Senniger, Powers, Leavitt & Roedel
Transmission and control mechanism for hydrostatic-mechanical power transmission system
 A transmission and control mechanism for a hydrostatic-mechanical power transmission system, provided with a mechanical transmission driven through an input shaft connected to a engine, a hydrostatic transmission connected to the input shaft, and a differential unit for connecting an output shaft to the mechanical and hydrostatic transmissions. The hydrostatic transmission includes a swashplate type pump and motor, with at least one of the swashplates being variable in angle. There is an engine revolution speed sensor, a target motor speed ratio setting device for setting a target motor speed ratio based on whether the engine speed is above, below or within a predetermined speed range, and a swashplate angle controller for controlling the swashplates according to the target motor speed ratio. 
Komatsu Ltd.
F B B F F B F
F16H B60W B60W F16H F16H B60W F16H
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Tsutomu Ryoichi Hideki
Ishino Maruyama Yamada