wartsila engine products

1 Wrtsil 17 March 2010 Engine products / WLSA

WRTSIL ENGINE PRODUCTS


In general we distinguish: 2-stroke engines 4-stroke engines

Engines categorised by the fuel type used for the engines: Oil fired engines Gas fired engines Dual fuel engines that can handle both oil and gas.

Engines categorised by the purpose of an engine: to drive a propulsion to drive a generator to power other devices such as a pump.

Engine Products


2-STROKE ENGINES


2-stroke engines

The current low-speed engine portfolio comprises the Wrtsil RTA and RT-flex engine types which cover a power range from 5100 kW to 80,080 kW.

Wrtsil RTA-series engines: Traditional camshaft-controlled low-speed diesel

engine Wrtsil RT-flex engines:

Based on the RTA-series but have electronically-controlled common-rail systems for fuel injection and valve actuation.

These engines are marketed world-wide for application in the propulsion of all types of deep-sea ships.

Low-speed engines are developed, designed, marketed and serviced by Wrtsil.

The engines are manufactured by specialised engine manufacturing companies under licence from WrtsilSwitzerland.


4-STROKE ENGINE PRODUCT NAMES


Engine Product Names: Configuration

e.g. Wrtsil 18V32DF Wrtsil = Brand 18V = Cylinder configuration: V-engine = V, in-line engine = L 32 = Engine group DF = Technology (if in use)

e.g. Wrtsil Auxpac 975W6L20. Auxpac engines are identified with powered output (electrical),

Engine groups 20, 26, 32, 34, 38, 46, 46F, 50, 64

Technology DF = Dual Fuel GD = Gas Diesel SG = Spark-ignited Gas


4-STROKE ENGINES


Wrtsil 20

Main data Cylinder bore ..................................200 mm Piston stroke...................................280 mm Cylinder output .................. 180, 200 kW/cyl Speed ...........................................1000 rpm Mean effective pressure ........ 24.6, 28.0 bar Piston speed.................................... 9.3 m/s

Options: Common rail fuel injection, humidification of combustion air for NOXreduction.

Cylinder configurations 4L20 6L20 8L20 9L20


Wrtsil 32

Main data Cylinder bore ..................................320 mm Piston stroke...................................400 mm Cylinder output .......................... 500 kW/cyl Speed .............................................750 rpm Mean effective pressure .................24.9 bar Piston speed.................................. 10.0 m/s

Cylinder configurations 6L32 8L32 9L32 12V32 16V32 18V32 20V32


Wrtsil 46

Main data Cylinder bore ..................................460 mm Piston stroke...................................580 mm Cylinder output ................ 975, 1050 kW/cyl Speed .....................................500, 514 rpm Mean effective pressure ........ 23.628.8 bar Piston speed............................. 9.7, 9.9 m/s

Options: Common rail fuel injection, humidification of combustion air for NOXreduction, crude oil.

Cylinder configurations 6L46 8L46 9L46 12V46 16V46 18V46


Wrtsil 46F

Main Data Cylinder bore ..................................460 mm Piston stroke...................................580 mm Cylinder output ........................ 1250 kW/cyl Speed .............................................600 rpm Mean effective pressure .................25.9 bar Piston speed.................................. 11.6 m/s

Options: Twin plunger injection pumps, humidification of combustion air for NOXreduction, variable inlet valve closure.

Cylinder configurations 6L46F 8L46F 12V46F 20V46F


COMMON RAIL SYSTEM


Common Rail System advantages

Smokeless operation at all loads and speeds. Smokeless start of the engine. Improved total fuel economy. Flexibility for different fuels without hardware modifications (heavy fuel,

diesel oil, gas turbine fuel, water-fuel emulsion).


Conventional vs. common rail injection

Conventional injectionsystem

Common rail injection

Fuel pressureproduced each time by the injection pump

Mechanical/hydrauliccontrol of injection

Electronic/hydrauliccontrol of injection


1) Injector

2) Accumulator

3) HP-pump

4) Shielded HP-pipes

5) Drive cam

Wrtsil Common Rail design


DUAL-FUEL ENGINES


Wrtsil 34 DF

Main data Cylinder bore .................................340 mm Piston stroke...................................400 mm Cylinder output .................. 435, 450 kW/cyl Speed .....................................720, 750 rpm Mean effective pressure ........ 20.0, 19.8 bar Piston speed........................... 9.6, 10.0 m/s

Cylinder configurations 6L34DF 9L34DF 12V34DF 16V34DF


Wrtsil 50 DF

Main data Cylinder bore ..................................500 mm Piston stroke...................................580 mm Cylinder output .......................... 950 kW/cyl Speed ....................................500, 514 rpm Mean effective pressure ........ 20.0, 19.5 bar Piston speed............................. 9.7, 9.9 m/s

Cylinder configurations 6L50DF 8L50DF 9L50DF 12V50DF 16V50DF 18V50DF


Dual Fuel Engines - Operating principle

? The gas is mixed with air before the intake valves. ? After the compression phase, the gas-air mixture is ignited by a small

amount of liquid pilot fuel.

* ** ** * **

******** * ****

* *

Intake ofair and gas

Compression ofair and gas

Ignition bypilot diesel fuel

Gas mode:

? Otto principle? Low-pressure gas

admission

? Pilot diesel injection

Ex. In. Ex. In.Ex. In.


Dual Fuel Engines Operating principle

This is a normal diesel process with camshaft-operated liquid fuel pumps running in parallel with the process and working as a stand-by.

The engine can be switched automatically from fuel oil to gas operation at loads below 80 % of the full load.

Diesel mode:

? Diesel principle? Diesel injection? Back-up fuel system

Intake ofair

Compression ofair

Injection ofdiesel fuel

Ex. In. Ex. In.Ex. In.


Wrtsil 32 GD

Main data Cylinder bore320 mm Piston stroke.350 mm Rated speed .750/720 rpm Mean piston speed8.75/8.4 m/s BMEP.21.3/24.0 bar Cylinder output375 kW

Cylinder configurations 12V32GD 16V32GD 18V32GD


Gas-diesel engines operating principle

Gas mode: The gas is injected at high pressure after the pilot

fuel and is ignited by the flame from the pilot fuel injection.

Liquid Fuel mode: The gas-diesel engine can be switched over

instantly to operation. The liquid fuel can be light fuel oil, heavy fuel oil

or crude oil. The process is the same as the conventional

diesel process.

Fuel Sharing mode: The ratio between liquid and gas fuel amounts

can be controlled and varied during operation. The operating window is 35 to 90% load and the

gas/liquid fuel ratio can vary from 80/20 to 15/85.

The gas-diesel process can tolerate big variations in the gas quality and is especially suitable for non-pipeline quality gas, such as associated gas in oil fields.


WRTSIL GAS ENGINES


Wrtsil 34SG

Main data Cylinder bore 340 mm Piston stroke. 400 mm Speed.. 720 / 750 rpm Mean effective pressure.. 20.0 / 19.8 bar Piston speed... 9.6 / 10 m/s

Cylinder configurations 9L34SG 16V34SG 20V34SG


SG engines operating principle

The SG engines are spark-ignited lean-burn engines.

The gas is mixed with air before the inlet valves.

The gas is also fed into a small prechamber, where the gas mixture is rich compared to the gas in the cylinder.

The gas-air mixture in the prechamber is ignited by a spark plug.

The flames from the nozzle of the prechamber ignite the gas-air mixture in the whole cylinder.


The lean-burn concept

In a lean-burn gas engine, the mixture of air and gas in the cylinder is lean, i.e. more air is present in the cylinder than is needed for complete combustion.

With leaner combustion, the peak temperature is reduced and less NOX is produced.

Higher output can be reached while avoiding knocking and the efficiency is increased as well, although a too lean mixture will cause misfiring


NON-PORTFOLIO ENGINES


Non-Portfolio Engines

Engines that are no longer part of the official Wrtsil product portfolio (in active production), are called non-portfolio engines.

Bolnes Crepelle engines Deutz marine engines Nohab Stork engines Sulzer A/S UD 25 engines UD 30 engines UD 33 engines UD 45 engines W 200 engines Wrtsil 32DF Wrtsil 32GD Wrtsil 38A Wrtsil Vasa 32

29 Wrtsil 17 March 2010 04 Engine products / WLSA

wartsila engine products

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