Automotive Technology
Automotive Technology
7th Edition
ISBN: 9781337794213
Author: ERJAVEC, Jack.
Publisher: Cengage,
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Chapter 29, Problem 1TF

True or False? Fuel pressure typically is at its highest level when vacuum is applied to the pressure regulator.

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4-81 The corner shown in Figure P4-81 is initially uniform at 300°C and then suddenly exposed to a convection environment at 50°C with h 60 W/m². °C. Assume the = 2 solid has the properties of fireclay brick. Examine nodes 1, 2, 3, 4, and 5 and deter- mine the maximum time increment which may be used for a transient numerical calculation. Figure P4-81 1 2 3 4 1 cm 5 6 1 cm 2 cm h, T + 2 cm
Auto Controls   A union feedback control system has the following open loop transfer function where k>0 is a variable proportional gain   i. for K = 1 , derive the exact magnitude and phase expressions of G(jw).   ii) for K = 1 , identify the gaincross-over frequency (Wgc) [where IG(jo))| 1] and phase cross-overfrequency [where <G(jw) = - 180]. You can use MATLAB command "margin" to obtain there quantities.  iii) Calculate gain margin (in dB) and phase margin (in degrees) ·State whether the closed-loop is stable for K = 1 and briefly justify your answer based on the margin . (Gain marginPhase margin)   iv. what happens to the gain margin and Phase margin when you increase the value of K?you  You can use for loop in MATLAB to check that.Helpful matlab commands : if, bode, margin, rlocus   NO COPIED SOLUTIONS
Auto Controls   Hand sketch the root Focus of the following transfer function   How many asymptotes are there ?what are the angles of the asymptotes?Does the system remain stable for all values of K    NO COPIED SOLUTIONS
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