Automotive Design and Simulation of a four stroke Otto engine

AI Thread Summary
The discussion focuses on designing and simulating a four-stroke Otto engine using CAD software, specifically NX12, and analyzing it with FEA and CFD simulations. The user seeks comprehensive tutorials for this process, emphasizing the learning aspect rather than practical application. Suggestions include exploring existing engine design simulators for insights and considering the complexities involved in engine components such as combustion chambers and valve timing. Safety concerns are raised regarding the feasibility of building a physical engine without expert guidance. The user clarifies their intent to create a detailed 3D CAD model of the engine.
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Hello,

I am looking for resources that show you how to design an simulate and engine from scratch.

I want to design a complete engine using CAD. Afterwards I would like to analyze the engine using FEA and CFD (Heat transfer, fluid flow etc.) simulations.
This is all for learning purposes. I will be using NX12 and probably ANSYS for CFD, although the package shouldn't matter to much.
Is there basically a tutorial on this whole process?

Thanks
 
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Sounds like a large project. I can't offer much in the way of software design, but it may be worthwhile looking at existing engine design simulators to get an idea about what is out there before you try and develop one yourself. Some of these have a cost, but have a free demo to look at, or have a lower functioning free version. There are a lot of areas in an engine where complicated things occur, and you may find that FEA/CFD is more helpful in certain areas. Combustion chamber/piston design, valve/ignition timing events, valvetrain harmonics, intake plenum effects, etc., have levels of complexity that can be studied for years, depending on how detailed your analysis gets.

http://www.performancetrends.com/Engine-Simulation.htm
http://www.quarterjr.com/
http://www.motionsoftware.com/
http://www.enginebuilderprofessional.com/
 
Are you actually going to build this thing, or is it just an academic exercise? If you are actually going to build it, the safety considerations are enormous and daunting. Please don't consider building it yourself without on site expertise to hold your hand at every juncture.
 
I think we need to clarify what you want to achieve and what is feasible.

Do you want to design an engine, or do you want to draw a picture of one?
3D CAD is essentially an elaborate drawing.
 
I want to "3D CAD" an engine, firstly.
 
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