Question

Combustion is determined by what factor(s): Choose the best answer The amount of fuel mixed with the air All of the above The type of fuel used The volume of air compressed

Answer 1

solution FACTORS DETERMINING COMBUSTION Combustion is determined by what factoals) Correct Answer All of the above Explaination The amount of fuel mixed with the air The Abi-fuel satio is an important factor in determining the combustion. The Air-fuel ratio (AFR) is the mass ratio of air to fuel present in an internal Combustion engine. The reaction mixture oxygen in the air is caused from burning of fuel. of of fuel with Rich lean Maximum power Power Power Fuel Consumption Best fuel economy Air- fuel ratio

Different fuel guves different Alu-fuel ratio (AFR) . The AFR is necessary for controlling emission and performance tuning reasone The AFR is defined Air-fuel ratio (AFRO mfuel Mair for anti- The AFR vs related to mixture of air and fuel . The AFR is important measure pollution reasons and also to know to use efficient ly the available oxygen to burn the fuel com ompletely or at least the best possible value. The ratio gap can be adjusted for meeting the changing requirements of the engine and also affect the speed of flame during travel. The Stoichiometric mixture for gasoline engine is the ideal ratio of air to fuel that burns all fuel with no excess air Fou gasoline fuel the stoichiometric au- fuel mixture is about 14.7:1 every gram of fuel , 14.7 grams of air are required. a For one

dre The type of fuel used Combustion is also determined by the type of fuel used. Detonation greatly depends upon the fuel employed. In order of decreasing tendency to detonate the fuele Parafine, Aerometics, Naphthenes. Generally of molecular structure is compact there is lower tendency to detonate . The products wed are Benzene, Toluene and xylene that are known as aeromatics and they have least tendency for detonation - Alcohol and Benzol have lower calorific values than gasoline and hence the fuel consumphion is increased if they have been used. Volume of air Compressed The volume of use compressed is determined by compression ratio and determines the combustion. The volume of air compressed is influenced by the compression ratio, Compression Ratio (Rc) Rc) - Po Ps Pp - Discharge pressure Ps Suction pressure