Nonstep speed change gear

Details Nonstep speed change gear Nonstep speed change gear

1989-10-30

1991-01-08

Wright, Dirk

Planetary gear transmission systems or components

Fluid drive or control of planetary gearing

Fluid pump and motor in one of plural paths to or from...

475 79, 475 78, 475 82, F16H 4704

Patent

active

049831496

ABSTRACT:
Disclosed is a nonstep speed change gear capable of selecting low speed mode and high speed mode by the low speed side clutch and high speed side clutch, comprising a differential mechanism having a low speed side mechanical transmission line and a high speed side mechanical transmission line formed in parallel, and a fluid transmission mechanism forming a pair of fluid transmission lines of which speed is variable by fluid pump/motor being installed on the way of these mechanical transmission lines, in which when the rotation speed difference of the both clutches becomes close to zero, the operation falls into intermediate lock-up mode so that the both clutches are connected together, and in this mode the displacement of the fluid pump/motor is controlled by the control mechanism so that the differential pressure of the circuits of the fluid transmission lines may be nearly zero.

REFERENCES:
patent: 3411381 (1968-11-01), Orshansky, Jr.
patent: 3969958 (1976-07-01), Miyao et al.
patent: 3979972 (1976-09-01), Sakai et al.
patent: 3988949 (1976-11-01), Weseloh et al.
patent: 4008628 (1977-02-01), Orshansky, Jr.
patent: 4313351 (1982-02-01), Hagin
patent: 4750381 (1988-06-01), Kita et al.

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