multiclutch

Multiclutch refers to a type of automatic transmission that uses multiple clutches instead of a torque converter to engage different gear sets. Unlike traditional automatic transmissions that rely on hydraulic fluid to transfer power, multiclutch transmissions use dry or wet clutches, similar to those found in manual transmissions. This design allows for very rapid and smooth gear changes, as the next gear can be pre-selected and engaged almost instantaneously.

There are two primary types of multiclutch transmissions: dual-clutch transmissions (DCTs) and sequential manual transmissions (SMTs). DCTs are the most common, featuring two separate clutches, one for odd-numbered gears and another for even-numbered gears. This arrangement allows for seamless power transfer, as one clutch can disengage while the other engages, effectively pre-shifting the next gear. SMTs, while also using clutches, typically have a single clutch operated automatically and a sequential shift mechanism, prioritizing speed of engagement over smoothness in some applications.

Multiclutch transmissions offer advantages such as improved fuel efficiency compared to traditional automatics due to reduced power loss. They also provide a more direct and engaging driving experience, often favored in performance vehicles. However, they can sometimes be more complex and expensive to manufacture and repair. The specific implementation and programming of the clutch engagement and gear selection significantly influence the overall performance and driving feel of a multiclutch system.