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Title: Hydromechanical transmission with hydrodynamic drive

Abstract

This transmission has a first planetary gear assembly having first input means connected to an input shaft, first output means, and first reaction means, and a second planetary gear assembly having second input means connected to the first input means, second output means, and second reaction means connected directly to the first reaction means by a reaction shaft. First clutch means, when engaged, connect the first output means to an output shaft in a high driving range. A hydrodynamic drive is used; for example, a torque converter, which may or may not have a stationary case, has a pump connected to the second output means, a stator grounded by an overrunning clutch to the case, and a turbine connected to an output member, and may be used in a starting phase. Alternatively, a fluid coupling or other type of hydrodynamic drive may be used. Second clutch means, when engaged, for connecting the output member to the output shaft in a low driving range. A variable-displacement hydraulic unit is mechanically connected to the input shaft, and a fixed-displacement hydraulic unit is mechanically connected to the reaction shaft. The hydraulic units are hydraulically connected together so that when one operates as amore » pump the other acts as a motor, and vice versa. Both clutch means are connected to the output shaft through a forward-reverse shift arrangement. It is possible to lock out the torque converter after the starting phase is over.« less

Inventors:
 [1];  [2]
  1. (LATE OF San Francisco, CA)
  2. (San Diego, CA)
Issue Date:
Research Org.:
Orshansky Transmission Corp., San Diego, CA (USA)
OSTI Identifier:
863255
Patent Number(s):
4134310
Assignee:
Orshansky Transmission Corporation (New York, NY) OSTI
DOE Contract Number:  
EY-76-C-03-1165
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
hydromechanical; transmission; hydrodynamic; drive; planetary; gear; assembly; input; means; connected; shaft; output; reaction; directly; clutch; engaged; connect; driving; range; example; torque; converter; stationary; pump; stator; grounded; overrunning; turbine; starting; phase; alternatively; fluid; coupling; type; connecting; variable-displacement; hydraulic; unit; mechanically; fixed-displacement; units; hydraulically; operates; motor; vice; versa; forward-reverse; shift; arrangement; lock; output means; hydraulic units; connected directly; mechanically connected; gear assembly; output shaft; input shaft; planetary gear; means connected; vice versa; input means; hydromechanical transmission; torque converter; hydraulic unit; mechanically connect; /475/

Citation Formats

Orshansky, Jr., deceased, Elias, and Weseloh, William E. Hydromechanical transmission with hydrodynamic drive. United States: N. p., 1979. Web.
Orshansky, Jr., deceased, Elias, & Weseloh, William E. Hydromechanical transmission with hydrodynamic drive. United States.
Orshansky, Jr., deceased, Elias, and Weseloh, William E. Mon . "Hydromechanical transmission with hydrodynamic drive". United States. https://www.osti.gov/servlets/purl/863255.
@article{osti_863255,
title = {Hydromechanical transmission with hydrodynamic drive},
author = {Orshansky, Jr., deceased, Elias and Weseloh, William E.},
abstractNote = {This transmission has a first planetary gear assembly having first input means connected to an input shaft, first output means, and first reaction means, and a second planetary gear assembly having second input means connected to the first input means, second output means, and second reaction means connected directly to the first reaction means by a reaction shaft. First clutch means, when engaged, connect the first output means to an output shaft in a high driving range. A hydrodynamic drive is used; for example, a torque converter, which may or may not have a stationary case, has a pump connected to the second output means, a stator grounded by an overrunning clutch to the case, and a turbine connected to an output member, and may be used in a starting phase. Alternatively, a fluid coupling or other type of hydrodynamic drive may be used. Second clutch means, when engaged, for connecting the output member to the output shaft in a low driving range. A variable-displacement hydraulic unit is mechanically connected to the input shaft, and a fixed-displacement hydraulic unit is mechanically connected to the reaction shaft. The hydraulic units are hydraulically connected together so that when one operates as a pump the other acts as a motor, and vice versa. Both clutch means are connected to the output shaft through a forward-reverse shift arrangement. It is possible to lock out the torque converter after the starting phase is over.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1979},
month = {1}
}

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