(from BMW Press
Release) The new BMW Concept 5 Series ActiveHybrid
Munich: The new concept car offers a particularly good rendition of
the new BMW 5 Series Sedan in all its dynamic, efficient and
innovative qualities, at the same time representing the ongoing
development of the BMW ActiveHybrid X6 and the BMW ActiveHybrid 7
with their drivetrain technology already in production.
The drive system featured in the BMW Concept 5 Series ActiveHybrid
consists of a straight-six gasoline engine with TwinPower Turbo
technology, eight-speed automatic transmission, and electric drive.
Integration of BMW ActiveHybrid technology in a sedan already
extremely efficient with its ďconventionalĒ combustion engine
reduces both fuel consumption and emissions once again by more than
10 per cent. At the same time the electric motor offers a boost
function, supporting the gasoline engine in generating particularly
dynamic drive power for an even more sporting driving experience in
Intelligent energy management likewise serves to enhance the
efficiency of the overall system, its unique functions ensuring
appropriate control and management of all energy paths within the
car and appropriate interaction of the drivetrain components
precisely adjusted to driving conditions.
The drivetrain technology featured in the BMW Concept 5 Series
ActiveHybrid allows all-electric, zero-emission motoring in city
traffic. At the same time a special hybrid-based Auto Start Stop
function offers additional efficiency by consistently switching off
the combustion engine when stopping at the traffic lights, a road
junction, or in congested traffic. Optimised comfort, finally, is
provided by the auxiliary climate control function already featured
in the BMW ActiveHybrid 7.
Special development of
ActiveHybrid technology as part of BMW EfficientDynamics.
The concept car based on
the new BMW 5 Series Sedan for the first time presents the next
generation of BMW ActiveHybrid technology, a special solution
exclusive to BMW for intelligent interaction of the combustion
engine and electric drive focused specifically on the requirements
made of a dynamic sedan in the upper midrange segment.
Taking this approach, BMW is consistently continuing the development
of hybrid technology according to a modular principle (best of
hybrid), thus offering the optimum rendition of BMW ActiveHybrid
technology for each concept and vehicle segment.
In accordance with the BMW EfficientDynamics development strategy,
this ensures highly effective and practical use of hybrid technology
for the reduction of both fuel consumption and emissions.
Also in the BMW Series Sedan segment: the BMW among hybrids combines
supreme dynamics with maximum efficiency.
The combustion engine is supported in the BMW Concept 5 Series
ActiveHybrid by an electrical drive system developed specifically
for this model and arranged in compact dimensions between the
straight-six combustion engine and the automatic transmission.
Drawing its energy from a high-voltage battery at the back of the
car, the electric motor develops maximum output of 40 kW.
An automatic clutch connects the
gasoline engine and the electric motors.
Due to the particularly
high level of torque generated from the start through the electric
motors, the interaction of the two drive systems ensures extremely
spontaneous and dynamic acceleration whenever required.
Perfectly integrated, precisely controlled: high-voltage battery
supplying power to both the electric motor and the on-board network.
In overrun and when applying the brakes, the electric drive systems
acts as a generator developing electric power fed into the
high-voltage battery. This converts kinetic energy otherwise wasted
as heat in the brake system into electric power saved for subsequent
Such energy obtained without any further consumption of fuel may
then be used to generate drive power or operate electrical functions
in the car.
This principle is the same as that of Brake Energy Regeneration
already applied in BMWís current production models, with the level
of electrical energy generated by the electric motor being
significantly greater and the increase in efficiency correspondingly
The high-voltage battery likewise developed for this specific
concept is fitted within a high-strength special case near the rear
axle of the BMW Concept 5 Series ActiveHybrid. This leads to an
optimum position in terms of both safety and harmonious weight
distribution. An integrated control unit permanently analyses the
charge status of the high-voltage battery and controls both the
battery charge process by way of Brake Energy Regeneration and the
system cooling process. Apart from the electric motor, the
high-voltage battery also delivers electric power to the carís
on-board network. Among other things, this allows efficient
operation of the carís auxiliary climate control activated whenever
required by a remote control function to cool down the carís
interior significantly even before starting the engine.
Convenient use of the all-electric driving mode and the Auto Start
Stop function is likewise guaranteed in this way, with all
electrical functions such as the audio system, climate control or
navigation remaining fully available even with the combustion engine
Unique: intelligent energy
management with advance analysis of driving conditions.
technology provides its unique potential in terms of both efficiency
and driving dynamics under all kinds of conditions and throughout a
wide load range.
Unlike conventional hybrid cars whose extra efficiency is largely
limited to city traffic, both the BMW ActiveHybrid X6 and the BMW
ActiveHybrid 7, by combining the combustion engine and the electric
motor, are able to offer significantly lower fuel consumption and
emission ratings also at higher speeds. This is made possible by
technically sophisticated power electronics masterminding the
interaction of the combustion engine and electric motor and thus
optimising the overall efficiency of the drive system as a whole.
The BMW Concept 5 Series ActiveHybrid once again raises the range of
functions provided by such power electronics to an even higher
standard. As an example, the energy contained in the fuel and
provided by the high-voltage battery may now be used even more
specifically and efficiently to provide that Sheer Driving Pleasure
so typical of BMW.
Taking additional factors into account, the interaction of the two
drive units in the BMW Concept 5 Series ActiveHybrid is tailored to
the driverís requirements and current driving conditions with
maximum precision. At the same time the power electronics also
control the operation of the carís ancillary units and comfort
functions, again in the interest of maximum efficiency.
The range and diversity of parameters taken into account by the
system is indeed quite unique in the automobile, just as the number
of functions controlled in this way. A high level of all-round
networking allows the power electronics to provide intelligent
energy management, thus optimising the operating strategy of the
entire vehicle under all conditions.
A further unique feature of energy management in the BMW Concept 5
Series ActiveHybrid is the carís ability to adjust its operating
strategy not just to current, but also to upcoming driving
conditions. To do this the power electronics from the start evaluate
data indicating a possible change in exterior conditions or the
driverís wishes and prepare the components in the drivetrain as well
as the carís electronic system for a possible change in
To analyse driving conditions up front, the system uses data
provided by engine and chassis management as well as the sensors in
the driver assistance systems on board the car. Data saved in the
navigation system on the route chosen by the driver likewise goes
into the final calculation, enabling the system to forecast driving
conditions on the route directly ahead. Then, proceeding from this
analysis, the car is coordinated in advance and the optimum use of
all systems serves to use the energy available with maximum
Should the system determine, for example, that the autobahn ahead is
about to lead downhill, the charge level of the high-voltage battery
is intelligently controlled in advance to regain brake energy
upfront with maximum efficiency.
Similarly, the high-voltage battery may be fully charged in good
time before the driver reaches his destination, enabling the system
to switch off the combustion engine at an early point and change to
all-electric drive along the final stretch of road. Indeed, this
forward-looking function is able to extend the cruising range on
electric power by up to 30%.
The BMW Concept 5 Series
ActiveHybrid: the future of driving pleasure
and efficiency in the upper midrange segment.
Optimised to an even
higher standard in the BMW Concept 5 Series ActiveHybrid, the
drivetrain and control systems underline the great significance of
hybrid technology as a cornerstone of BMW EfficientDynamics. Looking
at a new generation of hybrid technology from BMW featured in the
BMW Concept 5 Series ActiveHybrid therefore offers particularly
attractive perspectives, the ongoing development of BMW ActiveHybrid
technology serving to provide substantial progress in all areas
leading to a harmonious all-round concept with distinctive features
typical of the brand.
The BMW Concept 5 Series ActiveHybrid is therefore more dynamic,
efficient and more intelligent than conventional representatives of
this drive technology, standing out clearly as the BMW among hybrid
cars in this segment.
The BMW Group
The BMW Group is one of
the most successful manufacturers of automobiles and motorcycles in
the world with its BMW, MINI and Rolls-Royce brands. As a global
company, the BMW Group operates 24 production facilities in 13
countries and has a global sales network in more than 140 countries.
The BMW Group achieved a global sales volume of approximately 1.29
million automobiles and over 87,000 motorcycles for the 2009
financial year. Revenues for 2009 totalled euro 50.68 billion. At 31
December 2009, the company employed a global workforce of
approximately 96,000 associates.
The success of the BMW Group has always been built on long-term
thinking and responsible action. The company has therefore
established ecological and social sustainability throughout the
value chain, comprehensive product responsibility and a clear
commitment to conserving resources as an integral part of its
strategy. As a result of its efforts, the BMW Group has been ranked
industry leader in the Dow Jones Sustainability Indexes for the last