Studies on Feedback Power and Power Transmission Systems of Closed-loop for Rotary-Tilling Tractors (Part 3)

Power Transmission Efficiency of A Closed-loop System on Power Tillers

Abstract

Theoretical analyses and field experiments of a rotary power tiller were carried out in order to study the power transmission characteristics of the tractor-rotary tilling system.
In this report, the feedback power of a power tiller caused by rotary tilling process is analyzed with block diagrams in order to obtain the theoretical equations of the power transmission efficiency in a closed-loop system. When a power tiller is tilling, a part of the rotary axle power transmitted from the engine returns back to the driving wheels of the power tiller, which is named “return power”. Then, a part of the return power is consumed by the traveling resistances of the machine. The surplus of the power is transmitted as feedback power into the power transmission system of the machine. Some equations to calculate the power transmission efficiency of the closed-loop system are obtained and discussed with actual exampes. The results of the field experiments will be reported in the next report.