2009 MercedesBenz GLK 4MATIC Details

3 Мар 2015 | Author: | No comments yet »
Mercedes-Benz GLK 220 CDI AT Special Series

2009 Mercedes-Benz GLK 4MATIC

Soon it will be time to for the ski slopes again, and drivers of models with the permanent system 4MATIC can rest as they set off en route to their winter paradise. Because the of the drive configuration on roads by snow or ice is truly impressive. is demonstrating the high traction coupled with excellent stability and safety in the new GLK at its 4MATIC

In extreme winter conditions at a of 2500 meters on the Austrian High Alpine Road compact SUV is demonstrating that its dynamics really are in a class of own.

As is the case with fine-tuning on a dry or wet road, directional and therefore the active safety of the is always to the fore when conditions prevail, too. The 4MATIC mechanism with a percent torque split the front and rear axles with the multiple-disc limited-slip differential with a basic torque of 50 Nm adds up to an ideal This basic design high traction since, on the one the dynamic shift in axle toward the rear axle occurs during acceleration is to deliver more drive to the rear. Meanwhile, the multiple-disc center differential can also shift the drive torque 30 to 70 or 70 to 30 percent between the front and axle, whenever the road so dictate. As such, the electronic systems ESP, 4ETS or intervene as late as possible; the of the torque is converted into on slippery roads.

All interventions go unnoticed, but the drivers are still immediately if they are driving on the In this case a yellow light flashes in the instrument – a clear signal to adjust driving style to the road

The arrangement featuring a permanent mechanism has key advantages over systems that first to diagnose a lack of traction activating their 4×4 drive. The 4MATIC on the GLKwill already made use of this time to transmit drive via the wheels to the road.

4ETS: “automatic start-off aid” for ice and

When pulling away in conditions the engineers use the off-road on the GLK4MATIC to develop optimum Certain road conditions are detected and the interventions of the 4ETS traction control system so that as much acceleration as can be achieved with minimal slip, providing optimum stability in the process. This also allows the vehicle to away under adverse such as when one side of the is on an icy slope (the so-called or both wheels on the front or axle have limited (µ-jump).

Stable conditions on roads

On winding roads with snow and ice, stability is primarily controlled by of engine torque regulation in the skid control system Taking into consideration the and lateral dynamics of the vehicle determined by the ESPsensor system, the thresholds are adjusted according to the situation. In order to ensure driving conditions, on winding the longitudinal force must be via engine torque regulation in a way that sufficient lateral is always available. In order to with this law of physics, driving on winding roads the thresholds for engine torque on the outer wheels are reduced at low frictional coefficient, ensuring the tyres can develop sufficient force.

4MATIC: top performance in all areas

The drive system in the GLKis the most powerful all-wheel-drive there are; its control break new ground. Advantages other systems with a installed drive unit are thanks to the basic compact, and friction-loss-optimised design with its positioned engine and integrated and transfer case. Fuel for example, is at the same level as of a comparable, conventionally driven whilst noise and vibration are on a par with those in higher categories.

105 years of all-wheel-drive from Mercedes-Benz

The history of drive from Mercedes-Benz way back in 1903, when Daimler, the son of the company’s founder, the foundations for designing vehicles all-wheel drive. Since the accepted maxim has been all-wheel drive is the number-one for making better and safer on poor roads. As the decades it is successfully introduced in a variety of vehicles, in both passenger and commercial vehicles. Some such as the G-Class and the Unimog, attained legendary status all the world. But all-wheel drive has its in everyday driving on asphalt too, as demonstrated by the saloons and utility vehicles (SUV) Mercedes-Benz.

4MATIC available in no than 51 Mercedes models

The all-wheel-drive line-up includes model series and offers an range of options: starting the C-Class and E-Class, both as saloon and estate versions 4MATIC, through the S-Class, the CL Coupé and the R-Class touring the Stuttgart-based manufacturer offers the GLKSUV as well as the GL-Class and off-roaders. The evergreen G-Class which really comes its own off the beaten track, will be 30 years of loyal service year. It has a reputation as being one of the best cross-country vehicles and is one of 51 passenger car models which offers with permanent drive.

4MATIC control for wintry road conditions: possible traction, stable and handling As is the case with fine-tuning on a dry or wet road, directional and therefore the active safety of the GLK is always to the fore when conditions prevail, too. The 4MATIC mechanism with a percent torque split the front and rear axles with the multiple-disc limited-slip differential with a basic torque of 50 Nm adds up to an ideal This basic design high traction since, on the one the dynamic shift in axle toward the rear axle occurs during acceleration is to deliver more drive to the rear. Meanwhile, the multiple-disc center differential can also shift the drive torque 30 to 70 or 70 to 30 percent between the front and axle, whenever the road so dictate. As such, the electronic systems ESP, 4ETS or ASR can as late as possible; the bulk of the is converted into traction on roads.

All interventions go virtually unnoticed, but the are still informed immediately if are driving on the limit. In this a yellow warning light in the instrument panel – a clear to adjust their driving to the road conditions.

The arrangement a permanent design mechanism has key over other systems first need to diagnose a of traction before activating 4×4 all-wheel drive. The on the GLK will have already use of this valuable time to drive torque via the wheels to the

Kamm circle: the laws of sets limits

Just any all-wheel-drive system, 4MATIC in the GLK has to by the laws of physics, a fact illustrated in what is known as the circle”. The fundamental rule is a tyre is only able to a certain level of overall to the road surface. If a large of force is required in a longitudinal for example when accelerating or the lateral forces available are When cornering the reverse In this case a particularly degree of lateral force is for directional stability, whilst the force potential is restricted. designing the drive mechanism and the control systems, engineers’ are called upon to use this in such a way that the very possible handling is ensured in any The frictional coefficient µ the physical grip between the and the road surface. On a dry road figure is high (µ=0,9), and on a road it is low (µ=0,3).

Despite the best efforts, it is ultimately the themselves who determine how safe are on the road. They should adapt their driving in accordance with wintry and ensure that their is suitably equipped; winter are absolutely essential.

Balance of in the “Kamm‘s Circle”

The employees at the Technology Center have a of experience at their fingertips in respect. The first all-wheel-drive was created over 100 years and the engineers also occupy a position where the fine-tuning of control systems is concerned. celebrated its world premiere in in the first generation of the M-Class, work having begun as far as 1993. Mercedes-Benz thus the most extensive experience of all car with these systems.

4ETS: integrated “automatic aid” for ice and snow

When away in wintry conditions the use the off-road algorithms on the GLK 4MATIC to optimum traction. Certain conditions are automatically detected and the of the 4ETS electronic traction system adjusted so that as acceleration as possible can be achieved minimal wheel slip, optimum directional stability in the This strategy also the vehicle to pull away adverse conditions, such as one side of the vehicle is on an icy slope so-called µ‑split) or both on the front or rear axle limited grip (µ-jump).

So starting off on µ-split one side of the GLK is on or ice and the other on asphalt. There are differences in the coefficient of friction the left and right-hand side of the On all vehicles with open differentials the wheel with the coefficient of friction limits the transferable driving power. If the power rises above the transferable power, the wheels on or ice start to spin, and the GLK would not be to start off. This is immediately registered by 4ETS and the wheels are baked by precisely the amount of pressure build-up in the brakes. As the wheel with the coefficient of friction is now supported via the force of the wheel with the coefficient of friction, the GLK starts to Following the start-off process, the characteristics are observed very and the brake pressure controlled in a way that, as far as possible, there is no in speed between the individual The braking force applied by simulates, as it were, a higher of friction on the side with ice or which, in an ideal case, to the coefficient of friction on the asphalt This produces an optimal locking effect on the axle resulting in the maximum possible on µ-split.

Pulling away on different road surfaces

Starting off on “µ-jump”, where one of the axles is entirely on ice or snow and the axle is on asphalt, is made difficult by the large differences in of friction between the front and axle. On vehicles with an longitudinal differential the axle the lower coefficient of friction the transferable driving power. the multiple-disc limited-slip center with its basic locking of 50 Newton meters does a balancing effect, it is unable to out these extreme differences in of friction. In these conditions, both wheels on the axle the lower coefficient of friction to spin if the driving power the maximum transferable driving at this coefficient of friction. helps here by immediately and braking the spinning wheels. enables the axle with the coefficient of friction to be supported by the axle with the lower of friction – and the GLK starts to move.

Pulling away easily on road surfaces (µ-jump)

conditions on wintry roads

On roads covered with and ice, vehicle stability is controlled by means of engine regulation in the acceleration skid system ASR. Taking consideration the longitudinal and lateral of the vehicle continuously determined by the ESP system, the ASR control thresholds are according to the driving situation, as by the aforementioned Kamm circle. In to prevent the vehicle from on winding roads the longitudinal must be controlled via engine regulation in such a way that lateral force is always In order to comply with law of physics, when driving on roads at low frictional coefficient, stability is mainly controlled by of intervention from ESP and the acceleration control system ASR so that a reserve of lateral force is available. Initially, only engine torque is transferred to the wheels to ensure the tyres can sufficient lateral force. If control function cannot directional stability, then ESP the brakes to stabilise the vehicle.

handling characteristics while

In contrast to the control mechanisms when driving on winding considerably more longitudinal can be provided when accelerating in a line, as the tyres hardly to transfer any lateral force. it is important that the tyres can in the optimum µ-slip curve In order to achieve this, in driving situation the control for the engine torque regulation are The multiple-disc limited-slip center simultaneously works on the transfer locking the powertrain longitudinally 50 Nm. This locking factor increases traction, without the control systems. The final ratios therefore allow the 150 Nm to be to the wheels.

In certain wintry it may be necessary to deactivate the control via the “ESPOFF”-switch. This is the case high slip values are at the wheels – for example to get out of deep with or without snow When braking drivers have full support at disposal, even in ESP OFF mode. back on a road surface a normal covering of snow, should then activate the systems again.

Technology in The permanent all-wheel-drive system

The 4MATIC drive system in the GLK is the most powerful all-wheel-drive there is; its control systems new ground. Advantages over systems with a transversely drive unit are achieved to the basic compact, light and design with its longitudinally engine and integrated main and case. Fuel consumption, for is at the same level as that of a conventionally driven vehicle, noise and vibration levels are on a par those in higher vehicle

In cooperation with the dynamic control systems ESP, skid control ASR and 4ETS, the 45:55 percent torque between the front and rear ensures assured and predictable When fine-tuning the control the engineers at the Mercedes-Benz Technology placed particular importance on understeer characteristics, as displayed by all even in the most varied of conditions: on dry roads, in rain, ice or on unsurfaced roads.

A double-disc achieving a basic locking of approximately 50 Nm between the front and axle is fitted to the central The clutch pack is permanently via a plate spring. In the case of wheels on one of the two axles, a friction is transmitted to the axle spinning slowly by relative movement of the A sustained improvement to traction and stability of the vehicle are achieved this principle of variable shift. Particularly in the case of low of friction between the tyres and the surface the traction and stabilising of this so-called pre-lock is clearly noticeable.

Adaptive state-of-the-art brake control enables shortest stopping – even in wintry road

The newly developed ADAPTIVE control system encompasses the basic functions: the anti-lock system ABS, acceleration control ASRand yaw moment ABSand ASR record and control the situation longitudinally, the yaw moment the lateral dynamics. If ADAPTIVE diagnoses critical operating within the limits of the laws of traction and directional stability are or reinstated through precise actuation and drive torque

New additional functions make BRAKE even safer and convenient. Hill Start prevents the vehicle from unintentionally in the opposite direction of wished by the driver. A function as priming has also been If the driver quickly removes his or her from the accelerator, the system for possible panic braking by the brake linings on the brake using little pressure. the indirect pressure build-up operating the brake pedal will then shorten the distance if a full brake does occur. Thanks to BRAKE’s ability to produce the slightest amounts of brake precisely, it is possible to remove the of water which forms on the discs in wet conditions through light brake actuation. reduces even further the response time, and thus the distance, in the wet. Intervention place as soon as the windscreen has reached a certain number of cycles and the driver has not braked of his or her own in the meantime.

The GLKis fitted adaptive brake lights as This system warns traffic that there is a braking situation by initiating of the brake lights if the vehicle’s of deceleration is high. In the case of braking from a speed of 70 km/h the hazard warning are automatically activated when the comes to standstill.

The “off-road” switch in the center helps the GLK-Class to make progress on rough terrain if the line with the “off-road package” is selected. At the touch of a a special drive program into operation; it varies the shift points, “softens” the characteristic and activates the ESP functions off-road ABSand a special 4ETS. A further switch on the DSR (Downhill Speed Regulation) automatically keeps to a pre-selected between 4 and 18 km/h on steep inclines. The driver can vary the at any time using the cruise lever.

In addition to a tyre loss warning system the Electronic Stability Program ESP vehicle/trailer stabilisation as standard. diffuses critical operating through precise brake as they arise. The maximum capacity is 2000 kilograms.

characters: The GLK-Class from

The new GLK is a strong character which the world of compact SUVs. its practical, attractively compact style this distinctive vehicle is in a class above its successfully combining qualities deemed to be conflicting: thanks to the CONTROL suspension, outstanding dynamics go hand in hand superb handling safety and ride comfort. Working with the electronic control the state-of-the-art variable all-wheel-drive 4MATIC unites optimum performance with high suitability. It is precisely these that make the GLK so attractive: the Mercedes-Benz SUV family this is one of the characterised in particular by an impressive spectrum on surfaced roads, and yet at the time that all-important “G” is of its signature.

The four and six-cylinder as powerful as they are economical and compatible, guarantee effortlessly performance. The GLK 220 CDI BlueEFFICIENCY model with the new four-cylinder diesel from Mercedes-Benz. The base mobilises 125 kW/170 hp and consumes 6.7 of diesel per 100 kilometres. The highly body forms the prerequisite for the groundbreaking passive safety, its running and interior comfort with the hallmark Mercedes factor and its high value An excellent level of interior and appointments and attractive equipment help the GLK to stand out from the SUV crowd to an even greater What’s more, systems as the groundbreaking PRE-SAFE safety and the Intelligent Light System ILS are in this market segment for the time.

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