This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Analysis of Advantages and of Problems of Electromechanical Valve Actuators
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 4, 2002 by SAE International in United States
Annotation ability available
The electromechanical devices proposed in technical literature are very flexible. However, their working principle (fixed lift, fixed lifting time and variable valve events) imposes the use of different strategies, such as cylinder or port deactivation to enable work at partial loads. This happens in particular at low loads.
The present paper aims to evaluate the effect of the design and of the strategies adopted to vary the load (cylinder or port deactivation etc) on performance and on pollutant formation of a stoichiometric DISI engine. The calculations were performed by a commercial one-dimensional code (Wave produced by Ricardo). This tool was also used to give inputs to the design of the electromechanical actuator.
The electromechanical design of the actuator was carried out with the aid of the code Flux2D produced by Cedrat. This code allows the complete simulation of transients and of the electrical losses of the actuator.
The system requirements of performing the first lift at engine start up and catching in normal operation were analyzed. In this way a fairly realistic picture of the main advantages and of the typical problems of Electromechanical Valve Actuators was outlined.
CitationGiglio, V., Iorio, B., Police, G., and di Gaeta, A., "Analysis of Advantages and of Problems of Electromechanical Valve Actuators," SAE Technical Paper 2002-01-1105, 2002, https://doi.org/10.4271/2002-01-1105.
- TitoloA., “The Variable Valve Timing System Application on a V8 Engine”, SAE paper 910009
- HamazakiM., HosakaT., “Development of the Variable Valve Timing and Lift (VTEC) engine for the Honda NSX ”, SAE paper 910008
- Claus Brustle and Dietmar Schwarzenthal, Porsche AGF., “Variocam Plus- A Highlight of the Porsche 911 Turbo Engine”, SAE paper 2001-01-0245
- Pierik Ronald J. and BurkhardJames F., “Design and Development of a Mechanical Variable Valve Actuation System”, SAE paper 2000-01-1221
- FlierlR. and KlutingM., “ The Third Generation of Valve trains - New Fully Variable Valve trains for Throttle-Free Load Control”, SAE paper 2000-01-1227
- Shinichi Takemura, AoyamaShunichi, SugiyamaTakanobu, NoharaTseneyasu and MotekiKatusuya, NakamuraMakamoto and HaraSeinosuke, “ A study of a Continuous Variable Valve Event and Lift (VEL) System, SAE paper 2001-01-0243
- Makamoto Nakamura and Seinosuke Hara, YamadaYoshihiko, TakedaKeisuke, OkamotoNaoki and HibiTsutomu, TakemuraShinichi, AoyamaShunichi, “A Continuous Variable Valve Event and Lift Control Device (VEL) for Automotive Engines”, SAE paper 2001-01-0244
- NuccioP. “ Distribuzione variabile come mezzo per la regolazione del motore ad accensione comandata” ATA, settembre 1983 vol. 36 N° 9, Paper 82071 XIX FISITA Congress - Melbourne.
- BernardL., FerrariA., VattaneoF., VafidisC. “Developments in Fiat's electro-hydraulic variable valve actuation system”, Congress on variable valve timing, Haus der Technik - Essen, March 28-29 2000
- Henry Rassern R., “Single-Cylinder Engine Test of a Motor-Driven Variable-Valve Actuator”, SAE paper 2001-01-0241
- PischingerM. et al., „Benefits of the Electromechanical Valve Train in Vehicle Operation”, SAE paper 2000-01-1223
- ButzmannS. and MelbertJ., KochA., „Sensor less Control of Electromagnetic Actuators for Variable Valve Train, SAE paper 2000-01-1225
- PontoppidanM., GavianiG., BellaG., de MaioA. and RoccoV., “Experimental and Numerical Approach to Injection and Timing Optimization of Lean GDI-Combustion Behavior”, SAE paper 1999-01-0173
- HeywoodJ. B.,, “Internal Combustion Engines”, McGraw-Hill, 1989
- WAVE by RICARDO Software, version 5.2 May 2000
- GiglioV., IorioB., PoliceG., di GaetaA., “Preliminary Experiences in the Design of an Electromechanical Valve Actuator”, ICE 2001 congress, Capri, September, 23-25, 2001
- FLUX 2D by CEDRAT Software, version 7.5.2 March 2001
- HoffmannW., StefanopoulouA., “Valve Position Tracking for Soft Landing of Electromechanical Camless Valve Train”, proceedings IFAC 2001, pag. 305-310.
- BodeH., “Lead-Acid Batteries”, John Wiley & Sons, Princeton, New Jersey, 1977, ISBN 0-471-08455-7.
- DianaS., IorioB., GiglioV., PoliceG., “The Effect of Valve Lift Shape and Timing on Air Motion and Mixture Formation of DISI Engines Adopting Different VVA Actuators”, SAE paper 2001-01-3553.
- Wolfgang Salber, KemperHans, van der StaayFrank , EschThomas, “The Electro-Mechanical Valve Train - A System Module for Future Powertrain Concepts”, MTZ Motortechnische Zeitschrift 61(2000)12.