Question: A car has the following torque / engine - speed curve: M e = 8 . 7 n e - 0 . 0 4 6

A car has the following torque/engine-speed curve: Me=8.7ne-
0.046ne2. Where, Meis the engine torque in ft-lb and n the engine
speed in revolutions per second. The car travels in the gear that
produces the maximum torque at 110 miles per hour, its wheel radius is
14 in, and the drive axle slippage is 1.75%. The drivetrain efficiency of
the car is i=91.5%. Its weight is 2,274lb. and travels on a track that is on
a 2.8% upgrade. The car's frontal area is 21.1ft2, its drag coefficient is
0.33, and the surrounding air density is 0.0022 slugs ?ft3.
Question 1.a. What is the max torque?
Question 1.b. What is the value of the gear reduction ratio that
produces the maximum torque
Question 1.c. What is the engine-generated tractive effort for the
previous conditions ( hat(): ) in lb ?
Question 1.d. What is the grade resistance in lb?
Question 1.e. What is the aerodynamic resistance in lb)?
Question 1.f. What is the rolling resistance in lb?
Question 1.g. What is the acceleration of the car for the previous
conditions in ft/s2?(Assume engine-generated tractive effort provides
the maximum tractive effort
A car has the following torque / engine - speed

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer
Step: 1 Unlock blur-text-image
Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock
Step: 3 Unlock

Students Have Also Explored These Related Mechanical Engineering Questions!