Back to the Future the MercedesBenz 190 D BlueEFFICIENCY AutoWeb News

17 мая 2015 | Author: | No comments yet »
Mercedes-Benz C 250 CDI BlueEFFICIENCY Prime Edition

Back to the Future: the Mercedes-Benz 190 D

Driving enjoyment: almost times the output of a 190 D

Economy: more frugal fuel

Protection: many more and comfort features today

if? Practical implementation of a theoretical

Stuttgart — From the it looks just like a year-old Mercedes 190, of thousands of well-preserved examples of can still be seen on Germany’s

Pressing the accelerator tells a story: equipped with the OM651 common-rail engine 150 kW, the Mercedes 190 D BlueEFFICIENCY shows the potential of this new four-cylinder engine.

With a maximum of 500 Nm between 1600 and 1800 this experimental car has more twice the torque of the most model in the old W 201-series: the famous 190 E Evolution II. This limited-volume touring car racing special, managed 245 Nm.

The idea for this experimental vehicle came during an evening discussion the enormous developments in diesel over the last 20 years. The was: How might one make progress directly tangible, in from the equally profound in the safety and comfort of the car as a whole?

The was a factory-tuned car of a different kind: the 190 D

It accelerates from 0 to 100 km/h in 6.2 It therefore manages this sprint 11.9 seconds than a 190 D of the time, which a sensation on its 1983 introduction its newly developed, fully whisper-diesel.

The differences between the two generations are even more when it comes to fuel despite the significant increase in by 72 hp (OM 601, 1988) to 204 hp (OM651, the new engine in the old body consumes 4.9 per 100 kilometres (NEDC) instead of the 7.3 figure for 1988.

But what is astonishing is that measured to the DIN standard used during the of the 190 D, the Euro-Mix consumption of the current C 250 CDI is a mere 4.6 litres per 100 kilometres, and 5.1 per 100 kilometres according to the present method. This represents an of around 30 percent — not to the exhaust emission levels.

The field is by no means level: a 190 D is 385 kilograms lighter than a C 250 CDI BlueEFFICIENCY, for example. In addition to interior space — the C-Class model is 16 centimetres and around nine centimetres and higher than a 190 — is due to the high standard of comfort and features.

The Mercedes model 190 was of its time in terms of safety Nonetheless, customers at the time nothing like the extensive of passive and active safety to be found as standard in the current C 250 CDI These include seven the adaptive AGILITY CONTROL and numerous assistance systems as ESP® and ADAPTIVE BRAKE. features like the ergonomically multi-adjustable seats or electrically and heated exterior mirrors contribute to the higher weight.

A number of factors are responsible for the efficiency of the current C-Class. is one of them: with a Cd figure of the 190 set an example for its time. The new C-Class this figure by far, and is once again the trendsetter in segment with a Cd figure of

The progress is equally impressive the powertrain is concerned: while the 190 D was with a four- or optionally five speed manual the C 250 CDI has a six-speed manual gearbox Plus, it employs a large of friction-reducing measures. The radiator power steering and generator operate much more than 20 years ago.

work: Generations in conflict

: the base vehicle was a 190 E 2.6 Sportline in 1992

Borrowed: sump the Sprinter, differential from the

Tricked: electronics fool the into thinking it is in a test

No, I can’t say it was a real bargain, Peter Lehmann, reflecting on his of the 190 E 2.6 which provided the basis for the conversion.

After all, the W 201 has since gained collector and this example dating 1992 was in particularly good

Lehmann knows a thing or two the 190-series: as a Mercedes-Benz engineer for the design and realisation of show and concept cars, and as the team for the conversion work, he privately no less than three ranging from the entry-level with its frugal 1.8-litre to the potent Evo model.

The small that installed a new diesel unit into the old 190 body the space of a year also two other, equally staunch of this model series. And were not alone in their Almost every time the 190 was in our workshop overnight, there was a attached to it next morning if it was for sale, says Lehmann.

But it was and it has meanwhile become a priceless example.

Packaging: what fit is made to fit

The 190 E 2.6 selected for the conversion was a good choice: its six-cylinder unit weighs around the as the modern OM651, maintaining the balance between the front and axles.

Moreover, the braking of this former 160 hp model was robust enough to keep many more, modern horsepower in check. As a Sportline this 190 also possessed a taut suspension setup could be left unchanged.

The usual day-to-day occupation of the team was to look well the automotive future with cars. This time, it was a matter of resolving the past.

The challenge was that no CAD data for the 190. As used to be the practice, of the engine compartment and engine therefore transferred to see-through then superimposed. As everything to fit reasonably well, the body were accurately measured. The figures were reconciled the engine data to identify any collision points.

And packaging there certainly were. The would have passed through the sump, for example. A was found by consulting colleagues in the vehicle sector: the sump of the Sprinter was a good fit. The is incidentally a distant relative, for the van is available with the modern four-cylinder common-rail diesel

The adaptation work, however, did not end The transmission tunnel of the 190 had to be widened to the current six-speed transmission, and in the of the rear axle differential the had recourse to the replacement parts the differential of the 3.2-litre W 203 (that is, the to the current C-Class) proved

Electronics: if it does not exist, it is

The greatest challenge during project was not in fact the hardware, but the electronics, says Peter

This because the 190 did not yet have a as a data transfer system. In the C-Class with its state- OM 651 engine, more than one control units are in constant with each other to their respective tasks. The car not start without the right as the electronic ignition lock as a link between the engine and the interior CAN-bus.

So the team the 190 D BlueEFFICIENCY came up with a idea: they fooled the into thinking it was on a test The appropriate signals are sent by a box of roughly the size of two shoe-boxes in the This is what enabled the to spring to life, and it performs its with the usual quietness and under the bonnet of the W 201.

But the problem was not long in coming: for the car to as it should, the electronics required ABS Turning wheels cannot be even on a virtual test however, so once again the specialists were called for and now the ABS signals are likewise simulated.

The experience is really unique, enthuses.

The modern diesel is easily to cope with the 190. level of muscular torque was unimaginable at the time, likewise the low fuel consumption.

There other things beyond the dreams of the engineers developing the W 201 at the end of the for example the digital speedometer or ABS.

With its uncluttered the 190 appears timeless and drives well indeed. Nonetheless the progress made in automobile over the last three was our constant companion during the work, Lehmann concludes.

The new diesel engine generation: the way in terms of power output, and emissions

Two-stage turbocharging for power output and spontaneous

Fourth-generation common-rail technology

innovations reduce consumption and

The basic character of the new four-cylinder generation from Mercedes-Benz can be in just a few superlatives: greater greater economy, and greater

The new power unit from the plant needs to be explained at length to be fully appreciated. It does charter territory which diesel engines and particularly four-cylinder units have previously been It redefines standards for power and torque on the one hand and for fuel and exhaust emissions on the other, benchmark figures which no comparable series-production engine is to match at the current time.

The advances which the design at Mercedes-Benz have achieved this new four-cylinder diesel are not evident on paper; its effects can be experienced to an intense degree the wheel. As far as the figures are concerned, the powerful variant of the new diesel extracts 150 kW from its displacement of cubic centimetres. The power-to-displacement and ratios of the new engine are just as with figures of 70 kW and 233.3 Nm per respectively.

Lower fuel despite substantial gain in

The engineers also took to ensure that the new diesel is a paragon of fuel efficiency. the substantial power boost of 25 kW, the makes even more use of diesel than its predecessor, was itself a most modest of fuel. This is immediately from the fuel consumption for the new C 250 CDI BlueEFFICIENCY. When fitted in the the new 150-kW unit burns 5.1 litres of diesel per 100 kilometres 0.8 litres less than The Mercedes-Benz engineers have succeeded in further reducing the engine emissions. The new four-cylinder already meets the future EU5 standard.

Innovative technologies parallel

The exemplary figures by the new engine for output and torque economy, exhaust emissions and are the result of a whole raft of technologies. The principal features of the new diesel engine:

Two-stage turbocharging ensures power output and optimum


Fourth-generation common-rail with a rail pressure has been increased by 400 bar to 2000 plus a new piezoelectric injector featuring direct injector control creates the ideal for more flexible injection leading to smoother engine lower fuel consumption and emissions;

The maximum ignition of 200 bar also contributes to the high ratio;

Both the oil-spray and the water pump are activated in with requirements to save and therefore fuel. The oil pump’s design additionally reduces the oil rate — and therefore consumption;

The camshaft drive is at the rear in order to enhance

refinement and satisfy the exacting protection requirements;

The engine is made of cast iron, the head of aluminium;

Mercedes-Benz C 250 CDI BlueEFFICIENCY Prime Edition

A two-part jacket in the cylinder head maximum cooling in the area of the chamber plate; it is this enables an ignition pressure of 200 bar and a high power-to-displacement ratio;

The cylinder barrels have more finely honed in the preceding model, helping to consumption;

To compensate for the second-order which are inherent to four-cylinder engines there are two Lanchester shafts at the bottom of the engine running in low-friction roller rather than conventional bearings;

The two-mass flywheel has specifically designed for high torque at low engine speeds in to isolate the crankshaft’s vibration thereby contributing to the engine’s smoothness.

Diesel engines in passenger cars: From the first diesel car to the C 250 CDI BlueEFFICIENCY

The engine has been regarded as the of durability for many decades: and reliable of course, but also with a touch of sluggishness. progress was the term used to this lack of dynamism in from the 1970s.

Over this characteristic has completely making way for a totally new image. agility, ride comfort, pleasure and, not least, compatibility are attributes to which diesel engines can nowadays lay Engineers at Mercedes-Benz have actively contributing to this for more than 70 years:

A new generation of four-cylinder diesel celebrated its debut in the C 250 CDI BlueEFFICIENCY. two-stage turbocharging and fourth-generation technology with a rail of 2000 bar, as well as a new injector design with nozzle needle control.

history of the C-Class: Innovation as a

Particularly quiet whisper (W 201)

Four-valve technology and (W 202)

Extremely economical (W 204)

27 years ago, with the 190, Mercedes-Benz laid the for what is now its best-selling model the C-Class. To date, a total of 6.6 million C-Class Saloons, and Sports Coupés have delivered to customers globally.

the 190 was developed, the engineers were subject to strict target that are still valid They had to reconcile consumption-related such as low weight and good with the high Mercedes governing occupant safety, stability, comfort and quality.

in diesel technology in particular always had a decisive influence on the story of the 190 and the C-Class. An overview of the history:

Refreshingly unconventional: the 190 (1982 1993)

When presented the model 190 in 1982, it was nicknamed the Baby-Benz. The Saloon (W was the first in a new model series below the E-, S- and SL-Class models, and in-house as the compact class. The responsible for its straight lines and wedge-shape with subtle edges was Bruno Sacco.

A unconventional, modern car which can be to capture the enthusiasm of new and especially buyers, Neue Züricher wrote on 22 December 1982.

The car transferred other Mercedes such as a passion for technical to the mid-series. Accordingly the W 201 was given a independent rear suspension, a construction using high-strength an aerodynamically exemplary bodyshell and passive safety features.

The also set new standards where the were concerned: in the diesel with an encapsulated unit soon earned itself the whisper-diesel in the model 190 D (from This completely newly four-cylinder diesel engine a displacement of 1997cc was half as as comparable drive units. In with the then respectable of 53 kW and good fuel economy, made the new diesel an all-round, success.

New name: the first (1993 2000)

The 202-series was the to bear the name C-Class. The (W 202) was launched in 1993. The followed the tradition of the 190, but more interior space and with similar exterior At comparable prices, the standard were also much extensive. In 1996 the range was with the Estate (S 202), offered exemplary spaciousness for vehicle class.

The 202-series had a effect on the further development of car engines at Mercedes-Benz: it was in the C-Class four-valve diesels for passenger first celebrated their premiere. This was followed by the turbodiesel car with four-valve and intercooling.

In 1997 the diesel with common-rail direct (CDI) celebrated its debut in the Its forte is refinement, the motoring mot said of the Mercedes-Benz C 220 CDI in January Common-rail separates the injection the pressure stage, and the pre-injection possible as a result compensates the delay which spells the end of direct injection.

Three body variants: the C-Class (2000 2007)

In 2000, the second-generation C-Class out at the world through dynamically twin headlamps. Its attractive provided a platform for a whole of technical innovations. This characterised both the Saloon and the Estate presented in 2001, as as the new Sports Coupé added to the family in the European Autumn of

Standard equipment included technical innovations that had only been available in the top models: windowbags, adaptive for the driver and front passenger, Assist, a multifunction steering a central display and optical are just a few examples. The technical that made their in this generation of the C-Class the automated SEQUENTRONIC six-speed

More individuality: the third (since 2007)

Safety, and agility were the outstanding of the current C-Class launched in on 31 March 2007 (Australia 2007). This is the first saloon in which the design and lines have their distinctive front ends.

In to the driving refinement typical of a all model variants feature the technical highlights. These for example, the AGILITY CONTROL package with situation-related control, the Intelligent Light with five different functions and the PRE-SAFE® preventive protection system.

From 2008 a completely newly generation of diesel engines became available for the Saloon (W and the Estate (S 204), which in September 2007. These 4th-generation common-rail technology a rail pressure of 2000 as well as a new piezo-electric injection with direct nozzle control for more flexible timing, and therefore smoother The first model was the C 250 CDI BlueEFFICIENCY Edition, which developed 150 kW and a of 500 Nm from a displacement of 2.2 litres. its outstanding performance, the Prime of this model consumes an of only 5.2 litres of fuel per 100 kilometres (CO 2 emissions: 138 g/km). model is currently not sold in

Mercedes-Benz C 250 CDI BlueEFFICIENCY Prime Edition
Mercedes-Benz C 250 CDI BlueEFFICIENCY Prime Edition

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