Differences Between Dry and Wet Dual-Clutch Transmissions
2 Answers
Dry and wet dual-clutch transmissions differ in the following aspects: 1. Cooling Methods: Dry dual-clutch transmissions rely on air cooling for heat dissipation; Wet dual-clutch transmissions are immersed in oil, offering higher cooling efficiency. 2. Operational Differences: Dry clutches use manual transmission friction plates, featuring high mechanical transmission efficiency but more complex operation and higher failure rates; Wet clutches employ automatic transmission oil-immersed friction plates, with lower mechanical transmission efficiency but easier operation and lower failure rates. Dual-clutch transmissions are not suitable for frequent starts, prolonged low-speed driving, or stop-and-go traffic conditions, as they are prone to overheating, which can lead to malfunctions. Once the vehicle's computer issues a warning, it is essential to stop immediately to cool down the transmission.
I've driven cars equipped with dry dual-clutch transmissions, and the gear shifts feel exceptionally fast. They respond very agilely when cutting in during city driving or accelerating to overtake. However, during prolonged traffic jams, they noticeably heat up, and the jerky sensation kicks in, making the ride uncomfortable. In contrast, wet dual-clutch transmissions are immersed in oil for better cooling, making them suitable for high-speed or sporty driving, with smooth and seamless gear shifts. Overall, dry types are lighter, cost less, and save a bit on fuel, while wet types are heavier but more durable and reliable, suiting different driving scenarios. Nowadays, many urban compact cars come with dry types, whereas wet types are more common in mid-to-high-end vehicles. For long-distance driving, wet types offer a more worry-free and reassuring experience.
