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Qaiphyx
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What are all the given aspects of this?
I understand how the reaction happens, but what about it pushes the piston.
I understand how the reaction happens, but what about it pushes the piston.
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Qaiphyx said:... what about it pushes the piston.
russ_watters said:It's the pressure.
Qaiphyx said:Caused by the molecular expansion due to the exothermic reaction?
Where is the pressure coming from?
Qaiphyx said:What are all the given aspects of this?
I understand how the reaction happens, but what about it pushes the piston.
Besides the Temperature increase, there is a very high increase in the 'n' of the equation -number of moles-. The gasoline enters as liquid and changes into gas.Dr Lots-o'watts said:If you need an equation, the ideal gas law should be a first crude approximation : PV = nRT. The temperature in the cylinder clearly increases as the fuel/air mixture burns, and whatever gas is present has to increase either P, V or both to satisfy the gas law. Since the cylinder is made of solid steel, the only way V is going to increase is by having the piston head move away, bringing along a crankshaft rotation.
Sakha said:Besides the Temperature increase, there is a very high increase in the 'n' of the equation -number of moles-. The gasoline enters as liquid and changes into gas.
When fuel and air are ignited in the combustion chamber, a controlled explosion occurs. This explosion creates a rapid expansion of gases, which produce a high amount of pressure. This pressure pushes against the piston, forcing it to move downwards.
The explosion is caused by a controlled ignition of fuel and air in the combustion chamber. This ignition is usually initiated by a spark plug, which ignites the fuel and air mixture, resulting in the explosion.
Yes, the size of the explosion directly affects the amount of pressure produced and therefore, the force pushing against the piston. A larger explosion will create more pressure, resulting in a stronger push on the piston.
Yes, the explosion must occur at the right time in order to push the piston effectively. This timing is controlled by the engine's timing mechanism and is crucial for the engine to function properly. If the timing is off, it can result in engine knocking or loss of power.
No, an explosion can only push the piston in one direction. In a four-stroke engine, the explosion occurs on the top of the piston, pushing it downwards. The upward movement of the piston is achieved through other mechanisms such as the crankshaft and connecting rods.