1 ↓ 100 a 250 Τ I < Figure 2: Crank-connecting rod-piston mechanism (adapted from Hibbeler, 2002) In a multi-cylinder automobile internal combustion engine, crank AB is rotating with an angular velocity a (see Figure 2). The length of crank AB and connecting rod BC are 100 mm and 250 mm respectively. In internal combustion engines the motion between these two elements represents an important design parameter. c) Determine the angular velocity a of the crank AB for the crank-rod-piston mechanism if the system is released from rest with = 60° to = 20°. Also, determine the velocity of point C at the same instant. The masses of the connecting rod BC and the crank AB are 1.8 kg and 1.2 kg respectively. Both AB and BC can be considered as uniform slender rods. See Figure 2 for the length of crank and connecting rods. Use work and energy principle (conservation of energy principle). d) A 4 kg flywheel is attached with an automobile engine crankshaft. It has a radius of gyration about its shaft axis of = 0.2 m. If it is subjected to the torque M=10(1-e) Nm, where t is in seconds and the flywheel is at rest at time + = 0s, determine its angular velocity wat time=3s. Use impulse and momentum principle.

Refrigeration and Air Conditioning Technology (MindTap Course List)
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Chapter1: Heat, Temperature, And Pressure
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1
↓
100 a
250
Τ
I
<
Figure 2: Crank-connecting rod-piston mechanism
(adapted from Hibbeler, 2002)
In a multi-cylinder automobile internal combustion engine, crank AB is rotating with
an angular velocity a (see Figure 2). The length of crank AB and connecting rod BC
are 100 mm and 250 mm respectively. In internal combustion engines the motion
between these two elements represents an important design parameter.
c) Determine the angular velocity a of the crank AB for the crank-rod-piston
mechanism if the system is released from rest with = 60° to = 20°. Also,
determine the velocity of point C at the same instant. The masses of the
connecting rod BC and the crank AB are 1.8 kg and 1.2 kg respectively. Both AB
and BC can be considered as uniform slender rods. See Figure 2 for the length
of crank and connecting rods. Use work and energy principle (conservation of
energy principle).
d) A 4 kg flywheel is attached with an automobile engine crankshaft. It has a
radius of gyration about its shaft axis of = 0.2 m. If it is subjected to the torque
M=10(1-e) Nm, where t is in seconds and the flywheel is at rest at time + =
0s, determine its angular velocity wat time=3s. Use impulse and momentum
principle.
Transcribed Image Text:1 ↓ 100 a 250 Τ I < Figure 2: Crank-connecting rod-piston mechanism (adapted from Hibbeler, 2002) In a multi-cylinder automobile internal combustion engine, crank AB is rotating with an angular velocity a (see Figure 2). The length of crank AB and connecting rod BC are 100 mm and 250 mm respectively. In internal combustion engines the motion between these two elements represents an important design parameter. c) Determine the angular velocity a of the crank AB for the crank-rod-piston mechanism if the system is released from rest with = 60° to = 20°. Also, determine the velocity of point C at the same instant. The masses of the connecting rod BC and the crank AB are 1.8 kg and 1.2 kg respectively. Both AB and BC can be considered as uniform slender rods. See Figure 2 for the length of crank and connecting rods. Use work and energy principle (conservation of energy principle). d) A 4 kg flywheel is attached with an automobile engine crankshaft. It has a radius of gyration about its shaft axis of = 0.2 m. If it is subjected to the torque M=10(1-e) Nm, where t is in seconds and the flywheel is at rest at time + = 0s, determine its angular velocity wat time=3s. Use impulse and momentum principle.
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