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Numerical Analysis of a New Concept Variable Valve Actuation System
Technical Paper
2006-01-3008
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The present work concerns the analysis of a concept for a new variable valve actuation system for internal combustion engines, denoted HVC (Hydraulic Valve Control system). The system is an electro-hydraulic device which aims at minimizing the power consumption required for the valve actuation. Unlike lost motion devices, where the excess pumped oil is wasted in order to control the lift profile, the HVC system uses a reduced quantity of energy to ensure the actual lift profile. For that reason interesting potentialities to increase the global fuel conversion efficiency of the engine are expected, in addition to the benefits deriving from the control flexibility.
The HVC system has been modeled by means of an hydraulic simulation tool, useful for the dynamic analysis of mechanical and hydraulic systems. In this work the main elements of the device will be described and their relevant modeling parameters will be discussed. The model has been validated by means of experimental lift data obtained in a prototype test bench. In order to properly tune the numerical model various operating conditions have been concerned.
The system shows a high flexibility in the control of the lift and timing. The predicted power consumption is very attractive. The main effects of the oil pressure and of the oil temperature are discussed.
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Authors
- Michele Battistoni - University of Perugia - Italy
- Francesco Mariani - University of Perugia - Italy
- Lucio Postrioti - University of Perugia - Italy
- Carlo N. Grimaldi - University of Perugia - Italy
- Marcello Cristiani - Magneti Marelli Powertrain S.p.A. - Bologna - Italy
- Michele Petrone - Magneti Marelli Powertrain S.p.A. - Bologna - Italy
- Stefano Petrecchia - Magneti Marelli Powertrain S.p.A. - Bologna - Italy
Topic
Citation
Battistoni, M., Mariani, F., Postrioti, L., Grimaldi, C. et al., "Numerical Analysis of a New Concept Variable Valve Actuation System," SAE Technical Paper 2006-01-3008, 2006, https://doi.org/10.4271/2006-01-3008.Also In
References
- Ghauri A. Richardson S.H. Nightingale C.J.E. “Variation of Both Symmetric and Asymmetric Valve Events on a 4-Valve SI Engine and the Effects on Emissions and Fuel Economy” SAE paper 2000-01-1222 2000
- Bohac S. Assanis D.N. “Effect of Exhaust Valve Timing on Gasoline Engine Performance and Hydrocarbon Emissions” SAE paper 2004-01-3058 2004
- Anderson M.K. Assanis D.N. Filipi Z.S. “First and Second Law Analyses of a Naturally-Aspired, Miller Cycle, SI Engine with Late Intake Valve Closure” SAE paper 980889 1998
- Allen J. Law D. “Variable Valve Actuated Controlled Auto-Ignition: Speed Load Maps and Strategic Regimes of Operation” SAE paper 2002-01-0422
- Salber W. Wolters P. Esch T. Geiger J. Dilthey J. “Synergies of Variable Valve Actuation and Direct Injection” SAE paper 2002-01-0706
- Milovanovic N. Blundell D. Gedge S. Turner J. “Cam Profile Switching (CPS) and Phasing Strategy vs. Fully Variable Valve Train (FVVT) Strategy for Transitions between Spark Ignition and Controlled Auto Ignition Modes” SAE paper 2005-01-0766
- Fiorenza R. Pirelli M. Torella E. Pallotti P. Kapus P.E. Kokalj G. Lebenbauer M. “VVT+Port Deactivation Application on a Small Displacement SI 4 Cylinder 16V Engine: An Effective Way to Reduce Vehicle Fuel Consumption” SAE paper 2003-01-0020 2003
- Smith F. Simpson R. “A Camshaft Torque Actuated Vane Style VCT Phaser” SAE paper 2005-01-0764 2005
- Fukuo K. Iwata T. Sakamoto Y. Imai Y. Nakahara K. Lantz K.A. “Honda 3.0 Liter, New V6 Engine” SAE paper 970916 1997
- Brüstle C. Schwarzenthal D. “VarioCam Plus - A Highlight of the Porsche 911 Turbo Engine” SAE paper 2001-01-0245 2001
- Sellnau M. Rask E. “Two-Step Variable Valve Actuation for Fuel Economy, Emissions, and Performance” SAE paper 2003-01-0029 2003
- Flierl R. Klüting M. “The Third Generation of Valvetrains - New Fully Variable Valvetrains for Throttle-Free Load Control” SAE paper 2000-01-1227 2000
- Kreuter P. Heuser P. Reinicke-Murmann J. Erz R. Peter U. ‘The Meta VVH System - The Advantages of a Continuously Mechanical Variable Valve Timing’ SAE paper 1999-01-0329 1999
- 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 2001
- Flierl R. Kausch C. Kairies D. Jubelt M. Hannibal W. “Potential of a Mechanical Fully-Variable Valve Train. Results of Simulated and Actual Engine Operation for the New UniValve System” SAE paper 2005-01-0768 2005
- Bernard L. Ferrari A. Rinolfi R. Vafidis C. “Fuel Economy Improvements Potential of UniAir Throttleless Technology” ATA Conference Venice November 27-29 2002
- Fessler H. Genova M. “An Electro-Hydraulic “Lost Motion” VVA System for a 3.0 Liter Diesel Engine” SAE Paper 2004-01-3018 2004
- Wang Y. Megli T. Haghgooie M. Peterson K.S. Stefanopoulou A.G. “Modeling and Control of Electromechanical Valve Actuator” SAE paper 2002-01-1106
- Cope D. Wright A. “Electromagnetic Fully Flexible Valve Actuator” SAE paper 2006-01-0044 2006
- Allen J. Law D. “Production Electro-Hydraulic Variable Valve-Train for a New Generation of I.C. Engines” SAE paper 2002-01-1109
- Turner J.W.G. Kenchington S.A. Stretch D.A. “Production AVT Development: Lotus and Eaton's Electrohydraulic Closed-Loop Fully Variable Valve Train System” www.greencarcongress.com March 2006
- Denger D. Mischker K. “The Electro-Hydraulic Valvetrain System EHVS - System and Potential” SAE paper 2005-01-0774 2005
- Tuner C.W. Babbitt G.R. Balton C.S. Raimao M.A. Giordano D.D. “Design and Control of a Two-stage Electro-hydraulic Valve Actuation System” SAE Paper 2004-01-1265 2004
- Trajkovic S Milosavljevic A. Tunestål P. Johansson B. “FPGA Controlled Pneumatic Variable Valve Actuation” SAE paper 2006-01-0041 2006
- Ma J. Schock H. Carlson U. Hoglund A. Hedman M. “Analysis and Modeling of an Electronically Controlled Pneumatic Hydraulic Valve for an Automotive Engine” 2006-01-0042 2006
- Schechter M.M. Levin M.B. “Camless engine” SAE Paper 960581 1996
- Imagine S.A. “Amesim - Hydraulic Library” April 2003
- Avl List GmbH “AVL Hydsim Reference Manual” July 2005
- Panciroli M. Cristiani M. Flora R. “Hydraulic Valve Control” Paris 2003 Magneti Marelli internal report