Cao Qingmei

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.

The Design of Communication Nodes in the Tractor Control Network Based on ISO11783 Protocol

This thesis introduces the structure of tractor electronic control network and the basic characteristics of ISO 11783 communication protocol in the serial communication network of agricultural vehicles, and presents the design scheme, which is based on C8051F040 chip, for software and hardware of ECU communication nodes in the tractor electronic control network.