HW_2%20Solutions - CE 108 Homework #2 Solutions 1....

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CE 108 Homework #2 Solutions 1. Calculate and plot needed engine power output for a 1995 Ford Taurus under different driving conditions. Calculate resistive force for each scenario: The first term on the right hand side of the equation can be dropped because there is no acceleration in this problem. Theta can be calculated using the roadway grade: Engine power output is calculated using the resistive force, velocity, and transmission efficiency. Accessory load is ignored in this problem. (a) Cruise on level Ground Velocity Velocity Hill-Climbing Res Rolling Res Wind Res Fres Pb Pb km/hr m/s N N N N W kW 70 19 0 137 159 296 6385 6.4 80 22 0 137 207 344 8497 8.5 90 25 0 137 262 399 11089 11.1 100 28 0 137 324 461 14220 14.2 110 31 0 137 392 529 17952 18.0 120 33 0 137 466 603 22343 22.3 130 36 0 137 547 684 27453 27.5
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(b) Cruise on 4% uphill grade Velocity Velocity Hill-Climbing Res Rolling Res Wind Res Fres Pb Pb km/hr m/s N N N N W kW 70 19 610 137 159 906 19569 19.6 80 22 610 137 207 954 23565 23.6 90 25 610 137 262 1009 28040 28.0 100 28 610
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HW_2%20Solutions - CE 108 Homework #2 Solutions 1....

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