What role does Quantum Mechanics play in a internal combustion engine?

In summary, the conversation discussed the role of thermodynamics and quantum mechanics in internal combustion engines. It was mentioned that classical constitutive relations and material properties are derived from QM, but its only direct application in IC engines is in flash memory ICs in the ECU and other electronics. The stability of atoms, explained by QM, was also mentioned as a possible factor in the stability of IC engines. The method of heat energy changes at an individual level was also questioned, and it was suggested that the answer could be found in a statistical mechanics book, with no direct involvement of quantum physics. The conversation was ultimately closed with the suggestion to consult a statistical mechanics book for further information.
  • #1
obbeel
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Thermodynamics deal with quantum mechanics all the time, so I wondered what role it played in a internal combustion engine. Could we calculate it and how does it affect the engine's final output?
 
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  • #2
Internal combustion engines are classical.

Of course you can always apply QM to classical systems if you want to make a point. And a lot of the classical constitutive relations and material properties would be derived from QM in principle if not in practice
 
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  • #3
obbeel said:
so I wondered what role it played in a internal combustion engine.
About the only place is in the flash memory ICs in the Engine Control Unit (ECU) and other electronics (like the Entertainment Center). Can you say why flash memory ICs use QM in their operation? What part of their operation specifically? :wink:
 
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  • #4
I don't really understand the question. The model T certainly predates quantum theory so Henry Ford did OK.
But the world is unstable according classical theory, so there is that.
 
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  • #5
I was going to write something much like @hutchphd did. One might say that QM explains the stability of atoms, and IC engines are made of atoms, so... but I somehow don't think this is what the poster had in mind.
 
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  • #6
I'm interested in the method that heat energy changes at an individual level. We can measure the heat output of an internal combustion engine, but how do the changes occur? I'm sure there is a chemical answer to this, but what would be the answer if we sum all individual atoms energies?

Maybe the answer would be in a statistical mechanics book, but I found it interesting how a enclosed space like an internal combustion engine can represent a change in atom energy.
 
  • #7
obbeel said:
Maybe the answer would be in a statistical mechanics book,
Yes, that is where you’ll find it. And there’s no quantum physics involved, it’s all bulk properties of matter.

This thread is closed.
 

FAQ: What role does Quantum Mechanics play in a internal combustion engine?

What role does Quantum Mechanics play in the ignition process of an internal combustion engine?

Quantum Mechanics plays a role in the ignition process at the molecular level, particularly in the behavior of electrons and chemical bonds during combustion. The quantum mechanical principles govern how fuel molecules interact with oxygen molecules, leading to the breaking and forming of chemical bonds that release energy.

How does Quantum Mechanics influence the efficiency of an internal combustion engine?

The principles of Quantum Mechanics influence the efficiency of an internal combustion engine by dictating the energy states and transition probabilities of molecules involved in combustion. Understanding these principles helps in optimizing fuel formulations and combustion processes, potentially leading to more efficient energy release and reduced waste.

Can Quantum Mechanics help in reducing emissions from internal combustion engines?

Yes, Quantum Mechanics can help in reducing emissions by providing insights into the molecular interactions that produce pollutants. By understanding these interactions at a quantum level, scientists can develop better catalysts and fuel additives that minimize the formation of harmful by-products like NOx and CO.

What is the significance of Quantum Tunneling in the operation of an internal combustion engine?

Quantum Tunneling can have a minor but significant role in the operation of an internal combustion engine, particularly in the initiation of chemical reactions at lower temperatures than would be expected classically. This can influence the ignition timing and combustion efficiency, especially under varying operating conditions.

How does Quantum Mechanics contribute to the development of advanced materials for internal combustion engines?

Quantum Mechanics contributes to the development of advanced materials by providing a fundamental understanding of the electronic structure and properties of materials. This knowledge is crucial for designing materials that can withstand high temperatures, pressures, and corrosive environments found in internal combustion engines, thereby improving their durability and performance.

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