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CN-122014841-A - Cooling and lubricating system, vehicle and control method of cooling and lubricating system

CN122014841ACN 122014841 ACN122014841 ACN 122014841ACN-122014841-A

Abstract

The invention provides a cooling and lubricating system, a vehicle and a control method of the cooling and lubricating system, wherein the system comprises an oil pan and a conveying pipeline, an inlet end of the conveying pipeline is communicated with the oil pan, a power element, a filtering element, a driving element, a heat exchange element and a speed reduction element are sequentially arranged on the conveying pipeline along the conveying direction of lubricating oil, an outlet end of the conveying pipeline is communicated with the oil pan, a temperature detection piece is arranged between the filtering element and the driving element to detect the real-time temperature of the lubricating oil after filtering by the filtering element, and a controller is connected with the temperature detection piece to control at least one of the rotating speed of the power element, the rotating speed of the driving element, the rotating speed of the speed reduction element and the heat exchange efficiency of the driving element according to the real-time temperature, so that the problems of complex system, huge volume and the like caused by the fact that the cooling and the lubricating of a motor and the speed reduction device in the prior art still adopt independent double-loop design are solved.

Inventors

  • JIA YI
  • DUAN YU
  • ZHANG HAIYAN
  • LI QING
  • DUAN QIMENG

Assignees

  • 潍柴动力股份有限公司

Dates

Publication Date
20260512
Application Date
20260407

Claims (10)

  1. 1. A cooling and lubrication system adapted for an electrically driven bridge, the cooling and lubrication system comprising: The oil pan comprises an oil pan body (1) and a conveying pipeline, wherein the inlet end of the conveying pipeline is communicated with the oil pan body (1); the power element (2), the filtering element (3), the driving element (4), the heat exchange element (5) and the speed reduction element (6) are sequentially arranged on the conveying pipeline along the conveying direction of lubricating oil, and the outlet end of the conveying pipeline is communicated with the oil pan (1); a temperature detecting member (7) provided between the filter element (3) and the driving element (4) to detect a real-time temperature of the lubricating oil after filtration from the filter element (3); And the controller (8) is connected with the temperature detection piece (7) and used for controlling at least one of the rotating speed of the power element (2), the rotating speed of the driving element (4), the rotating speed of the speed reduction element (6) and the heat exchange efficiency of the heat exchange element (5) according to the real-time temperature.
  2. 2. The cooling and lubrication system according to claim 1, wherein the heat exchange element (5) comprises a heat exchange body (51) and a cooling component (52), the cooling component (52) has a liquid inlet and a liquid outlet, the heat exchange body (51) has a first heat exchange channel and a second heat exchange channel which are mutually independent, two ends of the first heat exchange channel are respectively communicated with the conveying pipeline, and two ends of the second heat exchange channel are respectively communicated with the liquid inlet and the liquid outlet so as to dissipate heat of the lubricating oil in the conveying pipeline through the heat exchange body (51).
  3. 3. A vehicle comprising a cooling and lubrication system, characterized in that the cooling and lubrication system is as claimed in any one of claims 1 to 2.
  4. 4. A control method of a cooling and lubrication system, the control method being applied to the cooling and lubrication system according to any one of claims 1 to 2, characterized by comprising: After the electricity of the electric drive bridge is judged, the real-time temperature of the lubricating oil which is in the cooling and lubricating system and is filtered by the filtering element (3) is obtained, so that the working mode of the electric drive bridge is determined according to the real-time temperature, and the working state of at least one of the power element (2), the driving element (4), the heat exchange element (5) and the speed reduction element (6) in the cooling and lubricating system is adjusted according to the working mode.
  5. 5. The method of claim 4, wherein the step of determining the operation mode of the electrically driven bridge based on the real-time temperature comprises: when the real-time temperature is in a first temperature range, determining that the electric drive bridge is in a cold start forced heating mode; when the real-time temperature is in a second temperature range, determining that the electric drive bridge is in a cold start mode; when the real-time temperature is in a third temperature range, determining that the electric drive bridge is in a standard working mode; when the real-time temperature is in a fourth temperature range, determining that the electric drive bridge is in an error reporting mode; The viscosity of the lubricating oil is larger than or equal to a first viscosity value when the lubricating oil is in the cold start forced heating mode, is larger than or equal to a second viscosity value and smaller than the first viscosity value when the lubricating oil is in the cold start mode, is larger than a third viscosity value and smaller than or equal to a fourth viscosity value when the lubricating oil is in the standard working mode, and is smaller than or equal to the third viscosity value when the lubricating oil is in the error reporting mode.
  6. 6. The method of claim 5, wherein the step of determining that the electrically driven bridge is in a cold start forced heating mode further comprises: Controlling the rotation of the driving element (4) and the neutral position of the reduction element (6) for heat generation to increase the temperature of the lubricating oil, and/or, And controlling the cooling liquid in a cooling part (52) in the cooling and lubricating system to be conveyed into a second heat exchange pipeline in the heat exchange element (5) so as to exchange heat with the lubricating oil in a first heat exchange pipeline in the heat exchange element (5) to increase the temperature of the lubricating oil.
  7. 7. The control method of a cooling and lubrication system according to claim 5, wherein after the step of determining that the electric drive bridge is in a cold start mode, the control method further includes: -controlling the power element (2) to operate at maximum rotational speed to lubricate the driving element (4) and the reduction element (6).
  8. 8. The method of controlling a cooling and lubrication system according to claim 5, wherein after the step of determining that the electric drive bridge is in a standard operation mode, the method further comprises: When the real-time temperature is in a fifth temperature range, determining that the electric drive bridge is in a first heating working condition; When the real-time temperature is in a sixth temperature range, determining that the electric drive bridge is in a second heating working condition; when the real-time temperature is in a seventh temperature range, determining that the electric drive bridge is in a third heating working condition; The real-time rotating speed of the power element (2) is in a first preset range when the power element is in the first heating working condition, the real-time rotating speed of the power element (2) is in a second preset range when the power element is in the second heating working condition, the real-time rotating speed of the power element (2) is in a third preset range when the power element is in the third heating working condition, the fifth temperature range is smaller than the sixth temperature range, and the sixth temperature range is smaller than the seventh temperature range.
  9. 9. The method for controlling a cooling and lubrication system according to claim 8, wherein, After the step of determining that the electrically driven bridge is in the first heat generating condition, the control method further comprises controlling the power element (2) to operate at a minimum rotational speed, and/or, After the step of determining that the electric drive bridge is in the second heating condition, the control method further comprises controlling the power element (2) to operate at a minimum rotation speed and simultaneously controlling to increase the flow of cooling water entering the heat exchange element (5) by a set step length, and/or, After the step of determining that the electric drive bridge is in the third heating working condition, the control method further comprises controlling the power element (2) to operate at the minimum rotation speed and simultaneously controlling cooling water to enter the heat exchange element (5) at the maximum flow speed.
  10. 10. The control method of a cooling and lubrication system according to claim 5, wherein after the step of determining that the electric drive bridge is in the error reporting mode, the control method further includes: and controlling the power element (2) to operate at the maximum rotating speed, and controlling cooling water to enter the driving element (4) at the maximum flow rate so as to cool the lubricating oil.

Description

Cooling and lubricating system, vehicle and control method of cooling and lubricating system Technical Field The application relates to the technical field of vehicles, in particular to a cooling and lubricating system, a vehicle and a control method of the cooling and lubricating system. Background Compared with the traditional axle, the electric drive axle has the advantages that the motor is directly integrated inside the axle housing, the length of a transmission chain is obviously shortened, and the transmission efficiency of the system is improved. However, limited by the severe constraints of the overall vehicle space layout, the electro-drive bridge puts higher demands on structural integration. In the current mainstream technical scheme, the cooling lubrication of the motor and the speed reducer still adopts an independent double-loop design, and is respectively provided with an independent oil pump, a filter, a pipeline and a heat exchanger, and lubricating oil with different viscosity and performance characteristics is used. The structure causes the problems of large number of parts, complex system, huge volume, low cooling and lubricating efficiency, increased power consumption, increased cost, difficult maintenance and the like due to non-uniform oil products and thermal management cracking. Disclosure of Invention The invention mainly aims to provide a cooling and lubricating system, a vehicle and a control method of the cooling and lubricating system, so as to solve the problems of complex system, huge volume and the like caused by the fact that independent double-loop design is still adopted for cooling and lubricating of a motor and a speed reducer in the prior art. In order to achieve the above object, according to one aspect of the present invention, there is provided a cooling and lubrication system adapted to an electric drive axle, the cooling and lubrication system including an oil pan and a delivery pipe, an inlet end of the delivery pipe being in communication with the oil pan, a power element, a filter element, a drive element, a heat exchange element, and a speed reduction element each being sequentially disposed on the delivery pipe in a delivery direction of lubricating oil, an outlet end of the delivery pipe being in communication with the oil pan, a temperature detecting member disposed between the filter element and the drive element to detect a real-time temperature of the lubricating oil after filtration from the filter element, and a controller connected to the temperature detecting member to control at least one of a rotational speed of the power element, a rotational speed of the drive element, a rotational speed of the speed reduction element, and a heat exchange efficiency of the heat exchange element according to the real-time temperature. Further, the heat exchange element comprises a heat exchange body and a cooling part, the cooling part is provided with a liquid inlet and a liquid outlet, the heat exchange body is provided with a first heat exchange channel and a second heat exchange channel which are mutually independent, two ports of the first heat exchange channel are respectively communicated with the conveying pipeline, and two ports of the second heat exchange channel are respectively communicated with the liquid inlet and the liquid outlet so as to radiate heat of lubricating oil in the conveying pipeline through the heat exchange body. According to another aspect of the present invention, there is provided a vehicle comprising the cooling and lubrication system described above. According to another aspect of the present invention, there is provided a control method of a cooling and lubrication system, the control method being applicable to the cooling and lubrication system described above, the control method including, after determining that an electric drive bridge is powered on, acquiring a real-time temperature of lubricating oil filtered by a filter element in the cooling and lubrication system, so as to determine an operation mode of the electric drive bridge according to the real-time temperature, and adjusting an operation state of at least one of a power element, a driving element, a heat exchange element, and a speed reduction element in the cooling and lubrication system according to the operation mode. Further, the step of determining the working mode of the electric drive bridge according to the real-time temperature comprises the steps of determining that the electric drive bridge is in a cold start forced heating mode when the real-time temperature is in a first temperature range, determining that the electric drive bridge is in a cold start mode when the real-time temperature is in a second temperature range, determining that the electric drive bridge is in a standard working mode when the real-time temperature is in a third temperature range, determining that the electric drive bridge is in an error reporting mode when the real-time temper