This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Effect of Exhaust Runner Length, Valve Timing and Lift on the Performance of a Gasoline Engine
Technical Paper
2019-01-0771
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
English
Abstract
Internal combustion (IC) engine exhaust system can influence the engine’s performance in a significant way. This paper shows that a variable exhaust manifold runner length can improve the engine performance in terms of its output torque by over 10% especially at lower engine speed. Similarly, other exhaust systems such as valve timing and valve lift can improve the performance of the engine in different magnitudes. But when smaller improvements are clubbed together, a significant improvement can be achieved. This paper researches first the exhaust runner length on the engine’s performance. Then, the exhaust valve timing is adjusted to further improve the engine torque produced for the exhaust runner lengths analyzed. Study of a combined effect showed that the runner length requirement shifts slightly as the valve timing is changed. Due to practical limitations foreseen in having longer runner lengths and limitations in the rate of runner length variation, certain areas have to undergo through a region where the torque values are as low as they can be. Though this happens in every single exhaust system out in the market today, valve lift is be used to compensate this loss. In this research the engine torque loss at these points can be regained by 50% by taking the benefit of a variable exhaust valve timing and valve lift system. The combined effect of changing runner length, valve timing and valve lift yields improvements in torques of 2-3% and 7-10% at higher and lower engine speeds, respectively.
Recommended Content
Authors
Citation
Bari, S., "Effect of Exhaust Runner Length, Valve Timing and Lift on the Performance of a Gasoline Engine," SAE Technical Paper 2019-01-0771, 2019, https://doi.org/10.4271/2019-01-0771.Data Sets - Support Documents
| Title | Description | Download |
|---|---|---|
| Unnamed Dataset 1 | ||
| Unnamed Dataset 2 |
Also In
References
- 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 2014 10.4271/2014-01-1707
- Liu , K. et al. Effect of Asynchronous Valve Timing on Combustion Characteristic and Performance of a High Speed SI Marine Engine with Five Valves Energy Conversion and Management 123 Supplement C 185 199 2016
- Ghodke , S. and Bari , S. Effect of Integrating Variable Intake Runner Diameter and Variable Intake Valve Timing on an SI Engine's Performance SAE Technical Paper 2018-01-0380 2018 10.4271/2018-01-0380
- 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 10.4271/2018-01-0376
- Tabaczynski , R.J. Effects of Inlet and Exhaust System Design on Engine Performance 1982 10.4271/821577
- Sawant , P. , Warstler , M. , and Bari , S. Exhaust Tuning of an Internal Combustion Engine by the Combined Effects of Variable Exhaust Pipe Diameter and an Exhaust Valve Timing System Energies 11 6 1545 2018
- Saad , I. and Bari , S. CFD Investigation of In-Cylinder Air Flow to Optimize Number of Guide Vanes to Improve CI Engine Performance Using Higher Viscous Fuel International Journal of Automotive and Mechanical Engineering 8 1096 1107 2014
- Gajula V. and Bari S. 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 Congress and Exposition Tampa, FL 2017 1 10
- Aradhye O. and Bari S. 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 2017 1 8
- 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 2007 10.4271/2007-01-2041
- Blair , G.P. , Mackey , D. , Ashe , M. , and Chatfield , G. Exhaust Tuning on a Four-Stroke Engine; Experimentation and Simulation SAE Technical Paper 2001-01-1797 2001 10.4271/2001-01-1797
- Ibrahim A. and Bari S. An Investigation on Using EGR in Natural Gas SI Engine International Conference on Mechanical Engineering Dhaka, Bangladesh 2007 Th-23
- Heywood , J.B. Internal Combustion Engine Fundamentals New York McGraw-Hill 1988
- Pulkrabek , W.W. Engineering Fundamentals of the Internal Combustion Engine 2004 http://books.google.com/books?id=_uZSAAAAMAAJ
- Bell , A.G. Performance Tuning in Theory and Practice: Four Strokes Haynes 1981
- Takemura , S. et al. A Study of a Continuous Variable Valve Event and Lift (VEL) System SAE Technical Paper 2001-01-0243 2001 10.4271/2001-01-0243
- Kreuter , P. , Heuser , P. , Reinicke-Murmann , J. , Erz , R. et al. The Meta VVH System-The Advantages of Continuously Mechanical Variable Valve Timing SAE Technical Paper 1999-01-0329 1999 10.4271/1999-01-0329
- Harada , J. , Yamada , T. , and Watanabe , K. The New L4 Gasoline Engines with VALVEMATIC System Fortschritt Berichte-Vdi Reihe 12 Verkehrstechnik Fahrzeugtechnik 672 2 278 2008
- Hosaka , T. and Hamazaki , M. Development of the Variable Valve Timing and Lift (VTEC) Engine for the Honda NSX SAE Technical Paper 910008 1991 10.4271/910008
- Matsuki , M. , Nakano , K. , Amemiya , T. , Tanabe , Y. et al. Development of a Lean Burn Engine with a Variable Valve Timing Mechanism SAE Technical Paper 960583 1996 10.4271/960583
- Nishimura , S. , Fukuhara , T. , and Teramoto , M. Nissan V6 3.0 Litre, 4-Cam 24-Valve High Performance Engine SAE Technical Paper 870351 1987 10.4271/870351
- Fujita , T. , Kiga , S. , and Tsuruta , S. The Innovative Variable Valve Event and Lift System (VVEL) for the New Nissan V6 and V8 Engine Fortschritt Berichte-Vdi Reihe 12 Verkehrstechnik Fahrzeugtechnik 672 2 298 2008
- Moriya , Y. , Watanabe , A. , Uda , H. , Kawamura , H. et al. A Newly Developed Intelligent Variable Valve Timing System-Continuously Controlled Cam Phasing as Applied to a New 3 Liter Inline 6 Engine SAE Technical Paper 960579 1996 10.4271/960579
- Shimizu , K. , Fuwa , N. , Yoshihara , Y. , and Hori , K. The New Toyota Variable Valve Timing and Lift System Aachener Kolloquium Fahrzeug und Motorentechnik 2007
- 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 1995 10.4271/950975
- Brüstle , C. and Schwarzenthal , D. Variocam Plus-A Highlight of the Porsche 911 Turbo Engine SAE Technical Paper 2001-01-0245 2001 10.4271/2001-01-0245
- Hu , B. , Akehurst , S. , Brace , C. , Copeland , C. et al. 1-D Simulation Study of Divided Exhaust Period for a Highly Downsized Turbocharged SI Engine-Scavenge Valve Optimization SAE Int. J. Engines 7 3 1443 1452 2014
- Ha , K.-P. , Han , D. , and Kim , W.T. Development of Continuously Variable Valve Lift Engine SAE Technical Paper 2010-01-1187 2010 10.4271/2010-01-1187
- Rahaman , M.F. , Bari , S. , and Veale , D. Flow Investigation of the Product Fill Valve of Filling Machine for Packaging Liquid Products Journal of Food Engineering 85 2 252 258 2008
- Bari , S. and Saad , I. Optimization of Vane Numbers through Simulation and Experiment, and Investigation of the Effect on the Performance and Emissions of a CI (Compression Ignition) Engine Run with Biodiesel Energy 79 248 263 2015
- Bari , S. and Hossain , S.N. Design and Optimization of Compact Heat Exchangers to be Retrofitted into a Vehicle for Heat Recovery from a Diesel Engine Procedia Engineering 105 472 479 2015
- Cooney , C. , Worm , J. , Michalek , D. , and Naber , J. Wiebe Function Parameter Determination for Mass Fraction Burn Calculation in an Ethanol-Gasoline Fuelled SI Engine Journal of KONES 15 567 574 2008
- Schubert , C. , Wimmer , A. , and Chmela , F. Advanced Heat Transfer Model for CI Engines 2005 10.4271/2005-01-0695
- Stone , R. Introduction to Internal Combustion Engines Palgrave Macmillan 2012