Combution, energy and pressure relation

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Discussion Overview

The discussion revolves around the relationship between combustion, energy, and pressure in the context of a car simulation. Participants explore the variables affecting engine performance, including fuel type, pressure, air quantity, and temperature, while seeking formulas to calculate force and energy release.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • One participant inquires about the possibility of calculating the force generated by burning fuel and the corresponding energy release, considering various factors such as pressure, fuel amount, air quantity, and temperature.
  • Another participant suggests starting with the idle temperature of the engine and calculating the increase in temperature based on fuel and water content, although the explanation is somewhat unclear.
  • A later reply reflects on the complexity of the situation, acknowledging that the amount of fuel is not fixed and is controlled by the car's onboard computer, leading to uncertainty about the variables involved.
  • One participant notes that some operations may cancel each other out and recommends beginning calculations with the minimum amount of fuel in relation to temperature.

Areas of Agreement / Disagreement

Participants express varying levels of understanding and propose different approaches to the problem, indicating that there is no consensus on a specific method or formula to address the questions raised.

Contextual Notes

There are limitations in the discussion regarding the assumptions about engine operation, the dependence on specific definitions of variables, and the lack of clear mathematical steps to derive the desired calculations.

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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