Novel hybrid power gearbox hydraulic system

Abstract

The utility model belongs to the technical field of hybrid power assemblies, in particular to a novel hybrid power gearbox hydraulic system which comprises a lubricating and cooling subsystem and an execution subsystem, the lubricating and cooling subsystem comprises an oil tank, a first suction filter, a first electronic pump, an oil cooler and a plurality of cooling and lubricating throttling holes, the multiple cooling and lubricating throttling holes are connected with the oil cooler through pipelines, the oil cooler is connected with the first electronic pump through a pipeline, the first electronic pump is connected with the first suction filter through a pipeline, and the first suction filter is connected with the oil tank through a pipeline. The execution subsystem comprises a second suction filter, a second electronic pump and a clutch; the second electronic pump does not work in a pure electric mode of the hybrid gearbox; and in the hybrid mode, low-rotating-speed operation can be controlled. Intermittent work of the second electronic pump is achieved, the efficiency of the whole system is improved, the service life of the second electronic pump is prolonged, and it is guaranteed that the whole gearbox can work stably within the designed service life.

Description

Technical Field

[0001] The utility model relates to the technical field of hybrid power assembly, in particular to a novel hybrid power transmission hydraulic system. Background Art

[0002] With the continuous advancement of new energy vehicles, the hybrid system, as a form in the field of new energy vehicles, has also seen an increasing market demand year by year. There are a variety of layouts in the design of hybrid systems, and the hydraulically controlled wet clutch is a more mature form, which can meet multiple driving conditions such as pure electric driving, series driving, high-speed engine direct drive, parallel driving, etc., so that both the motor and the engine drive elements are in an efficient working state, ultimately achieving the goal of low fuel consumption, low emissions, and high mileage. It has good power and economy, and the cost is relatively low.

[0003] The existing electronic pump works continuously, which greatly affects the service life of the electronic pump, and the existing solenoid valve has the risk of getting stuck.

[0004] In order to solve the above problems, a novel hybrid power transmission hydraulic system is proposed in the present application. Utility Model Content

[0005] (I) Purpose of the utility model

[0006] In order to solve the technical problems existing in the background technology, the utility model proposes a novel hybrid power transmission hydraulic system.

[0007] (II) Technical solution

[0008] In order to solve the above problems, the utility model provides a novel hybrid power transmission hydraulic system, including a lubrication and cooling subsystem and an execution subsystem, wherein the lubrication and cooling subsystem includes an oil tank, a first suction filter, a first electronic pump, an oil cooler and a plurality of cooling and lubrication throttle holes, wherein the plurality of cooling and lubrication throttle holes are connected to the oil cooler through pipelines, the oil cooler is connected to the first electronic pump through pipelines, the first electronic pump is connected to the first suction filter through pipelines, and the first suction filter is connected to the oil tank through pipelines;

[0009] The execution subsystem includes a second suction filter, a second electronic pump and a clutch, wherein the clutch is connected to the second electronic pump through a pipeline, the second electronic pump is connected to the second suction filter through a pipeline, and the second suction filter is connected to the oil tank through a pipeline.

[0010] Furthermore, the execution subsystem also includes an accumulator, and the accumulator is installed on a pipeline between the clutch and the second electronic pump through a pipeline.

[0011] Furthermore, the execution subsystem further includes a pressure sensor, and the pressure sensor is installed on a pipeline between the clutch and the second electronic pump through a pipeline.

[0012] Furthermore, a temperature sensor is installed in the oil tank.

[0013] Furthermore, three cooling and lubrication throttling holes are provided, which are respectively connected to the LUB oil circuit, the EM1 oil circuit and the EM2 oil circuit through pipelines.

[0014] The above technical solution of the utility model has the following beneficial technical effects:

[0015] The second electronic pump of the utility model does not need to work in the pure electric mode of the hybrid transmission; in the hybrid mode, it can work at a controlled low speed. The intermittent operation of the second electronic pump not only improves the efficiency of the entire system, but also increases the life of the second electronic pump, ensuring that the entire transmission can work stably within the design life.

[0016] The lubrication and cooling subsystem of the utility model controls the flow of each cooling and lubrication point through the throttle hole and the speed of the first electronic pump, has a simple and reliable structure, is easy to control, has a low cost, and can achieve high economic efficiency.

[0017] In the execution subsystem of the utility model, the clutch control can be realized by the forward and reverse rotation of the second electronic pump and the speed control of the pump, and the electromagnetic valve is not used for control, thus avoiding the risk of electromagnetic valve jam. The subsystem is provided with a pressure sensor to realize closed-loop control; the subsystem is provided with an accumulator, and the pressure control is stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model is a structural schematic diagram of a novel hybrid power transmission hydraulic system.

[0019] In the figure:

[0020] 1. Lubrication and cooling subsystem; 101. Oil cooler; 102. First electronic pump; 103. First suction filter; 104. Oil tank; 105. Cooling and lubrication throttle hole; 106. LUB oil circuit; 107. EM1 oil circuit; 108. EM2 oil circuit; 2. Execution subsystem; 201. Clutch; 202. Pressure sensor; 203. Accumulator; 204. Second electronic pump; 205. Second suction filter; 206. Temperature sensor. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0022] like Figure 1 As shown, a novel hybrid power transmission hydraulic system proposed in the utility model includes a lubrication and cooling subsystem 1 and an execution subsystem 2, wherein the lubrication and cooling subsystem 1 includes an oil tank 104, a first suction filter 103, a first electronic pump 102, an oil cooler 101 and a plurality of cooling and lubrication throttle holes 105, wherein the plurality of cooling and lubrication throttle holes 105 are connected to the oil cooler 101 through a pipeline, the oil cooler 101 is connected to the first electronic pump 102 through a pipeline, the first electronic pump 102 is connected to the first suction filter 103 through a pipeline, and the first suction filter 103 is connected to the oil tank 104 through a pipeline;

[0023] The execution subsystem 2 includes a second suction filter 205, a second electronic pump 204 and a clutch 201, wherein the clutch 201 is connected to the second electronic pump 204 through a pipeline, the second electronic pump 204 is connected to the second suction filter 205 through a pipeline, and the second suction filter 205 is connected to the oil tank 104 through a pipeline.

[0024] In this embodiment, it should be noted that Figure 1 As shown, the execution subsystem 2 further includes an accumulator 203 , and the accumulator 203 is installed on a pipeline between the clutch 201 and the second electronic pump 204 through a pipeline.

[0025] In this embodiment, it should be noted that Figure 1 As shown, the execution subsystem 2 further includes a pressure sensor 202 , and the pressure sensor 202 is installed on a pipeline between the clutch 201 and the second electronic pump 204 through a pipeline.

[0026] In this embodiment, it should be noted that Figure 1 As shown, a temperature sensor 206 is installed in the oil tank 104 .

[0027] In this embodiment, it should be noted that Figure 1 As shown, three cooling and lubrication throttling holes 105 are provided, which are respectively connected to the LUB oil circuit 106, the EM1 oil circuit 107 and the EM2 oil circuit 108 through pipelines.

[0028] When working, the first electronic pump 102 sucks oil from the oil tank 104 through the first suction filter 103. The first suction filter 103 mainly plays the role of filtering impurities in the cooling lubricating oil, so that the cleanliness of the oil supplied to each cooling and lubricating point of the lubrication cooling system can meet the requirements. The rotation speed of the first electronic pump 102 is adjusted according to the flow rate of the lubrication cooling point with the largest cooling and lubrication amount among the lubrication cooling points in the hybrid system. After the lubrication cooling oil passes through the first electronic pump 102, it reaches each cooling and lubrication point after passing through the oil cooler 101. In this subsystem, the oil cooler 101 can adopt an air-cooled oil cooler 101 or a water-oil interactive oil cooler 101. The main function is to cool the oil in the lubrication system. The temperature of the oil passing through the oil cooler 101 is lower, so that the cooling effect reaching the cooling points EM1, EM2, and the clutch 201 is better, and at the same time, the entire gearbox works within a reasonable temperature range. The flow distribution of EM1, EM2, clutch 201 and the bearings, gears, etc. of each active lubrication point is controlled and distributed through the throttle holes set at each lubrication cooling point;

[0029] The second electronic pump 204 sucks oil from the oil tank 104 through the second suction filter 205, and then supplies oil to the subsystem. The main function of the second suction filter 205 is to filter impurities in the oil in the execution subsystem 2. Prevent impurities in the oil from entering the second electronic pump 204, causing abnormal wear of the second electronic pump 204. The pressure of the clutch 201 of the subsystem is regulated by controlling the speed of the second electronic pump 204. When the second electronic pump 204 rotates forward, the clutch 201 is closed; when the second electronic pump 204 rotates reversely, the clutch 201 is separated. When the second electronic pump 204 rotates forward, by adjusting its speed, the oil input flow of the subsystem is adjusted, and the pressure of the clutch 201 is controlled. By controlling the pressure of the clutch 201, the slip, engagement and continuous and stable transmission of different torques of the clutch 201 are controlled. In the process of clutch slip, a throttle hole for cooling and lubricating the clutch is set in the LUB oil circuit. The cooling lubricating oil provides cooling for the clutch through the set throttle hole to ensure that the clutch can work normally and stably within a reasonable temperature range. The second electronic pump 204 reverses to drain oil, and the clutch 201 is separated. When the clutch 201 is engaged, the engine intervenes to work, and the torque and speed are transmitted to the gearbox through the clutch 201, and the gearbox works in the hybrid mode. After the clutch 201 is separated, the engine quits working, the second electronic pump 204 stops reversing and stops working, and the gearbox works in the pure electric drive mode. During the operation of the second electronic pump 204, the pressure sensor 202 provided in the subsystem provides a pressure signal for the TCU and a closed-loop signal for the speed control of the second electronic pump 204; the accumulator 203 provided in the subsystem absorbs the pressure fluctuations or pressure shocks generated during the operation of the second electronic pump 204, or provides supplementary oil when the oil is insufficient, so as to provide stable pressure for the slip, engagement and stable transmission torque of the clutch 201.

[0030] At the same time, the system is also provided with a temperature sensor 206 in the oil tank 104 for monitoring the oil temperature of the hybrid transmission. Since the viscosity of the oil of the hybrid transmission is different at different temperatures, the speed of the electronic pump is limited by its own power, and the speed is different at different temperatures. In addition, the volumetric efficiency of the electronic pump is different at different temperatures, and the flow rate is also different. Therefore, the temperature sensor 206 is provided to provide closed-loop control for the speed control of the first electronic pump 102 and the second electronic pump 204 according to the pressure flow characteristics of the first electronic pump 102 and the second electronic pump 204 at different temperatures.

[0031] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A novel hybrid transmission hydraulic system, comprising a lubrication and cooling subsystem (1) and an execution subsystem (2), characterized in that: The lubrication and cooling subsystem (1) comprises an oil tank (104), a first suction filter (103), a first electronic pump (102), an oil cooler (101) and a plurality of cooling and lubrication throttle holes (105); the plurality of cooling and lubrication throttle holes (105) are connected to the oil cooler (101) via pipelines; the oil cooler (101) is connected to the first electronic pump (102) via pipelines; the first electronic pump (102) is connected to the first suction filter (103) via pipelines; and the first suction filter (103) is connected to the oil tank (104) via pipelines; The execution subsystem (2) comprises a second suction filter (205), a second electronic pump (204) and a clutch (201); the clutch (201) is connected to the second electronic pump (204) via a pipeline; the second electronic pump (204) is connected to the second suction filter (205) via a pipeline; and the second suction filter (205) is connected to the oil tank (104) via a pipeline.

2. A novel hybrid power transmission hydraulic system according to claim 1, characterized in that: The execution subsystem (2) further comprises an accumulator (203), wherein the accumulator (203) is installed on a pipeline between the clutch (201) and the second electronic pump (204) via a pipeline.

3. A novel hybrid power transmission hydraulic system according to claim 2, characterized in that: The execution subsystem (2) further comprises a pressure sensor (202), wherein the pressure sensor (202) is installed on a pipeline between the clutch (201) and the second electronic pump (204) through a pipeline.

4. A novel hybrid power transmission hydraulic system according to claim 3, characterized in that: A temperature sensor (206) is installed in the oil tank (104).

5. A novel hybrid power transmission hydraulic system according to claim 4, characterized in that: Three cooling and lubrication throttle holes (105) are provided, which are respectively connected to the LUB oil circuit (106), the EM1 oil circuit (107) and the EM2 oil circuit (108) through pipelines.

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