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...Lecture two stroke and four engines working principles applications types power efficiency heat engine is a machine for converting developed by burning fuel into useful work it can be said that equipment which generates thermal energy transforms mechanical classification of based on combustion i external ii internal here the medium steam generated in boiler located out side allowed to cylinder operate piston do takes place inside within this added air thus pressure increased tremendously high moves rotates crank shaft done used diesel petrol gas as propane butane or methane gases are ignition spark carburetor type compression injector mixture drawn using plug produces ignites such called constant volume c v compressed due temperature rises at stage sprayed fine particles very gets ignited cp because almost when taking cycle completed revolutions crankshaft one revolution construction an ic converts reciprocating motion rotary means connecting rod close fit rings inserted circumferentia...