A multi-scale approach to analysis of valve train systems

Abstract: The valve train system synchronises the engine timing (inlet and exhaust) with the thermodynamics/combustion process. Thus, its optimal operation is vital for the health of the entire engine. The interplay between various forms of dynamics (e.g inertial, structural and impact/contact) and reactions due to loaded tribological conjunctions leads to a complex problem. The solution requires simplifications and assumptions based on careful analysis. The current chapter describes a modelling approach which integrates the fundamental aspects of valve train behaviour in a fast converging methodology.

[1]  M. P. Koster,et al.  Effect of Flexibility of Driving Shaft on the Dynamic Behavior of a Cam Mechanism , 1975 .

[2]  B. Hamrock,et al.  Fundamentals of Fluid Film Lubrication , 1994 .

[3]  D. Dowson,et al.  Elasto-hydrodynamic lubrication : the fundamentals of roller and gear lubrication , 1966 .

[4]  Homer Rahnejat,et al.  Elastodynamic transient analysis of a four-cylinder valvetrain system with camshaft flexibility , 2005 .

[5]  N. Henein,et al.  Experimental Analysis of Dynamics and Friction in Valve Train Systems , 2002 .

[6]  Walter Bryzik,et al.  Simplified Elasto-Hydrodynamic Friction Model of the Cam-Tappet Contact , 2003 .

[7]  Homer Rahnejat,et al.  Transient elastohydrodynamic lubrication of finite line conjunction of cam to follower concentrated contact , 2002 .

[8]  M. Arnold,et al.  Analysis of Dynamic Interactions in Valve Train Systems of IC- Engines by Using a Simulation Model , 1993 .

[9]  Toru Kurisu,et al.  A Study of Jump and Bounce in a Valve Train , 1991 .

[10]  K. Johnson,et al.  Fluid Film Damping of Rolling Contact Vibrations , 1975 .

[11]  Homer Rahnejat,et al.  Integrated Tribological Analysis within a Multi- physics Approach to System Dynamics , 2005 .

[12]  Z. Jin,et al.  Transient analysis of isothermal elastohydrodynamic circular point contacts , 2001 .

[13]  Andreas Schamel,et al.  Modeling and Measurement Techniques for Valve Spring Dynamics in High Revving Internal Combustion Engines , 1993 .

[14]  P. A. Willermet,et al.  An Analysis of Valve Train Friction in Terms of Lubrication Principles , 1983 .

[15]  Donald J. Patterson,et al.  Measurement of Piston and Ring Assembly Friction Instantaneous IMEP Method , 1983 .

[16]  J. Greenwood,et al.  The Contact of Two Nominally Flat Rough Surfaces , 1970 .

[17]  Y. Wakuri,et al.  Studies on Friction Characteristics of Reciprocating Engines , 1995 .

[18]  Ronald L. Stene,et al.  Effect of Valve-Cam Ramps on Valve Train Dynamics , 1999 .

[19]  R. Gohar,et al.  Elastohydrodynamic Lubrication of Finite Line Contacts , 1983 .

[20]  K. Johnson,et al.  The Rheological Properties of Elastohydrodynamic Lubricants , 1986 .

[21]  Homer Rahnejat,et al.  Multi-physics analysis of valve train systems: From system level to microscale interactions , 2007 .