Multibody System Dynamics Model Implementation in the Camshaft Engines

The new engine demands performance increasing, fuel consumption, exhaust-gas and noise emissions turn to diesel in special automakers. The way to improve fuel economy and thus the emition of less CO₂ in diesel engines is an environmental challenge key for reducing emissions of nitrogen oxides (NO_x) and particular matters. Market demands have resulted in development of high-performance fuel-injection system with higher pressure injection that better atomize fuel and precisely control injection timing and quantity. The valvetrain designers are faced with new requirements to achieve the new limits. The latest Tier II U.S. emissions regulations are being phased in between 2004 and 2007, when 100% of new registrations will have to comply.

The multibody system dynamics based on the classical mechanics treated by Newton, Euler, D'Alembert and Lagrange and high developed in the last 15 years by Kortüm, Schiehlen and Huston. The objective is to develop a model using the available tools to reproduce some valvetrain behaviors.

In the first step some single components from the valvetrain will be considered and the boundary conditions discussed and presented.