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race cars run a very rich mixture. when the engine dies, the unburnt fuel in the exhaust system catches fire from the heat in the exhaust pipes. when the engine is refired, the fire blows out. Flames come out the exhaust during the deceleration of a racing car because during wide open throttle the intake manifold and intake port are filled with a homogenized air fuel mixture. When the throttle is suddenly closed the velocity of this mixture stops and the pressure drops into a strong vacuum. This causes the fuel to drop out of suspension (in the air) and return to a liquid state. This liquid fuel is drawn through the combustion chamber and ignites when it reaches the hot exhaust valve and pipes resulting in the visable flames from the end of the pipe.
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∙ 15y ago
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What are exhaust fumes from cars an example of?
exhaust fumes of a car
Do you have to turn motor off before pumping gasoline in your car?
YES ! If you don't, there is a possibility of either a stray spark from the engine igniting the fumes from the fuel, or a spillage of fuel onto your cars exhaust bursting into flames !
Why does your car shoot flames from the exhaust?
Flames coming out the exhaust is the result of the exhaust igniting fuel that was not burned inside the engine. Occasional pops of flame can be from backfiring, which shoots out unbirned gas that gets ignited from the heat of the exhaust. On cars without electroinc ignition or fuel injection, which covers all older cars, turning the ignition off while moving and then back on can result in a backfire and flames.
When was muffler invented?
When people started objecting to the noise and smell of cars exhaust fumes, around 1898.
Why are rusty cars a safety hazard?
One reason would be exhaust fumes may enter the cabin area.
How do you make flames shoot out exhaust?
Flames shooting out of race car exhaust pipes is caused by unused fuel passing from the cylinder into the exhaust system and lighting by the heat of the exhaust. Race cars run a different grade of fuel than a normal passenger car so this is common. You have to really soop up a normal car engine for this to happen on a normal car.
What is the evap system?
All newer cars have a Evap system, the function of the system is to re-circulate gas and exhaust fumes so they dont vent into the atmosphere.
How is platinunm used in cars?
In catalytic converters in cars.It removes harmful nitrogen based gasses form your cars exhaust fumes by catalysing a reaction which makes the gasses more stable and less damaging to the environment.
How do MOT tests help combat air pollution?
As engines grow older their combustion quality degrades which results in higher levels of pollutant in the exhaust fumes. An MOT test (required annually for cars older than 3 years) includes a test of the exhaust fumes to identify problems with either the engine, or the exhaust / catalytic convertor systems.Unchecked, so called dirty cars would be allowed to continue driving on the roads producing significantly increased levels of pollution.
Why do NASCAR cars make a spark?
The cars spark from bottoming out on the track. The steel grinding the asphalt throws the sparks out from under the car. Flames also comes out of the exhaust from the extra fuel that isn't burned when they let off the gas.
What are dangers of car gas fumes?
The fumes from an cars exhaust contain carbon monoxide. Carbon monoxide is a colorless, odorless, tasteless, toxic gas that will kill you with no warning signs. It may cause headaches, dizziness, and fatigue. With enough exposure you will die. Even with Catalytic converters there is still about 2% CO in the exhaust. There is also Hydrocarbons, Nitrogen, & Sulfur.
Why is petrol used in a car engine that gives off exhaust fumes harmful?
Because today we haven't another alternative; electrical cars, hydrogen battery, etc. are now more expensive,
