Torque converter with forced oil circulation
AssigneeLuK Lamellen und Kupplungsbau Beteiligungs KG
InventorsStephan Maienschein, Mario Degler, Bruno Mueller, Kai Schenck
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Abstract
A three-channel torque converter in which an additional wall is mounted, thereby creating a third space which hydraulically connects the end of the plates that faces away from the turbine to a third channel. This third space ensures that an exchange flow of oil in a region of the hydrodynamic components (impeller, turbine, stator), of an optional damper, and of the lockup clutch is always restricted to flow across the plates of the lockup clutch. This provides high-performance cooling of the plates in the slip mode.
Claims24
A torque converter for motor vehicles comprising a three-channel oil system and a lockup clutch, wherein:
- the lockup clutch includes at least two axially movable plates, at least one plate being non-rotatably connected to an outer plate carrier and at least one other plate being non-rotatably connected to an inner plate carrier;
- a first channel of the oil system is connected to a first space;
- a second channel operates the lockup clutch by pressurizing a second space of the torque converter with oil, thereby pressing a piston against the plates;
- an additional wall spaced apart from the piston is mounted on a side of the piston that faces the first space, whereby a gap is formed between the piston and the additional wall, the additional wall abutting in a substantially oil-tight manner against the plate that faces the piston and at the same time providing hydraulic separation with respect to the first space and to the second space, thus forming a third space;
- the third space is connected in a substantially oil-tight manner to a third channel.
A torque converter for motor vehicles, comprising a three-channel oil system, a lockup clutch, and an anti-rotation means provided for a piston in a pressure chamber between a housing and the piston, wherein the anti-rotation means is shaped as a disk and preferably takes the form of a diaphragm spring, the anti-rotation means being riveted to the housing, and ribs of the piston engaging with radially outer slots of the anti-rotation means.
A torque converter for motor vehicles, comprising a three-channel oil system, a lockup clutch, and an anti-rotation means provided for a piston in a pressure chamber between a housing and the piston, wherein the anti-rotation means at the same time serves as a thrust washer (wear protection) between the housing and the transmission input shaft.
Dependencies are inferred from the claim text.