Power transmission device
AssigneeNiigata Converter Co., Ltd.
InventorsKazuhiko Nagase, Hideki Nakamura
Life of this patent
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Abstract
A power transmission device, in particular for a Diesel motor car is disclosed which comprises a hydraulic transmission and a mechanical transmission connected in series, the latter having low- and high-speed clutches, where in place of a direct drive clutch comprising a mechanical clutch that has hitherto been provided at the input side of the hydraulic transmission low- and high-speed clutches each comprising a mechanical clutch are provided in the mechanical transmission so as to serve as a direct drive clutch, remarkably shortening the time necessary for engaging the low- and high-speed clutch e.g. when the car is coasting with the low- and high-speed clutches disengaged.
Claims3
A power transmission device suitable for use in a rail car and so providing coasting operation and the same speed ratios and the same speed change steps in both forward and rearward powered operations, wherein the output of an engine is selectively transmitted to a transmission either indirectly through a torque converter or directly by bypassing said torque converter, the output being then transmitted to an output shaft through said transmission with the rotational speed being varied, characterized in that the input shaft connected to the output shaft of said engine can be selectively connected to a low-speed drive gear or a high-speed drive gear of said transmission through a low-speed clutch or a high-speed clutch, respectively, each comprising a mechanically engaging clutch, and in that a cylindrical shaft secured to said low-seed drive gear is arranged coaxially with said input shaft, said cylindrical shaft being connected to an output side of said torque converter through a free wheel, and in that an impeller wheel at the input side of said torque converter can be connected to said input shaft through a hydraulic friction clutch.
Dependencies are inferred from the claim text.