The vehicle is equipped with an engine having torque-speed characteristics as shown in the following table. The gear ratios of the gearbox are: first, 4.03; second, 2.16; third, 1.37; and fourth, 1.0 The gear ratio of the drive axle is 3.54. The transmission efficiency is 88%. Estimate the maximum speed of the vehicle on level ground and on a grade of 25%, as determined by the tractive effort that the engine torque with the given transmission can provide, if the vehicle is rear-wheel-drive. Plot the vehicle thrust in various gears versus vehicle speed.

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Engine speed, rpm Engine torque, N.m 500 339 Engine Characteristics 1000 1750 2500 3000 3500 4000 4500 5000 379.7 406.8 393.2 363.4 325.4 284.8 233.2 189.8 Engine speed, rpm Engine torque, N.m 500 339 Engine Characteristics 1000 1750 2500 3000 3500 4000 4500 5000 379.7 406.8 393.2 363.4 325.4 284.8 233.2 189.8

Answer rating: 100% (QA)

Hence G 1 403 G 2 216 G 3 137 G 4 100 G Ale 354 1 Max Veloc... View the full answer