Continuously variable transmission for use on vehicle

Details Continuously variable transmission for use on vehicle Continuously variable transmission for use on vehicle

1998-05-22

1999-10-19

Wright, Dirk

Planetary gear transmission systems or components

Fluid drive or control of planetary gearing

Pump and motor in series with planetary gearing

475 72, 475 73, 74606R, 180307, F16H 3904

Patent

active

059679271

ABSTRACT:
A continuously variable transmission for use on vehicle, which is provided in an FR drive power transmission path to change the rotational drive power of the engine in continuous speed variation, comprises a variable displacement type hydraulic swash plate pump (P) and a hydraulic swash plate motor (M), which are connected with each other through a hydraulic closed circuit (51). The hydraulic pump (P), which is driven by the engine, delivers oil to the hydraulic motor (M), and the hydraulic motor (M), which is driven by the oil being received, transmits the rotational drive power to the rear wheels. The hydraulic pump (P), the hydraulic closed circuit (51) and the hydraulic motor (M) are arranged in this order in series in a rearward direction from the output shaft of the engine in the vehicle, and hydraulic servo mechanisms (45) and (65) that swivel the swash plates of the hydraulic pump (P) and the hydraulic motor (M) and hydraulic control valves (V) that perform various hydraulic control operations are placed under the hydraulic continuously variable transmission mechanism of the transmission.

REFERENCES:
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patent: 5785623 (1998-07-01), Iino et al.
patent: 5803856 (1998-09-01), Iino et al.
patent: 5807199 (1998-09-01), Keller
English language Abstract of JP 7-280063.
English language Abstract of JP 8-74965.

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