HW3_Solutions - ME 131: Vehicle Dynamics and Control Spring...

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Unformatted text preview: ME 131: Vehicle Dynamics and Control Spring Semester 2010 Department of Mechanical Engineering University of California at Berkeley GSI Andrew Gray Homework No. 3 Solutions Question 1: Load Transfer (a) Assume you have a rear-wheel drive car with a 50/50 weight distribution where 100% of the torque of the engine is delivered to the rear wheels. The tires on each wheel are the same. Making no other changes to the vehicle, if you lower its center of gravity will it accelerate from a dead stop faster, slower, or the same as the initial configuration? Why? (1 pt) Does this result depend on the initial weight distribution? (1 pt) It will accelerate slower. Lowering the CG reduces the load transfer, meaning less normal force is available at the rear wheels, and thus less accelerative force. No. For any rear wheel drive car more load transfer is better in acceleration. (b) Assume you have an all-wheel drive car with a 50/50 weight distribution where 50% of the torque of the engine is delivered to the front wheels and 50% of the torque is delivered to the rear wheels. The tires on each wheel are the same. Making no other changes to the vehicle, if you lower its center of gravity will it accelerate from a dead stop faster, slower, or the same as the initial configuration? Why? (1 pt) Does this result depend on the initial weight distribution?...
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HW3_Solutions - ME 131: Vehicle Dynamics and Control Spring...

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