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    Service Bulletin

    Wrtsil Switzerland Ltd PO Box 414 Tel. +41 52 262 49 22Wrtsil Schweiz AG CH-8401 Winterthur Fax +41 52 212 49 17Wrtsil Suisse SA Switzerland Email: [email protected]

    12.06.2001

    RTA53

    28.79.71.40

    Printed

    inSwitzerlans

    Technical Information to all Owners / Operatorsof Sulzer RTA Engines

    (except RTA 38 and RTA 48)

    Variable Injection Timing and

    Fuel Quality Setting

    Contents: Page

    1. Introduction 1

    2. Working Principle of the 1VIT and FQS

    3. Versions of the 4

    VIT and FQS Design

    4. Mechanically Controlled VIT 6and FQS

    5. Electronically Controlled VIT 7and FQS

    6. Operational Aspects 12

    7. Service Bulletin Published for 16Large Bore RTAType Engines

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    1. INTRODUCTION

    This Service Bulletin should be kept in a separate file in the control room. The respective pages ortables of the Service Bulletin with modifications to the Operating Manual, Maintenance Manualor Code Book should be copied and filed in the respective Manual or Book.

    2. WORKING PRINCIPLE OF THE VIT AND FQS SYSTEM

    2.1. Variable Injection Timing (VIT)

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    2.2. Fuel Quality Setting (FQS)

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    3. VERSIONS OF THE VIT AND FQS DESIGN

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    4. MECHANICALLY CONTROLLED VIT AND FQS

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    5. ELECTRONICALLY CONTROLLED VIT AND FQS

    5.1. General

    5.1.1. Control Circuit

    5.1.2. Arrangement of Fuel Regulating Linkage(Please refer to Fig. 5)

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    5.2. Electronic VIT and FQSVIT = f (LI)(Please refer to Fig. 6)

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    5.3. Electronic VIT and FQSVIT = f (n, pch)(Please refer to Fig. 7)

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    5.4. Electronic VIT and FQSVIT = f (n, pch) IMO(Please refer to Fig. 8)

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    6. OPERATIONAL ASPECTS

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    6.1. Setting of Regulating Linkage and Fuel Injection Pumps

    6.1.1. Checking of Regulating Linkage

    6.1.2. Fuel injection Pumps

    http://rta-11_2.pdf/http://rta-11_2.pdf/http://rta-11_2.pdf/http://rta-11_2.pdf/http://rta-11_2.pdf/
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    6.2. VIT Actuator Setting

    6.3. Checking of the Control Performance for VIT= f (LI)

    6.4. Checking of the Control Performance for VIT= f (pch, n)

    6.5. Special Engine Running Conditions

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    6.5.1. Running-in of new Cylinder Liners and / or Piston Rings

    6.5.2. Failure of VIT

    6.6. FQS Setting

    6.7. Ignition Ratio

    Wrtsil Switzerland Ltd has issued this Service Bulletin with their best knowledge and ability.

    However, Wrtsil Switzerland Ltd can not take any liability for any or all information containedin this or any other Service Bulletin.

    Changes of any nature to the form and or to the content of this or any other Service Bulletin aspublished by Wrtsil Switzerland Ltd, are not permitted.

    http://rta-18_1.pdf/http://rta-18_1.pdf/http://rta-18_1.pdf/http://rta-18_1.pdf/http://rta-18_1.pdf/
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    7. SERVICE BULLETINS PUBLISHED FOR LARGE BORE RTATYPE ENGINES