Engine Details of Mercedes CL 65 AMG
by: Guest
Total views: 75
Word Count: 880
The outstanding qualities of
the AMG V12 engine have won for it awards like the “International Engine of the
Year Awards” in the “Best Performance Engine” category in the year 2004. The
450-kW/612 hp AMG power unit was proclaimed winner beating over 70 other
competitors from US,
In the manufacturing facility for
the AMG engine the philosophy is “One man, one engine” which means that each
AMG 12 engine is hand-assembled from start to finish by a single engineer
following the strict quality standards impose by the Mercedes-Benz. The “one
man, one engine” philosophy is documented by the engineer’s signature found on
the AMG engine plate.
The twelve-cylinder biturbo
engine found in the CL65 AMG features the latest technology from the world of
motorsport. The highly flexible components and materials assured the continuous
influx of power and torque even when operating at extreme temperatures. These
components include high precision-balanced crankshaft that is created out from
high strength materials; forged pistons made from special materials that are
extremely resistant from pressure and temperature; and a more effective
oil-spray cooling system with a distinct nozzle for each piston, plus some
larger piston pins.
The major and big-end bearings
are also made from high quality materials to counteract the pressure and the
temperature more effectively. The charge cycle in the cylinder heads gets some
advantage out from the optimized combustion chambers as well as on the extended
opening times of the intake valves. Moreover, a modified oil pump makes sure
that all the parts that need lubrication are supplied with oil even under
extreme conditions. To further boost the performance of the AMG engine an
engine oil cooler is also added in the front apron with the addition of an
extra engine coolant radiator located in the wheel arch.
Redesigned charge-air cooler…
The charge-air cooler has also
been modified with a low temperature radiator positioned in the front of the
vehicle which was made almost 70 percent larger. The system functions on the
precept of an air-to-water heat exchanger for an effective cooling of the
intake air which are compressed by the turbochargers before they are made to
enter the combustion chambers.
The extra surface area added
for the low temperature radiator results in a 25 percent reduction in the
intake temperature at full throttle and assures high power and torque output in
any operating conditions regardless of the temperature outside.
The casing or the frame of the
compressor and the turbine in both turbochargers together with the turbine and
compressor wheels has been enlarged producing a maximum charge pressure of 1.5
bar.
The electronically controlled
fuel supply with its new developed components functioned with a variable system
pressure between 3.6 and 5.0 bar. The fuel pressure is also regulated
intermittently in accordance to the required power and the temperature outside.
The engine management system interprets the command from the accelerator and
makes the necessary action.
AMG sports an especially designed Mercedes exhaust system…
The powerful sound of the AMG
twelve-cylinder is guaranteed by the AMG sports exhaust system with two trim
chromed tailpipes in the exclusive AMG V12 design. Similarly catalytic converters
that has tri-metallic coating can provide a faster response from a cold start
and offer an efficient exhaust-gas after treatment and an extensive service
life. The CL 65 AMG also complies with the EU4 emissions standard as well as
the emission requirements for the
Here are the major data for the
CL65 AMG
- Cylinder configuration/valves
per cylinder – V12/3
- Displacement cc – 5980
- Bore x stroke mm - 82.6 x
93.0
- Compression ratio - 9.0 : 1
- Output kW/hp at rpm –
450/612;4800-5100
- Max. torque Nm at rpm - 1000
2000-4000
- Acceleration 0-100 km/h s -
4.4
- Top speed km/h - 250
The AMG Speedshift 5-speed automatic transmission and steering-wheel
gearshift paddles
The driving power of the new
CL65 AMG is distributed to the wheels by the AMG Speedshift 5-speed automatic
transmission with AMG gearshift paddles and DIRECT SELECT gearshift. There is
also an S/C/M button found on the centre console that enables drivers to choose
the driving modes that they want like Manual, Comfort, and Sport driving.
The driving modes will also
change the transmission characteristics and in turn alter the accelerator
response and the spring/damper settings of the AMG sports suspension basing on
the Active Body Control. The gears may also be shifted manually at any time by
using the silver-colored aluminum shift paddles on the ergonomically designed
sports steering wheel.
The AMG V12 delivers a potent
torque of 1000 Nm calls for a powertrain that has been systematically
reinforced. For the automatic transmission this will include newly developed
clutch plates coated with high quality metallic plus the modified shift and
torque converter lock-up logic. These are supplemented with the redesigned
shafts, larger hub carriers and made even more durable steel spring links.
About the Author
Dwyane Thomas is a part time cook and full-time auto-enthusiast. This 31-year old Civil and Environmental graduate is a consultant at one of the engineering firms in Pennsylvania.
Rating: Not yet rated