Engineering Otto and Diesel cycles: Which PV diagram is for SI and CI?

AI Thread Summary
The discussion clarifies the PV diagrams for different engine types, identifying the left diagram as representing Compression Ignition (CI), specifically Diesel engines, and the right diagram as representing Spark Ignition (SI), specifically Otto engines. Participants confirm that CI stands for Compression Ignition and SI stands for Spark Ignition. The confusion surrounding the diagrams is addressed, providing clarity on their respective representations. This distinction is crucial for understanding engine operation and thermodynamic cycles. Accurate identification of these diagrams aids in the study of engine mechanics.
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Homework Statement
writie about engines
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Writing about Engines and just muddled up diagrams and confused now. Which PV diagrams is for Compression Ignition and which one for Compression Ignition.

1623496970223.png
1623496991563.png

I think one on left is CI and right SI.

Cheers
 
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What does SI stand for?
 
It may be Spark Ignition
 
The first picture is Diesel (compression ignition) and the 2nd picture is Otto (spark ignition).
 
Ci compression ignition. Si spark ignition.
 
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