Research on HMCVT Parameter Design Optimization Based on the Service Characteristics of Agricultural Machinery in the Whole Life Cycle

The HMCVT (Hydro-mechanical Continuously Variable Transmission) can realize continuously variable speed in a large range and transmit high power through diving, thus, it is widely applied agricultural machineries, such as tractors. engineering technology requirements of precision agriculture intelligent have put forward higher requests for the research development HMCVT. In order to further improve performance design stage match service characteristics tractors whole life cycle, this paper proposes new optimization method which mainly consists 5 steps. proposed takes regular continuous transmission ratio variation, matching working cycle efficiency maximization comprehensive objectives. improved genetic algorithm (I-GA) applied. characteristic model combines hydraulic system, has been verified, theoretical calculation based on engaging method. By analyzing statistical data tractor operating frequency used determine weight each hydro-mechanical dividing (i.e., HM stage) time. process, integrated with displacement so evaluation maximum tractor. Research results show that significantly, mean error between regulating expected value 1.04% or so. by 19.93%. offers valuable reference getting law improvement