difference between sulzer and man b&w engines
MAN B&W engine
- Lubrication of Crops Head is done by a telescopic pipe at 4 bar.
- Cylinder lubrication method is Alpha lubrication ( in 4-5 revolution only once )
- Individual fuel injection system
- Camshaft in B&w engine is driven by the chain drive with the 2-chains.
- Jerk type fuel pipe
- In this type of engines, bore cooked liner is used.
- Main Bearing is made up of tri-metal bearings with high load carrying capacity.
- Top piston rings is of CPR type.
- OROS type piston for better combustion area and reduction in piston temperature
- Mip :- Indicated mean pressure
- MIP can be found with the help of card diagrams.
- Bearing surface area of crosshead is larger.
- Grooves are provided with a machined channel to keep lubricating oil in the place.
- The same main lube oil system pump supplies the lube oil.
- The oil pressure is kept at 2-4 bar, which is the system pressure.
- Lube oil is delivered to the crosshead via a telescopic pipe connected to the guide.
- Lubrication of Crooshead is done by internal pipe through piston rod at pressure of 12 bar
- Cylinder lubrication is pulse lubrication
- Commin rail injection system
- Camshaft is driven by gear driven with timing gear
- Valve type fuel pipe
- Fine honed and bore cooked liner with large insulation.
- white metal bearing
- Top piston rings is chromium coating piston rings
- Convex shape piston with jet shaker cooling
- Mep :-Mean effective pressure
- This can be found on the shaft after all one loss ( i.e friction )
- Bearing surface area of crosshead is smaller
- Surface Bearing shell of sulzer engine is smooth.
- A separate crosshead pump supplies the lube oil.
- The lube oil pressure is kept between 12 to 16 bar.
- Lube oil is delivered to the crosshead via a swinging or articulated pipe.