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. Professional cam and perfect cam is the ideal and complete software for engineering, team, tuner, etc. Camshaft design and theory is the property of its rightful owner. Camshaft lobe design tilden technologies camshaft design.
To generate the best profiles available, we have developed our own cam design software to tackle any design constraint of modern times. Motion softwares lobeprofile libraries mark another first for the performance industry. Jan 24, 2015 camshaft math to design competitive performance engines january 24, 2015 by muscle car diy camshafts are a subject that all car guys love to talk about, and those who listen tend to roll their eyes at the staggering number of terms and numbers. 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.
Lotus replacement camshafts lifters, followers, buttons. It was originally offered for publication in the chapman report. Im wondering if any of you have cam lobe design software. Engine builder professional is an easy to use engine building software tool for 8, 6, 4, 10 and 12 cylinder engines. Kinematics, fluid dynamics and metallurgy must all be mastered by any engineer that sets out to design a. Lotus group engineering offereings for engine simulation, camshaft design and valvetrain dynamic simulation. Lotus engine simulation lesoft, avl fire, and gtpower. Cams are used to convert rotary motion into reciprocating motion camshaft. An excellent camshaft design program, at a very reasonable price, is dynacam by robert norton. There are many different programs available on camshaft selection ivan tighe engineering are currently investigating these programs.
We had confirmed that a cam with near stock characteristics gave better performance. This thesis addresses the development task of a software program for camshaft design. Pdf camshaft design for an inletrestricted fsae engine. These marks are usually located on the crankshaft pulley and corresponding marks located at the front of the engine eg.
Lotus engineering software pages 1 20 text version. 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. The camshaft timing card included with your cam provides the essential specifications for installing your cam correctly. Feb 18, 2009 camshaft design system is used to modify the valve acceleration curve, calculate the valve lift and generate the cam profile with special features for frequency analysis, piston valve. Calculation of camshafts allows to define a camshaft profile on the set trajectory which should provide the given mechanism. A projection on a rotating part in machinery, designed to make sliding contact with another part while rotating and to impart reciprocal or variable motion to it. Lotus engineering software an approach to modelbased design r. Its greek jargon, or street parlance to the rest of the world, but it often defines us. Lotus engineering software has been developed by automotive engineers, using them on many powertrain and vehicle projects at lotus over the past 20 years. This component covers the design and analysis of valve train systems with particular reference to camshaft profiles, often referred to as cam synthesis. We would normally recommend that you use specialist software for the design of engine camshaft because there are special requirements for valve timing cams. Over the years i have concluded that aftermarket camshaft design consists of. Lcvt models all aspects including contact stress, float speed, radius of curvature and valve to piston interference to enable the design and development of a camshaft profile. The program also includes routines for rockers and followers.
Professional cam and perfect cam software to design the cams. The lotus 918 is an interference design engine, meaning that it is possible for the valves to contact the pistons if correct cam timing cannot be maintained. Modal analysis modal analysis of camshaft is performed by ansys software to determine stress and deflection solid modeling of camshaft. Dema elgin, of elgin industries, in response to the numerous requests for info on the subject of camshaft selection. Cam design software is fully integrated into mechdesigner. Until now, the only way you could obtain lobeprofile data was to purchase the cams you wanted to evaluate and measure the lobes in a fixture by hand. The programs tested are very accurate if a chevrolet v8 is the test engine, but if a 16v suzuki is tested, in particular. This section is designed to help in selecting the correct camshaft for your engine. 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. Virginia speed has over 100 combined years experience designing custom camshaft and valvetrain systems. It includes lobe lift, net valve lift, timing points at the advertised duration, duration at 0. 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.
Once we have brought all the relevant data together it is input into our unique camshaft design software package and work commences on the lobe design. Adjusting and setting camshaft timing lotus marques. Professional cam and perfect cam software to design the. Freevalve update camless engine inside koenigsegg youtube. I prefer instead to use maximum velocity in the camshaft design which allows my cams to have more duration at. In the otto fourcycle engine, this sequence is timed in relation to the crankshaft and pistons. I tried that software a year or two ago, found it very difficult to control the shape of the acceleration let alone jerk curve.
Blairs software and one version of lotus works differently, they design the acceleration curve, integrate to get velocity and lift. The paper has shown how lotus engineering software can be used as an integral part of the powertrain design and development process. In addition to the design of the cam lift function, the quasistatic analysis predicts forces, contact stress and float speeds for the. For this reason, we need to learn a bit more about lift curves before we can discuss how lobes are designed. Basically, the purpose of a camshaft in an internal combustion engine is to open and close the valves in correct sequence. While mechdesigner software is particularly suited to packaging machine design, it can also be used to design camshafts for engines.
It deals specifically with the concept phase using rigid body quasistatic analysis. Lotus vehicle simulation can be used to set engine performance targets required to achieve a. Rodemann lotus engineering hethel, ukabstractmodelbased design processes are key to the reduction of time scales for new vehicle and engineprogrammes. If we were to ask for a show of hands, its a safe bet to. I have been working with a design company however they have zero practical knowledge of performance camshaft designing so prototype machining time is eating up my development budget fast. All manufacturer names, symbols, and descriptions, used in our images and text are used solely for identification purposes only. If so, share your ppt presentation slides online with.
The commercially availability of the analysis codes constituting lotus engineering software have arisen from the successful use of these programs on many powertrain and vehicle projects at lotus over the past 15 years. Lotus concept valve train lcvt a cam profiling application that comprehensively encompasses all aspects of valve train design. Lotus concept valve train is used to assist in the design and analysis of camshaft profiles, valve springs and valve to piston clearance. After completing the element properties, meshing and constraints the loads are applied on camshaft for three different materials. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext.
Camshaft design system is used to modify the valve acceleration curve, calculate the valve lift and generate the cam profile with special features for frequency analysis, piston valve. Computer simulation is a key part of the automotive development process. 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 timing tools engineancilliaries the lotus forums.
I would like to borrow some so i can make my own set. However, if you have particular needs, we do offer inhouse cam design for the most demanding applications. Model t camshaft design by larry young presented at sunflower crankers winter clinic, hutchinson, ks, jan. Blairs software and one version of lotus works differently, they design the. Welcome to the future of dyno simulation software virtual engine dyno is a computer software program used by engine shops and performance enthusiasts to simulate building, modifying, tuning and dyno testing automotive engines before component purchases and engine assembly. To perform finite element analysis on camshaft, the solid model created in proe. Whether were talking about axle ratios, compression, carburetor size, timing, or e. They give you unparalleled freedom to design and test endless engine combinations while sitting around the house in your underwear and without spending a dime on dyno time. Virtual engine 2000 race engine simulation software.
Camshaft math to design competitive performance engines. Also could do with the transmission seal tools too. The goal is independent control over each valve by replacing the camshaft with pneumatic actuators and software to run it. It is neither inferred nor implied that any item sold by is a product authorized by or in any way connected with any vehicle manufacturers displayed on this page. Ability to show comparison cam shape lift, velocity, accelleration and jerk on the design page. On recieving your order, the software will be compiled with your company name on the start page. The trajectory can be set graphically, coordinates or function. All types of car manufacturers can be led to success if managed properly. Before attempting to adjust valve timing it is necessary to check the manufacturers crankshaft timing marks. Ppt camshaft design and theory powerpoint presentation. Cat cams has a large database of cam designs available, ready for grinding to suit your custom project. Understanding camshafts camshaft basics camshaft design. Machining and assembly skills are still required for the build itself.
Cam profile designs are furnished with the lift and design data along with. In this work, a camshaft is designed for multi cylinder engine and 3dmodel of the camshaft is created using modeling software proengineer. V8 cambelt tensioning guide to checking cambelt tension not covering setting cam timing by mike s. The ultimate objective of the cam shaft function is to trap the greatest possible weight of fuelair. This software that we have developed allows us to create a lobe or catalogue of lobes which meet the requirements of the engine without. Just joined and now looking to do a few bits and pieces. Over the years i have concluded that aftermarket camshaft design consists of far more smoke than fire. Has anyone a set of timing tools they could sell lend to me. This software that we have developed allows us to create a lobe or catalogue of lobes which meet the requirements of the engine without pushing the valve train too breaking point but at the same. Advanced design basically, the purpose of a camshaft in an internal combustion engine is to open and close the valves in correct sequence. Taken from modern engine blueprinting techniques by mike mavrigian computer software doesnt build an engine. These packages are similar in purpose and functionality. You can model then let mechdesigner calculate the cam coordinates of just about every cam type, including. Camshaft basics from the february, 2009 issue of chevy high performance by bob mehlhoff.
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. Camshaft lobes are designed by starting with the lift curve, and working backwards to determine the lobe shape that will produce the lift curve. It was developed to allow the user to fully optimize the selection of engine components and engine settings for the ultimate engine build. Cam design software is fully integrated into mechdesigner you can model then let mechdesigner calculate the cam coordinates of just about every cam type, including. Performance camshaft design help practical machinist. This is to be expected in any software that designs at lift. Manufacturer of custom 8620 steel cam cores, prototype cams, masters, use mostaly all cnc equipment.
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