Automotive Technology: Principles, Diagnosis, And Service (6th Edition) (halderman Automotive Series)
6th Edition
ISBN: 9780135257272
Author: James D. Halderman
Publisher: PEARSON
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Textbook Question
Chapter 26, Problem 2RQ
Describe how to perform a compression test and how to determine what is wrong with an engine based on a compression test result.
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chanism shown in figure below, the crank OA rotates at 60 RPM counterclockwise. The
velocity diagram is also drawn to scale (take dimensions from space diagram). Knowing that QCD is rigid
plate, determine:
a. Linear acceleration of slider at B,
b.
Angular acceleration of the links AC, plate CQD, and BD.
D
Space Diagram
Scale 1:10
A
ES
a
o,p,g
b
Velocity Diagram
Scale 50 mm/(m/s)
d
A thick closed cylinder, 100 mm inner diameter and 200 mm outer diameter is subjected
to an internal pressure of 230 MPa and outer pressure of 70 MPa. Modulus of elasticity,
E=200 GPa. and Poisson's ratio is 0.3, determine:
i)
The maximum hoop stress
ii)
The maximum shear stress
iii)
The new dimension of the outer diameter due to these inner and outer pressures.
A
ә
レ
shaft fitted with a flywheel rotates at 300 rpm. and drives a machine. The torque
required to drive the machine varies in a cyclic manner over a period of 2 revolutions. The torque drops
from 20,000 Nm to 10,000 Nm uniformly during 90 degrees and remains constant for the following 180
degrees. It then rises uniformly to 35,000 Nm during the next 225 degrees and after that it drops to
20,000 in a uniform manner for 225 degrees, the cycle being repeated thereafter.
Determine the power required to drive the machine and percentage fluctuation in speed, if the driving
torque applied to the shaft is constant and the mass of the flywheel is 12 tonnes with radius of gyration of
500 mm. What is the maximum angular acceleration of the flywheel.
35,000
TNm
20,000
10,000
495
Crank angle 8 degrees
270
0
90
か
---20125
750 X 2.01
44
720
s
Chapter 26 Solutions
Automotive Technology: Principles, Diagnosis, And Service (6th Edition) (halderman Automotive Series)
Ch. 26 - Describe the visual checks that should be...Ch. 26 - Describe how to perform a compression test and how...Ch. 26 - Describe the cylinder leakage test.Ch. 26 - Describe how a vacuum gauge would indicate if the...Ch. 26 - Describe the test procedure for determining if the...Ch. 26 - Which of these smoke colors indicates excessive...Ch. 26 - Two technicians are discussing oil leaks....Ch. 26 - Which of the following is the least likely to...Ch. 26 - Engine oil pressure at 3500 RPM should be at least...Ch. 26 - A good engine should produce how much compression...
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