Thursday, June 16, 2011

Smart Electric Drive, the city "clean"

Smog and noise goodbye. In the cities of the future air pollution and noise would be a sad reminder of the past thanks to the advent of electric cars. A prospect that is becoming more real with the progressive-market zero-emission models. Like the Smart Fortwo Electric Drive, an acronym that identifies the version on batteries, the electric drive of the city car of Daimler.

We tested on the streets of Riccione and hills of Romagna. Identical to the thermal variations in design and size, the ED is 2.7 meters long and 1.56 wide. Smart numbers that make this ideal for moving in the narrow streets and find parking in crowded urban streets. Unaffected well as the cabin that offers adequate space for two tall adults.

The credit is of very thin lithium-ion batteries that have allowed them into the floor under the seats without stealing precious centimeters in height. Similarly, the compact electric motor connected directly to the rear wheels allowed to leave unchanged the capacity of 220-340 liters of luggage, a sufficient volume for two trolley bag or some shopping.

Comodo also the compartment in the flap which houses the power cable to connect the socket with port located at the place of the union of fuel supply. If the design of the bridge is that of the other smart, if not for the absence of the front of the passenger compartment door, is to change the instrumentation.

In particular, those in the two circular elements placed in the top center of the dashboard to replace clock and rev counter means the battery life indicator and that of fuel consumption. A device, that device, which in addition to indicate the "current" is used by pressing the accelerator, it displays the energy recovered during deceleration and braking.

Small variations are also in the dashboard, where it appears a convenient digital clock and a bar that indicates the "performance" of the batteries. To clarify that the ED has something special is the switch where, apparently, nothing happens except the lights and dashboard illumination.

After the initial disorientation, just select the "D" of the automatic transmission and release the brake to start moving in absolute silence. Pressing on the accelerator the Smart shooting with a certain decision using the 120 Nm of torque available from low revs and 41 hp electric motor.

The boost is progressive up to 60 km / h are reached in 6.5 seconds officially. Above that limit the acceleration decreases significantly making it "hard" to reach the top speed stated, the 100 km / h. Conduct designed to preserve the autonomy and that, in our opinion, is justified by the use of the prevailing urban fortwo electric.

Environment where we can appreciate even more than the maneuverability and agility afforded by bulk micro and good turning radius. If in urban areas and is in its ideal environment, outside the city especially appreciate the smooth handling and the inertia that, if properly exploited, allow adequate distances.

When tested on the hills of Romagna we were able to travel 60 km using only 40% of the 16.5 kWh lithium-ion batteries, which is 6.6 kWh. A value that requires little more than two hours to be restored (full charge from a standard 220 volt outlet occurs in about 8 hours) and that translated into total autonomy is equivalent to a theoretical distance of 150 km, which is 15 more than the given declared by Smart.

To support our result has been realized that provides a guide to substantially accelerate to reach the desired speed and the maintenance of the same with slight pressure on the accelerator. But the exclusion of any type of electronic device that could absorb the current. Also, if the hilly course has a lot of energy to climb, the descent got many miles "free" and also allowed a reasonable recharge the batteries.

Overall, there seemed very smart and fun to drive and great for driving in the city. For trips out of town, in addition to the lack of autonomy, the more limits are given by the reduced power, particularly noticeable in the steepest hills, and the maximum speed of 100 km / h, which makes it unsuitable for transfers on the highway.

Also improved the braking, not because of efficacy (there always seemed safe), but the pressure is higher than normal that you should put on the brake pedal. Conversely, positive economic analysis. Given the energy cost of about € 0.15, our tour around Riccione cost us about one euro, compared with € 2.7 of the theoretical thermal cheaper sister, the cdi diesel from 0.8 liters.

The model tested is one of the 140 Smart ED already circulating in Italy under the project e-mobility vehicles such as demonstration. The debut of "true" by the dealerships is planned for 2012, even if you do not yet know the price lists or other formulas of acquisition (renting to 500 € / month including up charges) will be confirmed.

What is certain is that the construction will remain the top of the range, that is, the Passion, which includes, among other things, air conditioning, electric windows, central locking, dual airbags, 12-spoke alloy wheels and fog lights.

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