Picture of 1996 zips baja car with solid rear axle swing arm. If youve been following along on our social media, youll know a lot has happened after the third quarter update in early april. I would strongly suggest you remove the reservoir and clean it out this should be done yearly to prevent the build. A methodology for selection of an optimum gear ratio. However, the engine placement with the lateral orientation will not meet baja sae competition rules cr11. The theoretical speed of the final design can be calculated using the tire size, possible gear reduction ratio, and the revolutions per minute of the engine. To serve this purpose i have developed a design which uses to the front wheel incorporated a telescopic drive shaft running down in front of the left hand fork leg, itself driven by a chain system that took power from the engine to a transfer gearbox near the headstock. Hopkins baja, 3100 wyman park drive, room wg30, baltimore. View shane frasiers profile on linkedin, the worlds largest professional community. Each year, the university of michigan sae baja team designs. The sae saluki baja team is in the final stretch of working on the car before winter break. We have been finding different reports from 2012 michigan baja, akron, and some others, but we are having a hard time with what initial assumptions to make, like output torque to the wheels we wantneed, cvt final drive ratio on low and top ends, shift points, efficiencies, losses, etc. Were excited for the next one, once we get around to putting the 11x wheel back on. The design should also include the driver controls for the system to improve.
Properly use of a powertrain and transmission components for a. Two step gearbox animation in autodesk inventor duration. Background information society of automotive engineers sae baja is an intercollegiate design series. After the approval among the team, the cad model has to be analyzed using ansys software to calculate the stress and strain of the cad structure.
As the rules dont limit us for drive line subsystems, we decided to use fnr gearbox and differential to develop the performance of the vehicle. Sae baja is a collegiate program where each team builds an offroad race. The design they used allows for a shorter gearbox height and a larger distance between input and output shafts. Kalyan potukuchi 11091007 kanishk raj 11091008 kuntal basu 11091014 under the supervision of prof. Umsae baja transmission design mspace university of manitoba. Sae membership helps you grow both personally and professionally. What are the powertrain calculations for the ebaja competition. The purpose of the 201415 society of automotive engineers sae baja mqp was to design, develop, and manufacture a vehicle within the specifications of the sae baja competition in order to enter a future competition. Most likely a cvt secondary clutch is mounted to the input of this gearbox and the output shaft needs to be. Several transmission and final drive options were researched. Gear box for baja sae upiita 3d cad model library grabcad. Final drive gearbox, michael mccausland, michael watkins, ian masterson, and andrew sommer. Baja sae challenges engineering students to design and build an offroad vehicle that will survive the severe punishment of rough terrain and in some competitions, water.
Virtual baja will usually commence 5 months before the final event. Determining the optimal fixed gear ratio for an sae baja. Its a gearbox with spur gears and a gear ratio of 7. Transmission manual transmission gearbox how it works. The final drive ratio of the car throughout the band of cvt manipulation is key to success at all of the events at the sae baja competition. Me450 finite element analysis fall semester, 2007 prof. Resham joshi software developer intenta gmbh linkedin. The 2004 auburn fsae vehicle mass was 7 kg lighter than 2003, with a similar peak power output. Baja event has a 4hour endurance run, which demands full potential from the drivetrain. This is an official page of baja sae, a program of sae international. By using simple calculation can find your gearbox reduction ratio that is the ratio of torque required at wheel and engine max torque. Empty drive oil reservoir, can i simply fill the reservoir with oil, or from bott if the drive is full already, all you need to do is fill the reservoir. Design of an sae baja racing offroad vehicle powertrain.
Me 450 final report deep blue university of michigan. Air resistance, grade resistance, rolling resistance for speed range of 0top speed you want to achieve and for geades. Looking for downloadable 3d printing models, designs, and cad files. For designing the gearbox for the vehicle you must know the parameter of engine and cvt drive like max torque produce by the engine and gear ratio of your cvt drive. By examine our mini baja team two past vehicles that didnt use reverse gear and differential, and the result of analyses, we see it is a prominent property for vehicle to use of these systems. Representatives from sae and leading engineers from the automotive sector will be posted as judge and approving committee. I hope this note finds you enjoying the start of summer.
Find a quality subaru baja drive shaft, rear and other used auto parts from the top auto salvage yards. Off to the races with a liquidsolid cvt transmission. We have the largest selection of subaru baja drive shaft, rear parts at discount prices. Some gtfours for example the st185rc and some us models came with a 3. Transmission gear ratio equation and calculator mechanics and machines calculations menu the following equations and calculators will estimate the resultant vehicle speed at a known engine rpm for a manual transmission with up to six forward gears. Transmission system is the next and final stage of the engine generated power before it hits the wheels. Asme human powered vehicle, benjamin knaus, philip basmadjian, and nick supat. The northwestern team opted for a continuously variable transmission, a custom singlespeed gearbox, and a unique unlockable differential that allows the driver to disengage either drive wheel. Final design for university of rochesters 2015 baja sae cars reduction gearbox. A 2wd and mostly a rear wheel drive is opted for the baja buggies. Our innovative design of steering gearbox won the best innovation award 2016 in sae baja india event. Timelapse cnc machining baja sae gearbox half duration. We managed to get tons of great data from our daq, get our newer members some experience behind the wheel, and get some great farmers tans. Many sae baja teams need a better functioning transmission.
The san luis obispo childrens museum energy of motion, patrick ligot, brian mich, jaime salazar, erik sanchez, and steven azeka. This research paper concentrates on baja atv cvt premises thermal cooling. The goal of this project will be to design and implement a complete manual transmission for usage in the society of automotive engineers sae mini baja vehicle. The university of manitoba sae umsae baja team is a school group. Sae international is the global leader in technical learning for the mobility industry. The aforementioned and the degree to which it has been done will affect the decision as to what fd is required. We communicated with the customer and they preferred having the transmission fit in a vehicle than meet the competition rules.
To find the final reduction ratio for cvt gaged gx9 reduction ratio r. Sae saluki baja, engineering buildings siuc, carbondale. Calculations for fnr gear box and cvt combination baja. This meant that a gear ratio which allowed optimal engine performance with a 14 diameter tire. Shane frasier pipeline safety engineer williams linkedin. The timeline for this project spans the summer of 2009 and concludes after the mini baja teams competition in western washington in may of. The last thing that a driver should be worrying about during a race is what gear he is in and whether or not he needs. What is the procedure for the calculation of the diameter of the drive shaft of a baja buggy. Cetys universidad has chosen to participate this year in baja sae international at portland, oregon, usa.
In our drive train assembly, we have used cvt coupled with fixed reduction gearbox, while having long run the temperature of cvt unit increases so much that it hinders the efficiency. Empty drive oil reservoir, can i simply fill the reservoir. Whether you are an engineer or business professional looking to advance your career, or an educator in search of creative and effective ways. Specifying the final drive ratio for a formula sae vehicle presents a unique problem. My final year project was on the suspension of are sae baja vehicle. Erin ebsch, jenna kudla, calvin obrien, and bridget quick. The torque produced by the engine is transferred through a transmission to the rear wheels producing an equal and opposite reaction force. However, my investigations showed that no change in transmission gear ratio accompanied such a modification for the university of akron. Check out our salukifunder campaign and consider donating. Continuously variable transmission, sae baja, acceleration. The chassis inherited from the 2014 sae baja mqp was utilized as a framework that the new designs had to integrate within. Discussion about gearboxrelated things and official threads for gearbox news, website features, and announcements. Engineering specifications engineering specifications customer needs customer needs importance based on a 110 scale where 10 is the most important and 1 is the least important. Fds are ultimately responsible for the way your mini goes after engine, gearbox, and under carriage tweaking has been applied.
University of utah sae mini baja race car aug 2012 may 20. Most of the components for the mechanical portion of the gearbox will. If you are a fan of what we do and want to see us race our first ever manual transmission baja car this year, we could really use your support. Baja sae design report suspension vehicle steering. How to calculate reduction gear ratio of atv sae baja quora. The final gear ratio reduction of an ivt system occurs through a series of. However, when placing the dimensions in the software, the team realized that the first. The teams are challenged to design, build and test a recreational offroad vehicle that conforms to the limitations established by the baja sae rules 2012 sae international, 2011 there are several regional competitions of the baja sae series.