Why don't dual-clutch transmissions use torque converters?
1 Answers
When in use, the advantages of dual-clutch transmissions are not present, and their structural principle does not effectively mitigate gearshift jerking. Hydraulic Transmission Device: The hydraulic transmission device is a flexible connection between the engine and the transmission. The torque converter relies on oil within a sealed space to transmit power. The pump wheel of the torque converter is connected to the engine flywheel, while the turbine on the other end is connected to the gearbox, with a guide wheel in between. Due to its specially designed blades, the guide wheel has a torque-increasing effect. The torque converter can also lock at specific speeds. Its presence not only avoids impacts, vibrations, and torque changes caused by the rigid connection between the engine and the gearbox—acting as an adaptive transmission device—but also reduces the load on the engine from the gearbox. Dual-Clutch Transmission: The shifting logic of dual-clutch transmissions is simple: when one gear is engaged, the next gear is already pre-selected and ready. Once the dual-clutch begins shifting, it can switch directly. Therefore, due to its unique shifting principle, even adding a torque converter cannot fully resolve the jerky shifting issue of the transmission; at best, it can only slightly alleviate it.
