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US 2001/0041640 A1Published application
Infinite speed ratio continuously variable transmission
AssigneeNissan Motor Co., Ltd.
InventorsHiromasa Sakai, Toshikazu Oshidari
Life of this patent
Estimating the term…
Abstract
A three-way clutch unit (9) comprising a forward clutch (91), second clutch (92) and forward one way clutch (93) which sets a power recirculation mode, a high clutch (10) which sets a direct mode, and a mode change-over valve (175) which supplies an oil pressure to one of the high clutch (10) and second clutch (92), are provided.
Claims12
An infinite speed ratio continuously variable transmission, comprising:
- a continuously variable transmission which can vary speed ratio continuously,
- a fixed speed ratio transmission,
- a unit input shaft which connects to input side of the continuously variable transmission and the fixed speed ratio transmission,
- a unit output shaft which connects to output side of the continuously variable transmission and the fixed speed ratio transmission via a planetary gear set,
- a first clutch device interposed between the fixed speed ratio transmission and the planetary gear set, which sets a power recirculation mode,
- a second clutch device interposed between the continuously variable transmission and the unit output shaft, which sets a direct mode, and
- a clutch control unit which controls the power recirculation mode and the direct mode by selectively engaging the clutches of the first and second clutch devices according to the running state,
- wherein
- at least one of the first clutch device and the second clutch device provides a one way clutch, a first clutch interposed in series to the one way clutch and a second clutch which is provided in parallel to the one way clutch, and
- the clutch control unit only permits engaging one of the first clutch device and the second clutch device when both the first clutch device and the second clutch device can transmit torque in both directions.
7 more elements
An infinite speed ratio continuously variable transmission, comprising:
- a continuously variable transmission which can vary speed ratio continuously,
- a fixed speed ratio transmission,
- a unit input shaft which connects to input side of the continuously variable transmission and the fixed speed ratio transmission,
- a unit output shaft which connects to output side of the continuously variable transmission and the fixed speed ratio transmission via a planetary gear set,
- a first clutch device interposed between the fixed speed ratio transmission and the planetary gear set, which sets a power recirculation mode,
- a second clutch device interposed between the continuously variable transmission and the unit output shaft, which sets a direct mode,
- at least one of the first clutch device and the second clutch device can select a state from a engaging state which transmit torque in at least one direction, a engaging state which transmit torque in both direction, and a release state which does not transmit torque, and
- a clutch control unit which controls the power recirculation mode and the direct mode by selectively engaging the clutches of the first and second clutch devices according to the running state, wherein
- the clutch control unit only permits engaging one of the first clutch device and the second clutch device when both the first clutch device and the second clutch device can transmit torque in both directions.
6 more elements
Dependencies are inferred from the claim text.