Scope
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Ships, July 2022 - Main and Auxiliary Machinery - Reciprocating Internal Combustion Engines - Scope

Scope

Engines providing power for services essential to the safety of the vessel are to be constructed under survey and in accordance with the requirements of this Chapter (see also Pt 1, Ch 2, 2.4 Class notations (machinery) 2.4.1).

The requirements of this Chapter are applicable to reciprocating internal combustion engines operating on liquid, gas or dual fuel for main propulsion and essential auxiliary services (hereinafter referred to as engines). Pt 5, Ch 2, 3 Crankshaft Design is not applicable to auxiliary engines having powers of less than 110 kW.

For the purposes of this Chapter engine type, expressed by the manufacturer/licensor’s designation, is defined by:

  1. the bore and stroke;

  2. the method of injection (i.e. direct injection, indirect injection, pilot injection);

  3. the fuel pump and injection system (independent line to fuel oil valve, common rail);

  4. the valve and injection operation (by cams or electronically controlled);

  5. the fuel(s) used (liquid, dual-fuel, gaseous, etc.);

  6. the working cycle (4-stroke, 2-stroke);

  7. the gas exchange (naturally aspirated, turbocharged, etc.);

  8. the method of turbocharging (pulsating system, constant pressure system);

  9. the charging air cooling system (with or without intercooler, number of stages);

  10. cylinder arrangement (in-line, vee, etc.);

  11. the maximum continuous power per cylinder (or maximum continuous brake mean effective pressure) at maximum continuous speed;

  12. the manufacturer and type of governor (and control system if applicable) fitted.

A complete engine includes the control system, turbocharger(s) and all ancillary systems and equipment referred to in this Chapter that are used for operation of the engine for which there are rule requirements; this includes systems allowing the use of different fuel types.

Arrangements for dual fuel engines will be specially considered.

Primary exhaust gas emissions abatement plant (where fitted) is to meet the requirements of this Chapter; additionally, it is to meet the requirements of Pt 5, Ch 24 Emissions Abatement Plant for Combustion Machinery. Where secondary exhaust gas emissions abatement systems are fitted to engines, they are to meet the requirements of Pt 5, Ch 24 Emissions Abatement Plant for Combustion Machinery.

Parent topic: Chapter 2 Reciprocating Internal Combustion Engines
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