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