The choke is used on petrol engines with carburettors, to increase the fuel to air ratio, for better starting.
It is called a 'choke' because it actually chokes off some of the air entering the carburettor and is a simple metal flap across the air intake.
By choking off some of the air, a greater vacuum is formed, which draws more fuel from the jets.
A cold engine requires slightly more petrol than a warm engine for the spark to ignite the mixture. Once warm, the engine needs less fuel in the mixture (14:1 , air:fuel)and will run rough and waste fuel if the choke is left on.
Modern engines do not have carburettors or chokes, being fuel injected.
The choke function is taken care of by a cold start program where the computer varies the quantity of fuel injected with respect to the air mass and temperatures.
Diesel engines also need a 'cold start device', but this is not a choke. As diesels are injection engines, this is taken care of by changing the fuel pump setting via a switch, or by computer control of common rail injectors.
a gasoline engine is an Internal combustion engine
Internal combustion engine.
and internal combustion engine and a gasoline engine are the same thing.
Reciprocating engines (piston engines) are internal combustion engines. Rotary engines ( Wankel engine) is also an internal combustion engine. In general, all types of engines in which the combustion chamber is an integrating part of the engine is considered a internal combustion engine.
in internal combustion engine combustion happens internally in cylinder and in external combustion engine combustion happens externally in boiler
combustion engine
The four-stroke engine used in automobiles is an example of an internal combustion engine.
In an internal combustion engine fuel is burned in a combustion chamber or cylinder inside the engine
The waste products of combustion leave the internal combustion engine through the exhaust valve.
The internal combustion engine give rise to the auto industry.
who was the first person to invent the internal combustion engine
A steam engine is an external combustion engine.