This bodes well for the availability of Dissel engines as time goes
by. Article and link borrowed from MBCA Hawaii section. I found
particularly interesting the the OM651 Diesel is the "most produced"
engine in MB History. They are claiming 60 MPG, so after 30 some
years we finally have an engine that outperforms the fuel economy of
the VW and escort diesels of the early 80s.
This engine in a van would be very interesting to me.
Curly (Diesel luddite)
Mercedes-Benz continues to drip feed details of its upcoming E-Class
ahead of the vehicle's launch in the Northern Hemisphere spring.
Having already revealed some of the car's semi-autonomous features
and interior design, Mercedes has announced it will premiere a new
four-cylinder diesel engine in the new E-Class E 220 d, marking the
launch of a family of all-aluminum four cylinder engines that will
proliferate throughout Mercedes' lineup of cars and vans in various
outputs and in both longitudinal and transverse configurations.
The compact dimensions of the new engine allows more flexibility in
adaptation to various uses and ... An offset crankshaft is integral
to the higher efficiency and lower vibration in the E-Class engine
The all-aluminum architecture of the E 220 d engine lightens weight
considerably The dual cams are closely mated to compact the engine as
much as possible
Mercedes believes that internal combustion engines have a future
alongside hybrid and electric powertrains in the move towards more
sustainable mobility, and that cleaner, more economical diesel
engines are a key part of this vision. To this end, the new OM 654
engine that will premiere as the E 220 d in the new E-Class delivers
NEDC combined consumption of just 3.9 l/100km (60 mpg) and CO2
emissions of 102 g/km,, which is a cut of around 13 percent compared
to its predecessor, the OM 651. This is managed while boosting power
output to 143 kW (192 hp) from 125 kW (168 hp).
This is significant as the outgoing OM 651 is the most-produced
engine in Mercedes-Benz' history. The new engine will therefore find
a new home in all of the vehicles in which the OM 651 currently
resides, including the A-Class, S-Class, and V-Class vehicle models
as well as the high-selling Sprinter van.
The E 220 d also displaces 47.5 fewer cubic centimeters per cylinder
than its predecessor, has a smaller bore and shorter stroke, and
produces more horsepower (195 hp vs 170 hp) with the same torque (400
Nm, 295 lb-ft). The new engine's compression ratio is slightly lower
(1:15.5 vs 1:16.2) and it is lighter (168 kg vs 199 kg/370 lb vs 439
lb), all while meeting Euro 6 emissions standards.
The objective, Mercedes-Benz says, was to design an engine that is
both superior in efficiency and that could give wide variance without
heavy modification. The compact dimensions of the new engine allows
more flexibility in adaptation to various uses and its design has
exhaust after-treatment integrated into the engine itself rather than
separate on the chassis, making the design more flexible.
This will be the first all-aluminum four-cylinder diesel engine from
Mercedes-Benz and the company says it has lower noise levels and
better NVH (noise-vibration-harshness) than its predecessor.
Efficiencies were further added thanks to the next-generation in
common rail injection (pressures up to 2050 bar) and a 25 percent
reduction in internal friction loss, largely due to Nanoslide coating
of the cylinders and an offset crank assembly. The difference in heat
expansion between the steel pistons and aluminum crankcase was used
to reduce friction in the engine.
The final gain with the new engine lies in its reduced complexity in
manufacture and variance. With a modular, compact design, the engines
can be easily configured to meet any of the over 1,000 country- and
region-specific technical and emissions requirements without
reengineering the entire engine or major components of it.
Mercedes-Benz will begin producing the new engine in the second
quarter of 2016 and it will begin appearing in vehicles later in the
year as its predecessor is phased out.
Source: Mercedes-Benz
http://www.gizmag.com/mercedes-benz-e-class-diesel-engine/41915/
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