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

Click For 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.
lee123456789
Messages
90
Reaction score
5
Homework Statement
writie about engines
Relevant Equations
none
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
 
Physics news on Phys.org
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.
 

Thread 'AM-AM and AM-PM graph generation in LTSpice'

Greetings to all, I am writing with a question regarding graph generation in LTSpice. I am using LTSpice XVII and am trying to plot AM-AM and AM-PM characterization for a power amplifier, but I haven't been successful yet, likely due to my lack of practice with this specific analysis. I have been using a square wave input at 8.2 MHz as the voltage waveform for my power amplifier. It is said that for a switching amplifier like Class-D, the AM-AM / AM-PM (amplitude-to-amplitude and...
View full post »
Thread 'How do I determine the resistance for RLC low pass filter?'

Thread 'How do I determine the resistance for RLC low pass filter?'

Hi, I am trying to build a RLC low pass filter that atenuates the frequency below 4500 Hz. However, I have encountered some problem when choosing the correct R to work with. Here is the Circuit Here is the original sound. Here is my code in Matlab function Vout = myFilterCircuit(Vin,h) n_V = length(Vin); f_7 = 4470;; % Undesired frequency h_7 = h; % delta time % These are for the constant and initialization of the variables t_7 = 0:h_7:(n_V-1)*h_7; % This is the independent variable...
View full post »

Similar threads

Engineering Reviewing Efficiency of Otto & Diesel Cycle Heat Engines
Replies
8
Views
3K
B Laws in Otto, Diesel, etc. cycles
Replies
12
Views
2K
Modelling Diesel Cycle in Excel.
Replies
3
Views
5K
Dual cycle-Diesel Engine question
Replies
1
Views
5K
Automotive Ozone Enhanced Combustion of Water/Diesel Emulsion in CI Engines
Replies
6
Views
2K
Otto Cycle - calculate the net work per cycle in Btu
Replies
7
Views
6K
Expansion in non-adiabatic Otto / Diesel cycles
Replies
13
Views
2K
Specific heat in for the Otto cycle
Replies
1
Views
2K
I Non-adiabatic expansion in Diesel and Otto cycles
Replies
1
Views
859
Why are gas turbine engines not used in cars? Is what I think correct?
Replies
19
Views
2K