Intake and exhaust acoustics gtpower is used for guiding the development of intake and exhaust systems, especially with respect to acoustic performance. Each muffler is designed and tuned specifically for the vehicle it is intended for taking into account everything from cabin volume, to exhaust length. How to make an arizona penny can alcohol stove duration. The results so far are astounding, with only a few weeks on the dyno and much more to come we have come forward leaps and bounds by. Jan 25, 2008 exhaust tuning theory and system design weve all heard the magazines talk about back pressure and most of what they say is utter cac so how do we ensure we have a good, efficient, exhaust system bearing in mind that back pressure, any back pressure, is a bad thing. The team proposed this project in order to have a powerful yet lightweight engine so they can be extremely competitive at their competition. Well begin the length calculation buy subtracting 212 from 360 equals 148, then multiply that by 850 equals 125,800. Oct 03, 2017 an indepth how to and tutorial of the exhaust tuning aspect in automation engine design. In testing it displayed enormous potential, setting. The exhaust pipes total cfm should be in the same range. Fsae 610cc max displacement, forced induction open, 20mm or 19mm if running e85 intake restrictor before any kind of intake system save the filter and throttle. Changing from honda 600cc to a yamaha yfz450 engine, either with standalone performance electronics edge module 3.
University of maine fsae engine team mick peterson. Exhaust optimization for viking motorsports formula sae. Then fea comparison between body side input and exhaust side input are conducted for an exhaust system. Tuning an exhaust system to a given application is a casebycase basis challenge. The book was published 25 years ago and is still published. How to design from scratch the exhaust manifold for a single. The engines are controlled by programmable engine control units ecus that handle spark timing, fuel metering and also provide other auxiliary features. Kokushikan university, japan, program in mechanical engineering. Dimensional software gtpower was applied to simulate the engine performance. Most street vehicle owners who intend to install a set of exhaust headers for improved performance are more concerned with installation and fit rather than the nuances involved in. At idle engine speed, the exhaust discharge noise is influenced by resonances in the whole system, which is composed of connecting pipes and silencers.
To give you one example, matlab can be used in tuning of the nozzle used as a re. Mastering exhaust system math to build highperformance engines. The team proposed this project in order to have a powerful yet lightweight engine so they can be extremely competitive at. Like the intake and cam profiles, the exhaust system can also be tuned to. Furthermore, various performance specifications for tuning the transmission were determined. Biggest understanding i learned is that intake and exhaust resonance tuning means. The regulations of formula sae competitions restrain design, tuning, and. The fsae rules committee imposed a rule that power of any fourstroke engine used in the competition should be limited by a 20 mm intake restrictor. Exhaust and intake tuning this article describes the principles involved in using tuned exhaust and intake systems on twocycle and fourcycle engines. Properly tuned systems can increase the charge of fuel delivered to the cylinders and a related phenomenon can aid in the extraction of exhaust gases from the cylinders. The adfa formula sae team of 2012 has purchased a yamaha wr450 single cylinder engine to be integrated into a new competition vehicle. Fsae engine controls and dyno development optimization of the. Cylinder small 4 stroke engine by intake and exhaust tuning. Based on the subsystems analysis, equations were derived and various calculations were completed in order to determine which cvt tuning components best met the performance specifications.
How to design from scratch the exhaust manifold for a. The exhaust system can be a vital tool for optimizing the performance of the engine, through the wa. The simulation results were compared to the test results provided by the jh600 engine manufacturer with good agreement. Yfz450 for formula sae question ive never seen asked. California polytechnic state university, san luis obispo. The competitors can focus on optimization of the intake and exhaust. Jan 24, 2015 mastering exhaust system math to build highperformance engines january 24, 2015 by muscle car diy exhaust systems dont generally invoke the glamour and gut level appeal associated with many highperformance induction systems, but they certainly play a critical role in the performance of every engine. Formula sae race car single cylinder engine design the university of waterloo formula motorsports team designs and builds a small openwheeled formulastyle race car to compete in the formula sae competition. You only have to put one cylinder value in, note from eliot. Being a street engine, it has a volumetric efficiency of 0. Introduction the formula sae fsae competition exposes students to the tuning and mapping of engines, primarily due to the intake restrictor required by fsae rules. While not recommended for street bikes, the use of drag or straight pipes can maximize the horsepower produced by any specific engine combination.
Please let us know in advance if you want us to cover any of these or other topics. The new muffler also reduces weight by 2 lbs over the preexisting system. The pressure wave dynamics result in noise being propagated from the intake and exhaust openings of the. The intake runners and plenum were then fabricated using aluminum and fiberglass epoxy composite respectively. Exhaust tuning theory and system design weve all heard the magazines talk about back pressure and most of what they say is utter cac so how do we ensure we have a good, efficient, exhaust system bearing in mind that back pressure, any back pressure, is a bad thing. These engines have a very short width as compared to the 4 cylinder engines.
While the concepts of intake manifolds vary, the restrictor performance is an important consideration for any intake design. A combination of a doubletuned resonator and helmholtz resonator was initially suggested as it. Considering the rules changed from a weighting to c weighting, we thought it would be a good idea to bring it back up. Mar 23, 2012 flowmaster exhaust technology explained laminar flow technology 101 duration.
Tuning these settings allowed for increased volumetric efficiency and power gains. The displacement, exhaust valve size, induction system, cam profile, exhaust port design and rpm range all factor into deciding what form the exhaust system should take. In accordance with findings presented, the presented silencer design. Exhaust system design software free download exhaust. Most street vehicle owners who intend to install a set of exhaust headers for improved performance are more concerned with installation and fit rather than the nuances involved in tuning for peak power and torque.
And a few lucky ones are able to get their hands on the ktm 510. Noise test muffler success there was a post back in 2003 on the fsae forums about different mufflers and their successes with different engines. The pipe resonance radiates a high level of low frequency discharge noise,which is. It is therefore the intent of this project to assist the team to understand the potential benefits of exhaust tuning as well as the methods that are available in the analysis and design of an exhaust. Intake and exhaust report thread 20192020 post by jimmy provax. Design and fabrication of air intake for fsae race car. Hey guys thought i would make a post about our engine tuning on our honda cbr 600 at uvic formula sae, the posted pictures are of the current dyno results with the previous dyno results in the background. Pdf camshaft design for an inletrestricted fsae engine. Exhaust capstone project, and lays out how our team plans to achieve its ultimate goal of redesigning the existing exhaust to increase the cars performance, while following fsae rules and regulations for proper documentation and validation. Yoshimura is renowned for its research and development. Each year, aspiring race engineers from hundreds of universities design, model and construct miniature formula type race cars. Exhaust optimization for viking motorsports formula sae team. A design method of engine intake and exhaust system for formula. I have heard of people putting something in the muffler before tech like a gel or.
Exhaust the fsae restriction regarding the exhaust is a 110 decibel limit. Fsae senior design team will redesign, manufacture and integrate a two position variable intake system. The parameters including the sphere style plenum diameter, the intake runner diameter, exhaust runner lengths and the position of retractor were optimized via a combination of the 1dimensional simulation and an orthogonal l9 34 testing design. Mastering exhaust system math to build highperformance. The parameters including the sphere style plenum diameter, the intake runner diameter. Designing the signature sound of car exhaust youtube. The engines used in fsae are limited to 610 cc engines having an output of 120 horsepower with 15000 revolutions. Our project objective was to design and verify a fsaecompliant powertrain to improve overall vehicle performance for the 2016 fsae. Intake and exhaust report thread 20192020 post by livy reyes thu sep 26, 2019 10. Introduction formula sae dictates that all competition cars entering an event must pass a noise. Citeseerx document details isaac councill, lee giles, pradeep teregowda.
But most of the teams do not use it as its applications are highly specific while other modelling software applications are diverse. That then reflects the sound wave back upon the next sound wave entering the mechanism all without interrupting the exhaust flow. Motec systems usa north american fsae partnership program motec systems usa is excited to announce its north american formula sae partnership program. Performance exhaust tuning techniques have been discussed and demonstrated such that this design should be able assist in shaping the torque and power output characteristic of the engine for the benefit of vehicle competitiveness. Exhaust and muffler design of a formula sae car scribd. An indepth how to and tutorial of the exhaust tuning aspect in automation engine design. All too often the engine exhaust is an afterthought for the engine and chassis builders, yet its design and construction impacts significantly upon car performance. Fsae engine controls and dyno development optimization of.
University of houston texas contacted sae educational relations department in 1978. Tuning the exhaust system can be an important component in achieving maximum power when optimizing the performance of an engine for racing or dyno shootouts. While not recommended for street bikes, the use of drag or straight pipes can maximize the horsepower produced by any specific. Intake and exhaust report thread 20192020 michigan state. The aim of this work is to underpin all future development by the adfa fsae team, of a high performance exhaust system for a single cylinder engine. The intake system is made up of the bell mouth, throttle body, restrictor, plenum, and intake manifold. A fsae vehicle submitted to the faculty of worcester polytechnic institute.
Optimization of intake and exhaust system for fsae car based. Mastering exhaust system math to build highperformance engines january 24, 2015 by muscle car diy exhaust systems dont generally invoke the glamour and gut level appeal associated with many highperformance induction systems, but they certainly play a critical role in the performance of every engine. Intake design features that are integrated onto the vehicle include an intake that also employs helmholtzs resonance in its runner length. An investigation into formula sae performance exhaust design and analysis. The engine is made up of the intake port, cylinder, exhaust port, and the exhaust system is made up of the adaptor, header, muffler, and tail pipe.
Yfz450 for formula sae question ive never seen asked before. Testing concludes that the exhaust system meets fsae regulations of 110 db at max engine speed and 100 db at idle. This software then underpinned the demonstration and theoretical analysis of performance exhaust tuning and silencer theories. This engine package was targeted for improvement because fuel efficiency and technical superiority has become much more prevalent in competition scoring as each competition passes. The advanced navierstokes based solver in gtpower intrinsically captures the pressure wave dynamics within the simulated system. Racingsm software has features for many different areas 2stroke exhausts development, drag racing features, simulators, carburetor tuning, connectingrod analysis etc with all this knowhow along with lufo racing heritage, we believe this is a very fair price. This racecar is the most technologically advanced that we have ever built. Currently the exhaust gasses from each cylinder merge inside the muffler at different points inside the muffler body rather than merging at a certain point. Moreover, the importance of conducting of exhaust tuning as a part of an integrated engine. One of the biggest downfalls of the current exhaust is the unequal length headers with lack of intermediate piping. The formula sae fsae competition exposes students to the tuning and mapping of engines, primarily due to the intake restrictor required by fsae rules. The exhaust system specifically designed for the engine 2008 honda cbr 600rr pc40, utilizes literatures on pressure. An investigation into formula sae performance exhaust design and. Brownfsae industrial heat treating pohl spring works 2010 was an exciting year for the development of the brown university fsae car, and constitutes a major redesign on almost every aspect of the vehicle.
Understanding muffler design and sound absorption strategies. Apr 28, 2015 this is a modified version of an article by jack kane which appeared in issue 036 of race engine technology magazine. Intake and exhaust report thread 20192020 michigan. Exhaust length,exhaust pipe,induction calculation, tuned exhaust pipe length calculation for singletwinsfours. Exhaust tuning theory and system design technical articles. Engine builders and car owners carefully consider the exhaust layout, select the parts, and fabricate the exhaust system that delivers the best performance for car and particular application. The main interface of bendtech exh gives you the ability to recreate the critical components of a vehicle axles, mufflers, gas tanks, etc and then properly route the tubing around them. Each diffuser angle and intake system was simulated using industry standard engine simulation software provided by ricardo. We use a number of specialized industrial software packages to develop items like intake and exhaust systems, steering, engine tuning, camshafts and suspension components. The formulas on this page were taken from fourstroke performance tuning by a graham bell. Each year, aspiring race engineers from hundreds of universities design, model and. Ricardos onedimensional engine simulation software wave has. Optimization of intake and exhaust system for fsae car. The course is free, but open only to members of fsae teams that have licenses of gtpower.
They gave us some insight on how exhaust sizing and design can affect performance. This software was used to simulate the powertrain system model of the 5th. With the current system failing to meet fsae regulations and lacking in rigorous engineering design, the team is. Aug 16, 2015 the exhaust pipes total cfm should be in the same range. Ricardo wave simulation on the effect of exhaust header. This project, formula sae turbocharger system development, was sponsored by the cal poly, san luis obispo formula sae team. A picture of the final intake assembly is shown below. The virtual engine model has been developed in ricardo wave software and. Our project objective was to design and verify a fsae compliant powertrain to improve overall vehicle performance for the 2016 fsae. In fact, the exhaust systems design, components, and materials have a large impact on the overall performance of the engine. Improvement of intake restrictor performance for a formula. Tuning software accompanied with the efi controller allows for control of the fuel and ignition settings. The design and testing of a high performance formula sae.
181 727 522 1292 526 518 1215 347 18 1058 888 147 1089 415 938 1192 703 483 1188 1516 889 67 848 214 1406 379 1318 1110 613 1002 120 706 1437 1388 635 864 1036 716 82 1474 220 220 336