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Otto Cycle: Detailed outline and Derivation of its Efficiency
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This lesson will help you obtain comprehensive knowledge on the process of otto cycle. As this lesson begins you'll be taught about the assumptions which are necessary to know before studying the concepts of IC engine cycles. Then, the educator elucidates otto cycle and explains its process using PV diagram and TS diagram. Finally, you'll also learn how you to ​derive the efficiency of the otto cycle.

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
thanku sir
in process 2-3 we add fuel in the system then how mR is constant mass in the system changes due to addition of mass of external fuel
1. Course:Understanding the Basics of I C Engine Lesson 2 Oto 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. AIR STANDARD CYCLES (IDEAL I C ENGINE CYCLE) . Assumptions Air is the working fluid and it is assumed as an ideal gas. 2. The specific heat remain constant 3. The working fluid does nof undergo any chemical change 4. The working fluid is of fixed mass 5. All the processes are reversible. 3 The working fluid does nat undergo any chemicalichange

4. OTTO CYCLE (CONSTANT VOLUME CYCLE) 3 3 2 OR 3-4 Reversible Adiabatic expansion .1-2: Reversible Adiabatic compression (Isentropic) 2-3 : Constant volume heat addition ( PV = mRT PV T ) . 4-1 : Constant volume heat rejection

5. EFFICIENCY OF OTTO CYCLE . 1-2 Reversible Adiabatic compression (Isentropic) 2-3 : Constant volume heat addition ( PV = mRT PV T ) 3-4 Reversible Adiabatic expansion . 4-1: Constant volume heat rejection -GA Ss L-2: Adiabatic Process f-1 ,T-

6. B-H: Adiabatic Process =(x) =(x) efficienc, T(increasi T (T Compression Tari x Compression rahio _ - 2

7. MEAN EFFECTIVE PRESSURE Mean EffechM.E.P It is an imaginary or hypothetical constant pressure during expansion which produces same work as that of actual cycle. M.E.P indicates net work output for a given swept volume. Greater the M.E.P greater is the work output same work dhence greater is th P,n= , fr a given swept volume w