Renault Grand Scenic EDC Gearbox

The comfort of an automatic gearbox

The new EDC automatic gearbox represents a genuine break from traditional automatic gearboxes. It offers the same sturdiness and running costs as a manual gearbox providing you with comfort, responsiveness and also smooth and rapid gear transitions exactly as you would expect from a top-of-the-range traditional automatic gearbox, with each gear transition taking only 290 milliseconds.

This new EDC gearbox does not require any specific maintenance.

The comfort of an automatic gearbox, the simplicity and responsiveness of a manual gearbox

Renault has developed a new, six-speed, dual clutch transmission gearbox entitled Efficient Dual Clutch (EDC) which demonstrates how Renault want to reconcile comfort, driving pleasure and environment with the ECO2 signature. This ecological and economical automatic gearbox coupled with the dCi 110 engine combines responsiveness, controlled consumption and low CO2 emissions.

The EDC gearbox is available across the core-range dCi 110 FAP (with Particle Filter) engine of the Mégane and Scénic models: Mégane Hatch, Coupé, Tourer and Cabrio, Scénic and Grand Scénic. Thanks to their lower CO2 emissions, the EDC equipped Mégane will be the brand’s first automatic car to qualify for the Renault Eco2 signature with CO2 emissions from only 109g/km (Mégane).

The simplicity of a manual gearbox

The development of the new gearbox has been guided by the practicality of a manual gearbox and the EDC is able to deliver controlled fuel consumption and CO2 emissions.

Renault is proud to announce that the EDC engine delivers low CO2 emissions across Mégane and Scénic. From 109g/km for the Mégane Hatch, Coupé and Sport Tourer and from 124g/km for the Scénic, Grand Scénic & new Mégane Coupé Cabriolet, this engine is able to offer economy alongside the regular benefits of an automatic.

The responsiveness of a manual gearbox

The EDC is a combination of two parallel half gearboxes, which work together and are both designed like a traditional manual gearbox. The engine torque is transmitted to each half gearbox via a specific clutch:

-One clutch looks after the odd-number gears (1st, 3rd and 5th)
-The second clutch covers the even-number gears (2nd, 4th and 6th), as well as reverse.

At the perfect moment gears are changed by shifting from one clutch to the other, the first clutch opens whilst the second closes simultaneously which guarantees continuous and smooth traction during gear changes.

The gears are carried by four shafts: two concentric primary shafts (each of which is connected to a clutch) and two secondary shafts. Gears are matched by means of synchronisers, as is the case with a manual gearbox. These synchronisers, like the clutches, are operated by electric actuators, which are in turn controlled by a control unit, which measures a number of parameters to select the ideal gear.

The system instantaneously adapts to the driver's demands by selecting the gear, which delivers the right amount of power the instant it is required.

The development of EDC as a dry dual–clutch, offers practical implications, by helping to limit friction and consequently deliver better performance.

Additional features include:

-An optimised “creep” function which provides better fluidity especially whilst sitting in traffic jams and during manoeuvres e.g. parking.

-A reassuring assisted hill start support: prevents the vehicle from rolling backwards during a hill start

Grand Scénic

AUTOMATIC EDC GEARBOX

The comfort of an automatic gearbox

The comfort of an automatic gearbox, the simplicity and responsiveness of a manual gearbox

The simplicity of a manual gearbox

The responsiveness of a manual gearbox