-: Carburetion :-
The process of formation of combustible fuel-air mixture by mixing the proper amount of fuel with air before admission to engine cylinder is called carburetion and the device which used for this process is called a Carburetor .
-: Principle of Carburetion :-
The principle of carburetion is based on the Bernoulli Principle . In simple words , we can say that as the velocity increases then the pressure will decreases . The air and gasoline go into the combustion chamber of the engine through the carburetor . The main principle and working of any carburetion is depended only on the venturi tube which is the main part of carburetor . The pressure difference between chamber is responsible for the rate at which fuel/ gasoline discharge into the air . The pressure difference decides the mixing ratio of air and fuel which is controlled by the throttle valve .
-: Factors Affecting Carburetion :-
The various factors which influences the process of carburetion is given as -
1- The engine speed i.e. the time available tor the preparation to the mixture.
2- The vaporisation characteristics of fuel .
3- The temperature of incoming air.
4- The design of the carburetor.
Note:- (i)- In case of high speed engines , the time duration available for the formation of mixture is very small and limited . The time duration for mixture formation and induction may be of the order of 10 to 5 milliseconds .
(ii)- In order to achieve high quality carburetion with in such a short time requires good vaporisation characteristics of the fuel which are ensured by presence of high volatile hydrocarbons in the fuel .
(iii)- The temperature is a factor which effectively controls vaporisation process of the fuel . If the temperature of incoming air is high , it results in higher rates of vaporisation . The mixture temperature can be increased by heating the induction manifold but it will result in reducing power due to reduction in mass flow rate .
-: Features of Carburetion :-
Carburetion is required to provide the following essential features :-
1- To operate satisfactorily when cold , or when hot .
2- To operate satisfactorily both on level and hills .
3- To overcome air - cleaner restriction .
4- To withstand vibrations and road jerks .
5- To meter and supply the proper quantity and proportion of air and fuel at correct strength under all conditions of load and speed of the engine of the engine of the car for .
The process of formation of combustible fuel-air mixture by mixing the proper amount of fuel with air before admission to engine cylinder is called carburetion and the device which used for this process is called a Carburetor .
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-: Principle of Carburetion :-
The principle of carburetion is based on the Bernoulli Principle . In simple words , we can say that as the velocity increases then the pressure will decreases . The air and gasoline go into the combustion chamber of the engine through the carburetor . The main principle and working of any carburetion is depended only on the venturi tube which is the main part of carburetor . The pressure difference between chamber is responsible for the rate at which fuel/ gasoline discharge into the air . The pressure difference decides the mixing ratio of air and fuel which is controlled by the throttle valve .
-: Factors Affecting Carburetion :-
The various factors which influences the process of carburetion is given as -
1- The engine speed i.e. the time available tor the preparation to the mixture.
2- The vaporisation characteristics of fuel .
3- The temperature of incoming air.
4- The design of the carburetor.
Note:- (i)- In case of high speed engines , the time duration available for the formation of mixture is very small and limited . The time duration for mixture formation and induction may be of the order of 10 to 5 milliseconds .
(ii)- In order to achieve high quality carburetion with in such a short time requires good vaporisation characteristics of the fuel which are ensured by presence of high volatile hydrocarbons in the fuel .
(iii)- The temperature is a factor which effectively controls vaporisation process of the fuel . If the temperature of incoming air is high , it results in higher rates of vaporisation . The mixture temperature can be increased by heating the induction manifold but it will result in reducing power due to reduction in mass flow rate .
-: Features of Carburetion :-
Carburetion is required to provide the following essential features :-
1- To operate satisfactorily when cold , or when hot .
2- To operate satisfactorily both on level and hills .
3- To overcome air - cleaner restriction .
4- To withstand vibrations and road jerks .
5- To meter and supply the proper quantity and proportion of air and fuel at correct strength under all conditions of load and speed of the engine of the engine of the car for .
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