Study on Matching Strategies and Simulation of Hydro-mechanical Continuously Variable Transmission System of Tractor

In this paper, the engine output torque model and fuel consumption model are established based on engine test results. The engine rotary speed feature denotes the relationship between the engine rotary speed and the throttle opening when engine works in the optimal modes of economic and power operating. On the basis of the above work, the matching strategies of hydro-mechanical continuously variable transmission (HMCVT) system are put forward. According to the different fieldwork of tractor, the matching strategies of HMCVT system are studied by simulation method. The research provides theoretical foundation for design and control method determination of HMCVT system.