Automotive Technology
7th Edition
ISBN: 9781337794213
Author: ERJAVEC, Jack.
Publisher: Cengage,
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Textbook Question
Chapter 24, Problem 4SA
Explain the trip and drive cycle in an OBD II system.
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Question 1
A car manufacturing company is in the process of testing a new vehicular transmission system. Figure 1
shows an outline of the system arrangement. As usual, the power generated by the engine is smoothed out
by a flywheel at the end of the camshaft. A multi-plate clutch is affixed to the flywheel and transfers power
to the main shaft via the layshaft.
Engine
23
4 5
R
Main
Shaft
Clutch & flywheel
Layshaft
Figure 1: Schematic of transmission arrangement
The output torque from the engine is given by the expression: 510 + 46 sin 20 Nm, per rotational cycle and
spins at an average of 4000 rpm. The attached flywheel has a coefficient of speed fluctuation of 0.15.
Assuming a constant load torque requirement, determine:
a) The maximum fluctuation of energy and the average power output at the flywheel face.
b) The mass moment of inertia of the flywheel.
c) The maximum and minimum speeds of the flywheel.
Chapter 24 Solutions
Automotive Technology
Ch. 24 - Describe the difference between an open- and a...Ch. 24 - Explain the use and importance of system strategy...Ch. 24 - Describe an OBD II warm-up cycle.Ch. 24 - Explain the trip and drive cycle in an OBD II...Ch. 24 - Describe how engine misfire is detected in an OBD...Ch. 24 - Describe the purpose of having both upstream and...Ch. 24 - Briefly describe the monitors in an OBD II system.Ch. 24 - Type B engine misfires are excessive if the...Ch. 24 - The monitor system checks the action of the can...Ch. 24 - The monitor system has a(n) and test to check the...
Ch. 24 - The fuel monitor checks fuel trim and fuel trim.Ch. 24 - Which sensor is used for misfire monitoring on OBD...Ch. 24 - Which of the following statements is not true?...Ch. 24 - A computer is capable of doing all of the...Ch. 24 - Which of the following memory circuits is used to...Ch. 24 - Technician A says that the oxygen sensor provides...Ch. 24 - While discussing OBD II systems: Technician A says...Ch. 24 - While discussing the catalyst efficiency monitor:...Ch. 24 - While discussing monitoring systems: Technician A...Ch. 24 - While discussing the comprehensive monitoring...Ch. 24 - Prob. 6ASRQCh. 24 - While discussing diagnostic procedures: Technician...Ch. 24 - Technician A says that the enable criteria are the...Ch. 24 - While discussing PCM monitor tests: Technician A...Ch. 24 - While discussing the misfire monitor: Technician A...
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