Hybrid diesel engine cooling system

Abstract

The application discloses a hybrid diesel engine cooling system, comprising: an engine water jacket assembly, an electronic water pump, a thermostat assembly and a water tank; the thermostat assembly comprises a valve seat, a cylinder block thermostat and a cylinder head thermostat, the cylinder head thermostat and the cylinder block thermostat are arranged in a first mounting cavity and a second mounting cavity respectively, the water inlet of the first mounting cavity and the water inlet of the second mounting cavity are communicated with a cylinder head water jacket, and the water outlet of the first mounting cavity and the water outlet of the second mounting cavity are communicated with the water tank; the first end of a small circulation channel on the cylinder head is communicated with the water inlet of the first mounting cavity, and the second end of the small circulation channel on the cylinder head is communicated with the cylinder block water jacket; according to the different cooling water temperatures of the cylinder block and the cylinder head, the cylinder block and the cylinder head are cooled separately by the cylinder head thermostat and the cylinder block thermostat, the circulation flow of the cooling liquid is accurately controlled, and therefore, the engine can work under the optimal temperature condition, and the reliability of the engine work is improved.

Description

Technical Field

[0001] This invention relates to the field of automobile manufacturing technology, and more specifically, to a hybrid diesel engine cooling system. Background Technology

[0002] During engine operation, the maximum temperature can reach 2500℃, and even at idle or medium speeds, the average temperature of the combustion chamber is above 1000℃. Without cooling, the engine will overheat, leading to deteriorated operation, reduced component strength, oil deterioration, increased wear, and a comprehensive decline in power, economy, reliability, and durability. Conversely, excessive cooling will cause the engine to operate at low temperatures for extended periods, increasing heat dissipation and friction losses, accelerating component wear, worsening emissions, causing rough engine operation, reduced power, and increased fuel consumption. The function of the cooling system is to maintain the engine within an appropriate temperature range under all operating conditions, preventing both overheating and excessive cold in winter. After a cold engine start, the cooling system must also ensure rapid engine warm-up to reach normal operating temperature as quickly as possible. Currently, engine cooling is divided into water cooling and air cooling, with water cooling being more common in modern engines. Engine water cooling systems are all forced circulation water systems, where the coolant is pressurized in a water pump and enters the engine block's water jacket, flowing around the jacket walls and absorbing heat from them. Then it flows upward into the cylinder head water jacket, absorbs heat from the cylinder head water jacket wall, and then flows into the radiator through the thermostat and radiator inlet hose. In the radiator, the coolant dissipates heat to the air flowing around the radiator to cool down, and finally the coolant returns to the water pump through the radiator outlet hose, and the cycle continues.

[0003] Existing engines typically have a single thermostat to control the circulation of coolant within the engine. However, a single thermostat cannot precisely control the flow rate of the coolant, thus failing to ensure the engine operates at its optimal temperature. Furthermore, thermostat failure inevitably leads to engine overheating and cylinder scoring, resulting in low reliability.

[0004] Therefore, how to provide a hybrid diesel engine cooling system has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] One objective of this invention is to provide a new technical solution for a hybrid diesel engine cooling system.

[0006] According to a first aspect of the present invention, a hybrid diesel engine cooling system is provided, comprising: an engine water jacket assembly, an electric water pump, a thermostat assembly, and a water tank; the electric water pump is connected to the engine water jacket assembly and the water tank respectively, the engine water jacket assembly includes a cylinder head water jacket and a cylinder block water jacket; the engine includes a cylinder block, a cylinder head, and a combustion chamber, the cylinder head water jacket is fitted on the cylinder head, the cylinder block water jacket is fitted on the cylinder block, and the cylinder head water jacket is connected to the cylinder block water jacket;

[0007] The cylinder head water jacket includes a small circulation channel on the cylinder head;

[0008] The thermostat assembly includes a valve seat, a cylinder block thermostat, and a cylinder head thermostat. The valve seat has a first mounting cavity and a second mounting cavity. The cylinder head thermostat is disposed in the first mounting cavity, and the cylinder block thermostat is disposed in the second mounting cavity. The inlets of the first mounting cavity and the second mounting cavity are both connected to the cylinder head water jacket, and the outlets of the first mounting cavity and the second mounting cavity are both connected to the water tank. The first end of the small circulation channel on the cylinder head is connected to the inlet of the first mounting cavity, and the second end of the small circulation channel on the cylinder head is connected to the cylinder block water jacket. The cylinder block thermostat is used to control the opening or closing of the second mounting cavity, and the cylinder head thermostat is used to control the opening or closing of the outlet of the first mounting cavity.

[0009] The coolant flows sequentially through the first mounting cavity, the water tank, the water pump, the cylinder block water jacket, and the cylinder head water jacket, circulating into the thermostat assembly to form a first circulation path; the coolant flows sequentially through the second mounting cavity, the water tank, the water pump, and the cylinder block water jacket, circulating into the thermostat assembly to form a second circulation path; the coolant flows sequentially through the first mounting cavity, the small circulation channel on the cylinder head, the electric water pump, the cylinder block water jacket, and the cylinder head water jacket, circulating into the thermostat assembly to form a third circulation path.

[0010] Optionally, the cylinder head water jacket includes an upper cylinder head water jacket and a lower cylinder head water jacket. The upper cylinder head water jacket has a first water inlet and a cylinder head water jacket outlet. The lower cylinder head water jacket has an oil cooler water inlet and a first water outlet. The first water inlet is connected to the first water outlet.

[0011] The inlet of the first mounting cavity is connected to the outlet of the cylinder head water jacket.

[0012] Optionally, the cylinder block water jacket includes an independent inlet chamber, a cylinder block combustion chamber water jacket, a small circulation channel on the cylinder block, and an oil cooler return chamber; the cylinder block combustion chamber water jacket is fitted onto the combustion chamber, the independent inlet chamber is connected to the cylinder block combustion chamber water jacket and the lower cylinder head water jacket respectively, the first end of the small circulation channel on the cylinder block is connected to the outlet of the small circulation channel on the cylinder head and the electric water pump, the independent inlet chamber has a cylinder block water jacket outlet, and the oil cooler return chamber is connected to the inlet of the second mounting chamber;

[0013] The second end of the small circulation channel on the cylinder block is connected to the return water chamber of the oil cooler. The coolant passes through the small circulation channel on the cylinder head, the small circulation channel on the cylinder block, the return water chamber of the oil cooler, the electronic water pump, and the independent water inlet chamber in sequence, and then enters the cylinder block combustion chamber water jacket and the cylinder head water jacket respectively. It then circulates into the thermostat assembly to form a third circulation water path.

[0014] Optionally, the thermostat assembly further includes a water temperature sensor, which is disposed on the valve seat and inserted into the outlet of the cylinder head water jacket. The water temperature sensor is used to detect the temperature of the coolant discharged from the outlet of the cylinder head water jacket in real time.

[0015] Optionally, the thermostat assembly further includes a heater inlet pipe, the first end of which is connected to the water inlet of the first mounting cavity, and the second end of which is used to introduce higher temperature water into the cab.

[0016] Optionally, the valve seat is provided with a through hole for discharging gas from the valve seat.

[0017] Optionally, the engine water jacket assembly further includes an exhaust groove disposed between the cylinder head water jacket and the cylinder block water jacket, the exhaust groove being used to discharge gases that have entered the cooling system from the combustion chamber.

[0018] Optionally, the hybrid diesel engine cooling system further includes an oil cooler, a battery, an SCR nozzle, a urea tank, an air pump, and a cab. The oil cooler, the battery, the SCR nozzle, the urea tank, the air pump, and the cab are respectively connected to an independent water inlet chamber, the cylinder head water jacket, and the electronic water pump.

[0019] Optionally, the electronic water pump is provided with a water pump outlet, a heater return pipe, a water pump inlet, and an accessory return pipe. The water pump inlet is connected to the water tank. The second end of the water pump inlet is connected to the first end of the water pump outlet, the second end of the heater return pipe, and the second end of the accessory return pipe. The second end of the water pump outlet is connected to the independent water inlet chamber. The first end of the heater return pipe is connected to the cab. The first end of the accessory return pipe is connected to the oil cooler, the battery, the SCR nozzle, the urea tank, and the air pump.

[0020] The beneficial effects of this invention are as follows:

[0021] This invention involves placing the cylinder head thermostat and the cylinder block thermostat in a first mounting cavity and a second mounting cavity, respectively. The inlets of both the first and second mounting cavities are connected to the cylinder head water jacket, and the outlets of both are connected to the water tank. A small circulation channel on the cylinder head connects to the inlet of the first mounting cavity and to the cylinder block water jacket, allowing the coolant to sequentially pass through the first mounting cavity, water tank, water pump, cylinder block water jacket, and cylinder head water jacket before circulating into the thermostat assembly, forming a first circulation water path. The coolant then sequentially passes through the second mounting cavity,... The water tank, water pump, and cylinder block water jacket circulate into the thermostat assembly, forming a second circulation water path. The coolant sequentially passes through the first mounting chamber, the small circulation channel on the cylinder head, the electric water pump, the cylinder block water jacket, and the cylinder head water jacket before circulating into the thermostat assembly, forming a third circulation water path. The cylinder head thermostat and the cylinder block thermostat achieve separate cooling of the cylinder block and cylinder head based on the different coolant temperatures of the cylinder block and cylinder head, thereby precisely controlling the coolant circulation flow rate. This ensures that the engine can operate under optimal temperature conditions, improving engine reliability and effectively extending engine lifespan.

[0022] Other features and advantages of the invention will become clear from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings. Attached Figure Description

[0023] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the invention and, together with their description, serve to explain the principles of the invention.

[0024] Figure 1 This is a structural diagram of the hybrid diesel engine cooling system of the present invention;

[0025] Figure 2 This is a structural diagram showing the connection between the engine water jacket assembly, the electronic water pump, and the thermostat assembly of the present invention.

[0026] Figure 3This is a structural diagram of the connection between the engine water jacket assembly, electronic water pump, and thermostat assembly of the present invention from another angle.

[0027] Figure 4 This is a structural diagram of the engine water jacket assembly of the present invention;

[0028] Figure 5 This is a structural diagram of the cylinder head water jacket of the present invention;

[0029] Figure 6 This is a structural diagram of the cylinder water jacket of the present invention;

[0030] Figure 7 This is a structural diagram of the thermostat assembly of the present invention;

[0031] Figure 8 This is a structural diagram of the electronic water pump of the present invention.

[0032] The diagram shows the following: 1. Engine water jacket assembly; 11. Cylinder head water jacket; 111. Upper cylinder head water jacket; 112. Lower cylinder head water jacket; 113. Cylinder head water jacket outlet; 114. Oil cooler inlet; 12. Cylinder block water jacket; 121. Independent inlet chamber; 122. Cylinder block combustion chamber water jacket; 123. Cylinder block water jacket outlet; 13. Oil cooler return chamber; 14. Exhaust duct; 2. Electric water pump; 21. Water pump 1. Outlet; 22. Heater return pipe; 23. Water pump inlet; 24. Accessory return pipe; 3. Thermostat assembly; 31. Valve seat; 32. Cylinder block thermostat; 33. Cylinder head thermostat; 34. First mounting cavity; 35. Second mounting cavity; 36. Water temperature sensor; 37. Heater inlet pipe; 4. Water tank; 5. Oil cooler; 6. Battery; 7. SCR nozzle; 8. Urea tank; 9. Air pump; 101. Cab. Detailed Implementation

[0033] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0034] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0035] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0036] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0037] like Figures 1 to 8 As shown, this embodiment of the invention provides a hybrid diesel engine cooling system, including: an engine water jacket assembly 1, an electronic water pump 2, a thermostat assembly 3, and a water tank 4; the electronic water pump 2 is connected to the engine water jacket assembly 1 and the water tank 4 respectively; the engine water jacket assembly 1 includes a cylinder head water jacket 11 and a cylinder block water jacket 12; the engine includes a cylinder block, a cylinder head, and a combustion chamber; the cylinder head water jacket 11 is fitted on the cylinder head, and the cylinder block water jacket 12 is fitted on the cylinder block, and the cylinder head water jacket 11 and the cylinder block water jacket 12 are connected.

[0038] The cylinder head water jacket 11 includes a small circulation channel on the cylinder head.

[0039] The thermostat assembly 3 includes a valve seat 31, a cylinder block thermostat 32, and a cylinder head thermostat 33. The valve seat 31 has a first mounting cavity 34 and a second mounting cavity 35. The cylinder head thermostat 33 is disposed in the first mounting cavity 34, and the cylinder block thermostat 32 is disposed in the second mounting cavity 35. The inlet of the first mounting cavity 34 and the inlet of the second mounting cavity 35 are both connected to the cylinder head water jacket 11, and the outlet of the first mounting cavity 34 and the outlet of the second mounting cavity 35 are both connected to the water tank 4. The first end of the small circulation channel on the cylinder head is connected to the inlet of the first mounting cavity 34, and the second end of the small circulation channel on the cylinder head is connected to the cylinder block water jacket 12. The cylinder block thermostat 32 is used to control the opening or closing of the second mounting cavity 35, and the cylinder head thermostat 33 is used to control the opening or closing of the outlet of the first mounting cavity 34.

[0040] The coolant flows sequentially through the first mounting cavity 34, water tank 4, water pump, cylinder block water jacket 12 and cylinder head water jacket 11, and then circulates into the thermostat assembly 3, forming the first circulating water path. The coolant flows sequentially through the second mounting cavity 35, water tank 4, water pump and cylinder block water jacket 12, and then circulates into the thermostat assembly 3, forming the second circulating water path. The coolant flows sequentially through the first mounting cavity 34, the small circulation channel on the cylinder head, the electric water pump 2, the cylinder block water jacket 12 and cylinder head water jacket 11, and then circulates into the thermostat assembly 3, forming the third circulating water path.

[0041] It should be noted that the starting temperature of the cylinder head thermostat 33 and the starting temperature of the cylinder block thermostat 32 can be the same or different. In this embodiment, the starting temperature of the cylinder head thermostat 33 and the starting temperature of the cylinder block thermostat 32 are different. Therefore, the cylinder head thermostat 33 and the cylinder block thermostat 32 can control the opening of the first circulating water circuit and the second circulating water circuit respectively, thereby cooling the engine block and cylinder head.

[0042] In this embodiment, the starting temperature of the cylinder head thermostat 33 is greater than the starting temperature of the cylinder block thermostat 32.

[0043] Specifically, during engine operation, when the water temperature reaches the opening temperature of the cylinder block thermostat 32, the cylinder block thermostat 32 opens the second mounting cavity 35 and closes the small circulation channel on the cylinder head. At this time, the second mounting cavity 35 is connected to the cylinder block water jacket 12. Under the action of the electronic water pump 2, the coolant flows from the second mounting cavity 35 into the water tank 4, and then from the water tank 4 through the water pump into the cylinder block water jacket 12, and circulates into the second mounting cavity 35 in the thermostat assembly 3 to form a second circulation water circuit, thereby cooling the cylinder block.

[0044] When the water temperature reaches the opening temperature of the cylinder head thermostat 33, the cylinder head thermostat 33 opens the outlet of the first mounting cavity 34 and closes the small circulation channel on the cylinder head. At this time, the first mounting cavity 34 is connected to the cylinder head water jacket 11. Under the action of the electronic water pump 2, the coolant flows from the first mounting cavity 34 into the water tank 4, and then from the water tank 4 through the water pump into the cylinder block water jacket 12 and the cylinder head water jacket 11, and circulates into the first mounting cavity 34 in the thermostat assembly 3 to form the first circulation water path, thereby cooling the cylinder head.

[0045] It should be noted that when the water temperature is higher than the opening temperature of the cylinder head thermostat 33 and the cylinder block thermostat 32, the cylinder head thermostat 33 and the cylinder block thermostat 32 simultaneously control the opening of the first mounting cavity 34 and the second mounting cavity 35, thereby connecting the first circulating water circuit and the second circulating water circuit, and thus simultaneously cooling the cylinder head and the cylinder block.

[0046] When the water temperature is simultaneously lower than the opening temperature of both the cylinder head thermostat 33 and the cylinder block thermostat 32, the cylinder head thermostat 33 and the cylinder block thermostat 32 simultaneously control the outlet of the first mounting cavity 34 and the second mounting cavity 35 to close. The cylinder head thermostat 33 opens the small circulation channel on the cylinder head. Under the action of the electronic water pump 2, the coolant passes through the first mounting cavity 34, the small circulation channel on the cylinder head, the electronic water pump 2, the cylinder block water jacket 12, and the cylinder head water jacket 11 in sequence, and circulates into the thermostat assembly 3 to form a third circulation water circuit. Since the size of the first connecting pipe is small, the cylinder block water jacket 12 is in a non-flowing or slightly flowing state, which can ensure that the engine can quickly heat up to reach the optimal operating temperature.

[0047] This invention involves respectively installing the cylinder head thermostat 33 and the cylinder block thermostat 32 within a first mounting cavity 34 and a second mounting cavity 35. The inlets of both the first and second mounting cavities 34 and 35 are connected to the cylinder head water jacket 11, and the outlets of both are connected to the water tank 4. The first end of a small circulation channel on the cylinder head is connected to the inlet of the first mounting cavity 34, and the second end is connected to the cylinder block water jacket 12. This allows the coolant to sequentially pass through the first mounting cavity 34, the water tank 4, the water pump, the cylinder block water jacket 12, and the cylinder head water jacket 11, circulating into the thermostat assembly 3 to form a first circulation water path. The coolant then sequentially passes through… The coolant flows through the second mounting cavity 35, water tank 4, water pump and cylinder block water jacket 12, circulating into the thermostat assembly 3 to form the second circulating water path. The coolant then flows through the first mounting cavity 34, small circulation channel on the cylinder head, electric water pump 2, cylinder block water jacket 12, and cylinder head water jacket 11, circulating into the thermostat assembly 3 to form the third circulating water path. The cylinder head thermostat 33 and cylinder block thermostat 32 achieve separate cooling of the cylinder block and cylinder head according to the different coolant temperatures of the cylinder block and cylinder head, thereby precisely controlling the coolant circulation flow rate. This ensures that the engine can operate under optimal temperature conditions, improves the reliability of engine operation, and effectively extends the service life of the engine.

[0048] In one embodiment of the hybrid diesel engine cooling system of the present invention, such as Figures 2 to 5 As shown, the cylinder head water jacket 11 includes an upper cylinder head water jacket 111 and a lower cylinder head water jacket 112. The upper cylinder head water jacket 111 has a first water inlet and a cylinder head water jacket outlet 113. The lower cylinder head water jacket 112 has an oil cooler water inlet 114 and a first water outlet. The first water inlet and the first water outlet are connected.

[0049] The inlet of the first mounting cavity 34 is connected to the outlet 113 of the cylinder head water jacket.

[0050] The present invention provides a first water inlet and a cylinder head water jacket outlet 113 on the upper cylinder head water jacket 111, and an oil cooler water inlet 114 and a first water outlet on the lower cylinder head water jacket 112, so that the first water inlet and the first water outlet are connected, and the water inlet of the first mounting cavity 34 is connected to the cylinder head water jacket outlet 113, thereby ensuring that the coolant can be smoothly introduced into the upper cylinder head water jacket 111 and the lower cylinder head water jacket 112, thereby cooling the cylinder head water jacket 11.

[0051] In one embodiment of the hybrid diesel engine cooling system of the present invention, such as Figures 2 to 6As shown, the cylinder block water jacket 12 includes an independent inlet chamber 121, a cylinder block combustion chamber water jacket 122, a small circulation channel on the cylinder block, and an oil cooler return water chamber 13. The cylinder block combustion chamber water jacket 122 is fitted onto the combustion chamber. The independent inlet chamber 121 is connected to the cylinder block combustion chamber water jacket 122 and the lower cylinder head water jacket 112. The first end of the small circulation channel on the cylinder block is connected to the outlet of the small circulation channel on the cylinder head and the electric water pump 2. The second end of the small circulation channel on the cylinder block is connected to the oil cooler return water chamber 13. The independent inlet chamber 121 has a cylinder block water jacket outlet 123. The oil cooler return water chamber 13 is connected to the inlet of the second mounting cavity 35. The oil cooler return water chamber 13 is also connected to the accessory return water pipe 24 of the electric water pump 2.

[0052] The coolant passes through the small circulation channel on the cylinder head, the small circulation channel on the cylinder block, the oil cooler return water chamber 13, the electric water pump 2, and the independent water inlet chamber 121 in sequence, and then enters the cylinder block combustion chamber water jacket 122 and the cylinder head water jacket 11 respectively. It then circulates into the thermostat assembly 3 to form the third circulation water circuit.

[0053] This invention involves mounting the cylinder block combustion chamber water jacket 122 onto the combustion chamber. An independent water inlet chamber 121 is connected to both the cylinder block combustion chamber water jacket 122 and the lower cylinder head water jacket 112. The first end of the small circulation channel on the cylinder block is connected to the outlet of the small circulation channel on the cylinder head and the electronic water pump 2. The second end of the small circulation channel on the cylinder block is connected to the oil cooler return water chamber 13. This allows the coolant to sequentially pass through the first mounting chamber 34, the small circulation channel on the cylinder head, the small circulation channel on the cylinder block, the oil cooler return water chamber 13, the electronic water pump 2, and the independent water inlet chamber 121 before entering the cylinder block combustion chamber water jacket 122 and the cylinder head water jacket 11, circulating into the thermostat assembly 3 to form a third circulation water path, thereby ensuring the smooth flow of the third circulation water path.

[0054] In one embodiment of the hybrid diesel engine cooling system of the present invention, such as Figure 7 As shown, the thermostat assembly 3 also includes a water temperature sensor 36, which is mounted on the valve seat 31 and inserted into the cylinder head water jacket outlet 113. The water temperature sensor 36 is used to detect the temperature of the coolant discharged from the cylinder head water jacket outlet 113 in real time.

[0055] This invention, by placing a water temperature sensor 36 on the valve seat 31 and inserting the water temperature sensor 36 into the cylinder head water jacket outlet 113, can monitor the water temperature in the cylinder block and cylinder head by detecting the temperature of the coolant discharged from the cylinder head water jacket outlet 113 in real time, thereby avoiding the problem of engine failure caused by excessively high water temperature in the cylinder block and cylinder head.

[0056] In one embodiment of the hybrid diesel engine cooling system of the present invention, such as Figure 7As shown, the thermostat assembly 3 also includes a heater inlet pipe 37. The first end of the heater inlet pipe 37 is connected to the water inlet of the first mounting cavity 34, and the second end of the heater inlet pipe 37 is used to introduce high-temperature water into the cab 101.

[0057] The present invention connects the first end of the heater inlet pipe 37 to the water inlet of the first mounting cavity 34, and the second end of the heater inlet pipe 37 is used to introduce high-temperature water into the cab 101, thereby introducing hot water from the cylinder head into the cab to heat the cab 101.

[0058] In one embodiment of the hybrid diesel engine cooling system of the present invention, a through hole is provided on the valve seat 31 for discharging gas from the valve seat 31. This arrangement enables the gas in the valve seat 31 to be discharged through the through hole, ensuring smooth degassing of the engine, reducing the risk of cylinder head gasket blow-off, and extending engine service life.

[0059] In one embodiment of the hybrid diesel engine cooling system of the present invention, such as Figures 1 to 6 As shown, the engine water jacket assembly 1 also includes an exhaust groove 14, which is disposed between the cylinder head water jacket 11 and the cylinder block water jacket 12. The exhaust groove 14 is used to discharge the gas that has entered the cooling system from the combustion chamber. This arrangement ensures the smooth circulation of coolant by discharging the gas in the cylinder head water jacket 11 and the cylinder block water jacket 12 through the exhaust groove 14.

[0060] In one embodiment of the hybrid diesel engine cooling system of the present invention, such as Figure 1 As shown, the hybrid diesel engine cooling system also includes an oil cooler 5, a battery 6, an SCR nozzle 7, a urea tank 8, an air pump 9, and a cab 101. The oil cooler 5, battery 6, SCR nozzle 7, urea tank 8, air pump 9, and cab 101 are respectively connected to an independent water inlet chamber 121, a cylinder head water jacket 11, and an electronic water pump 2.

[0061] Specifically, the oil cooler 5, battery 6, SCR nozzle 7, urea tank 8, air pump 9, and cab 101 are connected to the independent water inlet chamber 121 and the electronic water pump 2, respectively, so that the coolant is introduced from the independent water inlet chamber 121 into the oil cooler 5, battery 6, SCR nozzle 7, urea tank 8, air pump 9, and cab 101, respectively, ensuring the cooling and heating effects of various parts of the car.

[0062] It should be noted that when the temperatures of the oil cooler 5, battery 6, SCR nozzle 7, urea tank 8, air pump 9, and cab 101 are low, these components can be heated as the engine temperature increases. When the temperatures of the oil cooler 5, battery 6, SCR nozzle 7, urea tank 8, air pump 9, and cab 101 are high, they can be cooled as the engine temperature decreases. Specific settings depend on the actual situation and are not limited here.

[0063] In one embodiment of the hybrid diesel engine cooling system of the present invention, such as Figure 8 As shown, the electronic water pump 2 is equipped with a water pump outlet 21, a heater return pipe 22, a water pump inlet 23, and an accessory return pipe 24. The water pump inlet 23 is connected to the water tank 4. The second end of the water pump inlet 23 is connected to the first end of the water pump outlet 21, the second end of the heater return pipe 22, and the second end of the accessory return pipe 24. The second end of the water pump outlet 21 is connected to the independent water inlet chamber 121. The first end of the heater return pipe 22 is connected to the cab 101. The first end of the accessory return pipe 24 is connected to the oil cooler 5, the battery 6, the SCR nozzle, the urea tank 8, and the air pump 9.

[0064] This invention connects the second end of the water pump inlet 23 to the first end of the water pump outlet 21, the second end of the heater return pipe 22, and the second end of the accessory return pipe 24, respectively. The second end of the water pump outlet 21 is connected to the independent water inlet chamber 121. The first end of the heater return pipe 22 is connected to the cab 101. The first end of the accessory return pipe 24 is connected to the oil cooler 5, battery 6, SCR nozzle 7, urea tank 8, and air pump 9. Thus, the oil cooler 5, battery 6, SCR nozzle 7, urea tank 8, air pump 9, and cab 101 are heated and cooled through the water pump outlet 21, heater return pipe 22, water pump inlet 23, and accessory return pipe 24.

[0065] Specifically, the coolant used to heat the cab 101 and battery 6, as well as the coolant used to cool the oil cooler 5, SCR nozzle 7, urea tank 8, air pump 9, and battery 6, are delivered to the engine water jacket assembly 1 through the water pump outlet 21, heater return pipe 22, water pump inlet 23, and accessory return pipe 24.

[0066] While specific embodiments of the invention have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of the invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A hybrid diesel engine cooling system, characterized in that, include: The engine includes an engine water jacket assembly, an electronic water pump, a thermostat assembly, and a water tank. The electronic water pump is connected to both the engine water jacket assembly and the water tank. The engine water jacket assembly includes a cylinder head water jacket and a cylinder block water jacket. The engine includes a cylinder block, a cylinder head, and a combustion chamber. The cylinder head water jacket is fitted onto the cylinder head, and the cylinder block water jacket is fitted onto the cylinder block, with the cylinder head water jacket and the cylinder block water jacket communicating with each other. The cylinder head water jacket includes a small circulation channel on the cylinder head; The thermostat assembly includes a valve seat, a cylinder block thermostat, and a cylinder head thermostat. The valve seat has a first mounting cavity and a second mounting cavity. The cylinder head thermostat is disposed in the first mounting cavity, and the cylinder block thermostat is disposed in the second mounting cavity. The inlets of the first mounting cavity and the second mounting cavity are both connected to the cylinder head water jacket, and the outlets of the first mounting cavity and the second mounting cavity are both connected to the water tank. The first end of the small circulation channel on the cylinder head is connected to the inlet of the first mounting cavity, and the second end of the small circulation channel on the cylinder head is connected to the cylinder block water jacket. The cylinder block thermostat is used to control the opening or closing of the second mounting cavity, and the cylinder head thermostat is used to control the opening or closing of the outlet of the first mounting cavity. The coolant flows sequentially through the first mounting cavity, the water tank, the water pump, the cylinder block water jacket, and the cylinder head water jacket, and then circulates into the thermostat assembly to form a first circulating water path; the coolant flows sequentially through the second mounting cavity, the water tank, the water pump, and the cylinder block water jacket, and then circulates into the thermostat assembly to form a second circulating water path; The coolant flows sequentially through the first mounting cavity, the small circulation channel on the cylinder head, the electronic water pump, the cylinder block water jacket, and the cylinder head water jacket, and then circulates into the thermostat assembly to form a third circulation water path. The cylinder head water jacket includes an upper cylinder head water jacket and a lower cylinder head water jacket. The upper cylinder head water jacket has a first water inlet and a cylinder head water jacket outlet. The lower cylinder head water jacket has an oil cooler water inlet and a first water outlet. The first water inlet is connected to the first water outlet. The inlet of the first mounting cavity is connected to the outlet of the cylinder head water jacket; The cylinder block water jacket includes an independent water inlet chamber, a cylinder block combustion chamber water jacket, a small circulation channel on the cylinder block, and an oil cooler return water chamber; the cylinder block combustion chamber water jacket is fitted onto the combustion chamber; the independent water inlet chamber is connected to the cylinder block combustion chamber water jacket and the lower cylinder head water jacket respectively; the first end of the small circulation channel on the cylinder block is connected to the outlet of the small circulation channel on the cylinder head and the electronic water pump; the independent water inlet chamber has a cylinder block water jacket outlet; and the oil cooler return water chamber is connected to the inlet of the second mounting chamber. The second end of the small circulation channel on the cylinder block is connected to the return water chamber of the oil cooler. The coolant passes through the small circulation channel on the cylinder head, the small circulation channel on the cylinder block, the return water chamber of the oil cooler, the electronic water pump, and the independent water inlet chamber in sequence, and then enters the cylinder block combustion chamber water jacket and the cylinder head water jacket respectively. It then circulates into the thermostat assembly to form a third circulation water path.

2. The hybrid diesel engine cooling system according to claim 1, characterized in that, The thermostat assembly also includes a water temperature sensor, which is mounted on the valve seat and inserted into the outlet of the cylinder head water jacket. The water temperature sensor is used to detect the temperature of the coolant discharged from the outlet of the cylinder head water jacket in real time.

3. The hybrid diesel engine cooling system according to claim 1, characterized in that, The thermostat assembly also includes a heater inlet pipe, the first end of which is connected to the water inlet of the first mounting cavity, and the second end of which is used to introduce high-temperature water into the cab.

4. The hybrid diesel engine cooling system according to claim 1, characterized in that, The valve seat is provided with a through hole, which is used to discharge gas from the second mounting cavity of the valve seat.

5. The hybrid diesel engine cooling system according to claim 1, characterized in that, The engine water jacket assembly also includes an exhaust groove, which is disposed between the cylinder head water jacket and the cylinder block water jacket. The exhaust groove is used to discharge the gas that has entered the cooling system from the combustion chamber.

6. The hybrid diesel engine cooling system according to claim 1, characterized in that, The hybrid diesel engine cooling system also includes an oil cooler, a battery, an SCR nozzle, a urea tank, an air pump, and a cab. The oil cooler, the battery, the SCR nozzle, the urea tank, the air pump, and the cab are respectively connected to an independent water inlet chamber, the cylinder head water jacket, and the electronic water pump.

7. The hybrid diesel engine cooling system according to claim 6, characterized in that, The electronic water pump is equipped with a water pump outlet, a heater return pipe, a water pump inlet, and an accessory return pipe. The water pump inlet is connected to the water tank. The second end of the water pump inlet is connected to the first end of the water pump outlet, the second end of the heater return pipe, and the second end of the accessory return pipe. The second end of the water pump outlet is connected to the independent water inlet chamber. The first end of the heater return pipe is connected to the cab. The first end of the accessory return pipe is connected to the oil cooler, the battery, the SCR nozzle, the urea tank, and the air pump.

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