Change Driven Dual Clutch

For many years the use of the automatic transmission was reserved for models equipped with powerful engines. The problem was to incorporate this type of transmission in smaller lay in the mechanical torque. The blocks were then more powerful engine in its most gasoline of at least a minimum six-cylinder 2.5-liter engine offering good dose of torque, and it was solved one of the endemic problems of automatic updates; strength loss caused by the operation of the automatic transmission itself and, more specifically, the existence of the torque converter.

Change Driven Dual Clutch

To alleviate these problems, various options were tried, since the incorporation of a greater number of gears to try to get more power at each speed to the creation of other types of transmission allowed without the clutch, as was the case of CVT or driven change. The latter, the piloted switch, also called robotic hand, is based on the existence of a conventional manual transmission to which is coupled a series of elements that are automatically clutch functions. With this simple theory seeks to offer the comfort of an automatic with the efficiency of a manual gearbox. In practice most of these systems suffer from two basic problems: lack of comfort in the transitions from one gear to another and slow responses to requests from the driver.

One brand that has investigated to reach efficient and offer a real alternative to traditional automatic transmission torque converter at lower power vehicles has been Renault. In early nineties diamond Brand wanted to offer better ride comfort more utilitarian in your car, the Renault Twingo, and did so with a curious proposal to offer a seemingly traditional change but in which there was no pedal clutch. That version, called Easy, allowing the driver to change gears using the shifter in a traditional way but without pressing the clutch, for performing this action the pump pressure considering various parameters and movement of the shift lever. Despite the lateness of the proposal that technological innovation was premature and did not succeed, but also incorporated into the Renault Express.

But the most significant in terms of robot changes progress was achieved with the advent of automatic piloted dual clutch, a technology that is present in the change EDC Renault and getting, based on manual changes a capable performance racing traditional automatic transmissions.

In exchange EDC (Efficient Dual Clutch or Efficient Double Clutch) Renault has two clutches instead of just one as usual. A clutch is intended for the odd gears while another, which rotates concentrically with the former, goes to the even gears. To engage first gear the driver should press the lever or steering wheel selector shifter and managed the electronics will make first gear engagement is by engaging the clutch for odd gears system.

The particularity resides in that at the moment there is already a precoupling the second clutch, of the even gears, so that the second gear is coupled to its axis but does not transmit force to the wheels that the clutch in use is the odd gears. But when the driver decides to change to second gear the system engages the clutch for odd gears allowing the transition from one gear to the next is almost imperceptible.

Now the car is traveling with the second gear engaged with the corresponding shaft and the clutch allocated to the even gears while at the same time, the odd gears are pre-selected by the presence of the second clutch. Thus, when the driver decides to increase (3rd connection) or decreased (ratio 1st) gear, the exchange process is again almost immediately. The speed of reactions piloted dual clutch transmission not only play in comfort with traditional automatic transmissions, but also enables many times about getting even tighter consumption in manual changes thanks to its efficient operation.

Change Driven Dual Clutch