PROPULSION CONTROL MECHANISM FOR HST DRIVEN TRACTOR

摘要

PURPOSE:To eliminate the occurrence of an improper cultivating pitch due to a drop in the speed of a cultivator shaft for soil resistance acting on a rotary cultivator, and an increase in the travel speed of a cultivating rake over the driving speed of the cultivator for a propulsive force from the soil. CONSTITUTION:A brake is intermittently actuated to control a travel wheel, so as to keep a ratio of a value detected with a PTO shaft speed detecting sensor S1 to a value detected with an axle speed detecting sensor S2 identical to a preset value.