Presently, the easiest way of creating motion from gasoline is to burn the gasoline inside an engine. Therefore, a car engine is generally known as internal combustion engine as combustion takes place internally.
Spark Ignition Engine is referred to the internal combustion engine in which fuel-air mixture is ignited with aspark within a cylinder. It is different from compression-ignitionengines, where only heat from compression can ignites the mixture. Spark-ignition engines can be eithertwo-strokeorfour-stroke.
However, these terms are not preferred, since spark-ignition engines can (and increasingly are) run on fuels other thangasoline, such asautogas(LPG), methanol,ethanol,compressed natural gas(CNG),hydrogen, and (in drag racing)nitromethane. A four-stroke spark-ignition engine is anOtto cycleengine.
Until recently, a major distinction between spark-ignition and compression-ignition engines has been where the fuel is mixed - spark-ignition engines mix fuel outside the cylinders and compression-ignition engines mix fuel inside the cylinders. However, both two-stroke and four-stroke spark-ignition engines are increasingly being designed withgasoline direct injection(GDi), eliminating this distinction between the two systems.
Compressed Natural Gas(CNG) is afossil fuelsubstitute forgasoline(petrol),diesel, or propanefuel. ...