Question

The turning moment diagram for a multi cylinder IC engine is drawn to the following scales

1 cm = 15 crank angle

1 cm = 3 k Nm

During one revolution of the crank the areas with reference to the mean torque

2

line are 3.52, (-) 3.77, 3.62, (-) 4.35, 4.40 and (–) 3.42 cm . Draw the turning

moment diagram and determine mass moment of inertia to keep the fluctuation of mean speed within  3% with reference to mean speed. Engine speed is 200 rpm

The turning moment diagram for a multi cylinder IC engine is drawn to the following scales 1 cm = 15° crank angle 1 cm = 3 k Nm During one revolution of the crank the areas with reference to the mean torque line are 3.52, (-) 3.77, 3.62, (-) 4.35, 4.40 and (-) 3.42 cm². Draw the turning moment diagram and determine mass moment of inertia to keep the fluctuation of mean speed within + 3% with reference to mean speed. Engine speed is 200 rpm.

Answer 1

Page No. Date : A = 3.52cm2 , Az = -3.77cm, Az= 3.62 cm, Ay= -4.35 cm2 As = 4.40 cm?, Ar= - 3.420602 Moment - mean Turning period EA - EZ Ep = EUA, = Et 3.52 (Max) Epo E+A+Az E -0.25 ED= E+ A+ Az+Az = Et 3.35 Ex Et A+Azt Az +Ay - F - 0.98 (mos) Ep = E + ALLAZA tArt AS E+ 3.42 EGE ETA, + A2 + Az + Ay + As + A 2 E AE = Emox - Emin – Epe EG = 4.5 And A E = I was 4 w = 2IN - 2XTX 200 60 60 60: 20.94 rad/s. Csat 3% = 0.06 AE = 4.5x3 x 15 x IT, = 3.53 KJS 180 E = I w2Cs 3.53X103= I x 20.94)2 x 0.06 1 = 134.33 kogem?