International Journal of Advanced Engineering, Management and Science (IJAEMS) [Vol-1, Issue-4, July- 2015] ISSN: 2454-1311 Page | 27 Design of a Drivetrain for Sae Baja Racing Off- Road Vehicle Rishabh Jain 1 , Dr. P S Ranjit 2 1 Student, Department of Mechanical Engineering, College of Engineering Studies, University of Petroleum & Energy Studies, Dehradun, India 2 Assistant Professor (Selection Grade), Department of Mechanical Engineering, College of Engineering Studies, University of Petroleum & Energy Studies, Dehradun, India Abstract— With growing time, the participation of the students in SAE BAJA is increasing year by year. The vehicle’s performance is highly dependent on the installation and appropriate use of Drivetrain components. Drivetrain includes powertrain (prime mover i.e. engine/motor) and transmission components (gearbox, shafts etc). Therefore, Drivetrain is also called as the driving force of any vehicle. The proper design of Drivetrain is thus a part and parcel for any vehicle. The lack of literature available for a optimize design of Drivetrain makes it a hard nut to crack for the students who don’t have any past experience. Thus there is a need for some source by which the students can learn to design the Drivetrain for SAE BAJA. The engine vibration is another aspect which is needed to be considered. NVH consideration is another deciding parameter in BAJA vehicle’s performance which if neglected could leads to lethal results. Therefore proper installation of engine mounts is required according to the need. Thus, this segment aims at developing the Drivetrain for BAJA vehicles which can boost up the performance of the vehicle. Properly use of a powertrain and transmission components for a vehicle along with the calculations according to the need will be discussed in detail. This segment also aims at developing the conceptual understanding of the performance parameters of a BAJA vehicle among the student which will be helpful in their academic curriculum as well. Keywords- Baja, Drivetrain, NVH, Powertrain, Transmission. I. INTRODUCTON Due to lack of literature integrity for the Drivetrain design, one has to explore different section from different media in order to design even the single useful component of Drivetrain. This process is time consuming and extremely difficult to perform. There is a need of platform where students can learn all the important aspects regarding the design just like one pit stop for all the maintenance work. This paper will allow students to explore and learn all the design consideration and they can design the Drivetrain of their BAJA vehicle taking this segment as a useful handbook. The objective of this paper is to design the powertrain for SAE BAJA Racing off-road vehicle which should be Light weight, compact in size and reliable. One of the deciding factors of any vehicle’s performance is the comfort level of driver, which comes with the less driving fatigue. The noise and vibration is another aspect which should be worked on, to reduce the unwanted stresses in the frame. Therefore, NVH consideration is must and should be installed properly. Performance parameters like gradiability, acceleration, top speed, transmission etc will be discussed on the basis of their influence over the vehicle under different conditions and calculations. Various other components like coupling, half shafts will be selected and customize according to the need. This paper will include- selection of Engine, transmission, differentials, half shafts, CV joint assembly, calculation of reduction ratios and Engine mounts. II. POWERTRAIN The powertrain acts as a power plant for the vehicle. Its main purpose is to provide the driving torque at the wheels. This applied torque at the driven wheels causes’ vehicle to move. The power source should be chosen such that it should be able to provide high torque at low rpm and peak power at high rpm. For such dynamic requirement, a stock four cycles, air cooled engine would serve the purpose. This segment has considered Briggs & Stratton (B&S) 10 HP OHV intek Engine as a prime mover/Powertrain. One can choose from different options on the basis of performance curve of the engine. Following are the Baja acceptable engine: 20S232 0036-F1 205432 0536-E9 205332 0536-E9 205332 0536-B1 This engine develops maximum torque of 18.66 N-m at 2600rpm and peak power of 9.14 HP at 3800 rpm.