2011 Final Practice ME125BP

2011 Final Practice - ME125 Practice Exam Questions 1 How would you choose/design a tire to increase the cornering coefficient e V” Hit-J F t o

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Unformatted text preview: ME125 Practice Exam Questions 1. How would you choose/design a tire to increase the cornering coefficient? e. V” Hit-J F t o us “in 2. What are some pros and cons of increasing the hysteresis in tire rubber? w» imQ‘ronoii MCI—£10“ 9““ iCfl; €P\’Q\l «— Wx {f wet/25.92% htfi Ck,th high. igFi‘Qfii 3. How is a cam profile modified to accommodate high RPM operation? l f" 3.. \ t“ z 'i v a. V”. _ i em- ‘a‘ ‘u t, ill ’9')! \ - ‘N‘ a w... I: t? t‘xcfi. em- if.“ * ‘r‘t'tm'l \Cfl‘" ‘“ A u . xi . , ’ A __ q o‘r’m w. «’r“-=1;~7’*13\“@ ““V'iO-‘wxl 4. Roughly how much rotational kinetic energy is required to roll a car in a tripped \ i .. WHOVBY? ’10 Si” £6“me c.) +w’f3FJf no) rm POT-ET! "M “gay I '.\ ' i ' is ‘ C3 liar/left e no gal/100‘- Ci iaxwk \H’i’ m i if; a” 0;? area-30 C—fmf‘i‘e-cg W St“ ‘Jt'L-tm it“ (24 Mi W” “to “ M m“ 3“ ’ 5. You are test driver attempting to roll a vehicle having a roll bar. It has a 2 Hz roll resonance. How much time should there be between the left and right turns of the steering wheel in your J turn. Ma's-fa”? i ‘t/ML germn cl 6. In a 4-whee1 steer vehicle, the front and rear wheels share the steering effort equally. As a function of steer angle, what is the turning radius? (use small angle approximations) 7A steering systems has stiffness Kss (N—m/deg), tire radius r, caster angle v radians, and no pneumatic trail. What is the contribution to understeer gradient due to the steering compliance? er? mm. is 53% ., % i ,e‘ w Toqué 3"” x‘tfi‘v fig : QWMIL Wes 355,0 if. W-Q‘rv a i} R W Vng W W 8. Find the front roil center for the front suspension below. 1 . r/fi V I. ,.~: " ,, we «7?ny 9. What is the significance of the anti-squat line having slope h/L? Is there a significance to increasing the slope to Zh/L? . ‘ «ii-M mxwi "a . ....\ ‘ 3 e5 i o 1’ L“ i 'e - IflQ (La Vie QMA'VCWQ {Q\ k “9,2!” {A +4.5“ men-qr Comri'gadn Farmhle \ ofi) 5'3 hé Vuqu 1 at? maxi} Wig; ‘ 51’53ytvazr’=y'efi..%3‘c§; 0“” vow “isms-em i W «e- 0 in 5 ' fligm ea,uamwfie he 3 “0 K iv Ewe a ,. ‘ FM 55‘ \u “r '3‘“ ' stoic-Lg 2% «Arm (TOMA (j: (E) 3-2 :33 LA (‘3‘: 10. For the following suspension model with no tire mass or tire compliance, find the transfer function from Zr to Z. méscs«+%%’ Q Jag (it A (WifilJr C3+m32 “’1 ...
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This note was uploaded on 12/29/2011 for the course ME 125 taught by Professor Pennathur during the Fall '08 term at UCSB.

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2011 Final Practice - ME125 Practice Exam Questions 1 How would you choose/design a tire to increase the cornering coefficient e V” Hit-J F t o

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