What is the difference between Otto engine and Carnot engine

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The key difference between the Otto engine and the Carnot engine lies in their thermodynamic processes, with the Otto engine being an irreversible cycle and the Carnot engine being reversible. The maximum efficiency of the Carnot engine is higher than that of the Otto engine, as it operates between two temperature reservoirs. The PV diagrams for both engines exhibit different shapes due to their distinct processes; the Otto cycle involves compression and expansion strokes, while the Carnot cycle consists of isothermal and adiabatic processes. Understanding these differences is crucial for analyzing engine performance and efficiency. Overall, the Carnot engine represents the ideal efficiency benchmark, while the Otto engine is a practical application in internal combustion engines.
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What is the key difference between Otto engine and Carnot engine?
Other than it is reversible or not, it seems to me they are so similar.
Thanks.
 
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Have you looked at a PV diagram for both? What is the maximum efficiency of both cycles?
 
efficiency is max for carnot engine...
the pv diagram looks a little bit different shape.
however, why?
thanks
 
Thread 'Can somebody explain this: Planck's Law in action'

Thread 'Can somebody explain this: Planck's Law in action'

Plotted is the Irradiance over Wavelength. Please check for logarithmic scaling. As you can see, there are 4 curves. Blue AM 0 as measured yellow Planck for 5777 K green Planck for, 5777 K after free space expansion red Planck for 1.000.000 K To me the idea of a gamma-Ray-source on earth, below the magnetic field, which protects life on earth from solar radiation, in an intensity, which is way way way outer hand, makes no sense to me. If they really get these high temperatures realized in...
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