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Double clutching (also called double declutching) is a method of shifting gears used primarily for vehicles with an unsynchronized manual transmission, such as commercial trucks and specialty vehicles. Double clutching is not necessary in a vehicle that has a synchronized manual transmission. With this method, instead of pushing the clutch in once and shifting directly to another gear, the driver first engages the transmission in neutral before shifting to the next gear. The clutch is pressed and released with each change.〔(【引用サイトリンク】title=Double-Clutch )〕 ==Technique== The double clutching technique involves the following steps: *The throttle (accelerator) is released, the clutch pedal is pressed, and the gearbox is shifted into neutral. *The clutch pedal is then released, the driver matches the engine RPM to the gear RPM either using the throttle (accelerator) (when changing to a lower gear) or waiting for RPM to decrease (when changing to a higher gear) until they are at a level suitable for shifting into the next gear. *At the moment when the revs between engine and gear are closely matched, the driver then instantly presses the clutch again to shift into the next gear. The result should be a very smooth gear change. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Double clutch (technique)」の詳細全文を読む スポンサード リンク
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