Range extender and oil-cooled motor efficient duplex oil-way circulation structure and use method of range extender and oil-cooled motor efficient duplex oil-way circulation structure
By designing an efficient dual oil circuit circulation structure in the range extender and oil-cooled motor, the heat capacity and flowability of the engine oil are used to solve the problem that heat cannot be effectively transferred and utilized in the existing technology, and efficient thermal management and energy efficiency improvement are achieved.
Patent Information
- Application Number
- CN202510367084.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-26
- Publication Date
- 2025-06-06
AI Technical Summary
In the existing extended-range system, extended-range engines and oil-cooled motors are each equipped with independent oil circuit circulation systems, which leads to the inability to effectively transfer and utilize heat, resulting in waste of energy and inefficient thermal efficiency.
A high-efficiency dual oil circuit circulation structure of range extender and oil-cooled motor is designed. Through a fully variable oil pump and connected oil circuit, the circulating flow of engine oil between the range extender and oil-cooled motor is realized, and the heat capacity and flowability of engine oil are used to achieve efficient thermal management.
Through the dual oil circuit cycle design, the thermal management efficiency is improved, energy waste is reduced, the stability and energy efficiency of the system are enhanced, and the maintenance costs are reduced.
Smart Images
Figure CN120100561A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of oil circuit circulation of range extenders and oil-cooled motors, and specifically relates to a high-efficiency double-connected oil circuit circulation structure of a range extender and an oil-cooled motor and a use method thereof. Background Art
[0002] In the current stage of the range-extended system, the range-extended engine and the oil-cooled motor are each equipped with an independent oil circulation system. Under this design, the engine oil flows in the oil circuit inside the range-extended engine and the oil circuit inside the oil-cooled motor respectively, and are not connected to each other. The specific performance is as follows: the range-extended engine and the oil-cooled motor each have an independent oil pump, oil circuit and radiator system.
[0003] In an extended-range engine, the engine oil is pumped from the oil pan to various parts of the engine, and after lubrication, it flows back to the oil pan or radiator carrying heat. The oil-cooled motor also has its own independent oil pump, oil circuit and radiator system. After lubrication, the engine oil also flows back to its own oil pan or radiator carrying heat. Due to the isolation of the oil circuit circulation, the heat absorbed by the extended-range engine and the oil-cooled motor during the lubrication process cannot be effectively transferred and utilized between the two systems. Most of the heat carried by the oil is directly dissipated into the external environment through their respective radiators. There is a lack of heat recovery mechanism, resulting in energy waste.
[0004] The heat loss caused by the isolated oil circuit circulation reduces the overall thermal efficiency of the system. Thermal efficiency is an indicator of energy utilization efficiency. The greater the heat loss, the lower the thermal efficiency of the system. In addition, this design may also cause problems such as insufficient lubrication or overheating of the range-extended engine and oil-cooled motor under different working conditions, affecting the stability and life of the system. Summary of the invention
[0005] In order to solve the problems existing in the background technology, the present invention provides a high-efficiency dual-connected oil circuit circulation structure of a range extender and an oil-cooled motor and a use method thereof.
[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a high-efficiency dual oil circuit circulation structure of a range extender and an oil-cooled motor, comprising a range extender, an oil pan, a first fully variable oil pump, a cylinder head lubrication channel, an oil-cooled motor, a second fully variable oil pump, a motor oil pan, a high-temperature oil outlet oil circuit, a connecting oil circuit, an oil filter, an oil cooler, a temperature sensor and a fully variable oil pump control valve;
[0007] An oil pan, a first fully variable oil pump and a cylinder head lubrication passage are provided in the range extender; a second fully variable oil pump, a motor oil pan and a high-temperature oil outlet oil passage are provided in the oil-cooled motor; the first fully variable oil pump is communicated with an oil filter, the oil filter is communicated with an oil cooler, the oil cooler is communicated with a coil cooling lubrication passage of the oil-cooled motor through a communicating oil passage; the motor oil pan is communicated with a second fully variable oil pump, the second fully variable oil pump is communicated with a high-temperature oil outlet oil passage, the high-temperature oil outlet oil passage is communicated with the cylinder head lubrication passage of the range extender; the temperature sensor is installed on an outer wall of the motor oil pan; fully variable oil pump control valves are provided in the first fully variable oil pump and the second fully variable oil pump, and each of the fully variable oil pump control valves is connected to a temperature sensor signal.
[0008] The high-temperature oil outlet oil circuit is connected to the cylinder head lubrication channel inlet of the range extender through an independent oil pipeline, and the coil cooling and lubrication channel of the oil-cooled motor does not require an independent pipeline, and the low-temperature oil directly enters the coil to participate in cooling and lubrication.
[0009] The method comprises the following steps:
[0010] S1: Start the range extender, the first fully variable oil pump draws oil from the oil pan and pumps it into the oil filter, which filters out impurities in the oil;
[0011] S2: The filtered oil enters the oil cooler for cooling, so that the oil temperature drops to a preset value;
[0012] S3: The cooled oil enters the coil cooling and lubrication channel of the oil-cooled motor through the connecting oil path to cool and lubricate the motor coil. The oil absorbs heat during the lubrication process, and the temperature decreases from the preset value after cooling, and then flows back to the motor oil pan;
[0013] S4: The second fully variable oil pump pumps the high-temperature oil in the motor oil pan into the cylinder head lubrication channel of the range extender through the high-temperature oil outlet oil passage, providing lubrication for the internal moving parts of the range extender and taking away heat;
[0014] S5: The engine oil flows back to the oil pan through the cylinder head lubrication channel, forming a thermal management closed loop of the dual oil circuit system; the temperature sensor monitors the oil temperature in the motor oil pan in real time, and feeds back the signal to each fully variable oil pump control valve, and the fully variable oil pump control valve dynamically adjusts the speed and flow of the first fully variable oil pump and the second fully variable oil pump.
[0015] Compared with the prior art, the present invention has the following beneficial effects:
[0016] 1. Improve 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 engine oil, it not only provides cooling and lubrication for the oil-cooled motor coil, 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 taking away the heat. This design makes full use of the heat capacity and fluidity of the engine oil, improving the overall thermal management efficiency of the system.
[0017] 2. Enhanced system stability: The coordinated operation of the fully variable oil pump control valve and the temperature sensor enables the system to monitor and adjust the 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.
[0018] 3. Improve energy efficiency: This structure rationally utilizes the heat of high-temperature oil; the high-temperature oil flowing out of the oil-cooled motor is pumped into the cylinder head lubrication channel of the range extender to provide lubrication for the moving parts inside the range extender; this design reduces energy waste because the heat of the high-temperature oil is effectively utilized; at the same time, the oil cooler cools the oil, further improving the energy efficiency of the system.
[0019] 4. Reduce maintenance costs: Efficient thermal management and lubrication reduce system failures due to overheating or insufficient lubrication; this means less need for repairs and replacement of parts, thereby reducing maintenance costs; in addition, the recycling of engine oil also reduces oil waste and the frequency of replacement.
[0020] 5. Increase design flexibility: The structure has a highly modular design, which is easy to adjust and optimize according to different working conditions and needs; for example, by adjusting the speed and flow of the fully variable oil pump, the best lubrication and cooling effects under different working conditions can be matched; this design flexibility makes the structure suitable for a wider range of application scenarios.
[0021] In summary, the high-efficiency dual oil circuit circulation structure of the range extender and the oil-cooled motor has significant beneficial effects in improving thermal management efficiency, enhancing system stability, improving energy efficiency, reducing maintenance costs, and increasing design flexibility. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a front view of the present invention. DETAILED DESCRIPTION
[0023] The technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.
[0024] This embodiment describes a high-efficiency dual oil circuit circulation structure of 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, a motor oil pan 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;
[0025] An oil pan 11, a first fully variable oil pump 12 and a cylinder head lubrication passage 13 are provided in the range extender 1. A second fully variable oil pump 21, a motor oil pan 22 and a high-temperature oil outlet oil passage 23 are provided in the oil-cooled motor 2. The first fully variable oil pump 12 is communicated with an oil filter 4, and the oil filter 4 is communicated with an oil cooler 5. The oil cooler 5 is communicated with the coil cooling lubrication passage of the oil-cooled motor 2 through a connecting oil passage 3. The motor oil pan 22 is communicated with the second fully variable oil pump 21, and the second fully variable oil pump 21 is communicated with a high-temperature oil outlet oil passage 23. The high-temperature oil outlet oil passage 23 is communicated with 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. Fully variable oil pump control valves 7 are provided in the first fully variable oil pump 12 and the second fully variable oil pump 21, and each of the fully variable oil pump control valves 7 is connected to the temperature sensor 6 signal.
[0026] The high-temperature oil outlet oil circuit 23 is connected to the inlet of the cylinder head lubrication channel 13 of the range extender 1 through an independent oil pipeline, and the coil cooling and 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.
[0027] The method comprises the following steps:
[0028] S1: starting the range extender 1, the first fully variable oil pump 12 draws oil from the oil pan 11 and pumps it into the oil filter 4, and the oil filter 4 filters out impurities in the oil;
[0029] S2: The filtered oil enters the oil cooler 5 for cooling, so that the oil temperature drops to a preset value;
[0030] S3: The cooled oil enters the coil cooling and lubrication channel of the oil-cooled motor 2 through the connecting oil path 3 to cool and lubricate the motor coil. The oil absorbs heat during the lubrication process, and the temperature decreases from the preset value after cooling, and then flows back to the motor oil pan 22;
[0031] S4: The second fully variable oil pump 21 pumps the high-temperature oil in the motor oil pan 22 into the cylinder head lubrication channel 13 of the range extender 1 through the high-temperature oil outlet oil passage 23 to provide lubrication for the internal moving parts of the range extender and remove heat;
[0032] S5: The engine oil flows back to the oil pan 11 through the cylinder head lubrication channel 13, forming a thermal management closed loop of the dual oil circuit system; the temperature sensor 6 monitors the oil temperature in the motor oil pan 22 in real time, and feeds back the signal to each fully variable oil pump control valve 7, and the fully variable oil pump control valve 7 dynamically adjusts the speed and flow of the first fully variable oil pump 12 and the second fully variable oil pump 21.
[0033] When the system is started, the range extender 1 starts to work. At this time, the first fully variable oil pump 12 is activated, and it extracts oil from the oil pan 11 inside the range extender. The oil pan 11 serves as a reservoir for the oil to ensure sufficient supply of the oil. The first fully variable oil pump 12 pumps the extracted oil into the oil filter 4. The main function of the oil filter 4 is to filter out impurities in the oil to ensure that the oil entering the subsequent links 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 The oil is cooled to a preset temperature. This step is crucial because the cooled oil can more effectively absorb the heat generated by the oil-cooled motor 2 during operation. The cooled oil enters the coil cooling and lubrication channel of the oil-cooled motor 2 through the connecting oil path 3. This design allows the low-temperature oil to directly enter the motor coil to achieve efficient cooling and lubrication. During the lubrication process, the oil absorbs the heat generated by the motor coil, and its temperature rises from the preset value after cooling to about 70-80°C. Subsequently, the heated oil flows back to the motor. The oil pan 22 completes a cooling and lubrication cycle for the motor coil. The high-temperature oil in the motor oil pan 22 is extracted by the second fully variable oil pump 21. The second fully variable oil pump 21 pumps the high-temperature oil into the cylinder head lubrication channel 13 of the range extender 1 through the high-temperature oil outlet oil circuit 23. After the high-temperature oil enters the cylinder head lubrication channel 13 of the range extender, it provides lubrication for the internal moving parts of the range extender and takes away the heat generated during its operation. This step realizes the effective utilization and transfer of heat and improves the overall efficiency of the system. The oil passing through the cylinder head lubrication channel 13 of the range extender finally flows back to the oil pan 11. This process completes the circulation of the oil in the entire system and forms a thermal management closed loop of the dual oil circuit system. This closed-loop design ensures full utilization and efficient circulation of the 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 to the stable operation of the system. Each fully variable oil pump control valve 7 is connected to the temperature sensor 6 signal. According to 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 optimal lubrication and cooling effects under different working conditions.
[0034] The high-efficiency dual oil circuit circulation structure of the range extender and oil-cooled motor achieves efficient use of oil and heat management through a carefully designed oil circuit system and intelligent control mechanism. The system starts with extracting oil from the range extender oil pan, filtering, cooling, lubricating the motor, pumping high-temperature oil to the range extender cylinder head lubrication channel, and then returning to the oil pan. At the same time, through the coordinated work of the temperature sensor and the fully variable oil pump control valve, the system can monitor and adjust the oil temperature and flow in real time to ensure stable performance and efficient thermal management under different working conditions.
[0035] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other forms of assembly without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-restrictive, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations within the meaning and range of equivalents of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.
Claims
1. A high-efficiency double oil circuit circulation structure for a range extender and an oil-cooled motor, characterized in that: It comprises a range extender (1), an oil pan (11), a first fully variable oil pump (12), a cylinder head lubrication channel (13), an oil cooling motor (2), a second fully variable oil pump (21), a motor oil pan (22), a high-temperature oil outlet oil path (23), a connecting oil path (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 provided with an oil pan (11), a first fully variable oil pump (12) and a cylinder head lubrication passage (13); the oil-cooled motor (2) is provided 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 a coil cooling lubrication passage of the oil-cooled motor (2) via a connecting oil passage (3); the motor oil pan (2 2) is connected to a second fully variable oil pump (21), the second fully variable oil pump (21) is connected to a high-temperature oil outlet oil circuit (23), the high-temperature oil outlet oil circuit (23) is connected to a 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), and the first fully variable oil pump (12) and the second fully variable oil pump (21) are both provided 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) signal.
2. According to claim 1, a high-efficiency dual oil circuit circulation structure of a range extender and an oil-cooled motor, characterized in that: The high-temperature oil outlet oil circuit (23) is connected to the inlet of the cylinder head lubrication channel (13) of the range extender (1) through an independent oil 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.
3. A method for using a high-efficiency dual oil circuit circulation structure of a range extender and an oil-cooled motor according to claim 1, characterized in that: The method comprises the following steps: S1: starting the range extender (1), the first fully variable oil pump (12) extracts oil from the oil pan (11) and pumps the oil into the oil filter (4), and the oil filter (4) filters out impurities in the oil; S2: The filtered oil enters the oil cooler (5) for cooling, so that the oil temperature drops to a preset value; S3: The cooled oil enters the coil cooling and lubrication channel of the oil-cooled motor (2) through the connecting oil path (3) to cool and lubricate the motor coil. The oil absorbs heat during the lubrication process and the temperature decreases from the preset value after cooling. The oil then flows back to the motor oil pan (22); S4: The second fully variable oil pump (21) pumps the high-temperature oil in the motor oil pan (22) into the cylinder head lubrication channel (13) of the range extender (1) through the high-temperature oil outlet oil passage (23), thereby providing lubrication for the internal moving parts of the range extender and removing heat; S5: The engine oil flows back to the oil pan (11) through the cylinder head lubrication channel (13), forming a thermal management closed loop of the dual oil circuit system; the temperature sensor (6) monitors the engine oil temperature in the motor oil pan (22) in real time, and feeds back the signal to each fully variable oil pump control valve (7), and the fully variable oil pump control valve (7) dynamically adjusts the rotation speed and flow rate of the first fully variable oil pump (12) and the second fully variable oil pump (21).