Range extender and oil-cooled motor efficient duplex oil-way circulation structure
By using a highly efficient dual-loop oil circuit structure for the range extender and the oil-cooled motor, heat transfer and utilization between the range extender and the oil-cooled motor are realized. This solves the problem of ineffective heat utilization in independent oil circuit circulation systems, improves the thermal management efficiency and stability of the system, and reduces energy waste and maintenance costs.
Patent Information
- Application Number
- CN202520552841.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-26
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-03-26
AI Technical Summary
The independent oil circuit circulation system of the range-extended engine and the oil-cooled motor leads to the ineffective transfer and utilization of heat, resulting in energy waste and affecting system stability and lifespan.
It adopts a high-efficiency dual oil circuit circulation structure of range extender and oil-cooled motor. Through the coordinated work of fully variable oil pump and temperature sensor, heat transfer and utilization of oil between range extender and oil-cooled motor are realized. Combined with real-time monitoring and adjustment of fully variable oil pump control valve and temperature sensor.
It improves the system's thermal management efficiency, enhances system stability, reduces energy waste, lowers maintenance costs, and increases design flexibility.
Smart Images
Figure CN223825080U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the range extender and oil cooling motor oil circuit circulation technical field, concretely is a kind of range extender and oil cooling motor efficient duplex oil circuit circulation structure. BACKGROUND
[0002] In the current stage's range extension system, range extender engine and oil cooling motor are equipped with independent oil circuit circulation system respectively, under this design, engine oil flows in the oil circuit inside range extender engine and the oil circuit inside oil cooling motor respectively, not intercommunicate, specific performance is as follows: range extender engine and oil cooling motor each has independent engine oil pump, oil circuit and radiator system.
[0003] In range extender engine, engine oil is pumped from oil sump to each part of engine, lubricates and then carries heat to flow back to oil sump or radiator, oil cooling motor also has its independent engine oil pump, oil circuit and radiator system, engine oil carries heat to flow back to its own oil sump or radiator after lubrication, due to the isolation of oil circuit circulation, heat absorbed in the lubrication process of range extender engine and oil cooling motor cannot be effectively transmitted and utilized between two systems, and most of the heat carried by engine oil is directly dissipated to the external environment through the radiator of each system, lacking heat recovery mechanism, resulting in energy waste.
[0004] Heat loss caused by isolated oil circuit circulation reduces the overall thermal efficiency of the system. Thermal efficiency is an index for measuring energy utilization efficiency, the greater the heat loss, the lower the thermal efficiency of the system, in addition, this design can also cause range extender engine and oil cooling motor to have problems such as insufficient lubrication or overheating under different working conditions, affecting the stability and service life of the system. UTILITY MODEL CONTENTS
[0005] To solve the problems in the background art, the utility model provides a range extender and oil cooling motor efficient duplex oil circuit circulation structure.
[0006] To achieve the above-mentioned purpose, the utility model takes the following technical solutions: a range extender and oil cooling motor efficient duplex oil circuit circulation structure, comprising range extender, oil sump, first full variable engine oil pump, cylinder head lubrication channel, oil cooling motor, second full variable engine oil pump, motor oil pan, high-temperature engine oil outlet oil circuit, communication oil circuit, engine oil filter, engine oil cooler, temperature sensor and full variable engine oil pump control valve.
[0007] The range extender contains an oil pan, a first fully variable oil pump, and a cylinder head lubrication channel. The oil-cooled motor contains a second fully variable oil pump, a motor oil pan, and a high-temperature oil outlet circuit. The first fully variable oil pump is connected to an oil filter, the oil filter is connected to an oil cooler, and the oil cooler is connected to the coil cooling and lubrication channel of the oil-cooled motor via a connecting oil circuit. The motor oil pan is connected to the second fully variable oil pump, the second fully variable oil pump is connected to the high-temperature oil outlet circuit, and the high-temperature oil outlet circuit is connected to the cylinder head lubrication channel of the range extender. The temperature sensor is installed on the outer wall of the motor oil pan. Both the first and second fully variable oil pumps contain fully variable oil pump control valves, and each fully variable oil pump control valve is connected to the temperature sensor signal.
[0008] The high-temperature oil outlet circuit is connected to the cylinder head lubrication channel inlet of the range extender through an independent oil delivery pipeline, and the coil cooling lubrication channel of the oil-cooled motor does not require an independent pipeline, with low-temperature oil directly entering the coil to participate in cooling and lubrication.
[0009] Compared with the prior art, the beneficial effects of this utility model are:
[0010] 1. Improved thermal management efficiency: The dual oil circuit circulation design achieves efficient cooling of the range extender and oil-cooled motor. During the flow of the oil, it not only provides cooling and lubrication for the oil-cooled motor coils, but also transfers the absorbed heat to the cylinder head lubrication channel of the range extender, providing lubrication for the internal moving parts of the range extender and removing heat. This design makes full use of the heat capacity and fluidity of the oil, improving the overall thermal management efficiency of the system.
[0011] 2. Enhanced system stability: The coordinated operation of the fully variable oil pump control valve and temperature sensor enables the system to monitor and adjust oil temperature and flow in real time; under different operating conditions, the system can maintain stable performance and efficient thermal management, avoiding failures caused by overheating or insufficient lubrication, thereby enhancing system stability.
[0012] 3. Improved energy efficiency: This structure makes reasonable use of the heat of high-temperature engine oil; the high-temperature engine oil flowing from the oil-cooled motor is pumped into the cylinder head lubrication channel of the range extender to provide lubrication for the internal moving parts of the range extender; this design reduces energy waste because the heat of the high-temperature engine oil is effectively utilized; at the same time, the oil cooler cools the engine oil, further improving the system's energy efficiency.
[0013] 4. Reduced maintenance costs: Efficient thermal management and lubrication reduce system failures caused by overheating or insufficient lubrication; this means fewer repairs and parts replacements required, thus reducing maintenance costs; in addition, the recycling of engine oil also reduces oil waste and the frequency of oil changes.
[0014] 5. Increased design flexibility: The structure features a highly modular design, making it easy to adjust and optimize according to different operating conditions and needs. For example, by adjusting the speed and flow rate of the fully variable oil pump, the optimal lubrication and cooling effect can be achieved under different operating conditions. This design flexibility makes the structure suitable for a wider range of applications.
[0015] In summary, the high-efficiency dual-loop oil circuit structure of this range extender and oil-cooled motor has significant beneficial effects in improving thermal management efficiency, enhancing system stability, increasing energy efficiency, reducing maintenance costs, and increasing design flexibility. Attached Figure Description
[0016] Figure 1 This is a front view of the present invention. Detailed Implementation
[0017] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.
[0018] This embodiment describes a high-efficiency dual-loop oil circuit structure for a range extender and an oil-cooled motor, including a range extender 1, an oil pan 11, a first fully variable oil pump 12, a cylinder head lubrication channel 13, an oil-cooled motor 2, a second fully variable oil pump 21, an oil pan for the motor 22, a high-temperature oil outlet oil circuit 23, a connecting oil circuit 3, an oil filter 4, an oil cooler 5, a temperature sensor 6, and two fully variable oil pump control valves 7.
[0019] The range extender 1 is equipped with an oil pan 11, a first fully variable oil pump 12, and a cylinder head lubrication channel 13. The oil-cooled motor 2 is equipped with a second fully variable oil pump 21, a motor oil pan 22, and a high-temperature oil outlet passage 23. The first fully variable oil pump 12 is connected to an oil filter 4, and the oil filter 4 is connected to an oil cooler 5. The oil cooler 5 is connected to the coil cooling and lubrication channel of the oil-cooled motor 2 through a connecting oil passage 3. The motor oil pan 22 is connected to the second fully variable oil pump 21, and the second fully variable oil pump 21 is connected to the high-temperature oil outlet passage 23. The high-temperature oil outlet passage 23 is connected to the cylinder head lubrication channel 13 of the range extender 1. The temperature sensor 6 is installed on the outer wall of the motor oil pan 22. Both the first fully variable oil pump 12 and the second fully variable oil pump 21 are equipped with fully variable oil pump control valves 7, and each fully variable oil pump control valve 7 is signal-connected to the temperature sensor 6.
[0020] The high-temperature oil outlet oil passage 23 is connected to the cylinder head lubrication channel 13 inlet of the range extender 1 through an independent oil delivery pipeline, and the coil cooling lubrication channel of the oil-cooled motor 2 does not require an independent pipeline, and the low-temperature oil directly enters the coil to participate in cooling and lubrication.
[0021] When the system starts, the range extender 1 begins to work. At this time, the first fully variable oil pump 12 is activated, drawing oil from the oil pan 11 inside the range extender. The oil pan 11 serves as an oil reservoir, ensuring an adequate supply of oil. The first fully variable oil pump 12 pumps the drawn oil into the oil filter 4. The main function of the oil filter 4 is to filter out impurities in the oil, ensuring that the oil entering subsequent stages is clean, thereby protecting various parts of the system from wear and blockage. The filtered clean oil enters the oil cooler 5, which is responsible for... Cooling the engine oil to a preset temperature is crucial because cooled oil can more effectively absorb the heat generated by the oil-cooled motor 2 during operation. The cooled oil then enters the coil cooling and lubrication channel of the oil-cooled motor 2 through the connecting oil passage 3. This design allows the low-temperature oil to directly enter the motor coil, achieving efficient cooling and lubrication. During lubrication, the oil absorbs the heat generated by the motor coil, raising its temperature from the preset value to approximately 70-80°C. Subsequently, the heated oil flows back to the motor. The oil pan 22 completes one cooling and lubrication cycle for the motor coils. The high-temperature oil in the motor oil pan 22 is drawn by the second fully variable oil pump 21. The second fully variable oil pump 21 pumps the high-temperature oil through the high-temperature oil outlet oil passage 23 into the cylinder head lubrication passage 13 of the range extender 1. After entering the cylinder head lubrication passage 13 of the range extender, the high-temperature oil provides lubrication for the internal moving parts of the range extender and removes the heat generated during its operation. This step realizes the effective utilization and transfer of heat, improving the overall efficiency of the system. The oil passing through the cylinder head lubrication passage 13 of the range extender finally flows back to the oil pan 11. This process completes the circulation of oil in the entire system, forming a closed loop for thermal management of the dual oil circuit system. This closed loop design ensures the full utilization and efficient circulation of oil, and also helps to maintain the temperature balance and oil quality in the system. The temperature sensor 6 is installed on the outer wall of the motor oil pan 22 to monitor the temperature of the oil in the motor oil pan in real time. This monitoring data is crucial for the stable operation of the system. Each fully variable oil pump control valve 7 is connected to the temperature sensor 6. Based on the real-time temperature data provided by the temperature sensor 6, the fully variable oil pump control valve 7 can dynamically adjust the speed and flow rate of the first fully variable oil pump 12 and the second fully variable oil pump 21. This dynamic adjustment mechanism ensures that the system can maintain the best lubrication and cooling effect under different operating conditions.
[0022] This range extender and oil-cooled motor's high-efficiency dual-loop oil circulation structure achieves efficient oil utilization and thermal management through a meticulously designed oil circuit system and intelligent control mechanism. The system begins by drawing oil from the range extender's oil pan, then filters, cools, lubricates the motor, pumps the high-temperature oil to the range extender cylinder head lubrication channel, and finally returns it to the oil pan—a complete circulation process. Simultaneously, through the coordinated operation of a temperature sensor and a fully variable oil pump control valve, the system can monitor and adjust oil temperature and flow in real time, ensuring stable performance and efficient thermal management under various operating conditions.
[0023] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of the equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A high-efficiency dual-oil circuit circulation structure for a range extender and an oil-cooled motor, characterized in that: Includes a range extender (1), an oil pan (11), a first fully variable oil pump (12), a cylinder head lubrication passage (13), an oil-cooled motor (2), a second fully variable oil pump (21), an oil pan for the motor (22), a high-temperature oil outlet oil passage (23), a connecting oil passage (3), an oil filter (4), an oil cooler (5), a temperature sensor (6), and two fully variable oil pump control valves (7); The range extender (1) is equipped with an oil pan (11), a first fully variable oil pump (12), and a cylinder head lubrication channel (13). The oil-cooled motor (2) is equipped with a second fully variable oil pump (21), a motor oil pan (22), and a high-temperature oil outlet oil passage (23). The first fully variable oil pump (12) is connected to an oil filter (4). The oil filter (4) is connected to an oil cooler (5). The oil cooler (5) is connected to the coil cooling and lubrication channel of the oil-cooled motor (2) through a connecting oil passage (3). The motor oil pan (21) is connected to the cylinder head lubrication channel (13). 2) It is connected to the second fully variable oil pump (21), the second fully variable oil pump (21) is connected to the high temperature oil outlet oil passage (23), the high temperature oil outlet oil passage (23) is connected to the cylinder head lubrication passage (13) of the range extender (1), the temperature sensor (6) is installed on the outer wall of the motor oil pan (22), and the first fully variable oil pump (12) and the second fully variable oil pump (21) are each equipped with a fully variable oil pump control valve (7), and each of the fully variable oil pump control valves (7) is connected to the temperature sensor (6) for signal connection.
2. The high-efficiency dual-oil circuit circulation structure of range extender and oil-cooled motor according to claim 1, characterized in that: The high-temperature oil outlet oil passage (23) is connected to the cylinder head lubrication channel (13) inlet of the range extender (1) through an independent oil delivery pipeline, and the coil cooling lubrication channel of the oil-cooled motor (2) does not require an independent pipeline, and the low-temperature oil directly enters the coil to participate in cooling and lubrication.