Learning chapter

Engine Basics & Cycles

4 lessons

Engine fundamentals first: Otto, Diesel and dual cycles, engine terminology, and two-stroke vs four-stroke differences — the base every Motor answer builds on.

This chapter collects 4 illustrated lessons on Engine Basics & Cycles as part of Marine Propulsion & Diesel Engines, ordered as they are best studied. It opens with Theoretical Cycles — Otto, Diesel & Dual Combustion, Diesel Engine Basics — Terms, Strokes & Timing, Diesel Engine Types — 2-Stroke Crosshead vs 4-Stroke Trunk, Engine Nomenclature — Decode MAN, Sulzer, Daihatsu & Spec Sheets. Each lesson is written for MEO oral and written preparation: definitions first, then how the system behaves, then the checks and figures used in practice.

Explore the lessons

01 Theoretical Cycles — Otto, Diesel & Dual CombustionLearn theoretical cycles: air-standard assumptions, Otto constant-volume, Diesel constant-pressure and dual combustion cycles with p-V diagrams.4 sections 02 Diesel Engine Basics — Terms, Strokes & TimingLearn diesel basics: stroke, swept volume, compression ratio formula, four-stroke events, two-stroke cycle with blower, and timing diagram reading.4 sections 03 Diesel Engine Types — 2-Stroke Crosshead vs 4-Stroke TrunkLearn diesel classification and the full 2-stroke crosshead vs 4-stroke trunk comparison: power, reversing, scavenging, MEP, weight and maintenance.4 sections 04 Engine Nomenclature — Decode MAN, Sulzer, Daihatsu & Spec SheetsDecode marine engine model numbers: MAN B&W 6S80MC-C and 7L80GFCA letters, K/L/S/G stroke classes, Sulzer 7RTA84M, Daihatsu aux codes and spec sheet reading with MEP Pmax SFOC.4 sections