Hydraulic arrangement and electrically operable, multigear axle drive train
AssigneeSchaeffler Technologies AG & Co. KG
InventorsMarco Grethel, Carsten Mayer
Life of this patent
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Abstract
A hydraulic arrangement for an electrically operable, multigear axle drive train of a motor vehicle comprises a hydraulic circuit in which a hydraulic fluid is guided, a hydraulic pump arranged to apply pressure to the hydraulic fluid within the hydraulic circuit, a first hydraulic path arranged to connect a first clutch device to the hydraulic circuit, and a second hydraulic path arranged to connect a second clutch device to the hydraulic circuit. The first and second clutch devices are each arranged to actuate a gear selection device of the electrically operable axle drive train.
Claims20
A hydraulic arrangement for an electrically operable, multigear axle drive train of a motor vehicle, comprising:
- a hydraulic circuit in which a hydraulic fluid is guided,
- at hydraulic pump arranged to apply pressure to the hydraulic fluid within the hydraulic circuit,
- a first hydraulic path arranged to connect a first clutch device to the hydraulic circuit, and
- a second hydraulic path arranged to connect a second clutch device to the hydraulic circuit,
- wherein the first and second clutch devices are each arranged to actuate a gear selection device of the electrically operable axle drive train,
- wherein the first hydraulic path has a first non-return valve arranged to connect to the hydraulic circuit and a first switching valve connected downstream in the first hydraulic path,
- wherein a third hydraulic path engaging between the first switching valve and the first clutch device connects the first hydraulic path to the hydraulic circuit,
- wherein the second hydraulic path has a second non-return valve arranged to connect to the hydraulic circuit and a second switching valve connected downstream in the second hydraulic path,
- wherein a fourth hydraulic path engaging between the second switching valve and the second clutch device connects the second hydraulic path to the hydraulic circuit,
- wherein a passive bypass valve is arranged in at least one of the third hydraulic path or the fourth hydraulic path.
An electrically operable, multigear axle drive train of a motor vehicle, comprising
- an electric machine;
- a transmission coupled to the electric machine, the transmission including a gear selection device having a first clutch device and a second clutch device;
- and
- a hydraulic arrangement including:
- a hydraulic circuit in which a hydraulic fluid is guided, and
- a hydraulic pump arranged to apply pressure to the hydraulic fluid within the hydraulic circuit,
- wherein the first clutch device is connected to the hydraulic circuit via a first hydraulic path,
- wherein the second clutch device is connected to the hydraulic circuit via a second hydraulic path
- wherein the first hydraulic path has a first non-return valve arranged to connect to the hydraulic circuit and a first switching valve connected downstream in the first hydraulic path,
- wherein a third hydraulic path engaging between the first switching valve and the first clutch device connects the first hydraulic path to the hydraulic circuit,
- wherein the second hydraulic path has a second non-return valve arranged to connect to the hydraulic circuit and a second switching valve connected downstream in the second hydraulic path,
- wherein a fourth hydraulic path engaging between the second switching valve and the second clutch device connects the second hydraulic path to the hydraulic circuit,
- wherein a passive bypass valve is arranged in at least one of the third hydraulic path or the fourth hydraulic path.
Dependencies are inferred from the claim text.