The technical highlights of the new Mercedes b-class


Download 92.74 Kb.
NameThe technical highlights of the new Mercedes b-class
page1/3
A typeDocumentation
manual-guide.com > manual > Documentation
  1   2   3



Press Information

11 July 2011



The technical highlights of the new Mercedes B-Class

Efficiency and Safety







Contents

Page







Short version




A quantum leap in the compact class

2







Long version




The chassis and suspension




Refined sportiness for the sports tourer

8







Aerodynamics




Taking the drag out of aerodynamics

11







Drive system




High tech under the bonnet

13







Radar-based collision warning system




A new milestone in safety technology

21







The new driving simulator




Fast response and a photorealistic environment

24






The descriptions and information in this press kit apply to the international Mercedes-Benz model range and may vary from country to country.


A quantum leap in the compact class


  • Sensational: outstanding aerodynamics set a new benchmark

  • Efficient: drive system with new engines and dual clutch transmission

  • Safe: radar-based COLLISION PREVENTION ASSIST with adaptive
    Brake Assist


  • Spacious: flexible vehicle concept, also prepared for alternative drives

Substantially more agile and efficient, but as comfortable and spacious as ever – the new B-Class from Mercedes-Benz is a winner on all fronts. The vehicle's lower height and more upright seat position provide for a first impression that hints at the compact sports tourer's dynamic credentials.

With a new four-cylinder petrol engine featuring direct injection and turbocharging, a new diesel engine, a new dual clutch transmission, a new manual transmission and new assistance systems, the front-wheel drive car also rings in a new technological era for compact cars from Mercedes-Benz.
"No model change in the history of Mercedes-Benz has ever seen so
many new developments introduced in one fell swoop," stresses
Dr. Thomas Weber, Member of the Board of Management responsible
for Group Research and Head of Development, Mercedes-Benz Cars.
"Future B-Class customers will benefit from this quantum leap in terms
of exemplary low fuel consumption and CO2 emissions combined with driving pleasure, plenty of space and the customary high standard of safety from Mercedes-Benz."

The world premiere of the new B-Class (length/width/height: 4359/1786/
1557 millimetres) will take place at the Frankfurt International Motor Show (13 to 25 September 2011). It will be making its way to European dealers in November 2011.

Outstanding aerodynamics: astounding cd value despite station wagon rear end

An outstanding drag coefficient of cd = 0.26 places the new B-Class at the forefront of its market segment. Apart from the aerodynamic exterior design, numerous optimisation measures on points of detail such as the air flow around the front wheels, the underbody design and the cooling air flow are also crucial contributory factors to this excellent aerodynamic performance. Patents are pending for innovative details such as the serrated wheel arch spoiler. With the optional ECO Technology package, which will be available at a later date, the B-Class even achieves the world-class aerodynamic credentials of the
E-Class Coupé, attaining a drag coefficient of cd = 0.24 which is nothing short of sensational for a vehicle with a station wagon rear end.

New engines, new transmissions: designed for maximum efficiency

The new B-Class features new petrol and diesel engines as well as new manual and automatic transmissions. All transmissions and engines have been developed in-house, with production taking place at the plants in Stuttgart-Untertürkheim and -Hedelfingen, Rastatt/Baden, Gaggenau/Baden and Kölleda/Thuringia. The simultaneous development process enabled perfect coordination of engines and transmissions, e.g. with regard to implementation of the ECO start/stop function which features as standard on all B-Class models.

Common features of the new drive systems are the use of state-of-the-art technologies for maximum efficiency, very smooth running, high tractive power right from low revs, sustainability in terms of compliance with forthcoming emissions standards and low weight. For the purposes of transverse installation the engines, all of which are turbocharged, and the
two transmissions are very compactly designed, providing the B-Class with an exemplary small turning circle for a front-wheel drive vehicle of under eleven metres. The engine and transmission suspension disposes of a four-point mounting system comprising engine mount, transmission mount and two self-aligning supports. This suspension system has been designed specifically to meet the requirements of the high-torque engines with regard to minimum noise levels.  The hydraulic damping integrated in the transmission mount
is a key contributory factor to the exceptionally high ride comfort.

The new four-cylinder petrol engines (internal designation M270) mark the launch of a completely new engine series. The combustion process is based
on the third-generation Mercedes-Benz direct injection system which was introduced last year with the BlueDIRECT V6 and V8 engines. Its use in the
B-Class marks this technology's debut in the compact segment. The new
four-cylinder engines have been designed for both transverse and longitudinal installation. In the new B-Class they are initially available with a displacement of 1.6 litres, as the B 180 rated at 90 kW (122 hp) and the B 200 with an output of 115 kW (156 hp). Their maximum torque of 200 and 250 Nm respectively is available from an engine speed of 1250 rpm.

The new four-cylinder diesel engine is a further development of the OM651 deployed in the C- to the S-Class, a common rail direct-injection engine of the third generation. With its displacement scaled down to 1.8 litres and numerous optimised points of detail, this is the first time that the compression-ignition engine has been mounted transversely in a Mercedes-Benz car. The B 180 CDI generates 80 kW (109 hp) of power, while the B 200 CDI has an output of
100 kW (136 hp). The maximum torque stands at 250 Nm from 1400 rpm
for the 80 kW variant and 300 Nm from 1600 rpm for the 100 kW variant.

Another Mercedes-Benz premiere is the new 7G-DCT dual clutch transmission in the B-Class. This transmission is extremely compact, extremely variable with regard to adaptation of the engine speed thanks to seven gears, incorporates an electric oil pump for start/stop capability, shifts gear without any interruptions in tractive power and combines the comfort
of an automatic with the efficiency of a manual transmission.

The new 6-speed manual transmission designed along similarly compact lines as a three-shaft transmission is a close relative of the DCT. Extremely easy gear shifting, low shift forces, low internal friction and a low weight
are among its most important characteristics.

Chassis and suspension: refined sportiness now for the sports tourer, too

"Fascinatingly agile" is the assessment of all test drivers who have put the
new B-Class through its paces to date. Three factors are instrumental to the substantially enhanced dynamic performance in comparison to its predecessor, which does not come at the cost of any compromises on comfort: the lowered centre of gravity, the new four-link rear axle and the upgraded ESP® Electronic Stability Programme. A sports suspension is optionally available for further enhanced agility. This suspension is lowered by 20 mm for an even lower centre of gravity and features sports dampers with amplitude-selective damping and a Direct-Steer system to emphasise the car's sporty character.

Steering: mechanical with electric assistance

The electromechanical steering of the B-Class has been redesigned. The electric motor of the servo assistance system is now located directly on the steering gear as a dual pinion EPS system, thereby optimising the package as a whole. A Direct-Steer system is available in combination with the sports package. Locating the EPS system here results in a noticeably more direct steering ratio over the turning angle with the aid of the variable ratio. This enhances the vehicle's handling and agility substantially.

The electromechanical steering system makes an important contribution to the vehicle's overall efficiency, as the steering assist function only requires energy when steering actually takes place.

New assistance and braking system reduces the risk of rear-end collisions

As a world first in the compact segment, the B-Class features a radar-based collision warning system with adaptive Brake Assist as standard, which lowers the risk of rear-end collisions. The COLLISION PREVENTION ASSIST system gives a visual and acoustic warning to alert a possibly distracted driver to identified obstacles, and prepares Brake Assist for the most precise possible braking response. This is initiated as soon as the driver emphatically operates the brake pedal.

In contrast to other systems available on the market for the compact class, the new COLLISION PREVENTION ASSIST feature is not merely an urban driving system designed to minimise the effects of minor collisions. Rather, this innovative solution aims to provide protection against typical rear-end collisions in all dangerous driving situations at speeds of over 30 km/h. Mercedes-Benz expects the new safety system to have a significant, positive effect on accident statistics.

The democratisation of safety also encompasses an array of other assistance systems which have been adopted into the B-Class from the larger model series. These include:

  • Adaptive Headlamp Assist

  • Blind Spot Assist and Lane Keeping Assist

  • ATTENTION ASSIST (standard)

  • Speed Limit Assist (speed limit sign recognition)

  • Active Parking Assist

  • Brake HOLD function (standard with 7G-DCT)

  • Hill Hold function

  • Linguatronic

  • Reversing camera

  • DISTRONIC PLUS with BAS

  • PRE-SAFE® (featuring for the first time in this class of vehicle).

Driving simulator: performance capabilities unsurpassed in the
car industry


Fine-tuning of the safety systems prior to deployment in real test-drive conditions took place in the new driving simulator at the company's Technology Centre in Sindelfingen. With its 360° screen, fast electric
power system and the twelve metre-long rail for transverse or longitudinal movements, the dynamic driving simulator is the most powerful in the entire car industry. It went into operation at the end of 2010.

A dome measuring 7.5 metres in diameter is mounted on six individually extendable cylinders forming a so-called hexapod and on a linear motion system. A complete vehicle is installed in the dome. The inner surface of
the dome serves as a projection panel on which road traffic situations are displayed true-to-life, with moving pedestrians, oncoming traffic and housing. The handling of any current or future Mercedes model can be simulated mathematically and the test driver experiences the calculated vehicle movements realistically and in real time by means of the motion system.

Plenty of space inside, prepared for alternative drives

The new vehicle concept underscores the dynamic aspirations of the new
B-Class. The most striking aspect is the reduced height: at 1557 millimetres, the new model crouches almost five centimetres lower on the road than its predecessor. The seat height in relation to the road has also been reduced (minus 86 mm). In response to requests from many customers, the seat position is more upright, however. The headroom has nevertheless been further improved. With 1013 mm of headroom at the front (without sliding roof), the B-Class is among the most spacious cars in its segment in this discipline, too.

The B-Class is optionally available with the so-called EASY-VARIO-PLUS system. This enables simple reorganisation of the interior so as to enable the transportation of bulky items. Features of the EASY-VARIO-PLUS system include fore/aft adjustment of the rear seats by up to 140 millimetres and
a front passenger seat whose backrest can be folded forward onto the seat cushion.

The new B-Class features an enhanced variant of the sandwich floor. The modular "Energy Space" concept means that it is already designed to accommodate versions with an alternative drive: appropriate interfaces in the body shell enable the main floor panel to be modified and a step to be produced for the versions with alternative drive. This multifunction well begins under the driver's seat and offers space for the alternative energy accumulators.

Contact:
Norbert Giesen, tel.: +49 (0)711 17-76422, norbert.giesen@daimler.com
Wolfgang Zanker, tel.: +49 (0)711 17- 75847, wolfgang.zanker@daimler.com
Frank Bracke, tel.: +49 (0)711 17-75852, frank.bracke@daimler.com

Further information about Mercedes-Benz is available online: www.media.daimler.com and www.mercedes-benz.com

The chassis and suspension
Refined sportiness for the sports tourer

  • Chassis and suspension: new four-link rear axle, sporty ESP® tuning

  • Steering: new electric power steering with assistance functions

  • Brakes: electric parking brake improves overall package

"Fascinatingly agile" is the assessment of all test drivers who have put the new B-Class through its paces to date. Three factors are instrumental to the substantially enhanced dynamic performance in comparison to its predecessor, which does not come at the cost of any compromises on comfort: the lowered centre of gravity, the new four-link rear axle and the upgraded ESP® Electronic Stability Programme.

On the four-link rear axle, the arising forces are absorbed by three control
arms and one trailing arm per wheel. This means that longitudinal and lateral dynamics are virtually independent of one another. Wheel carriers and spring links consist of aluminium, in order to reduce the unsprung masses.

Mercedes-Benz is deploying the latest ESP® generation in the B-Class for the first time. Torque Vectoring Brake helps to counter the tendency towards oversteering during fast cornering. Specific steering impulses assist the driver. The engineers' overall aim has been to provide gentle intervention by the ESP® system which will afford the B-Class's occupants protection whenever possible, without detracting from the pleasures of driving: experienced motorists can drive very speedily, while less experienced drivers with a less well-rounded driving style will be reminded of the physical limits involved in driving whenever possible.

Steering: mechanical with electric assistance

The electromechanical steering of the B-Class has been redesigned. The electric motor of the servo assistance system is now located directly on the steering gear as a dual pinion EPS system, thereby optimising the package as a whole. The steering system makes an important contribution to the vehicle's overall efficiency, as the steering assist function only requires energy when steering actually takes place. A Direct-Steer system is available in combination with the sports package. Locating the EPS system here results in a noticeably more direct steering ratio over the turning angle with the aid of the variable ratio. This enhances the vehicle's handling and agility substantially. The electric power steering also enables various steering assistance functions which are activated by the ESP® control unit. These include:

  • Counter-impulse in case of oversteering

  • Corrective steering when braking on road surfaces offering different levels of grip (split-fraction braking)

  • Mitigating the extent to which the front-wheel drive influences
    the steering

  • Compensating crosswind and road gradients

  • The electric power steering also makes Active Park Assist possible.


With a turning circle of under eleven metres in diameter, the B-Class is particularly agile.

On all engine variants, the B-Class comes with disc brakes on all wheels. The callipers on the rear axle and the brake boosters are made of aluminium. For the first time in the compact class, the HOLD function which is familiar from the larger model series has been adopted into the B-Class: when stopping, for example at traffic lights, the driver merely has to press the brake pedal slightly more firmly. They can then take their foot off the brake pedal and the brake will remain engaged until they move off again. The brake is released automatically when the driver steps on the accelerator. On versions with manual transmission, the Hill Hold function automatically prevents the
vehicle from rolling back unintentionally when starting on a slope.

Mercedes-Benz is equipping the B-Class for the first time with an electric parking brake, which operates by means of actuator motors acting on the callipers of the rear axle. The parking brake is activated via a button under
the light switch on the left of the dashboard. This creates additional space in the centre console, as the handbrake lever is no longer required. When the button is pressed at speeds of over 4 km/h, the parking brake acts as an emergency brake, activating all four wheel brakes via the ESP®'s hydraulic unit.

In conjunction with the automatic transmission, the parking brake offers a particularly convenient mode of functioning: when the driver accelerates sufficiently after fastening their seat belt, the parking brake is released automatically.

Aerodynamics
Taking the drag out of aerodynamics

  • New benchmark for cars with station wagon rear end: cd = 0.26

An outstanding drag coefficient of cd = 0.26 places the new B-Class at the forefront of its market segment. With the optional ECO Technology package, which will be available at a later date, the five-door B-Class even achieves the world-class aerodynamic credentials of the E-Class Coupé, attaining a drag coefficient of cd = 0.24 which is nothing short of sensational for a vehicle with a station wagon rear end. In practical driving, aerodynamics have a crucial influence on fuel consumption: an improvement in the cd value of just 0.01 results in fuel savings of up to 0.4 litres per 100 kilometres at a speed of
130 km/h.

"A whole range of measures were necessary in order to attain the excellent drag coefficient of cd = 0.26," explains Dr. Teddy Woll, Head of Aerodynamics at Daimler AG. "Apart from an aerodynamically efficient basic design, these include numerous optimisation measures on points of detail, such as the air flow around the front wheels, the underbody design and the flow of cooling air."

Designers and aerodynamicists worked closely together. Aerodynamically efficient lines are demonstrated by the exterior mirrors with braces, for example. The low height of the shoulder on the A-pillar accompanied by optimised A-pillar geometry also contributes to the good aerodynamics. The entire front apron is sealed, including special seals fitted on the headlamps, for example. The large roof spoiler at the rear provides for defined flow separation.

Flow losses at the front wheel arches have been reduced substantially with the aid of innovative serrated wheel spoilers at front and rear - patent pending -, slots in the wheel arches and optimised hub caps. These measures result in improved wind flow around the wheel arches.

Equally comprehensive measures have been undertaken to design the underbody along aerodynamic lines. The main floor panel features extensive cladding up to the rear wheel arch, followed by additional cladding of the rear axle. The rear silencer has also undergone aerodynamic optimisation.

The improved cooling air flow by means of an adjustable radiator shutter which is familiar from other Mercedes models now features on the basic petrol-engine model in the B-Class. This feature enables infinite adjustment of the air flow through the engine's cooling module and the engine compartment by means
of a circular louvred shutter installed in parallel with the fan. When there is
no special need for cooling air, the shutter is closed. This improves the aerodynamics and reduces fuel consumption.

The ECO Technology package, which will be optionally available for all versions of the B-Class, incorporates additional optimisation measures designed to further reduce drag. These include lowering of the body, the sealing of joints at the rear window and the cladding of chassis components
at the rear axle.

The aerodynamics of the new B-Class were optimised at an early stage in the development process by means of complex computer calculations and flow simulations. Over 275,000 CPU hours were required for the purposes of digital flow simulation. Models and prototypes spent around 1100 hours in the wind tunnel for measurement purposes.

The drive
High tech under the bonnet

  • New petrol engine series M270: displacement of 1.6 and 2.0 litres

  • New diesel engine OM651/D18: maximum efficiency

  • New 7G-DCT dual clutch transmission: a new quality of automatic
    gear shifting


  • New manual transmission F-SG 310: 6 gears in compact design

  • ECO start/stop function: standard on all models

A model change that takes place under the bonnet, too: the new B-Class features new petrol and diesel engines as well as new manual and automatic transmissions. All transmissions and engines have been developed in-house, with production taking place at the plants in Stuttgart-Untertürkheim, Stuttgart-Hedelfingen, Rastatt/Baden, Gaggenau/Baden and Kölleda/Thuringia. The simultaneous development process enabled perfect coordination of engines and transmissions, e.g. with regard to implementation of the ECO start/stop function which features as standard on all B-Class models.

Common features of the new drive systems are the use of state-of-the-art technologies for maximum efficiency, very smooth running, high tractive power right from low revs, sustainability in terms of impending emissions standards and low weight. For the purposes of transverse installation the engines, all of which are turbocharged, and the two transmissions are very compactly designed, providing the B-Class with an exemplary small turning circle for a front-wheel drive vehicle of under eleven metres. The engine and transmission suspension disposes of a four-point mounting system comprising engine mount, transmission mount and two self-aligning supports. This suspension system has been designed specifically to meet the requirements of the high-torque engines with regard to minimum noise levels.  The hydraulic damping integrated in the transmission mount is a key contributory factor to the exceptionally high ride comfort.

The new four-cylinder petrol engines (internal designation M270) mark the launch of a completely new engine series. The combustion process is based
on the third-generation Mercedes-Benz direct injection system which was introduced last year with the BlueDIRECT V6 and V8 engines. Its use in the
B-Class marks this technology's debut in the compact segment. The new four-cylinder engines have been designed for both transverse and longitudinal installation. In the new B-Class they are initially available with a displacement of 1.6 litres, as the B 180 rated at 90 kW (122 hp) and the B 200 with an output of 115 kW (156 hp). Their maximum torque of 200 and 250 Nm respectively is available from an engine speed of 1250 rpm.

The new four-cylinder diesel engine is a further development of the OM651 deployed in the C- to the S-Class, a common rail direct-injection engine of the third generation. With its displacement scaled down to 1.8 litres and numerous optimised points of detail, this is the first time that the compression-ignition engine has been mounted transversely in a Mercedes-Benz car. The B 180 CDI generates 80 kW (109 hp) of power, while the B 200 CDI has an output of
  1   2   3

Share in:

Related:

The technical highlights of the new Mercedes b-class iconThe Mercedes-Benz management team on the cla-class

The technical highlights of the new Mercedes b-class iconYokohama's "advan" to Come Factory-Equipped on New Mercedes-Benz s-class Models

The technical highlights of the new Mercedes b-class iconRE: Which class of taxpayer are you? Wrong, which class of tax payer aren't u

The technical highlights of the new Mercedes b-class iconThe an/usq-82(V) is the mission critical, general purpose, control...

The technical highlights of the new Mercedes b-class iconReport Highlights

The technical highlights of the new Mercedes b-class icon2. Highlights at a Glance. 10

The technical highlights of the new Mercedes b-class iconWerehunter Mercedes Lackey

The technical highlights of the new Mercedes b-class iconWerehunter Mercedes Lackey

The technical highlights of the new Mercedes b-class iconBuick regal vehicle highlights

The technical highlights of the new Mercedes b-class iconThe Chrome Borne by Mercedes Lackey

The technical highlights of the new Mercedes b-class icon carsoft mercedes 4 (Coverage) Page 1/8

The technical highlights of the new Mercedes b-class iconResearch highlights benefits of virtual worlds 14

The technical highlights of the new Mercedes b-class iconLager novih Mercedes Benz vozila

The technical highlights of the new Mercedes b-class iconBorn to Run by Mercedes Lackey and Larry Dixon

The technical highlights of the new Mercedes b-class iconMercedes-Benz with "all-rounder" and new Sprinter drive system

The technical highlights of the new Mercedes b-class icon2014 gmc acadia highlights safety, convenience features

The technical highlights of the new Mercedes b-class iconBrain Ships Anne McCaffrey Mercedes Lackey Margaret Ball

The technical highlights of the new Mercedes b-class iconExpert in Embedded Software: rtos, Linux, Networking, Wireless, Firmware Experience Highlights

The technical highlights of the new Mercedes b-class iconSub: Prevention and prohibition of Ragging in technical Institutions,...

The technical highlights of the new Mercedes b-class iconBrent is a result oriented executive who has earned business and...




manual


When copying material provide a link © 2017
contacts
manual-guide.com
search