Invention Publication
- Patent Title: APPARATUS FOR SUPPLYING FLUID TO AN ELECTRIC DRIVE TRAIN
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Application No.: US18025848Application Date: 2021-08-24
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Publication No.: US20230331076A1Publication Date: 2023-10-19
- Inventor: Philipp BEIERER , Thomas REITER , Tim SCHNÄDELBACH , Christian KOHRS
- Applicant: MAN Truck & Bus SE
- Applicant Address: DE München
- Assignee: MAN Truck & Bus SE
- Current Assignee: MAN Truck & Bus SE
- Current Assignee Address: DE München
- Priority: DE 2020123590.9 2020.09.10
- International Application: PCT/EP2021/073403 2021.08.24
- Date entered country: 2023-03-10
- Main IPC: B60K11/02
- IPC: B60K11/02 ; F16N7/40 ; B60K1/00

Abstract:
The present invention relates to a device (100) for supplying fluid to an electric drive train for a motor vehicle, preferably for cooling and lubricating a transmission (50) and/or for supplying oil to an electric motor of the electric drive train. The device (100) comprises a main pump (10) configured as a hydraulic fixed displacement pump for delivering fluid from a fluid reservoir (40) to the electric drive train. The apparatus (100) further comprises at least one auxiliary pump (20) configured as a hydraulic fixed displacement pump. The main pump (10) and the auxiliary pump (20) are mechanically driven by the transmission (50) of the electric drive train in such a way that a fixed transmission ratio exists between a pumping rotation speed of the main pump (10) and a pumping rotation speed of the auxiliary pump (20), wherein the auxiliary pump (20) can be selectively connected by means of a controllable actuating device (30) for supplying fluid to the electric drive train.
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