International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395 -0056 Volume: 04 Issue: 05 | May -2017 www.irjet.net p-ISSN: 2395-0072 © 2017, IRJET | Impact Factor value: 5.181 | ISO 9001:2008 Certified Journal | Page 454 Design Methodology of Steering System for All-Terrain Vehicles Dr. V.K. Saini*, Prof. Sunil Kumar’’ Amit Kumar Shakya #1 , Harshit Mishra #2 *(ead of Depǯt of Mechanical Engineering, IMS Engineering College, Ghaziabad (U.P.), India ǮǯProfessor, Depǯt of Mechanical Engineering, )MS Engineering College, Ghaziabad ȋU.P.Ȍ )ndia # UG Scholar, IMS Engineering College, Ghaziabad (U.P.), India Abstract-: This Study named DzDesign Methodology of Steering System for All-Terrain Vehiclesdz is to ensure the most efficient steering assembly selection for an All-Terrain Vehicle. In this process various parameters are kept in mind for an effective selection of Steering system. The Steering system uses a Rack and pinion gearbox for Steering along with this Ackerman geometry is being used for the steering assembly. In this assembly modified Column of Tata Nano car is used which is connected to Rack and Pinion Gearbox by a Universal Joint. The Steering wheel is so designed to meet the weight reduction requirement along with keeping in mind the driver comfort. The Rack and pinion gearbox is connected with Steering arm by the Tie Rods. Tie Rods and Steering arm are being designed and analyzed for their load bearing Capacities. Keywords -: Rack and Pinion Gearbox, Ackerman Steering Geometry, All-Terrain Vehicle, Tie Rods, Steering arm 1. Introduction The design of steering system has an influence on the directional response behavior of a motor vehicle. The function of the Steering system is to steer the front wheels in response to driver inputs in order to provide overall directional control of the vehicle. However, the actual steering angles are modified by the geometry of the suspension system, reactions and the geometry of the steering system and the reactions of Powertrain if the vehicle is front wheel drive. The rack and pinion system has gained popularity for the passenger cars as well as for the because of the advantages like a simpler design and better suitability of front wheel drive system and adaptability to vehicles without frames. The Gearbox is the primary means for the numerical reduction between the rotational input from the steering wheel and rotational output about the steering axis. The steering wheel to road wheel angle ratios normally vary with the angle, but have a general value of the order of 15:1 for commercial passenger cars to 4:1 for racing cars. Initially, all Rack and Pinion systems are available that have fixed ratio and any changes in the ratios are obtained by changing the geometry. Today, rack and pinion systems are available that can vary their gear ratios directly with steer angle. The lateral acceleration produced by the gearbox is relayed through linkages to steering arms on the left and right wheels. The kinematic geometry of the relay linkages and steering arms is usually not a parallelogram (Which would produce equal left and right steer angles), but rather a trapezoid to more closely approximate Dz Ackermandz geometry which steers inner wheel to greater angles than outer wheels while turning. 2. Methodology The Process followed for design and fabrication of Steering system involves following steps. 1. Analysis of Previous year’s Vehicle 2. Defining the Objective for New vehicle. 3. Market Survey for the Components used. 4. Steering Geometry Iterations. 5. Design Validation. 6. Steering system parts fabrication. 7. Steering system Assembly.