AUTOMOTIVE TECHNOLOGY (W/MINDTAP)
7th Edition
ISBN: 9780357096772
Author: ERJAVEC
Publisher: CENGAGE L
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Textbook Question
Chapter 37, Problem 10ASRQ
Technician A says that all manual transmission vehicles have at least one pilot bearing or bushing for the input shaft. Technician B says that the pressure plate always rotates with the input shaft when the engine is running. ‘Who is correct?
a. Technician A only
b. Technician B only
c. Both A and B
d. Neither A nor B
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3
N2=28
P(diametral pitch)=8 for all gears
Coupled to 25 hp motor
N3=34
Full depth spur gears with pressure angle=20°
N₂=2000 rpm
(1) Compute the circular pitch, the center-to-center distance, and base circle radii.
(2) Draw the free body diagram of gear 3 and show all the forces and the torque.
(3) In mounting gears, the center-to-center distance was reduced by 0.1 inch.
Calculate the new values of center-to-center distance, pressure angle, base circle radii,
and pitch circle diameters.
(4)What is the new tangential and radial forces for gear 3?
(5) Under the new center to center distance, is the contact ratio (mc) increasing or
decreasing?
2. A flat belt drive consists of two 4-ft diameter cast-iron pulleys spaced 16 ft apart.
A power of 60 hp is transmitted by a pulley whose speed is 380 rev/min. Use a
service factor (Ks) pf 1.1 and a design factor 1.0. The width of the polyamide A-3
belt is 6 in. Use CD=1. Answer the following questions.
(1) What is the total length of the belt according to the given geometry?
(2) Find the centrifugal force (Fc) applied to the belt.
(3) What is the transmitted torque through the pulley system given 60hp?
(4) Using the allowable tension, find the force (F₁) on the tight side. What is the
tension at the loose side (F2) and the initial tension (F.)?
(5) Using the forces, estimate the developed friction coefficient (f)
(6) Based on the forces and the given rotational speed, rate the pulley set. In other
words, what is the horse power that can be transmitted by the pulley system?
(7) To reduce the applied tension on the tight side, the friction coefficient is
increased to 0.75. Find out the…
The tooth numbers for the gear train illustrated are N₂ = 24, N3 = 18, №4 = 30, №6 = 36, and
N₁ = 54. Gear 7 is fixed. If shaft b is turned through 5 revolutions, how many turns will shaft a make?
a
5
[6]
b
Chapter 37 Solutions
AUTOMOTIVE TECHNOLOGY (W/MINDTAP)
Ch. 37 - What is another name for the diaphragm spring?Ch. 37 - What is used to measure clutch pedal play?Ch. 37 - The pressure plate moves away from the flywheel...Ch. 37 - Name three types of clutch linkages.Ch. 37 - True or False? If the fluid reservoir for a...Ch. 37 - True or False? Both the clutch and the brake...Ch. 37 - The clutch, or friction, disc is connected to the....Ch. 37 - Torsional coil springs in the clutch disc_____. a....Ch. 37 - Which of the following is probably not the cause...Ch. 37 - When the clutch pedal is released on a hydraulic...
Ch. 37 - When the clutch is disengaged, the power flow...Ch. 37 - Insufficient clutch pedal clearance results...Ch. 37 - Before making a clutch adjustment, it is necessary...Ch. 37 - The surface of the pressure plate contacts the. a....Ch. 37 - Which of the following would not cause clutch...Ch. 37 - Technician A says that clutch slippage is most...Ch. 37 - While discussing ways to determine if a pilot...Ch. 37 - While discussing the different types of pressure...Ch. 37 - While discussing the purpose of a clutch pressure...Ch. 37 - Technician A says that an oil-soaked clutch disc...Ch. 37 - While discussing different abnormal clutch noises:...Ch. 37 - Technician A says that incorrect clutch adjustment...Ch. 37 - While discussing the cause of a pulsating clutch...Ch. 37 - Technician A says that if the hydraulic clutch...Ch. 37 - Technician A says that all manual transmission...
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