Now, equipped with a hydraulic automatic transmission (hereinafter referred to as the AT) is more and more big, the proportion of models compared with the manual transmission (hereinafter referred to as MT) models, the convenience is very prominent. Let's say the basic structure and working principle of the AT.
Automatic transmission, its core components: hydraulic torque converter, the planetary gear set, clutch/brake and its control mechanism (solenoid valve, oil), peripheral equipment is the shells of transmission shaft, etc. We are from power flow for the order, first started from the hydraulic torque converter.
The hydraulic torque converter is equivalent to the clutch on the MT, have the effect of dynamic connection and interrupt. Actually this is wrong. Directly connected to engine crankshaft is AT, don't like MT has a power switch: clutch
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