“Mercedes-Benz OM457 engine”的意思、由来-开放百科全书

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Mercedes-Benz OM457 engine

释义

References
Bibliography

{{Infobox automobile engine
| name = Mercedes-Benz OM 457
| image = Mercedes-Benz_OM_457_hLA.jpg
| manufacturer = Mercedes-Benz
| aka =
| production = since 2003
| predecessor = OM 447
| successor = OM 460
| configuration = Inline 6
| displacement = {{convert|11967|cc|cuin|0|abbr=on}}
| bore = 128
| stroke = 155
| block = cast iron
| head = cast iron
| valvetrain = OHV
| compression = 18,5:1
| supercharger =
| turbocharger = 1 × BorgWarner, no VTG
| fuelsystem = Unit injecotors
| management =
| fueltype = Diesel fuel 51 CZ, DIN EN 590 or EN 14214^[1]
| oilsystem =
| coolingsystem = water-cooled
| power = 185 – 335 kW
| specpower =
| torque = 1,1 – 2,1 kN·m
| length = 1316 mm^[1]
| width = 746 mm^[1]
| height = 1019 mm^[1]
| diameter =
| weight = 1045 kg^[1]
| emissions level = Euro V or IMO IV
| emissions control = Diesel exhaust fluid
}}

The Mercedes Benz OM457 Engine is an 11967 cc displacement inline 6-cylinder 4-stroke Diesel engine. It is one of many motors in the 400 series of engines.

The OM457 has many applications, including Truck, marine, military, municipal, and agricultural vehicles, as well as stationary settings. The engine has differing trim and power levels.

The engine is water-cooled, and is produced using cast-iron cylinder block, with removable wet type cylinder liners. The engine utilizes diesel fuel delivered in a direct injection method from individual electronically controlled and camshaft actuated unit pumps. The cylinder heads are separate units for each cylinder.

The crankshaft is a precision forged unit running in seven three-layer bearings, with counterweights bolted onto the crank webs, much like any other diesel motor of its vintage. The middle bearing is also the thrust bearing. The connecting rods are of a split design, with bronze bushings for the piston pin.

Data	value^[1]
Mercedes Benz Type	OM
Model	457.951 LA
Combustion System	Four-stroke diesel with direct injection
Number of cylinders, Cylinder arrangement	6, vertical in-line
Bore × Stroke, Displacement	128 × 155 mm, 11967 cc
Compression ratio	18,5:1
Rated power	260 kW at 2000 rpm
Maximum torque	1,6 kNm at 1100 rpm
Idle Speed	560 rpm
Cylinder Firing Order	1 - 5 - 3 - 6 - 2 - 4
Maximum pressure of injection nozzles	1800 bar
Max. operating temperature	100 °C
Oil pressure	nominal 2 – 5 bar (200–500 kPa), idle min 0,5 bar
Weight, dry	1045 kg

References

^[1]

Bibliography

Daimler Chrysler: Powersystems • Industrial Engines Maintenance and Repair Series 457, 500 and 900 Advanced Training. May 2003

2 : Mercedes-Benz engines|Diesel engines by model

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