Multi-range hydromechanical transmission for vehicles

F - Mech Eng,Light,Heat,Weapons – 16 – H

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F16H 47/04 (2006.01)

Patent

CA 2294495

A hydromechanical transmission (2) receives split power inputs from a vehicle engine (6), one split input driving a hydrostatic power unit (4) and the other split input driving a mechanical power unit (8). The infinitely variable hydrostatic power output (21) is combined in the mechanical power unit (8) with multiple ratios of its split input power to achieve infinitely variable ratios of hydromechanical output power (10) for smoothly propelling a vehicle from rest through multiple transmission ranges to maximum speed, with synchronous shifting between ranges.

La présente invention concerne une transmission hydromécanique (2) qui reçoit une puissance d'entrée fractionnée provenant d'un moteur de véhicule (6), une fraction animant une unité de puissance hydrostatique (4) et l'autre fraction animant une unité de puissance mécanique (8). La sortie de puissance hydrostatique (21), infiniment variable, est combinée, dans l'unité de puissance mécanique (8), avec des rapports multiples de sa puissance d'entrée fractionnée; ceci permet d'obtenir des rapports de puissance de sortie (10) hydromécanique infiniment variables, afin d'amener, sans à-coups, un véhicule de sa position de repos à sa vitesse maximale à l'aide de gammes de transmission multiples, avec passage de vitesse synchronisé entre les gammes.

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