IJRME – Volume 5 Issue 1 Paper 6

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VIRTUAL DESIGN VERIFICATION OF MODULAR SPIKE SHAFT THROUGH SEMI-AUTOMATIC DIFFERENTIAL LOCKING FOR SUV

Author’s Name :  Jeevan Jathar | Rahul Joshi

Volume 05 Issue 01  Year 2018  ISSN No:  2349-3860  Page no: 16-18

12

Abstract:

This paper presents theoretical calculation, CAE analysis and experiment validation on rig test of diff lock mechanism for easy shift select and positive locking. Bench test experiment has been carried out to correlate theoretical calculations and also virtual analysis which contents two cases one is with bench test 12 volt DC motors and second with actually off road vehicle torque data i.e. 60HP (Torque 80N-m) engine with five speed manual transmission and spiral design of crown wheel rear axle mechanism . This experiment has been done in order to achieve good performance in terms of smooth shifting and positive locking without failure of spike shaft. The diff lock concept refinement is done using theoretical iteration with spike shaft design. The performance prediction sheet has been developed. A range of performance analysis is done accordingly different road maps and gear application. The shear stress values are recorded; compared and plotted on the graph.. Thus the selected parameters are input into actual design to make it more realistic and safe spike shaft design.

Keywords:

SUV, CAE, FEA etc.,

References:

  1. Giordani, G. and Fratta, C., “Light Commercial Vehicle with Locking Differential,” SAE Technical Paper 2013-36-0467, 2013.
  2. Pinho, A. and Franco, C., “Studies on a Usage of a Limited Slip Differential Without Full Locking Features Compared to Open Type Differential and Traction Control in Mid-Size Truck – Drivers for Strategic Decision Balancing Technical Performance and Customer Perception,” SAE Technical Paper 2015-36-0164, 2015.
  3. Hopkins, P. and Metz, L., “Oversteer/Understeer Characteristics of a Locked Differential,” SAE Technical Paper 942485.
  4. Russo, R., Strano, S., and Terzo, M., “Yaw Moment Control of the Vehicle by Means of a Magneto rheological Semi-Active Differential,” SAE Technical Paper 2015-24-2529, 2015
  5. Automotive transmission – G. lechner and H. Naunheim.