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CN-121993579-A - Method for operating a supply system and supply system

CN121993579ACN 121993579 ACN121993579 ACN 121993579ACN-121993579-A

Abstract

The invention relates to a method for operating a supply system and to a supply system, in which method components of a drive system are supplied with lubricant and/or coolant, wherein an electrically driven transfer pump is operated during normal operation of the drive system, and whereby the lubricant and/or coolant is transferred to the components in the supply system by the electrically driven transfer pump. During a special operation, in which the electrically driven transfer pump is switched off during operation of the drive system, at least some of the components are supplied with lubricant and/or coolant in the supply system only by the mechanically driven transfer pump, wherein the mechanically driven transfer pump is driven for its operation by the output drive of the motor vehicle drive train comprising the drive system. In this case, the mechanically driven delivery pump delivers only a minimum quantity during its operation, which corresponds to the minimum requirement for supplying at least some of the components.

Inventors

  • Sebastian Heine
  • Marcus Azeller
  • ROLAND MEYER
  • ACKER ANDREAS

Assignees

  • 采埃孚股份公司

Dates

Publication Date
20260508
Application Date
20251028
Priority Date
20241104

Claims (10)

  1. 1. Method for operating a supply system (10; 20), in which components (11, 12, 13, 14) of a drive system (9) are supplied with lubricant and/or coolant, wherein an electrically driven transfer pump (15) is operated during normal operation of the drive system (9), and whereby lubricant and/or coolant is transferred in the supply system (10; 20) to the components (11, 12, 13, 14) by means of the electrically driven transfer pump (15), and wherein, during a special operation in which the electrically driven transfer pump (15) is shut off during operation of the drive system (9), at least part of the components (11, 12, 13, 14) is supplied with lubricant and/or coolant in the supply system (10; 20) only by means of a mechanically driven transfer pump (16), characterized in that the mechanically driven transfer pump (16) is supplied for its operation by means of a driven device (18) of a motor vehicle drive train (2) comprising the drive system (9), and that at least part of the mechanically driven transfer pump (16) is required for its operation by means of the drive pump (16) is supplied only to a minimum of the components (11, 14).
  2. 2. Method according to claim 1, characterized in that the mechanically driven transfer pump (16) is operated in addition to the electrically driven transfer pump (15) during normal operation.
  3. 3. Method according to claim 1, characterized in that the mechanically driven transfer pump (16) is decoupled from the driven device (18) during normal operation and is thereby switched off.
  4. 4. A method according to claim 3, characterized in that the disconnection of the mechanically driven delivery pump (16) is performed in dependence of the pressure in the supply system (10; 20) and/or by means of an actuator.
  5. 5. Method according to any of the preceding claims, characterized in that during the special operation only the parts (11, 14) of the parts (11, 12, 13, 14) that have to be continuously supplied in operation of the drive system (9) are supplied.
  6. 6. Method according to any of the preceding claims, characterized in that during normal operation, on-demand delivery is performed by the electrically driven delivery pump (15).
  7. 7. A supply system (10; 20) in which components (11, 12, 13, 14) of a drive system (9) can be supplied with lubricant and/or coolant, wherein an electrically driven transfer pump (15) and a mechanically driven transfer pump (16) are provided, wherein the electrically driven transfer pump (15) transfers lubricant and/or coolant to the components (11, 12, 13, 14) during normal operation of the drive system (9) in the supply system (10; 20), and wherein the mechanically driven transfer pump (16) supplies lubricant and/or coolant only to at least part of the components (11, 14) during a special operation in which the electrically driven transfer pump (15) is shut off when the drive system (9) is operated, characterized in that the mechanically driven transfer pump (16) is driven by a driven device (18) of a motor vehicle drive train (2) comprising the drive system (9) and that the transfer pump (16) is required to supply only a small amount of at least part of the components (11, 14) in order to drive the components (11, 14) thereof.
  8. 8. The supply system (20) according to claim 7, characterized in that a clutch (21) is arranged between the mechanically driven delivery pump (16) and the driven device (18), by means of which clutch the mechanically driven delivery pump (16) can be decoupled from the driven device (18).
  9. 9. Supply system (20) according to claim 8, characterized in that the clutch (21) is controlled and/or can be actuated by means of an actuator in dependence on the pressure prevailing in the supply system (20).
  10. 10. The supply system (10) of claim 7, wherein the mechanically driven transfer pump (16) is continuously coupled with the driven device (18).

Description

Method for operating a supply system and supply system Technical Field The invention relates to a method for operating a supply system, in which components of the drive system are supplied with lubricant and/or coolant, wherein an electrically driven transfer pump is operated during normal operation of the drive system and, as a result, the lubricant and/or coolant is transferred to the components in the supply system by the electrically driven transfer pump, and wherein, during a special operation in which the electrically driven transfer pump is switched off during operation of the drive system, at least some of the components are supplied with lubricant and/or coolant in the supply system only by the mechanically driven transfer pump. The invention further relates to a supply system, in which components of the drive system can be supplied with lubricant and/or coolant. Background In drive trains, the components are typically supplied with lubricant and/or coolant, respectively, in a supply system in order to achieve lubrication and/or cooling in the individual components and/or to operate the individual components by supply. In most cases, the supply system is designed here as a hydraulic system, in which the supply is performed by means of a hydraulic fluid, which is usually oil. In the operation of the respective drive system, a sufficient supply of the individual components is ensured at all times. The supply systems increasingly have electrically driven delivery pumps, but in some cases mechanically driven delivery pumps are provided in addition to the electrically driven delivery pumps, in order to still be able to supply power to at least some of the components in the supply system in the event of a fault or the like. EP 2 855,928 B1 discloses a supply system for a drive system in the form of a transmission of a wind power installation. In this case, in the supply system, the components in the form of bearings and gears can be supplied with lubricant, wherein for the supply a mechanically driven delivery pump is provided in addition to the electrically driven delivery pump. In the context of the method, the supply system of EP 2 855,928 B1 can be operated in such a way that during normal operation of the transmission, the electrically driven transfer pump is supplied with electrical energy and thus lubricant is transferred to the bearings and the gear via the two transfer pumps. Furthermore, in special operation (in which the operation of the electrically driven transfer pump is stopped during active operation of the transmission due to a lack of electrical energy supply), only a part of the components, i.e. the bearings of the transmission, are supplied with lubricant only by the mechanically driven transfer pump. Disclosure of Invention Starting from the prior art described above, the object of the present invention is to keep losses in the supply system of the drive system as small as possible on the one hand and to avoid damage to components of the drive system that occurs as a result of a lack of supply on the other hand. From a technical point of view of the method, this object is achieved by the preamble of claim 1, which is assigned to the characterizing part thereof. Furthermore, from a device technical point of view, the solution is based on the preamble of the parallel claim 7 in combination with its features. The following dependent claims reflect advantageous refinements of the invention, respectively. According to claim 1 in parallel, in a method for operating a supply system, components of the drive system are supplied with lubricant and/or coolant. The electrically driven transfer pump is operated during normal operation of the drive system, and thus the lubricant and/or coolant is transferred to the components in the supply system by the electrically driven transfer pump. During special operation, in which the electrically driven transfer pump is switched off when the drive system is in operation, lubricant and/or coolant is supplied to at least some of the components in the supply system only by the mechanically driven transfer pump. During normal operation of the drive system, the supply system is therefore operated such that a supply of the components by means of an electrically driven transfer pump is performed, which is supplied with electrical energy for this purpose in the supply system and thereby transfers lubricant and/or coolant to the components. A special operation occurs in the operation of the supply system when the electrically driven transfer pump is not in operation during the active operation of the drive system, so that the electrically driven transfer pump also does not transfer lubricant and/or coolant. Alternatively, during special operation, only the mechanically driven delivery pump is operated, which thereby delivers lubricant and/or coolant, and the supply of the delivered lubricant and/or coolant to at least part of the components is performed. Thus, acc