Cvt clutch tuning handbook

If you want to know how your clutch works, this book will save you valuable time and money. Peak rpm the rpm the machine sits and holds most of the time at wot. True cvt clutching theory indicates that the main purpose of the secondary driven clutch is to provide just enough belt tension to prevent slippage, and good backshifting characteristics the torque sensing aspect. His clutch tuning handbook remains a must read for vintage. This mqp defines an intuitive protocol for the tuning of the continuously variable transmission cvt for competition applications including the fsae design competition. Primary clutch drive clutch front clutch off the motor.

Up shift force in the primary and the secondary are built in losses in the cvt clutch design. Special chapters on clutch theory, testing and flyweight machining. Here are some general clutching rules you should play by. Powersports cvt clutch kits free shipping on orders over. The first puts into perspective how some designers in industry view the abilities of the cvt, a designers dream.

If you want to know more, aaeen performance has a complete guide called clutch tuning handbook. All about the cvt transmission found in scooters motoress. Theres one challenge the cvt presents versus the standard manual motorcycle transmission if youve got a dead battery you wont be able to. Cvt clutch tuning basics part 3 making the adjustments. All cvt units have a planetary gear set for reverse operation, and a two clutch packs, for forward and reverse. High performance tuning tips for your cvt clutch dirt. Clutch tuning handbook by olav aaen 1979 free download as pdf file. As others have suggested, definitely read the aaen clutch tuning handbook. Secondary clutch driven clutch rear clutch connected to drivetrain. As for making adjustments while out riding, thats pretty easy. Understanding the fundamentals i have made mention a number of times to a book by olav aaen entitled clutch tuning handbook currently updated 2009. Cvt clutch tuning in snowmobiles as i can in the following posts. This handbook provides clutch theory and practical application for the racer and trail rider. It was an older edition and does not have info on some of the new features on modern day cvt.

Does anyone have a copy of, olav aaens clutch tuning handbook that i could borrow. Clutch principles law a body of law and concepts which have been established by olav aaen which is the framework of modern cvt systems. There are two options for clutch optimization a a scientific method, or b a not so scientific. Team has supplied cvt components and assemblies to original equipment manufacturers oems and the aftermarket for nearly half a century.

It covers mainly 2 stroke snowmobile apps, but is describes in detail how the system works and what effects what. Ideal clutch tuning dear ralph september 27, 1995 0. Cvt, genetic algorithm, tuning, simulation, force balance, fitness function, v belt. A continuously variable transmission cvt is a light weight, gear reduction system that utilizes. Some of the clutching experts on here should give it a read. I think many folks will tell you that olav aaens clutch tuning handbook is pretty much the bible on that subject. Their testimony is more than likely to be true based on hisher experience, knowledge, training and appearance of honesty and. So, how does the average joe do it the reality of the matter is that most guys will replace this.

Cvt clutching here are some genral clutching rules you should play by. So you just bought a new scooter and people keep telling you about changing variators, roller weights and clutch springs. However, unlike the cvts other cousin, the automotive automatic transmission, the cvt is designed very ingenuously, to continuously vary the. Any questions for proper tuning of a ddp clutch can be handled by calling their knowledgeable staff at 763 2284345. Cvts have been used for years in power tools and drill pressesalso in tractors and snowmobiles.

If so would any of you be willing to share it with me. Clutching part 1cvt clutching theory polaris rzr forum. Cvt largest cvt manufacturer, continuously variable. Spring rates and helix angles should be selected to satisfy these. Cvt tuning is the process of deciding on which configuration of these components we want our cvt to.

I would highly suggest that anyone interested in doing their own clutch tuning to invest in the clutch tuning handbook. If you are interested i can aaen clutch tuning handbook it. Olav aaen wrote the early bible on clutch tuning in the mid1980s and his clutch tuning handbook remains a must read for vintage snowmobilers. Cvt is proving to be best transmission with difficulty of tracks increasing every year at baja. Primary clutch drive clutch front clutch off the motor secondary clutch driven clutch rear clutch connected to drivetrain peak rpm the rpm the machine sits and holds at most of the time at wot. Cvt tuning can be termed as tuning or making the pulley shift engage the cvt at a particular rpm, defining the rate at which it shifts with the rpm and the max possible limit where you want it to shift. Well, what is all that stuff and why should you care. This handy handbook by olav aaen includes theory and modification of the comet clutch systems, and the latest info on arctic cat, polaris, yamaha and skidoo.

How a cvt works ingenuity and engineering to create. Instead of a chain like a bycicle, the cvt uses a belt that rides on the surface of. Cvt cvt allows for the operation at the lowest possible speed and highest possible load, partially avoiding the low efficiency region of the engine map. C program files stc ilqa 0666 root images headerlogo. Cvt tuning guide for beginners canam maverick forum. With as many atvs that there are, it should be a simple solution for them to fit my setup. One of the greatest inventions that can be your best ally once you have a basic understanding of what the parts do, knowing what you are trying to achieve and a way to measure it tachometer. One cheek of this pulley is static, while the other can slide towards or away from it on a bushing. Of the many modifications that are routinely performed, clutch tuning is probably the most. Oh drat these computers, theyre so naughty and so complex. Cvt, if that was his name, invented a marvelously simple and effective way of transmitting power to the ground without the need for manual shifting, manual.

Have a 1999 or older snowmobile and need repair info. Most variated transmission mopeds use a variablediameter pulley vdp, or reeves drive type continuously variable transmission the drive pulley is often referred to as the variator. This needs to be in your models peak powerband for best results. For additional information, see the global shipping clytch terms and conditions opens in a new window or. It takes you through the theory and practical tuning of cvt clutches. Even the original edgar hetteen created trail cat used a cvt to transition the. Cvt clutch tuning if you are going to be tuning your own clutches, i highly recommend grabbing a copy of olav aeens clutch tuning handbook and reading it cover to cover. Search for library items search for lists search for contacts search for a library. Cpc clutch tuning handbook cutlers performance center.

However there r many cvts available in markets and u need to choose which cvt ratio fits ur design. I would be interested in learning how the cvt system works and also be able to install various components to improve performance. Many tuners feel that this is the holy grail for clutch tuning. A lot of times clutch tuners forget that little things do affect clutch operation and ultimately their overall snowmobile. Performance optimization of continuously variable transmission cvt using data acquisition systems daq. For an atv what is best cvt, fnr or gearbox and why. While the nuances of drivetrain delivery have evolved, the basic premise remains. Page 1 of 2 clutching 101 posted in sledding general discussion.

Always check the owners manual for the correct procedure and tools to use, as this can vary quite a bit from brand to brand. Our popular clutch tuning handbook has been revised for the ninth time, bringing you the latest in clutching technology. This handbook is geared toward the serious racer and anyone who wants the most out of their cvt clutching system and yet simple enough for a novice to understand. Large assortment of repair manuals and wiring diagrams, all free. In the days of snowmobiling, the cvt became the drive system of choice as it could hold an engine closest to. A continuously variable transmission cvt transfers power through a range of speedtorque ratios from.

When it comes to continuously variable transmissions, or cvts, team industries is an undisputed expert and world leader. They are made of rubber components reinforced with kevlar and. If you dont already have a copy, get one, read it, put it under your pillow at night, take. Pdf performance optimization of continuously variable. Cvt clutch tuning basics part 1 background and basics. The aaen clutch tuning handbook is very informative and interesting, however, rather than smoking my brain i think i will call whichever company has the kit of choice and let them guide me. Snowmobile clutch tuning vcmc motorsport club forums. Since then we have gone through lots of new, updat ed and expanded editions of this book. Anyway, olav aaens clutch tuning handbook is the bible of clutch setup. Clutching 101 sledding general discussion dootalk forums. Sometimes the best tuning practices for clutching are more than just running the proper weights or installing the right helix for your altitude. The cvt is very well matched to a 2stroke engine with its narrow power band.