Mercedes-Benz M278 engine – Mashpedia, the Video Encyclopedia

22 Nov 2014 | Author: | Comments Off on Mercedes-Benz M278 engine – Mashpedia, the Video Encyclopedia
Mercedes ML 230

Mercedes-Benz M278 engine

The M278 is derived from the previous M273 V8 engine, its bore pitch. aluminum block, and Silitec aluminum/silicon cylinder liners. [ 2 ] In contrast to the M273, the M278 features direct injection. with actuated fuel injectors for precise fuel delivery, and ignition, which enables the plugs to be fired multiple over the combustion sequence for efficient combustion. [ 2 ] Other relative to the M273 include an adjustment range for the variable timing system, a new timing arrangement, and new engine accessories as the oil pump, water pump, pump, and alternator) which parasitic loads. Many of new features are shared with the V6 engine family. which was at the same time. [ 2 ]

While the M273 was naturally the M278 features twin one per cylinder bank, producing 0.9 bar pressure in most configurations. [ 2 ]

estimate that these in conjunction with vehicle such as a stop-start system. the 4.6 liter M278 to have 22% fuel consumption and CO2 emissions the 5.5 liter M273 while more power (429#160;hp 382#160;hp) and torque (516#160;ftВ·lbf 391#160;ftВ·lbf). [ 2 ] The M278 is also refined than its predecessor. [ 3 ]

The M278 lineup avoids the States Gas Guzzler Tax. a for V8 production engines from [ 4 ]

Contents

Specifications [ edit ]

versions of the M278 engine are in or have been announced.

(base) [ edit ]

The basic has a displacement of 4.6 liters (4663 cc) a bore of 92.9#160;mm and … of Output is 429#160;hp (320#160;kW, 435 PS) at with 516#160;ftВ·lbf (700#160;NВ·m) of at 1800-3500#160;rpm for S-Class, CL-Class, and GL-Class models. [ 2 ] CLS-Class, and M-Class models are derated to (300#160;kW) with 443#160;ftВ·lbf NВ·m) of torque at 1600 [ 5 ] Although it no longer corresponds the engine displacement, all of the above are still badged as 550. The besides the GL550 above, features the GL450 trim carries a detuned version of the 4.6 L making 362 horsepower and 406 pounds-feet of [ 6 ]

For 2014 S-Class models code W222), power is to 455#160;hp (335#160;kW) at 5250#160;rpm, torque remains at 516#160;ftВ·lbf between 1800-3500#160;rpm. [ 7 ]

These are mated to the 7G-Tronic 7-speed transmission.

Applications: [ 2 ]

Mercedes ML 230

M157 [ ]

The second variant, designated . [ 9 ] is tuned by Mercedes-AMG for use in higher-performance This version has a displacement of 5.5 (5461 cc) with a bore of and … of 90.5#160;mm. [ 10 ] Increased and torque comes from the displacement as well as higher pressure of 1.0 bar.

There are six states of output the M157. For the S-Class and CL-Class, is 536#160;hp (400#160;kW, 544 PS) at 5500#160;rpm 590#160;ftВ·lbf (800#160;NВ·m) of torque at or 563#160;hp (420#160;kW, 571 PS) at 5500#160;rpm 664#160;ftВ·lbf (900#160;NВ·m) of torque at with the optional AMG Performance [ 10 ] For the 2012-2013 E-Class and CLS-Class, is 525#160;hp (386#160;kW) with (700 NВ·m) of torque in tune, or 557#160;hp (410#160;kW) 590#160;ftВ·lbf (800 NВ·m) of with the AMG Performance Package. [ 11 ] with the 2014 E-Class and power increases to 557#160;hp with 531#160;ftВ·lbf (720#160;NВ·m) of for standard tune, or 585#160;hp with 590#160;ftВ·lbf (800#160;NВ·m) of for S-Model variants. [ 12 ] [ 13 ]

These engines are mated to the AMG MCT 7-speed semi-automatic transmission. replaces the 7G-Tronic’s torque with a wet clutch pack. [ 14 ] that this MCT 7-speed can considerably more torque and is not the unit as the dual-clutch transmission on the Mercedes-Benz SLS AMG. [ 15 ]

Applications: [ 9 ]

The M157 engine replace the previous M156 in of the AMG lineup. Despite the 5.5 liter all models are designated 63 for marketing [ 16 ]

M152 [ edit ]

The third designated M152 . is a naturally derivative of the M157 engine, the same displacement, direct and many other features. The engine includes a cylinder variable displacement system for fuel economy [ 17 ] (up to 30 percent than the M113 E55 engine in the previous model). Output is at 6800#160;rpm, with 398#160;ftВ·lbf of at 4500#160;rpm. [ 18 ]

Mercedes ML 230
Mercedes ML 230
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