skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Automatic transmission having hydraulic and electronic control systems

Abstract

A shifting apparatus is described for a motor vehicle transmission which comprises: a shift actuator including shift shafts, cylinders, springs and select levers; the shift shafts effecting engagement and disengagement of transmission gears to accomplish shift ranges; each of the cylinders comprising one piston and two chambers defined by the piston, the piston being movable to three positions corresponding to the positions of the shift shaft and being actuated to one of the first or second position by applying working pressure to the chambers corresponding to each position; each of the springs urging the pistons to locate at a neutral position defined between the first or second positions; each of the select levers operatively connecting one of the shift shafts with a respective one of the pistons; an electronic control unit for gear shift operation; a hydraulic control unit comprising first, second and third solenoid valves, only the first solenoid valve actuated at a first shift range; the first and second solenoid valves actuated at a second shift range; only the second solenoid valve is actuated at a third shift range, and second and third solenoid valves are actuated at a fourth shift range; the third solenoid valve is actuatedmore » at a fifth shift range, no solenoid valve is actuated at a neutral shift range; and a reverse shift range is accomplished by actuating all the three solenoid valves.« less

Inventors:
;
Publication Date:
OSTI Identifier:
6297646
Patent Number(s):
US 4674345
Assignee:
Aisin Seik Kabushiki Kaisha, Aichi
Resource Type:
Patent
Resource Relation:
Patent File Date: Filed date 6 Dec 1984
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; MECHANICAL TRANSMISSIONS; CONTROL SYSTEMS; DESIGN; OPERATION; VEHICLES; ACTUATORS; CYLINDERS; ELECTRONIC EQUIPMENT; GEARS; HYDRAULIC CONTROL DEVICES; PISTONS; SHAFTS; SOLENOIDS; CONTROL EQUIPMENT; ELECTRIC COILS; ELECTRICAL EQUIPMENT; EQUIPMENT; MACHINE PARTS; 330602* - Vehicle Design Factors- Engine-Transmission Matching

Citation Formats

Furukawa, T, and Mori, M. Automatic transmission having hydraulic and electronic control systems. United States: N. p., 1987. Web.
Furukawa, T, & Mori, M. Automatic transmission having hydraulic and electronic control systems. United States.
Furukawa, T, and Mori, M. 1987. "Automatic transmission having hydraulic and electronic control systems". United States.
@article{osti_6297646,
title = {Automatic transmission having hydraulic and electronic control systems},
author = {Furukawa, T and Mori, M},
abstractNote = {A shifting apparatus is described for a motor vehicle transmission which comprises: a shift actuator including shift shafts, cylinders, springs and select levers; the shift shafts effecting engagement and disengagement of transmission gears to accomplish shift ranges; each of the cylinders comprising one piston and two chambers defined by the piston, the piston being movable to three positions corresponding to the positions of the shift shaft and being actuated to one of the first or second position by applying working pressure to the chambers corresponding to each position; each of the springs urging the pistons to locate at a neutral position defined between the first or second positions; each of the select levers operatively connecting one of the shift shafts with a respective one of the pistons; an electronic control unit for gear shift operation; a hydraulic control unit comprising first, second and third solenoid valves, only the first solenoid valve actuated at a first shift range; the first and second solenoid valves actuated at a second shift range; only the second solenoid valve is actuated at a third shift range, and second and third solenoid valves are actuated at a fourth shift range; the third solenoid valve is actuated at a fifth shift range, no solenoid valve is actuated at a neutral shift range; and a reverse shift range is accomplished by actuating all the three solenoid valves.},
doi = {},
url = {https://www.osti.gov/biblio/6297646}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {6}
}