This content is not included in your SAE MOBILUS subscription, or you are not logged in.
New Equipment and Methodology to Perform High Speed ValveTrain Dynamics Testing and Analysis
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 08, 2004 by SAE International in United States
Annotation ability available
With the increased need for variable and high-speed valvetrains for improved performance and economy, greater importance must be placed on valvetrain testing and prove-out. To make an accurate assessment of valvetrain capability and high-speed dynamics, improved test and analysis capability is needed.
The objective of this paper is to provide the necessary information for others to understand and perform high-speed valve train dynamics testing using current state-of-the-art equipment. It includes the use of a differential laser vibrometer to measure complete valve lift and velocity and a Rotational Analysis System (RAS) that easily and quickly reduces the data to plots and compares measured valvetrain dynamics to theoretical models. Also covered are valve closing velocity measurements, calculated valve accelerations, torque, torsional vibration, sample rate and filtering. Effects of torsional vibration, sample rate and filtering on measurements are also demonstrated.
CitationSczepanski, J., "New Equipment and Methodology to Perform High Speed ValveTrain Dynamics Testing and Analysis," SAE Technical Paper 2004-01-1720, 2004, https://doi.org/10.4271/2004-01-1720.
- Schamel Andreas R. Hammacher Joachim Utsch Dietrich Ford Motor Co. Modeling and Measurement Techniques for Valve Spring Dymanics in High Revving Internal Combustion Engines SAE 930615
- Suh In-Soo Daewoo Motor Co. Lyon Richard H. RH Lyon Corp An Investigation of Valve Train Noise for the Sound Quality of I. C. Engines SAE 1999-01-1711
- David J. W. North Carolina State University Kim Dojoong Ulsan University Covey J.A. General Motors Optimal Design of High Speed Valvetrain Systems SAE 942502
- Stene Ronald L. Westbrook James III Eovaldi David Chrysler Corporation Analyzing Vibrations in an Internal Combustion Engine SAE 980570