EBK AUTOMOTIVE TECHNOLOGY
5th Edition
ISBN: 9780100659841
Author: Halderman
Publisher: YUZU
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Textbook Question
Chapter 32, Problem 10CQ
Hydraulic lifters or hydraulic lash adjusters (HLA) may not bleed down property and cause an engine to miss if ___________.
- a. the engine oil is one quart low
- b. the wrong API-rated engine oil is used
- c. the wrong SAE-rated engine oil is used
- d. both a and b
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Question 1
You are working as an engineer in a bearing systems design company. The flow of
lubricant inside a hydrodynamic bearing (µ = 0.001 kg m¯¹ s¯¹) can be approximated
as a parallel, steady, two-dimensional, incompressible flow between two parallel plates.
The top plate, representing the moving part of the bearing, travels at a constant speed,
U, while the bottom plate remains stationary (Figure Q1). The plates are separated by
a distance of 2h = 1 cm and are W = 20 cm wide. Their length is L = 10 cm. By
applying the above approximations to the Navier-Stokes equations and assuming that
end effects can be neglected, the horizontal velocity profile can be shown to be
1 dP
u(y)
=
2μ dx
-y² + Ay + B
y= +h
Ꮖ
2h=1 cm
1
x1
y = −h
moving plate
stationary plate
2
X2
L = 10 cm
Figure Q1: Flow in a hydrodynamic bearing. The plates extend a width, W = 20 cm,
into the page.
(a) By considering the appropriate boundary conditions, show that the constants take
the following forms:
U
U
1 dP
A =…
Question 2
You are an engineer working in the propulsion team for a supersonic civil transport
aircraft driven by a turbojet engine, where you have oversight of the design for the
engine intake and the exhaust nozzle, indicated in Figure Q2a. The turbojet engine can
operate when provided with air flow in the Mach number range, 0.60 to 0.80. You are
asked to analyse a condition where the aircraft is flying at 472 m/s at an altitude of
14,000 m. For all parts of the question, you can assume that the flow path of air through
the engine has a circular cross section.
(a)
← intake
normal
shock
472 m/s
A B
(b)
50 m/s
H
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B
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E
F
exit to
atmosphere
diameter: DE = 0.30 m
E
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a) When the aircraft is at an altitude of 14,000 m, use the International Standard
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ture. Thus show that the aircraft speed…
Chapter 32 Solutions
EBK AUTOMOTIVE TECHNOLOGY
Ch. 32 - Prob. 1RQCh. 32 - Prob. 2RQCh. 32 - Prob. 3RQCh. 32 - Prob. 4RQCh. 32 - The camshaft makes __________ for every revolution...Ch. 32 - Prob. 2CQCh. 32 - If lift and duration remain constant and the lobe...Ch. 32 - Which timing chain type is also called a silent...Ch. 32 - Two technicians are discussing variable valve...Ch. 32 - Many technicians always use new pushrods because...
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