ME632 - Autonomous Wheel Power Management Systems - Tractive Running Gear Efficiency Computation - Engineering Assignment Help

Assignment Task

Given 

• Consider a 4x4 tractor in steady motion. The front wheels are in poor road conditions  (mud), the rear wheels are in good road conditions (dirt road).  
• The rolling resistance coefficient of the front wheels is f1 = 0.18. 
• The rolling resistance coefficient of the rear wheels is f2 = 0.035. 
• Friction coefficient of the front tire, ∝ px , is 0.417; empirical coefficient, k , is 4.038 Friction coefficient of the rear tire, ∝ px , is 0.721; empirical coefficient, k , is 8.034 The draw bar pull is 2kN, 4kN, 6kN, 8kN, 10kN. 

Assume  

• Assume that the function ( ) δ F f s x = is an exponential one. Consider a bicycle model of  the tractor.  
• Normal load on the front and rear wheels is the same and equal to 20kN. 

Determine  

• For each value of the draw bar pull, compute tractive running gear efficiency of the  tractor when the circumferential wheel split between the drive axles is q1 = 0.25; 0.50; 0.75; 1. 
• q2 = 0.75; 0.50; 0.25; 0. 

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