This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
An Analysis of Friction Reduction Techniques for the Direct-Acting Valve Train System of a New-Generation Lightweight 3-Liter V6 Nissan Engine
Annotation ability available
Sector:
Language:
English
Abstract
An investigation was made of techniques for reducing the friction of lightweighted direct-acting valve train systems. The techniques examined included improving the cam/follower surface finish and reducing the valve spring load. The characteristics of each approach and the valve train friction reduction obtained with each one were clarified by experimentation and analysis.
As a result, the friction reduction techniques analyzed in this work reduce the friction level of a direct-acting valve train by approximately 40% in comparison with the previous valve train.
These techniques have been applied for the direct-acting valve train system of new-generation, lightweight, 3-liter V6 Nissan engine.
Recommended Content
Citation
Katoh, A. and Yasuda, Y., "An Analysis of Friction Reduction Techniques for the Direct-Acting Valve Train System of a New-Generation Lightweight 3-Liter V6 Nissan Engine," SAE Technical Paper 940992, 1994, https://doi.org/10.4271/940992.Also In
New Developments in Engine Design and Engine Component Technology
Number: SP-1017; Published: 1994-03-01
Number: SP-1017; Published: 1994-03-01
References
- Miyake J. et al. “Tribology of Engine Materials for Sliding Contact” Automotive Engineers 45 6 1991 72 78
- Miyamura N. et al. “Development of Roller Rocker Arm” INTERNAL COMBUSTION ENGINE 26 3311 1987 47 52
- Staron J.T. et al. “An Analysis of Valve Train Friction in Terms of Lubrication Principles” SAE Paper, No. 830165
- Japan Lubrication Society Lubrication hand book 1 5
- Pieprzak J.m. et al. “Experimental Evaluation of Tappet/bore and Cam/Tappet Friction for a Direct Acting Bucket Tappet Valvetrain” SAE Paper, No. 902086
- Bell J.C. et al. “Prediction of Automotive Valve Train Wear Patterns with Simple Mathematical Models” 1985 323 333
- Nakahara et al. “Effects of Surface Roughness and Bearing Aspect Ratio on Valve Train Friction Under Fluid Lubrication,” Lubrication 28 1 1983 543 548
- Jeng Yeau-Ren et al. “Experimental Study of the Effects of Surface Roughness on Friction ASLE Trans. 33 1990 402 410
- Yasuda Y. et al. “An Experimental Study of Cam/Follower Friction in Automotive Engines (II),” Tribology Conference Japan Lubrication Society Tokyo May 1991 117 120