eng Oriental Scientific Publishing Company Biosciences Biotechnology Research Asia 0973-1245 2015-04-28 12 1 619 625 5946 article Ildar Ilgizarovich Salakhov 1 Ildus Rifovich Mavleev 1 Ildar Rafisovich Shamsutdinov 1 Ruslan Ramilevich Basyrov 1 Voloshko Vladimir Vladimirovich 1 Naberezhnochelninsky Institute (branch) «Kazan Federal University», Russian Federation, 423812, Naberezhnye Chelny, pr.Syuyumbike, 10A. The author has carried out the analysis of dynamic-coupled automatic transmissions and regarded the prospects of their application and development. New design of continuously variable transmission based on differential hydra-mechanical gear train was developed and covered by RF patents No2298125 and No2347966. Principles of work performance for high-torque differential hydra-mechanical gear train based on interoperation equableness of moments opposing one another that are produced at the gear carrier owing to inner forces of differential stages as well as self-actuated pressure variation and hydraulic fluid consumption change when it comes through hydraulic pump and hydraulic actuator. https://www.biotech-asia.org/vol12no1/research-and-development-of-hydro-mechanical-differential-variator/ Hydra-mechanical gear train; Continuously variable Transmission; Differential hydra-mechanical variator; Mechanical diagram; High-torque differential hydra-mechanical variator