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Effect of Breathing Characteristics on the Performance in Spark-Ignition Engines
Published June 12, 2000 by Society of Automotive Engineers of Korea in South Korea
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Adaptive valve timing control is one of the promising techniques to accomplish the optimized mixture formation and combustion depending on the load and speed, which is needed to meet the future challenges of reducing fuel consumption and exhaust emissions. The behavior and the effect of adaptive valve timing control system has been investigated by computer simulation, which simulates the gas dynamics in engines. These programs are typically one-dimensional including complex flow features as ‘special’ boundaries. A code adopting 2-step Lax-Wendroff method with artificial damping terms called FCT(Flux Corrected Transport), was developed to investigate the influence of operational and design parameters on the performance of engines.
The effects of adaptive valve timing control system on volumetric efficiency or engine torque, and pumping loss were investigated. It increased low end torque by about 6%, and reduced pumping loss drastically at low load, high engine speed conditions. The pressure pulsation in intake manifold was affected significantly by adjusting valve timings.
CitationKoo, J. and Bae, C., "Effect of Breathing Characteristics on the Performance in Spark-Ignition Engines," SAE Technical Paper 2000-05-0036, 2000.
- Heywood John B. 1988 Internal Combustion Engine Fundamentals
- Contents of Web page of FEV ( http://www.fev.com )
- Pischinger Martin Salber Volfgang van der Staay Frank Baumgarten Henning Kemper Hans 2000 Benefits of the Electromechanical Valve Train in Vehicle Operation SAE 2000-01-1223
- Cunha Sergio Barros da Hedrick J. Karl Pisano Albert P. 2000 Variable Valve Timing By Means of a Hydraulic Actuation SAE 2000-01-1220
- Flierl R. Kluting M. The Third Generation of Valve trains - New Fully Variable Valvetrains for Throttle-Free Load Control SAE 2000-01-1227
- Horlock J.H. Winterbone D.E. 1982 The Thermodynamics of Internal-Combustion Engines
- Kirkpatrick S.J. Blair G.P. Fleck R. McMullan R.K. 1994 Experimental Evaluation of 1-D Computer Codes for the Simulation of Unsteady Gas Flow Through Engines - A First Phase SAE 941685