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01 Aug 2011

BMW Concept i3: dynamic, urban and free of emissions

  • Written by Aitor

The BMW Concept i3 the vehicle is designed to be sustainable result in city traffic. Being a car that only has an electric motor and made for sustainable and emission-free mobility, is the smartest way to move in urban and extra-urban environments shape.

This is a vehicle with a coherent overall concept. Every detail has been designed and optimized according to their subsequent use in the vehicle. The BMW Concept i3 is light, safe, spacious and dynamic thanks to the innovative LifeDrive architecture. Innovative materials and intelligent lightweight materials not only achieve high autonomy and high impact resistance, but also contribute to a highly dynamic behavior. The electric motor applies its power to the rear axle is rated at 125 kW (170 CV) and considerable 250 Nm torque. At this turning radius is very small sum. Thanks to these qualities, BMW i3 behavior is extremely agile. The BMW Concept i3 is able to stop the clock in less than four seconds to accelerate from a 0 60 km / h and accelerates from 0 to 100 km / h takes less than eight seconds.

The so-called Life-Modul allows the interior is very wide, result of a unique design not based on the adaptation of existing platforms. Careful selection of materials for creating an environment of open and transparent character in the interior, where it is possible to feel very welcome from the first moment. The interior components are used primarily made from renewable raw materials, so obvious the sustainability of the vehicle. Parts of the instrument panel and door linings are visible natural fibers. Natural leather upholstery of the seats gives the interior an atmosphere that radiates comfort. The BMW i3 Concept is a very suitable car for everyday use, since it has four comfortable seats, doors opening in the opposite direction and in wide angle, has a trunk with a volume of about 200 liters and has a functional space Additional store objects in the front.

Innovative connectivity functions manage to create a network that includes the BMW Concept i3 in the world that determines the lifestyle of the client. Using the remote functions that are accessed with a smartphone, you can locate the car, learn about the nearest recharge, load and condition in advance the energy storage by simply pressing a button and receive related to the current status data vehicle. The driver with the help of various intelligent assistance systems in adverse driving situations such as traffic jams or accidents, so you can reach your destination more relaxed and safe manner.

The LifeDrive architecture of the BMW Concept i3
Unlike the conversion strategy applied to the present, which provides for the integration of electrical components in cars originally designed for combustion engines, the innovative LifeDrive architecture applied in BMW cars i specifically considers the demands electric motor . This way you can install the electric motor and the energy storage in optimal locations. This advantage adds to the clever use of light and innovative materials.

Both the BMW Concept i3 as the BMW Concept i8 have a LifeDrive architecture. However, the two models differ in the geometric implementation of the concept, both adapted to the specific purpose of each car. In the case of BMW i3 Concept, the LifeDrive concept has a markedly horizontal division.

The drive module of this model is the basis for the Life module, which means that this part of the structure is simply mounted on top of the first. This functional composition of the LifeDrive architecture is explained by the large size of the accumulator. The accumulator i3 Concept BMW has especially large for the autonomy of the electrical conduction is greater. The battery cells are fully integrated in the underbody, making optimum use of the available space. Its assembly below the total central surface of Drive module provides benefits for driving dynamics. With this mounting position, weight distribution between the axles is optimal and the center of gravity of the car is very low.

The tank is surrounded by an aluminum profile that protects against external impacts. Before and after the accumulator there are two structures of programmed deformation, capable of absorbing energy of a collision or the rear of the car. Whereas the electric drivetrain is much more compact than a comparable combustion engine, it has been possible to assemble the electric motor, gearbox and power electronics in a very small space just above the rear drive shaft, thanks to extremely ingenious solutions. The BMW Concept i3 represents the optimum LifeDrive architecture configuration for a propelled solely by an electric motor vehicle.

Since all drivetrain components are included in the Drive module in the cabin there is no central tunnel that previously required to transmit the force of the front engine to the rear wheels. Therefore, the BMW Concept i3 has a much more spacious interior than other vehicles with the same wheelbase and also allows you to apply solutions that are optimal for urban mobility, as seating rows without central interruption.

The BMW Concept offers i3 enough for four adults-men to seat comfortably. Its trunk about 200 liters to store a sufficient amount of luggage.

The chassis of the BMW Concept i3 was also specially designed for use in the city. The small turning radius and direction of reactions direc-tions result in extraordinary agility, especially in low-speed driving.

Purely electric: the BMW Concept i3
The electric motor of the BMW Concept i3 is specially designed for use in the city. This engine is rated at 125 kW / 170 hp and torque of Nm 250. As is typical for electric motors, torque is immediately available, which means that there has to be generated by increasing the speed as in a combustion engine. Therefore, the BMW Concept i3 is extremely agile and acceleration capability is impressive: The BMW Concept i3 can stop the clock in less than four seconds to accelerate from a 0 60 km / h and accelerates from to 0 100 km / h takes less than eight seconds.

Furthermore, the high torque is available over a wide speed range, so the power delivery is very smooth. The case of one connection transmits power to the rear wheels optimal way. With this box, the BMW i3 can reach speeds of up 150 km / h accelerating without interrupting the transmission of force.

Furthermore, the electric motor can decelerate the car using the gas pedal. By the time the driver takes his foot off the accelerator, the electric motor acts as a generator, which feeds the braking energy to the car battery. At the same time a moment of braking enough to significantly slow the car generates. This driving with one pedal ("One-Pedal-Feeling '), ie the possibility of accelerating and braking with one pedal, accentuates the typical feel of an electric car to be" floating "on the track. When the driver takes his foot off the pedal, are "disengaged" by regulating the zero point of the electric motor, using the kinetic energy itself as a driving force. In these circumstances, the BMW Concept i3 seems to be planning on asphalt, without consuming energy.

Compact and powerful: the electric motor
The engine of the BMW Concept i3 not only characterized by its friendly mode of operation. The innovative character of the electric motor is particularly evident through the relationship between the power and the space it occupies. Thanks to the work of development studied, the electric motor of the BMW Concept i3 occupies space 40 percent lower than the engine of the MINI E. The compact and powerful motor, the power electronics and the gear included in the differential are mounted on the rear axle and the set does not invade the interior.

The power supply to the electric motor and all other consumer units is in charge of lithium-ion cells specially developed for this purpose. The accumulator i3 Concept BMW has also been optimized in every detail, so that external influences affect much less the availability of electrical power. Further, the intelligent system of heating and cooling ensures that the energy accumulator is always have an optimum operating temperature, thereby increasing the performance and lifetime of the cells. Once the battery is connected to the outlet, is fully charged in six hours. Resorting to fast charge mode, it reaches a 80 percent of full charge within one single hour.

Range Extender for greater autonomy
As demonstrated by tests with the MINI E, the autonomy of this model was able to satisfy the 90 percent of the mobility needs of people who formed the test group. But considering that some customers demand more autonomy and a maximum level of flexibility, the Range Extender System (REx) that increases the autonomy of the car was included in the BMW Concept i3. REx is a small petrol engine very quiet operation that triggers an alternator in order to maintain a constant level of battery power, so the car can keep running for longer with the electric motor.

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