Double clutching what is

We have talked here about how different types of manual transmissions work, including the synchromesh which uses synchronisers, and it provides a better understanding of the processes double clutching affects. So now you know what it is, you can…not bother with it. There are a few instances where it could be used, but all involve racing and not everyday road use - such as powering into a corner where you need to change down quickly, and when overtaking and need to quickly accelerate by shifting down into a lower gear.

But there's no harm in knowing what it is and how to do it. Found this post useful? Why not share it with your network:. Each one of these systems, the engine output shaft, the clutch, and the transmission output shaft, can all rotate independently.

The purpose of a clutch is to act as a buffer between the engine and transmission, so when the speeds are mismatched, the clutch is utilized to sync the two systems together. In lower gears, the engine will spin fast relative to the transmission output shaft. In high gears, the transmission output shaft will spin quickly relative to the engine.

Maintenance Tips. Car Review. Car Comparison. Industry knowledge. By Tsukasa Azuma. Last updated Nov 20, What Is Double Clutching? Dual clutching requires using the clutch two times.

How To Double Clutch? The Functions Of The Components There are several parts of the engine and transmission that take part in the dual-clutching process. Their functions are: Input Shaft — the place that supplies the power of the engine. Clutch Gear — one end of the gear is connected to the input shaft.

Lay Shaft — transfers power through the fixed gear to the output shaft. The gears on the shaft rotate whenever the shaft spins because of the way they are attached to each other. Output Shaft — the place that transmits the engine power to the wheels. Press in the clutch pedal once more. Place the shifter into third gear. Release the clutch pedal. Got it? Nearly all modern manual transmission passenger vehicles have synchronizers, which makes the entire process described above unnecessary.

Historically, however, heavy-duty freight truck transmissions do not have synchronizers. Knowing that your manual transmission vehicle uses synchronizers, you may think there is no point in understanding how to double clutch.

There are still specific scenarios, however, where it can be useful. This is because the transmission output speed is highly mismatched versus the engine and clutch speed. For a more visual explanation of how this all works, check out the video below.