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Comparison on Otto and Diesel Cycle
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After coming across the otto cycle and diesel cycle, here, in this lesson Harshith elaborates comparison in between them. He explains in detail utilizing three illustrations with the help of ​TS diagram which will help you know how to find the efficient cycle among diesel and otto cycles.

Harshit Aggarwal
Cleared UPSC ESE twice with Rank 63 and 90 in mechanical engg. Got 99 percentile in GATE. Cracked ONGC, BHEL,ISRO, SAIL, GAIL successfully

U
Unacademy user
sir in 2nd question why you have use ds = Cp ln(T2/T1) - R ln(P2/P1) instead of ds = n Cp ln(T2/T1) - R ln(P2/P1) i.e., why you not multipied the number of moles which is given in the question
confusing in compration of otto and diesel cycle on graph ..can you give a more detail explation on case 1 ...
ohh sorry..i understand it well..after watching again...thanks sir
once again an awesome course..thanks alot sir. u r the best educator regarding mechanical engineering in Unacademy.
add more lessons ???
thanks sir , add the subject topic as below student asked ....
  1. Understanding the Basics of I C Engine Course: Lesson 6 Comparison of Otto & Diesel Cycle Presented by : Harshit Aggarwal


  2. ABOUT ME Graduated from NIT Nagpur in 2008 . Cleared Indian Engineering Services (IES-UPSC) Exam . Got the offer letter from most of the Maharatna and Navratna Companies Cleared GATE Examm . Course fee: CONTRIBUTE Course fee: CONTRIBUTE . Follow me on Unacademy at: https://unacademy.in/user/harshit_aggarwal


  3. COMPARISON OF OTTO AND DIESEL CYCLE . CASE 1: Same compression ratio and heat addition CaseL: 3 1-2-3-4 Cotte -Mare.. rejection -2-3-4CDiese in diesel . For the same compression ratio and heat addition , heat rejection is more in diesel cycle. Hence, its efficiency is less than Otto Cycle


  4. . CASE 2: Same compression ratio and heat rejection Case 2: t=-as 1-2-3-4 Cotta 1-2-3-Diese) Excess addition in Otte Gyele 2. .For the same compression ratio and heat rejection, heat supply is more in Otto Cycle. Hence, its efficiency is more.


  5. CASE 3: Same maximum temperature and heat rejection. Case 3: excess hear addition in Diesel Cyele -- %- same 1-2-3-4 Cotto 1-23-4 CDiese Jp . For the same maximum temperature and heat rejection, heat supply is more in Diesel Cycle. Hence, its efficiency is more than Otto Cycle.