Where is air and fuel mixed in an engine?
In a spark ignition engine, the fuel is mixed with air and then inducted into the cylinder during the intake process. After the piston compresses the fuel-air mixture, the spark ignites it, causing combustion.
What part of a car engine is responsible for blending air and fuel before combustion?
Most carburetors are manual non-electric devices that are used for mixing vaporized fuel with air to produce a combustible or explosive mixture for internal combustion engines.
In which stroke of diesel engine ignition mixture of air and fuel expands?
Typically the value is approximately 9:1 in spark ignition engines and 15:1 in diesel engines. 3. Power stroke: when the piston ascends and reaches top dead center, an electric current ignites the spark plug and as the mixed gas burns, it expands and builds pressure in the combustion chamber.
Where is the lean air-fuel mixture needed?
Lean Air-fuel Mixture Is Required For(A)Idling(B) Cruising (C)Starting (D)Acceleration. A lean air-fuel mixture occurs when there is more air than the ideal air-fuel ratio. This can be good for fuel economy and emissions but bad for power.
What changes take place to air when it is compressed in diesel engines?
Air is compressed in the diesel engine cylinder before the fuel is injected so there can be no pre-ignition. Diesel fuel evaporates as the fine mist particles from the fuel injectors ignite in the hot, compressed air. The fuel also lubricates the fuel injector pump.
Are engines where the fuel combustion takes place outside the engine?
An external combustion engine burns fuel externally, or outside the engine. An external combustion engine burns fuel to heat water and produce steam.
Which engine does the fuel combustion takes place outside the engine?
Engines are classified into two types, viz., IC engine, and external combustion (EC) engine. In IC engines, the combustion of fuel takes place inside, whereas in EC engines the fuel combustion takes place outside the cylinder.
What happens to the air fuel mixture?
When fuel burns in the presence of oxygen, it is converted to carbon dioxide, water, and heat. … Air contains approximately 21% oxygen and 79% nitrogen. In this case, the reaction for complete combustion becomes: CH4 + 2O2 + 7.53N2→ CO2 + 2H2O + 7.53 N2 + Heat (1,013 Btu/ft.3)