The discussion focuses on the differences between the Otto and Diesel cycles, specifically regarding heat addition methods. In the Otto cycle, heat is added to the air-fuel mixture at constant volume, while in the Diesel cycle, heat is added at constant pressure, which involves the concept of cutoff ratios. The historical context of Rudolf Diesel's initial use of coal powder as fuel, which led to cylinder explosions, is also highlighted, emphasizing the transition to petroleum oil for safer combustion. The implications of these differences are critical for understanding engine efficiency and performance.
PREREQUISITESEngineers, automotive students, and anyone interested in the principles of internal combustion engines and their thermodynamic cycles.
There are pros and cons to each. have you done a google search for this question?venkata said:In case of Otto cycle we consider that heat is immediately added to air fuel mixture(i.e constant volume heat addition) but in case of diesel cycle we consider heat addition at constant pressure and we also talk of cutoff ratios.why so??
http://charming.awardspace.com/otto_diesel/otto_diesel.htmlvenkata said:In case of Otto cycle we consider that heat is immediately added to air fuel mixture(i.e constant volume heat addition) but in case of diesel cycle we consider heat addition at constant pressure and we also talk of cutoff ratios.why so??