Download GTU BE/B.Tech 2017 Winter 7th Sem New 2170203 Vehicle Dynamics Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VII (NEW) EXAMINATION — WINTER 2017

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Subject Code: 2170203 Date: 02/11/2017
Subject Name: Vehicle Dynamics
Time: 10:30 AM TO 01:00 PM Total Marks: 70

Instructions:

1. Attempt all questions.

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2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

Q.1 (a) Explain Lumped mass of Vehicle. [03]
(b) Draw and explain vehicle Fixed Coordinate system. [04]
(c) Draw and Explain various Aerodynamic Forces and Moments acting on the vehicle. [07]

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OR

Q.1 (a) Explain Pressure distribution around the vehicle [03]
(b) List the various shape of vehicles and give the value of Aerodynamic Drag coefficient for each shape of vehicle. [04]
(c) Explain empirical and analytical methods for understanding of vehicle dynamics performance, along with its benefits and limitations. [07]

Q.2 (a) What is braking coefficient? Explain the parameters which affect braking coefficients [03]

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(b) Give the name of major elements of tyre and their suitable materials. [04]
(c) Discuss in details various factors affecting on tyre life. [07]

OR

Q.2 (a) Explain Camber thrust. Write a short note on Cornering force produced by a vehicle tire. [03]
(b) Construction of Bias & Radial tyre with the help of neat sketch. [04]

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(c) Define ride and explain ride dynamic system. [07]

Q.3 (a) Draw clear sketch of Tyre axis system and explain the details. [03]
(b) Explain Difference between dependent and independent suspension system [04]
(c) Draw and explain antdive suspension geometry [07]

OR

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Q.3 (a) Explain Active suspension and Roll centre-analysis. [03]
(b) Explain Anti squat suspension geometry. [04]
(c) Explain MacPherson Strut Suspension system. [07]

Q.4 (a) Draw quarter car model of vehicle representing passive suspension system. Obtain the mathematical model for the same in steady state vibration for sprung and unsprung mass. [03]
(b) Differentiate between Dayis steering and Ackerman steering mechanism. [04]

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(c) Define steering geometry error. Explain the effect of geometry error on dynamics of vehicle. [07]

OR

Q.4 (a) Explain the following turning response properties: [03]

• Under steer gradient.

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• Neutral steer.
• Under steer.
• Over steer.
• Characteristic speed and Critical speed

(b) What is the important of rollover? List types of rollover of the vehicle. [04]

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(c) What is quasistatic rollover of a suspended vehicle? Draw and explain rollreaction on vehicle. [07]

Q.5 (a) Explain various resistances to motion of a vehicle and explain their effect on performance of a vehicle. [07]

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