HYDRAULIC CONTINUOUSLY VARIABLE TRANSMISSION CONTROL DEVICE IN MOVABLE AGRICULTURAL MACHINE

摘要

PROBLEM TO BE SOLVED: To provide a movable agricultural machine having a hydraulic continuously variable transmission on a transmission of a transmission system of a working machine in which abnormal load is immediately detected, and adverse effect on the works and a machine body are prevented even when abnormal load occurs in the working machine. SOLUTION: A relief detection means to detect that a relief valve 52 of a hydraulic circuit of a hydraulic continuously variable transmission 22 is opened is provided. A swash plate of the hydraulic continuously variable transmission 22 is returned to the neutral position by the detection of the relief detection means. A swash plate angle detection means and a rotation detection means 31 of the hydraulic continuously variable transmission 22 are provided. The relief detection means regards that the relief valve 52 is opened when the angle of the swash plate is equal to or greater than a predetermined value, and the number of rotation thereof is equal to or less than a predetermined value. COPYRIGHT: (C)2005,JPO&NCIPI