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A Comparative Study on Influence of EIVC and LIVC on Fuel Economy of A TGDI Engine Part I: Friction Torques of Intake Cams with Different Profiles and Lifts
ISSN: 0148-7191, e-ISSN: 2688-3627
Published October 08, 2017 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
In order to better understand how the Atkinson cycle and the Miller cycle influence the fuel consumption at different engine speeds and loads, an investigation was conducted to compare influences of early intake valve closing (EIVC) and late intake valve closing (LIVC) on the fuel consumption of a 1.5L turbo-charged gasoline direct injection (TGDI) engine. The engine was tested with three different intake cams, covering three intake durations: 251 degCA (the base engine), 196 degCA (the Miller engine), and 274 degCA (the Atkinson engine). Compression ratios are 9.5:1 for the base engine and 11.4:1 for the Atkinson and Miller engines, achieved with piston modifications. Results of this investigation will be reported in three papers focusing respectively on characteristics of the engine friction, in-cylinder charge motions for different intake events, and combustion and fuel economy without and with EGR for the naturally aspirated mode and boost mode. The present paper is Part I of this investigation. This study reports the results of detailed analyses as well as experiments on characteristics of the cam dynamics and friction forces for the three different intake cams at engine speeds from 700 to 5700 rpm. It was found that, for the three engines investigated in this study, the maximum motoring friction torque for the Atkinson engine was about 3% greater and the Miller engine was about 3% less than that of the base engine. Differences in the engine friction torques decreased with increasing the engine speed, and became insignificant at 5700rpm.
- Xianlin Ouyang - Jiangling Motors Co., Ltd.
- Ho Teng - Jiangling Motors Co., Ltd.
- Xiaochun zeng - Jiangling Motors Co., Ltd.
- Xuwei Luo - Jiangling Motors Co., Ltd.
- Tingjun Hu - Jiangling Motors Co., Ltd.
- Xianlong Huang - Jiangling Motors Co., Ltd.
- Jiankun Luo - Jiangling Motors Co., Ltd.
- Yongli Zhou - Jiangling Motors Co., Ltd.
CitationOuyang, X., Teng, H., zeng, X., Luo, X. et al., "A Comparative Study on Influence of EIVC and LIVC on Fuel Economy of A TGDI Engine Part I: Friction Torques of Intake Cams with Different Profiles and Lifts," SAE Technical Paper 2017-01-2245, 2017, https://doi.org/10.4271/2017-01-2245.
Data Sets - Support Documents
|Unnamed Dataset 1|
- Atkinson , J. Gas Engine US patent 367496 1887
- Miller , R. High Expansion, Spark Ignited, Gas Burning, Internal Combustion Engines US patent 2773490 1956
- Miller , R. Supercharged Engine US patent 2817322 1957
- Volkswagen Volkswagen at the 37th Vienna Motor Symposium volkswagen-media-services.com
- Honda The VTEC Engine world.honda.com
- Shibata , M. , Kawamata , M. , Komatsu , H. , Maeyama , K. et al. New 1.0L I3 Turbocharged Gasoline Direct Injection Engine SAE Technical Paper 2017-01-1029 2017 10.4271/2017-01-1029
- Autotrend Toyota Debuts New Turbo-Four for Auris Hatchback thetruthaboutcars.com
- Magda , M. New Lexus 2.0T Turbo Morphs between Otto and Atkinson enginelabs.com
- Cordier , M. , Laget , O. , Duffour , F. , Gautrot , X. et al. Increasing Modern Spark Ignition Engine Efficiency: A Comprehension Study of High CR and The Atkinson cycle SAE Technical Paper 2016-01-2172 2016 10.4271/2016-01-2172
- Kentfield , J. Diesel Engines with Extended Expansion Strokes SAE Technical Paper 891866 1989 10.4271/891866
- Crowe , P. Honda EXlink Extended Expansion Linkage Engine thekneeslider.com/honda-exlink-extended-expansion-linkage-engine
- Martins , J. , Uzuneanu , K. , Ribeiro , B. , and Jasasky , O. Thermodynamic Analysis of an Over-Expanded Engine SAE Technical Paper 2004-01-0617 2004 10.4271/2004-01-0617
- Zhao , J. Research and Application of Over-expanded Cycle (Atkinson and Miller) Engines - A Review Applied Energy 185 1 January 2017
- AVL BOOST-HYDSIM User Guide AVL Advanced Simulation Technologies 2013
- AVL EXITE TIME DRIVE Valve Train Dynamics AVL Advanced Simulation Technologies 2013
- SKF The SKF Model for Calculating the Friction Moment skf.com/group/products/bearings-units-housings/roller-bearings/principles/friction/skf-model