Transmission and control mechanism for hydrostatic-mechanical po

Details Transmission and control mechanism for hydrostatic-mechanical po Transmission and control mechanism for hydrostatic-mechanical po

Filed on

1992-07-28

Date issued

1995-04-18

Examiner

Look, Edward K.

Patent Class

Power plants

SubClass

Pressure fluid source and motor

SubSubClass

Condition responsive control of or by input to input pump...

Other Related Categories

60437, 60449, 475 76, 475 80, F16D 3102

Type

Patent

Status

active

Patent number

054067936

Description

ABSTRACT:
A transmission and control mechanism for a hydrostatic-mechanical power transmission system, provided with a mechanical transmission driven through an input shaft connected to a engine, a hydrostatic transmission connected to the input shaft, and a differential unit for connecting an output shaft to the mechanical and hydrostatic transmissions. The hydrostatic transmission includes a swashplate type pump and motor, with at least one of the swashplates being variable in angle. There is an engine revolution speed sensor, a target motor speed ratio setting device for setting a target motor speed ratio based on whether the engine speed is above, below or within a predetermined speed range, and a swashplate angle controller for controlling the swashplates according to the target motor speed ratio.

REFERENCES:
patent: 3884095 (1975-05-01), Miyao et al.
patent: 3943715 (1976-03-01), Mivao et al.
patent: 4019404 (1977-04-01), Schauer
patent: 4246806 (1981-03-01), Mizuno et al.
patent: 4253347 (1981-01-01), Reynolds et al.
patent: 4895049 (1990-01-01), Kita et al.
patent: 4983149 (1991-01-01), Kita

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