Title: AUTOMATIC HYDROMECHANICAL TRANSMISSIONS OF MOTOR VEHICLES IN THE USSR
Abstract: Current designs of Soviet hydromechanical transmissions (HMTs) for buses, trucks and passenger cars are briefly described. Not all the HMTs feature automatic gear changes, but every one of them incorporates a torque converter and uses friction elements and, in some cases, one–way clutches, to effect the gear changes. The HMTs of buses incorporate two–, or three–speed nonplanetary gear trains. Three– and five–speed nonplanetary gear trains are used in the HMTs of BelAZ quarry dump trucks and three– and four–speed planetary gear trains are used in the HMTs of heavy duty MAZ all–terrain wheeled tractors. The HMTs of the passenger cars ZIL and GAZ have three–speed planetary gear trains. Two HMTs with three–speed gear trains for passenger cars with engine displacements of 1.2–2.01 have been designed: a planetary type, made in cooperation with Czechoslovakia, and a nonplanetary type, made by the Izhevsk car plant. Both have been treated for significant increase in efficiency.
Publication Year: 2014
Publication Date: 2014-08-05
Language: en
Type: article
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