Engine:
Engine “A machine for converting energy into mechanical force and motion.”
Heat Engine:
Heat Engine An engine which uses heat to convert the chemical energy of a fuel into mechanical force and motion
Advantages & Disadvantages of Two-stroke Engines:
Advantages & Disadvantages of Two-stroke Engines Advantages (over 4-stroke Engines) Power developed nearly twice compared Work required to overcome the friction of the exhaust and suction strokes is saved. More uniform turning moment - lighter flywheel Engines lighter & occupy less space Construction is simple - reduces maintenance problems Because of scavenging, burnt gases do not remain in the clearance space as in case of four-stroke engines.
Advantages & Disadvantages of Two-stroke Engines:
Disadvantages (over 4-stroke Engines) High speed - less efficient - reduced volumetric η Short ckt.ing increases fuel consumption & reduces the thermal η Effective compression is less Liable to cause a heavier consumption of lubricating oil. With heavy loads, engines get heated due to excessive heat produced. Also at light loads, running of engine is not very smooth because of the increased dilution of charge. Advantages & Disadvantages of Two-stroke Engines
Energy Conversion:
Energy Conversion “All internal combustion engines exhibit and convert different forms of energy.” “Energy is the resource that provides the capacity to do work”. The two forms of energy used in engines are potential and kinetic.
Potential Energy :
Potential Energy “Stored energy a body has due to its position, chemical state, or condition.”
Kinetic Energy:
Kinetic Energy