This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
A Study of a Mechanical Continuous Variable Rocker Arm (VRA): PART II Double Intake Valve Control
Technical Paper
2004-01-1392
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
In the previous study (SAE 2003-01-0022), I presented a mechanical continuous variable valve event & valve lift VRA which some versions can integrate the variable timing control. Besides the VRA, the system can be applied to various valve trains, such as DOHC, SOHC and Push rod.
In this VRA part II, a few parts of VRA are developed. For example, positions of camshaft and control shaft, which are closely related, are developed to produce minimum or maximum valve event & valve lift at the least rotation of control shaft. The developments will allow the VRA to produce a faster response and require less operation.
Second part of this study will present the application of the Double Intake Valve Control, which double VRA will control each intake valve separately, while only one intake camshaft is required. Furthermore, this system is expected to support various forms of the combustion, including the gasoline direct injection as well.
The experiments for measuring the characteristics of some types of this VRA, such as torque and emission, will be implemented by using 4-stroke, single cylinder engine.
Recommended Content
Technical Paper | A Study of a Mechanical Continuous Variable Rocker Arm (VRA) |
Technical Paper | A Study on In-Cycle Combustion Control for Gasoline Controlled Autoignition |
Technical Paper | Reduction of HC Emission for Passenger Car Diesel Engine |
Citation
Anontaphan, T., "A Study of a Mechanical Continuous Variable Rocker Arm (VRA): PART II Double Intake Valve Control," SAE Technical Paper 2004-01-1392, 2004, https://doi.org/10.4271/2004-01-1392.Also In
References
- Pierik Ronald J. Burkhard James F. “Design and Development of a Mechanical Variable Valve,” SAE Paper 2000-01-1221
- Hara S. Hidaka A. Tomisawa N. Nakamura M. Todo T. Takemura S. Nohara T. “Application of a Variable Valve Event and Timing System to Automotive Engines,” SAE Paper 2000-01-1224
- Flierl R. Dr.Ing. Kluting M. Dr.Ing. “The Third Generation of Valvetrains - New Fully Variable Valvetrains for Throttle-Free Load Control,” SAE Paper 2000-01-1227
- Takemura S. Aoyama S. Sugiyama T. Nohara T. Moteki K. Nakamura M. Hara S. “A Study of a Continuous Variable Valve Event and Lift (VEL) System,” SAE Paper 2001-01-0243
- Nakamura M. Hara S. Yamada Y. Takeda K. Okamoto N. Hibi T. Takemura S. Aoyama S. “A Continuous Variable Valve Event and Lift Control Device (VEL) for Automotive Engines,” SAE Paper 2001-01-0244
- Kreuter, P. et al. “The Meta VVH System - The Advantages of Continuously Variable Valve Timing” SAE 1999-01-0329
- Brustle C. Schwarzenthal D. The Two - in One Engine - Porsche's Variable Valve System (VVS) SAE Paper 980766
- Kreuter P. Heuser P. Schebitz M. “Strategies to Improve SI-Engine Performance by Means of Variable Intake Lift, Timing and Duration” SAE Paper 920449