How Durable is the BYD 6-Speed Wet Dual Clutch Transmission?
1 Answers
BYD's 6-speed wet dual clutch transmission is reliable and durable. Here is an extended introduction about BYD's dual clutch transmissions: 1. Dry dual clutch: The 6-speed dry dual clutch can withstand a maximum torque of 250 Nm. When paired with a 1.5T engine, this dry dual clutch was found to be relatively unstable. Subsequently, BYD matched this 6DT25 with a naturally aspirated 1.5L engine that has much lower torque, and eventually discontinued the 6DT25 dry dual clutch. Although this dry clutch was not entirely successful, the experience gained was invaluable, providing crucial foundational data for BYD to develop better products in the future. 2. Wet dual clutch: The 6-speed wet dual clutch can handle a maximum torque of 350 Nm and is paired with a 2.0T engine, making it more stable. BYD has been cautious with power matching, opting to use this 6DT35 wet dual clutch with 1.5T engines, such as in the Song series and 1.5T Qin series. With the 1.5T engine's maximum torque of 240 Nm and the 6DT35's capacity of 350 Nm, there is a torque margin of over 100 Nm. Additionally, since both the ECU and TCU are produced in-house by BYD, the matching is excellent. The transmission performs well in various scenarios: strong starting creep, smooth shifting, delayed upshifting on slopes, and automatic gear changes based on speed when coasting or going downhill without throttle input. BYD has continuously upgraded and optimized this transmission, such as switching to Schaeffler-made clutch plates instead of in-house production.
