This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Parametric Investigation of Variable Valve Timing Applied to a Turbocharged Diesel Engine
Annotation ability available
Sector:
Language:
English
Abstract
This paper explains the reasons for applying variable valve timing to a diesel engine, in order to reduce the likelihood of inlet port fouling at part load. The results from a cycle simulation are compared with experimental results, from an engine tested with three different valve timings. Good agreement between the model and the engine is demonstrated by comparisons of experimental and simulation results for both global parameters, and cycle resolved pressure measurements (cylinder and manifolds). The cycle simulation has thus been used to predict the benefits that accrue from the application of variable valve timing to a turbocharged diesel engine. Reducing the valve overlap was found to be beneficial at part load. The greatest reduction in the reverse flow of exhaust residuals into the inlet manifold, was obtained if the inlet valve opening was delayed by phasing the inlet valve events.
Recommended Content
Technical Paper | Variable Valve Actuation Mechanisms and the Potential for their Application |
Technical Paper | The Flexible Diesel Engine |
Technical Paper | Design and Analysis of a Roller Follower Variable Valve Timing System |
Authors
Citation
Leonard, H., Stone, C., and Charlton, S., "Parametric Investigation of Variable Valve Timing Applied to a Turbocharged Diesel Engine," SAE Technical Paper 910453, 1991, https://doi.org/10.4271/910453.Also In
References
- STONE R. KWAN E. ‘Variable Valve Actuation Mechanisms and the Potential for their Application’ SAE 890673 Detroit 1989
- AHMAD T. THEOBALD M.A. ‘A Survey of Variable-Valve-Actuation Technology SAE 891674 1989
- ‘Variable Inlet Valve Timing Aids Fuel Economy’ CME 31 4 19 1984
- ZAPPA G. FRANCA T. ‘A 4-Stroke High Speed Diesel Engine with Two Stages of Supercharging and Variable Compression Ratio’ 13th CIMAC Congress Vienna
- CHARLTON S.J. ‘Simulation Program for Internal Combustion Engines’ University of Bath 1986
- EICHELBERG G. ‘Some New Investigations of Old Combustion Engine Problems’ Engineering 148 Oct-Dec 1939
- WOSCHNI G. ‘A Universally Applicable Equation for the Instantaneous Heat Transfer Coefficient in the Internal Combustion Engine’ SAE Paper 670931 1967
- HOHENBURG G.F. ‘Advanced Approaches for Heat Transfer Calculations’ SAE Paper 790825 1979
- ANNAND W.J.D. ‘Heat Transfer in the Cylinders of Reciprocating Internal Combustion Engines’ Proc.I.Mech.E. 177 76 1963
- CHARLTON S.J. KEANE A.J. LEONARD H.J. STONE C.R. ‘Application of Variable Valve Timing to a Highly Turbocharged Diesel Engine’ Conf. Proc. I.Mech.E. 4th Int. Conf. on Turbochargers and Turbocharging Paper C405/044 MEP London 1990
- WATSON N. MARZOUK M. PILLEY A.D. ‘A Combustion Correlation for Diesel Engine Simulation’ SAE 800029 Also in Diesel Combustion and Emissions SP86 1980
- DUNHAM J. CAME P.M. ‘Improvements to the Ainley-Mathieson Method of Turbine Performance Prediction’ Trans. ASME , 70-GT-2, J.Engg.Power 92 1970
- WATSON N. JANOTA M.S. Turbocharging the Internal Combustion Engine Macmillan 1982
- TOWNSEND R.J. ‘Investigation of the Effect of Variable Valve Timing on Part Load Performance of a Highly Rated Diesel Engine’ Final Year Project Report Brunel University 1989
- WATSON N. MARZOUK M. ‘A Non-Linear Digital Simulation of Turbocharged Diesel Engines Under Transient Conditions SAE 770123 1977