By inefficient combustion. A properly tuned engine will burn fuel very efficiently and the only emmissions would be carbon dioxide and water which is actually a good thing. An engine running rich or lean (trying to burn fuel without enough air, or burning fuel with too much air) will have a lot of hydrocarbons (basically gas) and NOx (oxides of nitrogen) coming out of its exaust. These are not so good.
14.7
By nature ,all combustion needs air .
The internal combustion engine has created a truly enormous quantity of air pollution. Most of the smog found in large cities is created by the internal combustion engines of cars, although factories can also cause severe air pollution.
Ideally it is 14.7 air to 1 fuel in an internal combustion engine.
Carburetor - a device that blends air and fuel for an internal combustion engine.
An internal combustion engine is an engine that uses air, fuel, and spark to create the power to move. A perfect air-fuel mixture is pulled into the cumbustion chamber, its compressed by the piston, and once its compressed the spark plug ignites the air-fuel mixture and the process is completed.
A boost gauge in an internal combustion engine has the role of a pressure gauge. The gauge indicates the manifold's air pressure or a turbocharger or supercharger's boost pressure.
Not necessarily but usually
When the engine detonates its referring to the engine giving spark to the compressed air/fuel in the cylinder, when theres combustion its simply the explosion that happens after ignition.
It mixes fuel and air in the proper proportions to be burned in an internal combustion engine.
As far as I know its the Carburettor
internal combustion engine is one in which we burn the air fuel mixtue inside the cylinder of engine eg car engine external combustion engine is one in which we burn the fuel outside of engine and then take the hot gases inside the prime movers for taking out work eg gas turbine