Chapter 16 Vehicle automatic transmission 日©大学 TONGII UNIVERSTTY Classification Ways to operate >Hydraulic controlled hydraulic actuation automatic transmission:An automatic transmission which manipulates the shift valves for shifting directly according hydraulic control signals which are converted from control parameters using various control valves. >Electronic controlled hydraulic actuation automatic transmission:An automatic transmission uses the electronic control unit (ECU)for controlling the hydraulic valves and hydraulic actions to shift according the measured parameters of various sensors and in accordance with the internal control strategies.Chapter 16 Vehicle automatic transmission Ways to operate Hydraulic controlled hydraulic actuation automatic transmission: An automatic transmission which manipulates the shift valves for shifting directly according hydraulic control signals which are converted from control parameters using various control valves. Electronic controlled hydraulic actuation automatic transmission: An automatic transmission uses the electronic control unit (ECU) for controlling the hydraulic valves and hydraulic actions to shift according the measured parameters of various sensors and in accordance with the internal control strategies. Classification