Cooling liquid monitoring system and vehicle
By installing a temperature sensor in the high-temperature radiator outlet chamber and combining it with engine operating conditions to determine the coolant level, the problems of difficult and costly coolant level sensor placement are solved, achieving reliable coolant level monitoring and cost savings.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING SOKON POWER CO LTD
- Filing Date
- 2025-05-27
- Publication Date
- 2026-05-19
AI Technical Summary
In existing technologies, liquid level sensors are difficult to deploy and costly, making it difficult to effectively monitor the loss of vehicle coolant.
A first temperature sensor is installed in the outlet chamber of the high-temperature radiator to determine the coolant level in conjunction with the engine operating conditions. Abnormal coolant levels are detected by temperature changes, which simplifies sensor placement and reduces costs.
It enables reliable monitoring of coolant level, reduces the complexity and cost of sensor placement, and ensures that the engine does not fail due to insufficient coolant level under high-temperature operating conditions.
Smart Images
Figure CN224260433U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of vehicle thermal management system technology, and in particular to a coolant monitoring system and a vehicle. Background Technology
[0002] Currently, some high-performance vehicles are equipped with expansion tank level sensors to monitor coolant loss in the vehicle's high-temperature cooling system in real time. When the coolant level is too low, the vehicle will sound an alarm to prompt the addition of coolant. However, the installation of these level sensors is difficult and relatively expensive. Utility Model Content
[0003] The purpose of this invention is to provide a coolant monitoring system and vehicle to solve the problem of difficult placement of liquid level sensors and save costs.
[0004] In a first aspect, this utility model provides a coolant monitoring system, including an electronic water pump, a cylinder block water jacket, a cylinder head water jacket, a thermostat, a high-temperature radiator, and an expansion tank, wherein:
[0005] The outlet end of the electronic water pump is connected to the inlet end of the cylinder block water jacket, the outlet end of the cylinder block water jacket is connected to the inlet end of the cylinder head water jacket, the outlet end of the cylinder head water jacket is connected to the first port of the thermostat, the second port of the thermostat is connected to the inlet end of the high-temperature radiator, the outlet end of the high-temperature radiator is connected to the inlet end of the electronic water pump, the degassing pipe of the high-temperature radiator is connected to the inlet end of the expansion tank, and the outlet end of the expansion tank is connected to the inlet end of the electronic water pump.
[0006] The high-temperature radiator includes a water outlet chamber, and a first temperature sensor is provided at the top of the water outlet chamber. The first temperature sensor is used to monitor the temperature of the coolant in order to determine the coolant level.
[0007] In the coolant monitoring system described above, preferably, the coolant monitoring system further includes an oil cooler, the third port of the thermostat is connected to the inlet end of the oil cooler, and the outlet end of the oil cooler is connected to the inlet end of the electric water pump.
[0008] In the coolant monitoring system described above, preferably, the coolant monitoring system further includes an EGR cooler, the third port of the thermostat is connected to the inlet end of the EGR cooler, and the outlet end of the EGR cooler is connected to the inlet end of the electric water pump.
[0009] In the coolant monitoring system described above, preferably, the coolant monitoring system further includes a heater core, the third port of the thermostat is connected to the inlet end of the heater core, and the outlet end of the heater core is connected to the electronic water pump.
[0010] In the coolant monitoring system described above, preferably, a second temperature sensor is provided at the third port of the thermostat.
[0011] In the coolant monitoring system described above, preferably, the coolant monitoring system further includes a turbocharger, the outlet end of the cylinder block water jacket is connected to the inlet end of the turbocharger, and the outlet end of the turbocharger is connected to the inlet end of the electric water pump.
[0012] In the coolant monitoring system described above, preferably, the degassing pipe of the cylinder head water jacket is connected to the inlet end of the expansion tank.
[0013] In the coolant monitoring system described above, preferably, a first throttling orifice is provided on the connecting pipe between the degassing pipe of the cylinder head water jacket and the expansion tank.
[0014] In the coolant monitoring system described above, preferably, a second throttling orifice is provided on the connecting pipe between the degassing pipe of the high-temperature radiator and the expansion tank.
[0015] Secondly, this utility model provides a vehicle including the aforementioned coolant monitoring system.
[0016] Compared with the prior art, this utility model sets a first temperature sensor in the water outlet chamber of the high-temperature radiator to detect the coolant temperature. Combined with the engine operating conditions, it can determine whether there is an abnormality in the coolant level. The arrangement of the first temperature sensor is simple, the reliability is high, and it can effectively reduce costs. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the coolant monitoring system provided in an embodiment of the present invention;
[0018] Figure 2 This is a schematic diagram of the structure of a high-temperature radiator provided in an embodiment of this utility model.
[0019] Explanation of reference numerals in the attached figures:
[0020] 1-Electronic water pump, 2-Cylinder block water jacket, 3-Cylinder head water jacket, 4-Thermostat, 5-High temperature radiator, 6-Expansion tank, 7-First temperature sensor, 8-Oil cooler, 9-EGR cooler, 10-Heater core, 11-Second temperature sensor, 12-Turbocharger, 13-First throttle orifice, 14-Second throttle orifice. Detailed Implementation
[0021] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.
[0022] In a first aspect, this utility model provides a coolant monitoring system, including an electronic water pump 1, a cylinder block water jacket 2, a cylinder head water jacket 3, a thermostat 4, a high-temperature radiator 5, and an expansion tank 6, wherein:
[0023] The outlet end of the electric water pump 1 is connected to the inlet end of the cylinder block water jacket 2. The outlet end of the cylinder block water jacket 2 is connected to the inlet end of the cylinder head water jacket 3. The outlet end of the cylinder head water jacket 3 is connected to the first port of the thermostat 4. The second port of the thermostat 4 is connected to the inlet end of the high temperature radiator 5. The outlet end of the high temperature radiator 5 is connected to the inlet end of the electric water pump 1. The degassing pipe of the high temperature radiator 5 is connected to the inlet end of the expansion tank 6. The outlet end of the expansion tank 6 is connected to the inlet end of the electric water pump 1.
[0024] When the vehicle is operating under high temperature conditions, the high-temperature coolant is cooled down to low temperature by the high-temperature radiator 5. The low-temperature coolant flows through the cylinder block water jacket 2 and cylinder head water jacket 3 under the action of the electric water pump 1 to cool down the engine and becomes high-temperature coolant again. It then flows through the high-temperature radiator 5 again to continuously cool the engine.
[0025] Due to the high demand for coolant under high-temperature operating conditions, it is necessary to monitor the coolant level in real time to replenish it promptly and prevent insufficient coolant from triggering vehicle warning lights. To address this issue, in the embodiments provided in this application, the high-temperature radiator 5 includes a water outlet chamber, and a first temperature sensor 7 is provided at the top of the water outlet chamber. The first temperature sensor 7 is used to monitor the coolant temperature to determine the coolant level.
[0026] When the coolant level flowing through the high-temperature radiator 5 drops below the position of the first temperature sensor 7, the first temperature sensor 7 is exposed to the air. During vehicle operation, cold air will impact the high-temperature radiator 5, causing the temperature detected by the first temperature sensor 7 to drop suddenly. Compared with the temperature detected under normal operating conditions, there is a large difference, which can be used to determine that the coolant level is abnormal.
[0027] If the coolant level does not drop below the first temperature sensor 7, the following information can be used to determine the problem: the duty cycle of the electronic water pump 1 is greater than 80%, and the main water temperature is greater than 95°C. If the temperature difference between the main water temperature and the temperature detected by the first temperature sensor 7 exceeds 20°C, the expansion tank 6 is considered to have an abnormal level and requires maintenance and inspection. Coolant should be added to the specified level to protect the engine from high-temperature failure.
[0028] In this application, the first temperature sensor 7 is set at the top of the outlet chamber of the high-temperature radiator 5. Compared with the prior art, which sets the liquid level sensor in the expansion tank 6, the first temperature sensor 7 is easier to arrange. Furthermore, the temperature detected by the first temperature sensor 7 can, on the one hand, indicate whether the temperature of the cooled coolant meets the cooling requirements of the engine, and on the other hand, facilitate the determination of the coolant level, which is beneficial to cost saving.
[0029] In the embodiments provided in this application, the coolant monitoring system further includes an oil cooler 8, an EGR cooler 9, a heater core 10, and a turbocharger 12, wherein: the third port of the thermostat 4 is connected to the inlet end of the oil cooler 8, the inlet end of the EGR cooler 9, and the inlet end of the heater core 10, respectively; the outlet end of the oil cooler 8, the outlet end of the EGR cooler 9, and the outlet end of the heater core 10 are all connected to the inlet end of the electric water pump 1; the outlet end of the cylinder block water jacket 2 is connected to the inlet end of the turbocharger 12, and the outlet end of the turbocharger 12 is connected to the inlet end of the electric water pump 1.
[0030] The thermostat 4 has a temperature sensor inside its cavity. When the coolant flowing out of the cylinder head water jacket 3 flows through the thermostat 4, the temperature sensor detects the temperature of the coolant. When the detected temperature is normal, the second port of the thermostat 4 is closed and the third port of the thermostat 4 is opened. The coolant flows through the third port of the thermostat 4 to the oil cooler 8, the EGR cooler 9 and the heater core 10 for heat exchange. After heat exchange, the coolant flows back to the cylinder block water jacket 2 under the action of the electric water pump 1.
[0031] When the temperature sensor inside the thermostat 4 detects that the coolant temperature is too high, the second port of the thermostat 4 opens, allowing the coolant to flow to the high-temperature radiator 5 for cooling, so as to ensure the normal operation of the system.
[0032] In one feasible implementation, a second temperature sensor 11 is provided at the third port of the thermostat 4. The coolant flowing out of the third port of the thermostat 4 is detected by the second temperature sensor 11, which can provide a more accurate temperature reading. This helps the thermostat 4 to control the flow of coolant more accurately, thereby regulating the system temperature more effectively to ensure that the engine operates within a safe temperature range.
[0033] In the embodiments provided in this application, the degassing pipe of the cylinder head water jacket 3 is connected to the inlet end of the expansion tank 6, and a first throttling orifice 13 is provided on the connecting pipe between the degassing pipe of the cylinder head water jacket 3 and the expansion tank 6, and a second throttling orifice 14 is provided on the connecting pipe between the degassing pipe of the high temperature radiator 5 and the expansion tank 6.
[0034] Whether under normal or high-temperature conditions, the coolant will expand due to heat when the engine is running. In order to prevent the coolant from overflowing from the system, under normal conditions, the heated and expanded coolant can enter the expansion tank 6 through the degassing pipe of the cylinder head water jacket 3. Under high-temperature conditions, the heated and expanded coolant can enter the expansion tank 6 through the degassing pipe of the cylinder head water jacket 3 and the degassing pipe of the high-temperature radiator 5 respectively.
[0035] In order to keep the system pressure balanced, it is necessary to prevent the coolant from flowing into the expansion tank 6 too quickly. Therefore, the flow rate and flow of the coolant are controlled by the first throttle orifice 13 and the second throttle orifice 14 respectively, so that the coolant flowing out of the degassing pipe of the cylinder head water jacket 3 and the degassing pipe of the high temperature radiator 5 can flow into the expansion tank 6 stably to ensure the system pressure balance.
[0036] The coolant monitoring system of this application, under small circulation conditions, includes the following coolant circulation routes:
[0037] 1. Electronic water pump 1 → Cylinder block water jacket 2 → Cylinder head water jacket 3 → Thermostat 4 chamber → Thermostat 4 temperature sensor → Main first temperature sensor 7 → Heater core 10 (module) → Electronic water pump 1 inlet.
[0038] 2. Electronic water pump 1 → Cylinder block water jacket 2 → Cylinder head water jacket 3 → Thermostat 4 chamber → Thermostat 4 temperature sensor → Main first temperature sensor 7 → EGR cooler 9 → Electronic water pump 1 inlet.
[0039] 3. Electronic water pump 1 → Cylinder block water jacket 2 → Cylinder head water jacket 3 → Thermostat 4 chamber → Thermostat 4 temperature sensor → Main first temperature sensor 7 → Oil cooler 8 → Electronic water pump 1 inlet.
[0040] 4. Electronic water pump 1 → Cylinder water jacket 2 → Intensifier water jacket → Cylinder water passage → Electronic water pump 1 inlet.
[0041] 5. Electronic water pump 1 → Cylinder block water jacket 2 → Cylinder head water jacket 3 → Cylinder head degassing pipe → Check valve → First throttle orifice 13 → Expansion tank 6 → Inlet of electronic water pump 1.
[0042] The coolant monitoring system of this application, under large circulation conditions, includes the following coolant circulation routes:
[0043] 1. Electronic water pump 1 → Cylinder block water jacket 2 → Cylinder head water jacket 3 → Thermostat 4 chamber → Thermostat 4 temperature sensor → Main first temperature sensor 7 → Heater core 10 (module) → Electronic water pump 1 inlet.
[0044] 2. Electronic water pump 1 → Cylinder block water jacket 2 → Cylinder head water jacket 3 → Thermostat 4 chamber → Thermostat 4 temperature sensor → Main first temperature sensor 7 → EGR cooler 9 → Electronic water pump 1 inlet.
[0045] 3. Electronic water pump 1 → Cylinder block water jacket 2 → Cylinder head water jacket 3 → Thermostat 4 chamber → Thermostat 4 temperature sensor → Main first temperature sensor 7 → Oil cooler 8 → Electronic water pump 1 inlet.
[0046] 4. Electronic water pump 1 → Cylinder water jacket 2 → Intensifier water jacket → Cylinder water passage → Electronic water pump 1 inlet.
[0047] 5. Electronic water pump 1 → Cylinder block water jacket 2 → Cylinder head water jacket 3 → Cylinder head degassing pipe → Check valve → First throttle orifice 13 → Expansion tank 6 → Inlet of electronic water pump 1.
[0048] 6. Electronic water pump 1 → Cylinder block water jacket 2 → Cylinder head water jacket 3 → Thermostat 4 chamber → Thermostat 4 temperature sensor → High temperature radiator 5 (built-in radiator outlet chamber top first temperature sensor 7) → Electronic water pump 1 inlet.
[0049] 7. Electronic water pump 1 → Cylinder block water jacket 2 → Cylinder head water jacket 3 → Thermostat 4 chamber → Thermostat 4 temperature sensor → High temperature radiator 5 (built-in radiator outlet chamber top first temperature sensor 7) → Degassing pipe → Second throttle hole 14 → Expansion tank 6 → Electronic water pump 1 inlet.
[0050] Secondly, this utility model provides a vehicle including the aforementioned coolant monitoring system. The coolant monitoring system monitors the coolant level, enabling the vehicle to understand the coolant status in real time under high-temperature conditions. When the coolant is insufficient, coolant can be added in time, effectively preventing engine failure due to insufficient coolant.
[0051] The above description, based on the embodiments shown in the drawings, details the structure, features, and effects of this utility model. The above description is only a preferred embodiment of this utility model, but the scope of implementation of this utility model is not limited to what is shown in the drawings. Any changes made in accordance with the concept of this utility model, or modifications to equivalent embodiments, that do not exceed the spirit covered by the specification and drawings, shall be within the protection scope of this utility model.
Claims
1. A coolant monitoring system, characterized in that, This includes an electric water pump, cylinder block water jacket, cylinder head water jacket, thermostat, high-temperature radiator, and expansion tank, among which: The outlet end of the electronic water pump is connected to the inlet end of the cylinder block water jacket, the outlet end of the cylinder block water jacket is connected to the inlet end of the cylinder head water jacket, the outlet end of the cylinder head water jacket is connected to the first port of the thermostat, the second port of the thermostat is connected to the inlet end of the high-temperature radiator, the outlet end of the high-temperature radiator is connected to the inlet end of the electronic water pump, the degassing pipe of the high-temperature radiator is connected to the inlet end of the expansion tank, and the outlet end of the expansion tank is connected to the inlet end of the electronic water pump. The high-temperature radiator includes a water outlet chamber, and a first temperature sensor is provided at the top of the water outlet chamber. The first temperature sensor is used to monitor the temperature of the coolant in order to determine the coolant level.
2. The coolant monitoring system according to claim 1, characterized in that, The coolant monitoring system also includes an oil cooler, the third port of the thermostat is connected to the inlet of the oil cooler, and the outlet of the oil cooler is connected to the inlet of the electronic water pump.
3. The coolant monitoring system according to claim 1, characterized in that, The coolant monitoring system also includes an EGR cooler, with the third port of the temperature controller connected to the inlet of the EGR cooler and the outlet of the EGR cooler connected to the inlet of the electronic water pump.
4. The coolant monitoring system according to claim 1, characterized in that, The coolant monitoring system also includes a heater core, the third port of the thermostat is connected to the inlet end of the heater core, and the outlet end of the heater core is connected to the electronic water pump.
5. The coolant monitoring system according to claim 1, characterized in that, A second temperature sensor is provided at the third port of the thermostat.
6. The coolant monitoring system according to claim 1, characterized in that, The coolant monitoring system also includes a turbocharger, the outlet end of the cylinder block water jacket is connected to the inlet end of the turbocharger, and the outlet end of the turbocharger is connected to the inlet end of the electric water pump.
7. The coolant monitoring system according to claim 1, characterized in that, The degassing pipe of the cylinder head water jacket is connected to the inlet end of the expansion tank.
8. The coolant monitoring system according to claim 7, characterized in that, The degassing pipe of the cylinder head water jacket and the expansion tank are provided with a first throttling orifice.
9. The coolant monitoring system according to claim 1, characterized in that, A second throttling orifice is provided on the connecting pipe between the degassing pipe of the high-temperature radiator and the expansion tank.
10. A vehicle, characterized in that, Includes the coolant monitoring system according to any one of claims 1 to 9.