Hydrostatic Power-Splitting Transmissions for Wheeled Tractors – Application and Observed Performance

This paper describes two particular hydrostatic power-splitting transmission packages (an “input-coupled” planetary and an “output-coupled” hydraulic differential). It discusses their construction, installation in experimental tractors, and resulting performance of each. Peak performance of both was very close, but the “output-coupled” hydraulic differential transmission provided higher operating efficiency over a broader speed range.