Hydro-mechanical transmission and continuously variable transmission ☐Main content 1.The working principle of hydraulic coupler and hydrodynamictorque converter 2.The structure and principle of hydro- mechanical transmission 3.The control mechanism of automatic transmission 4.Continuous variable transmissionHydro-mechanical transmission and continuously variable transmission Main content 1. The working principle of hydraulic coupler and hydrodynamic torque converter 2. The structure and principle of hydro￾mechanical transmission 3. The control mechanism of automatic transmission 4. Continuous variable transmission