10 RT-Flex Design

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RT-flex TraininPhilosophy and Design Aspects of RT-flex

ec no ogy an erences o onven ona

RTA Engines

Chapter 10

©Wärtsilä Land & Sea Academy Page 1 Chapter 10 25-J un-08

.

Feb. 2010



RT-flex Design Aspects History

RTA

z RTA introduced in 1982

z Over 2’800 RTA engines sold with 69’401’216 BHP / 51’030’306 kW

RT-flex

z First RT-flex workshop in 1996

z Start of first RT-flex engine in 2001 (6RT-flex58T-B / GYPSUM CENTENNIAL)

z Over 750 RT-flex engines sold with total more than 31’500’000 BHP (J une 2010)

©Wärtsilä Land & Sea Academy Page 2 Chapter 10 Feb. 2010



RT-flex Design Aspects RTX Generations

1st eneration 2nd eneration 3rd eneration 4th generation

RTX-1 RTX-2 RTX-3 RTX-4

2008




RT-flex Design Aspects Characteristic Data




RT-flex Design Aspects Cylinder Pressures




RT-flex Design Aspects Power Range




RT-flex Design Aspects Differences RTA to RT-flex engines




RT-flex Design Aspects Differences to RTA engines

© Wärtsilä Land & Sea Academy Page8

Chapter 10 25-J un-08




RT-flex Design Aspects Comparison Table

Conventional engine RT-flex

Developing fuel oil pressure One fuel pump per cylinder Fuel pumps on supply unit

„Storing“ of fuel oil pressure - Fuel rail

Timing of injection Fuel cam on camshaft WECS-9520 / ICU

Developing pressure forexhaust valve activation

One activating pump perc linde

Servo pumps on supply unit

„Storing“ of servo oil pressure - Servo rail

Timing of exhaust valve Valve cam on camshaft WECS-9520 / VCU

Fuel pump actuator Regulating power/speed Keeping fuel rail pressure

Electronic governor Releasing fuel pump position Releasing fuel command too e ac ua or

Power/speed control by Fuel pump Fuel quantity piston




RT-flex Design Aspects Comparison Table

Conventional engine RT-flex

Timing of starting air Starting air distributor WECS-9520

Reversing Reversing of cam WECS-9520

Alarm and monitoring system External (internal: OSC-3) External

Emergency control By mechanic shaft and camsactin on neumatic valves of

Backup panels delivermanoeuvrin si nals and fuel

the engine control

commands to WECS inputs,independent from the RCinputs channels

Load signal RC receives load signal fromangle transmitter on

intermediate shaft

WECS supplies a fuelcommand feedback as load

signal to the RC systemVIT, VEC Functions provided in RC

systemFunctions (plus VEO) includedin WECS

Wiring from engine to external Individual cables Bus-system




RT-flex Design Aspects Why Common-Rail

Possibilit ies to reduce emissions

Reduced fuel consumption at part load

ower m n mum eng ne speeBetter manoeuvrabil it




RT-flex Design Aspects Advantages of RT-flex

Wärtsilä 6 RT-flex58T-B MV Gypsum Centennial

0.50

0.35

0.40

0.45

F S N ] HFO

380 cSt

3% sulphur

0.25

0.30

k e N u m b e r [

0.1% ash

OFF Aux . Blow er ON

0.10

0.15

.

F

i l t e r S m o

Co n ven tio n al lo w s eed en in e

Smoke visibi l i ty l imit

0.00

0.05

0 10 20 30 40 50 60 70 80 90 100

6RT-flex 58T-B w ith com mo n rail


ng ne oa



RT-flex Design Aspects Advantages of RT-flex




RT-flex Design Aspects IMO NOx Limits




RT-flex Design Aspects Engine Numbering and Designations

Turbocharger 1 Turbocharger 2

Cylinder Numbering

DRIVING END FREE END


rus earng a s a n earng um erng



RT-flex Design Aspects Engine Numbering and Designations

FUEL SIDE EXHAUST SIDE

Clockwise RotationCounter-clockwise Rotation


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10 RT-Flex Design