Mercedes-Benz M 273
| Mercedes-Benz / AMG | |
|---|---|
|
|
| M 273 | |
| Manufacturer: | Mercedes-Benz / AMG |
| Production period: | since 2005 |
| Design: | V , eight-cylinder |
| Engines: | 4.7 liters (4663 cm³) 5.5 liters (5461 cm³) |
| Previous model: | M 113 |
| Successor: | M 278 |
| Similar models: | M 272 |
The Mercedes-Benz M 273 engine is a gasoline engine with eight cylinders in a V arrangement .
General
The M 273 is the further development of the M 113 . He took over the cylinder spacing and arrangement from him. It is technically related to the V6-cylinder M 272 gasoline engine , which was created in the same development cycle. The engines mainly share the angle between the two cylinder banks and the distance between the individual cylinders.
The M 273 made its debut in the S-Class in September 2005 . The engine has since been used in the E-Class and CLS , in the S and R-Class , also in the CL , SL and CLK , as well as the ML , GL and G off-road vehicles .
Basic technical data
- Liquid-cooled V8 four-stroke petrol engine, 90 ° cylinder bank angle
- Cylinder distance: 106 mm
- Aluminum - engine block with cast-in cylinder liners made of Silitec (an Al - Si - alloy )
- five main bearings, forged steel - crankshaft , induction hardened connecting rod - and main bearings
- Forged crack connecting rods made of 70MnVS4
- Aluminum crankcase with reinforced bearing caps and compact spray bushings (weight 33 kg)
- Aluminum cylinder heads each with two overhead camshafts ( DOHC ), phase adjusters and central spark plug
- Independent camshaft adjustment (designed as a vane adjuster ) for the inlet and outlet side
- Both intake camshafts are driven by an 8 mm duplex sleeve chain , the exhaust camshaft is driven by gears through the intake camshaft
- four valves per cylinder
- Tumble flaps in the inlet channels
- Compression ratio: 10.7: 1
- oval HFM (hot film air mass meter , 15% less pressure loss than its predecessor)
- variably adjustable, variable intake manifold ( intake manifold ) of aluminum - magnesium - alloy
- electrically heated 3-plate thermostat (thermal management with map control)
- Secondary air injection
- Bosch ME9 engine control unit with two microcontrollers (56 MHz, 2 MB flash memory)
- eight individual ignition coils with a pressed iron powder core and integrated driver electronics arranged directly above the spark plug
- 90% of the maximum torque is available between 2000 and 5600 rpm
- Weight according to DIN 70020a: 187 kg
Expansion stages
M 273 KE 46 *
| Sales description | model series | Construction period |
|---|---|---|
| Displacement: 4663 cm³, output: 250 kW (340 hp) at 6000 rpm, torque: 460 Nm at 2700-5000 rpm | ||
| GL 450 | X 164 | 2006–2012 |
| S 450 | W / V 221 | 2006-2010 |
M 273 KE 55 *
| Sales description | model series | Construction period |
|---|---|---|
| Displacement: 5461 cm³, output: 285 kW (388 hp) at 6000 rpm, torque: 530 Nm at 2800-4800 rpm | ||
| ML 500 | W 164 | 2007-2011 |
| GL 500 | X 164 | 2006–2012 |
| E 500 (coupé, convertible) | C / A 207 | 2009-2011 |
| CLK 500 | C / A 209 | 2006-2010 |
| E 500 (sedan, station wagon) | W / S 211 | 2006-2009 |
| E 500 (sedan, station wagon) | W / S 212 | 2009-2011 |
| CL 500 | C 216 | 2006-2010 |
| CLS 500 | C 219 | 2006-2010 |
| S 500 | W / V 221 | 2005-2011 |
| SL 500 | R 230 | 2006-2011 |
| R 500 | W / V 251 | 2007-2014 |
| G 500 | W 463 | 2008-2015 |
* Engine designation is encoded as follows: M = engine (Otto), series = 3 digits, KE = port injection, displacement = deciliters (rounded)
Problems
Basically, this engine is considered extremely reliable.
At the same time, early models (up to around September 2006) had problems with a deflection gear in the chain drive of the timing chain . Up until this point in time, Mercedes-Benz was using improperly hardened material. As a result, the entire chain drive on affected vehicles had to be replaced on a regular basis. According to Mercedes-Benz, a modified spur gear was installed from engine number 088611.
The variable intake manifold also caused problems. The plastic flaps used in it, which are intended to vary the length of the suction path, can coke over time and, in extreme cases, break off.
successor
The successor from 2010 was the M 278 engine .
performance increase
In addition to a pure electronics optimization , the result of which most suppliers state with 316 kW (430 PS) and which led to a significant improvement in acceleration to 200 km / h in various test reports (up to approx. 3 s shorter acceleration times), more complex conversions are also included other camshafts and valve springs available (approx. 460 hp).
There are also manifolds available, but they may not be operated within the scope of the Road Traffic Licensing Regulations . Their installation leads to the expiry of the operating license for the vehicle in question. In addition, a deterioration in the exhaust gas behavior of the engine caused by the installation can lead to the fulfillment of a tax offense.
Web links
Individual evidence
- ↑ MTZ 12/2005, pp. 932-940
- ^ Car picture from August 4, 2011
- ^ WAZ of July 3, 2011
- ↑ Mercedes Tuner 03-04 / 2007, pp. 96-99
- ↑ Autobild Sportscars 03/2006, pp. 34–36
- ↑ http://www.mkb-power.de/de/produkte.php?fahrzeug_id=13&prod_gruppe=11