third water outlet of the thermostat;

[0032] The water outlet of the warm air water tank is connected to the water inlet of the water pump.

[0033] Optionally, the engine cooling system is provided with an electronic control unit, which is mounted on the inner wall of the engine compartment and is used to control the operation of the engine cooling system;

[0034] The electronic control unit is electrically connected to the water temperature sensor and the electric thermal bypass device.

[0035] Optionally, the electric thermal bypass device is provided with an electronic valve and an electric heating element, the electronic valve is electrically connected to the electronic control unit, and the electronic control unit is used to cooperate with the water temperature sensor to control the opening of the electronic valve to control the flow of the coolant flowing through the third hose. The electric heating element is an electric heating tube or an electric heating pad.

[0036] It can be seen from the above technical solutions that this application has the following advantages:

[0037] An electric thermal bypass device is connected in parallel to the small cycle. The electric thermal bypass device diverts the coolant, thereby controlling the flow rate of the small cycle. The electric thermal bypass device can also heat the coolant in the pipeline, allowing the coolant to quickly rise to an optimal temperature, which is beneficial to improving engine performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solution in the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 A schematic structural diagram of an embodiment of an engine cooling system provided by the present application;

[0040] Figure 2 A schematic structural diagram of an embodiment of an engine cooling system provided by the present application;

[0041] Figure 3 A schematic diagram of the cross-sectional structure of an oil cooler of an embodiment of an engine cooling system provided in the present application. DETAILED DESCRIPTION

[0042] In order to solve the above technical problems, the present application provides an engine cooling system for improving engine performance.

[0043] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only used to illustrate the relative positional relationships between the various components or components, and do not particularly limit the specific installation orientations of the various components or components.

[0044] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0045] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0046] In addition, the structures, proportions, sizes, etc. drawn in the drawings in the present application are only used to match the contents disclosed in the specification for the technical personnel in this field to understand and read, and are not used to limit the restrictive conditions under which the present application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in the present application without affecting the effects and purposes that can be achieved by the present application.

[0047] The following will be combined with the drawings in this application to clearly and completely describe the technical solutions in this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0048] See also Figures 1 to 3 , the present application provides an engine cooling system, comprising: a water pump 1, an oil cooler 2, a water cooling jacket assembly 3, a thermostat 4, a water temperature sensor and an electric thermal bypass device 5;

[0049] The water outlet of the water pump 1 is connected to the water return port 22 of the oil cooler 2;

[0050] The water outlet 21 of the oil cooler 2 is connected to the water inlet of the water cooling jacket assembly 3;

[0051] The water outlet of the water cooling jacket assembly 3 is connected to the water inlet of the thermostat 4;

[0052] The first water outlet of the thermostat 4 is provided with a first three-way joint 41 and is connected via a second hose 43;

[0053] The water inlet of the water pump 1 is connected to the first three-way connector 41 through a first hose 42;

[0054] The water return port 22 of the oil cooler 2 is connected to the first three-way connector 41 through a third hose 44;

[0055] The electric thermal bypass device 5 is installed on the third hose 44 to form a parallel structure with the water pump 1. The opening of the electric thermal bypass device 5 is negatively correlated with the water temperature monitored by the water temperature sensor. The electric thermal bypass device 5 is used to heat the coolant flowing through the third hose 44.

[0056] The following describes in detail the various components in this embodiment:

[0057] Water pump 1: Installed on the side of the engine belt, it is responsible for regulating the flow of coolant in the cooling system, preventing the local temperature of the engine from being too high, ensuring the normal operation of the engine, and ensuring that the engine can run stably within the appropriate temperature range.

[0058] Oil cooler 2: Usually installed near the water tank or at the base pipe of the oil filter element, it uses coolant to cool the oil to prevent the oil from degrading due to high temperature and also ensure the effectiveness of engine lubrication.

[0059] Water cooling jacket assembly 3: The water cooling jacket surrounding the cylinder shell helps the engine dissipate heat and maintain the normal operating temperature of the engine by forming a circulating coolant channel inside the engine.

[0060] Thermostat 4: Installed between the internal circulation water channel and the external water channel of the engine, its opening and closing state is controlled by the coolant temperature to switch the coolant between large and small circulation.

[0061] Water temperature sensor: monitors the temperature of the coolant in the water channel inside the engine and converts it into an electrical signal to transmit to the electronic control unit. It is the basis for water temperature regulation.

[0062] Electric thermal bypass device 5: installed on the pipeline of the cooling system, it can divert the coolant and heat the coolant flowing through the pipeline.

[0063] The engine cooling system circulates the coolant in the engine in large and small cycles through the water cooling pipes. The small cycle helps the engine to warm up when it starts, and the large cycle can effectively absorb and dissipate the heat generated during the operation of the engine, keeping the engine within the optimal operating temperature range. Proper temperature control not only prevents damage caused by engine overheating, such as cylinder deformation and piston seizure, but also ensures the viscosity and lubrication effect of the engine oil, reduces friction and wear, and extends the life of the engine. At the same time, the cooling system also helps to improve combustion efficiency and reduce emissions, which is beneficial to environmental protection and energy utilization.

[0064] In this embodiment, the water pump 1, the oil cooler 2, the water cooling jacket assembly 3, and the thermostat 4 of the engine cooling system are connected in sequence through hoses and joints to form a closed loop, so that the coolant can circulate. The outlet of the thermostat 4 is connected to the first three-way joint 41 through a second hose 43. The electric thermal bypass device 5 is installed on the third hose 44. The third hose 44 connects the first three-way joint 41 and the return water port 22 of the oil cooler 2. The electric thermal bypass device 5 and the water pump 1 are in a parallel structure. The opening of the electric thermal bypass device 5 is negatively correlated with the water temperature monitored by the water temperature sensor. When the engine is cold started, the thermostat 4 is in a closed state, and the cooling system performs a small cycle. The water pump 1 in the cooling system follows the rotation of the crankshaft to pump out the coolant and flow into the oil cooler 2, and then passes through the water cooling jacket assembly 3 and the thermostat 4 in sequence. The coolant flows back to the water pump 1 after passing through the thermostat 4. When the coolant passes through each component, it takes away the excess heat generated by the component. The water temperature sensor detects the water temperature of the coolant in the water cooling pipe. When the water temperature sensor detects that the coolant temperature is too low, the electric thermal bypass device 5 will be fully opened and the heating function will be started. A part of the coolant pumped out by the water pump 1 will flow back to the water pump 1 through the third hose 44 equipped with the electric thermal bypass device 5. The resistance of the coolant flowing in the third hose 44 equipped with the electric thermal bypass device 5 is smaller than the resistance of flowing in the small cycle. Most of the coolant will pass through the electric thermal bypass device 5, taking away the local high temperature while accelerating the temperature of the coolant flowing through the third hose 44. When the water temperature sensor detects that the coolant temperature rises, the electric thermal bypass device 5 begins to reduce the opening, the resistance of the coolant flow increases, and the coolant flowing through the third hose 44 becomes less and less. When the water temperature reaches 95 degrees Celsius, the electric thermal bypass device 5 is completely closed, the paraffin in the thermostat 4 melts, and the spring in the thermostat 4 pushes the thermostat valve open. The water cycle of the cooling system changes from a small cycle to a large cycle, and the engine coolant works according to the large cycle.

[0065] In this embodiment, the electric thermal bypass device 5 adjusts the opening according to the coolant temperature to control the flow of the coolant in the third hose 44, and the electric thermal bypass device 5 can increase the temperature of the coolant flowing through the third hose 44 to avoid damage to the engine caused by cold start. Under high temperature conditions, the electric thermal bypass device 5 reduces the coolant flow in the third hose 44, allowing the coolant to enter a large circulation, enhancing the cooling effect, protecting the engine and improving the engine performance.

[0066] Please read further Figure 1 In an optional embodiment, the water cooling jacket assembly 3 includes: a cylinder block water jacket 31 and a cylinder head water jacket 32;

[0067] The water inlet of the water jacket 31 of the water cylinder body is connected to the water outlet 21 of the oil cooler 2;

[0068] The water inlet of the cylinder head water jacket 32 ​​is connected to the water outlet of the cylinder body water jacket 31;

[0069] The water outlet of the cylinder head water jacket 32 ​​is connected to the water inlet of the thermostat 4 .

[0070] In this embodiment, the water-cooling jacket assembly 3 is composed of a cylinder water jacket 31 and a cylinder head water jacket 32. The cylinder water jacket 31 surrounds the cylinder body and is located between the inner and outer shells of the cylinder body. The water inlet of the cylinder water jacket 31 is connected to the water outlet 21 of the oil cooler 2. The cylinder head water jacket 32 ​​surrounds the cylinder head and is located between the inner and outer shells of the cylinder head. The water inlet of the cylinder head water jacket 32 ​​is connected to the water outlet of the cylinder water jacket 31. The coolant first passes through the cylinder water jacket 31 for cooling, and then flows to the water inlet of the thermostat 4 through the cylinder head water jacket 32. When the engine is running, the cylinder will repeatedly perform mechanical movements of inflation, compression and exhaust and explosive combustion reactions, generating huge heat, causing deformation of the cylinder body, cylinder head and other components, thereby affecting the sealing of the cylinder and reducing the engine operating efficiency. When the coolant passes through the cylinder block water jacket 31 and the cylinder head water jacket 32, it absorbs the heat on the cylinder block and the cylinder head, preventing the cylinder block and the cylinder head from deformation and maintaining the normal operation of the engine. At the same time, the cylinder block water jacket 31 and the cylinder head water jacket 32 ​​separate the cylinder block and the cylinder head from other components, reducing the influence of the heat generated by other components during operation on the cylinder block and the cylinder head, thereby protecting the cylinder block and the cylinder head.

[0071] In this embodiment, the cylinder block water jacket 31 and the cylinder head water jacket 32 ​​wrap the cylinder block and the cylinder head respectively, so that the coolant can be more evenly distributed and effectively absorb the heat on the cylinder block and the cylinder head, prevent local overheating, ensure sealing performance, and at the same time ensure long-term stable operation of the engine and increase the service life of the engine.

[0072] In an optional embodiment, the water temperature sensor is installed in the cylinder block water jacket 31 or the cylinder head water jacket 32 ​​.

[0073] Water temperature sensor: usually uses thermistor or thermocouple technology to sense the heat change of coolant and convert the temperature change into an electrical signal for transmission. In the engine cooling system, the water temperature sensor is an important tool to ensure the cooling effect and directly affects the safety and reliability of the engine.

[0074] In this embodiment, the water temperature sensor is installed in the cylinder water jacket 31 or the cylinder head water jacket 32. The cylinder is a key component for generating kinetic energy of the engine. The cylinder water jacket 31 and the cylinder head water jacket 32 ​​surround the cylinder. The water temperature sensor contacts the coolant flowing through the cylinder water jacket 31 or the cylinder head water jacket 32. The monitored coolant temperature can accurately reflect the working state of the engine cylinder. The temperature monitored by the water temperature sensor is also the basis for adjusting the components such as the electric thermal bypass device 5 in the engine cooling system. According to the temperature monitored by the water temperature sensor, the opening and closing states of the components such as the electric thermal bypass device 5 are effectively adjusted to ensure that the engine is always kept at a suitable temperature during operation, extend the service life of the engine components, and improve the overall performance of the engine.

[0075] See also Figure 1 , in an optional embodiment, the engine cooling system is provided with a radiator 6;

[0076] The water inlet of the radiator 6 is connected to the second water outlet of the thermostat 4;

[0077] The water outlet of the radiator 6 is connected to the water inlet of the water pump 1 .

[0078] Radiator 6: It is a key component of the engine cooling system. It cools the engine through forced water circulation to ensure that the engine works continuously within the normal temperature range.

[0079] In this embodiment, the water inlet of the radiator 6 is connected to the second water outlet of the thermostat 4, and the water outlet of the radiator 6 is connected to the water inlet of the water pump 1, forming a closed loop. The coolant flows from the thermostat 4 into the radiator 6, and the radiator 6 divides the coolant that absorbs the heat of various engine components into many small streams from top to bottom or horizontally to increase the heat dissipation area and dissipate the heat in the coolant to the surrounding air. After the coolant passes through the radiator 6, the temperature can be reduced by 10 to 15 degrees Celsius. The coolant with reduced temperature is recirculated through the water pump 1 to maintain continuous cooling efficiency.

[0080] In an optional embodiment, the radiator 6 is provided with a water tank cover and a water tank cover spring;

[0081] The water tank cap is installed on the top of the radiator 6;

[0082] The water tank cover spring is installed in the water tank cover and is used to relieve pressure inside the radiator 6.

[0083] In this embodiment, the water tank cap is installed on the top of the radiator 6 to seal the radiator 6 and maintain the pressure of the internal coolant to prevent the evaporation and leakage of the coolant. The water tank cap spring is located inside the water tank cap and plays a role in regulating the internal pressure of the radiator 6. When the coolant expands due to high temperature, the pressure in the radiator 6 will increase. When it reaches a preset threshold, the water tank cap spring will automatically open to discharge part of the coolant to prevent the radiator 6 from being damaged due to overpressure. When the pressure in the radiator 6 returns to a normal level, the water tank cap spring will close again. When the pressure in the radiator 6 drops, the water tank cap spring will open again to allow part of the coolant to flow into the radiator 6 to ensure the stable circulation of the coolant.

[0084] In an optional embodiment, the engine cooling system is provided with a cooling fan, which is installed in front of the radiator 6 and parallel to the radiator 6 .

[0085] Cooling fan: coaxially driven with the water pump 1, mounted on the pulley or flange at the front end of the water pump shaft by screws. The cooling fan is used to increase the air velocity and flow rate flowing through the radiator 6, enhance the heat dissipation capacity of the radiator 66 and cool the engine.

[0086] In this embodiment, the cooling fan is installed in front of the radiator 6, parallel to the radiator 6. When the wind blowing into the radiator 6 from the outside cannot meet the heat dissipation requirements, the coolant temperature rises, and the cooling fan starts at this time to increase the air flow, and the radiator 6 is forced to cool and dissipate the heat, helping the radiator 6 to quickly dissipate the heat in the coolant to the environment, ensuring that the coolant is at a suitable temperature, improving the efficiency of the engine cooling system, and improving the engine performance.

[0087] See also Figure 1 , in an optional embodiment, the engine cooling system is provided with an expansion water tank 7;

[0088] The water inlet of the expansion water tank 7 is provided with a second three-way joint, one branch of which is connected to the third water outlet of the thermostat 4;

[0089] The water inlet of the expansion water tank 7 is connected to the water outlet of the radiator 6 through another branch of the second three-way joint;

[0090] The water outlet of the expansion water tank 7 is connected to the water inlet of the radiator 6 and the water inlet of the water pump 1 .

[0091] Coolant expansion tank 7: It is a coolant storage tank, which ensures that there is sufficient coolant in the radiator 6, so that the coolant in the radiator 6 has space to be released when it expands due to heat, and has compensating coolant when it contracts due to cooling.

[0092] In this embodiment, the expansion water tank 7 is used to regulate and store the coolant to cope with the temperature change and the expansion of the coolant during the operation of the engine. The expansion water tank 7 is connected to the third water outlet of the thermostat 4 and the water outlet of the radiator 6 through the second three-way joint, and the water outlet of the expansion water tank 7 is connected to the water inlet of the radiator 6 and the water inlet of the water pump 1 to form a closed-loop cooling system. When the coolant absorbs too much heat, part of the coolant enters the expansion water tank through the water outlet of the radiator 6, reducing the internal pressure of the radiator 6 and avoiding the evaporation and leakage of the coolant. When the internal pressure of the radiator 6 is lower than the normal value, the coolant in the expansion water tank 7 will re-enter the radiator 6. At the same time, another branch is connected to the third water outlet of the thermostat 4. When the internal pressure of the radiator 6 increases, the coolant flowing to the radiator 6 is diverted to relieve the pressure of the radiator 6. The water outlet of the expansion water tank 7 is connected to the water inlet of the water pump 1 to ensure that the coolant can smoothly enter the water pump 1 and flow back into the circulation system to maintain the stability of the coolant circulation. The expansion tank 7 can adapt to the volume change of the coolant and can also effectively relieve the pressure of the radiator 6, thereby improving the reliability of the overall cooling system.

[0093] See also Figure 1 In an optional embodiment, the engine cooling system is provided with a heater water tank 7;

[0094] The water inlet of the warm air water tank 7 is connected to the third water outlet of the thermostat;

[0095] The water outlet of the warm air water tank 7 is connected to the water inlet of the water pump.

[0096] Heater water tank 7: The car heater water tank 7 is usually connected to the engine coolant circulation through a water pipe to achieve heat transfer and regulation of the temperature inside the car.

[0097] In this embodiment, the heater water tank 7 uses the heat of the engine coolant to provide warm air for the vehicle. The water inlet of the heater water tank 7 is connected to the third water outlet of the thermostat, and the water outlet of the heater water tank 7 is connected to the water inlet of the water pump, so that the heater water tank 7 is connected to the engine cooling system. When the engine is running, the coolant circulates, and when passing through the heater water tank 7, the heat in the coolant is transferred to the liquid in the box body, and the heat is blown into the vehicle through the air flow, thereby increasing the temperature inside the vehicle. The heater water tank 7 effectively utilizes the heat in the coolant and improves the circulating cooling effect of the engine cooling system.

[0098] In an optional embodiment, the engine cooling system is provided with an electronic control unit, which is mounted on the inner wall of the engine compartment, and the electronic control unit is used to control the operation of the engine cooling system;

[0099] The electronic control unit is electrically connected to the water temperature sensor and the electric thermal bypass device 5 .

[0100] Electronic control unit: The core of the automobile engine control system. It can adjust the operation of various components according to the working status of the engine by using signal transmission to keep the engine in the best working state at all times.

[0101] In this embodiment, the electronic control unit of the engine cooling system is installed on the inner wall of the engine compartment, and the electronic control unit is electrically connected to the water temperature sensor and the electric thermal bypass device 5. The water temperature sensor monitors the temperature of the coolant, converts the digital signal into an electrical signal and feeds it back to the electronic control unit, which analyzes and processes the electrical signal and sends control instructions to each component through an electrical route according to the processing result, such as sending an electrical signal of the control instruction to the electric thermal bypass device, and the electric thermal bypass device 5 performs corresponding adjustments after receiving the electrical signal. In addition to being electrically connected to the water temperature sensor and the electric thermal bypass device, it is also electrically connected to the cooling fan. When the electronic control unit receives a signal that the coolant temperature is too high, it sends an instruction to the cooling fan 7, and the cooling fan 7 is turned on to accelerate the heat dissipation of the radiator 6. The electronic control unit control can adjust the operation of each component of the engine cooling system according to the temperature information fed back by the water temperature sensor, ensuring that the engine can adapt to different working conditions and the effectiveness of the engine cooling system, thereby improving the automation of the engine cooling system.

[0102] In an optional embodiment, an electronic valve and an electric heating element are provided in the electric thermal bypass device 5 . The electronic valve is electrically connected to an electronic control unit. The electronic control unit is used to cooperate with a water temperature sensor to control the opening of the electronic valve to control the flow rate of the coolant flowing through the third hose 44 .

[0103] In this embodiment, the electric thermal bypass device 5 is mainly composed of an electronic valve and an electric heating element. After the electronic control unit receives the data from the water temperature sensor and analyzes the data, it transmits the electric signal to the electric thermal bypass device 5. The electronic valve adjusts its opening according to the received electric signal to control the flow of the coolant. When the electronic valve is opened, the electric heating element starts to heat the coolant flowing through the third hose 44, so that the coolant quickly reaches the required temperature, helps the engine warm up, and improves the operating efficiency of the engine.

[0104] In an optional embodiment, the electric heating element is an electric heating tube or an electric heating pad.

[0105] In this embodiment, the electric heating element in the electric heating bypass device 5 is usually an electric heating tube or an electric heating pad. The electric heating tube is a closed metal tube filled with a resistance wire. When running, it can achieve efficient centralized heating through resistance heating. The electric heating pad is an electric heating element embedded in a flexible material, which can be attached to the third hose 44. The electric heating tube and the electric heating pad can quickly increase the coolant temperature, which helps to avoid the unstable state of the engine when starting at low temperature, and ensure the overall performance of the cooling system, ensuring that the engine runs in the best working state. In addition, the electric heating tube and the electric heating pad are small in size and are easy to install on the third hose 44.

[0106] It should be noted that the above description of the disclosed embodiments enables professionals and technicians in the field to implement or use the present application. Various modifications to these embodiments will be apparent to professionals and technicians in the field, and the general principles defined herein can be implemented in other embodiments without departing from the scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An engine cooling system, characterized in that: include: Water pump, oil cooler, water cooling jacket assembly, thermostat, water temperature sensor and electric thermal bypass device; The water outlet of the water pump is connected to the water return port of the oil cooler; The water outlet of the oil cooler is connected to the water inlet of the water cooling jacket assembly; The water outlet of the water cooling jacket assembly is connected to the water inlet of the thermostat; The first water outlet of the thermostat is provided with a first three-way joint and is connected via a second hose; The water inlet of the water pump is connected to the first three-way joint through a first hose; The water return port of the oil cooler is connected to the first three-way joint through a third hose; The electric thermal bypass device is installed on the third hose and forms a parallel structure with the water pump. The opening of the electric thermal bypass device is negatively correlated with the water temperature monitored by the water temperature sensor. The electric thermal bypass device is used to heat the coolant flowing through the third hose.

2. The engine cooling system according to claim 1, characterized in that: The water cooling jacket assembly comprises: a cylinder block water jacket and a cylinder head water jacket; The water inlet of the water jacket of the water cylinder body is connected to the water outlet of the oil cooler; The water inlet of the cylinder head water jacket is connected to the water outlet of the cylinder body water jacket; The water outlet of the cylinder head water jacket is connected to the water inlet of the thermostat.

3. The engine cooling system according to claim 2, characterized in that: The water temperature sensor is installed in the cylinder block water jacket or the cylinder head water jacket.

4. The engine cooling system according to claim 1, characterized in that: The engine cooling system is provided with a radiator; The water inlet of the radiator is connected to the second water outlet of the thermostat; The water outlet of the radiator is connected to the water inlet of the water pump.

5. The engine cooling system according to claim 4, characterized in that: The radiator is provided with a water tank cover and a water tank cover spring; The water tank cap is installed on the top of the radiator; The water tank cover spring is installed in the water tank cover, and the water tank cover spring is used to relieve pressure inside the radiator.

6. The engine cooling system according to claim 4, characterized in that: The engine cooling system is provided with a cooling fan, and the cooling fan is installed in front of the radiator and is parallel to and opposite to the radiator.

7. The engine cooling system according to claim 1, characterized in that: The engine cooling system is provided with an expansion water tank; The water inlet of the expansion water tank is provided with a second three-way joint, one branch of which is connected to the third water outlet of the thermostat; The water inlet of the expansion water tank is connected to the water outlet of the radiator through another branch of the second three-way joint; The water outlet of the expansion water tank is connected to the water inlet of the radiator and the water inlet of the water pump.

8. The engine cooling system according to claim 1, characterized in that: The engine cooling system is provided with a heater water tank; The water inlet of the heater water tank is connected to the third water outlet of the thermostat; The water outlet of the warm air water tank is connected to the water inlet of the water pump.

9. The engine cooling system according to any one of claims 1 to 8, characterized in that: The engine cooling system is provided with an electronic control unit, which is mounted on the inner wall of the engine compartment and is used to control the operation of the engine cooling system; The electronic control unit is electrically connected to the water temperature sensor and the electric thermal bypass device.

10. The engine cooling system according to claim 9, characterized in that: The electric thermal bypass device is provided with an electronic valve and an electric heating element, the electronic valve is electrically connected to the electronic control unit, and the electronic control unit is used to cooperate with the water temperature sensor to control the opening of the electronic valve to control the flow rate of the coolant flowing through the third hose; The electric heating element is an electric heating tube or an electric heating pad.

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