how double clutch transmissions works?
In: 5
Same as a regular transmission. Double clutch refers to shifting technique. You clutch in to come out of a gear, clutch out, roughly match engine speed for the next gear, then clutch in again to go into the next gear.
Transmission gears have something called “synchro mesh” disks or wheels. These are toothed wheels that spin against the drive gear. When the shift fork presses the synchro disk against the drive gear, the fork gear’s teeth engage with the synchro wheel which applies friction to the drive wheel, slowing its relative movement until the teeth can engage without grinding.
In passenger cars, the synchro wheels and fork gear are small enough that the momentum they carry between shifts can be overcome by friction from the next synchro gear.
It big trucks, synchro wheels and fork gears carry more momentum. So by double clutching in then out, matching engine speed, then clutching in again, you more closely match the fork gear’s speed with the next gear, which reduces wear and shift duration.
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