This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Development of a Two-Step Variable Valve Actuation Mechanism Equipped with an Electronic Switching System to Realize Switching Performance within One Cycle
Technical Paper
2017-01-2412
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
English
Abstract
This paper introduces a two-step variable valve actuation (VVA) mechanism equipped with an electronic switching system, which can be applied to OHC valve trains with end pivot rocker arms. The electronic switching system is driven by a dedicated solenoid and is not affected by the temperature or pressure of the engine oil. Therefore, not only can the dynamic stability be secured at the time of mode switching but the operation delay time can also be kept short enough. Several models of two-step VVA mechanisms were fabricated and the operability of the mechanism and switching system was experimentally confirmed. The two-step VVA mechanism developed in this study can also be used as a cylinder deactivation (CDA) system by assigning the lift of the low-speed cam to be zero. By attaching a roller to the portion of the rocker arm that is in contact with the base cam, the problem of pad wear, which is often present in CDA mechanism, is also fundamentally solved.
Authors
Citation
Kim, D., Lee, D., Park, J., Hwang, S. et al., "Development of a Two-Step Variable Valve Actuation Mechanism Equipped with an Electronic Switching System to Realize Switching Performance within One Cycle," SAE Technical Paper 2017-01-2412, 2017, https://doi.org/10.4271/2017-01-2412.Data Sets - Support Documents
Title | Description | Download |
---|---|---|
Unnamed Dataset 1 | ||
Unnamed Dataset 2 | ||
Unnamed Dataset 3 | ||
Unnamed Dataset 4 | ||
Unnamed Dataset 5 | ||
Unnamed Dataset 6 |
Also In
References
- Tagami , H. , Yasui , Y. , Sato , M. , and Ito , H. Management System for Continuously Variable Valve Lift Gasoline Engine SAE Technical Paper 2007-01-1200 2007 10.4271/2007-01-1200
- Flierl , R. and Klüting , M. The Third Generation of Valvetrains - New Fully Variable Valvetrains for Throttle-Free Load Control SAE Technical Paper 2000-01-1227 2000 10.4271/2000-01-1227
- Takemura , S. , Aoyama , S. , Sugiyama , T. , Nohara , T. et al. A Study of a Continuous Variable Valve Event and Lift (VEL) System SAE Technical Paper 2001-01-0243 2001 10.4271/2001-01-0243
- Ha K. , Kim W. , Lee C. , Kim H. , Choi M. , Han D. , Suh I. , Kim B. , Kim D. Development of Continuously Variable Valve Lift (CVVL) Engine KSAE 70 75 2008
- Kreuter , P. , Heuser , P. , Reinicke-Murmann , J. , Erz , R. et al. Variable Valve Actuation - Switchable and Continuously Variable Valve Lifts SAE Technical Paper 2003-01-0026 2003 10.4271/2003-01-0026
- Kim H. , Shim J. and Lee J. Type synthesis of Variable Valve Lift Mechanism Using Theory Full Conference Proceedings KSAE 1647 1652 2006
- Park C. Report on the trend of Patent about Variable Valve Timing Apparatus Korea Institute of Patent Information 2003
- Radulescu , A. , McCarthy , J. JR , and Brownell , S. Development of a Switching Roller Finger Follower for Cylinder Deactivation in Gasoline Engine Applications SAE Technical Paper 2013-01-0589 2013 10.4271/2013-01-0589
- Sellnau , M. , Kunz , T. , Sinnamon , J. , and Burkhard , J. 2-step Variable Valve Actuation: System Optimization and Integration on an SI Engine SAE Technical Paper 2006-01-0040 2006 10.4271/2006-01-0040
- Turner , C. , Babbitt , G. , Balton , C. , Raimao , M. et al. Design and Control of a Two-stage Electro-hydraulic Valve Actuation System SAE Technical Paper 2004-01-1265 2004 10.4271/2004-01-1265
- Zheng , Q. Characterization of the Dynamic Response of a Cylinder Deactivation Valvetrain System SAE Technical Paper 2001-01-0669 2001 10.4271/2001-01-0669
- Sellnau , M. and Rask , E. Two-Step Variable Valve Actuation for Fuel Economy, Emissions, and Performance SAE Technical Paper 2003-01-0029 2003 10.4271/2003-01-0029
- Trudell , D. , McCarthy , J. , Jr. , and Tow , P. Switching Roller Finger Follower Meets Lifetime Passenger Car Durability Requirements SAE Technical Paper 2012-01-1640 2012 10.4271/2012-01-1640
- Schultheis , O. , Gordon , T. , and Metcalf , R. Development and Validation of Diamond-Like Carbon Coating for a Switching Roller Finger Follower SAE Technical Paper 2012-01-1964 2012 10.4271/2012-01-1964