Engine fundamentals 109 Actions within a cylinder 110 Reciprocating to rotary motion 110 Cycles of engine operation 112 Fourstroke cycle (petrol engine) 112 Twostroke cycle (petrol engine) 116 Diesel engine operation 118 Rotary engine 119 Multicylinder engines 119 Engine classifications 121 Engine systems 122 Technical terms 122 Review questions 123