ELI5: How Dual-Clutch Transmissions and Continuously Variable Transmissions use clutches but do not stall.

| Category: Explain

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ChefRoquefort: My truck has a standard transmission and does not stall unless i use the clutch improperly. A traditional automatic transmission has clutches in it too, multiple clutches too. They all work due to having a system to operate the clutches at the correct times, either a pedal with a human operator, or an electro mechanical or mechanical system.

Budderped: Dual clutch transmissions are basically a sequential manual transmission controlled by computers and therefore automated and programmed not to stall. If you are able to override the computer, then yes, it can be stalled.

CVTs are like automatics and use a torque converter and will not stall as if it were an automatic. However it is not strictly true that CVTs cannot be stalled as nothing prohibits you from installing a foot-operated clutch to the CVT(same with automatics), in that case, it can still be stalled

krystar78: standard manual transmissions leave the operation of the clutch to the driver. dual clutch tranmissions have a computer thats controls the clutch thru vacuum and hydraulic systems. the computer doesn’t make the mistake of misengaging the clutch .

moriz0: some CVTs and DCTs use electronically controlled clutches (or similar tech), which automatically engage the clutch when the engine revs above a certain limit. these cars are notable, because they do not inch forward when you release the brakes while the engine is idling in drive gear.

some CVTs and DCTs use torque converters, similar to how traditional automatic transmission vehicles.

in both cases, the system actively prevents the engine from stalling.

Filed Under: Explain

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