Our camshaft design programs allow end users to examine multiple designs in a short period of time, minutes. The trajectory can be set graphically, coordinates or function. The program must be able to receive input design parameters, process them and provide visual and numerical information for the user to make decisions in the design process. On recieving your order, the software will be compiled with your company name on the start page. Two of these include, importing curves from outside sources and using the cam feature in the solidworks toolbox. For cam design, not only is the lift curve important, but also several. One of the big benefits with a roller cam is that the lobe shape isnt limited by the profile of the flat tappet. The cam profile is calculated and a cuttercoordinate file can be exported in. The science behind camshaft design circle track magazine.
Camshaft lobe design tilden technologies camshaft design. This means that the relative motion between them is a combination of a relative turning motion and a relative translating motion. Analytix cams mechanical engineering software saltire software. For this reason, we need to learn a bit more about lift curves before we can discuss how lobes are designed. Dynomation6 lobe profile library motion software, inc. The first step of the verification process is the creation of a design file that can be sent to the cnc grinder to create the cam lobe profile. Cam design also called cam profile design is the art of getting maximum performance from a cam gear, making it fast and reliable. Cam design and analysis programs camshaft calculations. The dirty little secrets about camshaft design every engine builder should know jim wolf. An interactive camshaft calculator where engine builders can see how valve overlap and boost efficiency is affected by a camshafts physical design. Kinematics, fluid dynamics and metallurgy must all be mastered by any engineer that sets out to design a. I would be using this for an overhead cam, direct acting bucketlifter design. However, software related to engine building can serve as a tremendous aid in your quest to design and, in some cases, test a virtual engine build combination. While mechdesigner software is particularly suited to packaging machine design, it can also be used to design camshafts for engines.
Cam spring excel spreadsheet showing how to perform simple force calculations. The camshaft timing card included with your cam provides the essential specifications for installing your cam correctly. You can see an application of the cam follower in another article here about the internal combustion engine. Speedwiz features two separate camshaft calculations. Valve opening and closing points are used in the first calculation, while duration and lobe center angles are. Computer program to measure cam profiles camshaft profiles by hand, or analyze graph and report several various computerized cam file formats like cam dr tm, cam pro plus tm. Camshaft specifications and terminology speedway motors. Engine building software engine builder professional. Engine builder professional is an easy to use engine building software tool for 8, 6, 4, 10 and 12 cylinder engines. Cam mechanisms are widely used because with them, different types of motion. The cam can be a simple tooth, as is used to deliver pulses of power to a steam hammer.
The calculation results of dynamics and engine experiment demonstrate that, compared to a. Contact stress, spring fatigue, and friction can be analyzed at multiple levels of fidelity. Simply put, if you want the highest modeling accuracy in dynomation6, this lobe profile library will be a priceless addition to your engine design tools. The cam profile manufacturing data is found and output produced for a given valve lift. Worlds top manufacturer of performance camshafts, lifters, valve springs, rocker arms and related valve train parts for all race and street performance engines. Whether were talking about axle ratios, compression, carburetor size, timing, or e. Machining and assembly skills are still required for the build itself. Points to keep in mind when selecting your camshaft. Camshaft software is an indie startup based in wellington new zealand, built around a small core team of games professionals and car enthusiasts, collaborating with a variety of talent from the vibrant games development scene in the anz region. Cam manufacture is part of the 4sthead design software suite. Complete in house machining and heat treatment process, seems oriented to the oem market.
Pricey but worth it, and it comes bundled with some very good software. This enables one to zero in on the best camshaft profile, lobe spread, rocker ratios, cylinder head porting, intake manifold geometry and exhaust header design to come up with. The science behind camshaft design is as advanced as anything in a race car, so most of usincluding experienced engine buildersdepend on the manufacturer to help spec the right cam for a. Without owning the original design profile data, there can. Norton associates engineering cam design2 design of machinery. This program solves the kinematic and dynamic equations for camfollower. Taken from modern engine blueprinting techniques by mike mavrigian computer software doesnt build an engine. How to use mgis camshaft calculator when shopping for camshafts from different manufacturers, enter each of their supplied cam card specs into mgis camshaft calculator. In the paper an asymmetrical nharmonic mathematics model of cam profile is constructed, and the software on design of cam profile is compiled.
Norton, design of machinery introduction to cam design. It was developed to allow the user to fully optimize the selection of engine components and engine settings for the ultimate engine build. What sets gtsuite apart is the ability to quickly scale the scope of the model as needed. Degreeing cam excel spreadsheet showing calculations to make when degreeing a cam profile.
Mechdesigner will calculate the globoidal cam profile to machine accuracy no approximations. Ability to show comparison cam shape lift, velocity, accelleration and jerk on the design page. Controlled induction camshaft requirement software guarantees it. Valve opening and closing points are used in the first calculation, while duration and lobe center angles are used in the second cam calculation. They differ only in the way in which the cams basic profile event positions are specified. This section is designed to help in selecting the correct camshaft for your engine. A design approach of asymmetrical cam profile and its effect.
There are many numbers and terms used to describe the design of the camshaft and its important to know how these numbers will affect the performance of your engine. Camshaft basics from the february, 2009 issue of chevy high performance by bob mehlhoff. Don hubbards camshaft reference manual is a very detailed reference on the low level details of camshaft design. This is the actual designing process of the cam lobe.
In the operation of high speed, highly flexible systems, interior performance may be attributed to the difference between what the. Oct 23, 20 taken from modern engine blueprinting techniques by mike mavrigian computer software doesnt build an engine. One basic rule in cam design is that this motion curve must be continuous and the first and second derivatives corresponding to the velocity and acceleration of the follower must be finite even at the transition points. Generally speaking the majority of cams will fall between 98 and 120 degrees. Cam design and analysis programs for more than three decades, computerized cam program development at andrews products has been a continuous effort. This is the angle between the inltake and exhaust camshaft lobe peaks described in camshaft degrees. Professor gordon blair of queens university of belfast wrote a very sophisticated cylinder head design package that covers very detailed cam and spring. Rapidly opening valves and higher valve lift is possible with a roller camshaft design.
More life and duration, combined with faster opening and closing valves, mean greater air flow. Its greek jargon, or street parlance to the rest of the world, but it often defines us. Any cam profile developed in analytix cams can also be used inside analytix mechanical simulation software to analyze the cam motion in combination with actuators, linkages, or other parts of a larger mechanical system. Ingram engineering cam profile designs is a custom cam profile design service for camshaft grinders, engine builders, and anyone needing a specific cam profile design. Mar 22, 2007 the science behind camshaft design is as advanced as anything in a race car, so most of usincluding experienced engine buildersdepend on the manufacturer to help spec the right cam for a. Understanding camshaft specifications there are many numbers and terms used when describing a camshafts design that must be understood when choosing a cam. Camshaft math to design competitive performance engines. Cam and follower design basics design of cam profiles and. It includes lobe lift, net valve lift, timing points at the advertised duration, duration at 0. A design approach of asymmetrical cam profile and its. Using the program, the author designs an asymmetrical nharmonic cam profile of a highspeed diesel engine. Known for motorcycle applications, but also involved in camshaft manufacturing, modern racing profile design, cam grinding, welding, and vintage cam restoration. Not only can you load and test all existing comp cam lobe profiles, but you can mix and match lobes for allnew designs, and even test experimental profiles. In fact the software allows, to design valve lift law, to calculate cam profile for the main type of valve train system, to verify the valve train system with the spring load calculus and also to analyze the geometry of combustion.
In fact the software allows, to design valve lift law, to calculate cam profile for the main type of valve train system, to verify the valve train system with the spring load calculus and also to analyze the geometry of. Another helpful item for choosing a cam is the free software offered by comp cam, called camquest. The basic purpose of using the cam follower is converting the rotary motion of the cam to the translating or oscillatory motion of the follower. Heres how analytix cams is used to synthesize a cam profile. Camshaft lobes are designed by starting with the lift curve, and working backwards to determine the lobe shape that will produce the lift curve. Cam design software is fully integrated into mechdesigner.
This is a universal cam analysis program that can also calculate cam lobe stress psi and theoretical valve gear separation rpm valve float based on known valve gear mass and spring data. The dirty little secrets about camshaft design every engine builder should know jim wolf valve motion is probably the least understood element of a successful performance engine. I am looking for a good camshaft design software package that will allow entry of different cam profiles and be able to predict the seat and nose pressures required for proper valvetrain motion. Camshaft choice camshaft specifications guidelines. Users do this with an adjustable camshaft diagram, in which they select duration, lobe. Gtsuite provides many tools to the valvetrain engineer, from single valvetrain layout and kinematics, to full multicylinder camshaft dynamics. Cam designs often use conjugate cams for improved performance. Cam and follower design basics design of cam profiles.
Calculation of camshafts allows to define a camshaft profile on the set trajectory which should provide the given mechanism. In this study, the effects of modifying the restrictor design, intake runner length, intake camshaft profile, exhaust geometry, and silencer design were measured using a transient dynamometer. Mechdesigner is much more than cam design software. This thesis addresses the development task of a software program for camshaft design.
One basic rule in cam design is that this motion curve must be continuous and the first and second derivatives corresponding to the velocity and acceleration of the follower must be. Professional cam and perfect cam software to design the. His software has the capability of actually changing the camshaft profile to enable producing new camshaft profiles for testing in my engine simulation software. Ezcam details and software velocity jerk base circle. Lobe profile data ensures the highest valvemotion precision within dynomation6. For example, in a disk cam with translating follower mechanism, the follower translates when the cam turns. Professional cam and perfect cam software to design the cams. You can model then let mechdesigner calculate the cam coordinates of just about every cam type, including. The following remarks are intended to help you select the correct camshaft, if you have a camshaft that works very well in one type of engine, this will allow you to adapt from one engine to another. Analytix cams mechanical engineering software saltire. Pdf camshaft design for an inletrestricted fsae engine. A number of methods of spring pack design are available to allow combined optimization with camshaft profile design.
Most of the information in this blog section describes what is involved in designing a cam profile. The series will also point out a number of tutorials that are already in solidworks and can help with a. Programs originally written for dos based computers have been converted to operate on windows pc operating systems including xp, vista, win 7 and more recently, windows 8. In the mid 1950s, with the aid of an electronic computer, the polydyne formula was employed by iskenderian engineers. Professional cam and perfect cam is the ideal and complete software for engineering, team, tuner, etc. The method termed inversion is commonly used in cam profile design. A cam is a rotating or sliding piece in a mechanical linkage used especially in transforming rotary motion into linear motion. Jun 18, 2012 this is the first video in a series that shows how solidworks can help you out in school. In addition to lift data for all of the cam lobes, lobe tip angles are also measured and referenced to a feature pin or keyway as a zero degree point. This revolutionary camshaft profile combined the advantage of the polynomial equation with the dynamics of the valve train. To generate the best profiles available, we have developed our own cam design software to tackle any design constraint of modern times.
Cam profile designs are furnished with the lift and design data along with. It takes 3 to 4 minutes and has been proven to be accurate over the past 30 years. Without a design file, we would not be able to compare the finished manufactured camshaft to the required design specifications. This is the first video in a series that shows how solidworks can help you out in school. Use mechdesigner cad software to design complex mechanisms, cams and motions use mechdesigner to design machines so that they move smoothly and precisely with mechdesigner, it is easy to design any number of mechanisms and cams in one model, then analyze, scrutinize and optimize all of them together, so that you can get the best machine performance. We would normally recommend that you use specialist software for the design of engine camshaft because there are special requirements for valve timing cams. With an ezcam gage, you can inspect one single lobe, two lobes intake and exhaust or an entire camshaft. Understanding camshafts camshaft basics camshaft design. Valdyn kinematics produces comprehensive outputs to enable springcam design to be assessed, including cam contact hertzian stress, oil film thickness, cam wear, spring cover, spring stress and spring natural frequency. Explain how the fundamental law of cam design applies to selecting an appropriate cam profile design double dwell cam profiles using a variety of motion types cam motion design.