PRI highlights FunctionSIM Valvetrain Simulation and Cam Design
In the June 2009 issue of Performance Racing Industries magazine, readers learn what industry insiders have known for several years: that engine testing on the dyno and track can be enhanced with functional simulation.
The article states: "'We can model an engine in Engine Simulation to optimize valve events, design a new cam using Valvetrain Simulation, use CFD to optimize the shape of the valve and valve seat geometry before manufacturing a single part,' said Brian Kurn, of FourStrokeDesign."
"Before Valvetrain Simulation [RecurDyn], for example, everything had to be manufactured and physically tested in order to find out whether or not your design was effective. Using Valvetrain Simulation, several designs can be evaluated in a short period of time."
"Simulations can also shortcut the testing procedure, significantly reducing or even eliminating testing costs."
"' NASCAR engines use pushrod-operated valvetrain systems,' Kurn continued. 'The dynamic valve lift curves are radically different when compared to the static valve lift curve of a given pushrod valvetrain system. Being able to predict dynamic valve and spring behavior is very valuable in a market as highly competetive as NASCAR Sprint Cup racing. With Valvetrain Simulation, you can explore the possibilites with a high degree of confidence and identify possible design flaws."
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