This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Effects of Variable Intake Valve Timings and Valve Lift on the Performance and Fuel Efficiency of an Internal Combustion Engine
Technical Paper
2018-01-0376
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
English
Abstract
To comply with the new Corporate Average Fuel Economy (CAFE) standards, automakers are expected to increase the average fuel economy of their vehicles to 54.5 miles per gallon from the current 24.8 miles per gallon by 2025. This research aims at proposing a feasible solution to narrow down the gap between the current and expected fuel economy of the vehicles, yet maintaining the engine’s original performance. A standard model of the KTM 510 cc single cylinder, fuel injected, internal combustion engine (IC) engine is modelled and simulated in Ricardo Wave software package to map the stock engine performance and specific fuel consumption at wide open throttle (WOT). The baseline simulation model is validated against the experimental readings with 98% accuracy. The intake valve timings (IVO, IVC), valve lift and profile, being major contributors to the wave and gas dynamics in the combustion chamber are then varied at all engine speeds to capture the amplified induction pressure wave to boost the volumetric and thermal efficiency and attain optimized engine performance. As a combined effect of varying the above parameters, the engine performance (torque and power) is boosted by an average of 6.02 percent throughout the engine’s operating speed range. The improvement in the lower speed range of 3000-4000 rpm is around 18.72% as this KTM is originally tuned for higher speed range of 5500 to 6000 rpm. The addition of variable valve lifts (VVL) to variable valve timings (VVT) further reduces brake specific fuel consumption (BSFC) at all engine speeds with an average reduction of 0.35%. The results show that the not only the performance of the engine can be boosted, but also the fuel efficiency can be increased by a precise control of VVT and VVL induction assembly.
Recommended Content
Authors
Citation
Sawant, P. and Bari, S., "Effects of Variable Intake Valve Timings and Valve Lift on the Performance and Fuel Efficiency of an Internal Combustion Engine," SAE Technical Paper 2018-01-0376, 2018, https://doi.org/10.4271/2018-01-0376.Data Sets - Support Documents
Title | Description | Download |
---|---|---|
Unnamed Dataset 1 |
Also In
References
- Heywood , J.B. Internal combustion engine fundamentals New York Mcgraw-Hill 1988
- Ibrahim , A. , Bari , S. , and Bruno , F. A study on EGR utilization in natural gas SI engines using a two-zone combustion model SAE Technical Paper 2007-01-2041 1 10 2007
- Saad , I. and Bari , S. Improving air-fuel mixing in diesel engine fuelled by higher viscous fuel using guide vane swirl and tumble device (GVSTD) SAE Technical Paper 2013-01-0867 1 10 2013
- M. Handley and S. Writer 2012 https://www.usnews.com/news/articles/2012/08/29/545-miles-per-gallon-for-all-cars-by-2025-not-exactly
- Bell , A.G. Four-Stroke Performance Tuning Northamptoshire Hayness Publishing 2002
- Saad , I. , Bari , S. , and Hossain , S.N. In-Cylinder Air Flow Characteristics Generated by Guide Vane Swirl and Tumble Device to Improve Air-Fuel Mixing in Diesel Engine Using Biodiesel Procedia Engineering 56 363 368 2013
- K. Hiraku , N. Fuwa , H. Yamada , and T. Yamanashi 2004
- D. A. Moster 2012
- Sammut , G. and Alkidas , A.C. Relative contributions of intake and exhaust tuning on SI engine breathing-A computational study SAE Technical Paper 2007-01-0492 1 19 2007
- Winterbone , D.E. and Pearson , R.J. Design Techniques for Engine Manifolds: Wave Action Methods for IC Engines Michigan Professional Engineering Publishing 1999
- V. Gajula and S. Bari Performance Tuning of an IC Engine Based on Pressure Wave Propagation with a Continuously Variable Exhaust Runner Length and Exhaust Valve Timing System ASME 2017 International Mechanical Engineering Congressand Exposition Tampa, FL, USA 2017 1 10
- O. Aradhye and S. Bari Continuously Varying Exhaust Pipe Length and Diameter to Improve the Performance of a Naturally Aspirated SI Engine ASME 2017 International Mechanical Engineering Congress and Exposition Tampa, FL, USA 2017 1 8
- P. Sawant and S. Bari Combined Effects of Variable Intake Manifold Length, Variable Valve Timing and Duration on the Performance of an Internal Combustion Engine ASME 2017 International Mechanical Engineering Congress and Exposition Tampa, FL, USA 2017 1 10
- Mariucci , V. , Selamet , A. , and Miazgowicz , K.D. Effect of Primary Intake Runner Tapers and Bellmouths on the Performance of a Single Cylinder Engine SAE Technical Paper 2007-01-0382 1 19 2007
- I. E. T. P/L. 2017 http://www.impulsengine.com/how/valve.shtml
- G. B. Jagadishsingh and N. P. Jadhav Effect of Variable Length Intake Manifold on Performance of IC Engine International Journal of Current Engineering and Technology 5 47 52 2016
- Chalet , D. , Mahe , A. , Migaud , J. , and Hetet , J.-F. A Frequency Modelling of the Pressure Waves in the Inlet Manifold of Internal Combustion Engine Applied Energy 88 2988 2994 2011
- Cleary , D. and Silvas , G. Unthrottled Engine Operation with Variable Intake Valve Lift, Duration, and Timing SAE Technical Paper 2007-01-1282 1 16 2007
- Fauzun and A. Kurniawan Ricardo WAVE Simulation on the Effect of Exhaust Header Geometry to the Power and Torque of the UGM’s FSAE Engine International Journal of Engineering and Technology (IJET) 9 4 3338 3348 2017
- M. Delaney 2002 http://www.team-integra.net/forum/blogs/michaeldelaney/130-intake-manifold-tech-runner-size-calculations.html
- Khan , S.A. and Ayyappath , P. Design and Development of Variable Valve Timing and Lift Mechanism for Improving the Performance of Single Cylinder Two Wheeler Gasoline Engine SAE Techincal Paper 2014-01-1699 1 8 2014
- Khudhur , S.H. , Saleh , A.M. , and Chaichan , M.T. The Effect of Variable Valve Timing on SIE Performance and Emissions International Journal of Scientific & Engineering Research 6 173 179 2015
- Malkhede , D.N. and Khalane , H. Maximizing Volumetric Efficiency of IC Engine through Intake Manifold Tuning SAE Technical Paper 2015-01-1738 1 8 2015
- A. O. Yide Design and Analysis of the Intake System of a Formula SAE Car National University of Singapore Singapore 2012
- Stein , R. , Galietti , K. , and Leone , T. Dual Equal Vct-a Variable Camshaft Timing Strategy for Improved Fuel Economy and Emissions SAE Technical Paper 950975 1 15 1995
- Tabaczynski , R.J. Effects of Inlet and Exhaust System Design on Engine Performance SAE Technical Paper 821577 1 12 1982
- P. J. Grutter , D. J. Lipinski , J. A. LoRusso , D. R. Nowland , E. C. Prior , and J. D. Robichaux 1995
- Benedikt , K. , Drexler , G. , and Eder , T. Further Development of BMW’s Fully-Variable Valve Control System Valvetronic MTZ Worlwide 66 9 10 13 2005
- C. C. I. Inc. 2017 http://www.chrysler300club.com/uniq/allaboutrams/ramtheory.htm
- S. Bari and I. Saad Effects of guide vane swirl and tumble device (GVSTD) to the air flow of naturally aspirated CI engine 9th International Conference on Mechanical Engineering (ICME) 2011 1 6
- Ibrahim , A. and Bari , S. Effect of Varying Compression Ratio on a Natural Gas SI Engine Performance in the Presence of EGR Energy & Fuels 23 4949 4956 2009
- W. W. Pulkrabek Engineering Fundamentals of the Internal Combustion Engine N.J. Pearson Prentice Hall 2004
- Saravanan , D. , Gokhale , A. , and Karthikeyan , N. Design and Development of a Novel Charge Boosting System for a Single Cylinder SI Engine SAE Technical Paper 2014-01-1707 1 10 2014
- Fontana , G. and Galloni , E. Variable Valve Timing for Fuel Economy Improvement in a Small Spark-Ignition Engine Applied Energy 86 96 105 2009
- M. Wan 2017 http://www.autozine.org/technical_school/engine/Intake_exhaust.html
- Winterbone , D. and Yoshitomi , M. The Accuracy of Calculating Wave Action in Engine Intake Manifolds SAE Technical Paper 0148-7191 1990
- D. Vizard How to super tune and modify holley carburetors CarTech Inc. 216 2013
- Gray , C. A Review of Variable Engine Valve Timing SAE Technical Paper 880386 1 15 1988
- A. Ibrahim and S. Bari An Investigation on Using EGR in Natural Gas SI Engine International Conference on Mechanical Engineering Dhaka, Bangladesh 2007
- Claywell , M. , Horkheimer , D. , and Stockburger , G. Investigation of intake concepts for a formula SAE four-cylinder engine using 1D/3D (Ricardo WAVE-VECTIS) coupled modeling techniques SAE Technical Paper 2006-01-3652 1 26 2006
- Ricardo 2006
- KTM 2016 http://www.ktmshop.se/documents/29660a4bab78e43834a5cd62155a8d05.pdf
- Shieh , L.-Y. and Kana , H.-C. Advantages of Using a Logarithmic Scale in Pressure-Volume Diagrams for Carnot and Other Heat Engine Cycles American Journal of Physics 82 306 2014