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US 4,382,496 AGranted
Torque converter with lockup clutch unit
AssigneeNissan Motor Co., Ltd.
InventorsTakahiro Yamamori, Kazuyoshi Iwanaga, Kunio Ohtsuka
Life of this patent
Estimating the term…
Abstract
A converter fluid supply passage is situated between a transmission input shaft and a pilot sleeve shaft and a converter fluid return passage is defined between the transmission input shaft and the stationary sleeve shaft extension so that the annular space between the pump drive shaft and the transmission input shaft may be used only as a lockup control passage.
Claims11
A hydrokinetic torque converter assembly of the lockup clutch unit-equipped type comprising:
- a rotatable converter cover, an impeller drivingly connected to said converter cover, a turbine and a stator operatively associated with said impeller to define a converter working circuit, a pump drive shaft drivingly connected to said converter cover, a stationary sleeve shaft extension carrying thereon said stator and concentrically disposed about said pump drive shaft, an aperture free hollow transmission input shaft drivingly connected to said turbine and concentrically disposed between said pump drive shaft and said stationary sleeve shaft extension, a pilot sleeve shaft integrally connected to said converter cover and rotatably carried by said stationary sleeve shaft extension, said pilot sleeve shaft being concentrically disposed about said stationary sleeve shaft extension, a lockup clutch unit including a clutch piston which is cooperative with said converter cover to define therebetween a clutch chamber, said clutch piston being drivingly connected to said turbine and movable toward and away from said converter cover to engage and disengage said converter cover in response to the fluid pressure in said clutch chamber;
- means defining a lockup control fluid passage between said pump drive shaft and said transmission input shaft, said lockup control fluid passage communicating with said clutch chamber;
- means defining a first converter fluid passage located between said transmission input shaft and said pilot sleeve, said first converter fluid passage communicating with said converter working circuit;
- and
- means defining a second converter fluid passage between said transmission input shaft and said stationary sleeve shaft extension, said second converter fluid passage communicating with said converter working circuit.
2 more elements
A hydrokinetic torque converter assembly of the lockup clutch unit-equipped type including a rotatable converter cover, comprising:
- an impeller cover drivingly connected to said converter cover;
- a turbine and a stator operatively associated with said impeller to define a converter working circuit;
- a pump drive shaft drivingly connected to said converter cover;
- a stationary sleeve shaft extension carrying thereon said stator and concentrically disposed about said pump drive shaft;
- an aperture free hollow transmission input shaft drivingly connected to said turbine and concentrically disposed between said pump drive shaft and said stationary sleeve shaft extension;
- a pilot sleeve shaft integrally connected to said converter cover and rotatably carried by said stationary sleeve shaft extension, said pilot sleeve shaft being concentrically disposed about said stationary sleeve shaft extension;
- a lockup clutch unit including a clutch piston which is cooperative with said converter cover to define therebetween a clutch chamber, said clutch piston being drivingly connected to said turbine and movable toward and away from said converter cover to engage and disengage said converter cover in response to the fluid pressure in said clutch chamber;
- said stationary sleeve shaft extension and said hollow transmission input shaft defining therebetween a first annular passage;
- said hollow transmission input shaft and said dump drive shaft defining therebetween a second annular passage which fluidly communicates with said clutch chamber;
- means defining a first elongate groove in the inner surface of said stationary sleeve shaft extension;
- means defining a second elongate groove in the inner surface of said stationary sleeve shaft extension;
- a bush disposed in said stationary sleeve shaft extension which closes said first and second elongate grooves to form first and second chambers, said first chamber defining part of a first passage structure which communicates with the interior of torque converter;
- and
- means defining a notch in said bush for communicating said second chamber with said first annular passage, said second chamber and said first annular passage defining part of a second passage structure which communicates with the interior of said torque converter.
11 more elements
Dependencies are inferred from the claim text.