A-Class (W176) Mercedes-Benz undercuts limits planned for 2017: A-Class petrol engines meet EURO 6 standard

Giannis · Jul 13, 2012

Stuttgart - A good two years before the new EURO 6 European emissions standard is due to come into effect for all petrol-engined vehicles on 1.9.2014, the petrol engines of the new Mercedes-Benz A and B-Class have been confirmed as already meeting the required emission limits. More specifically, the engines also already undercut the particulate limits which are being introduced for the first time for petrol engines. Recoding of models which have already been delivered will also be possible.

"With this advance compliance, Mercedes-Benz is once again highlighting its pioneering role when it comes to the environmental acceptability of its vehicles", explains Dr. Thomas Weber, Board Member responsible for Group Research and Development for Mercedes-Benz Cars. "With our diesel vehicles too, since as early as 2009 we have had an increasing number of models on the market which already meet the EURO 6 diesel requirements which will apply from 2014." Mercedes-Benz also played a pioneering role in the automotive industry by reducing nitrogen oxide in the exhaust emissions of diesel passenger cars and trucks with the introduction of BlueTEC technology.

Thanks to advanced Mercedes-Benz technology, the direct-injection petrol engines in the A 180, A 200 and A 250, as well as in the corresponding models in the B-Class, have succeeded in undercutting the new standard since start of production, and as such even undercut the extremely strict particle number limit of 6 x 1011 per km, which will not become compulsory until the second stage of EURO 6 from 2017. For vehicles produced from August 2012 (B-Class: September), this will be documented in the vehicle documentation (COC/Certificate of Conformity). Vehicles produced earlier can be appropriately recoded. Customers will be contacted so that they can obtain a new COC document along with manufacturer confirmation from their Mercedes-Benz service partner.

On 29 May 2012, the European Commission published Directive 459/2012, establishing the EURO 6 emission regulations for vehicles with petrol engines from 2014 for Stage 1, and from 2017 for Stage 2. The new specification stipulates that in the future, petrol models will also have to meet the strict particulate limits of 6 x 1011 particles per kilometre.

Source: [Mercedes-Benz]

View the Post on the Blog

Wolfgang · Sep 9, 2012

The A-Class uses third generation spray guided direct injection from the S-Class, which was first introduced in 2010. Pic:

http://www.worldcarfans.com/1100507...s-46-liter-v8-biturbo-and-35-liter/highphotos

Wolfgang · Oct 29, 2012

C 180 BlueEFFICIENCY premiers with 1.6 liter inline four cylinder turbo M274 DE 16 AL.

The turbocharged 1.6-litre four-cylinder petrol unit, M274 DE 16 AL, is the brand new entry-level engine for the C-Class. With fuel consumption of 5.8 l/100 km and a CO2 figure of 136 g/km, the improvement compared to the previous C 180 when similarly equipped is as much as 21 g/km, or just under 1 l/100 km. This makes the C 180 BlueEFFICIENCY one of the very first petrol models to be ranked in energy efficiency class B. The 115 kW (156 hp) engine is very light when compared to its competitors and delivers impressive agility from standstill – peak torque of 250 Nm is on tap from just 1250 rpm all the way up to 4000 rpm (fuel consumption, combined cycle: 5.3 - 4.8 l/100km, CO2 emissions, combined 139 - 125 g/km, energy efficiency class: A)*.

http://www.daimler.com/dccom/0-5-1466472-1-1466844-1-0-0-1466827-0-0-135-0-0-0-0-0-0-0-0.html

Wolfgang · Oct 29, 2012

New B premiers the 1.6 liter inline four cylinder turbo M270 DE 16 AL.

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. The new car premieres the M270 gasoline engines with displacements of 1.6 and 2.0 litres, the OM651/D18 diesel unit in two output ranges, the all new 7G-DCT automatic double-clutch gearbox and the F-SG 310 6-gear manual transmission.

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 petrol engines: high tech in the compact class

Direct injection with fast-acting piezo injectors for multiple injection, controlled oil pump, switchable water pump, high compression (10.3:1) despite turbocharging, fast and convenient start/stop system – the technical details of the new generation of four-cylinder petrol engines read like a catalogue illustrating the fine art of high tech engine construction.

With regard to the combustion process, the new all-aluminium engines with two overhead, chain-driven camshafts are closely related to the BlueDIRECT V-engines which were originally introduced in the S-Class in mid-2010 and have since been setting new benchmarks worldwide in terms of performance and fuel consumption under everyday conditions in the luxury and top-range models from Mercedes-Benz. Direct petrol injection with spray-guided combustion, which Mercedes-Benz was the first car manufacturer to introduce in series production, has been developed further by the engineers into third-generation direct petrol injection with spray-guided combustion. The system pressure is up to 200 bar and is variably optimised according to the engine's characteristic map. Completely newly developed piezo-electric injectors allow up to five injections per power stroke for the best possible mixture formation, while multi-spark ignition helps to ensure reliable combustion of the mixture.

The end result is excellent fuel efficiency combined with minimal emissions and agile response. The new four-cylinder engine in the B-Class supplies its maximum torque right from an engine speed of 1250 rpm, for example, maintaining this maximum level up to 4000 rpm. In conjunction with the new 7G-DCT transmission, whose control system communicates with the engine control unit, the new four-cylinder engine responds highly spontaneously to movements of the accelerator pedal, while during cruising higher gearing can be selected, thereby further reducing fuel consumption and noise.

The turbo engines also retain their exemplary fuel efficiency at high load levels, as the mixture does not require enriching to cool the cylinder head up to a speed of 200 km/h (full-load enrichment). A two-piece water jacket with optimum cross-flow cooling and fine cooling ducts measuring only three millimetres between spark plugs and injectors convey the cooling fluid to the critical points. A new thermal management system has also been developed: in cold state, a switchable water pump with flow-optimised ball valve ensures that no coolant flows through the engine, providing for swift heating-up of the combustion chambers after starting up the engine. The thermostat is electronically controlled and the coolant temperatures are adjusted according to driving style and ambient conditions. The thermostat itself is also a flow-optimised ball valve. In the interest of high efficiency, the volumetric flow of the oil pump is also controlled, as in the V-engines.

The new four-cylinder generation features cylinder spacing of 90 millimetres and is highly compact in design, thanks to the expedient arrangement of the power take-off units. The variant to be unveiled at the premiere with a displacement of 1.6 litres features a short stroke of 73.7 mm with a bore of 83.0 mm. The hollow crankshaft is a further factor contributing to the low weight of 137 kg.

Overview of technical data for the B-Class with petrol engine: