Combution, energy and pressure relation

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SUMMARY

The discussion focuses on the relationship between combustion, energy, and pressure in the context of car simulation, specifically using diesel and gasoline as fuel sources. Key variables affecting force generation include pressure, fuel amount, air (O2) amount, and temperature. Participants emphasize the need for a formula to calculate the force produced and the engine temperature, suggesting that the engine's idle temperature is around 100 degrees Celsius. The conversation highlights the complexity of engine dynamics, including the role of the onboard computer in regulating fuel flow and airflow.

PREREQUISITES
  • Understanding of combustion principles and thermodynamics
  • Knowledge of engine mechanics and operation
  • Familiarity with pressure and temperature relationships in gases
  • Basic grasp of automotive electronic control systems
NEXT STEPS
  • Research the ideal gas law and its application in engine simulations
  • Learn about the role of turbochargers in increasing engine pressure
  • Investigate how onboard computers manage fuel injection and airflow
  • Explore thermodynamic equations for calculating energy release in combustion
USEFUL FOR

Automotive engineers, simulation developers, and enthusiasts interested in understanding the dynamics of combustion engines and optimizing performance in simulations.

Byonnem
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Hello guys,

I'm currently working on a car simulation just for fun, but I'm stuck...

The force to move a car is generated by burning fuel ( to be more percise, diesel or gasolin).
But there are more variables:
Pressure (i know this because of turbos and such)
amount of fuel
amount of air (or O2)
temperature

is there a formula to calculate the force created, or released energy?
If there is, can you calculate the temperature of the engine too?

Thanks for reading and I hope you can answer some of my questions :)
 
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Your question is very interesting! And there are many was to come apon a solution. first what is the normal temperature of the engine when it is idel (i english good) next, fint the increase in tempurature, this means taking temp of engine and making a inequality based on increase in fuel subtracted by the amount of h2o present in the engine.
 
DaveDem said:
Your question is very interesting! And there are many was to come apon a solution. first what is the normal temperature of the engine when it is idel (i english good) next, fint the increase in tempurature, this means taking temp of engine and making a inequality based on increase in fuel subtracted by the amount of h2o present in the engine.

i can't really follow you.
Let's taka a theoretical 100 degree celsius is the idle temperature.

I just realize my whole idea of how the engine works is wrong, the amount of fuel isn't fixed (like i thought) it's controlled by the boardcomputer. I'll have to find that out too.. The airflow is regulated by the Gaspadel (correct me if I'm wrong). If this all is true than I have to many variabels and not enough data to do any calculations..
 
but remember that some operations do cancel each other our, so start with the minimum amount of fuel as related to temp
 

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